/* MEDI GYAAN AI - ENHANCED UI */
:root {
    --primary: #1d4ed8; --primary-light: #3b82f6; --primary-dark: #1e40af;
    --primary-container: #dbeafe; --on-primary: #fff; --on-primary-container: #1e3a8a;
    --secondary: #7c3aed; --secondary-container: #ede9fe; --on-secondary-container: #5b21b6;
    --tertiary: #0d9488; --tertiary-container: #ccfbf1; --on-tertiary-container: #115e59;
    --surface: #fff; --surface-dim: #f8fafc; --surface-container: #f1f5f9;
    --surface-variant: #f1f5f9; --on-surface: #0f172a; --on-surface-variant: #64748b;
    --outline: #cbd5e1; --outline-variant: #e2e8f0; --background: #f0f4ff;
    --error: #ef4444; --success: #10b981; --warning: #f59e0b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05); --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1); --shadow-xl: 0 20px 25px rgba(0,0,0,0.1);
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 24px; --radius-full: 9999px;
    --gradient-primary: linear-gradient(135deg, #1d4ed8, #7c3aed);
    --gradient-secondary: linear-gradient(135deg, #0d9488, #1d4ed8);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
[data-theme="dark"] {
    --primary: #60a5fa; --primary-container: #1e3a5f; --on-primary: #0f172a; --on-primary-container: #bfdbfe;
    --secondary: #a78bfa; --secondary-container: #3b1f6e; --on-secondary-container: #ddd6fe;
    --tertiary: #2dd4bf; --tertiary-container: #134e4a; --on-tertiary-container: #99f6e4;
    --surface: #1e293b; --surface-dim: #0f172a; --surface-container: #1e293b;
    --surface-variant: #334155; --on-surface: #f1f5f9; --on-surface-variant: #94a3b8;
    --outline: #475569; --outline-variant: #334155; --background: #0f172a;
    --error: #f87171; --success: #34d399; --warning: #fbbf24;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3); --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.4); --shadow-xl: 0 20px 25px rgba(0,0,0,0.5);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:var(--font); background:var(--background); color:var(--on-surface); display:flex; justify-content:center; align-items:center; min-height:100vh; min-height:100dvh; overflow:hidden; -webkit-font-smoothing:antialiased; }

/* Background Animation */
.bg-animation { position:fixed; inset:0; z-index:-1; background:var(--background); overflow:hidden; }
.particle { position:absolute; width:6px; height:6px; background:var(--primary); border-radius:50%; opacity:0.15; animation:float 20s infinite ease-in-out; }
.particle:nth-child(1){top:10%;left:10%;animation-delay:0s} .particle:nth-child(2){top:20%;left:80%;animation-delay:2s;width:8px;height:8px}
.particle:nth-child(3){top:60%;left:20%;animation-delay:4s;width:4px;height:4px} .particle:nth-child(4){top:80%;left:70%;animation-delay:1s}
.particle:nth-child(5){top:40%;left:50%;animation-delay:3s;width:10px;height:10px} .particle:nth-child(6){top:70%;left:90%;animation-delay:5s;width:5px;height:5px}
.particle:nth-child(7){top:30%;left:30%;animation-delay:2.5s} .particle:nth-child(8){top:90%;left:40%;animation-delay:1.5s;width:7px;height:7px}
@keyframes float { 0%,100%{transform:translate(0,0);opacity:.15} 25%{transform:translate(50px,-50px);opacity:.25} 50%{transform:translate(-30px,-100px);opacity:.1} 75%{transform:translate(80px,-50px);opacity:.2} }

/* Container */
.chat-container { width:100%; max-width:800px; height:100vh; height:100dvh; background:var(--surface); display:flex; flex-direction:column; position:relative; overflow:hidden; box-shadow:var(--shadow-xl); }
@media(min-width:768px) { .chat-container { height:96vh; max-height:900px; border-radius:var(--radius-xl); border:1px solid var(--outline-variant); } }

/* Header */
.app-header { padding:12px 16px; background:var(--surface); backdrop-filter:blur(20px); display:flex; justify-content:space-between; align-items:center; border-bottom:1px solid var(--outline-variant); gap:8px; z-index:10; }
.header-left { display:flex; align-items:center; gap:12px; min-width:0; }
.logo-wrapper { position:relative; width:40px; height:40px; flex-shrink:0; }
.logo-image { width:40px; height:40px; border-radius:50%; object-fit:cover; border:2px solid var(--primary); position:relative; z-index:2; }
.logo-ring { position:absolute; inset:-3px; border-radius:50%; border:2px solid var(--primary); opacity:0; animation:logo-pulse 3s infinite ease-out; }
@keyframes logo-pulse { 0%{transform:scale(1);opacity:.6} 100%{transform:scale(1.4);opacity:0} }
.header-info h1 { font-size:16px; font-weight:700; background:var(--gradient-primary); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.status-line { display:flex; align-items:center; gap:5px; }
.status-dot { width:7px; height:7px; background:var(--success); border-radius:50%; animation:status-pulse 2s infinite; }
@keyframes status-pulse { 0%,100%{box-shadow:0 0 0 0 rgba(16,185,129,.4)} 50%{box-shadow:0 0 0 4px rgba(16,185,129,0)} }
.status-text { font-size:11px; color:var(--on-surface-variant); font-weight:500; }
.header-actions { display:flex; gap:4px; align-items:center; }
.icon-btn { width:36px; height:36px; border-radius:var(--radius-md); border:none; background:transparent; color:var(--on-surface-variant); cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:15px; transition:all .15s; position:relative; }
.icon-btn:hover { background:var(--surface-variant); color:var(--primary); transform:scale(1.05); }
.icon-btn:active { transform:scale(0.95); }
.model-chip { display:flex; align-items:center; gap:5px; padding:6px 12px; border-radius:var(--radius-full); border:1px solid var(--outline-variant); background:var(--surface-container); color:var(--on-surface); font-size:12px; font-weight:600; cursor:pointer; transition:all .15s; white-space:nowrap; }
.model-chip:hover { background:var(--primary-container); border-color:var(--primary); color:var(--primary); }
.model-chip i { font-size:11px; color:var(--primary); }

/* Tools Bar */
.tools-bar { display:flex; overflow-x:auto; padding:8px 12px; gap:6px; border-bottom:1px solid var(--outline-variant); background:var(--surface-dim); scrollbar-width:none; }
.tools-bar::-webkit-scrollbar { display:none; }
.tool-chip { display:flex; align-items:center; gap:5px; white-space:nowrap; padding:6px 12px; font-size:12px; font-weight:500; background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-full); color:var(--on-surface-variant); cursor:pointer; transition:all .15s; }
.tool-chip:hover { background:var(--surface-variant); border-color:var(--primary); color:var(--primary); transform:translateY(-1px); }
.tool-chip.active { background:var(--primary); border-color:var(--primary); color:white; }

/* Messages */
main { flex:1; min-height:0; overflow-y:auto; overflow-x:hidden; padding:16px; display:flex; flex-direction:column; gap:12px; background:var(--surface-dim); -webkit-overflow-scrolling:touch; overscroll-behavior:contain; }
main::-webkit-scrollbar { width:6px; } main::-webkit-scrollbar-thumb { background:var(--outline); border-radius:3px; }

/* Welcome */
.welcome-screen { display:flex; flex-direction:column; align-items:center; justify-content:center; padding:24px 16px; animation:fadeInUp .6s ease; flex:1; }
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
.welcome-animation { position:relative; width:80px; height:80px; margin-bottom:20px; }
.brain-icon { width:80px; height:80px; border-radius:50%; background:var(--gradient-primary); display:flex; align-items:center; justify-content:center; font-size:36px; color:white; animation:brain-float 4s infinite ease-in-out; box-shadow:0 8px 32px rgba(29,78,216,.3); }
@keyframes brain-float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.pulse-ring { position:absolute; inset:-8px; border-radius:50%; border:2px solid var(--primary); animation:pulse-expand 2.5s infinite ease-out; }
@keyframes pulse-expand { 0%{transform:scale(.8);opacity:.8} 100%{transform:scale(1.5);opacity:0} }
.welcome-title { font-size:24px; font-weight:800; background:var(--gradient-primary); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; margin-bottom:8px; }
.welcome-subtitle { font-size:14px; color:var(--on-surface-variant); margin-bottom:24px; }
.feature-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:12px; width:100%; max-width:500px; margin-bottom:24px; }
@media(min-width:600px) { .feature-grid { grid-template-columns:repeat(3,1fr); } }
.feature-card { background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:16px 12px; text-align:center; cursor:pointer; transition:all .3s; }
.feature-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:var(--primary); }
.feature-icon { width:44px; height:44px; border-radius:var(--radius-md); display:flex; align-items:center; justify-content:center; font-size:20px; margin:0 auto 10px; }
.feature-icon.pubmed{background:#fef3c7;color:#d97706} .feature-icon.poster{background:#ede9fe;color:#7c3aed} .feature-icon.chapter{background:#dbeafe;color:#1d4ed8}
.feature-icon.counselor{background:#ccfbf1;color:#0d9488} .feature-icon.thesis{background:#fce7f3;color:#db2777} .feature-icon.chat{background:#e0e7ff;color:#4f46e5}
[data-theme="dark"] .feature-icon.pubmed{background:#451a03} [data-theme="dark"] .feature-icon.poster{background:#3b1f6e} [data-theme="dark"] .feature-icon.chapter{background:#1e3a5f}
[data-theme="dark"] .feature-icon.counselor{background:#134e4a} [data-theme="dark"] .feature-icon.thesis{background:#4a1942} [data-theme="dark"] .feature-icon.chat{background:#312e81}
.feature-card h4 { font-size:13px; font-weight:600; margin-bottom:4px; }
.feature-card p { font-size:11px; color:var(--on-surface-variant); }
.quick-actions { display:flex; flex-wrap:wrap; gap:8px; justify-content:center; max-width:500px; }
.quick-btn { display:flex; align-items:center; gap:6px; padding:8px 14px; border-radius:var(--radius-full); border:1px solid var(--outline-variant); background:var(--surface); color:var(--on-surface); font-size:12px; font-weight:500; cursor:pointer; transition:all .15s; }
.quick-btn:hover { background:var(--primary-container); border-color:var(--primary); color:var(--primary); transform:translateY(-2px); }

/* Messages */
.message { max-width:85%; padding:12px 16px; border-radius:var(--radius-lg); font-size:14px; line-height:1.6; word-wrap:break-word; white-space:pre-wrap; animation:msg-in .3s ease; }
@keyframes msg-in { from{opacity:0;transform:translateY(10px) scale(.98)} to{opacity:1;transform:translateY(0) scale(1)} }
.message.user { align-self:flex-end; background:var(--gradient-primary); color:white; border-bottom-right-radius:4px; box-shadow:0 2px 8px rgba(29,78,216,.25); }
.message.assistant { align-self:flex-start; background:var(--surface); color:var(--on-surface); border-bottom-left-radius:4px; border:1px solid var(--outline-variant); box-shadow:var(--shadow-sm); }
.msg-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  margin-bottom: 12px;
  align-self: flex-start;
  opacity: 0.92;
  transition: opacity 0.15s ease;
}
.msg-actions:hover {
  opacity: 1;
}
.msg-actions .reply-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  height: 28px;
  border-radius: var(--radius-sm, 6px);
  border: 1px solid var(--outline-variant);
  background: var(--surface);
  color: var(--on-surface-variant);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.msg-actions .reply-action-btn i {
  font-size: 12px;
  opacity: 0.85;
}
.msg-actions .reply-action-btn:hover {
  background: var(--primary-container);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}
.msg-actions .reply-action-btn.pdf-btn:hover {
  color: #b91c1c;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}
.msg-actions .reply-action-btn.docx-btn:hover {
  color: #1d4ed8;
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.08);
}
.msg-actions .reply-action-btn.pptx-btn:hover {
  color: #b45309;
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}
.msg-actions .reply-action-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.msg-actions .reply-icon-only {
  width: 28px;
  padding: 0;
  justify-content: center;
}

/* Chapter Card Rich Presentation */
.chapter-rich-card {
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg, 12px);
  background: var(--surface);
  padding: 16px;
  margin-top: 10px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  width: 100%;
}
.chapter-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--outline-variant);
  padding-bottom: 12px;
  margin-bottom: 14px;
}
.chapter-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.chapter-title-group i {
  font-size: 20px;
  color: var(--primary);
}
.chapter-title-group h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--on-surface);
}
.chapter-badges {
  display: flex;
  gap: 6px;
}
.chapter-badge {
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface-container);
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
}
.chapter-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 16px 0;
  padding: 8px 12px;
  background: var(--surface-container-low, #f8fafc);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
}
[data-theme="dark"] .chapter-actions-bar {
  background: rgba(255, 255, 255, 0.03);
}
.chapter-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--outline-variant);
  background: var(--surface);
  color: var(--on-surface);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.chapter-action-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.chapter-action-btn.pdf:hover { background: #fef2f2; border-color: #ef4444; color: #b91c1c; }
.chapter-action-btn.docx:hover { background: #eff6ff; border-color: #3b82f6; color: #1d4ed8; }
.chapter-action-btn.pptx:hover { background: #fffbeb; border-color: #f59e0b; color: #b45309; }
.chapter-section {
  margin-bottom: 14px;
}
.chapter-section-heading {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.chapter-section-body {
  font-size: 13px;
  line-height: 1.55;
  color: var(--on-surface-variant);
}
.chapter-table-wrap {
  margin: 14px 0;
  overflow-x: auto;
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
}
.chapter-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  margin: 0;
}
.chapter-table-wrap th {
  background: var(--surface-container);
  color: var(--on-surface);
  font-weight: 600;
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--outline-variant);
}
.chapter-table-wrap td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
}
.chapter-chart-panel {
  background: var(--surface-container-low, #f8fafc);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  padding: 12px 14px;
  margin: 14px 0;
}
[data-theme="dark"] .chapter-chart-panel {
  background: rgba(255, 255, 255, 0.02);
}
.chapter-chart-title {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 8px;
}
.chapter-chart-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 12px;
}
.chapter-chart-lbl {
  width: 120px;
  color: var(--on-surface-variant);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chapter-chart-outer {
  flex: 1;
  height: 14px;
  background: var(--surface-container-high, #e2e8f0);
  border-radius: 4px;
  overflow: hidden;
}
[data-theme="dark"] .chapter-chart-outer {
  background: #334155;
}
.chapter-chart-inner {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.4s ease;
}
.chapter-chart-val {
  width: 50px;
  text-align: right;
  font-weight: 700;
  color: var(--primary);
}

/* Typing */
.typing-indicator { display:flex; align-items:center; gap:10px; padding:10px 16px; align-self:flex-start; background:var(--surface); border-radius:var(--radius-lg); border:1px solid var(--outline-variant); margin-left:16px; margin-bottom:8px; animation:msg-in .3s ease; }
.typing-avatar { width:28px; height:28px; border-radius:50%; background:var(--gradient-primary); display:flex; align-items:center; justify-content:center; color:white; font-size:13px; }
.typing-dots { display:flex; gap:4px; }
.typing-dots span { width:7px; height:7px; background:var(--primary); border-radius:50%; animation:typing-bounce 1.4s infinite ease-in-out; }
.typing-dots span:nth-child(2){animation-delay:.2s} .typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes typing-bounce { 0%,80%,100%{transform:scale(.6);opacity:.4} 40%{transform:scale(1);opacity:1} }
.typing-text { font-size:12px; color:var(--on-surface-variant); font-weight:500; }
.typing-body { display:flex; flex-direction:column; gap:6px; min-width:180px; max-width:380px; }
.typing-status { display:flex; align-items:center; gap:8px; font-size:12px; color:var(--on-surface-variant); font-weight:500; }
.typing-status i { color:var(--primary); font-size:11px; }
.typing-status .typing-dots { margin-left:2px; }
.skeleton-lines { display:flex; flex-direction:column; gap:6px; }
.skeleton-lines span { display:block; height:9px; border-radius:6px; background:linear-gradient(90deg, var(--surface-variant) 25%, rgba(148,163,184,.35) 50%, var(--surface-variant) 75%); background-size:400% 100%; animation:skeleton-shimmer 1.4s ease infinite; }
.skeleton-lines span:nth-child(2){ width:88%; }
.skeleton-lines span:nth-child(3){ width:64%; }
@keyframes skeleton-shimmer { 0%{background-position:100% 50%} 100%{background-position:0 50%} }
@media (prefers-reduced-motion: reduce) { .skeleton-lines span { animation:none; } }

/* Module Cards */
/* flex-shrink:0 is required: main is a flex column, and an item with
   overflow:hidden loses its automatic min-size and collapses to ~0px. */
.module-card { flex-shrink:0; background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:16px; margin-top:8px; width:100%; animation:msg-in .3s ease; box-shadow:var(--shadow-sm); transition:all .15s; }
.module-card:hover { box-shadow:var(--shadow-md); border-color:var(--primary); }
.module-card h4 { font-size:14px; font-weight:600; margin-bottom:10px; display:flex; align-items:center; gap:8px; }
.module-card .card-content { font-size:13px; color:var(--on-surface-variant); line-height:1.5; }
.pubmed-result { padding:10px 12px; border-radius:var(--radius-md); background:var(--surface-container); font-size:12px; margin-bottom:8px; border-left:3px solid var(--outline); transition:all .15s; }
.pubmed-result:hover { background:var(--surface-variant); transform:translateX(2px); }
.pubmed-result .pmid { font-weight:700; color:var(--primary); margin-left:8px; }
.poster-card { border:1px solid var(--outline-variant); border-radius:var(--radius-lg); overflow:hidden; margin-top:8px; background:var(--surface); box-shadow:var(--shadow-md); }
.poster-card img { width:100%; display:block; transition:transform .5s; }
.poster-card:hover img { transform:scale(1.02); }
.poster-card .poster-info { padding:14px; font-size:13px; }
.chapter-card { background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:14px; margin-top:8px; font-size:13px; box-shadow:var(--shadow-sm); }
.chapter-card .section-item { padding:8px 0; border-bottom:1px solid var(--outline-variant); }
.chapter-card .section-item:last-child { border-bottom:none; }
.thesis-card { background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:14px; margin-top:8px; box-shadow:var(--shadow-sm); }
.thesis-card .thesis-item { padding:10px 12px; border-radius:var(--radius-md); background:var(--surface-container); margin-bottom:8px; font-size:12px; cursor:pointer; transition:all .15s; border-left:3px solid var(--primary); }
.thesis-card .thesis-item:hover { background:var(--primary-container); transform:translateX(4px); }
.counsel-options { display:flex; flex-direction:column; gap:8px; }
.counsel-card { padding:12px; border-radius:var(--radius-md); background:var(--surface-container); font-size:12px; transition:all .15s; border-left:3px solid var(--tertiary); }
.counsel-card:hover { background:var(--tertiary-container); transform:translateX(4px); }
.counsel-card .institute { font-weight:700; color:var(--primary); display:block; margin-bottom:4px; }
.counsel-card .meta { color:var(--on-surface-variant); font-size:11px; }

/* Attachment */
.attachment-status { padding:8px 16px; background:var(--primary-container); color:var(--on-primary-container); font-size:12px; display:flex; align-items:center; justify-content:space-between; animation:slideDown .3s ease; }
@keyframes slideDown { from{transform:translateY(-100%);opacity:0} to{transform:translateY(0);opacity:1} }
.attachment-info { display:flex; align-items:center; gap:8px; }
.remove-btn { width:24px; height:24px; border-radius:50%; border:none; background:rgba(0,0,0,.1); color:inherit; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:10px; }
.remove-btn:hover { background:rgba(0,0,0,.2); }
.pdf-status { padding:8px 16px; background:var(--tertiary-container); color:var(--on-tertiary-container); font-size:12px; display:flex; align-items:center; justify-content:space-between; margin:4px 16px; border-radius:var(--radius-md); animation:slideDown .3s ease; }
.pdf-info { display:flex; align-items:center; gap:8px; }

/* Input */
.input-footer { padding:12px 16px calc(12px + env(safe-area-inset-bottom, 0px)); border-top:1px solid var(--outline-variant); background:var(--surface); }
.input-wrapper { display:flex; align-items:flex-end; gap:8px; background:var(--surface-container); border:2px solid var(--outline-variant); border-radius:var(--radius-xl); padding:6px 8px 6px 12px; transition:all .15s; }
.input-wrapper:focus-within { border-color:var(--primary); box-shadow:0 0 0 3px rgba(29,78,216,.1); background:var(--surface); }
.attach-btn { width:36px; height:36px; border-radius:50%; border:none; background:transparent; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:16px; color:var(--on-surface-variant); transition:all .15s; flex-shrink:0; }
.attach-btn:hover { background:var(--surface-variant); color:var(--primary); }
.input-field-wrapper { flex:1; min-width:0; }
textarea { width:100%; border:none; outline:none; padding:8px 0; font-size:14px; font-family:var(--font); resize:none; max-height:120px; background:transparent; color:var(--on-surface); line-height:1.5; }
textarea::placeholder { color:var(--on-surface-variant); }
.input-hint { display:flex; justify-content:space-between; padding:0 4px; font-size:10px; color:var(--on-surface-variant); opacity:0; transition:opacity .15s; }
.input-wrapper:focus-within .input-hint { opacity:1; }
.send-btn { width:38px; height:38px; border-radius:50%; border:none; background:var(--gradient-primary); color:white; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:14px; transition:all .15s; flex-shrink:0; box-shadow:0 2px 8px rgba(29,78,216,.3); }
.send-btn:hover:not(:disabled) { transform:scale(1.1); }
.send-btn:disabled { opacity:.4; cursor:default; box-shadow:none; }
.footer-info { display:flex; justify-content:space-between; padding:6px 4px 0; font-size:10px; color:var(--on-surface-variant); }

/* History Drawer */
.drawer-overlay { position:absolute; inset:0; background:rgba(0,0,0,.3); z-index:99; display:none; backdrop-filter:blur(4px); }
.drawer-overlay.open { display:block; }
.history-drawer { position:absolute; top:0; left:0; width:320px; height:100%; background:var(--surface); box-shadow:4px 0 16px rgba(0,0,0,.15); z-index:100; display:flex; flex-direction:column; transform:translateX(-100%); transition:transform .3s ease; }
.history-drawer.open { transform:translateX(0); }
.drawer-header { padding:16px; background:var(--gradient-primary); color:white; display:flex; justify-content:space-between; align-items:center; }
.drawer-header h3 { font-size:16px; font-weight:600; display:flex; align-items:center; gap:8px; }
.close-btn { width:32px; height:32px; border-radius:50%; border:none; background:rgba(255,255,255,.2); color:white; cursor:pointer; display:flex; align-items:center; justify-content:center; }
.close-btn:hover { background:rgba(255,255,255,.3); }
.search-box { padding:12px 16px; display:flex; align-items:center; gap:8px; border-bottom:1px solid var(--outline-variant); }
.search-box i { color:var(--on-surface-variant); }
.search-box input { flex:1; border:none; outline:none; font-size:13px; background:transparent; color:var(--on-surface); }
.session-list { flex:1; overflow-y:auto; padding:8px; }
.session-item { padding:12px; border-radius:var(--radius-md); cursor:pointer; display:flex; justify-content:space-between; align-items:center; margin-bottom:4px; transition:all .15s; }
.session-item:hover { background:var(--surface-variant); }
.session-item.active { background:var(--primary-container); }
.session-title { font-weight:600; font-size:13px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.session-time { font-size:11px; color:var(--on-surface-variant); }
.session-actions button { background:none; border:none; cursor:pointer; padding:4px; font-size:12px; border-radius:4px; color:var(--on-surface-variant); }
.session-actions button:hover { background:var(--outline-variant); color:var(--error); }
.empty-state { text-align:center; padding:40px 20px; color:var(--on-surface-variant); }
.empty-state i { font-size:48px; margin-bottom:12px; opacity:.3; }
.empty-state p { font-size:14px; font-weight:500; margin-bottom:4px; }
.empty-state small { font-size:12px; }

/* Export Menu */
.export-menu { position:absolute; bottom:100px; left:50%; transform:translateX(-50%); background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:8px; box-shadow:var(--shadow-xl); z-index:50; min-width:200px; animation:fadeInUp .2s ease; }
.export-header { padding:8px 12px; font-size:13px; font-weight:600; color:var(--on-surface-variant); border-bottom:1px solid var(--outline-variant); margin-bottom:4px; display:flex; align-items:center; gap:8px; }
.export-options { display:flex; flex-direction:column; gap:2px; }
.export-btn { display:flex; align-items:center; gap:10px; padding:10px 12px; border:none; background:transparent; border-radius:var(--radius-md); cursor:pointer; font-size:13px; color:var(--on-surface); transition:all .15s; width:100%; text-align:left; }
.export-btn:hover { background:var(--surface-variant); color:var(--primary); }
.export-btn i { width:20px; text-align:center; }

/* Toast */
.toast-container { position:fixed; bottom:calc(20px + env(safe-area-inset-bottom, 0px)); left:50%; transform:translateX(-50%); z-index:1000; display:flex; flex-direction:column; gap:8px; align-items:center; }
.toast { background:var(--on-surface); color:var(--surface); padding:10px 20px; border-radius:var(--radius-full); font-size:13px; font-weight:500; animation:toast-in .3s ease; box-shadow:var(--shadow-lg); }
@keyframes toast-in { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

/* ============================================================
   RESULTS EXPLORER  (Thesis / Counsellor / PubMed / Chapter)
   Compact cards + filters + search + pagination
   ============================================================ */
.explorer-card { padding:0; overflow:hidden; border:1px solid var(--outline-variant); }
.explorer-card:hover { box-shadow:var(--shadow-lg); border-color:var(--outline); }

.ex-head { display:flex; align-items:center; justify-content:space-between; gap:10px; padding:12px 14px; background:var(--gradient-primary); color:#fff; flex-wrap:wrap; }
.ex-head-left { display:flex; align-items:center; gap:9px; min-width:0; }
.ex-head-left i { font-size:15px; opacity:.95; }
.ex-title { font-size:14px; font-weight:700; letter-spacing:.2px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.ex-head-right { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-left:auto; }
.ex-actions-bar { display:inline-flex; align-items:center; gap:5px; flex-wrap:wrap; }
.ex-act-btn { display:inline-flex; align-items:center; gap:4px; padding:3px 9px; font-size:11px; font-weight:600; border-radius:6px; border:1px solid rgba(255,255,255,0.3); background:rgba(255,255,255,0.15); color:#ffffff; cursor:pointer; transition:all .15s; }
.ex-act-btn:hover { background:rgba(255,255,255,0.3); border-color:#ffffff; transform:translateY(-1px); }
.ex-act-btn.pdf-btn:hover { background:#ef4444; border-color:#ef4444; }
.ex-act-btn.docx-btn:hover { background:#3b82f6; border-color:#3b82f6; }
.ex-act-btn.pptx-btn:hover { background:#f97316; border-color:#f97316; }
.ex-count { font-size:11px; font-weight:600; background:rgba(255,255,255,.22); padding:3px 10px; border-radius:var(--radius-full); white-space:nowrap; }

.ex-stats { display:grid; grid-template-columns:repeat(auto-fit,minmax(88px,1fr)); gap:1px; background:var(--outline-variant); border-bottom:1px solid var(--outline-variant); }
.ex-stat { background:var(--surface); padding:10px 12px; display:flex; flex-direction:column; gap:2px; }
.ex-stat-num { font-size:17px; font-weight:800; line-height:1; color:var(--on-surface); }
.ex-stat-lbl { font-size:10px; font-weight:600; text-transform:uppercase; letter-spacing:.5px; color:var(--on-surface-variant); }
.ex-stat.s-safe .ex-stat-num { color:#059669; }
.ex-stat.s-target .ex-stat-num { color:#d97706; }
.ex-stat.s-dream .ex-stat-num { color:#7c3aed; }

.ex-toolbar { display:flex; flex-wrap:wrap; gap:8px; padding:10px 12px; border-bottom:1px solid var(--outline-variant); background:var(--surface-dim); align-items:center; }
.ex-filters { display:flex; gap:6px; flex-wrap:wrap; flex:1; min-width:0; }
.ex-filter { font-size:11.5px; font-weight:600; padding:5px 11px; border-radius:var(--radius-full); border:1px solid var(--outline-variant); background:var(--surface); color:var(--on-surface-variant); cursor:pointer; transition:all .15s; white-space:nowrap; }
.ex-filter:hover { border-color:var(--primary); color:var(--primary); }
.ex-filter.active { background:var(--primary); border-color:var(--primary); color:#fff; }
.ex-toolbar-right { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-left:auto; }
.ex-sort { display:inline-flex; align-items:center; gap:6px; background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-full); padding:4px 10px; font-size:11.5px; font-weight:600; color:var(--on-surface-variant); transition:all .15s; }
.ex-sort:hover { border-color:var(--primary); }
.ex-sort i { color:var(--primary); font-size:11px; }
.ex-sort select { border:none; outline:none; background:transparent; font-size:11.5px; font-weight:600; color:var(--on-surface); cursor:pointer; font-family:var(--font); padding-right:2px; }
.ex-sort select option { background:var(--surface); color:var(--on-surface); }
.ex-search { display:flex; align-items:center; gap:7px; background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-full); padding:5px 12px; min-width:170px; flex:1; max-width:280px; }
.ex-search i { color:var(--on-surface-variant); font-size:12px; }
.ex-search input { border:none; outline:none; background:transparent; font-size:12.5px; color:var(--on-surface); width:100%; font-family:var(--font); }

.ex-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:9px; padding:12px; }
.ex-card { position:relative; border:1px solid var(--outline-variant); border-radius:var(--radius-md); background:var(--surface); padding:10px 11px; display:flex; flex-direction:column; gap:6px; transition:all .16s; border-left:3px solid var(--outline); overflow:hidden; }
.ex-card:hover { transform:translateY(-2px); box-shadow:var(--shadow-md); border-color:var(--outline); }
.ex-card.chance-safe { border-left-color:#10b981; }
.ex-card.chance-target { border-left-color:#f59e0b; }
.ex-card.chance-dream { border-left-color:#8b5cf6; }
.ex-card-head { display:flex; align-items:flex-start; justify-content:space-between; gap:6px; }
.ex-card-title { font-size:12.8px; font-weight:700; line-height:1.35; color:var(--on-surface); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.ex-card-logo { width:32px; height:32px; min-width:32px; max-width:32px; object-fit:contain; border-radius:6px; background:#ffffff; border:1px solid var(--outline-variant); padding:2px; flex-shrink:0; box-shadow:0 1px 3px rgba(0,0,0,0.06); }
.ex-badge { flex-shrink:0; font-size:9.5px; font-weight:800; text-transform:uppercase; letter-spacing:.4px; padding:3px 8px; border-radius:var(--radius-full); }
.ex-badge.b-safe { background:#d1fae5; color:#065f46; }
.ex-badge.b-target { background:#fef3c7; color:#92400e; }
.ex-badge.b-dream { background:#ede9fe; color:#5b21b6; }
.ex-badge.b-neutral { background:var(--surface-variant); color:var(--on-surface-variant); }
.ex-badge.b-valid { background:#d1fae5; color:#065f46; }
.ex-badge.b-invalid { background:#fee2e2; color:#991b1b; }
[data-theme="dark"] .ex-badge.b-safe,[data-theme="dark"] .ex-badge.b-valid { background:#064e3b; color:#6ee7b7; }
[data-theme="dark"] .ex-badge.b-target { background:#78350f; color:#fcd34d; }
[data-theme="dark"] .ex-badge.b-dream { background:#3b1f6e; color:#c4b5fd; }
[data-theme="dark"] .ex-badge.b-invalid { background:#7f1d1d; color:#fca5a5; }
.ex-course { font-size:11.5px; font-weight:600; color:var(--primary); line-height:1.35; display:-webkit-box; -webkit-line-clamp:1; -webkit-box-orient:vertical; overflow:hidden; }
.ex-snippet { font-size:11.5px; line-height:1.45; color:var(--on-surface-variant); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.ex-meta { display:flex; flex-wrap:wrap; gap:4px 10px; margin-top:auto; padding-top:2px; }
.ex-meta span { display:inline-flex; align-items:center; gap:4px; font-size:10.5px; font-weight:500; color:var(--on-surface-variant); }
.ex-meta span i { font-size:10px; opacity:.85; }
.ex-note { padding:9px 14px; font-size:11.5px; line-height:1.55; color:var(--on-surface-variant); background:var(--surface-container); border-bottom:1px solid var(--outline-variant); white-space:pre-line; }
.ex-empty { padding:30px 16px; text-align:center; color:var(--on-surface-variant); font-size:13px; }
.ex-empty i { font-size:30px; display:block; margin-bottom:8px; opacity:.35; }

.ex-foot { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:8px; padding:10px 12px; border-top:1px solid var(--outline-variant); background:var(--surface-dim); }
.ex-pageinfo { font-size:11px; font-weight:500; color:var(--on-surface-variant); }
.ex-pageinfo b { color:var(--on-surface); }
.ex-pager { display:flex; align-items:center; gap:4px; flex-wrap:wrap; }
.ex-pg { min-width:28px; height:28px; padding:0 8px; border-radius:var(--radius-sm); border:1px solid var(--outline-variant); background:var(--surface); color:var(--on-surface-variant); font-size:12px; font-weight:600; cursor:pointer; display:inline-flex; align-items:center; justify-content:center; transition:all .14s; font-family:var(--font); }
.ex-pg:hover:not(:disabled):not(.active) { border-color:var(--primary); color:var(--primary); background:var(--primary-container); }
.ex-pg.active { background:var(--primary); border-color:var(--primary); color:#fff; cursor:default; }
.ex-pg:disabled { opacity:.4; cursor:not-allowed; }
.ex-pg.dots { border:none; background:transparent; cursor:default; color:var(--on-surface-variant); }
.ex-size { display:flex; align-items:center; gap:6px; font-size:11px; color:var(--on-surface-variant); }
.ex-size select { font-family:var(--font); font-size:11.5px; font-weight:600; padding:4px 8px; border-radius:var(--radius-sm); border:1px solid var(--outline-variant); background:var(--surface); color:var(--on-surface); cursor:pointer; }
@media(max-width:520px){ .ex-grid{grid-template-columns:1fr;gap:8px;padding:10px;} .ex-search{max-width:none;} .ex-head{padding:11px 12px;} }

/* ============ SKILL FORM (Thesis Counsellor) ============ */
.skill-form { position:absolute; inset:0; z-index:120; display:none; align-items:center; justify-content:center; padding:16px; background:rgba(15,23,42,.45); backdrop-filter:blur(4px); }
.skill-form.open { display:flex; animation:fadeInUp .2s ease; }
.sf-panel { width:100%; max-width:430px; max-height:92%; overflow-y:auto; background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); box-shadow:var(--shadow-xl); }
.sf-head { display:flex; align-items:center; justify-content:space-between; gap:10px; padding:14px 16px; background:var(--gradient-primary); color:#fff; border-radius:var(--radius-lg) var(--radius-lg) 0 0; }
.sf-head h3 { font-size:15px; font-weight:700; display:flex; align-items:center; gap:9px; }
.sf-tabs { display:flex; padding:10px 12px 0; gap:6px; }
.sf-tab { flex:1; font-size:12px; font-weight:600; padding:8px 6px; border-radius:var(--radius-md); border:1px solid var(--outline-variant); background:var(--surface-dim); color:var(--on-surface-variant); cursor:pointer; transition:all .15s; display:flex; align-items:center; justify-content:center; gap:6px; }
.sf-tab.active { background:var(--primary-container); border-color:var(--primary); color:var(--primary); }
.sf-body { padding:14px 16px 18px; display:flex; flex-direction:column; gap:12px; }
.sf-field { display:flex; flex-direction:column; gap:5px; }
.sf-field label { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.5px; color:var(--on-surface-variant); }
.sf-field input, .sf-field select { font-family:var(--font); font-size:13.5px; padding:9px 12px; border-radius:var(--radius-md); border:1px solid var(--outline-variant); background:var(--surface-dim); color:var(--on-surface); outline:none; transition:all .15s; }
.sf-field input:focus, .sf-field select:focus { border-color:var(--primary); background:var(--surface); box-shadow:0 0 0 3px rgba(29,78,216,.1); }
.sf-row { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.sf-submit { margin-top:2px; padding:11px 16px; border:none; border-radius:var(--radius-md); background:var(--gradient-primary); color:#fff; font-family:var(--font); font-size:13.5px; font-weight:700; cursor:pointer; display:flex; align-items:center; justify-content:center; gap:8px; box-shadow:0 4px 12px rgba(29,78,216,.28); transition:all .15s; }
.sf-submit:hover { transform:translateY(-1px); }
.sf-submit:disabled { opacity:.55; cursor:default; transform:none; }
.sf-hint { font-size:11px; color:var(--on-surface-variant); line-height:1.5; }
.sf-group { display:none; flex-direction:column; gap:12px; }
.sf-group.active { display:flex; }
@media(max-width:420px){ .sf-row{grid-template-columns:1fr;} }

/* Hidden */
.hidden { display:none !important; }

/* Scrollbar */
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--outline); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:var(--on-surface-variant); }

/* ==========================================================================
   Accessibility, focus, touch-target and reduced-motion additions.
   ========================================================================== */

/* Visually hidden, still read aloud by screen readers. Used for the live
   announcement region and for labels on inputs that only show a placeholder. */
.sr-only { position:absolute !important; width:1px; height:1px; padding:0; margin:-1px;
    overflow:hidden; clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap; border:0; }

/* Keyboard-only skip link: off-screen until it receives focus. */
.skip-link { position:absolute; left:8px; top:-60px; z-index:9999; padding:10px 14px;
    border-radius:var(--radius-md); background:var(--primary); color:#fff; font-size:13px;
    font-weight:600; text-decoration:none; transition:top .15s; }
.skip-link:focus { top:8px; }

/* .feature-card is now a real <button> so it is reachable and activatable from
   the keyboard. Buttons do not inherit font or colour the way a <div> does,
   which would otherwise swap the card text out of Inter -- restore both so the
   cards look identical to before. */
button.feature-card { font:inherit; color:inherit; width:100%; }

/* Visible focus ring for keyboard users only. :focus-visible does not match a
   mouse click, so pointer users keep the original look. */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, [tabindex]:focus-visible {
    outline:2px solid var(--primary);
    outline-offset:2px;
}

/* Shown beside Send only while a request is in flight. */
.stop-btn { width:38px; height:38px; border-radius:50%; flex-shrink:0; cursor:pointer;
    display:flex; align-items:center; justify-content:center; font-size:12px;
    border:1px solid var(--outline-variant); background:var(--surface-container);
    color:var(--on-surface); transition:all .15s; }
.stop-btn:hover { background:var(--surface-variant); border-color:var(--primary); color:var(--primary); }

/* Educational-use disclaimer under the composer. */
.disclaimer { margin:6px 2px 0; font-size:9.5px; line-height:1.5; text-align:center;
    color:var(--on-surface-variant); opacity:.85; }

/* The desktop controls are 36-38px, which is below the 44px minimum for a
   reliable tap target. Grow them only on coarse pointers / narrow screens so the
   mouse layout keeps its density. */
@media (pointer:coarse), (max-width:600px) {
    .icon-btn, .send-btn, .stop-btn, .attach-btn { width:44px; height:44px; min-width:44px; }
    .tool-chip, .quick-btn, .model-chip, .sf-tab { min-height:44px; }
    .sf-submit { min-height:48px; }
    .session-actions button { min-height:44px; min-width:44px; }
}

/* ==========================================================================
   College predictor cards: clickable, larger crest, closing-rank chip, compact.
   ========================================================================== */

/* Whole-card link. It sits above the card background but under nothing, so a
   click anywhere on the card opens the college site while remaining one
   focusable target with a single meaningful label for screen readers. */
.ex-card { cursor:pointer; }
.ex-card-hit { position:absolute; inset:0; z-index:1; border-radius:inherit; }
.ex-card-hit:focus-visible { outline:2px solid var(--primary); outline-offset:-3px; }

/* Compact: the predictor renders a dozen cards a page and candidates scan them,
   so trim padding, gaps and type by a notch while giving the crest more room. */
.ex-grid { gap:8px; padding:10px; grid-template-columns:repeat(auto-fill,minmax(248px,1fr)); }
.ex-card { padding:8px 9px; gap:4px; }
.ex-card-head { gap:8px; }
.ex-card-title { font-size:12px; line-height:1.3; }
.ex-course { font-size:11px; }
.ex-snippet { font-size:10.8px; line-height:1.45; -webkit-line-clamp:3; display:-webkit-box; -webkit-box-orient:vertical; overflow:hidden; }
.ex-card.has-pdf { min-height:140px; }
.ex-pdf-btn { display:inline-flex; align-items:center; gap:5px; padding:4px 10px; background:rgba(99,102,241,0.12); color:var(--primary,#6366f1); border:1px solid rgba(99,102,241,0.3); border-radius:6px; font-size:11px; font-weight:700; text-decoration:none; cursor:pointer; transition:all .15s ease; width:fit-content; }
.ex-pdf-btn:hover { background:var(--primary,#6366f1); color:#ffffff !important; border-color:var(--primary,#6366f1); box-shadow:0 2px 8px rgba(99,102,241,0.35); transform:translateY(-1px); }
.ex-meta { gap:3px 9px; padding-top:3px; }
.ex-meta span { font-size:10px; }
.ex-badge { font-size:9px; padding:2px 7px; }

/* Larger crest: the logo is the fastest way to recognise a college, so it gets
   44px rather than the original 28px the inline style forced. */
.ex-card-logo { width:44px; height:44px; min-width:44px; max-width:44px;
    border-radius:8px; padding:3px; }

/* The closing rank is the number a candidate actually scans for, so it gets its
   own emphasised chip instead of being buried in the meta row. */
.ex-cutoff { display:inline-flex; align-items:center; gap:4px; align-self:flex-start;
    padding:2px 7px; border-radius:var(--radius-full); background:var(--primary-container);
    color:var(--on-primary-container); font-size:10px; font-weight:700; white-space:nowrap; }
.ex-cutoff i { font-size:9px; opacity:.9; }

/* Marks a card as leaving the app. Kept tiny and low-contrast so it does not
   compete with the college name. */
.ex-card-ext { font-size:8px; opacity:.45; color:var(--primary); }

/* Honour the OS "reduce motion" setting. The particle field, pulse rings and
   typing dots run forever and are decorative, so they can be frozen outright;
   everything else is shortened rather than removed so state changes stay
   perceptible. */
@media (prefers-reduced-motion: reduce) {
    .particle, .pulse-ring, .typing-dots span, .logo-ring { animation:none !important; }
    *, *::before, *::after {
        animation-duration:.01ms !important;
        animation-iteration-count:1 !important;
        transition-duration:.01ms !important;
        scroll-behavior:auto !important;
    }
}

/* ===== Compact mobile (<=600px) ===== */
@media (max-width:600px){
  .app-header{padding:7px 10px;gap:6px}
  .header-left{gap:7px}
  .logo-wrapper{width:30px;height:30px}
  .logo-image{width:30px;height:30px}
  .header-info h1{font-size:13.5px;line-height:1.2}
  .status-text{display:none}
  .status-dot{width:6px;height:6px}
  .header-actions{gap:0}
  .header-actions .icon-btn{width:32px;height:32px;min-width:32px;font-size:13px;border-radius:8px}
  .model-chip{padding:4px 9px;font-size:11px;min-height:0;gap:4px}
  .tools-bar{padding:6px 8px;gap:5px}
  .tool-chip{padding:4px 10px;font-size:11px;min-height:0}
  main{padding:10px 8px;gap:8px}
  .welcome-screen{padding:14px 8px}
  .welcome-animation,.brain-icon{width:56px;height:56px;font-size:26px}
  .welcome-animation{margin-bottom:12px}
  .welcome-title{font-size:19px;margin-bottom:4px;text-align:center}
  .welcome-subtitle{font-size:12px;margin-bottom:14px;text-align:center}
  .feature-grid{grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:14px}
  .feature-card{padding:10px 8px;border-radius:12px}
  .feature-icon{width:32px;height:32px;font-size:15px;margin-bottom:6px}
  .feature-card h4{font-size:11.5px}
  .feature-card p{font-size:10px;line-height:1.35}
  .quick-actions{gap:6px}
  .quick-btn{padding:6px 10px;font-size:11px;min-height:0}
  .message{max-width:92%;padding:9px 12px;font-size:13px;line-height:1.5;border-radius:14px}
  .module-card{padding:12px;border-radius:12px}
  .input-footer{padding:8px 8px calc(8px + env(safe-area-inset-bottom,0px))}
  .input-wrapper{padding:4px 6px 4px 8px;border-radius:16px;gap:6px}
  .input-field-wrapper textarea{padding:6px 0;font-size:13.5px}
  .input-hint,.input-tip{display:none}
  .attach-btn{width:34px;height:34px;min-width:34px;font-size:14px}
  .send-btn,.stop-btn{width:38px;height:38px;min-width:38px}
  .footer-info{font-size:9px;padding:4px 2px 0}
  .disclaimer{font-size:8.5px;margin-top:3px}
  .history-drawer{width:min(300px,88vw)}
  .ex-grid{grid-template-columns:1fr 1fr;gap:7px;padding:8px}
  .ex-card{padding:7px 8px}
  .ex-card-logo{width:34px;height:34px;min-width:34px;max-width:34px}
  .ex-toolbar{padding:8px;gap:6px}
  .ex-search{min-width:0}
}
/* Very small phones: single-col explorer, tighter header */
@media (max-width:380px){
  .header-actions .icon-btn:nth-child(4){display:none}
  .ex-grid{grid-template-columns:1fr}
  .welcome-title{font-size:17px}
}

/* ===== Beautiful AI replies ===== */
.message.assistant{line-height:1.65}
.message.assistant h3{font-size:16.5px;font-weight:800;line-height:1.3;margin:2px 0 8px;color:var(--on-surface);background:var(--gradient-primary);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.message.assistant h4{font-size:14.5px;font-weight:750;margin:10px 0 6px;color:var(--primary);display:flex;align-items:center;gap:6px}
.message.assistant h4::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--gradient-primary);display:inline-block;flex-shrink:0}
.message.assistant p{margin:0 0 8px;font-size:13.8px}
.message.assistant p:last-child,.message.assistant ul:last-child{margin-bottom:0}
.message.assistant ul{margin:0 0 8px;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px}
.message.assistant li{position:relative;padding:7px 10px 7px 28px;background:var(--surface-container);border-radius:10px;font-size:13px;line-height:1.5}
.message.assistant li::before{content:"\2713";position:absolute;left:9px;top:8px;font-size:11px;font-weight:800;color:var(--primary)}
.message.assistant strong.hl{background:var(--primary-container);color:var(--on-primary-container);padding:1px 6px;border-radius:6px;font-weight:700}
@media(max-width:600px){.message.assistant h3{font-size:15px}.message.assistant h4{font-size:13.5px}.message.assistant p,.message.assistant li{font-size:12.8px}}

/* ===== ChatGPT-Style Wikipedia Visual Gallery (At least 3 Large Images & Horizontal Scroll) ===== */
.wiki-gallery-container {
  width: 100%;
  margin: 12px 0 16px 0;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg, 16px);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  position: relative;
  animation: msg-in 0.3s ease;
}
.wiki-gallery-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--outline-variant);
}
.wiki-gallery-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--on-surface);
}
.wiki-gallery-title i {
  color: var(--primary);
  font-size: 16px;
}
.wiki-count-badge {
  font-size: 11px;
  background: var(--primary-container);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.wiki-gallery-arrows {
  display: flex;
  gap: 6px;
}
.wiki-arrow-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container);
  color: var(--on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 11px;
  transition: all 0.15s ease;
}
.wiki-arrow-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.wiki-carousel-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--outline) transparent;
  -webkit-overflow-scrolling: touch;
}
.wiki-carousel-track::-webkit-scrollbar {
  height: 6px;
}
.wiki-carousel-track::-webkit-scrollbar-thumb {
  background: var(--outline);
  border-radius: 4px;
}
.wiki-large-card {
  flex: 0 0 290px;
  width: 290px;
  scroll-snap-align: start;
  border: 1px solid var(--outline-variant);
  border-radius: 12px;
  background: var(--surface-container-low, #f8fafc);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}
[data-theme="dark"] .wiki-large-card {
  background: #1e293b;
}
.wiki-large-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.wiki-img-wrapper {
  position: relative;
  width: 100%;
  height: 190px;
  background: #0f172a;
  overflow: hidden;
}
.wiki-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  cursor: pointer;
  transition: transform 0.35s ease;
}
.wiki-large-card:hover .wiki-img-wrapper img {
  transform: scale(1.05);
}
.wiki-card-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.wiki-card-meta {
  padding: 12px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 6px;
}
.wiki-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--on-surface);
  text-decoration: none;
  line-height: 1.35;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.wiki-card-title:hover {
  color: var(--primary);
}
.wiki-card-title i {
  font-size: 10px;
  opacity: 0.7;
}
.wiki-card-desc {
  font-size: 11.5px;
  color: var(--on-surface-variant);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}
@media (max-width: 600px) {
  .wiki-large-card {
    flex: 0 0 250px;
    width: 250px;
  }
  .wiki-img-wrapper {
    height: 160px;
  }
}


/* ===== MediGyaan App & Login Buttons ===== */
.welcome-app-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 18px auto 26px;
    max-width: 600px;
}
.welcome-app-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 13.5px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}
.welcome-app-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}
.btn-login-medigyaan {
    background: linear-gradient(135deg, #1d4ed8, #3b82f6);
    color: #ffffff !important;
}
.btn-android-install {
    background: #10b981;
    color: #ffffff !important;
}
.btn-android-install:hover {
    background: #059669;
}
.btn-ios-install {
    background: #1e293b;
    color: #ffffff !important;
}
.btn-ios-install:hover {
    background: #0f172a;
}
.header-login-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 50px;
    background: linear-gradient(135deg, #1d4ed8, #3b82f6);
    color: #ffffff !important;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(29, 78, 216, 0.25);
}
.header-login-btn:hover {
    transform: scale(1.04);
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35);
}
.header-app-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
@media (max-width: 600px) {
    .welcome-app-actions {
        gap: 8px;
    }
    .welcome-app-btn {
        width: 100%;
        justify-content: center;
        padding: 9px 16px;
        font-size: 13px;
    }
}

/* ===== AUTH MODAL & USER CHIP STYLES ===== */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 1;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
.auth-modal-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.auth-modal-card {
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 400px;
    padding: 30px 26px;
    box-shadow: var(--shadow-xl);
    position: relative;
    transform: scale(1);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    animation: auth-modal-pop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes auth-modal-pop {
    from { opacity: 0; transform: scale(0.92) translateY(12px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.auth-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--surface-variant);
    color: var(--on-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.15s;
}
.auth-close-btn:hover {
    background: var(--outline-variant);
    color: var(--on-surface);
}
.auth-modal-header {
    text-align: center;
    margin-bottom: 22px;
}
.auth-logo-wrapper {
    position: relative;
    width: 54px;
    height: 54px;
    margin: 0 auto 12px;
}
.auth-logo-img {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    object-fit: contain;
    position: relative;
    z-index: 2;
}
.auth-logo-ring {
    position: absolute;
    inset: -4px;
    border-radius: 18px;
    border: 2px solid var(--primary);
    opacity: 0.4;
    animation: logo-pulse 3s infinite ease-out;
}
.auth-modal-header h3 {
    font-size: 19px;
    font-weight: 750;
    color: var(--on-surface);
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}
.auth-subtitle {
    font-size: 12.5px;
    color: var(--on-surface-variant);
    line-height: 1.45;
}
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.auth-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #ef4444;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    line-height: 1.4;
    text-align: center;
}
.auth-error.hidden { display: none; }
.auth-input-group label {
    display: block;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--on-surface-variant);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.auth-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}
.input-icon {
    position: absolute;
    left: 12px;
    color: var(--on-surface-variant);
    font-size: 13.5px;
    pointer-events: none;
}
.auth-input-wrapper input {
    width: 100%;
    padding: 10px 38px 10px 36px;
    border-radius: var(--radius-md);
    border: 1px solid var(--outline);
    background: var(--surface-dim);
    color: var(--on-surface);
    font-size: 13.5px;
    font-family: inherit;
    transition: all 0.15s;
}
.auth-input-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}
.pwd-toggle-btn {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    color: var(--on-surface-variant);
    cursor: pointer;
    padding: 4px;
    font-size: 13px;
}
.auth-submit-btn {
    margin-top: 6px;
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--gradient-primary);
    color: #ffffff;
    font-size: 14px;
    font-weight: 650;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(29, 78, 216, 0.3);
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.auth-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(29, 78, 216, 0.4);
}
.auth-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}
.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 16px 0 12px;
    color: var(--on-surface-variant);
    font-size: 12px;
}
.auth-divider::before, .auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--outline-variant);
}
.auth-divider span {
    padding: 0 10px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.auth-footer-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: center;
}
.auth-guest-btn {
    background: var(--surface-variant);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    padding: 10px;
    border-radius: var(--radius-md);
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.auth-guest-btn:hover {
    background: var(--surface-container);
    border-color: var(--outline);
}
.auth-links {
    font-size: 12px;
    color: var(--on-surface-variant);
}
.auth-register-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    margin-left: 4px;
}
.auth-register-link:hover { text-decoration: underline; }

/* User Chip in Header */
.header-login-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 50px;
    background: var(--gradient-primary);
    color: #ffffff;
    font-size: 11.5px;
    font-weight: 650;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(29, 78, 216, 0.25);
}
.header-login-pill:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35);
}
.user-chip-wrapper {
    position: relative;
    display: inline-block;
}
.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px 4px 6px;
    border-radius: 50px;
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    max-width: 130px;
}
.user-chip:hover {
    background: var(--surface-variant);
    border-color: var(--primary);
}
.user-chip-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}
.user-chip-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11.5px;
}
.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 170px;
    padding: 6px;
    z-index: 100;
    animation: dropdown-pop 0.15s ease-out;
}
.user-menu-dropdown.hidden { display: none; }
@keyframes dropdown-pop {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}
.user-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--on-surface);
    font-size: 12.5px;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}
.user-menu-item:hover {
    background: var(--surface-variant);
    color: var(--primary);
}
.user-menu-item.logout {
    color: var(--error);
    border-top: 1px solid var(--outline-variant);
    margin-top: 4px;
    padding-top: 8px;
}

/* ===== ROBUST COMPACT MOBILE RESPONSIVENESS ===== */
@media (max-width: 680px) {
    .app-header {
        padding: 8px 10px;
        gap: 6px;
    }
    .header-left {
        gap: 8px;
        min-width: 0;
        flex: 1;
    }
    .logo-wrapper {
        width: 32px;
        height: 32px;
    }
    .logo-image {
        width: 32px;
        height: 32px;
        border-width: 1.5px;
    }
    .header-info h1 {
        font-size: 14px;
        line-height: 1.2;
    }
    .status-text {
        display: none;
    }
    .header-actions {
        gap: 4px;
        flex-shrink: 0;
    }
    .header-actions .icon-btn {
        width: 32px;
        height: 32px;
        min-width: 32px;
        font-size: 13px;
        border-radius: 8px;
    }
    .model-chip {
        display: none; /* Hide model chip on tiny screens to avoid header mangling */
    }
    .header-login-pill {
        padding: 4px 9px;
        font-size: 11px;
        gap: 4px;
    }
    .user-chip {
        max-width: 90px;
        padding: 3px 6px;
    }
    .user-chip-avatar {
        width: 20px;
        height: 20px;
        font-size: 10px;
    }

    /* Keep tools bar on ONE single smooth horizontal scrollable line */
    .tools-bar {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
        padding: 6px 8px !important;
        gap: 5px !important;
    }
    .tools-bar::-webkit-scrollbar { display: none !important; }
    .tool-chip {
        flex-shrink: 0 !important;
        padding: 5px 10px !important;
        font-size: 11px !important;
        white-space: nowrap !important;
    }

    /* Welcome screen compact layout */
    .welcome-screen {
        padding: 16px 10px;
    }
    .welcome-animation, .brain-icon {
        width: 50px;
        height: 50px;
    }
    .welcome-title {
        font-size: 18px;
        margin-bottom: 4px;
    }
    .welcome-subtitle {
        font-size: 11.5px;
        margin-bottom: 14px;
    }
    .welcome-app-actions {
        margin: 12px 0 18px;
        gap: 6px;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    .welcome-app-btn {
        padding: 8px 10px;
        font-size: 11.5px;
        justify-content: center;
        border-radius: 10px;
        box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    }
    .welcome-app-actions .btn-login-medigyaan {
        grid-column: span 2;
        padding: 9px 12px;
        font-size: 12.5px;
    }
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
        margin-bottom: 12px;
    }
    .feature-card {
        padding: 8px 6px;
        border-radius: 10px;
    }
    .feature-icon {
        width: 28px;
        height: 28px;
        font-size: 13px;
        margin-bottom: 4px;
    }
    .feature-card h4 {
        font-size: 11px;
    }
    .feature-card p {
        font-size: 9.5px;
        line-height: 1.3;
    }
    .quick-actions {
        gap: 5px;
    }
    .quick-btn {
        padding: 5px 8px;
        font-size: 10.5px;
    }

    /* Chat input bar safe spacing */
    .input-footer {
        padding: 6px 8px calc(6px + env(safe-area-inset-bottom, 0px));
    }
    .input-wrapper {
        padding: 3px 6px 3px 8px;
        border-radius: 16px;
    }
    .input-field-wrapper textarea {
        font-size: 14px;
        padding: 6px 0;
    }
}


/* ===== ULTRA-COMPACT HEADER & SINGLE-LINE SIGN IN FIX ===== */
.app-header {
    padding: 6px 12px !important;
    min-height: 44px !important;
    gap: 8px !important;
}
.header-left {
    gap: 8px !important;
    min-width: 0 !important;
    flex-shrink: 1 !important;
}
.logo-wrapper, .logo-image {
    width: 30px !important;
    height: 30px !important;
}
.header-info h1 {
    font-size: 14px !important;
    line-height: 1.2 !important;
    white-space: nowrap !important;
}
.status-text {
    font-size: 10px !important;
}
.header-actions {
    display: flex !important;
    align-items: center !important;
    gap: 5px !important;
    flex-shrink: 0 !important;
}
.header-actions .icon-btn {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    font-size: 13px !important;
    padding: 0 !important;
}
.model-chip {
    padding: 3px 8px !important;
    font-size: 11px !important;
    height: 28px !important;
}

/* STRICT SINGLE-LINE SIGN IN PILL */
.header-login-pill {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-direction: row !important;
    white-space: nowrap !important;
    word-break: keep-all !important;
    flex-shrink: 0 !important;
    height: 30px !important;
    line-height: 30px !important;
    padding: 0 13px !important;
    border-radius: 50px !important;
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
    font-size: 12px !important;
    font-weight: 650 !important;
    border: none !important;
    cursor: pointer !important;
    gap: 6px !important;
    box-shadow: 0 2px 8px rgba(29, 78, 216, 0.25) !important;
    transition: all 0.15s ease !important;
}
.header-login-pill * {
    white-space: nowrap !important;
    word-break: keep-all !important;
}
.header-login-pill span {
    display: inline-block !important;
    white-space: nowrap !important;
    word-break: keep-all !important;
}
.header-login-pill i {
    font-size: 13px !important;
    flex-shrink: 0 !important;
}
.header-login-pill:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35) !important;
}

/* Explicit Modal visibility rules */
#login-modal.hidden {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}
#login-modal:not(.hidden) {
    display: flex !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

@media (max-width: 600px) {
    .app-header {
        padding: 5px 8px !important;
        gap: 5px !important;
    }
    .header-left {
        gap: 6px !important;
    }
    .header-info h1 {
        font-size: 13px !important;
    }
    .status-text {
        display: none !important;
    }
    .model-chip {
        display: none !important; /* Hide model chip on mobile for extreme compactness */
    }
    .header-login-pill {
        padding: 0 10px !important;
        height: 28px !important;
        font-size: 11px !important;
        gap: 4px !important;
    }
}


/* Logged-in Log Out button state */
.header-login-pill.logged-in {
    background: var(--surface-container) !important;
    color: var(--error) !important;
    border: 1px solid var(--outline-variant) !important;
    box-shadow: none !important;
}
.header-login-pill.logged-in:hover {
    background: rgba(239, 68, 68, 0.12) !important;
    border-color: var(--error) !important;
    color: var(--error) !important;
}
.welcome-app-btn.logged-in {
    background: var(--surface-container) !important;
    color: var(--error) !important;
    border: 1px solid var(--outline-variant) !important;
}
.welcome-app-btn.logged-in:hover {
    background: rgba(239, 68, 68, 0.12) !important;
    border-color: var(--error) !important;
}

/* ===== TABBED AUTH MODAL & GOOGLE SIGN-IN ===== */
.auth-tabs {
    display: flex;
    background: var(--surface-dim);
    padding: 3px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    border: 1px solid var(--outline-variant);
}
.auth-tab {
    flex: 1;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--on-surface-variant);
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
}
.auth-tab.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* Google Sign In Button */
.auth-google-btn {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--outline);
    background: var(--surface);
    color: var(--on-surface);
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.15s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 12px;
}
.auth-google-btn:hover {
    background: var(--surface-variant);
    border-color: var(--outline);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}
.google-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Register Button on Welcome Hero */
.btn-register-medigyaan {
    background: var(--surface-container) !important;
    color: var(--primary) !important;
    border: 1px solid var(--outline-variant) !important;
}
.btn-register-medigyaan:hover {
    background: var(--surface-variant) !important;
    border-color: var(--primary) !important;
    color: var(--primary) !important;
}

@media (max-width: 600px) {
    .auth-modal-card {
        padding: 24px 18px;
        max-width: 95%;
    }
    .auth-tab {
        padding: 7px 8px;
        font-size: 12px;
    }
}


/* ==========================================================================
   SIDEBAR FOOTER & CHATGPT-STYLE SETTINGS MODAL
   ========================================================================== */

/* Dynamic Font Sizing for Chat */
:root {
    --chat-font-size: 14px;
}
.message p, .message li, .message-content, .message pre code {
    font-size: var(--chat-font-size) !important;
}

/* Sidebar (History Drawer) Footer */
.drawer-footer {
    padding: 12px 14px;
    border-top: 1px solid var(--outline-variant);
    background: var(--surface-container);
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
    margin-top: auto;
}

.sidebar-user-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background 0.15s ease;
    user-select: none;
}
.sidebar-user-card:hover {
    background: var(--surface-variant);
}
.sidebar-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
    overflow: hidden;
}
.sidebar-user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.sidebar-user-details {
    flex: 1;
    min-width: 0;
}
.sidebar-user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}
.sidebar-user-sub {
    font-size: 11px;
    color: var(--on-surface-variant);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.drawer-footer-divider {
    height: 1px;
    background: var(--outline-variant);
    margin: 4px 0;
}

.drawer-footer-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 12px;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--on-surface);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease;
    box-sizing: border-box;
}
.drawer-footer-btn:hover {
    background: var(--surface-variant);
    color: var(--primary);
}
.drawer-footer-btn i:first-child {
    font-size: 14px;
    width: 18px;
    text-align: center;
    color: var(--on-surface-variant);
    transition: color 0.15s ease;
}
.drawer-footer-btn:hover i:first-child {
    color: var(--primary);
}
.drawer-footer-btn .link-ext-icon {
    margin-left: auto;
    font-size: 11px;
    opacity: 0.5;
}

/* Privacy Link in Sidebar - Highlighted */
.drawer-privacy-link {
    color: var(--on-surface);
}
.drawer-privacy-link:hover {
    color: var(--primary);
}

/* ==================== SETTINGS MODAL ==================== */
.settings-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
.settings-modal.open {
    opacity: 1;
    pointer-events: auto;
}

.settings-panel {
    width: min(720px, 95vw);
    max-height: min(680px, 88vh);
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: 18px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.22);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(12px) scale(0.98);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.settings-modal.open .settings-panel {
    transform: translateY(0) scale(1);
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--outline-variant);
    background: var(--surface-container);
}
.settings-header-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    color: var(--on-surface);
}
.settings-header-title i {
    color: var(--primary);
    font-size: 17px;
}

.settings-layout {
    display: flex;
    flex: 1;
    min-height: 0;
    background: var(--surface);
}

/* Settings Sidebar Tabs (ChatGPT Style) */
.settings-nav {
    width: 190px;
    border-right: 1px solid var(--outline-variant);
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: var(--surface-container-low, var(--surface));
    flex-shrink: 0;
}
.settings-nav-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--on-surface-variant);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
}
.settings-nav-btn:hover {
    background: var(--surface-variant);
    color: var(--on-surface);
}
.settings-nav-btn.active {
    background: var(--primary-container);
    color: var(--primary);
    font-weight: 600;
}
.settings-nav-btn i {
    font-size: 14px;
    width: 16px;
    text-align: center;
}

/* Settings Content Body */
.settings-content {
    flex: 1;
    min-width: 0;
    padding: 20px 24px;
    overflow-y: auto;
}
.settings-tab-panel {
    display: none;
    flex-direction: column;
    gap: 16px;
    animation: fadeInTab 0.18s ease;
}
.settings-tab-panel.active {
    display: flex;
}
@keyframes fadeInTab {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Settings Row Items */
.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--outline-variant);
    gap: 16px;
}
.setting-row:last-child {
    border-bottom: none;
}
.setting-info {
    flex: 1;
    min-width: 0;
}
.setting-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--on-surface);
    line-height: 1.3;
}
.setting-desc {
    font-size: 12px;
    color: var(--on-surface-variant);
    margin-top: 3px;
    line-height: 1.4;
}

/* Segmented Buttons (Theme, Font Size) */
.settings-segmented {
    display: inline-flex;
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 3px;
    flex-shrink: 0;
}
.settings-seg-btn {
    border: none;
    background: transparent;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--on-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s ease;
}
.settings-seg-btn:hover {
    color: var(--on-surface);
}
.settings-seg-btn.active {
    background: var(--surface);
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

/* Dropdown Selectors */
.settings-select {
    padding: 8px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--outline-variant);
    background: var(--surface-container);
    color: var(--on-surface);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    cursor: pointer;
    min-width: 160px;
    transition: border-color 0.15s;
}
.settings-select:focus {
    border-color: var(--primary);
}

/* iOS/ChatGPT Style Toggle Switch */
.settings-toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.settings-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}
.settings-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--outline-variant);
    transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 24px;
}
.settings-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.settings-toggle input:checked + .settings-slider {
    background-color: var(--primary);
}
.settings-toggle input:checked + .settings-slider:before {
    transform: translateX(20px);
}

/* Action Buttons in Settings */
.settings-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--outline-variant);
    background: var(--surface-container);
    color: var(--on-surface);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}
.settings-btn:hover {
    background: var(--surface-variant);
    border-color: var(--outline);
}
.settings-btn.danger {
    background: #fee2e2;
    color: #b91c1c;
    border-color: #fca5a5;
}
.settings-btn.danger:hover {
    background: #fecaca;
}
[data-theme="dark"] .settings-btn.danger {
    background: #450a0a;
    color: #fca5a5;
    border-color: #7f1d1d;
}
[data-theme="dark"] .settings-btn.danger:hover {
    background: #7f1d1d;
    color: white;
}

/* Persona Cards Grid */
.persona-cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 8px;
}
.persona-card {
    border: 1.5px solid var(--outline-variant);
    border-radius: 12px;
    padding: 12px;
    background: var(--surface-container);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.persona-card:hover {
    border-color: var(--primary);
    background: var(--surface-variant);
}
.persona-card.active {
    border-color: var(--primary);
    background: var(--primary-container);
}
.persona-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--on-surface);
}
.persona-card.active .persona-card-header {
    color: var(--primary);
}
.persona-card-desc {
    font-size: 11px;
    color: var(--on-surface-variant);
    line-height: 1.35;
}

/* Privacy & Legal Card */
.legal-card {
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.legal-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--on-surface);
    display: flex;
    align-items: center;
    gap: 8px;
}
.legal-title i {
    color: var(--primary);
}
.legal-text {
    font-size: 12px;
    color: var(--on-surface-variant);
    line-height: 1.5;
}
.legal-meta-item {
    font-size: 12px;
    color: var(--on-surface);
    display: flex;
    gap: 6px;
}
.legal-meta-item strong {
    color: var(--on-surface-variant);
}

/* Responsive (Mobile <= 640px) */
@media (max-width: 640px) {
    .settings-panel {
        max-height: 92vh;
        border-radius: 16px;
    }
    .settings-layout {
        flex-direction: column;
    }
    .settings-nav {
        width: 100%;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--outline-variant);
        overflow-x: auto;
        padding: 8px;
        scrollbar-width: none;
    }
    .settings-nav::-webkit-scrollbar {
        display: none;
    }
    .settings-nav-btn {
        padding: 8px 12px;
        white-space: nowrap;
        width: auto;
        font-size: 12px;
    }
    .settings-content {
        padding: 16px;
    }
    .setting-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .persona-cards-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Clickable RAG citations + cited-page viewer (2026-10-22) ---------- */
a.rag-cite {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    max-width: 100%;
    margin: 0 2px;
    padding: 1px 9px 1px 7px;
    border-radius: 999px;
    border: 1px solid var(--outline-variant, #cfd8e3);
    background: var(--surface-container, #eef4f8);
    color: var(--primary);
    font-size: 0.8em;
    font-weight: 600;
    line-height: 1.75;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: baseline;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
a.rag-cite .rag-cite-icon {
    width: 12px;
    height: 12px;
    flex: 0 0 auto;
    opacity: 0.85;
}
a.rag-cite:hover,
a.rag-cite:focus-visible {
    background: var(--primary-container);
    border-color: var(--primary);
    box-shadow: 0 1px 5px rgba(29, 78, 216, 0.18);
    text-decoration: none;
    outline: none;
}
a.rag-cite:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
a.rag-cite:active { box-shadow: none; }

/* Inline links inside an answer (web-source footer, cited URLs). */
.message a.link-out {
    color: var(--primary);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    overflow-wrap: anywhere;
}
.message a.link-out:hover,
.message a.link-out:focus-visible {
    text-decoration-thickness: 2px;
}

/* ---------- Exa web source cards under a chat answer ---------- */
.web-sources { margin: 10px 0 4px; }
.web-sources-head {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.4px;
    text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px;
}
.web-sources-list {
    display: flex; gap: 10px; overflow-x: auto; padding-bottom: 6px;
    scroll-snap-type: x proximity; -webkit-overflow-scrolling: touch;
}
.web-sources-list::-webkit-scrollbar { height: 6px; }
.web-sources-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.web-source-card {
    flex: 0 0 230px; max-width: 230px; scroll-snap-align: start;
    display: flex; flex-direction: column; gap: 6px;
    padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px;
    background: var(--surface); color: var(--ink); text-decoration: none;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.web-source-card:hover,
.web-source-card:focus-visible {
    border-color: var(--primary); box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transform: translateY(-1px); text-decoration: none;
}
.web-source-card:active { transform: translateY(0); }
.web-source-top {
    display: flex; align-items: center; justify-content: space-between; gap: 6px;
    font-size: 0.68rem; font-weight: 700; color: var(--primary);
}
.web-source-top i { font-size: 0.62rem; opacity: 0.75; }
.web-source-host {
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    letter-spacing: 0.2px;
}
.web-source-title {
    font-size: 0.8rem; line-height: 1.35; color: var(--ink);
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
    overflow: hidden;
}
[data-theme="dark"] .web-source-card { background: var(--surface-2); }

/* ---------- PubMed literature search results ---------- */
.lit-list { display: flex; flex-direction: column; gap: 10px; margin: 10px 0 4px; }
.lit-head {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.4px;
    text-transform: uppercase; color: var(--ink-3);
}
.lit-card {
    display: block; padding: 12px 14px; border: 1px solid var(--border);
    border-radius: 10px; background: var(--surface); color: var(--ink);
    text-decoration: none;
    transition: border-color var(--transition), transform var(--transition);
}
.lit-card:hover, .lit-card:focus-visible {
    border-color: var(--primary); transform: translateY(-1px); text-decoration: none;
}
.lit-card:active { transform: translateY(0); }
.lit-title { font-weight: 700; font-size: 0.86rem; line-height: 1.35; }
.lit-meta {
    margin-top: 6px; font-size: 0.72rem; color: var(--ink-3);
    display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
}
.lit-pmid {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    background: var(--surface-2); padding: 1px 6px; border-radius: 6px;
}
.lit-empty { font-size: 0.85rem; color: var(--ink-3); margin: 0; }
.lit-link { display: block; color: inherit; text-decoration: none; }
.lit-link:hover, .lit-link:focus-visible { text-decoration: none; }
.lit-actions {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;
    padding-top: 9px; border-top: 1px dashed var(--border);
}
.lit-act {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 11px; border-radius: 999px; cursor: pointer;
    border: 1px solid var(--border); background: var(--surface-2);
    color: var(--ink); font-size: 0.74rem; font-weight: 700;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.lit-act i { font-size: 0.7rem; color: var(--primary); }
.lit-act:hover, .lit-act:focus-visible {
    border-color: var(--primary); color: var(--primary); background: var(--surface);
}
.lit-act:active { transform: translateY(1px); }
.lit-act:disabled { opacity: .5; cursor: default; }

/* ---------- PICO result card ---------- */
.pico-card {
    margin: 12px 0 4px; padding: 12px 14px; border: 1px solid var(--border);
    border-radius: 10px; background: var(--surface);
}
.pico-head {
    display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.4px;
    text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px;
}
.pico-design {
    text-transform: none; letter-spacing: 0; font-size: 0.68rem;
    background: var(--primary-light); color: var(--primary);
    padding: 2px 8px; border-radius: 999px;
}
.pico-row {
    display: grid; grid-template-columns: 18px 92px 1fr; gap: 8px;
    align-items: baseline; padding: 5px 0; border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
}
.pico-row:last-of-type { border-bottom: none; }
.pico-key {
    font-weight: 800; color: var(--primary); font-size: 0.78rem;
}
.pico-label { color: var(--ink-3); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.3px; }
.pico-value { color: var(--ink); line-height: 1.4; }
.pico-q { margin: 10px 0 0; font-size: 0.82rem; font-style: italic; color: var(--ink); }
.pico-keywords { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.pico-kw {
    font-size: 0.7rem; padding: 3px 9px; border-radius: 999px;
    background: var(--surface-2); color: var(--ink-3); border: 1px solid var(--border);
}
.pico-note { margin: 8px 0 0; font-size: 0.74rem; color: var(--ink-3); }
[data-theme="dark"] .pico-card, [data-theme="dark"] .lit-act { background: var(--surface-2); }

/* ---------- Model badge: which model answered (very small) ---------- */
.model-badge {
    font-size: 0.58rem; line-height: 1.2; color: var(--ink-3);
    opacity: 0.7; margin: -2px 0 10px 4px; letter-spacing: 0.2px;
    user-select: none; pointer-events: none;
}
[data-theme="dark"] .model-badge { opacity: 0.62; }

/* ---------- Research tools panel (PICO + sample size) ---------- */
body.panel-open { overflow: hidden; }
.rp-overlay {
    position: fixed; inset: 0; z-index: 1200; display: none;
    align-items: center; justify-content: center; padding: 16px;
    background: rgba(0, 0, 0, 0.45);
}
.rp-overlay.open { display: flex; }
.rp-panel {
    width: min(560px, 100%); max-height: 88vh; overflow: auto;
    background: var(--surface); border-radius: 14px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}
.rp-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.rp-head h3 { margin: 0; font-size: 0.98rem; display: flex; align-items: center; gap: 8px; }
.rp-tabs { display: flex; gap: 6px; padding: 10px 16px 0; }
.rp-tab {
    display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
    padding: 8px 12px; border-radius: 999px; border: 1px solid var(--border);
    background: var(--surface-2); color: var(--ink-3);
    font-size: 0.78rem; font-weight: 700;
}
.rp-tab.active { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.rp-body { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px 18px; }
.rp-body.hidden { display: none; }
.rp-label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.35px; text-transform: uppercase; color: var(--ink-3); }
.rp-body textarea, .rp-body select, .rp-body input {
    width: 100%; box-sizing: border-box; padding: 9px 11px;
    border: 1px solid var(--border); border-radius: 9px;
    background: var(--surface); color: var(--ink); font: inherit; font-size: 0.86rem;
}
.rp-body textarea { resize: vertical; min-height: 96px; }
/* Field grid: two-up while there is room, one column as soon as the panel itself
   gets narrow (phones, and phones rendering in desktop mode where the viewport
   breakpoint below never fires). */
.rp-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; }
.rp-field { display: flex; flex-direction: column; gap: 4px; font-size: 0.72rem; font-weight: 600; color: var(--ink-3); }
.rp-field.hidden { display: none; }
.rp-submit {
    align-self: flex-start; display: inline-flex; align-items: center; gap: 8px;
    margin-top: 4px; padding: 9px 16px; border: none; border-radius: 999px;
    background: var(--gradient-primary); color: #fff; font-size: 0.82rem; font-weight: 700;
    cursor: pointer;
}
.rp-submit:hover { filter: brightness(1.05); }

/* ---------- Sample size result card ---------- */
.ss-card {
    margin: 12px 0 4px; padding: 12px 14px; border: 1px solid var(--border);
    border-radius: 10px; background: var(--surface);
}
.ss-head {
    display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
    margin-bottom: 10px; font-size: 0.72rem; font-weight: 700;
    letter-spacing: 0.4px; text-transform: uppercase; color: var(--ink-3);
}
.ss-design {
    text-transform: none; letter-spacing: 0; font-size: 0.68rem;
    background: var(--primary-light); color: var(--primary);
    padding: 2px 8px; border-radius: 999px;
}
.ss-row {
    display: flex; justify-content: space-between; gap: 12px;
    padding: 5px 0; border-bottom: 1px solid var(--border); font-size: 0.82rem;
}
.ss-row:last-of-type { border-bottom: none; }
.ss-row .k { color: var(--ink-3); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.3px; }
.ss-row .v { font-weight: 700; }
.ss-formula { margin: 10px 0 0; font-size: 0.74rem; color: var(--ink-3); font-family: ui-monospace, Menlo, monospace; }
.ss-assumptions { margin: 8px 0 0; padding-left: 18px; font-size: 0.74rem; color: var(--ink-3); }
[data-theme="dark"] .ss-card { background: var(--surface-2); }
@media (max-width: 600px) {
    /* id-scoped so it still wins over the later panel-polish block */
    .rp-grid, #research-panel .rp-grid { grid-template-columns: 1fr; }
    .rp-panel { max-height: 92vh; }
}

/* Panel polish: fields must look editable, and the close affordance visible */
#research-panel .rp-panel { border: 1px solid var(--border); }
#research-panel .rp-body input,
#research-panel .rp-body select,
#research-panel .rp-body textarea {
    background: var(--surface-2);
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.03);
}
#research-panel .rp-body input:focus,
#research-panel .rp-body select:focus,
#research-panel .rp-body textarea:focus {
    outline: none;
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
#research-panel .rp-body input::placeholder { color: var(--ink-3); opacity: 0.7; }
#research-panel .close-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; padding: 0; border-radius: 8px;
    border: 1px solid var(--border); background: var(--surface-2);
    color: var(--ink); font-size: 1.05rem; line-height: 1; cursor: pointer;
}
#research-panel .close-btn:hover,
#research-panel .close-btn:focus-visible {
    border-color: var(--primary); color: var(--primary);
    background: var(--primary-light);
}
#research-panel .rp-head h3 i { color: var(--primary); }

/* Horizontal card rails: keep a sliver of the next card visible on touch */
.web-sources-list { padding-right: 12px; scroll-padding-right: 12px; }
@media (max-width: 600px) {
    .web-sources-list { gap: 8px; }
    .web-source-card { flex: 0 0 82%; max-width: 82%; }
}
@media (max-width: 600px) {
    .pico-row { grid-template-columns: 16px 1fr; }
    .pico-label { grid-column: 2; }
    .pico-value { grid-column: 2; }
}

[data-theme="dark"] .lit-card { background: var(--surface-2); }
@media (max-width: 600px) {
    .lit-card { padding: 10px 12px; }
    .lit-title { font-size: 0.82rem; }
}
@media (max-width: 600px) {
    .web-source-card { flex: 0 0 78%; max-width: 78%; }
}
a.rag-cite .rag-cite-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
[data-theme="dark"] a.rag-cite {
    background: rgba(125, 211, 252, 0.12);
    border-color: rgba(125, 211, 252, 0.4);
    color: #7dd3fc;
}
[data-theme="dark"] a.rag-cite:hover,
[data-theme="dark"] a.rag-cite:focus-visible {
    background: rgba(125, 211, 252, 0.22);
    border-color: #7dd3fc;
}
@media print {
    a.rag-cite { border: none; padding: 0; background: none; color: inherit; }
    a.rag-cite .rag-cite-icon { display: none; }
}

.rag-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 23, 42, 0.78);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    backdrop-filter: blur(3px);
}
.rag-modal.hidden {
    display: none;
}
.rag-modal-box {
    background: var(--surface);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: 16px;
    overflow: hidden;
    width: min(940px, 96vw);
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}
.rag-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--outline-variant);
    background: var(--surface-container);
}
.rag-modal-title {
    font-weight: 600;
    font-size: 14px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.rag-modal-close {
    background: none;
    border: none;
    color: var(--on-surface-variant);
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 8px;
    flex: none;
}
.rag-modal-close:hover {
    background: var(--surface-variant);
    color: var(--on-surface);
}
.rag-modal-body {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    min-height: 0;
    background: var(--surface-dim);
}
.rag-img-wrap {
    flex: 1;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    border-radius: 10px;
    background: var(--surface-variant);
}
.rag-img {
    max-width: 100%;
    max-height: 74vh;
    display: block;
    border-radius: 6px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}
.rag-img.hidden,
.rag-loader.hidden {
    display: none;
}
.rag-loader {
    color: var(--on-surface-variant);
    font-size: 26px;
    padding: 40px;
}
.rag-nav {
    background: var(--surface);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 16px;
    cursor: pointer;
    flex: none;
}
.rag-nav:hover:not(:disabled) {
    background: var(--primary-container);
    color: var(--on-primary-container);
}
.rag-nav:disabled {
    opacity: 0.35;
    cursor: default;
}
.rag-modal-foot {
    padding: 8px 16px;
    font-size: 12px;
    color: var(--on-surface-variant);
    border-top: 1px solid var(--outline-variant);
    text-align: center;
}
@media (max-width: 560px) {
    .rag-nav {
        width: 32px;
        height: 32px;
        font-size: 13px;
    }
    .rag-img-wrap {
        min-height: 220px;
    }
}

/* ---------- Book-figure gallery under an answer (2026-10-22) ---------- */
.rag-figs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 12px 0 6px;
    padding: 10px;
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: 12px;
}
.rag-fig {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    width: 118px;
    padding: 8px 6px;
    margin: 0;
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: 10px;
    cursor: pointer;
    font: inherit;
    color: inherit;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.rag-fig:hover,
.rag-fig:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.28);
    outline: none;
    border-color: var(--primary);
}
.rag-fig img {
    max-width: 104px;
    max-height: 96px;
    object-fit: contain;
    border-radius: 6px;
    background: #ffffff; /* book figures are dark-on-light scans */
    display: block;
}
.rag-fig-cap {
    font-size: 10px;
    line-height: 1.3;
    color: var(--on-surface-variant);
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    max-height: 40px;
    word-break: break-word;
}
@media (max-width: 560px) {
    .rag-fig {
        width: 96px;
    }
    .rag-fig img {
        max-width: 84px;
        max-height: 80px;
    }
}