/* Extracted reusable OmniReset visual system for SimDist */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&family=Fira+Code:wght@400;500;600&display=swap');

:root {
  --honey-bronze: #d4940a;
  --hyper-magenta: #9333ea;
  --neon-violet: #a855f7;
  --cool-horizon: #3b82f6;
  --blue-energy: #2563eb;

  --bg-deep: #fafafa;
  --bg-surface: #ffffff;
  --bg-elevated: #f5f5f5;
  --bg-card: rgba(255, 255, 255, 0.95);

  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #7a7a7a;

  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-light: rgba(0, 0, 0, 0.1);

  --gradient-warm: linear-gradient(135deg, var(--honey-bronze) 0%, var(--neon-violet) 100%);
  --gradient-cool: linear-gradient(135deg, var(--cool-horizon) 0%, var(--hyper-magenta) 100%);
  --gradient-full: linear-gradient(135deg, var(--honey-bronze) 0%, var(--neon-violet) 40%, var(--blue-energy) 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 8px 40px rgba(212, 148, 10, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 120% 60% at 50% -20%, rgba(212, 148, 10, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(147, 51, 234, 0.03) 0%, transparent 50%);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  padding: 24px 28px 48px 28px;
  position: relative;
  min-height: 100vh;
  line-height: 1.7;
  font-size: clamp(12px, 2.5vw, 15px);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6,
.section-heading,
.hero-text {
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-text {
  font-weight: 700;
  letter-spacing: -0.03em;
}

.progress-sidebar {
  position: fixed;
  left: 32px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: none;
}

@media (min-width: 1400px) {
  .progress-sidebar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
  }
}

.progress-track {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.progress-line {
  position: absolute;
  left: 7px;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--border-light);
  z-index: 0;
}

.progress-line-fill {
  position: absolute;
  left: 7px;
  top: 22px;
  width: 2px;
  background: var(--honey-bronze);
  z-index: 1;
  transition: height 0.3s ease;
  height: 0;
}

.progress-item {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
}

.progress-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--border-light);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.progress-item.active .progress-dot {
  background: var(--honey-bronze);
  border-color: var(--honey-bronze);
  box-shadow: 0 0 0 5px rgba(212, 148, 10, 0.2);
}

.progress-item.passed .progress-dot {
  background: var(--honey-bronze);
  border-color: var(--honey-bronze);
}

.progress-label {
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  transform: translateX(0);
  transition:
    color 0.2s ease,
    opacity 0.22s ease,
    max-width 0.32s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 1;
  max-width: 320px;
}

@media (hover: hover) {
  .progress-label {
    opacity: 0;
    max-width: 0;
    overflow: hidden;
  }

  .progress-item.active .progress-label {
    opacity: 1;
    max-width: 320px;
    overflow: visible;
  }

  .progress-sidebar:hover .progress-label,
  .progress-sidebar:focus-within .progress-label {
    opacity: 1;
    max-width: 320px;
    overflow: visible;
  }
}

.progress-item.active .progress-label {
  color: var(--honey-bronze);
}

.progress-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.main-content {
  max-width: 1060px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-flow {
  position: relative;
  overflow: hidden;
  padding: 24px 48px 40px 48px;
  border-radius: 28px;
  margin-bottom: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
}

.hero-flow::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  top: -250px;
  left: -150px;
  background: radial-gradient(circle, rgba(212, 148, 10, 0.12) 0%, rgba(212, 148, 10, 0) 70%);
  animation: orbFlow1 25s ease-in-out infinite;
  z-index: 0;
  pointer-events: none;
}

.hero-flow::after {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  bottom: -200px;
  right: -100px;
  background: radial-gradient(circle, rgba(147, 51, 234, 0.08) 0%, rgba(147, 51, 234, 0) 70%);
  animation: orbFlow2 30s ease-in-out infinite;
  z-index: 0;
  pointer-events: none;
}

.hero-flow > * {
  position: relative;
  z-index: 1;
}

.hero-flow .hero-orb {
  position: absolute;
  width: 450px;
  height: 450px;
  top: 40%;
  right: 10%;
  transform: translateY(-50%);
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, rgba(37, 99, 235, 0) 70%);
  animation: orbFlow3 28s ease-in-out infinite;
  z-index: 0;
  pointer-events: none;
}

@keyframes orbFlow1 {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(80px, 40px); }
  50% { transform: translate(120px, -20px); }
  75% { transform: translate(40px, 60px); }
}

@keyframes orbFlow2 {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-60px, -50px); }
  50% { transform: translate(-100px, 30px); }
  75% { transform: translate(-30px, -40px); }
}

@keyframes orbFlow3 {
  0%, 100% { transform: translateY(-50%) translate(0, 0); }
  33% { transform: translateY(-50%) translate(-50px, 70px); }
  66% { transform: translateY(-50%) translate(40px, -50px); }
}

.hero-text {
  font-size: 80px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0 0 8px;
  text-align: center;
  color: var(--text-primary);
}

.sub-hero-text {
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-size: 26px;
  font-weight: 400;
  font-style: normal;
  margin: 0 auto 16px;
  line-height: 1.5;
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
}

.hero-video-wrap {
  width: 100%;
  max-width: 960px;
  margin: 0 auto 20px auto;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.hero-video-wrap video {
  display: block;
  width: 100%;
  border-radius: 14px;
}

.venue-badge {
  text-align: center;
  margin-bottom: 28px;
}

.venue-badge span {
  display: inline-block;
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #4b2e83;
  background: rgba(75, 46, 131, 0.08);
  border: 1px solid rgba(75, 46, 131, 0.18);
  border-radius: 8px;
  padding: 6px 18px;
}

.hero-flow .authors {
  text-align: center;
}

.authors {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2;
  margin-top: 0;
  margin-bottom: 32px;
  text-align: center;
}

.authors span {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.authors .affiliation {
  font-family: 'Inter', -apple-system, sans-serif;
  font-style: normal;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}

.authors a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.authors a:hover {
  color: var(--honey-bronze);
}

.authors sup {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 1px;
}

.authors .author-note {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  margin-bottom: 4px;
}

.authors .affiliation sup {
  font-size: 9px;
  margin-right: 2px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 28px;
}

.cta {
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  background: transparent;
  transition: all 0.25s ease;
}

.cta.primary {
  background: var(--honey-bronze);
  border-color: var(--honey-bronze);
  color: #000;
  font-weight: 600;
}

.cta.ghost {
  border-color: rgba(255, 184, 74, 0.3);
  color: var(--honey-bronze);
}

.cta.dark {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: #fff;
}

.cta.dark:hover {
  background: #000;
  border-color: #000;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.cta.primary:hover {
  box-shadow: 0 12px 32px rgba(255, 184, 74, 0.35);
}

.hero-waves {
  position: relative;
  width: 100%;
  height: 70px;
  margin-top: 24px;
  overflow: hidden;
  opacity: 0.7;
}

.waves-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.wave-parallax use {
  animation: waveShift 16s cubic-bezier(0.55, 0.5, 0.45, 0.5) infinite;
}

.wave-parallax use:nth-child(1) { animation-delay: -2s; animation-duration: 16s; }
.wave-parallax use:nth-child(2) { animation-delay: -4s; animation-duration: 14s; }
.wave-parallax use:nth-child(3) { animation-delay: -6s; animation-duration: 20s; }
.wave-parallax use:nth-child(4) { animation-delay: -8s; animation-duration: 18s; }

@keyframes waveShift {
  0% { transform: translate3d(-90px, 0, 0); }
  50% { transform: translate3d(20px, 0, 0); }
  100% { transform: translate3d(-90px, 0, 0); }
}

.tagline {
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  background: transparent;
  color: var(--text-primary);
  display: block;
  padding: 48px 0 0 0;
  margin: 24px 0 20px 0;
  border: none;
  position: relative;
}

.tagline::before {
  display: none;
}

.tagline::after {
  content: '';
  display: block;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--honey-bronze) 0%, rgba(212, 148, 10, 0.15) 40%, transparent 100%);
  border-radius: 2px;
  margin-bottom: 12px;
  margin-top: 24px;
}

.interactive-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--honey-bronze);
  background: rgba(212, 148, 10, 0.1);
  border: 1px solid rgba(212, 148, 10, 0.3);
  padding: 4px 10px;
  border-radius: 100px;
  vertical-align: middle;
  margin-left: 8px;
  position: relative;
  top: -3px;
}

.card-surface {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.section-world-models {
  position: relative;
}

.world-models-section-box {
  position: relative;
}

.section-world-models .section-head h3 {
  margin: 0;
}

.section-task-structure {
  position: relative;
}

.task-structure-section-box {
  position: relative;
}

.section-task-structure .section-head h3 {
  margin: 0;
}

.card-surface:hover {
  box-shadow: var(--shadow-lg);
}

img {
  width: 100%;
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  margin: 0;
  box-sizing: border-box;
  box-shadow: var(--shadow-md);
}

video[poster] {
  background-color: var(--bg-elevated);
  background-size: cover;
  background-position: center;
  object-fit: cover;
}

video[data-src]:not([src]) {
  animation: posterShimmer 2s ease-in-out infinite;
}

@keyframes posterShimmer {
  0% { opacity: 0.92; }
  50% { opacity: 0.7; }
  100% { opacity: 0.92; }
}

.real-world-video-frame {
  position: relative;
  width: 100%;
}

.real-world-fs-btn {
  position: absolute;
  bottom: 10px;
  right: 10px;
  z-index: 2;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: background 0.2s ease, transform 0.2s ease;
}

.real-world-fs-btn:hover {
  background: rgba(0, 0, 0, 0.72);
  transform: scale(1.06);
}

.real-world-fs-btn:focus-visible {
  outline: 2px solid var(--honey-bronze);
  outline-offset: 2px;
}

.real-world-video-frame video,
.real-world-grid-cell video,
.real-world-column-video video,
.real-world-single-video video,
.uncut-evaluations-video-wrap video,
.reset-distribution-video-wrap video,
.emergent-dexterity-video-wrap video,
.pipeline-card video,
.hero-video-wrap video,
.learning-over-time-video-wrap video {
  width: 100%;
  display: block;
}
.real-world-common-caption {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.7;
  margin: 0;
  text-align: center;
}
.real-world-caption-top {
  margin-bottom: 24px;
}

.code-details {
  margin-top: 20px;
  text-align: left;
}

.code-summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--honey-bronze);
  text-align: center;
  padding: 10px;
  list-style: none;
  user-select: none;
}

.code-summary::-webkit-details-marker {
  display: none;
}

.code-summary::before {
  content: "▸ ";
}

details[open] > .code-summary::before {
  content: "▾ ";
}

.code-summary:hover {
  text-decoration: underline;
}

.code-block {
  background: #1a1a2e;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 8.5px;
  line-height: 1.45;
  color: #e0def4;
  margin-top: 12px;
  max-height: 350px;
  overflow-y: auto;
  white-space: pre;
  word-wrap: normal;
}

.bibtex-code {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 32px;
  border-radius: 20px;
  margin: 88px auto -44px;
  max-width: 1000px;
  box-sizing: border-box;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}

.bibtex-title {
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.bibtex-code pre {
  white-space: pre;
  overflow-x: auto;
  margin: 0;
}

.bibtex-code code {
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.7;
}

.footer {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 120px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 40px;
  text-align: center;
}

.footer a {
  color: var(--honey-bronze);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.footer a:hover {
  opacity: 0.8;
}

::selection {
  background: rgba(255, 184, 74, 0.25);
  color: var(--text-primary);
}

:focus-visible {
  outline: 2px solid var(--honey-bronze);
  outline-offset: 3px;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-elevated);
}

::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

video:fullscreen,
video:-webkit-full-screen {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0;
  box-shadow: none;
  background: #000;
}

@media (max-width: 768px) {
  body {
    padding: 16px 10px;
    font-size: 14px;
  }

  .hero-text {
    font-size: 42px;
  }

  .sub-hero-text {
    font-size: 17px;
  }

  .hero-flow {
    padding: 32px 16px 28px 16px;
    border-radius: 20px;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .top-nav {
    padding: 12px 18px;
    gap: 10px;
  }

  .nav-links {
    display: none;
  }

  .tagline {
    font-size: 22px;
  }

  .card-surface {
    padding: 16px;
    border-radius: 16px;
  }

  .section-heading {
    font-size: 22px;
  }

  .bibtex-code {
    padding: 16px;
    font-size: 12px;
  }

  .bibtex-code code {
    font-size: 10px;
  }

  .authors {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .hero-text {
    font-size: 34px;
  }

  .sub-hero-text {
    font-size: 15px;
  }

  .hero-flow {
    padding: 24px 12px 24px 12px;
  }

  .cta {
    font-size: 13px;
    padding: 10px 16px;
  }

  .tagline {
    font-size: 20px;
  }

  .card-surface {
    padding: 12px;
  }
}