/* ==========================================================================
   DRACULA THEME — Soccer CFD / The Physics of Play
   ========================================================================== */

/* --- 1. Theme Variables --- */
:root {
  --background: #282a36;
  --current-line: #44475a;
  --foreground: #f8f8f2;
  --comment: #6272a4;
  --cyan: #8be9fd;
  --green: #50fa7b;
  --orange: #ffb86c;
  --pink: #ff79c6;
  --purple: #bd93f9;
  --red: #ff5555;
  --selection: rgba(189, 147, 249, 0.25);

  /* Module accent colors */
  --mod-cfd: var(--cyan);
  --mod-continuum: var(--purple);
  --mod-porous: var(--orange);
  --mod-validation: var(--green);
  --mod-magnus: var(--pink);
  --mod-knuckle: var(--orange);
}

/* --- 1a. Pitch Diagram --- */
.pitch-diagram-wrap {
  margin: 1.5rem auto;
  max-width: 600px;
}
.pitch-diagram-wrap figcaption {
  font-size: 0.78rem;
  color: var(--comment);
  margin-top: 8px;
  text-align: center;
}
.pitch-diagram {
  width: 100%;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--current-line);
  background: rgba(33, 34, 44, 0.5);
  padding: 4px;
  overflow: visible;
}
/* pitch outline strokes — solid bright */
.pitch-diagram .pitch-border { fill: none; stroke: var(--comment); stroke-width: 1; }
.pitch-diagram .pitch-bg {
  fill: url(#pitch-grad);
  stroke: none;
}
.pitch-diagram .pitch-spot {
  fill: var(--comment);
  stroke: none;
  r: 3;
  animation: pitchSpotPulse 3s ease-in-out infinite;
}
@keyframes pitchSpotPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.pitch-diagram .pitch-goal { fill: none; stroke: var(--foreground); stroke-width: 2.5; }
/* lane separator lines — dashed vibrant */
.pitch-diagram .lane-sep {
  fill: none;
  stroke: var(--purple);
  stroke-width: 1.5;
  stroke-dasharray: 6 4;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}
.pitch-diagram-wrap:hover .lane-sep { opacity: 1; }
/* lane band fills */
.pitch-diagram .lane {
  stroke: none;
  opacity: 0;
  transition: opacity 0.8s ease;
  cursor: pointer;
}
.pitch-diagram .lane.visible { opacity: 0.15 !important; }
.pitch-diagram .lane.visible.lane-hovered { opacity: 0.35 !important; }
.pitch-diagram .lane.visible:hover { opacity: 0.25 !important; }
/* cross-highlight rows */
tr.hl { background: rgba(255,255,255,0.04) !important; }
tr.hl td { color: var(--foreground) !important; }
.pitch-diagram .lw { fill: var(--cyan); }
.pitch-diagram .lhs { fill: var(--green); }
.pitch-diagram .cen { fill: var(--purple); }
.pitch-diagram .rhs { fill: var(--green); }
.pitch-diagram .rw { fill: var(--cyan); }
/* lane labels */
.pitch-diagram .lane-label {
  fill: var(--comment);
  font-size: 14px;
  font-family: 'Meslo LG L', 'JetBrains Mono', 'Consolas', monospace;
  opacity: 0;
  transition: opacity 0.6s ease 0.4s;
}
.pitch-diagram .lane-label.visible { opacity: 1; }
.pitch-diagram .cen-lbl { fill: var(--purple); }
.pitch-diagram .lw-lbl,
.pitch-diagram .rw-lbl { fill: var(--cyan); }
.pitch-diagram .lhs-lbl,
.pitch-diagram .rhs-lbl { fill: var(--green); }


/* --- 2. Base Elements --- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Keep monospace for headings, nav, code, TOC */
.site-nav, .nav-entries,
.main-content h1, .main-content h2, .main-content h3, .main-content h4, .main-content h5,
.main-content pre, .main-content code, .main-content :not(pre) > code,
.toc-sidebar {
  font-family: 'Meslo LG L', 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--pink);
}

h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

ul, ol { padding-left: 1.5em; }
li { margin-bottom: 4px; }

hr {
  border: 0;
  border-top: 1px solid var(--current-line);
  margin: 2.5rem 0;
}

/* --- 2a. Background Layers --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse at 50% 15%, rgba(80, 250, 123, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 85%, rgba(80, 250, 123, 0.02) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 50%, rgba(189, 147, 249, 0.03) 0%, transparent 50%),
    var(--background);
}

.bg-pitch {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
}
.bg-pitch svg {
  width: 100%;
  height: 100%;
  display: block;
}
.bg-pitch .pitch-outline { fill: none; stroke: var(--green); stroke-width: 0.3; }
.bg-pitch .pitch-line { fill: none; stroke: var(--green); stroke-width: 0.2; stroke-dasharray: 0.3 0.2; }
.bg-pitch .pitch-circle { fill: none; stroke: var(--green); stroke-width: 0.2; stroke-dasharray: 0.3 0.2; }
.bg-pitch .pitch-spot { fill: var(--green); }

.bg-motif {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: visible;
}
.bg-motif .hex {
  position: absolute;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  animation: hexPulse 6s ease-in-out infinite alternate;
}
@keyframes hexPulse {
  0% { opacity: 0.02; transform: scale(0.85); }
  100% { opacity: 0.1; transform: scale(1); }
}

/* --- 3. Navigation (Bracketed Code Style) --- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #21222c;
  border-bottom: 1px solid var(--current-line);
}
.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  height: 52px;
}
.nav-brand {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--foreground);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.nav-brand .highlight { color: var(--pink); }
.nav-brand:hover { opacity: 0.85; color: var(--foreground); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--current-line);
  color: var(--comment);
  font-size: 1.2rem;
  cursor: pointer;
  margin-left: auto;
  padding: 2px 10px;
  border-radius: 4px;
  font-family: inherit;
}
.nav-toggle:hover {
  color: var(--foreground);
  border-color: var(--comment);
}

.nav-entries {
  display: flex;
  gap: 2px;
  margin-left: auto;
}
.nav-entries a {
  color: var(--comment);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 4px;
  transition: all 0.15s;
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.nav-entries a:hover {
  color: var(--foreground);
  background: rgba(255,255,255,0.05);
}
.nav-entries a.active {
  color: var(--cyan);
  background: rgba(139, 233, 253, 0.1);
}

/* Nav link color coding by page */
.nav-entries a:nth-child(1).active { color: var(--purple); background: rgba(189,147,249,0.1); }
.nav-entries a:nth-child(2).active { color: var(--cyan); background: rgba(139,233,253,0.1); }
.nav-entries a:nth-child(3).active { color: var(--green); background: rgba(80,250,123,0.1); }
.nav-entries a:nth-child(4).active { color: var(--orange); background: rgba(255,184,108,0.1); }
.nav-entries a:nth-child(5).active { color: var(--pink); background: rgba(255,121,198,0.1); }
.nav-entries a:nth-child(6).active { color: var(--purple); background: rgba(189,147,249,0.1); }
.nav-entries a:nth-child(7).active { color: var(--comment); background: rgba(98,114,164,0.1); }

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-entries {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #21222c;
    border-bottom: 1px solid var(--current-line);
    padding: 8px;
    gap: 2px;
  }
  .nav-inner.open .nav-entries { display: flex; }
  .nav-entries a { padding: 8px 12px; font-size: 0.8rem; }
}

/* --- 4. Breadcrumb --- */
.breadcrumb {
  font-size: 0.7rem;
  color: var(--comment);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--current-line);
  font-family: inherit;
  letter-spacing: 0.02em;
}

/* --- 5. Section Headers (# Comment Style) --- */
.section-header {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--purple);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--current-line);
  letter-spacing: -0.02em;
}
.section-header.cyan { color: var(--cyan); }
.section-header.green { color: var(--green); }
.section-header.orange { color: var(--orange); }
.section-header.pink { color: var(--pink); }

.main-content h1 {
  color: var(--pink);
  font-weight: 700;
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}
.main-content h2 {
  color: var(--purple);
  font-size: 1.3rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--current-line);
}
.main-content h3 {
  color: var(--cyan);
  font-size: 1.05rem;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
}
.main-content h4 {
  color: var(--pink);
  font-size: 0.9rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.main-content h5 {
  color: var(--orange);
  font-size: 0.85rem;
  margin-top: 1.25rem;
  margin-bottom: 0.4rem;
}

.main-content a { color: var(--cyan); }
.main-content a:hover { color: var(--pink); }
.main-content p { margin: 0.75rem 0; }
.main-content img { max-width: 100%; border-radius: 6px; }
.main-content strong { color: var(--foreground); }

/* --- 6. Main Content Layout --- */
.main-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 20px 4rem;
}

/* --- 6a. TOC Sidebar --- */
.main-content.with-toc {
  margin-left: 260px;
  max-width: 1060px;
}
.toc-sidebar {
  position: fixed;
  left: 20px;
  top: 68px;
  width: 220px;
  max-height: calc(100vh - 84px);
  overflow-y: auto;
  font-size: 0.75rem;
  background: #21222c;
  border-left: 3px solid var(--purple);
  border-radius: 0 6px 6px 0;
  padding: 14px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--current-line) transparent;
}
.toc-sidebar::-webkit-scrollbar { width: 4px; }
.toc-sidebar::-webkit-scrollbar-thumb { background: var(--current-line); border-radius: 2px; }
.toc-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-sidebar li {
  margin: 0;
}
.toc-sidebar .toc-title {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--comment);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--current-line);
}
.toc-sidebar a {
  display: block;
  color: var(--comment);
  text-decoration: none;
  padding: 3px 0 3px 8px;
  border-left: 2px solid transparent;
  transition: all 0.15s;
  line-height: 1.5;
}
.toc-sidebar a:hover {
  color: var(--foreground);
  border-left-color: var(--comment);
}
.toc-sidebar a.active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(139, 233, 253, 0.06);
}
.toc-sidebar a.toc-h3 { padding-left: 24px; font-size: 0.7rem; }
.toc-sidebar a.toc-h4 { padding-left: 40px; font-size: 0.65rem; }

/* --- 7. Footer --- */
.site-footer {
  text-align: center;
  padding: 1.5rem 20px;
  border-top: 1px solid var(--current-line);
  font-size: 0.7rem;
  color: var(--comment);
}
.site-footer a { color: var(--comment); }
.site-footer a:hover { color: var(--pink); }

/* --- 8. Hero --- */
.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--foreground);
  margin: 0;
}
.hero h1 .highlight { color: var(--pink); }
.hero p {
  max-width: 640px;
  margin: 0.75rem auto 0;
  font-size: 0.85rem;
  color: var(--comment);
  line-height: 1.7;
}

/* --- 9. Terminal Boot Sequence --- */
#boot {
  display: none;
  text-align: left;
  background: #1a1b26;
  border: 1px solid var(--current-line);
  border-radius: 6px;
  padding: 20px 24px;
  margin: 0 auto 30px;
  max-width: 640px;
  font-size: 0.75rem;
  line-height: 1.8;
  color: var(--foreground);
  position: relative;
  overflow: hidden;
}
#boot .boot-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--current-line);
}
#boot .boot-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
#boot .boot-dot.red { background: var(--red); }
#boot .boot-dot.yellow { background: var(--orange); }
#boot .boot-dot.green { background: var(--green); }
#boot .boot-line {
  opacity: 0;
  animation: bootFadeIn 0.5s ease forwards;
}
#boot .boot-prompt { color: var(--green); }
#boot .boot-info { color: var(--comment); }
#boot .boot-ok { color: var(--green); }
#boot .boot-warn { color: var(--orange); }
#boot .boot-highlight { color: var(--cyan); }
#boot .boot-cursor::after {
  content: '\u258C';
  color: var(--cyan);
  animation: bootBlink 0.8s step-end infinite;
}
@keyframes bootFadeIn {
  to { opacity: 1; }
}
@keyframes bootBlink {
  50% { opacity: 0; }
}

/* --- 10. Cards (Code-Editor Style) --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 1.5rem 0;
}
.card-grid .card {
  background: #21222c;
  border-left: 3px solid var(--purple);
  border-radius: 0 6px 6px 0;
  padding: 18px 20px;
  transition: all 0.2s;
  cursor: default;
}
.card-grid .card:hover {
  border-left-color: var(--pink);
  transform: translateX(3px);
  background: #282a36;
}
.card-grid .card h4 {
  color: var(--foreground);
  font-size: 0.9rem;
  margin: 0 0 6px;
  text-transform: none;
  letter-spacing: 0;
}
.card-grid .card p {
  font-size: 0.78rem;
  color: var(--comment);
  margin: 4px 0;
}
.card-grid .card .tag {
  display: inline-block;
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
  border: 1px solid;
}
.card-grid .card .arrow {
  color: var(--purple);
  font-size: 0.78rem;
  margin-top: 8px;
  display: inline-block;
  transition: color 0.2s;
}
.card-grid .card:hover .arrow { color: var(--pink); }

/* Card color variants by module */
.card-grid .card.mod-cfd { border-left-color: var(--cyan); }
.card-grid .card.mod-cfd .tag { border-color: var(--cyan); color: var(--cyan); }
.card-grid .card.mod-cont { border-left-color: var(--purple); }
.card-grid .card.mod-cont .tag { border-color: var(--purple); color: var(--purple); }
.card-grid .card.mod-porous { border-left-color: var(--orange); }
.card-grid .card.mod-porous .tag { border-color: var(--orange); color: var(--orange); }
.card-grid .card.mod-validation { border-left-color: var(--green); }
.card-grid .card.mod-validation .tag { border-color: var(--green); color: var(--green); }
.card-grid .card.mod-theory { border-left-color: var(--purple); }
.card-grid .card.mod-theory .tag { border-color: var(--purple); color: var(--purple); }
.card-grid .card.mod-shot { border-left-color: var(--pink); }
.card-grid .card.mod-shot .tag { border-color: var(--pink); color: var(--pink); }
.card-grid .card.mod-overlap { border-left-color: var(--green); }
.card-grid .card.mod-overlap .tag { border-color: var(--green); color: var(--green); }
.card-grid .card.mod-tactical { border-left-color: var(--orange); }
.card-grid .card.mod-tactical .tag { border-color: var(--orange); color: var(--orange); }

/* Table of Contents grid: 2 columns on desktop */
.card-grid.toc-grid {
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 640px) {
  .card-grid.toc-grid { grid-template-columns: 1fr; }
}

/* --- 11. Stats Cards --- */
.stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}
.stat {
  background: #21222c;
  border: 1px solid var(--current-line);
  border-radius: 6px;
  padding: 14px 18px;
  flex: 1;
  min-width: 100px;
  text-align: center;
  transition: all 0.2s;
}
.stat:hover {
  border-color: var(--comment);
  transform: translateY(-2px);
}
.stat .num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cyan);
  display: block;
}
.stat .lbl {
  font-size: 0.7rem;
  color: var(--comment);
  margin-top: 4px;
}

/* --- 12. Callout Boxes --- */
.callout-box {
  background: #21222c;
  border-left: 3px solid var(--purple);
  border-radius: 0 6px 6px 0;
  padding: 14px 18px;
  margin: 1.25rem 0;
  font-size: 0.82rem;
}
.callout-box strong { color: var(--foreground); }
.callout-box.theory { border-left-color: var(--cyan); }
.callout-box.result { border-left-color: var(--green); }
.callout-box.warn { border-left-color: var(--orange); }
.callout-box.detail { border-left-color: var(--comment); }

/* --- 13. Equation Boxes --- */
.eq-box {
  background: #1a1b26;
  border: 1px solid var(--current-line);
  border-left: 3px solid var(--purple);
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 1.25rem 0;
  overflow-x: auto;
}
.eq-box .eq-label {
  text-align: right;
  font-size: 0.7rem;
  color: var(--comment);
  margin-top: 8px;
}

/* --- 14. Tables --- */
.main-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.main-content th, .main-content td {
  padding: 8px 12px;
  border: 1px solid var(--current-line);
  text-align: left;
}
.main-content th {
  background: #21222c;
  color: var(--purple);
  font-weight: 600;
}
.main-content td { color: var(--foreground); }
.main-content tr:hover td { background: rgba(255,255,255,0.02); }

/* --- 15. Video Grids --- */
.vid-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 1.5rem 0;
}
.vid-grid.single { grid-template-columns: 1fr; }
.vid-grid figure:only-child { grid-column: 1 / -1; }
.vid-grid video {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--current-line);
  display: block;
}
.vid-grid .cap {
  font-size: 0.78rem;
  color: var(--comment);
  margin-top: 6px;
  text-align: center;
}

/* --- 16. Image Rows --- */
.img-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 1.5rem 0;
}
.img-row.single { grid-template-columns: 1fr; }
.img-row.triple { grid-template-columns: 1fr 1fr 1fr; }
.img-row figure { margin: 0; }
.img-row figcaption {
  font-size: 0.78rem;
  color: var(--comment);
  margin-top: 6px;
  text-align: center;
}

/* --- 17. Panel Rows (CFD gallery side-by-side) --- */
.panel-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 1.5rem 0;
}
.panel-row .panel {
  background: #21222c;
  border: 1px solid var(--current-line);
  border-radius: 6px;
  padding: 14px;
}
.panel-row .panel h4 {
  margin: 0 0 10px;
  text-align: center;
  color: var(--purple);
  font-size: 0.9rem;
}
.panel-row figure {
  margin: 0;
}
.panel-row figcaption {
  font-size: 0.7rem;
  color: var(--comment);
  margin-top: 4px;
  text-align: center;
}
@media (max-width: 720px) {
  .panel-row { grid-template-columns: 1fr; }
}

/* --- 18. Video Rows --- */
.video-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 1.5rem 0;
}
.video-row.single { grid-template-columns: 1fr; }
.video-row.triple { grid-template-columns: 1fr 1fr 1fr; }
.video-row figure { margin: 0; }
.video-row figure:only-child { grid-column: 1 / -1; }
.video-row video {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--current-line);
  display: block;
}
.video-row figcaption {
  font-size: 0.78rem;
  color: var(--comment);
  margin-top: 6px;
  text-align: center;
}

/* --- 18. Iframe Rows --- */
.iframe-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 1.5rem 0;
}
.iframe-row figure { margin: 0; }
.iframe-row iframe {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--current-line);
  background: #1a1b26;
}
.iframe-row figcaption {
  font-size: 0.78rem;
  color: var(--comment);
  margin-top: 6px;
  text-align: center;
}

/* --- 19. Nav Links (internal) --- */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 1.25rem 0;
}
.nav-links a {
  background: #21222c;
  border: 1px solid var(--current-line);
  border-radius: 4px;
  padding: 6px 14px;
  font-size: 0.78rem;
  color: var(--comment);
  transition: all 0.2s;
}
.nav-links a:hover {
  border-color: var(--purple);
  color: var(--foreground);
  background: #282a36;
}

/* --- 20. Code Blocks (Prism overrides for Dracula) --- */
.main-content pre {
  border-radius: 6px;
  border: 1px solid var(--current-line);
  background: #1a1b26 !important;
  font-size: 0.75rem;
}
.main-content code {
  font-size: 0.78rem;
  font-family: 'Meslo LG L', 'JetBrains Mono', monospace;
}
.main-content :not(pre) > code {
  background: #21222c;
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--pink);
  font-size: 0.8rem;
  border: 1px solid var(--current-line);
}

/* Prism copy-to-clipboard button */
.copy-to-clipboard-button {
  font-family: 'Meslo LG L', monospace !important;
  font-size: 0.65rem !important;
  color: var(--comment) !important;
  background: #21222c !important;
  border: 1px solid var(--current-line) !important;
  border-radius: 3px !important;
  padding: 2px 8px !important;
  cursor: pointer !important;
  transition: all 0.2s !important;
}
.copy-to-clipboard-button:hover {
  color: var(--cyan) !important;
  border-color: var(--cyan) !important;
}

/* --- 21. Interactive Comparison Slider --- */
.compare-container {
  position: relative;
  width: 100%;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--current-line);
  margin: 1.5rem 0;
  user-select: none;
  cursor: ew-resize;
}
.compare-container video,
.compare-container img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}
.compare-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.compare-overlay video,
.compare-overlay img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--pink);
  cursor: ew-resize;
  z-index: 10;
}
.compare-handle::before {
  content: '\2B61';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--pink);
  color: var(--background);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: bold;
  box-shadow: 0 0 10px rgba(255,121,198,0.4);
}
.compare-labels {
  position: absolute;
  bottom: 12px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 5;
  pointer-events: none;
}
.compare-labels span {
  font-size: 0.65rem;
  color: var(--foreground);
  background: rgba(40,42,54,0.8);
  padding: 3px 10px;
  border-radius: 3px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.1);
}
.compare-labels .left-label { color: var(--cyan); }
.compare-labels .right-label { color: var(--orange); }

/* --- 22. Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 23. Responsive --- */
@media (max-width: 900px) {
  .main-content.with-toc {
    margin-left: 0;
    max-width: 1000px;
  }
  .toc-sidebar { display: none; }
}
@media (max-width: 720px) {
  .main-content { padding: 1.5rem 16px 3rem; }
  .vid-grid { grid-template-columns: 1fr; }
  .img-row { grid-template-columns: 1fr; }
  .img-row.triple { grid-template-columns: 1fr; }
  .video-row { grid-template-columns: 1fr; }
  .video-row.triple { grid-template-columns: 1fr; }
  .iframe-row { grid-template-columns: 1fr; }
  .stats { gap: 8px; }
  .stat { min-width: 80px; padding: 10px 14px; }
  .stat .num { font-size: 1.1rem; }
  .compare-labels span { font-size: 0.55rem; padding: 2px 6px; }
}

/* --- 24. Print Styles --- */
@media print {
  .site-nav, .site-footer, #boot, .compare-container { display: none; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .main-content { max-width: 100%; }
  a { color: #000; text-decoration: underline; }
  pre { border: 1px solid #ccc; }
}