:root,
[data-theme-mode="dark"] {
  --bg-main: #0b0c0e;
  --bg-card: #131518;
  --bg-surface: #131518;
  --bg-elevated: #1a1d22;
  --bg-card-hover: #1a1d22;
  --bg-glass: rgba(19, 21, 24, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --border-gold: #c69234;
  --gold-primary: #d4af37;
  --gold-glow: rgba(212, 175, 55, 0.25);
  --gold-light: #f5e6a3;
  --text-main: #f4f5f7;
  --text-muted: #8e939e;
  --text-faint: rgba(244, 245, 247, 0.25);
  --text-gold: #f4c062;
  --accent-blue: #388bfd;
  --header-bg: linear-gradient(180deg, #131518 0%, #0b0c0e 100%);
  --stage-bg: radial-gradient(circle, #101726 0%, #06090f 100%);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-main: 0 10px 30px rgba(0, 0, 0, 0.7);
  --font-serif: "Cinzel", "Georgia", serif;
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Geist Mono", SFMono-Regular, Consolas, monospace;
}

/* 1. Blueprint Precision (Industrial Technical) */
[data-theme-mode="blueprint"] {
  --bg-main: #0a1628;
  --bg-card: #102038;
  --bg-surface: #102038;
  --bg-elevated: #162c4d;
  --bg-card-hover: #1f3b64;
  --bg-glass: rgba(16, 32, 56, 0.88);
  --border-color: rgba(104, 178, 248, 0.18);
  --border-hover: rgba(104, 178, 248, 0.35);
  --border-gold: #e8a317;
  --gold-primary: #e8a317;
  --gold-glow: rgba(232, 163, 23, 0.25);
  --gold-light: #fce2a6;
  --text-main: #f4f6f9;
  --text-muted: #8ba9c4;
  --text-faint: rgba(244, 246, 249, 0.25);
  --text-gold: #e8a317;
  --accent-blue: #68b2f8;
  --header-bg: linear-gradient(180deg, #102038 0%, #0a1628 100%);
  --stage-bg: radial-gradient(circle, #102544 0%, #081220 100%);
}

/* 2. Forged Heritage (Storytelling Legacy) */
[data-theme-mode="heritage"] {
  --bg-main: #161616;
  --bg-card: #1f1e1d;
  --bg-surface: #1f1e1d;
  --bg-elevated: #2a2927;
  --bg-card-hover: #363431;
  --bg-glass: rgba(31, 30, 29, 0.88);
  --border-color: rgba(139, 111, 71, 0.25);
  --border-hover: rgba(139, 111, 71, 0.45);
  --border-gold: #c4823f;
  --gold-primary: #c4823f;
  --gold-glow: rgba(196, 130, 63, 0.25);
  --gold-light: #fbe3aa;
  --text-main: #f5f1ea;
  --text-muted: #a89f91;
  --text-faint: rgba(245, 241, 234, 0.25);
  --text-gold: #c4823f;
  --accent-blue: #b83a2f;
  --header-bg: linear-gradient(180deg, #1f1e1d 0%, #161616 100%);
  --stage-bg: radial-gradient(circle, #242220 0%, #121212 100%);
}

/* 3. Flow & Connection (Network Visualization) */
[data-theme-mode="flow"] {
  --bg-main: #0b1120;
  --bg-card: #111c33;
  --bg-surface: #111c33;
  --bg-elevated: #172644;
  --bg-card-hover: #1f335b;
  --bg-glass: rgba(17, 28, 51, 0.88);
  --border-color: rgba(34, 211, 238, 0.2);
  --border-hover: rgba(34, 211, 238, 0.4);
  --border-gold: #22d3ee;
  --gold-primary: #22d3ee;
  --gold-glow: rgba(34, 211, 238, 0.25);
  --gold-light: #a5f3fc;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-faint: rgba(248, 250, 252, 0.25);
  --text-gold: #22d3ee;
  --accent-blue: #3b82f6;
  --header-bg: linear-gradient(180deg, #111c33 0%, #0b1120 100%);
  --stage-bg: radial-gradient(circle, #102142 0%, #080d19 100%);
}

[data-theme-mode="linen"] {
  --bg-main: #f5f2eb;
  --bg-card: #ffffff;
  --bg-surface: #ffffff;
  --bg-elevated: #ede7dc;
  --bg-card-hover: #fcfbfa;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-color: rgba(44, 38, 30, 0.1);
  --border-hover: rgba(44, 38, 30, 0.22);
  --border-gold: #9a7322;
  --gold-primary: #9a7322;
  --gold-glow: rgba(154, 115, 34, 0.15);
  --gold-light: #735313;
  --text-main: #1d1914;
  --text-muted: #6e675d;
  --text-faint: rgba(29, 25, 20, 0.25);
  --text-gold: #9a7322;
  --accent-blue: #2563eb;
  --header-bg: linear-gradient(180deg, #ffffff 0%, #f5f2eb 100%);
  --stage-bg: radial-gradient(circle, #eae5db 0%, #ded7cb 100%);
}

[data-theme-mode="light"] {
  --bg-main: #f4f5f7;
  --bg-card: #ffffff;
  --bg-surface: #ffffff;
  --bg-elevated: #eaedf1;
  --bg-card-hover: #f9fafb;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(15, 23, 42, 0.18);
  --border-gold: #a17822;
  --gold-primary: #a17822;
  --gold-glow: rgba(161, 120, 34, 0.15);
  --gold-light: #755512;
  --text-main: #0f141c;
  --text-muted: #5e6878;
  --text-faint: rgba(15, 20, 28, 0.25);
  --text-gold: #a17822;
  --accent-blue: #2563eb;
  --header-bg: linear-gradient(180deg, #ffffff 0%, #f4f5f7 100%);
  --stage-bg: radial-gradient(circle, #e9ecf0 0%, #dfe3e8 100%);
}

.auth-guarantee {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #10b981;
}

.back-link {
  color: var(--gold-primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

.back-link:hover {
  opacity: 0.8;
}

/* Header Top Bar & Appearance Switcher */
.header-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 12px;
}

.appearance-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  padding: 2px;
  border-radius: 9999px;
  gap: 2px;
}

.appearance-pill {
  background: transparent;
  border: 0;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 180ms ease;
  line-height: 1;
}

.appearance-pill:hover {
  color: var(--text-main);
}

.appearance-pill.active {
  background: var(--bg-card);
  color: var(--gold-primary);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 240ms ease, color 240ms ease;
}

/* Engineering Atmospheric Backgrounds */
[data-theme-mode="blueprint"] body {
  background-color: var(--bg-main);
  background-image: 
    linear-gradient(to right, rgba(104, 178, 248, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(104, 178, 248, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

[data-theme-mode="heritage"] body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(196, 130, 63, 0.06), transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(139, 111, 71, 0.05), transparent 45%);
}

[data-theme-mode="flow"] body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(34, 211, 238, 0.08), transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(59, 130, 246, 0.06), transparent 45%);
}

[data-theme-mode="linen"] body {
  background-color: var(--bg-main);
  background-image: radial-gradient(#d6cebe 0.75px, transparent 0.75px);
  background-size: 16px 16px;
}

/* Header */
.site-header {
  background: var(--header-bg);
  border-bottom: 2px solid var(--border-gold);
  padding: 20px 20px 18px;
  text-align: center;
  position: relative;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.header-badge {
  display: inline-block;
  background: rgba(229, 169, 60, 0.12);
  border: 1px solid var(--border-gold);
  color: var(--gold-light);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.college-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  letter-spacing: 1.5px;
  color: #ffffff;
  text-transform: uppercase;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0,0,0,0.8);
  margin-bottom: 6px;
}

.sub-title {
  font-size: 1.05rem;
  color: var(--text-gold);
  font-weight: 500;
  letter-spacing: 1px;
}

.header-meta {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.header-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* App Container */
.app-container {
  max-width: 1640px;
  width: 96vw;
  margin: 0 auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Toolbar */
.toolbar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-main);
}

.search-box {
  flex: 1;
  min-width: 260px;
  position: relative;
}

.search-input {
  width: 100%;
  background: #090d14;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 14px 10px 38px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  outline: none;
  transition: all 0.2s;
}

.search-input:focus {
  border-color: var(--gold-primary);
  box-shadow: 0 0 0 2px rgba(229, 169, 60, 0.2);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.view-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.control-btn {
  background: #1c2638;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.control-btn:hover {
  background: #25334c;
  border-color: #3f5271;
}

.control-btn.active {
  background: var(--gold-primary);
  color: #0b0f17;
  font-weight: 600;
  border-color: var(--gold-primary);
}

/* Stage & Photo Viewer */
.stage-wrapper {
  background: #06090f;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.7);
  position: relative;
}

.stage-header {
  background: #0e1420;
  border-bottom: 1px solid var(--border-color);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.zoom-hud {
  display: flex;
  gap: 6px;
}

.hud-btn {
  background: #192233;
  border: 1px solid #2e3e57;
  color: var(--text-main);
  width: 32px;
  height: 30px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  cursor: pointer;
}

.hud-btn:hover {
  background: #26344d;
  color: var(--gold-primary);
}

/* 35th Jubilee Style Bar */
.theme-bar-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.theme-bar-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.theme-bar-title {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.theme-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.theme-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 9999px;
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.theme-pill:hover {
  border-color: var(--border-hover);
  color: var(--text-main);
  transform: translateY(-1px);
}

.theme-pill.active {
  background: #23262d;
  border-color: var(--gold-primary);
  color: var(--gold-light);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.2);
}

.share-card-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 9999px;
  padding: 6px 16px;
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.share-card-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

/* Stage Main Area & Ambient Side Reels */
.stage-main-area {
  display: flex;
  position: relative;
  width: 100%;
  height: 640px;
  overflow: hidden;
  background: var(--stage-bg);
}

.stage-main-area .photo-viewport {
  flex: 1;
  height: 100%;
  position: relative;
}

.ambient-reel {
  width: 195px;
  min-width: 195px;
  height: 100%;
  background: rgba(10, 16, 26, 0.78);
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 20;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
              min-width 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
              opacity 0.25s ease, 
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.ambient-reel-right {
  border-right: none;
  border-left: 1px solid var(--border-color);
}

[data-theme-mode="linen"] .ambient-reel {
  background: rgba(245, 242, 235, 0.92);
}

[data-theme-mode="light"] .ambient-reel {
  background: rgba(244, 245, 247, 0.92);
}

/* Hidden / Collapsed State */
.stage-main-area.reels-collapsed .ambient-reel-left {
  width: 0 !important;
  min-width: 0 !important;
  opacity: 0 !important;
  transform: translateX(-100%);
  pointer-events: none;
  border: none;
}

.stage-main-area.reels-collapsed .ambient-reel-right {
  width: 0 !important;
  min-width: 0 !important;
  opacity: 0 !important;
  transform: translateX(100%);
  pointer-events: none;
  border: none;
}

.reel-header {
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.25);
  flex-shrink: 0;
}

[data-theme-mode="linen"] .reel-header,
[data-theme-mode="light"] .reel-header {
  background: rgba(255, 255, 255, 0.6);
}

.reel-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(232, 163, 23, 0.15);
  color: var(--gold-primary);
  font-weight: 700;
  border: 1px solid rgba(232, 163, 23, 0.25);
}

.reel-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.reel-viewport {
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Gradient fade masks for seamless infinite reel */
.reel-viewport::before,
.reel-viewport::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 28px;
  z-index: 5;
  pointer-events: none;
}

.reel-viewport::before {
  top: 0;
  background: linear-gradient(180deg, var(--bg-main) 0%, transparent 100%);
}

.reel-viewport::after {
  bottom: 0;
  background: linear-gradient(0deg, var(--bg-main) 0%, transparent 100%);
}

.reel-track {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 8px;
}

.ambient-reel-left .reel-track {
  animation: reel-scroll-up 50s linear infinite;
}

.ambient-reel-right .reel-track {
  animation: reel-scroll-down 50s linear infinite;
}

.reel-track:hover {
  animation-play-state: paused;
}

@keyframes reel-scroll-up {
  0% { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}

@keyframes reel-scroll-down {
  0% { transform: translateY(-50%); }
  100% { transform: translateY(0); }
}

.milestone-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 7px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.milestone-card:hover {
  transform: translateY(-2px) scale(1.02);
  border-color: var(--gold-primary);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

.milestone-card-img {
  width: 100%;
  aspect-ratio: 320 / 220;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #0a1628;
  object-fit: cover;
}

.milestone-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--gold-primary);
}

.milestone-card-title {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
}

.milestone-card-formula {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--accent-blue, #68b2f8);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: rgba(0, 0, 0, 0.2);
  padding: 2px 4px;
  border-radius: 3px;
}

[data-theme-mode="linen"] .milestone-card-formula,
[data-theme-mode="light"] .milestone-card-formula {
  background: rgba(0, 0, 0, 0.05);
}

/* Responsive adjustments for ambient side reels */
@media (min-width: 820px) and (max-width: 1199px) {
  .ambient-reel {
    width: 135px;
    min-width: 135px;
  }
  .milestone-card {
    padding: 5px;
  }
  .milestone-card-title {
    font-size: 0.68rem;
  }
  .milestone-card-meta {
    font-size: 0.58rem;
  }
  .milestone-card-formula {
    display: none;
  }
}

@media (max-width: 819px) {
  .ambient-reel {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reel-track {
    animation: none !important;
    overflow-y: auto;
  }
}

.photo-viewport {
  position: relative;
  width: 100%;
  height: 640px;
  overflow: hidden;
  cursor: grab;
  user-select: none;
  background: var(--stage-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.photo-viewport.grabbing {
  cursor: grabbing;
}

.photo-canvas {
  position: relative;
  transform-origin: center center;
  transition: transform 0.12s ease-out;
  display: inline-block;
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
}

/* Theme Frame Container & Photo Mount */
.theme-frame-container {
  position: relative;
  display: inline-block;
  transition: all 0.2s ease;
}

.theme-frame-container.themed {
  width: 1000px;
  height: 797px; /* 1000 * 1212 / 1520 */
  max-width: 92vw;
  max-height: 85vh;
}

.theme-frame-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
}

.photo-mount-area {
  position: relative;
  width: 100%;
  height: 100%;
}

.theme-frame-container.themed .photo-mount-area {
  position: absolute;
  left: 10.526%; /* 160 / 1520 */
  top: 13.201%;  /* 160 / 1212 */
  width: 78.947%;/* 1200 / 1520 */
  height: 73.597%;/* 892 / 1212 */
}

.theme-frame-container.themed .main-image {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: fill;
  border-radius: 0;
}

.main-image {
  display: block;
  max-width: 100%;
  max-height: 600px;
  height: auto;
  border-radius: 4px;
  pointer-events: none;
}

/* Hotspots / Face Pins */
.face-hotspots-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.face-pin {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 2px solid transparent;
  pointer-events: auto;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.face-pin::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px dashed rgba(229, 169, 60, 0);
  transition: all 0.25s;
}

.face-pin:hover,
.face-pin.highlighted {
  border-color: var(--gold-primary);
  background: radial-gradient(circle, rgba(229, 169, 60, 0.3) 0%, rgba(229, 169, 60, 0.05) 70%, transparent 100%);
  box-shadow: 0 0 18px var(--gold-glow);
  z-index: 50;
}

.face-pin:hover::after,
.face-pin.highlighted::after {
  border-color: var(--gold-light);
  animation: pulse-ring 2s infinite linear;
}

.face-pin.active-selected {
  border-color: #388bfd;
  background: radial-gradient(circle, rgba(56, 139, 253, 0.4) 0%, transparent 70%);
  box-shadow: 0 0 25px rgba(56, 139, 253, 0.8);
  z-index: 60;
}

.face-pin.dimmed {
  opacity: 0.2;
}

@keyframes pulse-ring {
  0% { transform: scale(1) rotate(0deg); opacity: 0.8; }
  50% { transform: scale(1.18) rotate(180deg); opacity: 0.3; }
  100% { transform: scale(1) rotate(360deg); opacity: 0.8; }
}

/* Hover Tooltip & Name Overlay */
.face-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  z-index: 100;
  text-align: center;
}

.face-pin:hover .face-tooltip,
.face-pin.highlighted .face-tooltip,
.photo-canvas.show-all-names .face-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.tooltip-name {
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.85rem;
  line-height: 1.2;
}

.tooltip-row {
  font-size: 0.72rem;
  color: var(--gold-primary);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* Info Banner */
.info-banner {
  background: #111724;
  border-left: 4px solid var(--gold-primary);
  padding: 12px 18px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.info-banner strong {
  color: var(--gold-light);
}

/* Roster Section */
.roster-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.roster-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.roster-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.roster-count {
  font-size: 0.85rem;
  background: #1e293b;
  color: var(--text-gold);
  padding: 2px 10px;
  border-radius: 12px;
  font-family: var(--font-sans);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-tab {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-tab:hover {
  color: var(--text-main);
  border-color: #3b4e6d;
}

.filter-tab.active {
  background: #1c2638;
  color: var(--gold-primary);
  border-color: var(--border-gold);
  font-weight: 600;
}

/* Grid of Alumni Cards */
.alumni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.alumni-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
}

.alumni-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

.alumni-card.highlighted {
  border-color: var(--gold-primary);
  box-shadow: 0 0 18px var(--gold-glow);
  background: #182234;
}

.card-avatar {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 2px solid var(--border-gold);
  object-fit: cover;
  background: #090d14;
  flex-shrink: 0;
  box-shadow: 0 3px 8px rgba(0,0,0,0.5);
}

.card-content {
  flex: 1;
  min-width: 0;
}

.card-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 2px;
}

.card-row {
  font-size: 0.76rem;
  color: var(--text-gold);
  margin-top: 2px;
}

.card-role-tag {
  display: inline-block;
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 4px;
  background: #1e2b40;
  color: #9cb1cf;
}

.card-role-tag.faculty {
  background: rgba(229, 169, 60, 0.15);
  color: var(--gold-light);
  border: 1px solid rgba(229, 169, 60, 0.3);
}

.card-action-hint {
  color: var(--text-muted);
  font-size: 0.75rem;
  opacity: 0;
  transition: opacity 0.2s;
}

.alumni-card:hover .card-action-hint {
  opacity: 1;
}

/* Modal Drawer (Then & Now Profile) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 12, 0.85);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.profile-modal {
  background: #121926;
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.25s ease;
}

.modal-overlay.open .profile-modal {
  transform: translateY(0);
}

.modal-header {
  padding: 20px 24px;
  background: #162030;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title-box h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: #fff;
}

.modal-title-box p {
  color: var(--text-gold);
  font-size: 0.85rem;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}

.close-modal-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* Then & Now Comparison */
.then-now-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.photo-card {
  background: #0b0f17;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
  position: relative;
}

.photo-card-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--gold-light);
}

.photo-card-img {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  margin: 0 auto 10px;
  display: block;
  object-fit: cover;
  border: 3px solid var(--border-gold);
  box-shadow: 0 4px 15px rgba(0,0,0,0.6);
}

.photo-card-note {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Current photo upload placeholder */
.current-photo-placeholder {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  margin: 0 auto 10px;
  border: 2px dashed #3a4b67;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  background: #111824;
  transition: all 0.2s;
  padding: 10px;
  text-align: center;
}

.current-photo-placeholder:hover {
  border-color: var(--gold-primary);
  color: var(--gold-light);
  background: #162030;
}

/* Profile Form fields */
.profile-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-group.full-width {
  grid-column: 1 / -1;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field-input,
.field-textarea {
  background: #090d14;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.field-input:focus,
.field-textarea:focus {
  border-color: var(--gold-primary);
}

.field-textarea {
  resize: vertical;
  min-height: 70px;
}

.modal-footer {
  padding: 16px 24px;
  background: #162030;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.save-profile-btn {
  background: var(--gold-primary);
  color: #0b0f17;
  font-weight: 700;
  border: none;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.save-profile-btn:hover {
  background: #f1b74c;
  box-shadow: 0 4px 14px rgba(229, 169, 60, 0.4);
}

.spotlight-jump-btn {
  background: #1e2a3c;
  border: 1px solid #374a68;
  color: #fff;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
}

.spotlight-jump-btn:hover {
  background: #28374e;
  border-color: var(--gold-primary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 24px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 30px;
}

.site-footer p {
  margin-bottom: 6px;
}

/* Calibration Helper Toast */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1a2536;
  border: 1px solid var(--border-gold);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0,0,0,0.7);
  z-index: 2000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .college-title {
    font-size: 1.35rem;
  }
  .sub-title {
    font-size: 0.95rem;
  }
  .photo-viewport {
    height: 400px;
  }
  .then-now-container {
    grid-template-columns: 1fr;
  }
  .profile-fields {
    grid-template-columns: 1fr;
  }
}

/* Milestone Modal & Nostalgia Card */
.milestone-modal {
  max-width: 620px;
}

[data-theme-mode="linen"] .profile-modal,
[data-theme-mode="linen"] .milestone-modal {
  background: #ffffff;
  border-color: var(--border-gold);
}

[data-theme-mode="linen"] .modal-header {
  background: #f7f4ed;
}

[data-theme-mode="linen"] .modal-title-box h3 {
  color: #1d1914;
}

[data-theme-mode="light"] .profile-modal,
[data-theme-mode="light"] .milestone-modal {
  background: #ffffff;
  border-color: var(--border-gold);
}

[data-theme-mode="light"] .modal-header {
  background: #f0f3f6;
}

[data-theme-mode="light"] .modal-title-box h3 {
  color: #0f141c;
}

.milestone-era-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-primary);
  background: rgba(232, 163, 23, 0.12);
  border: 1px solid rgba(232, 163, 23, 0.25);
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 6px;
  font-weight: 700;
}

.milestone-modal-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.milestone-schematic-wrap {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: #0a1628;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.milestone-schematic-img {
  width: 100%;
  height: auto;
  display: block;
}

.milestone-formula-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--gold-primary);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.formula-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.milestone-formula-card code {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--gold-primary);
  word-break: break-all;
}

.milestone-desc-box h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.milestone-desc-box p {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-main);
}

.milestone-memory-box {
  background: rgba(232, 163, 23, 0.08);
  border: 1px solid rgba(232, 163, 23, 0.22);
  border-radius: var(--radius-sm);
  padding: 14px;
  position: relative;
}

.milestone-memory-box .memory-header {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold-primary);
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.milestone-memory-box p {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-main);
  font-style: italic;
}