/* ==========================================================================
   SAGA Project Page: Editorial Academic Design System
   Authors: Thanh-Nhan Vo, Trong-Thuan Nguyen, Trung-Hoang Le, Tam V. Nguyen, Minh-Triet Tran
   Conference: ACCV 2026
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Typography */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Warm paper surfaces */
  --bg-page: #f6f5f1;
  --bg-surface: #fffefa;
  --bg-surface-elevated: #fffefa;
  --bg-surface-muted: #efeee9;
  --bg-surface-subtle: #f8f7f3;
  --bg-dark-theater: #202b30;
  --bg-card-dark: #2c393d;

  /* Text & Hierarchy */
  --text-main: #233139;
  --text-secondary: #405159;
  --text-muted: #596a70;
  --text-inverse: #f8f7f3;

  /* Deep blue for links and selected controls */
  --primary: #275b70;
  --primary-hover: #1c4657;
  --primary-light: #eaf1f1;
  --primary-border: #b7cbcd;
  --primary-glow: rgba(39, 91, 112, 0.12);

  /* Muted teal distinguishes the method from its baseline */
  --saga-accent: #2f7481;
  --saga-accent-hover: #245b66;
  --saga-light: #edf4f2;
  --saga-border: #c5dcd6;
  --saga-glow: rgba(47, 116, 129, 0.14);

  /* Contrast / Baseline Red */
  --baseline-red: #a34e42;
  --baseline-light: #f8eeea;
  --baseline-border: #dfc3bb;

  /* Success Green */
  --success: #3e7160;
  --success-light: #eef4ed;
  --success-border: #cadccc;

  /* ACCV Badge Amber */
  --badge-bg: #eee4cf;
  --badge-text: #775731;
  --badge-border: #e0d1b2;

  /* Borders & Shadows */
  --border-light: #dfdfd8;
  --border-subtle: #ebeae3;
  --border-hover: #bfc7c3;

  --shadow-xs: 0 1px 2px rgb(35 49 57 / 0.04);
  --shadow-sm: 0 4px 12px rgb(35 49 57 / 0.04);
  --shadow-md: 0 8px 24px rgb(35 49 57 / 0.07);
  --shadow-lg: 0 14px 34px rgb(35 49 57 / 0.09);
  --shadow-xl: 0 18px 42px rgb(35 49 57 / 0.12);
  --shadow-theater: 0 18px 42px rgb(35 49 57 / 0.15);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Base & Typography
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-main);
  scroll-behavior: smooth;
  scroll-padding-top: 75px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.65;
  font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  margin-top: 0;
}

p {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(246, 245, 241, 0.96);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-nav.scrolled {
  background: var(--bg-page);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.nav-brand svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.nav-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  border-radius: var(--radius-full);
  margin-left: 0.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-nav-github {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--text-main);
  color: var(--text-inverse) !important;
  transition: background var(--transition-fast);
}

.btn-nav-github:hover {
  background: var(--primary-hover);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: clamp(2.25rem, 4.5vw, 3.5rem) 1.5rem 1.25rem;
  text-align: center;
  background: var(--bg-page);
}

.hero-container {
  max-width: 1040px;
  margin: 0 auto;
}

.conference-tag {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 1.25rem;
}

.conference-year {
  color: var(--primary-hover);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.conference-detail {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.005em;
}

.conference-detail span {
  padding: 0 0.4rem;
  color: var(--primary);
}

.paper-title {
  font-size: clamp(2.15rem, 4.5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 1.25rem;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.paper-title .gradient-text {
  background: linear-gradient(135deg, #0284c7 0%, #1d4ed8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.author-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem 1.5rem;
  margin-bottom: 0.85rem;
  font-size: 1.1rem;
}

.author-item {
  color: var(--text-main);
  font-weight: 500;
}

.author-item a {
  color: inherit;
}

.author-item a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.author-item sup {
  color: var(--text-muted);
  font-weight: 600;
  margin-left: 2px;
}

.affiliation-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.75rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.affiliation-item sup {
  color: var(--text-muted);
  font-weight: 600;
}

.author-mail-icon {
  display: inline-flex;
  align-items: center;
  margin-left: 0.35rem;
  font-size: 0.82rem;
  color: var(--primary);
  opacity: 0.85;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.author-mail-icon:hover {
  opacity: 1;
  color: var(--primary-hover);
  transform: translateY(-1px);
}

.author-emails-row {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  margin-top: -0.25rem;
  margin-bottom: 1.15rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.author-emails-row code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--bg-surface-muted);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.institution-branding {
  display: grid;
  grid-template-columns: 1fr 1fr 0.65fr;
  align-items: center;
  justify-items: center;
  gap: 1.5rem;
  width: min(100%, 740px);
  margin: 0 auto 1.25rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  box-shadow: none;
}

.institution-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 0;
}

.institution-logo {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

.logo-hcmus {
  max-height: 56px;
}

.logo-vnu {
  max-height: 66px;
}

.logo-dayton {
  max-height: 72px;
}

/* Action Buttons */
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-main);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.action-btn:hover {
  color: var(--primary);
  border-color: var(--primary-border);
  background: var(--primary-light);
}

.action-btn.primary {
  background: var(--text-main);
  border-color: var(--text-main);
  color: var(--text-inverse);
}

.action-btn.primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--text-inverse);
}

.action-btn i {
  font-size: 1rem;
}

/* ==========================================================================
   Teaser & Synchronized Comparison Theater
   ========================================================================== */
.theater-section {
  padding: 0.75rem 1.5rem 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.theater-card {
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  padding: clamp(1rem, 2.5vw, 2rem);
  border: 1px solid var(--border-light);
  color: var(--text-main);
}

.theater-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.theater-title-group h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theater-title-group h2 i {
  color: var(--primary);
}

.theater-title-group p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0.25rem 0 0 0;
}

.theater-controls-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.speed-selector {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface-muted);
  padding: 3px 6px;
  border-radius: var(--radius-md);
}

.speed-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  padding-left: 0.4rem;
}

.speed-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.speed-btn.active {
  background: var(--bg-surface);
  color: var(--primary-hover);
  box-shadow: var(--shadow-xs);
}

/* Preset Carousel Tabs */
.preset-tabs-wrapper {
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  scrollbar-width: thin;
}

.preset-tabs {
  display: flex;
  gap: 0.5rem;
  min-width: max-content;
}

.preset-pill {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.preset-pill:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--border-hover);
  color: var(--text-main);
}

.preset-pill.active {
  background: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary-hover);
}

.preset-pill .badge-length {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-muted);
  color: var(--text-muted);
}

.preset-pill.active .badge-length {
  background: #d3e2e2;
  color: var(--primary-hover);
}

/* Video Stage Area */
.theater-viewport {
  width: 100%;
}

/* Synchronized comparison panels */
.side-by-side-container {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.side-video-panel {
  min-width: 0;
}

.video-panel-heading {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0 0.1rem 0.6rem;
  font-size: 0.9rem;
}

.video-panel-heading strong {
  font-weight: 700;
}

.video-panel-heading span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.baseline-heading strong {
  color: var(--baseline-red);
}

.saga-heading strong {
  color: var(--saga-accent-hover);
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #10191d;
  border-radius: var(--radius-md);
}

.video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Video Stage Bottom Controls */
.video-playback-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.btn-play-pause {
  background: var(--primary);
  border: 1px solid var(--primary);
  color: var(--text-inverse);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-play-pause:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--text-inverse);
}

.seek-track-wrapper {
  flex-grow: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.seek-slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  background: var(--border-light);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.seek-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-fast);
}

.seek-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.time-readout {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Prompt Box */
.active-prompt-box {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.prompt-icon {
  color: var(--primary);
  font-size: 1.1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.prompt-text-content {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
  text-align: justify;
  text-justify: inter-word;
}

.prompt-text-content strong {
  color: var(--text-main);
}

/* ==========================================================================
   Section Containers & Headers
   ========================================================================== */
.content-section {
  padding: clamp(2rem, 3.8vw, 3rem) 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: left;
  margin-bottom: 1.5rem;
}

.section-label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--saga-accent-hover);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.2vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  max-width: 720px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ==========================================================================
   Abstract & Highlights Cards
   ========================================================================== */
.abstract-section {
  padding-top: 0.25rem;
  padding-bottom: 1.25rem;
}

#methodology {
  padding-top: 1.25rem;
}

.abstract-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem clamp(1.25rem, 3vw, 2rem);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: box-shadow var(--transition-normal);
}

.abstract-card:hover {
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.abstract-card .section-header {
  margin-bottom: 0;
}

.abstract-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  text-align: left;
  cursor: pointer;
}

.abstract-toggle-action {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background: var(--primary-light);
  letter-spacing: 0;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.abstract-toggle:hover .abstract-toggle-action {
  background: rgba(199, 107, 75, 0.18);
  color: var(--primary-hover);
}

.abstract-toggle-action i {
  transition: transform var(--transition-fast);
  font-size: 0.75rem;
}

.abstract-toggle[aria-expanded="true"] .abstract-toggle-action i {
  transform: rotate(180deg);
}

.abstract-content {
  padding-top: 1.5rem;
  margin-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.abstract-text {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 76ch;
  margin-bottom: 1.5rem;
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
}

.highlight-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem 1.75rem;
  border-top: 1px solid var(--border-light);
  padding-top: 1.25rem;
  margin-top: 1.25rem;
}

.metric-card {
  padding: 0.5rem 0;
  text-align: left;
}

.metric-val {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.metric-card.accent .metric-val {
  color: var(--text-main);
}

.metric-card.success .metric-val {
  color: var(--text-main);
}

.metric-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.metric-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Methodology & Dual-Pillars
   ========================================================================== */
.key-insight-box {
  background: var(--saga-light);
  border: 1px solid var(--saga-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.insight-icon {
  font-size: 1.3rem;
  color: var(--saga-accent-hover);
  flex-shrink: 0;
}

.insight-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--saga-accent-hover);
  margin-bottom: 0.5rem;
}

.insight-content p {
  color: #36545b;
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  text-align: justify;
  text-justify: inter-word;
}

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 820px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.pillar-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.pillar-1 .pillar-badge {
  background: var(--primary-light);
  color: var(--primary-hover);
  border: 1px solid var(--primary-border);
}

.pillar-2 .pillar-badge {
  background: var(--saga-light);
  color: var(--saga-accent-hover);
  border: 1px solid var(--saga-border);
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.pillar-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
  text-align: justify;
  text-justify: inter-word;
}

.pillar-formula {
  background: var(--bg-surface-muted);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--text-main);
  border: 1px solid var(--border-light);
  overflow-x: auto;
}

/* Architecture Figures / Lightbox */
.architecture-showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.figure-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.figure-img-wrapper {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  cursor: zoom-in;
}

.figure-img-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-normal);
}

.figure-img-wrapper:hover img {
  transform: scale(1.01);
}

.zoom-hint {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  background: rgba(32, 43, 48, 0.88);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  pointer-events: none;
}

.figure-caption {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: justify;
  text-justify: inter-word;
}

.figure-caption strong {
  color: var(--text-main);
}

/* ==========================================================================
   Quantitative Results & VBench Table
   ========================================================================== */
.table-responsive-wrapper {
  overflow-x: auto;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  margin-bottom: 1.5rem;
}

.vbench-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.vbench-table th,
.vbench-table td {
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--border-light);
}

.vbench-table th {
  background: var(--bg-surface-subtle);
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.vbench-table tr:last-child td {
  border-bottom: none;
}

.vbench-table .group-row {
  background: var(--bg-surface-muted);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.vbench-table tr.saga-row {
  background: var(--saga-light);
}

.vbench-table tr.saga-row:hover {
  background: #e4efec;
}

.vbench-table td.num {
  text-align: center;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.vbench-table .best-val {
  font-weight: 700;
  color: var(--saga-accent-hover);
  background: #dbeae5;
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.4rem;
}

.vbench-table .second-val {
  text-decoration: underline;
  font-weight: 600;
}

.table-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  background: var(--bg-surface-subtle);
  border-top: 1px solid var(--border-light);
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  align-items: stretch;
}

.chart-card {
  margin: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.85rem);
  display: flex;
  flex-direction: column;
}

.chart-caption {
  margin-bottom: 1.25rem;
}

.chart-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.chart-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: 75ch;
  margin: 0;
  text-align: justify;
  text-justify: inter-word;
}

.chart-img-wrapper {
  position: relative;
  cursor: zoom-in;
  margin-top: auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  padding: 0.5rem;
  border: 1px solid var(--border-light);
}

.chart-img-wrapper img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-normal);
}

.chart-img-wrapper:hover img {
  transform: scale(1.015);
}

.chart-img-wrapper .zoom-hint {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  background: rgba(26, 26, 24, 0.75);
  color: #ffffff;
  font-size: 0.75rem;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.chart-img-wrapper:hover .zoom-hint {
  opacity: 1;
}

.pairwise-chart {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  gap: 1.5rem;
  margin-top: auto;
  height: 100%;
  padding: 0.5rem 0;
}

.pairwise-row {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.pairwise-row + .pairwise-row {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.pairwise-row h5 {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pairwise-row-content {
  min-width: 0;
}

.pairwise-bar {
  display: flex;
  width: 100%;
  height: 1.85rem;
  overflow: hidden;
  border-radius: var(--radius-sm);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.08);
}

.pairwise-segment {
  flex: var(--share) 1 0%;
  min-width: 0;
  transition: opacity var(--transition-fast);
}

.pairwise-segment + .pairwise-segment {
  border-left: 2px solid var(--bg-surface);
}

.pairwise-saga {
  background: var(--saga-accent);
}

.pairwise-tie {
  background: #8b9697;
}

.pairwise-baseline {
  background: var(--baseline-red);
}

.pairwise-values {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-top: 0.75rem;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--text-secondary);
}

.pairwise-values span {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  white-space: nowrap;
}

.pairwise-values strong {
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.pairwise-values small {
  color: var(--text-muted);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
}

.pairwise-key {
  display: inline-block;
  width: 0.6rem;
  height: 0.6rem;
  margin-right: 0.2rem;
  border-radius: 2px;
  flex: 0 0 auto;
}

/* RTX 5090 Efficiency Banner */
.efficiency-banner {
  background: #e9eeea;
  color: var(--text-main);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border: 1px solid #d2ddd6;
}

.efficiency-text h4 {
  color: var(--text-main);
  font-size: 1.3rem;
  margin-bottom: 0.4rem;
}

.efficiency-text p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
  max-width: 580px;
  text-align: justify;
  text-justify: inter-word;
}

.efficiency-stats {
  display: flex;
  gap: 2rem;
}

.stat-item {
  text-align: right;
}

.stat-num {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--saga-accent-hover);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-lbl {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* ==========================================================================
   Qualitative Showcase Gallery
   ========================================================================== */
.gallery-filter-tabs {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.gallery-tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-tab-btn:hover {
  color: var(--primary);
  border-color: var(--primary-border);
}

.gallery-tab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.gallery-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--border-hover);
}

.gallery-video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}

.gallery-video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.gallery-card-info {
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.gallery-card-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--saga-accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.gallery-card-prompt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  flex-grow: 1;
  text-align: justify;
  text-justify: inter-word;
}

/* Qualitative Paper Grid */
.paper-grid-feature {
  margin-top: 1.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
}

.paper-grid-feature h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.paper-grid-feature p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  text-align: justify;
  text-justify: inter-word;
}

/* ==========================================================================
   BibTeX & Citation Section
   ========================================================================== */
.bibtex-wrapper {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-xs);
}

.bibtex-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--bg-surface-muted);
  border-bottom: 1px solid var(--border-light);
}

.bibtex-header span {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  font-weight: 600;
}

.btn-copy-bibtex {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-copy-bibtex:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.bibtex-code {
  margin: 0;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-main);
  background: var(--bg-surface);
  overflow-x: auto;
  white-space: pre;
}

/* Toast Notification */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-dark-theater);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  z-index: 9999;
}

.toast-msg.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Image Lightbox Modal
   ========================================================================== */
.lightbox-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(10, 15, 29, 0.95);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-modal.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 95vw;
  max-height: 90vh;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
}

.lightbox-close {
  position: absolute;
  top: -45px;
  right: 0;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: background var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-surface-muted);
  border-top: 1px solid var(--border-light);
  padding: 2.25rem 1.5rem 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.bibtex-section {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

.efficiency-text h4 i {
  color: var(--saga-accent-hover);
  margin-right: 0.5rem;
}

.toast-msg i {
  color: #a9d3b6;
}

.action-btn,
.gallery-tab-btn,
.preset-pill,
.btn-copy-bibtex {
  min-height: 44px;
}

.speed-btn {
  min-height: 36px;
}

:where(a, button, input, [data-zoomable]):focus-visible {
  outline: 3px solid #a47048;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--primary);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 768px) {
  html {
    scroll-padding-top: 125px;
  }

  .nav-container {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    gap: 1.25rem;
    white-space: nowrap;
    padding-bottom: 0.25rem;
  }

  .theater-card {
    padding: 1rem;
    border-radius: var(--radius-lg);
  }

  .paper-title {
    font-size: clamp(2rem, 7vw, 2.6rem);
  }

  .content-section {
    padding: 2rem 1.25rem;
  }

  .theater-title-group h2 {
    font-size: 1.2rem;
  }

  .theater-controls-top {
    width: 100%;
  }

  .seek-track-wrapper {
    min-width: 0;
  }

  .time-readout {
    font-size: 0.7rem;
  }

  .efficiency-stats {
    width: 100%;
    justify-content: space-around;
  }

  .stat-item {
    text-align: center;
  }

  .charts-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .nav-actions { margin-left: auto; }
  .nav-badge { display: none; }
  .author-list { font-size: 0.98rem; }
  .affiliation-list { font-size: 0.85rem; }
  .institution-branding { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem 0.75rem; padding: 1.25rem 0.75rem; }
  .institution-item:last-child { grid-column: 1 / -1; }
  .logo-dayton { max-height: 88px; }
  .hero-buttons { gap: 0.5rem; }
  .action-btn { padding: 0.6rem 0.85rem; font-size: 0.84rem; }
  .theater-section { padding-left: 0.75rem; padding-right: 0.75rem; }
  .side-by-side-container { gap: 0.5rem; }
  .video-panel-heading { gap: 0.3rem; font-size: 0.75rem; }
  .video-panel-heading span { font-size: 0.7rem; }
  .gallery-grid, .charts-grid { grid-template-columns: minmax(0, 1fr); }
  .key-insight-box { padding: 1.25rem; gap: 0.75rem; }
}