/* ========================================
   DESIGN TOKENS
   ======================================== */
:root {
  /* Color Palette (matching RealPDEBench) */
  --lavender-main: #D8D4E6;
  --lavender-light: #EBE9F5;
  --lavender-dark: #B6B1CA;
  --surface: #F9F9FC;
  --slate: #696285;
  --carbon: #1D1D1F;
  --platinum: #F5F5F7;

  /* Accent (low-saturation mint) */
  --mint-light: #BFD9CF;
  --mint-mid: #9FC2B4;
  --mint-dark: #4E776B;

  /* Accent (mint-green, matching RealPDEBench) */
  --accent: #4E776B;
  --accent-mid: #9FC2B4;
  --accent-bright: #34cda3;

  /* Medals */
  --gold: #D4A853;
  --silver: #A8A8A8;
  --bronze: #CD7F32;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Fraunces", ui-serif, Georgia, serif;

  /* Layout */
  --max-w: 1200px;
  --spacing-xl: 120px;
  --spacing-lg: 80px;
  --spacing-md: 40px;
  --spacing-sm: 24px;
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--carbon);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 60px;
  /* clip (not hidden) so iOS Safari doesn't establish a scroll context that
     blocks vertical pan when combined with the rp-scale wrapper. */
  overflow-x: clip;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-optical-sizing: auto;
  line-height: 1.15;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

::selection {
  background: var(--lavender-main);
  color: var(--carbon);
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(249, 249, 252, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(216, 212, 230, 0.3);
  height: 60px;
}

.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--carbon);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
  margin-right: 24px;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--carbon);
  text-decoration: none;
}

/* Underline hover animation (matching RealPDEBench) */
.nav-links a:not(.btn-nav)::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0; right: 0;
  height: 2px;
  background: var(--lavender-main);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.nav-links a:not(.btn-nav):hover::after {
  transform: scaleX(1);
}

/* Nav CTA button — pill-shaped, carbon */
.nav-links .btn-nav {
  background: var(--carbon);
  color: #fff;
  padding: 8px 20px;
  border-radius: 100px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.nav-links .btn-nav:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(29, 29, 31, 0.2);
  color: #fff;
}

/* Submit dropdown — single-line light rows per track */
.nav-submit { position: relative; display: inline-flex; }
.nav-submit-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  border: none; cursor: pointer; font-family: inherit;
  font-size: 0.875rem; font-weight: 500;
}
.nav-caret { font-size: 0.7em; line-height: 1; transition: transform 0.3s ease; }
.nav-submit:hover .nav-caret,
.nav-submit:focus-within .nav-caret { transform: rotate(180deg); }

.nav-submit-menu {
  position: absolute; top: 100%; right: 0;
  margin-top: 12px; min-width: 236px;
  background: #fff;
  border: 1px solid rgba(216, 212, 230, 0.6);
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(29, 29, 31, 0.14);
  padding: 8px;
  display: flex; flex-direction: column; gap: 4px;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 200;
}
.nav-submit-menu::before {
  content: ''; position: absolute; top: -12px; left: 0; right: 0; height: 12px;
}
.nav-submit:hover .nav-submit-menu,
.nav-submit:focus-within .nav-submit-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}

.nav-submit-menu a {
  display: block;
  padding: 10px 14px; border-radius: 11px;
  font-size: 0.9rem; font-weight: 600; color: var(--carbon);
  text-decoration: none; white-space: nowrap;
}
.nav-links .nav-submit-menu a::after { display: none; }
.nav-submit-menu a:hover { background: var(--lavender-light); color: var(--carbon); }
.nav-submit-group {
  padding: 8px 14px 2px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--mint-dark);
}
.nav-submit-divider { height: 1px; margin: 4px 8px 0; background: var(--lavender-light); }

@media (max-width: 1100px) {
  .nav-submit { position: static; display: block; }
  .nav-submit-toggle { display: none; }
  .nav-submit-menu {
    position: static; opacity: 1; visibility: visible; transform: none;
    margin: 0; min-width: 0; padding: 0;
    background: transparent; border: none; box-shadow: none;
  }
  .nav-submit-menu::before { display: none; }
  .nav-links .nav-submit-menu a { padding: 14px 24px; border-radius: 0; }
  .nav-submit-menu a:hover { background: var(--lavender-light); }
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--carbon);
  margin: 4px 0;
  border-radius: 2px;
  transition: 0.2s;
}

/* ========================================
   BUTTONS (matching RealPDEBench)
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 100px;
  font-weight: 500;
  font-size: 1rem;
  transition: all 0.3s ease;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--carbon);
  color: #fff;
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(29, 29, 31, 0.2);
  color: #fff;
}

.btn-outline {
  color: var(--slate);
  background: transparent;
  border: 2px solid var(--lavender-main);
  padding: 12px 32px;
}

.btn-outline:hover {
  background: var(--lavender-light);
  border-color: var(--lavender-dark);
  color: var(--carbon);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  padding: 64px 24px var(--spacing-lg);
  position: relative;
  /* x stays clipped (flow canvas edges); y must stay visible so the
     hero CTA cascade can hang below the section edge */
  overflow-x: clip;
  overflow-y: visible;
  z-index: 2;
}

#hero-flow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* Subtle gradient background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 30% 40%, rgba(216, 212, 230, 0.35) 0%, transparent 70%);
  pointer-events: none;
}

/* Section pre-label */
/* Solid mint pill: as plain slate text this line disappeared into the flow-field
   background, and the NeurIPS venue is the hero's strongest credential. */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: #fff;
  background: var(--accent-bright);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 11px 24px;
  border-radius: 100px;
  box-shadow: 0 8px 26px rgba(52, 205, 163, 0.38);
  margin-bottom: 26px;
}

.hero-badge svg { color: #fff; }

@media (max-width: 768px) {
  .hero-badge {
    font-size: 0.9rem;
    padding: 9px 18px;
    letter-spacing: 0.08em;
  }
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 11vw, 8.5rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 0.95;
  margin: 0.4rem 0 1.5rem;
  color: var(--carbon);
}
.hero h1 br { display: block; }

.hero h1 .hero-gradient-mint {
  background: linear-gradient(135deg,
    var(--mint-light) 0%,
    var(--mint-mid) 55%,
    var(--mint-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--carbon);
  opacity: 0.7;
  max-width: 760px;
  line-height: 2.0;
  font-weight: 500;
  margin-bottom: 2rem;
}

/* Per-line faint white wash so canvas particles still show through, but text contrast lifts.
   box-decoration-break: clone hugs each wrapped line individually. */
.hero-sub-text {
  background: rgba(255, 255, 255, 0.20);
  padding: 4px 12px;
  border-radius: 4px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

/* Countdown */
.countdown-wrap {
  display: flex;
  gap: 14px;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.countdown-item {
  background: white;
  border-radius: 14px;
  padding: 14px 20px;
  min-width: 88px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--lavender-light);
}

.countdown-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--carbon);
  line-height: 1;
}

.countdown-label {
  font-size: 0.72rem;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

.countdown-target {
  font-size: 0.88rem;
  color: var(--slate);
  margin-bottom: 10px;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero CTA cascade: click a track button to reveal Register (form) + Codabench */
.cta-cascade { position: relative; display: inline-flex; width: 270px; }
.cta-toggle {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.92rem;
}
.cta-caret { font-size: 0.95em; line-height: 1; transition: transform 0.3s ease; }
.cta-cascade.open .cta-caret { transform: rotate(180deg); }
.cta-menu {
  position: absolute; top: 100%; left: 0;
  padding-top: 8px; width: 100%;
  display: flex; flex-direction: column; gap: 6px;
  z-index: 150;
  pointer-events: none;
}
.cta-cascade.open .cta-menu,
.cta-cascade:focus-within .cta-menu { pointer-events: auto; }
.cta-menu > a,
.cta-menu > .cta-soon {
  display: block; width: 100%; box-sizing: border-box;
  padding: 14px 20px; border-radius: 100px;
  background: var(--carbon); color: #fff;
  font-size: 1rem; font-weight: 500;
  text-decoration: none; white-space: nowrap; text-align: center;
  opacity: 0; visibility: hidden; transform: translateY(-10px);
  transition: all 0.3s ease;
}
.cta-menu > *:nth-child(2) { transition-delay: 0.06s; }
.cta-cascade.open .cta-menu > a,
.cta-cascade.open .cta-menu > .cta-soon,
.cta-cascade:focus-within .cta-menu > a,
.cta-cascade:focus-within .cta-menu > .cta-soon {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.cta-cascade:focus-within .cta-caret { transform: rotate(180deg); }
@media (hover: hover) and (pointer: fine) {
  .cta-cascade:hover .cta-menu { pointer-events: auto; }
  .cta-cascade:hover .cta-menu > a,
  .cta-cascade:hover .cta-menu > .cta-soon {
    opacity: 1; visibility: visible; transform: translateY(0);
  }
  .cta-cascade:hover .cta-caret { transform: rotate(180deg); }
}
.cta-menu > a:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(29, 29, 31, 0.2);
  color: #fff;
}
.cta-soon { opacity: 0.55; cursor: not-allowed; }

.tag-row {
  display: flex;
  gap: 8px;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(52, 205, 163, 0.1);
  color: var(--accent-bright);
  border: 1px solid rgba(52, 205, 163, 0.18);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: var(--spacing-lg) 24px;
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-alt { background: var(--lavender-light); }
.section-title em {
  font-style: italic;
  font-weight: inherit;
  color: var(--accent-bright);
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--slate);
  margin-bottom: var(--spacing-md);
  max-width: 700px;
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Centered variant */
.text-center { text-align: center; }
.section-title.text-center + .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   FEATURE / INFO CARDS
   ======================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  border-radius: 20px;
  padding: 32px;
  border: 1px solid var(--lavender-light);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 80%;
  height: 80%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10rem;
  opacity: 0.08;
  pointer-events: none;
  color: var(--carbon);
  filter: grayscale(1);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--slate);
  line-height: 1.65;
}

/* ========================================
   CITATION
   ======================================== */
.cite-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.cite-card {
  background: white;
  border-radius: 20px;
  border: 1px solid var(--lavender-light);
  padding: 24px 24px 20px;
  display: flex;
  flex-direction: column;
}

.cite-card-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.cite-card-head h3 {
  font-size: 1.1rem;
  margin-bottom: 2px;
}

.cite-venue {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--mint-dark);
}

.cite-actions {
  margin-left: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cite-repo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--lavender-main);
  border-radius: 100px;
  padding: 6px 14px;
  color: var(--slate);
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.cite-repo:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cite-repo-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* .cite-copy carries its own margin-left:auto for the no-sibling case; inside the
   action row that would shove the two buttons apart. */
.cite-actions .cite-copy {
  margin-left: 0;
}

.cite-copy {
  margin-left: auto;
  flex-shrink: 0;
  border: 1px solid var(--lavender-main);
  background: transparent;
  color: var(--slate);
  border-radius: 100px;
  padding: 6px 16px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cite-copy:hover {
  border-color: var(--mint-mid);
  color: var(--mint-dark);
}

.cite-copy.copied {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  color: #fff;
}

.cite-bib {
  flex: 1;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--lavender-light);
  border-radius: 12px;
  padding: 16px 18px;
  font-family: var(--font-mono, "SFMono-Regular", monospace);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--carbon);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ========================================
   TRACKS
   ======================================== */
.tracks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.track-card {
  background: white;
  border-radius: 20px;
  padding: 36px;
  border: 1px solid var(--lavender-light);
  position: relative;
  overflow: hidden;
}

.track-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
}

.track-card--sim2real::before { background: linear-gradient(90deg, var(--carbon), var(--slate)); }
.track-card--lttta::before { background: linear-gradient(90deg, var(--mint-dark), var(--mint-mid)); }

.track-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}

.track-tag--purple { background: rgba(78, 119, 107, 0.1); color: var(--accent); }
.track-tag--mint { background: rgba(78, 119, 107, 0.1); color: var(--mint-dark); }

.track-card h3 { font-size: 1.3rem; margin-bottom: 12px; }
.track-card p { font-size: 0.9rem; color: var(--slate); line-height: 1.7; }
.track-card ul { margin-top: 14px; padding-left: 18px; font-size: 0.9rem; color: var(--slate); }
.track-card ul li { margin-bottom: 8px; line-height: 1.6; }

.track-cta {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--lavender-light);
}

.tracks-register-note {
  color: var(--slate);
  margin: 0 0 var(--spacing-md);
  max-width: 760px;
  font-size: 0.95rem;
  line-height: 1.7;
}
.tracks-register-note strong { color: var(--mint-dark); font-weight: 600; }

.btn-mint-outline {
  color: var(--mint-dark);
  background: transparent;
  border: 2px solid var(--mint-mid);
  padding: 10px 24px;
  font-size: 0.85rem;
}

.btn-mint-outline:hover {
  background: rgba(78, 119, 107, 0.08);
  border-color: var(--mint-dark);
  color: var(--mint-dark);
}

.track-cta-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--slate);
  line-height: 1.6;
}

/* ========================================
   TIMELINE
   ======================================== */
.timeline { position: relative; padding-left: 36px; }

.timeline::before {
  content: '';
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--lavender-main);
  border-radius: 1px;
}

.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -36px; top: 4px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: white;
  border: 2.5px solid var(--lavender-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-dot--done { background: var(--carbon); border-color: var(--carbon); }
.timeline-dot--done::after { content: '\2713'; color: white; font-size: 0.7rem; font-weight: 700; }
.timeline-dot--active { border-color: var(--carbon); box-shadow: 0 0 0 4px rgba(29, 29, 31, 0.1); }

.timeline-date { font-size: 0.8rem; font-weight: 600; color: var(--slate); margin-bottom: 2px; }
.timeline-title { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.timeline-desc { font-size: 0.88rem; color: var(--slate); line-height: 1.6; }

/* ========================================
   PRIZES
   ======================================== */
.prizes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}

.prize-card {
  background: white;
  border-radius: 20px;
  padding: 36px 24px;
  border: 1px solid var(--lavender-light);
  transition: transform 0.2s;
}

.prize-card:hover { transform: translateY(-3px); }
.prize-medal { font-size: 2.5rem; margin-bottom: 10px; }
.prize-rank {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 400;
  color: var(--lavender-dark);
  line-height: 1;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.prize-place { font-family: var(--font-serif); font-weight: 700; font-size: 1.15rem; margin-bottom: 6px; }

.prize-amount {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.prize-amount--gold { color: var(--gold); }
.prize-amount--silver { color: var(--silver); }
.prize-amount--bronze { color: var(--bronze); }
.prize-note { font-size: 0.82rem; color: var(--slate); }

/* ========================================
   METRICS
   ======================================== */
.metrics-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.metric-item {
  background: white;
  border-radius: 16px;
  padding: 24px;
  border: 1px solid var(--lavender-light);
}

.metric-item h4 { font-size: 1rem; margin-bottom: 8px; }
.metric-item p { font-size: 0.85rem; color: var(--slate); line-height: 1.6; }

/* ========================================
   RULES TABLE
   ======================================== */
.rules-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: white;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--lavender-light);
}

.rules-table th {
  background: var(--lavender-light);
  text-align: left;
  padding: 14px 20px;
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.rules-table td {
  padding: 14px 20px;
  border-top: 1px solid var(--lavender-light);
  color: var(--slate);
}

.rules-table tr:hover td { background: var(--platinum); }

/* ========================================
   IMPORTANT DATES (compact)
   ======================================== */
.dates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.date-card {
  background: white;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--lavender-light);
  text-align: center;
}

.date-card .date-val {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--carbon);
  margin-bottom: 4px;
}

.date-card .date-label { font-size: 0.8rem; color: var(--slate); }

/* ========================================
   FOOTER
   ======================================== */
/* Lab badge — organizers attribution */
.lab-badge-row { display: flex; justify-content: center; margin-top: 48px; }
.lab-badge {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 10px 24px 10px 12px;
  background: #fff;
  border-radius: 100px;
  text-decoration: none;
  box-shadow: 0 2px 12px rgba(29, 29, 31, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.lab-badge img { width: 36px; height: 36px; display: block; }
.lab-badge span { font-size: 0.95rem; font-weight: 600; color: var(--carbon); white-space: nowrap; }
.lab-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(29, 29, 31, 0.1);
}
.lab-credit {
  text-align: center;
  font-size: 0.9rem;
  color: var(--slate);
  margin-top: 14px;
}

footer {
  background: var(--carbon);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--spacing-md) 24px;
  text-align: center;
  font-size: 0.82rem;
}

footer a { color: var(--accent-mid); }

.footer-inner { max-width: var(--max-w); margin: 0 auto; }

.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a { color: rgba(255, 255, 255, 0.8); text-decoration: none; }
.footer-links a:hover { color: white; }

/* ========================================
   UTILITIES
   ======================================== */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.divider { width: 60px; height: 3px; background: var(--lavender-main); margin: 20px auto; border-radius: 2px; }

/* ========================================
   COMPARE BAND (two side-by-side sliders at native 86×64 aspect)
   Ported from realpdebench: left card has REAL base + SIM overlay; right card mirrors.
   Container-bounded (no longer full-bleed) so each card stays small enough that
   native-resolution pixels stay crisp under image-rendering: pixelated.
   ======================================== */
.hero-compare-band {
  position: relative;
  margin: var(--spacing-md) auto calc(-0.5 * var(--spacing-lg));
  padding: 0;
  max-width: 1080px;
}
.rp-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.rp-compare {
  position: relative;
  width: 100%;
  border-radius: 0;
  overflow: hidden;
  aspect-ratio: 86 / 54; /* native 86×64, crop ~5px top + 5px bottom via object-fit: cover */
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(216, 212, 230, 0.55);
  cursor: ew-resize;
  /* Horizontal drag captured by pointermove; vertical pan stays with browser
     so the user can scroll the page through the slider on touch screens. */
  touch-action: pan-y;
  --rp-split: 25%;
}
.rp-compare img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  user-select: none;
  -webkit-user-drag: none;
}
.rp-compare-overlay {
  position: absolute;
  inset: 0;
  clip-path: inset(0 calc(100% - var(--rp-split)) 0 0);
  z-index: 2;
}
.rp-compare-label {
  position: absolute;
  top: 18px;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: clamp(0.95rem, 1.4vw, 1.2rem);
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
  user-select: none;
  pointer-events: none;
}
.rp-compare-label--base {
  right: 22px;
  z-index: 1;
}
.rp-compare-overlay .rp-compare-label--overlay {
  left: 22px;
  z-index: 3;
}
.rp-compare::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--rp-split);
  width: 2px;
  transform: translateX(-1px);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 0 0 1px rgba(33, 33, 33, 0.12), 0 6px 18px rgba(0, 0, 0, 0.12);
  pointer-events: none;
  z-index: 6;
}
.rp-compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--rp-split);
  transform: translateX(-50%);
  width: 44px;
  outline: none;
  z-index: 5;
}
.rp-compare-handle::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 34px;
  height: 34px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: rgba(249, 249, 252, 0.9);
  border: 1px solid rgba(216, 212, 230, 0.55);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
}
.rp-compare-handle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 14px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: rgba(105, 98, 133, 0.22);
  border: 1px solid rgba(105, 98, 133, 0.32);
}
.rp-compare-handle:focus-visible::before {
  box-shadow: 0 0 0 3px rgba(185, 175, 215, 0.55), 0 10px 26px rgba(0, 0, 0, 0.18);
}
.hero-compare-meta {
  margin: 0;
  padding: 14px 24px 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  justify-content: center;
  font-family: var(--font-mono, "SFMono-Regular", monospace);
  font-size: 0.82rem;
  color: var(--slate);
}
.hero-compare-meta__kicker {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint-dark);
  font-size: 0.7rem;
}
.hero-compare-meta__sep { color: var(--lavender-dark); }
.hero-compare-meta__hint {
  font-family: var(--font-sans);
  font-style: italic;
  color: var(--lavender-dark);
}

/* ========================================
   FLOW REGIME MAP
   ======================================== */
.regime-figure {
  max-width: 760px;
  margin: 64px auto 0;
  background: #fff;
  border: 1px solid rgba(216, 212, 230, 0.55);
  border-radius: 14px;
  padding: 36px 44px 28px;
}
.regime-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--carbon);
  text-align: center;
  margin: 0 0 28px;
}
.regime-title em {
  font-style: italic;
  color: var(--accent-bright);
}
.regime-plot {
  display: grid;
  grid-template-columns: 18px 36px 1fr;
  gap: 12px;
  align-items: stretch;
}
.regime-yaxis-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
  align-self: center;
  justify-self: center;
}
.regime-yaxis {
  display: grid;
  grid-template-rows: repeat(5, 1fr);
  font-family: var(--font-mono, "SFMono-Regular", monospace);
  font-size: 0.72rem;
  color: var(--slate);
  text-align: right;
  align-items: center;
}
.regime-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 6px;
}
.regime-cell {
  background: var(--lavender-light);
  border-radius: 6px;
  aspect-ratio: 86 / 64;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.regime-cell:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(33, 33, 33, 0.10);
}
.regime-cell--gif { padding: 0; background: #fff; }
.regime-cell--gif img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.regime-xaxis {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-top: 10px;
  /* Indent to align under regime-grid: 18px label col + 12px gap + 36px values + 12px gap */
  padding-left: calc(18px + 12px + 36px + 12px);
  font-family: var(--font-mono, "SFMono-Regular", monospace);
  font-size: 0.72rem;
  color: var(--slate);
  text-align: center;
}
.regime-xaxis-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
  text-align: center;
  margin-top: 8px;
  padding-left: calc(18px + 12px + 36px + 12px);
}
.regime-caption {
  font-size: 0.85rem;
  color: var(--slate);
  text-align: center;
  margin-top: 24px;
  font-style: italic;
  line-height: 1.55;
}

/* ========================================
   ORGANIZERS
   ======================================== */
.organizer-group-title {
  text-align: center;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--slate);
  margin: 56px 0 24px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.organizer-group-title:first-of-type { margin-top: 36px; }

/* Featured (Lead Organizer) */
.organizer-featured {
  max-width: 760px;
  margin: 0 auto;
}
.organizer-card {
  background: white;
  border: 1px solid rgba(216, 212, 230, 0.55);
  border-radius: 14px;
  padding: 22px 20px 20px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.organizer-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.07);
  border-color: var(--lavender-main);
}
.organizer-card--featured {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  text-align: left;
  padding: 28px 32px;
  align-items: center;
}
.organizer-body { min-width: 0; }

/* Photo sizing — rounded-square instead of circle for varied headshots */
.organizer-photo {
  width: 128px;
  height: 128px;
  object-fit: cover;
  border-radius: 14px;
  margin: 0 auto 14px;
  display: block;
  background: var(--lavender-light);
  box-shadow: 0 6px 18px rgba(105, 98, 133, 0.08);
}
.organizer-photo--lg {
  width: 144px;
  height: 144px;
  border-radius: 14px;
}
.organizer-photo--xl {
  width: 200px;
  height: 200px;
  border-radius: 16px;
  margin: 0;
}

.organizer-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--carbon);
  margin-bottom: 4px;
  line-height: 1.3;
}
.organizer-name--lg {
  font-size: 1.6rem;
  margin-bottom: 6px;
}
.organizer-affil {
  font-size: 0.82rem;
  color: var(--slate);
  line-height: 1.45;
  margin-bottom: 8px;
}
.organizer-affil--lg {
  font-size: 0.95rem;
  margin-bottom: 12px;
}
.organizer-role {
  font-size: 0.75rem;
  color: var(--accent);
  font-style: italic;
  line-height: 1.5;
}
.organizer-role--lead {
  font-style: normal;
  font-size: 0.82rem;
  color: var(--slate);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(216, 212, 230, 0.6);
}
.organizer-bio {
  font-size: 0.92rem;
  color: var(--slate);
  line-height: 1.6;
  margin: 10px 0 0;
  text-align: left;
}
.organizer-bio--sm {
  font-size: 0.82rem;
  line-height: 1.55;
  margin-top: 10px;
}

/* Grids — flex so the orphan tail row centers */
.organizer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
  max-width: 1100px;
  margin: 0 auto;
}
.organizer-grid--contrib > .organizer-card {
  flex: 0 1 220px;
  max-width: 240px;
}
.organizer-grid--advisor > .organizer-card {
  flex: 0 1 245px;
  max-width: 260px;
}

/* "Coming Soon" disabled-style buttons */
.btn.is-soon, .btn-nav.is-soon {
  opacity: 0.55;
  pointer-events: none;
  cursor: not-allowed;
}
.footer-soon {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .organizer-card--featured {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 24px 20px;
  }
  .organizer-photo--xl {
    margin: 0 auto;
    width: 160px;
    height: 160px;
  }
  .organizer-bio { text-align: center; }
}

/* Anchor offset for fixed nav */
section[id] { scroll-margin-top: 76px; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1280px) {
  .navbar-inner { padding: 0 16px; }
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 0.85rem; }
}

@media (max-width: 1100px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: rgba(249, 249, 252, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid rgba(216, 212, 230, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 24px; font-size: 1rem; }
  .nav-links a::after { display: none; }
  .nav-links a:not(.btn-nav):hover { background: var(--lavender-light); }
  .nav-links .btn-nav { margin: 8px 24px; text-align: center; }
  .nav-toggle { display: block; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: rgba(249, 249, 252, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid rgba(216, 212, 230, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  }

  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 24px; font-size: 1rem; }
  .nav-links a::after { display: none; }
  .nav-links a:not(.btn-nav):hover { background: var(--lavender-light); }
  .nav-links .btn-nav { margin: 8px 24px; text-align: center; }

  .nav-toggle { display: block; }
  .tracks-grid { grid-template-columns: 1fr; }
  .prizes-grid { grid-template-columns: 1fr; }
  .countdown-item { min-width: 68px; padding: 10px 14px; }
  .countdown-num { font-size: 1.5rem; }
  .hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
  .section-title { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
}



/* ========================================
   PROPORTIONAL CONTENT SCALE (mirrors realpdebench)
   Below 768px viewport, lock layout at 768px and scale-down via transform.
   Navbar stays at viewport width (fixed position, outside the scale wrapper).
   ======================================== */
.rp-scale-outer { position: relative; }
.rp-scale-outer.rp-scale-active { overflow: clip; }
.rp-scale-outer.rp-scale-active .rp-scale-inner {
  width: 768px;
  transform: scale(var(--rp-page-scale, 1));
  transform-origin: top left;
}