:root {
  --navy: #1e293b;
  --navy-lighter: #3b4a63;
  --radius: 10px;
  --radius-lg: 16px;
}

@keyframes messageSlideIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes shimmerSlide {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

@keyframes typingShimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes loginCardIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}


/* Login Screen */
.login-overlay {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 30%, #312e81 60%, #1e293b 100%);
  background-size: 300% 300%;
  animation: loginGradientShift 15s ease infinite;
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}

.login-overlay::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 25% 15%, rgba(99,102,241,0.2) 0%, transparent 50%),
              radial-gradient(ellipse at 75% 80%, rgba(139,92,246,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 50%, rgba(59,130,246,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.login-overlay::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 80%, rgba(56,189,248,0.08) 0%, transparent 40%),
              radial-gradient(circle at 80% 20%, rgba(168,85,247,0.08) 0%, transparent 40%);
  pointer-events: none;
  animation: loginOrbFloat 20s ease-in-out infinite alternate;
}

@keyframes loginGradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes loginOrbFloat {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.1); }
}

.login-card {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: 24px;
  padding: 48px 44px;
  width: 100%; max-width: 420px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.35),
              0 0 0 1px rgba(255,255,255,0.08),
              inset 0 1px 0 rgba(255,255,255,0.6);
  position: relative; z-index: 1;
  animation: loginCardIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-card h1 {
  font-size: 24px; font-weight: 700;
  color: var(--gray-900); margin-bottom: 6px;
  letter-spacing: -0.5px;
}

.login-card p {
  color: var(--gray-500); font-size: 14px;
  margin-bottom: 28px; line-height: 1.5;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--gray-600); margin-bottom: 6px;
  letter-spacing: 0.01em;
}

.form-group input {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px; font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  background: var(--white);
  color: var(--gray-800);
}

.form-group input:hover {
  border-color: var(--gray-300);
  background: var(--gray-50);
}

.form-group input:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.1);
  background: var(--white);
}

.btn-primary {
  width: 100%; padding: 12px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: var(--white);
  border: none; border-radius: var(--radius);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
  box-shadow: 0 1px 3px rgba(37,99,235,0.3), 0 1px 2px rgba(37,99,235,0.2);
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  box-shadow: 0 4px 14px rgba(37,99,235,0.4), 0 2px 4px rgba(37,99,235,0.2);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(37,99,235,0.2);
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

/* Main Layout */
.sidebar {
  width: 272px; background: var(--gray-50);
  color: var(--gray-800);
  display: flex; flex-direction: column;
  flex-shrink: 0;
  border-right: 1px solid var(--gray-200);
  transition: width 0.2s ease, opacity 0.2s ease;
  overflow: hidden;
}

.sidebar.desktop-collapsed {
  width: 0;
  border-right: none;
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-header h2 {
  font-size: 16px; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
}

.sidebar-header h2 span { font-size: 20px; }

.new-chat-btn {
  margin: 12px 16px;
  padding: 10px 16px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
  display: flex; align-items: center; gap: 8px; justify-content: center;
  box-shadow: 0 2px 8px rgba(37,99,235,0.25);
  letter-spacing: 0.01em;
}

.new-chat-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 4px 12px rgba(37,99,235,0.35);
  transform: translateY(-1px);
}
.new-chat-btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(37,99,235,0.2);
}

.sidebar-sections {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.session-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 4px 12px;
}

.session-list-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-400);
  padding: 12px 12px 6px;
}

.folder-header {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  color: var(--gray-600);
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  gap: 6px;
  margin-top: 4px;
  user-select: none;
}
.folder-header:hover { background: var(--gray-200); color: var(--gray-800); }
.folder-header .folder-icon { font-size: 13px; transition: transform 0.15s ease; }
.folder-header.collapsed .folder-icon { transform: rotate(-90deg); }
.folder-header .folder-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-header .folder-count { font-size: 10px; background: var(--gray-200); padding: 1px 6px; border-radius: 10px; color: var(--gray-500); flex-shrink: 0; }
.folder-header .folder-actions { display: flex; gap: 2px; opacity: 0; flex-shrink: 0; }
.folder-header:hover .folder-actions { opacity: 1; }
.folder-action-btn {
  background: none; border: none; color: var(--gray-400); cursor: pointer;
  font-size: 12px; padding: 2px 5px; border-radius: 4px; line-height: 1;
}
.folder-action-btn:hover { color: var(--gray-700); background: var(--gray-200); }
.folder-action-btn.delete:hover { color: var(--red-500); }
.folder-contents { padding-left: 8px; }
.folder-contents.hidden { display: none; }

.folder-rename-input {
  background: var(--white); border: 1px solid var(--gray-300);
  color: var(--gray-800); font-size: 12px; padding: 3px 6px; border-radius: 4px;
  font-family: inherit; width: 100%; outline: none;
}

.new-folder-btn {
  display: flex; align-items: center; gap: 6px; justify-content: center;
  margin: 4px 12px 8px; padding: 6px;
  background: transparent; color: var(--gray-500);
  border: 1px dashed var(--gray-300); border-radius: var(--radius);
  font-size: 12px; cursor: pointer; font-family: inherit;
  transition: all var(--transition);
}
.new-folder-btn:hover { color: var(--blue-600); border-color: var(--blue-400); background: var(--blue-50); }

.move-folder-dropdown {
  position: absolute; right: 0; top: 100%; z-index: 100;
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius); min-width: 160px; padding: 4px 0;
  box-shadow: var(--shadow-lg);
}
.move-folder-option {
  display: block; width: 100%; padding: 7px 12px; background: none; border: none;
  color: var(--gray-600); font-size: 12px; cursor: pointer; text-align: left;
  font-family: inherit;
}
.move-folder-option:hover { background: var(--gray-100); color: var(--gray-800); }

.session-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  min-height: 44px;
  color: var(--gray-600);
  border-radius: var(--radius);
  font-size: 13px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  position: relative;
  gap: 8px;
  border-left: 3px solid transparent;
}

.session-item:hover {
  background: var(--gray-100);
  color: var(--gray-800);
  border-left-color: var(--gray-300);
}

.session-item.active {
  background: var(--white);
  color: var(--gray-800);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  border-left-color: var(--blue-500);
  font-weight: 500;
}

.session-item-content {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.session-item-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13px;
  line-height: 1.4;
}

.session-item-meta {
  font-size: 11px;
  color: var(--gray-400);
  margin-top: 2px;
}

.session-delete-btn {
  opacity: 0;
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--transition);
  flex-shrink: 0;
  line-height: 1;
}

.session-item:hover .session-delete-btn {
  opacity: 1;
}

.session-delete-btn:hover {
  color: var(--red-500);
  background: var(--red-100);
}

.session-rename-btn {
  opacity: 0;
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--transition);
  flex-shrink: 0;
  line-height: 1;
}
.session-item:hover .session-rename-btn { opacity: 1; }
.session-rename-btn:hover { color: var(--blue-500); background: var(--blue-50); }
.session-rename-input {
  background: var(--white);
  border: 1px solid var(--gray-300);
  color: var(--gray-800);
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: inherit;
  width: 100%;
  outline: none;
}

.sidebar-nav-links {
  padding: 8px 12px;
  border-top: 1px solid var(--gray-200);
}

.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  color: var(--gray-600);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 13px;
  transition: all var(--transition);
  cursor: pointer;
}

.nav-link:hover { background: var(--gray-200); color: var(--gray-800); }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.logout-btn {
  width: 100%; padding: 8px;
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 13px; cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}

.logout-btn:hover {
  background: var(--red-50);
  color: var(--red-600);
  border-color: var(--red-200);
}

/* Chat Area */
.chat-main {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0;
}

.chat-header {
  padding: 14px 24px;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.chat-header h3 {
  font-size: 15px; font-weight: 600; color: var(--gray-800);
  letter-spacing: -0.01em;
}

.sidebar-toggle-btn {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  color: var(--gray-600);
  border-radius: var(--radius);
  margin-right: 12px;
}

.sidebar-toggle-btn:hover {
  background: var(--gray-100);
}

.chat-messages {
  flex: 1; overflow-y: auto;
  padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
}

.welcome-message {
  text-align: center;
  padding: 60px 20px 20px;
  color: var(--gray-500);
  max-width: 640px;
  margin: 0 auto;
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.welcome-message h2 {
  font-size: 28px; font-weight: 700;
  color: var(--gray-900);
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--blue-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

@media (forced-colors: active) {
  .welcome-message h2,
  body.dark-mode .welcome-message h2 {
    -webkit-text-fill-color: currentColor;
    background: none;
  }
}

.welcome-message p { font-size: 15px; margin-bottom: 32px; color: var(--gray-500); line-height: 1.6; }

.welcome-tips {
  text-align: left;
  margin-top: 8px;
}

.welcome-tips h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  text-align: center;
}

.welcome-examples {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 24px;
}

@media (max-width: 600px) {
  .welcome-examples { grid-template-columns: 1fr; }
}

.welcome-example-btn {
  text-align: left;
  padding: 14px 16px;
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.5;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  position: relative;
}

.welcome-example-btn:hover {
  border-color: var(--blue-400);
  background: linear-gradient(135deg, rgba(59,130,246,0.04) 0%, rgba(99,102,241,0.04) 100%);
  color: var(--gray-800);
  box-shadow: 0 8px 24px rgba(59,130,246,0.12), 0 2px 6px rgba(0,0,0,0.04);
  transform: translateY(-3px);
}

.welcome-example-btn:active {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59,130,246,0.1);
}

.welcome-example-btn .example-icon {
  font-size: 16px;
  margin-right: 8px;
  vertical-align: middle;
}

.welcome-best-practices {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: 4px;
}

.welcome-tip-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  background: var(--gray-50);
  border: 1px solid var(--gray-150, #e8e8e8);
  border-radius: 20px;
  font-size: 12px;
  color: var(--gray-500);
}

.tips-category {
  text-align: left;
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--gray-50);
  border-radius: 10px;
  border: 1px solid var(--gray-150, #e8e8e8);
}
.tips-category-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.tips-category ul {
  margin: 0; padding: 0 0 0 18px;
  font-size: 12px; color: var(--gray-500);
  line-height: 1.7;
}
.tips-tool-callout {
  margin-top: 10px;
  padding: 10px 14px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  text-align: left;
  font-size: 12px;
  color: var(--gray-600);
  line-height: 1.6;
}
.tips-tool-callout strong {
  color: var(--primary, #2563eb);
}

.message-group {
  display: flex; gap: 14px;
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
  padding: 2px 0;
}

.message-group.user { justify-content: flex-end; }
.message-group.assistant { justify-content: flex-start; }

.message-avatar {
  width: 32px; height: 32px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
  transition: transform 0.2s ease;
}

.message-group:hover .message-avatar {
  transform: scale(1.05);
}

.assistant .message-avatar {
  background: linear-gradient(135deg, #1e293b, #334155);
  color: var(--white);
  box-shadow: 0 2px 6px rgba(15,23,42,0.2);
}

.user .message-avatar {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: var(--white);
  order: 2;
  box-shadow: 0 2px 6px rgba(37,99,235,0.25);
}

.message-content {
  max-width: 85%;
}

.message-bubble {
  padding: 14px 18px;
  border-radius: 18px;
  font-size: 14px; line-height: 1.7;
}

.user .message-bubble {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: var(--white);
  border-bottom-right-radius: 6px;
  box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}

.assistant .message-bubble {
  background: var(--white);
  color: var(--gray-800);
  border: 1px solid var(--gray-200);
  border-bottom-left-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04), 0 0 0 0.5px rgba(0,0,0,0.02);
}

.assistant .message-bubble p { margin-bottom: 10px; line-height: 1.7; }
.assistant .message-bubble p:last-child { margin-bottom: 0; }
.assistant .message-bubble ul, .assistant .message-bubble ol { padding-left: 24px; margin-bottom: 12px; }
.assistant .message-bubble li { margin-bottom: 4px; line-height: 1.6; }
.assistant .message-bubble li p { margin-bottom: 4px; }
.assistant .message-bubble code { background: var(--gray-100); padding: 2px 6px; border-radius: 4px; font-size: 13px; font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace; }
.assistant .message-bubble pre { background: var(--gray-50); color: var(--gray-800); padding: 0; border-radius: var(--radius); overflow-x: auto; margin: 12px 0; border: 1px solid var(--gray-200); }
.assistant .message-bubble pre code { background: transparent; padding: 12px 16px; color: inherit; display: block; font-size: 13px; line-height: 1.6; font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace; }
.code-block-wrapper { margin: 12px 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); }
.code-block-wrapper pre { margin: 0; border: none; border-radius: 0; }
.code-block-header { display: flex; align-items: center; justify-content: space-between; padding: 6px 12px; background: var(--gray-100); border-bottom: 1px solid var(--gray-200); }
.code-block-lang { font-size: 12px; font-weight: 600; color: var(--gray-500); text-transform: lowercase; font-family: inherit; }
.code-copy-btn { background: none; border: 1px solid var(--gray-300); border-radius: 6px; padding: 3px 10px; font-size: 12px; color: var(--gray-500); cursor: pointer; font-family: inherit; transition: all var(--transition); opacity: 0; }
.code-block-wrapper:hover .code-copy-btn, .code-copy-btn:focus { opacity: 1; }
.code-copy-btn:hover { background: var(--white); color: var(--gray-700); border-color: var(--gray-400); }
.assistant .message-bubble strong { font-weight: 700; color: var(--gray-900); }
.assistant .message-bubble em { font-style: italic; color: var(--gray-700); }
.assistant .message-bubble h1 { font-size: 22px; font-weight: 700; color: var(--gray-800); margin: 20px 0 10px; padding-bottom: 8px; border-bottom: 2px solid var(--blue-100); line-height: 1.3; }
.assistant .message-bubble h1:first-child { margin-top: 4px; }
.assistant .message-bubble h2 { font-size: 18px; font-weight: 700; color: var(--gray-900); margin: 18px 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--gray-150, #e8e8e8); line-height: 1.3; }
.assistant .message-bubble h3 { font-size: 15px; font-weight: 700; color: var(--gray-800); margin: 14px 0 6px; line-height: 1.4; }
.assistant .message-bubble h4 { font-size: 14px; font-weight: 700; color: var(--gray-700); margin: 12px 0 4px; text-transform: uppercase; letter-spacing: 0.3px; line-height: 1.4; }
.assistant .message-bubble blockquote { border-left: 3px solid var(--blue-400); background: var(--blue-50); padding: 10px 14px; margin: 12px 0; border-radius: 0 var(--radius) var(--radius) 0; color: var(--gray-700); font-style: italic; }
.assistant .message-bubble blockquote p { margin-bottom: 4px; }
.assistant .message-bubble blockquote p:last-child { margin-bottom: 0; }
.assistant .message-bubble blockquote.summary-box { border-left: 4px solid var(--blue-500, #3b82f6); background: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(99,102,241,0.06) 100%); padding: 14px 18px; margin: 0 0 16px 0; border-radius: 8px; font-style: normal; color: var(--gray-800); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.assistant .message-bubble blockquote.summary-box p { margin-bottom: 0; font-size: 14px; line-height: 1.6; }
.assistant .message-bubble blockquote.summary-box strong:first-child { color: var(--blue-600, #2563eb); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; display: block; margin-bottom: 4px; }
.assistant .message-bubble .table-wrapper { overflow-x: auto; margin: 12px 0; border-radius: 8px; border: 1px solid var(--gray-200); max-height: 400px; overflow-y: auto; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.assistant .message-bubble table { border-collapse: collapse; width: 100%; min-width: 300px; margin: 0; }
.assistant .message-bubble th { background: var(--gray-800); color: var(--white); padding: 10px 14px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.3px; text-align: left; border: none; position: sticky; top: 0; z-index: 1; cursor: pointer; user-select: none; transition: background 0.15s; }
.assistant .message-bubble th:hover { background: var(--gray-700); }
.assistant .message-bubble th::after { content: '\2195'; margin-left: 6px; opacity: 0.4; font-size: 10px; }
.assistant .message-bubble th.sort-asc::after { content: '\25B2'; opacity: 0.9; }
.assistant .message-bubble th.sort-desc::after { content: '\25BC'; opacity: 0.9; }
.assistant .message-bubble td { padding: 9px 14px; font-size: 13px; text-align: left; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
.assistant .message-bubble tr:last-child td { border-bottom: none; }
.assistant .message-bubble tr:nth-child(even) td { background: var(--gray-50); }
.assistant .message-bubble tr:hover td { background: var(--blue-50); transition: background 0.15s; }
.assistant .message-bubble input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--blue-600); margin-right: 6px; vertical-align: middle; pointer-events: none; }
.assistant .message-bubble li:has(input[type="checkbox"]) { list-style: none; margin-left: -20px; }
.assistant .message-bubble hr { border: none; border-top: 2px solid var(--gray-200); margin: 16px 0; }
.assistant .message-bubble a { color: var(--blue-600); text-decoration: underline; text-underline-offset: 2px; }
.assistant .message-bubble a:hover { color: var(--blue-700); }

.reasoning-box {
  background: linear-gradient(135deg, var(--blue-50) 0%, #eef2ff 100%);
  border: 1px solid var(--blue-200);
  border-left: 3px solid var(--blue-500);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.5;
}

.reasoning-box-clickable {
  transition: all 0.2s ease;
}

.reasoning-box-clickable:hover {
  background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 100%);
  border-color: var(--blue-400);
  box-shadow: 0 2px 8px rgba(59,130,246,0.15);
  transform: translateY(-1px);
}

.reasoning-icon {
  margin-right: 6px;
  font-size: 14px;
}

.reasoning-box strong {
  color: var(--blue-700);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.follow-ups-section {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--gray-100);
}

.follow-ups-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.follow-ups {
  display: flex; flex-wrap: wrap; gap: 8px;
}

.follow-up-btn {
  padding: 8px 16px;
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: 20px;
  font-size: 13px;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
  line-height: 1.4;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.fu-icon {
  font-size: 12px;
  flex-shrink: 0;
}

.follow-up-btn:hover {
  background: linear-gradient(135deg, rgba(59,130,246,0.06) 0%, rgba(99,102,241,0.04) 100%);
  border-color: var(--blue-400);
  color: var(--blue-700);
  box-shadow: 0 4px 12px rgba(59,130,246,0.12);
  transform: translateY(-2px);
}

.follow-up-btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.assistant .message-bubble blockquote.callout-box {
  border-radius: 8px;
  padding: 12px 16px;
  margin: 12px 0;
  font-style: normal;
}

.assistant .message-bubble blockquote.callout-box .callout-icon {
  margin-right: 6px;
  font-size: 15px;
}

.assistant .message-bubble blockquote.callout-box strong {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.assistant .message-bubble blockquote.callout-tip {
  border-left: 4px solid #10b981;
  background: linear-gradient(135deg, rgba(16,185,129,0.08) 0%, rgba(52,211,153,0.06) 100%);
  color: var(--gray-800);
}

.assistant .message-bubble blockquote.callout-tip strong {
  color: #059669;
}

.assistant .message-bubble blockquote.callout-warning {
  border-left: 4px solid #f59e0b;
  background: linear-gradient(135deg, rgba(245,158,11,0.08) 0%, rgba(251,191,36,0.06) 100%);
  color: var(--gray-800);
}

.assistant .message-bubble blockquote.callout-warning strong {
  color: #d97706;
}

.assistant .message-bubble blockquote.callout-key {
  border-left: 4px solid #6366f1;
  background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(129,140,248,0.06) 100%);
  color: var(--gray-800);
}

.assistant .message-bubble blockquote.callout-key strong {
  color: #4f46e5;
}

.assistant .message-bubble blockquote.callout-note {
  border-left: 4px solid #8b5cf6;
  background: linear-gradient(135deg, rgba(139,92,246,0.08) 0%, rgba(167,139,250,0.06) 100%);
  color: var(--gray-800);
}

.assistant .message-bubble blockquote.callout-note strong {
  color: #7c3aed;
}

.assistant .message-bubble blockquote.callout-example {
  border-left: 4px solid #06b6d4;
  background: linear-gradient(135deg, rgba(6,182,212,0.08) 0%, rgba(34,211,238,0.06) 100%);
  color: var(--gray-800);
}

.assistant .message-bubble blockquote.callout-example strong {
  color: #0891b2;
}

.assistant .message-bubble .checklist-item {
  list-style: none;
  margin-left: -20px;
  padding: 3px 0;
}

.assistant .message-bubble .checklist-item .check-icon {
  margin-right: 6px;
  font-size: 14px;
}

.assistant .message-bubble .checklist-item.checked {
  color: var(--gray-500);
}

.assistant .message-bubble details.collapsible-section {
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  margin: 12px 0;
  overflow: hidden;
}

.assistant .message-bubble summary.collapsible-header {
  padding: 10px 14px;
  background: var(--gray-50);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--gray-700);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}

.assistant .message-bubble summary.collapsible-header:hover {
  background: var(--gray-100);
}

.assistant .message-bubble summary.collapsible-header::before {
  content: '\25B6';
  font-size: 10px;
  transition: transform 0.2s;
}

.assistant .message-bubble details.collapsible-section[open] > summary.collapsible-header::before {
  transform: rotate(90deg);
}

.assistant .message-bubble details.collapsible-section > :not(summary) {
  padding: 0 14px;
}

.export-actions {
  display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap;
}
.export-btn {
  padding: 4px 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 11px;
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  display: flex; align-items: center; gap: 4px;
}
.export-btn:hover { background: var(--blue-50); border-color: var(--blue-500); color: var(--blue-600); }
.quick-actions {
  display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap;
}
.quick-action-btn {
  padding: 4px 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 11px;
  color: var(--gray-600);
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  display: flex; align-items: center; gap: 4px;
}
.quick-action-btn:hover { background: #f0f9ff; border-color: var(--blue-400); color: var(--blue-600); }
.quick-action-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.comparison-wrapper { margin-top: 8px; }
.comparison-toggle-bar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.comparison-toggle-btn {
  padding: 4px 12px; background: var(--blue-50); border: 1px solid var(--blue-300);
  border-radius: 6px; font-size: 11px; color: var(--blue-700); cursor: pointer;
  font-family: inherit; transition: all 0.15s;
}
.comparison-toggle-btn:hover { background: var(--blue-100); border-color: var(--blue-500); }
.comparison-toggle-btn.active { background: var(--blue-600); color: white; border-color: var(--blue-600); }
.comparison-card {
  border: 1px solid var(--gray-200); border-radius: 8px; overflow: hidden;
  background: white;
}
.comparison-header {
  display: grid; grid-template-columns: 200px 1fr 1fr; background: var(--gray-800);
  color: white; font-weight: 600; font-size: 13px;
}
.comparison-header-cell { padding: 10px 14px; }
.comparison-header-cell:not(:first-child) { border-left: 1px solid rgba(255,255,255,0.15); }
.comparison-row {
  display: grid; grid-template-columns: 200px 1fr 1fr;
  border-top: 1px solid var(--gray-100);
}
.comparison-row:nth-child(even) { background: var(--gray-50); }
.comparison-row.has-diff { background: #fffbeb; }
.comparison-row:nth-child(even).has-diff { background: #fef3c7; }
.comparison-cell {
  padding: 8px 14px; font-size: 13px; line-height: 1.5; color: var(--gray-700);
}
.comparison-cell:not(:first-child) { border-left: 1px solid var(--gray-100); }
.comparison-cell.label-cell { font-weight: 600; color: var(--gray-900); background: var(--gray-50); }
.comparison-cell.diff-cell { font-weight: 500; }

.app-container {
  display: flex;
}

.app-container.panel-open .chat-main {
  transition: flex 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.doc-panel {
  width: 0;
  min-width: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-left: 1px solid var(--gray-200);
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1), min-width 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
  position: relative;
}

.app-container.panel-open .doc-panel {
  width: 42%;
  min-width: 340px;
  opacity: 1;
}

.app-container.panel-expanded .doc-panel {
  width: 70%;
  min-width: 500px;
}

.doc-panel-resize-handle {
  width: 0;
  cursor: col-resize;
  background: transparent;
  position: relative;
  z-index: 10;
  flex-shrink: 0;
  transition: width 0.3s ease;
}

.app-container.panel-open .doc-panel-resize-handle {
  width: 6px;
}

.doc-panel-resize-handle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 40px;
  border-radius: 4px;
  background: var(--gray-300);
  opacity: 0;
  transition: opacity 0.2s;
}

.doc-panel-resize-handle:hover::after,
.doc-panel-resize-handle.dragging::after {
  opacity: 1;
}

.doc-panel-resize-handle:hover,
.doc-panel-resize-handle.dragging {
  background: var(--gray-100);
}

.doc-panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  min-height: 52px;
  background: var(--white);
}

.doc-panel-title-area {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex-shrink: 1;
}

.doc-panel-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.doc-panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-panel-tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  flex: 1;
  min-width: 0;
  scrollbar-width: none;
}

.doc-panel-tabs::-webkit-scrollbar { display: none; }

.doc-panel-tab {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  color: var(--gray-500);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 4px;
}

.doc-panel-tab:hover {
  background: var(--blue-50);
  border-color: var(--blue-300);
  color: var(--blue-600);
}

.doc-panel-tab.active {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: var(--white);
}

.doc-panel-tab-close {
  font-size: 14px;
  line-height: 1;
  opacity: 0.6;
  cursor: pointer;
  margin-left: 2px;
}

.doc-panel-tab-close:hover { opacity: 1; }

.doc-panel-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  align-items: center;
}

.doc-panel-action-btn {
  padding: 4px 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 11px;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  white-space: nowrap;
}

.doc-panel-action-btn:hover {
  background: var(--blue-50);
  border-color: var(--blue-500);
  color: var(--blue-600);
}

.doc-panel-close-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 18px;
  color: var(--gray-500);
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1;
}

.doc-panel-close-btn:hover {
  background: #fef2f2;
  border-color: #fca5a5;
  color: #dc2626;
}

.doc-panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-800);
}

.doc-panel-content h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--blue-100);
  line-height: 1.3;
}

.doc-panel-content h1:first-child { margin-top: 0; }

.doc-panel-content h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 24px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--gray-150, #e8e8e8);
  line-height: 1.3;
}

.doc-panel-content h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-800);
  margin: 20px 0 8px;
  line-height: 1.4;
}

.doc-panel-content h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-700);
  margin: 16px 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.doc-panel-content p {
  margin-bottom: 14px;
}

.doc-panel-content ul, .doc-panel-content ol {
  padding-left: 28px;
  margin-bottom: 14px;
}

.doc-panel-content li {
  margin-bottom: 6px;
  line-height: 1.7;
}

.doc-panel-content strong {
  font-weight: 700;
  color: var(--gray-900);
}

.doc-panel-content blockquote {
  border-left: 3px solid var(--blue-400);
  background: var(--blue-50);
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 0 8px 8px 0;
  color: var(--gray-700);
}

.doc-panel-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
}

.doc-panel-content th {
  background: var(--gray-800);
  color: var(--white);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
}

.doc-panel-content td {
  padding: 10px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

.doc-panel-content tr:nth-child(even) td {
  background: var(--gray-50);
}

.doc-panel-content code {
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.doc-panel-content pre {
  background: var(--gray-50);
  padding: 14px 18px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 14px 0;
  border: 1px solid var(--gray-200);
}

.doc-panel-content pre code {
  background: transparent;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
}

.doc-panel-content hr {
  border: none;
  border-top: 2px solid var(--gray-200);
  margin: 24px 0;
}

.open-in-panel-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid var(--blue-300);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-700);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  margin-top: 8px;
}

.open-in-panel-btn:hover {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  border-color: var(--blue-500);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59,130,246,0.15);
}

.open-in-panel-btn .panel-btn-icon {
  font-size: 14px;
}

.doc-panel-mobile-back {
  display: none;
}

/* Mobile doc panel: see MOBILE-OPTIMIZED EXPERIENCE section */

.user-msg-actions {
  display: flex; gap: 4px; margin-top: 4px; justify-content: flex-end; opacity: 0; transition: opacity 0.15s;
}
.message-group.user:hover .user-msg-actions { opacity: 1; }
.user-msg-action {
  background: none; border: none; cursor: pointer; padding: 2px 6px; font-size: 12px; color: var(--gray-400);
  border-radius: 4px; display: flex; align-items: center; gap: 3px; transition: color 0.15s, background 0.15s;
}
.user-msg-action:hover { color: var(--blue-600); background: rgba(59,130,246,0.1); }

.answer-actions {
  display: flex; gap: 6px; margin-top: 6px; align-items: center;
}
.answer-action-btn {
  background: none; border: 1px solid var(--gray-200); cursor: pointer; padding: 3px 8px;
  font-size: 12px; color: var(--gray-500); border-radius: 4px;
  display: flex; align-items: center; gap: 3px; transition: all 0.15s;
}
.answer-action-btn:hover { color: var(--blue-600); border-color: var(--blue-400); background: var(--blue-50); }
.answer-action-btn.active-up { color: #16a34a; border-color: #16a34a; background: rgba(22,163,74,0.08); }
.answer-action-btn.active-down { color: #dc2626; border-color: #dc2626; background: rgba(220,38,38,0.08); }
.answer-action-btn.bookmarked { color: #d97706; border-color: #d97706; background: rgba(217,119,6,0.08); }
.answer-action-btn.tts-loading { color: var(--blue-600); border-color: var(--blue-400); opacity: 0.7; pointer-events: none; }
.answer-action-btn.tts-playing { color: #16a34a; border-color: #16a34a; background: rgba(22,163,74,0.08); }
.answer-action-btn.tts-paused { color: #d97706; border-color: #d97706; background: rgba(217,119,6,0.08); }
@keyframes ttsPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.answer-action-btn.tts-loading .tts-icon { animation: ttsPulse 1.2s ease-in-out infinite; }
.tts-stop-icon { margin-left: 6px; cursor: pointer; opacity: 0.7; }
.tts-stop-icon:hover { opacity: 1; }

/* Inline Edit Mode */
.msg-edit-container {
  width: 100%;
}
.msg-edit-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--blue-400);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  line-height: 1.5;
  color: var(--gray-800);
  background: var(--white);
  resize: vertical;
  min-height: 60px;
  max-height: 200px;
  outline: none;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.msg-edit-btns {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  justify-content: flex-end;
}
.msg-edit-save {
  padding: 6px 16px;
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
}
.msg-edit-save:hover { background: var(--blue-700); }
.msg-edit-cancel {
  padding: 6px 16px;
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}
.msg-edit-cancel:hover { background: var(--gray-100); color: var(--gray-700); }

/* Regenerate Button */
.regenerate-bar {
  display: flex;
  justify-content: center;
  padding: 4px 0 8px;
}
.regenerate-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  background: var(--white);
  color: var(--gray-600);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.regenerate-btn:hover {
  color: var(--blue-600);
  border-color: var(--blue-400);
  background: var(--blue-50);
  box-shadow: var(--shadow-md);
}
.regenerate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.regenerate-icon {
  font-size: 14px;
  display: inline-block;
  transition: transform 0.3s ease;
}
.regenerate-btn:hover .regenerate-icon {
  transform: rotate(180deg);
}

/* Keyboard Shortcuts Help */
.shortcuts-help {
  position: fixed;
  bottom: 80px;
  right: 24px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  min-width: 240px;
  display: none;
}
.shortcuts-help.visible { display: block; }
.shortcuts-help-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.shortcuts-help-close {
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  color: var(--gray-400);
  padding: 0 2px;
}
.shortcuts-help-close:hover { color: var(--gray-700); }
.shortcut-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  font-size: 12px;
  color: var(--gray-600);
}
.shortcut-keys {
  display: flex;
  gap: 3px;
}
.shortcut-key {
  display: inline-block;
  padding: 2px 6px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-600);
  font-family: inherit;
  line-height: 1.4;
}

.bookmarks-section { margin-top: 8px; }
.bookmarks-label { font-size: 11px; font-weight: 600; color: var(--gray-400); text-transform: uppercase; letter-spacing: 0.5px; padding: 8px 16px 4px; }
.bookmark-item {
  padding: 8px 16px; cursor: pointer; font-size: 13px; color: var(--gray-600);
  display: flex; align-items: center; gap: 8px; transition: background 0.15s;
  border-bottom: 1px solid var(--gray-100);
}
.bookmark-item:hover { background: var(--gray-100); color: var(--gray-800); }
.bookmark-item .bookmark-pin { color: #d97706; font-size: 14px; flex-shrink: 0; }
.bookmark-item .bookmark-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.bookmark-item .bookmark-delete { 
  opacity: 0; background: none; border: none; color: var(--gray-500); cursor: pointer; font-size: 14px; padding: 2px;
  transition: opacity 0.15s;
}
.bookmark-item:hover .bookmark-delete { opacity: 1; }
.bookmark-item .bookmark-delete:hover { color: #dc2626; }

/* Input Area */
.chat-input-area {
  padding: 16px 24px 20px;
  background: var(--white);
  border-top: none;
}

.chat-input-wrapper {
  max-width: 820px;
  margin: 0 auto;
  display: flex; gap: 10px;
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: 22px;
  padding: 6px 6px 6px 4px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06), 0 0 0 0.5px rgba(0,0,0,0.02);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.chat-input-wrapper:focus-within {
  border-color: var(--blue-400);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.08), 0 4px 20px rgba(59,130,246,0.1);
}

.chat-input {
  flex: 1; padding: 10px 14px;
  border: none;
  border-radius: 16px;
  font-size: 14px;
  font-family: inherit;
  resize: none;
  min-height: 42px; max-height: 120px;
  transition: none;
  background: transparent;
}

.chat-input:focus {
  outline: none;
  border-color: transparent;
  box-shadow: none;
}

.send-btn {
  padding: 10px 18px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: var(--white);
  border: none;
  border-radius: 14px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
  font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  align-self: flex-end;
  box-shadow: 0 1px 3px rgba(37,99,235,0.25);
  letter-spacing: 0.01em;
}

.send-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 4px 12px rgba(37,99,235,0.35);
  transform: translateY(-1px);
}
.send-btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: 0 1px 3px rgba(37,99,235,0.2);
}
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

.upload-btn {
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 12px;
  font-size: 18px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-400);
  align-self: flex-end;
}
.upload-btn:hover { background: var(--gray-100); color: var(--blue-600); }
.upload-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.mic-btn {
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 12px;
  font-size: 18px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-400);
  position: relative;
  min-width: 42px;
  min-height: 42px;
  flex-shrink: 0;
  align-self: flex-end;
}
.mic-btn:hover { background: var(--gray-100); color: var(--blue-600); }
.mic-btn:active { transform: scale(0.95); }
.mic-btn.recording {
  background: var(--red-100);
  border-color: var(--red-500);
  color: var(--red-500);
  animation: micPulse 1.5s ease-in-out infinite;
}
.mic-btn.transcribing {
  opacity: 0.6;
  cursor: wait;
}
@keyframes micPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(239,68,68,0); }
}
.mic-timer {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--red-500);
  color: white;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 10px;
  line-height: 1.4;
  display: none;
}
.mic-btn.recording .mic-timer { display: block; }
.upload-status {
  font-size: 12px; color: var(--gray-500);
  text-align: center; padding: 6px 12px;
  max-width: 800px; margin: 0 auto;
  border-radius: 8px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  animation: extractPulse 2s ease-in-out infinite;
}
@keyframes extractPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.upload-status.success { color: var(--green-600); background: var(--green-100); border-color: var(--green-600); animation: none; }
.upload-status.error { color: var(--red-500); background: var(--red-100); border-color: var(--red-500); animation: none; }

.doc-indicator-panel {
  display: none;
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 8px;
  padding: 10px 14px;
  margin: 0 0 10px 0;
  font-size: 13px;
}
.doc-indicator-panel.visible {
  display: block;
}
.doc-indicator-title {
  color: var(--blue-600);
  font-weight: 600;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.doc-indicator-list {
  list-style: none;
  padding: 0;
  margin: 0 0 6px 0;
}
.doc-indicator-list li {
  color: var(--gray-600);
  padding: 3px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.doc-indicator-list li .doc-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.doc-indicator-list li .doc-status-dot.reading {
  background: #ecc94b;
  animation: docPulse 1s ease-in-out infinite;
}
.doc-indicator-list li .doc-status-dot.processing {
  background: #4299e1;
  animation: docPulse 1s ease-in-out infinite;
}
.doc-indicator-list li .doc-status-dot.ready {
  background: #48bb78;
}
@keyframes docPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.doc-indicator-list li .doc-status-label {
  font-size: 11px;
  font-weight: 600;
  margin-left: auto;
  padding: 1px 6px;
  border-radius: 4px;
}
.doc-indicator-list li .doc-status-label.reading {
  color: #ecc94b;
  background: rgba(236, 201, 75, 0.1);
}
.doc-indicator-list li .doc-status-label.processing {
  color: #4299e1;
  background: rgba(66, 153, 225, 0.1);
}
.doc-indicator-list li .doc-status-label.ready {
  color: #48bb78;
  background: rgba(72, 187, 120, 0.1);
}
.doc-indicator-note {
  color: var(--gray-400);
  font-size: 11px;
  font-style: italic;
  margin-top: 4px;
}
.pending-files-bar {
  display: none;
  padding: 6px 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  margin: 0 auto;
  max-width: 820px;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}
.pending-files-bar.visible {
  display: flex;
}
.pending-file-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 14px;
  padding: 3px 10px 3px 8px;
  font-size: 12px;
  color: var(--blue-600);
  max-width: 200px;
}
.pending-file-chip .chip-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pending-file-chip .chip-remove {
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  font-size: 14px;
  padding: 0 0 0 2px;
  line-height: 1;
}
.pending-file-chip .chip-remove:hover {
  color: var(--red-500);
}
.pending-files-bar .pending-label {
  font-size: 11px;
  color: var(--gray-400);
  margin-right: 4px;
}
.doc-upload-card {
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 8px;
}
.doc-upload-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-600);
  font-weight: 600;
  font-size: 14px;
}
.doc-upload-card-header .doc-icon {
  font-size: 18px;
}
.doc-upload-card-files {
  margin: 8px 0 0 0;
  padding: 0;
  list-style: none;
}
.doc-upload-card-files li {
  color: var(--gray-600);
  font-size: 13px;
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.doc-upload-card-files li .doc-file-icon {
  color: var(--green-600);
}
.doc-upload-card-files li .doc-file-partial {
  color: var(--amber-600);
  font-size: 11px;
  font-weight: 600;
}
.doc-upload-card-toggle {
  background: none;
  border: 1px solid var(--gray-200);
  color: var(--gray-500);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.2s;
}
.doc-upload-card-toggle:hover {
  color: var(--blue-600);
  border-color: var(--blue-400);
}
.doc-upload-card-raw {
  display: none;
  max-height: 300px;
  overflow-y: auto;
  background: var(--gray-100);
  border-radius: 4px;
  padding: 8px 10px;
  margin-top: 8px;
  font-size: 11px;
  color: var(--gray-600);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.4;
}
.doc-upload-card-raw.expanded {
  display: block;
}

.doc-retention-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--gray-700);
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}
.doc-retention-banner .retention-icon {
  font-size: 15px;
  flex-shrink: 0;
}
.doc-retention-banner .retention-text {
  flex: 1;
}
.doc-retention-banner .retention-count {
  font-weight: 600;
  color: var(--blue-600);
}
.doc-retention-banner.expired {
  background: var(--amber-100);
  border-color: #fde68a;
  color: var(--gray-700);
}
.doc-retention-banner.expired .retention-count {
  color: var(--amber-700);
}
.retention-repin-btn {
  padding: 3px 10px; background: var(--blue-600); color: white; border: none;
  border-radius: 5px; font-size: 11px; font-weight: 600; cursor: pointer;
  font-family: inherit; white-space: nowrap; transition: background 0.15s;
  flex-shrink: 0;
}
.retention-repin-btn:hover { background: var(--blue-700); }
.doc-context-chip {
  display: none; align-items: center; gap: 6px; padding: 4px 12px;
  background: #ecfdf5; border: 1px solid #a7f3d0; border-radius: 6px;
  font-size: 12px; color: #047857; font-weight: 500; margin-bottom: 4px;
}
.doc-context-chip.visible { display: inline-flex; }
.doc-context-dot {
  width: 7px; height: 7px; border-radius: 50%; background: #10b981;
  animation: docPulse 2s ease-in-out infinite;
}
@keyframes docPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.typing-indicator {
  display: none;
  padding: 14px 18px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  animation: messageSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.typing-indicator::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(59,130,246,0.04) 40%, rgba(99,102,241,0.03) 60%, transparent 100%);
  background-size: 200% 100%;
  animation: typingShimmer 2s ease-in-out infinite;
  pointer-events: none;
}

.typing-indicator.show { display: block; }

.typing-dots {
  display: flex; gap: 5px; align-items: center;
  position: relative;
  z-index: 1;
}

.typing-dots span {
  width: 7px; height: 7px;
  background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.16s; }
.typing-dots span:nth-child(3) { animation-delay: 0.32s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6) translateY(0); opacity: 0.3; }
  40% { transform: scale(1) translateY(-4px); opacity: 1; }
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes progressSpinnerRotate {
  to { transform: rotate(360deg); }
}

@keyframes progressCheckPop {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes progressStepSlideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

.progress-panel {
  padding: 16px 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
  animation: messageSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  min-width: 240px;
  max-width: 420px;
  transition: opacity 0.3s ease, transform 0.3s ease, max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--blue-500), var(--blue-400));
  border-radius: 3px 0 0 3px;
}

.progress-panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.progress-panel-header-dot {
  width: 6px;
  height: 6px;
  background: var(--blue-500);
  border-radius: 50%;
  animation: pulse-dot 1.4s infinite ease-in-out;
}

.progress-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  animation: progressStepSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
}

.progress-step-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.progress-step-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--blue-500);
  border-radius: 50%;
  animation: progressSpinnerRotate 0.7s linear infinite;
}

.progress-step-check {
  display: none;
  width: 18px;
  height: 18px;
  color: var(--green-600);
}

.progress-step-check svg {
  width: 18px;
  height: 18px;
}

.progress-step.completed .progress-step-spinner {
  display: none;
}

.progress-step.completed .progress-step-check {
  display: flex;
  animation: progressCheckPop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.progress-step-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  line-height: 1.3;
}

.progress-step.completed .progress-step-label {
  color: var(--gray-500);
}

.progress-step-detail {
  font-size: 11px;
  font-weight: 400;
  color: var(--gray-400);
  margin-left: auto;
  white-space: nowrap;
}

.progress-panel.collapsing {
  opacity: 0;
  transform: translateY(-8px) scale(0.98);
  max-height: 0 !important;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
  margin-bottom: 0;
  overflow: hidden;
}

.message-group.msg-new {
  animation: messageSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.skeleton-bubble {
  padding: 16px 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  min-width: 240px;
  max-width: 70%;
}

.skeleton-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--gray-100) 25%, rgba(59,130,246,0.04) 50%, var(--gray-100) 75%);
  background-size: 600px 100%;
  animation: shimmerSlide 2s ease-in-out infinite;
  margin-bottom: 10px;
}

.skeleton-line:last-child { margin-bottom: 0; }
.skeleton-line.short { width: 60%; }
.skeleton-line.medium { width: 85%; }
.skeleton-line.long { width: 95%; }

.typing-status {
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.error-toast {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  background: var(--red-600); color: var(--white);
  padding: 10px 20px; border-radius: var(--radius);
  font-size: 13px; z-index: 100;
  box-shadow: var(--shadow-lg);
  display: none;
}

.error-toast.show { display: block; }

.success-toast {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  background: var(--green-600); color: var(--white);
  padding: 10px 20px; border-radius: var(--radius);
  font-size: 13px; z-index: 100;
  box-shadow: var(--shadow-lg);
  display: none;
}
.success-toast.show { display: block; }

.profile-btn {
  width: 100%; padding: 8px;
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 13px; cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  margin-bottom: 8px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.profile-btn:hover {
  background: var(--gray-100);
  color: var(--gray-700);
  border-color: var(--gray-300);
  transform: translateY(-0.5px);
}

.profile-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: none; align-items: center; justify-content: center;
  z-index: 200;
}

@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  .profile-modal-overlay {
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
}
.profile-modal-overlay.show { display: flex; }

.profile-modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%; max-width: 540px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.08);
  max-height: 85vh;
  overflow-y: auto;
  animation: modalScaleIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.profile-modal h3 {
  font-size: 18px; font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.profile-modal .close-btn {
  background: none; border: none;
  font-size: 20px; cursor: pointer;
  color: var(--gray-400);
  padding: 4px 8px; border-radius: var(--radius);
  transition: all var(--transition);
}
.profile-modal .close-btn:hover { color: var(--gray-700); background: var(--gray-100); }

.profile-form .form-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin-bottom: 16px;
}
.profile-form .form-row.full { grid-template-columns: 1fr; }
.profile-form .form-group { margin-bottom: 0; }
.profile-form .form-group label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--gray-700); margin-bottom: 6px;
}
.profile-form .form-group input,
.profile-form .form-group select {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px; font-family: inherit;
  transition: border-color var(--transition);
}
.profile-form .form-group input:focus,
.profile-form .form-group select:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.profile-form .form-group .field-hint {
  font-size: 11px; color: var(--gray-400); margin-top: 4px;
}
.profile-form .form-actions {
  display: flex; gap: 10px; justify-content: flex-end;
  margin-top: 20px; padding-top: 16px;
  border-top: 1px solid var(--gray-200);
}
.profile-form .btn-save {
  padding: 10px 24px;
  background: var(--blue-600); color: var(--white);
  border: none; border-radius: var(--radius);
  font-size: 14px; font-weight: 600;
  cursor: pointer; font-family: inherit;
  transition: background var(--transition);
}
.profile-form .btn-save:hover { background: var(--blue-700); }
.profile-form .btn-save:disabled { opacity: 0.6; cursor: not-allowed; }
.profile-form .btn-cancel {
  padding: 10px 20px;
  background: var(--white); color: var(--gray-700);
  border: 1px solid var(--gray-300); border-radius: var(--radius);
  font-size: 14px; font-weight: 500;
  cursor: pointer; font-family: inherit;
  transition: all var(--transition);
}
.profile-form .btn-cancel:hover { background: var(--gray-50); }

/* Format Toggle */
.format-toggle {
  position: relative;
}
.format-toggle-btn {
  padding: 8px 12px;
  background: var(--gray-50);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-600);
  font-family: inherit;
  white-space: nowrap;
  display: flex; align-items: center; gap: 4px;
}
.format-toggle-btn:hover { background: var(--blue-50); border-color: var(--blue-500); color: var(--blue-600); }
.format-toggle-btn.active { background: var(--blue-50); border-color: var(--blue-500); color: var(--blue-600); }
.format-dropdown {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 20;
  min-width: 200px;
  display: none;
}
.format-dropdown.open { display: block; }
.format-option {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  display: flex; flex-direction: column; gap: 2px;
  transition: background var(--transition);
}
.format-option:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.format-option:last-child { border-radius: 0 0 var(--radius) var(--radius); }
.format-option:hover { background: var(--blue-50); }
.format-option.selected { background: var(--blue-50); color: var(--blue-600); }
.format-option .format-label { font-weight: 500; }
.format-option .format-desc { font-size: 11px; color: var(--gray-500); }

/* Quick Actions */
.quick-actions-bar {
  max-width: 820px;
  margin: 0 auto 8px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.template-category {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 4px;
  background: var(--white);
  overflow: hidden;
}
.template-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--gray-50);
  border: none;
  width: 100%;
  font-family: inherit;
  transition: all var(--transition);
  text-align: left;
}
.template-category-header:hover {
  background: var(--blue-50);
  color: var(--blue-600);
}
.template-category-header .cat-chevron {
  font-size: 10px;
  transition: transform 0.2s;
  color: var(--gray-400);
}
.template-category.open .cat-chevron {
  transform: rotate(90deg);
}
.template-category-body {
  display: none;
  padding: 6px 8px 8px;
  gap: 5px;
  flex-wrap: wrap;
}
.template-category.open .template-category-body {
  display: flex;
}
.quick-action-btn {
  padding: 5px 11px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  font-size: 11px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  color: var(--gray-600);
  white-space: nowrap;
}
.quick-action-btn:hover {
  background: var(--blue-50);
  border-color: var(--blue-500);
  color: var(--blue-600);
}
.quick-actions-toggle {
  padding: 6px 10px;
  background: none;
  border: 1px dashed var(--gray-300);
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  color: var(--gray-400);
  font-family: inherit;
  transition: all var(--transition);
  align-self: flex-start;
}
.quick-actions-toggle:hover { border-color: var(--blue-400); color: var(--blue-500); }

.shortcut-btn-wrap {
  display: inline-flex;
  align-items: center;
  position: relative;
}
.shortcut-btn-wrap .quick-action-btn {
  padding-right: 22px;
}
.shortcut-actions {
  display: none;
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  gap: 1px;
}
.shortcut-btn-wrap:hover .shortcut-actions {
  display: flex;
}
.shortcut-action {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 10px;
  padding: 1px 3px;
  color: var(--gray-400);
  line-height: 1;
  border-radius: 3px;
}
.shortcut-action:hover {
  color: var(--blue-600);
  background: var(--blue-50);
}
.shortcut-action.del:hover {
  color: var(--red-500);
  background: var(--red-100);
}
.save-shortcut-btn {
  padding: 4px 10px;
  background: none;
  border: 1px dashed var(--gray-300);
  border-radius: 20px;
  font-size: 11px;
  cursor: pointer;
  color: var(--gray-400);
  font-family: inherit;
  transition: all var(--transition);
  white-space: nowrap;
}
.save-shortcut-btn:hover {
  border-color: var(--blue-400);
  color: var(--blue-500);
}
.shortcut-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  .shortcut-modal-overlay {
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
}
.shortcut-modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.08);
  animation: modalScaleIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.shortcut-modal h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--gray-800);
}
.shortcut-modal .form-group {
  margin-bottom: 14px;
}
.shortcut-modal .form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 5px;
}
.shortcut-modal .form-group input,
.shortcut-modal .form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
}
.shortcut-modal .form-group textarea {
  min-height: 80px;
  resize: vertical;
}
.shortcut-modal .form-group input:focus,
.shortcut-modal .form-group textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.shortcut-modal-btns {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 16px;
}
.shortcut-modal-btns button {
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-700);
  transition: all var(--transition);
}
.shortcut-modal-btns button.primary {
  background: var(--blue-600);
  color: var(--white);
  border-color: var(--blue-600);
}
.shortcut-modal-btns button.primary:hover {
  background: var(--blue-700);
}
.shortcut-modal-btns button:not(.primary):hover {
  background: var(--gray-100);
}

/* Conversation Search */
.session-search {
  padding: 0 16px 8px;
}
.session-search input {
  width: 100%;
  padding: 8px 10px 8px 32px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--gray-700);
  font-size: 12px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}
.session-search input::placeholder { color: var(--gray-400); }
.session-search input:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,130,246,0.08); }
.session-search-wrap {
  position: relative;
}
.session-search-wrap .search-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  color: var(--gray-500);
  pointer-events: none;
}

/* Message Edit Button */
.msg-edit-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  cursor: pointer;
  color: var(--gray-400);
  opacity: 0;
  transition: opacity 0.15s;
  font-family: inherit;
}
.message-group.user:hover .msg-edit-btn { opacity: 1; }
.msg-edit-btn:hover { color: var(--blue-600); border-color: var(--blue-500); }

/* Collapsible Tips */
.welcome-tips-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  font-size: 12px;
  color: var(--gray-500);
  cursor: pointer;
  font-family: inherit;
  margin-top: 8px;
  transition: all var(--transition);
}
.welcome-tips-toggle:hover { border-color: var(--blue-400); color: var(--blue-600); }
.welcome-tips-collapsible {
  display: grid;
  grid-template-rows: 0fr;
  margin-top: 10px;
  transition: grid-template-rows 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}
.welcome-tips-collapsible > * {
  overflow: hidden;
}
.welcome-tips-collapsible.open {
  grid-template-rows: 1fr;
}

/* Print Button */
.export-btn.print-btn { }

/* Session Tags */
.session-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.session-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--blue-50);
  color: var(--blue-600);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.session-tag-remove {
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  opacity: 0.6;
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}
.session-tag-remove:hover { opacity: 1; }
.tag-add-btn {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: transparent;
  border: 1px dashed var(--gray-300);
  border-radius: 12px;
  font-size: 11px;
  color: var(--gray-400);
  cursor: pointer;
  transition: all var(--transition);
}
.tag-add-btn:hover { border-color: var(--blue-400); color: var(--blue-500); background: var(--blue-50); }
.tag-input-inline {
  width: 80px;
  padding: 3px 8px;
  border: 1px solid var(--blue-500);
  border-radius: 12px;
  font-size: 11px;
  background: var(--white);
  color: var(--gray-800);
  outline: none;
  font-family: inherit;
}
.tag-filter-bar {
  padding: 6px 16px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
}
.tag-filter-btn {
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--gray-200);
  background: none;
  color: var(--gray-500);
  font-family: inherit;
  transition: all var(--transition);
}
.tag-filter-btn:hover { border-color: var(--gray-300); color: var(--gray-700); }
.tag-filter-btn.active { background: var(--blue-600); border-color: var(--blue-600); color: var(--white); }

/* Print styles */
@media print {
  body { background: white !important; overflow: visible !important; }
  .sidebar, .sidebar-overlay, .sidebar-toggle-btn, .chat-input-area,
  .chat-header, .login-overlay, .error-toast, .success-toast,
  .export-actions, .answer-actions, .follow-ups, .quick-actions,
  .user-msg-actions, .profile-modal-overlay, .comparison-toggle-bar,
  .quick-actions-bar, .format-toggle, .doc-panel, .doc-panel-resize-handle,
  .open-in-panel-btn { display: none !important; }
  .app-container { display: block !important; }
  .chat-main { margin: 0 !important; padding: 0 !important; }
  .chat-messages { height: auto !important; overflow: visible !important; padding: 0 !important; }
  .message-group { break-inside: avoid; page-break-inside: avoid; }
  .message-group.user { margin-bottom: 8px; }
  .message-bubble { box-shadow: none !important; border: 1px solid #ddd; }
  .summary-box { border: 2px solid #333 !important; background: #f5f5f5 !important; }
}

/* Embed mode */
body.embed-mode .sidebar { display: none; }
body.embed-mode .chat-header { display: none; }
body.embed-mode .sidebar-toggle-btn { display: none !important; }
body.embed-mode .doc-panel { display: none; }
body.embed-mode .doc-panel-resize-handle { display: none; }
body.embed-mode .open-in-panel-btn { display: none; }

/* Mobile sidebar overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 49;
  opacity: 0;
  transition: opacity 0.3s ease;
}

@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  .sidebar-overlay {
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

/* Responsive (see MOBILE-OPTIMIZED EXPERIENCE section at bottom) */

.doc-intelligence-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  margin-bottom: 10px;
  background: var(--blue-50, #eff6ff);
  border: 1px solid var(--blue-300, #93c5fd);
  border-radius: 6px;
  font-size: 13px;
  color: var(--blue-700, #1d4ed8);
  line-height: 1.4;
}
.doc-intel-icon {
  font-size: 15px;
}
.doc-intel-types {
  color: var(--blue-500, #3b82f6);
  font-size: 12px;
}
.doc-intel-conf {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 4px;
}
.doc-intel-conf.high {
  background: var(--green-100, #dcfce7);
  color: var(--green-700, #15803d);
}
.doc-intel-conf.medium {
  background: var(--amber-100, #fef3c7);
  color: var(--amber-700, #b45309);
}

@media (prefers-reduced-motion: reduce) {
  .message-group.msg-new,
  .typing-indicator,
  .skeleton-bubble,
  .welcome-example-btn,
  .send-btn,
  .follow-up-chip,
  .login-card,
  .welcome-message {
    animation: none;
  }

  .login-overlay {
    animation: none;
    background-size: 100% 100%;
  }

  .login-overlay::after {
    animation: none;
  }

  .typing-indicator::after,
  .skeleton-line {
    animation: none;
  }

  .typing-dots span {
    animation: none;
    opacity: 0.6;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* ============================================ */
/* PREMIUM POLISH                                */
/* ============================================ */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

.theme-toggle-btn {
  width: 100%; padding: 8px;
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 13px; cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  margin-bottom: 8px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.theme-toggle-btn:hover {
  background: var(--blue-50);
  color: var(--blue-600);
  border-color: var(--blue-200);
}
.theme-toggle-btn svg { width: 16px; height: 16px; }
.theme-icon-sun { display: none; }
.theme-icon-moon { display: inline; }
body.dark-mode .theme-icon-sun { display: inline; }
body.dark-mode .theme-icon-moon { display: none; }

body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
  transition: background-color 0.3s ease, color 0.2s ease, border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease !important;
}

/* ============================================ */
/* DARK MODE                                     */
/* ============================================ */

body.dark-mode {
  --white: #17171a;
  --gray-50: #1c1c21;
  --gray-100: #222228;
  --gray-200: #2c2c35;
  --gray-300: #3a3a45;
  --gray-400: #5c5c69;
  --gray-500: #8a8a97;
  --gray-600: #a8a8b5;
  --gray-700: #c4c4cf;
  --gray-800: #dcdce5;
  --gray-900: #eeeef5;

  --blue-50: rgba(59,130,246,0.1);
  --blue-100: rgba(59,130,246,0.16);
  --blue-200: rgba(59,130,246,0.22);
  --green-50: rgba(34,197,94,0.1);
  --green-100: rgba(34,197,94,0.16);
  --green-200: rgba(34,197,94,0.22);
  --red-50: rgba(239,68,68,0.1);
  --red-100: rgba(239,68,68,0.16);
  --red-200: rgba(239,68,68,0.22);
  --amber-50: rgba(245,158,11,0.1);
  --amber-100: rgba(245,158,11,0.16);
  --amber-200: rgba(245,158,11,0.22);
  --purple-50: rgba(168,85,247,0.1);
  --purple-100: rgba(168,85,247,0.16);
  --teal-50: rgba(20,184,166,0.1);
  --teal-100: rgba(20,184,166,0.16);
  --indigo-50: rgba(99,102,241,0.1);
  --indigo-100: rgba(99,102,241,0.16);
  --rose-50: rgba(244,63,94,0.1);
  --rose-100: rgba(244,63,94,0.16);
  --cyan-50: rgba(6,182,212,0.1);
  --cyan-100: rgba(6,182,212,0.16);
  --emerald-50: rgba(16,185,129,0.1);
  --emerald-100: rgba(16,185,129,0.16);

  --glass-bg: rgba(22,22,24,0.85);
  --glass-border: rgba(255,255,255,0.06);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5), 0 2px 4px -2px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.6), 0 4px 6px -4px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.6), 0 8px 10px -6px rgba(0,0,0,0.4);
  --shadow-glow-blue: 0 0 20px rgba(59,130,246,0.25);

  background: #0f0f12;
  color: var(--gray-800);
  color-scheme: dark;
}

body.dark-mode .btn-primary,
body.dark-mode .new-chat-btn,
body.dark-mode .send-btn,
body.dark-mode .user .message-bubble,
body.dark-mode .user .message-avatar,
body.dark-mode .assistant .message-avatar,
body.dark-mode .badge-count,
body.dark-mode .btn-success,
body.dark-mode .btn-warning,
body.dark-mode .comparison-header,
body.dark-mode .retention-repin-btn,
body.dark-mode .mic-timer,
body.dark-mode .profile-form .btn-save,
body.dark-mode .shortcut-modal-btns button.primary,
body.dark-mode .comparison-toggle-btn.active,
body.dark-mode .tag-filter-btn.active,
body.dark-mode .error-toast,
body.dark-mode .success-toast,
body.dark-mode .msg-edit-save {
  color: #ffffff;
}
body.dark-mode .btn-spinner {
  border-top-color: #ffffff;
}

body.dark-mode .sidebar {
  background: #131316;
  border-right-color: #222228;
}

body.dark-mode .sidebar-header {
  border-bottom-color: #222228;
}

body.dark-mode .session-item.active {
  background: rgba(59,130,246,0.1);
  border-left-color: #60a5fa;
  box-shadow: none;
}

body.dark-mode .session-item:hover {
  background: #1c1c21;
  border-left-color: #3a3a45;
}

body.dark-mode .folder-header .folder-count {
  background: #2c2c35;
}

body.dark-mode .sidebar-nav-links {
  border-top-color: #222228;
}

body.dark-mode .sidebar-footer {
  border-top-color: #222228;
}

body.dark-mode .new-chat-btn {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 2px 10px rgba(37,99,235,0.4);
}
body.dark-mode .new-chat-btn:hover {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  box-shadow: 0 4px 16px rgba(59,130,246,0.45);
}

body.dark-mode .chat-main {
  background: #0f0f12;
}

body.dark-mode .chat-header {
  background: #131316;
  border-bottom-color: #222228;
}

body.dark-mode .chat-messages {
  background: #0f0f12;
}

body.dark-mode .assistant .message-bubble {
  background: #1a1a1f;
  border-color: #2c2c35;
  color: #dcdce5;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25), 0 0 0 0.5px rgba(255,255,255,0.03);
}

body.dark-mode .user .message-bubble {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 2px 10px rgba(37,99,235,0.35);
}

body.dark-mode .assistant .message-avatar {
  background: linear-gradient(135deg, #2c2c35, #3a3a45);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

body.dark-mode .user .message-avatar {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 2px 6px rgba(37,99,235,0.35);
}

body.dark-mode .assistant .message-bubble code {
  background: #222228;
  color: #e8b4b8;
}

body.dark-mode .assistant .message-bubble pre {
  background: #0d0d10;
  border-color: #2c2c35;
}

body.dark-mode .assistant .message-bubble pre code {
  color: #c9d1d9;
}

body.dark-mode .code-block-wrapper {
  border-color: #2c2c35;
}

body.dark-mode .code-block-header {
  background: #1a1a1f;
  border-bottom-color: #2c2c35;
}

body.dark-mode .code-copy-btn {
  border-color: #3a3a45;
  color: #8a8a97;
}

body.dark-mode .code-copy-btn:hover {
  background: #222228;
  color: #c4c4cf;
  border-color: #5c5c69;
}

body.dark-mode .hljs { background: #0d0d10; color: #c9d1d9; }
body.dark-mode .hljs-comment,
body.dark-mode .hljs-quote { color: #6e7681; font-style: italic; }
body.dark-mode .hljs-keyword,
body.dark-mode .hljs-selector-tag,
body.dark-mode .hljs-type { color: #ff7b72; }
body.dark-mode .hljs-string,
body.dark-mode .hljs-addition { color: #a5d6ff; }
body.dark-mode .hljs-number,
body.dark-mode .hljs-literal { color: #79c0ff; }
body.dark-mode .hljs-built_in { color: #d2a8ff; }
body.dark-mode .hljs-function,
body.dark-mode .hljs-title { color: #d2a8ff; }
body.dark-mode .hljs-attr,
body.dark-mode .hljs-attribute { color: #79c0ff; }
body.dark-mode .hljs-variable,
body.dark-mode .hljs-template-variable,
body.dark-mode .hljs-name { color: #ffa657; }
body.dark-mode .hljs-symbol,
body.dark-mode .hljs-bullet { color: #ffa657; }
body.dark-mode .hljs-meta { color: #6e7681; }
body.dark-mode .hljs-deletion { color: #ffa198; background: rgba(255,129,130,0.1); }
body.dark-mode .hljs-section { color: #79c0ff; font-weight: 700; }
body.dark-mode .hljs-tag { color: #7ee787; }
body.dark-mode .hljs-selector-id,
body.dark-mode .hljs-selector-class { color: #d2a8ff; }
body.dark-mode .hljs-emphasis { font-style: italic; }
body.dark-mode .hljs-strong { font-weight: 700; }

body.dark-mode .assistant .message-bubble th {
  background: #1c1c21;
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble th:hover {
  background: #222228;
}

body.dark-mode .assistant .message-bubble .table-wrapper {
  border-color: #2c2c35;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

body.dark-mode .assistant .message-bubble td {
  color: #a8a8b5;
  border-bottom-color: #2c2c35;
}

body.dark-mode .assistant .message-bubble tr:nth-child(even) td {
  background: rgba(255,255,255,0.02);
}

body.dark-mode .assistant .message-bubble tr:hover td {
  background: rgba(59,130,246,0.08);
}

body.dark-mode .assistant .message-bubble blockquote {
  background: rgba(59,130,246,0.08);
  border-left-color: var(--blue-500);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble blockquote.summary-box {
  background: linear-gradient(135deg, rgba(59,130,246,0.1) 0%, rgba(99,102,241,0.08) 100%);
  border-left-color: var(--blue-500);
  color: #dcdce5;
}

body.dark-mode .assistant .message-bubble blockquote.callout-tip {
  background: linear-gradient(135deg, rgba(16,185,129,0.1) 0%, rgba(52,211,153,0.08) 100%);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble blockquote.callout-warning {
  background: linear-gradient(135deg, rgba(245,158,11,0.1) 0%, rgba(251,191,36,0.08) 100%);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble blockquote.callout-key {
  background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(129,140,248,0.08) 100%);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble blockquote.callout-note {
  background: linear-gradient(135deg, rgba(139,92,246,0.1) 0%, rgba(167,139,250,0.08) 100%);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble blockquote.callout-example {
  background: linear-gradient(135deg, rgba(6,182,212,0.1) 0%, rgba(34,211,238,0.08) 100%);
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble details.collapsible-section {
  border-color: #2c2c35;
}

body.dark-mode .assistant .message-bubble summary.collapsible-header {
  background: #1c1c21;
  color: #c4c4cf;
}

body.dark-mode .assistant .message-bubble summary.collapsible-header:hover {
  background: #222228;
}

body.dark-mode .assistant .message-bubble hr {
  border-top-color: #2c2c35;
}

body.dark-mode .assistant .message-bubble h1 {
  color: #eeeef5;
  border-bottom-color: rgba(59,130,246,0.2);
}

body.dark-mode .assistant .message-bubble h2 {
  color: #eeeef5;
  border-bottom-color: #2c2c35;
}

body.dark-mode .assistant .message-bubble h3 { color: #dcdce5; }
body.dark-mode .assistant .message-bubble h4 { color: #c4c4cf; }
body.dark-mode .assistant .message-bubble strong { color: #eeeef5; }
body.dark-mode .assistant .message-bubble em { color: #c4c4cf; }

body.dark-mode .reasoning-box {
  background: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(99,102,241,0.06) 100%);
  border-color: rgba(59,130,246,0.2);
  border-left-color: var(--blue-500);
  color: #a8a8b5;
}

body.dark-mode .reasoning-box strong { color: #60a5fa; }

body.dark-mode .reasoning-box-clickable:hover {
  background: linear-gradient(135deg, rgba(59,130,246,0.14) 0%, rgba(99,102,241,0.1) 100%);
  border-color: rgba(59,130,246,0.3);
}

body.dark-mode .follow-ups-section {
  border-top-color: #2c2c35;
}

body.dark-mode .follow-up-btn {
  background: #1a1a1f;
  border-color: #2c2c35;
  color: #c4c4cf;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

body.dark-mode .follow-up-btn:hover {
  background: linear-gradient(135deg, rgba(59,130,246,0.1) 0%, rgba(99,102,241,0.08) 100%);
  border-color: rgba(96,165,250,0.5);
  color: #60a5fa;
  box-shadow: 0 4px 14px rgba(59,130,246,0.18);
}

body.dark-mode .chat-input-area {
  background: #131316;
  border-top: 1px solid #222228;
}

body.dark-mode .chat-input-wrapper {
  background: #1a1a1f;
  border-color: #2c2c35;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3), 0 0 0 0.5px rgba(255,255,255,0.03);
}

body.dark-mode .chat-input-wrapper:focus-within {
  border-color: rgba(96,165,250,0.6);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.12), 0 4px 20px rgba(0,0,0,0.3);
}

body.dark-mode .chat-input {
  color: #dcdce5;
}

body.dark-mode .chat-input::placeholder {
  color: #5c5c69;
}

body.dark-mode .send-btn {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 2px 8px rgba(37,99,235,0.35);
}

body.dark-mode .send-btn:hover {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  box-shadow: 0 4px 14px rgba(59,130,246,0.4);
}

body.dark-mode .upload-btn { color: #5c5c69; }
body.dark-mode .upload-btn:hover { background: #222228; color: #60a5fa; }

body.dark-mode .mic-btn { color: #5c5c69; }
body.dark-mode .mic-btn:hover { background: #222228; color: #60a5fa; }
body.dark-mode .mic-btn.recording {
  background: rgba(239,68,68,0.15);
  color: #ef4444;
}

body.dark-mode .typing-indicator {
  background: #1a1a1f;
  border-color: #2c2c35;
}

body.dark-mode .typing-indicator::after {
  background: linear-gradient(90deg, transparent 0%, rgba(59,130,246,0.06) 40%, rgba(99,102,241,0.04) 60%, transparent 100%);
}

body.dark-mode .skeleton-bubble {
  background: #1a1a1f;
  border-color: #2c2c35;
}

body.dark-mode .skeleton-line {
  background: linear-gradient(90deg, #222228 25%, rgba(59,130,246,0.06) 50%, #222228 75%);
  background-size: 600px 100%;
}

body.dark-mode .progress-panel {
  background: #1a1a1f;
  border-color: #2c2c35;
}

body.dark-mode .progress-panel::before {
  background: linear-gradient(180deg, #60a5fa, #3b82f6);
}

body.dark-mode .progress-panel-header {
  color: #8a8a97;
}

body.dark-mode .progress-step-spinner {
  border-color: #2c2c35;
  border-top-color: #60a5fa;
}

body.dark-mode .progress-step-check {
  color: #4ade80;
}

body.dark-mode .progress-step-label {
  color: #c4c4cf;
}

body.dark-mode .progress-step.completed .progress-step-label {
  color: #6b6b7b;
}

body.dark-mode .progress-step-detail {
  color: #5c5c69;
}

body.dark-mode .profile-modal-overlay {
  background: rgba(0,0,0,0.65);
}
@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  body.dark-mode .profile-modal-overlay {
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
}

body.dark-mode .profile-modal {
  background: #1a1a1f;
  box-shadow: 0 24px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

body.dark-mode .profile-form .form-group input,
body.dark-mode .profile-form .form-group select {
  background: #222228;
  border-color: #3a3a45;
  color: #dcdce5;
}

body.dark-mode .profile-form .form-group input:focus,
body.dark-mode .profile-form .form-group select:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
  background: #222228;
}

body.dark-mode .profile-form .form-actions {
  border-top-color: #2c2c35;
}

body.dark-mode .profile-form .btn-cancel {
  background: #222228;
  border-color: #3a3a45;
  color: #c4c4cf;
}

body.dark-mode .profile-form .btn-cancel:hover {
  background: #2c2c35;
}

body.dark-mode .shortcut-modal-overlay {
  background: rgba(0,0,0,0.65);
}
@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  body.dark-mode .shortcut-modal-overlay {
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
}

body.dark-mode .shortcut-modal {
  background: #1a1a1f;
  box-shadow: 0 24px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

body.dark-mode .shortcut-modal .form-group input,
body.dark-mode .shortcut-modal .form-group textarea {
  background: #222228;
  border-color: #3a3a45;
  color: #dcdce5;
}

body.dark-mode .shortcut-modal .form-group input:focus,
body.dark-mode .shortcut-modal .form-group textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

body.dark-mode .shortcut-modal-btns button:not(.primary) {
  background: #222228;
  border-color: #3a3a45;
  color: #c4c4cf;
}

body.dark-mode .shortcut-modal-btns button:not(.primary):hover {
  background: #2c2c35;
}

body.dark-mode .format-dropdown {
  background: #1a1a1f;
  border-color: #2c2c35;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

body.dark-mode .format-option:hover {
  background: rgba(59,130,246,0.1);
}

body.dark-mode .format-option.selected {
  background: rgba(59,130,246,0.12);
  color: #60a5fa;
}

body.dark-mode .format-option .format-desc { color: #8a8a97; }

body.dark-mode .template-category {
  border-color: #2c2c35;
  background: #17171a;
}

body.dark-mode .template-category-header {
  background: #1c1c21;
  color: #a8a8b5;
}

body.dark-mode .template-category-header:hover {
  background: rgba(59,130,246,0.08);
  color: #60a5fa;
}

body.dark-mode .quick-action-btn {
  background: #17171a;
  border-color: #2c2c35;
  color: #a8a8b5;
}

body.dark-mode .quick-action-btn:hover {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .doc-indicator-panel {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.15);
}

body.dark-mode .doc-upload-card {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.15);
}

body.dark-mode .doc-upload-card-raw {
  background: #222228;
  color: #a8a8b5;
}

body.dark-mode .doc-upload-card-toggle {
  border-color: #3a3a45;
  color: #8a8a97;
}

body.dark-mode .doc-upload-card-toggle:hover {
  color: #60a5fa;
  border-color: var(--blue-500);
}

body.dark-mode .doc-retention-banner {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.15);
}

body.dark-mode .doc-retention-banner.expired {
  background: rgba(245,158,11,0.1);
  border-color: rgba(245,158,11,0.2);
}

body.dark-mode .doc-context-chip {
  background: rgba(16,185,129,0.1);
  border-color: rgba(16,185,129,0.2);
  color: #34d399;
}

body.dark-mode .pending-files-bar {
  background: #1c1c21;
  border-color: #2c2c35;
}

body.dark-mode .pending-file-chip {
  background: rgba(59,130,246,0.1);
  border-color: rgba(59,130,246,0.2);
  color: #60a5fa;
}

body.dark-mode .shortcuts-help {
  background: #1a1a1f;
  border-color: #2c2c35;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

body.dark-mode .shortcut-key {
  background: #222228;
  border-color: #3a3a45;
  color: #a8a8b5;
}

body.dark-mode .session-search input {
  background: #17171a;
  border-color: #2c2c35;
  color: #dcdce5;
}

body.dark-mode .session-search input:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}

body.dark-mode .session-tag {
  background: rgba(59,130,246,0.12);
  color: #60a5fa;
}

body.dark-mode .tag-input-inline {
  background: #222228;
  border-color: var(--blue-500);
  color: #dcdce5;
}

body.dark-mode .comparison-card {
  background: #1a1a1f;
  border-color: #2c2c35;
}

body.dark-mode .comparison-header {
  background: #1c1c21;
}

body.dark-mode .comparison-header-cell:not(:first-child) {
  border-left-color: rgba(255,255,255,0.08);
}

body.dark-mode .comparison-row {
  border-top-color: #2c2c35;
}

body.dark-mode .comparison-row.has-diff {
  background: rgba(245,158,11,0.06);
}

body.dark-mode .comparison-row:nth-child(even).has-diff {
  background: rgba(245,158,11,0.1);
}

body.dark-mode .comparison-cell.label-cell {
  background: #1c1c21;
  color: #eeeef5;
}

body.dark-mode .comparison-cell:not(:first-child) {
  border-left-color: #2c2c35;
}

body.dark-mode .tips-tool-callout {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.2);
  color: #a8a8b5;
}

body.dark-mode .tips-tool-callout strong { color: #60a5fa; }

body.dark-mode .tips-category {
  background: #1c1c21;
  border-color: #2c2c35;
}

body.dark-mode .welcome-tip-pill {
  background: #1c1c21;
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .welcome-message h2 {
  color: #eeeef5;
  background: linear-gradient(135deg, #eeeef5 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.dark-mode .login-card {
  background: rgba(26,26,31,0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 25px 60px rgba(0,0,0,0.6),
              0 0 0 1px rgba(255,255,255,0.06),
              inset 0 1px 0 rgba(255,255,255,0.04);
}

body.dark-mode .login-card h1 { color: #eeeef5; }

body.dark-mode .form-group input {
  background: #222228;
  border-color: #3a3a45;
  color: #dcdce5;
}

body.dark-mode .form-group input:focus {
  border-color: rgba(96,165,250,0.6);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.12);
  background: #222228;
}

body.dark-mode .form-group input::placeholder { color: #5c5c69; }

body.dark-mode .form-group select {
  background: #222228;
  border-color: #3a3a45;
  color: #dcdce5;
}

body.dark-mode .login-error {
  background: rgba(239,68,68,0.12);
  color: #fca5a5;
}

body.dark-mode .reset-success {
  background: rgba(34,197,94,0.12);
  color: #86efac;
}

body.dark-mode .upload-status {
  background: #1c1c21;
  border-color: #2c2c35;
}

body.dark-mode .upload-status.success {
  background: rgba(34,197,94,0.12);
  border-color: rgba(34,197,94,0.3);
  color: #86efac;
}

body.dark-mode .upload-status.error {
  background: rgba(239,68,68,0.12);
  border-color: rgba(239,68,68,0.3);
  color: #fca5a5;
}

body.dark-mode .export-btn {
  background: #1c1c21;
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .export-btn:hover {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .answer-action-btn {
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .answer-action-btn:hover {
  color: #60a5fa;
  border-color: var(--blue-500);
  background: rgba(59,130,246,0.08);
}

body.dark-mode .regenerate-btn {
  background: #1a1a1f;
  border-color: #2c2c35;
  color: #a8a8b5;
}

body.dark-mode .regenerate-btn:hover {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .msg-edit-textarea {
  background: #222228;
  border-color: var(--blue-500);
  color: #dcdce5;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

body.dark-mode .msg-edit-cancel {
  background: #222228;
  border-color: #3a3a45;
  color: #c4c4cf;
}

body.dark-mode .msg-edit-cancel:hover {
  background: #2c2c35;
}

body.dark-mode .msg-edit-btn {
  background: #1a1a1f;
  border-color: #2c2c35;
  color: #5c5c69;
}

body.dark-mode .msg-edit-btn:hover {
  color: #60a5fa;
  border-color: var(--blue-500);
}

body.dark-mode .move-folder-dropdown {
  background: #1a1a1f;
  border-color: #2c2c35;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

body.dark-mode .move-folder-option:hover {
  background: #222228;
}

body.dark-mode .folder-rename-input,
body.dark-mode .session-rename-input {
  background: #222228;
  border-color: #3a3a45;
  color: #dcdce5;
}

body.dark-mode .doc-intelligence-badge {
  background: rgba(59,130,246,0.1);
  border-color: rgba(59,130,246,0.2);
  color: #60a5fa;
}

body.dark-mode .doc-intel-types { color: #60a5fa; }

body.dark-mode .doc-intel-conf.high {
  background: rgba(34,197,94,0.15);
  color: #86efac;
}

body.dark-mode .doc-intel-conf.medium {
  background: rgba(245,158,11,0.15);
  color: #fbbf24;
}

body.dark-mode .sidebar-overlay {
  background: rgba(0,0,0,0.65);
}
@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  body.dark-mode .sidebar-overlay {
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
}

body.dark-mode .bookmark-item {
  border-bottom-color: #222228;
}

body.dark-mode .bookmark-item:hover {
  background: #1c1c21;
}

body.dark-mode .quick-actions-toggle {
  border-color: #3a3a45;
  color: #5c5c69;
}

body.dark-mode .quick-actions-toggle:hover {
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .save-shortcut-btn {
  border-color: #3a3a45;
  color: #5c5c69;
}

body.dark-mode .save-shortcut-btn:hover {
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .welcome-tips-toggle {
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .welcome-tips-toggle:hover {
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .format-toggle-btn {
  background: #1c1c21;
  border-color: #3a3a45;
  color: #a8a8b5;
}

body.dark-mode .format-toggle-btn:hover,
body.dark-mode .format-toggle-btn.active {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .welcome-ams-section h4 { color: #8a8a97; }

body.dark-mode .new-folder-btn {
  border-color: #3a3a45;
  color: #5c5c69;
}

body.dark-mode .new-folder-btn:hover {
  border-color: var(--blue-500);
  color: #60a5fa;
  background: rgba(59,130,246,0.08);
}

body.dark-mode .tag-add-btn {
  border-color: #3a3a45;
  color: #5c5c69;
}

body.dark-mode .tag-add-btn:hover {
  border-color: var(--blue-500);
  color: #60a5fa;
  background: rgba(59,130,246,0.08);
}

body.dark-mode .assistant .message-bubble .checklist-item.checked {
  color: #8a8a97;
}

/* Dark mode mobile sidebar: see MOBILE-OPTIMIZED EXPERIENCE section */

body.dark-mode .doc-panel {
  background: #131316;
  border-left-color: #222228;
}

body.dark-mode .doc-panel-header {
  background: #131316;
  border-bottom-color: #222228;
}

body.dark-mode .doc-panel-title {
  color: #dcdce5;
}

body.dark-mode .doc-panel-tab {
  background: #1c1c21;
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .doc-panel-tab:hover {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .doc-panel-tab.active {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: #fff;
}

body.dark-mode .doc-panel-action-btn {
  background: #1c1c21;
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .doc-panel-action-btn:hover {
  background: rgba(59,130,246,0.1);
  border-color: var(--blue-500);
  color: #60a5fa;
}

body.dark-mode .doc-panel-close-btn {
  border-color: #2c2c35;
  color: #8a8a97;
}

body.dark-mode .doc-panel-close-btn:hover {
  background: rgba(239,68,68,0.1);
  border-color: rgba(239,68,68,0.3);
  color: #f87171;
}

body.dark-mode .doc-panel-content {
  color: #dcdce5;
}

body.dark-mode .doc-panel-content h1 {
  color: #e8e8f0;
  border-bottom-color: rgba(59,130,246,0.2);
}

body.dark-mode .doc-panel-content h2 {
  color: #e8e8f0;
  border-bottom-color: #2c2c35;
}

body.dark-mode .doc-panel-content h3 { color: #dcdce5; }
body.dark-mode .doc-panel-content h4 { color: #a8a8b5; }

body.dark-mode .doc-panel-content strong { color: #e8e8f0; }

body.dark-mode .doc-panel-content blockquote {
  background: rgba(59,130,246,0.08);
  border-left-color: var(--blue-500);
  color: #a8a8b5;
}

body.dark-mode .doc-panel-content table {
  border-color: #2c2c35;
}

body.dark-mode .doc-panel-content th {
  background: #1c1c21;
  color: #dcdce5;
}

body.dark-mode .doc-panel-content td {
  border-bottom-color: #222228;
  color: #a8a8b5;
}

body.dark-mode .doc-panel-content tr:nth-child(even) td {
  background: rgba(255,255,255,0.02);
}

body.dark-mode .doc-panel-content code {
  background: #222228;
  color: #e8b4b8;
}

body.dark-mode .doc-panel-content pre {
  background: #0d0d10;
  border-color: #2c2c35;
}

body.dark-mode .doc-panel-content pre code {
  color: #c9d1d9;
}

body.dark-mode .doc-panel-content hr {
  border-top-color: #2c2c35;
}

body.dark-mode .doc-panel-resize-handle::after {
  background: #5c5c69;
}

body.dark-mode .doc-panel-resize-handle:hover,
body.dark-mode .doc-panel-resize-handle.dragging {
  background: #1c1c21;
}

body.dark-mode .open-in-panel-btn {
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(59,130,246,0.15));
  border-color: rgba(59,130,246,0.3);
  color: #60a5fa;
}

body.dark-mode .open-in-panel-btn:hover {
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(59,130,246,0.2));
  border-color: var(--blue-500);
  box-shadow: 0 2px 8px rgba(59,130,246,0.2);
}

body.dark-mode .theme-toggle-btn:hover {
  background: rgba(59,130,246,0.1);
  color: #60a5fa;
  border-color: rgba(59,130,246,0.3);
}

body.dark-mode .logout-btn:hover {
  background: rgba(239,68,68,0.1);
  color: #f87171;
  border-color: rgba(239,68,68,0.3);
}

body.dark-mode .welcome-example-btn {
  background: #1a1a1f;
  border-color: #2c2c35;
  color: #a8a8b5;
}

body.dark-mode .welcome-example-btn:hover {
  background: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(99,102,241,0.06) 100%);
  border-color: rgba(96,165,250,0.4);
  color: #dcdce5;
  box-shadow: 0 8px 24px rgba(59,130,246,0.12);
}

body.dark-mode ::-webkit-scrollbar-thumb { background: #3a3a45; }
body.dark-mode ::-webkit-scrollbar-thumb:hover { background: #5c5c69; }

/* ============================================ */
/* MOBILE-OPTIMIZED EXPERIENCE                  */
/* ============================================ */

@keyframes mobileBottomSheetSlideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
@keyframes mobileBottomSheetSlideDown {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}
@keyframes mobilePulseRing {
  0% { box-shadow: 0 0 0 0 rgba(239,68,68,0.5); }
  70% { box-shadow: 0 0 0 14px rgba(239,68,68,0); }
  100% { box-shadow: 0 0 0 0 rgba(239,68,68,0); }
}
@keyframes mobileDocPanelSlideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.mobile-bottom-sheet-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 199;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.mobile-bottom-sheet-overlay.show {
  display: block;
  opacity: 1;
}

.doc-panel-drag-handle {
  display: none;
}

@media (max-width: 768px) {
  html {
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
  }

  .app-container {
    overflow-x: hidden;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: none;
    will-change: transform;
  }

  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 8px 0 24px rgba(0,0,0,0.12);
  }

  .sidebar.mobile-swiping {
    transition: none;
  }

  .sidebar-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    font-size: 20px;
  }

  .chat-header {
    padding: 8px 12px;
    gap: 8px;
  }

  .chat-header h3 {
    font-size: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 55vw;
  }

  .chat-messages {
    padding: 12px;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    scroll-behavior: auto;
  }

  .message-content {
    max-width: 92%;
  }

  .message-bubble {
    padding: 10px 14px;
    font-size: 14px;
    line-height: 1.55;
  }

  .chat-input-area {
    padding: 8px 12px 12px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    transition: padding-bottom 0.15s ease;
  }

  .chat-input-wrapper {
    padding: 4px 4px 4px 2px;
    gap: 6px;
    border-radius: 16px;
  }

  .chat-input {
    padding: 8px 10px;
    font-size: 16px;
    min-height: 40px;
    max-height: 100px;
  }

  .send-btn {
    min-height: 44px;
    min-width: 44px;
    padding: 8px 14px;
    font-size: 14px;
    border-radius: 12px;
  }

  .upload-btn {
    min-height: 44px;
    min-width: 44px;
    font-size: 20px;
    border-radius: 10px;
  }

  .mic-btn {
    min-height: 48px;
    min-width: 48px;
    font-size: 22px;
    border-radius: 50%;
    background: var(--blue-50);
    color: var(--blue-600);
    border: 2px solid var(--blue-200);
  }

  .mic-btn svg {
    width: 24px;
    height: 24px;
  }

  .mic-btn.recording {
    background: var(--red-100);
    border-color: var(--red-400);
    color: var(--red-500);
    animation: mobilePulseRing 1.2s ease-in-out infinite;
  }

  .mic-timer {
    top: -10px;
    right: -10px;
    font-size: 11px;
    padding: 2px 7px;
  }

  .format-toggle {
    display: none;
  }

  .new-chat-btn { min-height: 44px; font-size: 14px; }
  .nav-link { min-height: 44px; font-size: 14px; padding: 10px 16px; }
  .logout-btn { min-height: 44px; font-size: 14px; }
  .profile-btn { min-height: 44px; font-size: 14px; }
  .theme-toggle-btn { min-height: 44px; }

  .session-item {
    min-height: 44px;
    padding: 10px 12px;
  }

  .session-item-title {
    font-size: 13px;
  }

  .login-card {
    margin: 16px;
    padding: 28px 20px;
    max-width: 100%;
    border-radius: 16px;
  }

  .login-card .form-group input {
    font-size: 16px;
    min-height: 44px;
  }

  .login-card .btn {
    min-height: 48px;
    font-size: 15px;
  }

  .welcome-examples {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .welcome-example-btn {
    padding: 14px 16px;
    font-size: 14px;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
  }

  .welcome-example-btn:active {
    background: var(--blue-50);
    border-color: var(--blue-300);
    transform: scale(0.98);
  }

  .welcome-message h2 {
    font-size: 20px;
  }

  .welcome-message p {
    font-size: 14px;
  }

  .user-msg-actions {
    opacity: 1;
  }

  .answer-action-btn {
    min-height: 36px;
    padding: 6px 10px;
    font-size: 12px;
    -webkit-tap-highlight-color: transparent;
  }

  .follow-up-chip {
    padding: 8px 14px;
    font-size: 13px;
    min-height: 40px;
    -webkit-tap-highlight-color: transparent;
  }

  .quick-actions-bar {
    max-height: none;
  }

  .quick-actions-bar.mobile-bottom-sheet {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 200;
    background: var(--white);
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.15);
    padding: 0 16px 16px;
    padding-bottom: max(16px, env(safe-area-inset-bottom));
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    animation: mobileBottomSheetSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    margin: 0;
  }

  .quick-actions-bar.mobile-bottom-sheet .template-category {
    display: block !important;
    margin-bottom: 6px;
  }

  .quick-actions-bar.mobile-bottom-sheet .template-category-header {
    padding: 12px 14px;
    font-size: 14px;
    min-height: 44px;
  }

  .quick-actions-bar.mobile-bottom-sheet .quick-action-btn {
    padding: 10px 16px;
    font-size: 13px;
    min-height: 40px;
  }

  .quick-actions-bar.mobile-bottom-sheet .quick-actions-toggle,
  .quick-actions-bar.mobile-bottom-sheet .save-shortcut-btn {
    display: none !important;
  }

  .mobile-bottom-sheet-handle {
    width: 40px;
    height: 5px;
    background: var(--gray-300);
    border-radius: 3px;
    margin: 10px auto 8px;
    flex-shrink: 0;
  }

  .mobile-bottom-sheet-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-700);
    padding: 4px 0 12px;
    text-align: center;
    border-bottom: 1px solid var(--gray-100);
    margin-bottom: 8px;
  }

  .quick-actions-toggle {
    min-height: 44px;
    padding: 8px 14px;
    font-size: 13px;
  }

  .app-container.panel-open .doc-panel {
    width: 100%;
    min-width: 0;
    position: fixed;
    inset: 0;
    z-index: 100;
    border-left: none;
    animation: mobileDocPanelSlideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .app-container.panel-open .doc-panel.doc-panel-dismissing {
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 1, 1);
  }

  .app-container.panel-open .doc-panel.doc-panel-swiping {
    transition: none;
  }

  .doc-panel-drag-handle {
    display: block;
    width: 100%;
    padding: 10px 0 4px;
    cursor: grab;
    text-align: center;
    flex-shrink: 0;
  }

  .doc-panel-drag-handle::after {
    content: '';
    display: block;
    width: 40px;
    height: 5px;
    background: var(--gray-300);
    border-radius: 3px;
    margin: 0 auto;
  }

  .app-container.panel-open .chat-main {
    display: none;
  }

  .app-container.panel-open .doc-panel-resize-handle {
    display: none;
  }

  .doc-panel-mobile-back {
    display: inline-flex;
    min-height: 44px;
    min-width: 44px;
    font-size: 14px;
  }

  .doc-panel-close-btn {
    display: none;
  }

  #docPanelExpandBtn {
    display: none;
  }

  .doc-panel-content {
    padding: 16px;
    font-size: 15px;
    -webkit-overflow-scrolling: touch;
  }

  .doc-panel-action-btn {
    padding: 8px 12px;
    font-size: 12px;
    min-height: 40px;
  }

  .doc-panel-header {
    padding: 4px 12px 8px;
    flex-wrap: wrap;
    gap: 6px;
  }

  .doc-panel-actions {
    gap: 6px;
    flex-wrap: wrap;
  }

  .doc-panel-tabs {
    order: 10;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    gap: 6px;
    padding-bottom: 4px;
  }

  .doc-panel-tab {
    min-height: 36px;
    flex-shrink: 0;
    font-size: 12px;
  }

  .pending-files-bar {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
    flex-wrap: nowrap;
  }

  .pending-file-chip {
    flex-shrink: 0;
    min-height: 36px;
  }

  .error-toast, .success-toast {
    left: 12px;
    right: 12px;
    width: auto;
    max-width: none;
    font-size: 13px;
    bottom: 80px;
  }

  .shortcuts-help {
    display: none !important;
  }

  .profile-modal-overlay .modal-content {
    margin: 12px;
    max-height: calc(100vh - 24px);
    border-radius: 16px;
  }

  .save-shortcut-modal .modal-content {
    margin: 12px;
    max-width: calc(100vw - 24px);
    border-radius: 16px;
  }

  .comparison-toggle-bar {
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
  }

  .comparison-toggle-btn {
    min-height: 36px;
    font-size: 12px;
  }

  .regenerate-btn {
    min-height: 40px;
    padding: 8px 16px;
    font-size: 13px;
  }

  .reasoning-bar {
    padding: 8px 12px;
    font-size: 12px;
  }

  *:not(input):not(textarea):not(select) {
    -webkit-tap-highlight-color: transparent;
  }
}

@media (max-width: 480px) {
  .chat-header h3 {
    font-size: 14px;
    max-width: 45vw;
  }

  .chat-messages {
    padding: 10px 8px;
  }

  .message-content {
    max-width: 95%;
  }

  .chat-input-area {
    padding: 6px 8px 10px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
  }

  .chat-input-wrapper {
    gap: 4px;
    padding: 3px;
  }

  .chat-input {
    padding: 8px;
    font-size: 16px;
  }

  .send-btn {
    padding: 8px 12px;
    font-size: 13px;
  }

  .welcome-message h2 {
    font-size: 18px;
  }

  .answer-actions {
    flex-wrap: wrap;
    gap: 4px;
  }
}

@media (max-width: 768px) {
  body.dark-mode .sidebar.mobile-open {
    box-shadow: 8px 0 24px rgba(0,0,0,0.5);
  }

  body.dark-mode .quick-actions-bar.mobile-bottom-sheet {
    background: #131316;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.4);
  }

  body.dark-mode .mobile-bottom-sheet-handle {
    background: #5c5c69;
  }

  body.dark-mode .mobile-bottom-sheet-title {
    color: #dcdce5;
    border-bottom-color: #2c2c35;
  }

  body.dark-mode .mobile-bottom-sheet-overlay {
    background: rgba(0,0,0,0.6);
  }

  body.dark-mode .doc-panel-drag-handle::after {
    background: #5c5c69;
  }

  body.dark-mode .mic-btn {
    background: rgba(59,130,246,0.1);
    border-color: rgba(59,130,246,0.3);
    color: #60a5fa;
  }

  body.dark-mode .mic-btn.recording {
    background: rgba(239,68,68,0.15);
    border-color: rgba(239,68,68,0.4);
    color: #f87171;
  }
}