:root {
  --bg-dark: #0b1020;
  --bg-dark-2: #121936;
  --text-light: #eef3ff;
  --muted: #aeb8d4;
  --line: #2b3558;

  --accent: #7bc8ff;
  --accent-2: #bb9cff;

  --paper-bg: #f5f7fc;
  --card-bg: #ffffff;

  --shadow:
    0 20px 60px rgba(20, 30, 60, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper-bg);
  color: #172033;
  font-family: Lato, Arial, sans-serif;
  line-height: 1.65;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
}

.navbar {
  position: sticky;
  top: 0;

  z-index: 100;

  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 18px 6vw;

  background: rgba(255,255,255,0.9);

  backdrop-filter: blur(12px);

  border-bottom: 1px solid #e5eaf3;
}

.brand {
  font-weight: 800;
  color: #13203c;
}

.nav-right {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-right a {
  color: #34415f;
}

.nav-right a:hover {
  color: #1772d0;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;

  gap: 50px;

  align-items: center;

  padding:
    90px 6vw
    60px;

  background:
    radial-gradient(
      circle at 80% 10%,
      #213667 0%,
      var(--bg-dark) 45%,
      #070b16 100%
    );

  color: var(--text-light);
}

.conference-badge {
  display: inline-block;

  padding:
    8px 14px;

  border-radius: 999px;

  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent-2)
    );

  color: #07111f;

  font-weight: 800;
}

.hero h1 {
  margin:
    22px 0 18px;

  font-size:
    clamp(42px, 7vw, 82px);

  line-height: 0.95;

  letter-spacing: -0.05em;
}

.subtitle {
  max-width: 760px;

  color: #d5e2ff;

  font-size:
    clamp(18px, 2vw, 23px);
}

.authors {
  margin-top: 28px;
  color: #c7d2ec;
}

.hero-buttons {
  margin-top: 28px;

  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.primary-btn,
.secondary-btn {
  border-radius: 999px;

  padding:
    12px 18px;

  transition: 0.2s ease;
}

.primary-btn {
  background:
    linear-gradient(
      135deg,
      var(--accent),
      var(--accent-2)
    );

  color: #08111e;

  font-weight: 800;
}

.secondary-btn {
  border: 1px solid #44517a;
  color: white;
}

.secondary-btn:hover {
  background: rgba(255,255,255,0.05);
}

.hero-visual {
  border-radius: 28px;

  padding: 28px;

  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,0.10),
      rgba(255,255,255,0.03)
    );

  border:
    1px solid rgba(255,255,255,0.12);

  min-height: 420px;
}

.orbital-container {
  position: relative;

  overflow: hidden;

  height: 280px;

  border-radius: 22px;

  background:
    radial-gradient(
      circle,
      #1e2c57,
      #0c1226
    );
}

.volume-cloud {
  position: absolute;

  width: 190px;
  height: 190px;

  left: 42px;
  top: 42px;

  border-radius: 50%;

  background:
    radial-gradient(
      circle,
      rgba(255,255,255,0.55),
      rgba(255,255,255,0)
    );

  filter: blur(2px);
}

.manifold-surface {
  position: absolute;

  inset:
    72px 40px;

  border-radius: 50%;

  background:
    linear-gradient(
      135deg,
      rgba(123,200,255,0.9),
      rgba(187,156,255,0.35)
    );

  transform:
    rotateX(64deg)
    rotateZ(-18deg);

  animation:
    float 6s ease-in-out infinite;
}

@keyframes float {
  50% {
    transform:
      rotateX(62deg)
      rotateZ(-10deg)
      translateY(-8px);
  }
}

.hero-formula {
  text-align: center;
  font-size: 30px;
  margin-top: 24px;
  font-weight: 800;
}

.hero-caption {
  margin-top: 10px;
  text-align: center;
  color: #c6d2ec;
}

.tldr-section {
  max-width: 1180px;

  margin:
    40px auto;

  padding:
    28px 32px;

  background: white;

  border-radius: 24px;

  box-shadow: var(--shadow);

  border: 1px solid #e4e9f3;
}

.section-tag {
  display: inline-block;

  font-size: 12px;

  text-transform: uppercase;

  letter-spacing: 0.12em;

  color: #1772d0;

  font-weight: 800;
}

.tldr-section p {
  margin-top: 14px;
  font-size: 19px;
}

.content-section {
  max-width: 1200px;

  margin:
    0 auto;

  padding:
    50px 6vw;
}

.section-header {
  display: flex;
  gap: 16px;
  align-items: center;

  margin-bottom: 26px;
}

.section-number {
  font-weight: 900;
  color: #1772d0;
}

.section-header h2 {
  margin: 0;

  font-size: 40px;

  letter-spacing: -0.04em;
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 36px;
}

.equation-box {
  margin:
    20px 0;

  padding:
    14px 18px;

  border-radius: 18px;

  background: #eef4ff;

  border: 1px solid #d9e5fc;
}

.metric-column {
  display: grid;
  gap: 16px;
}

.metric-card,
.result-card,
.theorem-card,
.resource-card {
  background: white;

  border-radius: 22px;

  padding: 22px;

  border: 1px solid #e4e9f3;

  box-shadow: var(--shadow);
}

.metric-card span {
  display: block;
  color: #697590;
  font-size: 13px;
}

.metric-card strong {
  display: block;
  font-size: 24px;
}

.metric-card small {
  color: #697590;
}

.figure-section,
.figure-grid {
  max-width: 1200px;

  margin:
    24px auto;

  padding:
    0 6vw;
}

.figure-section figure,
.figure-grid figure {
  background: white;

  border-radius: 24px;

  padding: 16px;

  border: 1px solid #e4e9f3;

  box-shadow: var(--shadow);
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

figure figcaption {
  margin-top: 12px;
  color: #5c6781;
  font-size: 14px;
}

.dark-section {
  background: var(--bg-dark);

  color: var(--text-light);

  padding:
    60px 6vw;
}

.dark-header {
  max-width: 1200px;
  margin: 0 auto 28px auto;
}

.theorem-grid {
  max-width: 1200px;

  margin: 0 auto;

  display: grid;
  grid-template-columns: repeat(3, 1fr);

  gap: 18px;
}

.theorem-card {
  background: var(--bg-dark-2);
  border: 1px solid var(--line);
  color: var(--text-light);
}

.theorem-card p {
  color: #c6d0eb;
}

.dark-eq {
  background: #182246;
  border: 1px solid #30406d;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.interactive-section {
  max-width: 1200px;

  margin:
    0 auto;

  padding:
    60px 6vw;

  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;

  align-items: center;
}

.slider-panel {
  background: var(--bg-dark);

  color: var(--text-light);

  border-radius: 26px;

  padding: 26px;
}

.slider-panel input {
  width: 100%;
  margin-top: 16px;
}

.bar-group {
  margin-top: 24px;
  display: grid;
  gap: 18px;
}

.bar-background {
  height: 18px;
  border-radius: 999px;
  overflow: hidden;
  background: #2b3558;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
}

.full-bar {
  width: 100%;
  background: linear-gradient(
    90deg,
    #9ec7ff,
    #6f7fff
  );
}

.low-bar {
  width: 12%;
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-2)
  );
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.resource-card {
  color: #172033;
}

.resource-card strong {
  display: block;
}

.resource-card span {
  color: #697590;
}

.citation-section {
  max-width: 1200px;

  margin:
    0 auto;

  padding:
    40px 6vw
    80px;
}

.citation-section pre {
  overflow: auto;

  border-radius: 20px;

  padding: 22px;

  background: #0b1020;

  color: white;
}

#copy-bibtex {
  margin-top: 14px;

  border: none;

  background: #1772d0;

  color: white;

  padding:
    12px 18px;

  border-radius: 999px;

  font-weight: 800;

  cursor: pointer;
}

footer {
  text-align: center;
  padding:
    40px 20px;

  color: #697590;
}

@media (max-width: 900px) {

  .hero,
  .two-column,
  .interactive-section {
    grid-template-columns: 1fr;
  }

  .figure-grid,
  .theorem-grid,
  .results-grid,
  .resource-grid {
    grid-template-columns: 1fr;
  }

  .navbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .hero {
    padding-top: 50px;
  }

}
/* Slide-deck color harmonization */
:root {
  --bg-dark: #160b22;
  --bg-dark-2: #241033;
  --text-light: #fff8ef;
  --muted: #b9a7c9;
  --line: #432052;

  --accent: #60e6f2;
  --accent-2: #b93a5b;
  --gold: #e9b96b;
  --blush: #f6d7df;
  --burgundy: #7a1e3a;
  --paper-bg: #fff8ef;
  --card-bg: #ffffff;

  --shadow: 0 24px 70px rgba(42, 16, 42, 0.10);
}

body {
  background:
    radial-gradient(circle at 88% 8%, rgba(246, 215, 223, 0.55), transparent 20%),
    var(--paper-bg);
  color: #2a102a;
}

.navbar {
  background: rgba(255, 248, 239, 0.92);
  border-bottom: 1px solid #e6ccd7;
}

.brand {
  color: #2a102a;
}

.nav-right a {
  color: #7e6e82;
}

.nav-right a:hover,
.section-tag,
.section-number {
  color: var(--burgundy);
}

.hero {
  background:
    radial-gradient(circle at 82% 18%, rgba(96, 230, 242, 0.12), transparent 26%),
    radial-gradient(circle at 0% 100%, rgba(122, 30, 58, 0.68), transparent 24%),
    linear-gradient(135deg, #160b22, #100719 72%, #160b22);
}

.conference-badge,
.primary-btn {
  background: linear-gradient(135deg, var(--cyan, #60e6f2), var(--gold));
  color: #160b22;
}

.secondary-btn {
  border-color: rgba(246, 215, 223, 0.38);
  color: var(--text-light);
}

.secondary-btn:hover {
  background: rgba(246, 215, 223, 0.08);
}

.subtitle,
.authors,
.hero-caption {
  color: #e8ddf0;
}

.hero-visual {
  background: linear-gradient(180deg, rgba(246, 215, 223, 0.10), rgba(96, 230, 242, 0.04));
  border: 1px solid rgba(246, 215, 223, 0.18);
  border-radius: 18px;
}

.orbital-container {
  background:
    radial-gradient(circle at 68% 32%, rgba(96, 230, 242, 0.22), transparent 34%),
    radial-gradient(circle, #241033, #160b22);
}

.volume-cloud {
  background: radial-gradient(circle, rgba(246, 215, 223, 0.52), rgba(246, 215, 223, 0));
}

.manifold-surface {
  background: linear-gradient(135deg, rgba(96, 230, 242, 0.9), rgba(185, 58, 91, 0.42));
}

.tldr-section,
.metric-card,
.result-card,
.resource-card,
.figure-section figure,
.figure-grid figure {
  border: 1px solid #e6ccd7;
  box-shadow: var(--shadow);
}

.equation-box {
  background: #fbeaf0;
  border-color: #e6ccd7;
}

.metric-card span,
.metric-card small,
.resource-card span,
figure figcaption,
footer {
  color: #7e6e82;
}

.metric-card strong,
.result-card h3,
.resource-card strong {
  color: #2a102a;
}

.dark-section,
.slider-panel,
.citation-section pre {
  background:
    radial-gradient(circle at 82% 12%, rgba(96, 230, 242, 0.10), transparent 26%),
    linear-gradient(135deg, #160b22, #100719);
}

.theorem-card {
  background: rgba(36, 16, 51, 0.92);
  border-color: #432052;
}

.theorem-card h3 {
  color: #60e6f2;
}

.theorem-card p {
  color: #e8ddf0;
}

.dark-eq {
  background: rgba(22, 11, 34, 0.72);
  border-color: rgba(96, 230, 242, 0.34);
}

.bar-background {
  background: #432052;
}

.full-bar {
  background: linear-gradient(90deg, #b9a7c9, #f6d7df);
}

.low-bar {
  background: linear-gradient(90deg, #60e6f2, #b93a5b);
}

#copy-bibtex {
  background: var(--burgundy);
}

#copy-bibtex:hover {
  background: #b93a5b;
}