/* Brand: blue #08415C, grey #808080, red #C00000 */
:root[data-theme="light"] {
  color-scheme: light;
  --brand-blue: #08415c;
  --brand-red: #c00000;
  --brand-grey: #808080;
  --bg: #ffffff;
  --bg-elev: #f5f6f7;
  --ink: #1a1a1a;
  --muted: #808080;
  --line: #d4d4d4;
  --line-strong: #a0a0a0;
  --accent: #08415c;
  --accent-hover: #c00000;
  --accent-dim: #c00000;
  --panel: #f0f2f4;
  --chip-bg: #e8eaeb;
  --h3-color: #08415c;
  --h2-color: #08415c;
  --fig-cap: #808080;
  --label-muted: #808080;
  --media-bg: linear-gradient(145deg, #f5f7f8, #eceef0);
  --results-wrap-bg: #fafafa;
  --chip-active-bg: #08415c;
  --chip-active-border: #08415c;
  --chip-active-fg: #ffffff;
  --video-border: #c4c4c4;
  --video-head-bg: #ececec;
  --video-head-border: #c4c4c4;
  --video-head-text: #404040;
  --pre-bg: #f5f5f5;
  --pre-text: #1a1a1a;
  --pre-border: #d4d4d4;
  --subtle: #808080;
  --hint: #808080;
  --h1-color: #08415c;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --brand-blue: #08415c;
  --brand-red: #c00000;
  --brand-grey: #808080;
  --bg: #0a1218;
  --bg-elev: #111c24;
  --ink: #e8e8e8;
  --muted: #a0a0a0;
  --line: #2a3d4a;
  --line-strong: #3d5566;
  --accent: #7ec8e0;
  --accent-hover: #ff6b6b;
  --accent-dim: #c00000;
  --panel: #0f1a22;
  --chip-bg: #162530;
  --h3-color: #b8dce8;
  --h2-color: #7ec8e0;
  --fig-cap: #a0a0a0;
  --label-muted: #a0a0a0;
  --media-bg: linear-gradient(145deg, #0f1c24, #0a1218);
  --results-wrap-bg: #0d161d;
  --chip-active-bg: #08415c;
  --chip-active-border: #c00000;
  --chip-active-fg: #ffffff;
  --video-border: #2a4050;
  --video-head-bg: #111c24;
  --video-head-border: #2a4050;
  --video-head-text: #c8c8c8;
  --pre-bg: #0f1a22;
  --pre-text: #e0e0e0;
  --pre-border: #2a4050;
  --subtle: #a0a0a0;
  --hint: #a0a0a0;
  --h1-color: #e8f4f8;
}

.theme-bar {
  position: fixed;
  top: 0.85rem;
  right: 1rem;
  z-index: 100;
}

.theme-toggle {
  font-size: 0.86rem;
  padding: 0.4rem 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

:root[data-theme="dark"] .theme-toggle {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.section {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 2.2rem 0;
}

#results.section,
#videos.section {
  width: min(1280px, 95vw);
}

.hero {
  text-align: center;
  padding: 3.5rem 4.5rem 2rem 1rem;
}

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  max-width: 28ch;
  margin: 0 auto;
}

.hero h1 {
  max-width: min(44ch, 94vw);
  color: var(--h1-color);
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  text-align: center;
  margin: 0 0 1rem;
  color: var(--h2-color);
}

h3 {
  font-size: 1.12rem;
  margin: 1.5rem 0 0.65rem;
  color: var(--h3-color);
}

.authors {
  margin: 1rem auto 0;
  max-width: 90ch;
  font-size: 1.02rem;
}

.hero .authors {
  margin-top: 1.15rem;
}

.affiliations {
  margin-top: 0.45rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.actions {
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 0.5rem 0.95rem;
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--bg-elev);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--brand-blue);
  text-decoration: none;
}

.btn-solid {
  background: var(--brand-red);
  border-color: var(--brand-red);
  color: #fff;
}

.btn-solid:hover {
  background: #a00000;
  border-color: #a00000;
  color: #fff;
}

.btn-soon {
  cursor: default;
  opacity: 0.72;
  pointer-events: none;
  color: var(--muted);
}

:root[data-theme="dark"] .btn-soon {
  opacity: 0.65;
}

.lead,
.abstract {
  max-width: 92ch;
  margin: 1rem auto 0;
  color: var(--muted);
  text-align: left;
}

.abstract {
  font-size: 0.98rem;
}

#abstract > .abstract:first-of-type {
  margin-bottom: 1.35rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 1.5rem;
  align-items: start;
  margin-top: 0.75rem;
}

.figure {
  margin: 0.75rem 0 0;
}

.figure.figure--teaser {
  width: 80%;
  max-width: 80%;
  margin: 0 auto 1.35rem;
}

@media (max-width: 640px) {
  .figure.figure--teaser {
    width: 92%;
    max-width: 92%;
  }
}

.intro-text {
  max-width: 72ch;
  margin: 0 auto;
}

.media {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--media-bg);
}

.media img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

#overview .media img {
  max-height: min(78vh, 820px);
  object-fit: contain;
}

.fig-caption {
  margin-top: 0.5rem;
  font-size: 0.88rem;
  color: var(--fig-cap);
  text-align: center;
}

.bullets {
  margin: 0.6rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.bullets li {
  margin: 0.35rem 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 0.85rem;
}

.card h3 {
  margin-top: 0;
  font-size: 1.02rem;
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* Results interactive */
.results-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 0.75rem;
}

.results-figure-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--results-wrap-bg);
}

.results-figure-wrap img {
  width: 80%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.task-toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.task-group-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--label-muted);
  margin-bottom: 0.35rem;
}

.task-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.task-chip {
  border: 1px solid var(--line-strong);
  background: var(--chip-bg);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.task-chip:hover {
  border-color: var(--brand-blue);
  transform: translateY(-1px);
}

.task-chip.is-active {
  background: var(--chip-active-bg);
  border-color: var(--chip-active-border);
  color: var(--chip-active-fg);
}

.task-chip:disabled {
  pointer-events: none;
}

.task-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 1rem;
  min-height: 120px;
}

.task-panel h4 {
  margin: 0 0 0.65rem;
  font-size: 1rem;
  font-weight: 700;
}

.task-panel .task-desc {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.video-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.video-unit {
  flex: 1 1 220px;
  max-width: 320px;
  border: 1px solid var(--video-border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-elev);
}

.video-unit-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  background: var(--video-head-bg);
  border-bottom: 1px solid var(--video-head-border);
}

.video-unit-head img.emb-icon {
  width: 64px;
  height: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.video-unit-head span {
  font-size: 0.82rem;
  color: var(--video-head-text);
  line-height: 1.2;
}

.video-crop {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #000;
}

/* Tighter “center rectangle”: zoom into middle of frame (scale + clip). */
.video-crop video {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100%;
  height: 100%;
  /* ~15% less zoom than 1.58 → 1.58 × 0.85 */
  transform: translate(-50%, -50%) scale(1.343);
  transform-origin: center center;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.hint {
  font-size: 0.86rem;
  color: var(--hint);
  margin-top: 0.5rem;
}

pre {
  margin: 0 auto;
  max-width: 900px;
  border: 1px solid var(--pre-border);
  border-radius: 12px;
  background: var(--pre-bg);
  padding: 0.9rem;
  overflow-x: auto;
  color: var(--pre-text);
  line-height: 1.45;
  font-size: 0.85rem;
}

#copyBibtex {
  display: block;
  margin: 0.65rem auto 0;
  cursor: pointer;
}

.footer {
  border-top: 1px solid var(--line);
  text-align: center;
  padding: 1.5rem 1rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-logo {
  margin: 0 0 1rem;
}

.footer-logo a {
  display: inline-block;
  line-height: 0;
  opacity: 0.95;
  transition: opacity 0.15s ease;
}

.footer-logo a:hover {
  opacity: 1;
  color: inherit;
}

.footer-logo img {
  height: 44px;
  width: auto;
  max-width: min(240px, 70vw);
  object-fit: contain;
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 400ms ease, transform 400ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.subtle {
  color: var(--subtle);
  font-size: 0.9rem;
}

.sim-embed-wrap {
  width: 100%;
  margin-top: 0.5rem;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.sim-embed-frame {
  display: block;
  width: 100%;
  min-height: min(85vh, 880px);
  border: 0;
  background: #0d1520;
}

@media (max-width: 900px) {
  .sim-embed-frame {
    min-height: 70vh;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3.2rem;
    padding-right: 1rem;
  }
}

@media (max-width: 480px) {
  .theme-bar {
    right: 0.5rem;
    top: 0.55rem;
  }

  .theme-toggle {
    font-size: 0.8rem;
    padding: 0.35rem 0.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}