/* ─────────────────────────────────────────
   AI MARATHON · Landing Page
   ───────────────────────────────────────── */

:root {
  --bg: #07070f;
  --bg-elev: #0d0d1a;
  --surface: rgba(20, 20, 36, 0.55);
  --surface-strong: rgba(28, 28, 48, 0.78);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);

  --text: #f4f4ff;
  --text-dim: rgba(244, 244, 255, 0.7);
  --text-mute: rgba(244, 244, 255, 0.45);

  --accent: #22d3ee;        /* cyan */
  --accent-2: #a855f7;      /* violet */
  --accent-3: #f472b6;      /* magenta */
  --accent-warm: #fbbf24;   /* amber */
  --accent-good: #4ade80;   /* mint  */

  --grad-hero: linear-gradient(135deg, #22d3ee 0%, #a855f7 50%, #f472b6 100%);
  --grad-soft: linear-gradient(135deg, rgba(34, 211, 238, 0.18), rgba(168, 85, 247, 0.18) 50%, rgba(244, 114, 182, 0.18));

  --radius: 16px;
  --radius-lg: 22px;
  --radius-sm: 10px;

  --maxw: 1180px;

  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.55;
  overflow-x: hidden;
  position: relative;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img, svg { display: block; max-width: 100%; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ─── Background atmosphere ─── */

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at top, rgba(0,0,0,0.9) 0%, transparent 70%);
  z-index: -2;
}

.aurora {
  position: fixed;
  inset: -10vmax;
  pointer-events: none;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.55;
}

.aurora-blob {
  position: absolute;
  width: 50vmax;
  height: 50vmax;
  border-radius: 50%;
  mix-blend-mode: screen;
  animation: drift 28s ease-in-out infinite;
}
.blob-a { background: #22d3ee; top: -20vmax; left: -10vmax; }
.blob-b { background: #a855f7; top: 10vmax; right: -15vmax; animation-delay: -8s; animation-duration: 36s; }
.blob-c { background: #f472b6; bottom: -25vmax; left: 30vmax; animation-delay: -16s; animation-duration: 40s; }

@keyframes drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  33% { transform: translate3d(8vmax, -6vmax, 0) scale(1.1); }
  66% { transform: translate3d(-6vmax, 4vmax, 0) scale(0.9); }
}

@media (prefers-reduced-motion: reduce) {
  .aurora-blob, .brand-mark-pulse, .caret { animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ─── Typography ─── */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

h1 { font-size: clamp(2.4rem, 5.2vw, 4.4rem); line-height: 1.05; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); line-height: 1.15; }
h3 { font-size: 1.15rem; line-height: 1.3; }

p { margin: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.eyebrow-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-good);
  box-shadow: 0 0 12px var(--accent-good);
}

.gradient-text {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ─── Nav ─── */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.9rem clamp(1rem, 4vw, 2rem);
  background: rgba(7, 7, 15, 0.65);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark {
  position: relative;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--grad-hero);
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 6px 30px rgba(168, 85, 247, 0.35);
}
.brand-mark::before {
  content: "M";
  font-family: var(--font-display);
  font-weight: 700;
  color: #0a0a14;
  font-size: 1.05rem;
}
.brand-mark-pulse {
  position: absolute;
  inset: -3px;
  border-radius: 12px;
  border: 1px solid rgba(244, 114, 182, 0.6);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.9; }
  100% { transform: scale(1.4); opacity: 0; }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
}
.brand-dot {
  color: var(--accent-3);
  margin: 0 0.1em;
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--text-dim);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--grad-hero);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(168, 85, 247, 0.15));
  border: 1px solid rgba(168, 85, 247, 0.4);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.nav-cta:hover {
  transform: translateY(-1px);
  border-color: var(--accent-3);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.25), rgba(244, 114, 182, 0.25));
}
.nav-cta-arrow { transition: transform 0.2s ease; }
.nav-cta:hover .nav-cta-arrow { transform: translateX(2px); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  width: 38px; height: 38px;
  padding: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}
.nav-toggle-bar {
  width: 16px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
}

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(13, 13, 26, 0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1rem 1rem;
    margin-left: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }
  .nav.open .nav-links {
    max-height: 520px;
  }
}

/* ─── Buttons ─── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-hero);
  color: #08080f;
  box-shadow: 0 10px 30px -10px rgba(168, 85, 247, 0.55);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 40px -10px rgba(244, 114, 182, 0.65);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line-strong);
  color: var(--text);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-2);
}

/* ─── Hero ─── */

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 2rem) clamp(3rem, 6vw, 5rem);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; }
}

.hero-title {
  margin: 0.6rem 0 1.5rem;
}

.hero-sub {
  font-size: 1.12rem;
  color: var(--text-dim);
  max-width: 56ch;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  list-style: none;
  padding: 0;
  margin: 0;
}
.hero-meta li {
  background: rgba(13, 13, 26, 0.6);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.meta-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.meta-value {
  font-weight: 600;
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .hero-meta { grid-template-columns: repeat(2, 1fr); }
}

/* Console */

.hero-console {
  background: rgba(10, 10, 22, 0.85);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  overflow: hidden;
  box-shadow: 0 30px 70px -30px rgba(34, 211, 238, 0.35), 0 0 0 1px rgba(168, 85, 247, 0.15) inset;
}

.console-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}
.console-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.console-title {
  margin-left: 0.5rem;
  color: var(--text-mute);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

.console-body {
  padding: 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.console-body .c-key { color: var(--accent); }
.console-body .c-arg { color: var(--accent-3); }
.console-body .c-ok { color: var(--accent-good); margin-right: 0.4rem; }
.console-body .c-link { color: var(--accent-warm); text-decoration: underline dotted; }
.console-body .c-dim { color: var(--text-mute); }

.caret {
  display: inline-block;
  width: 8px; height: 1em;
  vertical-align: -0.15em;
  margin-left: 0.4rem;
  background: var(--accent);
  animation: blink 1s steps(2) infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}

/* ─── Trust strip ─── */

.trust {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem) 4rem;
}
.trust ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.trust li {
  background: var(--surface);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  backdrop-filter: blur(10px);
}
.trust-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.trust h3 { font-size: 1.05rem; }
.trust p { color: var(--text-dim); font-size: 0.92rem; line-height: 1.5; }

@media (max-width: 920px) {
  .trust ul { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .trust ul { grid-template-columns: 1fr; }
}

/* ─── Section base ─── */

.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) clamp(1rem, 4vw, 2rem);
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.section-head h2 { margin-bottom: 0.8rem; }
.section-sub {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 60ch;
}

/* ─── About ─── */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.about-lede {
  font-size: 1.1rem;
  color: var(--text-dim);
  line-height: 1.65;
}
.about-pillars {
  grid-column: 1 / -1;
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.about-pillars li {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  background: var(--surface);
  backdrop-filter: blur(10px);
  position: relative;
}
.about-pillars li::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-soft);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.35;
}
.pillar-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.about-pillars p { color: var(--text-dim); font-size: 0.95rem; }

@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-pillars { grid-template-columns: 1fr; }
}

/* ─── Tracks ─── */

.track-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.track-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.7rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}
.track-card:hover {
  transform: translateY(-3px);
  border-color: rgba(168, 85, 247, 0.4);
  box-shadow: 0 30px 60px -30px rgba(34, 211, 238, 0.25);
}
.track-card::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 240px; height: 240px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.18), transparent 70%);
  pointer-events: none;
  transform: translate(40%, -40%);
}
.track-card header {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}
.track-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}
.track-card h3 { font-size: 1.4rem; }
.track-card p { color: var(--text-dim); }
.track-card ul {
  list-style: none;
  margin: auto 0 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.track-card li {
  position: relative;
  padding-left: 1.2rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.track-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-3);
  font-family: var(--font-mono);
}

@media (max-width: 720px) {
  .track-grid { grid-template-columns: 1fr; }
}

/* ─── Format ─── */

.format-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.format-steps li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
  position: relative;
}
.format-steps li:first-child { border-top: 0; padding-top: 0; }
.step-rail {
  position: relative;
  display: flex;
  justify-content: center;
}
.step-rail::after {
  content: "";
  position: absolute;
  top: 36px; bottom: -1.6rem;
  left: 50%;
  width: 1px;
  background: linear-gradient(var(--accent-2), transparent);
  transform: translateX(-50%);
  opacity: 0.5;
}
.format-steps li:last-child .step-rail::after { display: none; }
.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  color: #08080f;
  background: var(--grad-hero);
  width: 36px; height: 36px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-weight: 700;
}
.step-body h3 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.step-body p { color: var(--text-dim); }

/* ─── Timeline ─── */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.timeline li {
  background: var(--surface);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  backdrop-filter: blur(10px);
  position: relative;
}
.phase {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.timeline h3 { font-size: 1.1rem; }
.timeline p { color: var(--text-dim); font-size: 0.92rem; flex: 1; }
.phase-when {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent-warm);
  border-top: 1px dashed var(--line);
  padding-top: 0.7rem;
  margin-top: 0.4rem;
}

@media (max-width: 920px) {
  .timeline { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .timeline { grid-template-columns: 1fr; }
}

/* ─── Prizes ─── */

.prize-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1rem;
}
.prize-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  backdrop-filter: blur(10px);
  overflow: hidden;
}
.prize-grand {
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.18), rgba(168, 85, 247, 0.16) 50%, rgba(244, 114, 182, 0.14));
  border-color: rgba(244, 114, 182, 0.35);
}
.prize-grand::before {
  content: "★";
  position: absolute;
  top: 1rem; right: 1.2rem;
  color: var(--accent-warm);
  font-size: 1.3rem;
  filter: drop-shadow(0 0 8px var(--accent-warm));
}
.prize-rank {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.prize-card h3 { font-size: 1.2rem; }
.prize-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.prize-card li {
  color: var(--text-dim);
  font-size: 0.92rem;
  padding-left: 1.1rem;
  position: relative;
}
.prize-card li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--accent-3);
  font-size: 1.3rem;
  line-height: 0.8;
}
.amount-tbd {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-warm);
  border: 1px dashed rgba(251, 191, 36, 0.4);
  padding: 0.05rem 0.4rem;
  border-radius: 4px;
}
.prize-note {
  margin-top: 1.2rem;
  color: var(--text-mute);
  font-size: 0.85rem;
  max-width: 70ch;
}

@media (max-width: 1020px) {
  .prize-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .prize-grid { grid-template-columns: 1fr; }
}

/* ─── Judging ─── */

.judging-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
.rubric {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.rubric article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  backdrop-filter: blur(10px);
}
.rubric header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.4rem;
}
.weight {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}
.rubric p { color: var(--text-dim); font-size: 0.94rem; margin-bottom: 0.7rem; }
.bar {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}
.bar span {
  display: block;
  height: 100%;
  width: var(--fill);
  background: var(--grad-hero);
  border-radius: inherit;
}

.judging-side {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  backdrop-filter: blur(12px);
  position: sticky;
  top: 90px;
}
.judging-side h3 { margin-bottom: 0.8rem; }
.judging-side ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.94rem;
}
.judging-side strong { color: var(--text); }
.side-note {
  color: var(--text-mute);
  font-size: 0.85rem;
  border-top: 1px dashed var(--line);
  padding-top: 0.9rem;
}

@media (max-width: 920px) {
  .judging-grid { grid-template-columns: 1fr; }
  .judging-side { position: static; }
}

/* ─── Rules ─── */

.rules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.rules-grid article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  backdrop-filter: blur(10px);
}
.rules-grid h3 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
}
.rules-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.rules-grid li {
  color: var(--text-dim);
  font-size: 0.92rem;
  padding-left: 1.2rem;
  position: relative;
}
.rules-grid li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-good);
  font-size: 0.85rem;
  top: 0.15em;
}
.rules-grid article:nth-child(3) li::before {
  content: "✗";
  color: var(--accent-3);
}

@media (max-width: 720px) {
  .rules-grid { grid-template-columns: 1fr; }
}

/* ─── Committee ─── */

.committee-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.committee-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  text-align: center;
  backdrop-filter: blur(10px);
}
.avatar {
  width: 64px; height: 64px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(34, 211, 238, 0.5), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(244, 114, 182, 0.5), transparent 60%),
    rgba(168, 85, 247, 0.25);
  margin: 0 auto 0.9rem;
  border: 1px dashed var(--line-strong);
}
.committee-card h3 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.3rem;
}
.committee-card p {
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (max-width: 920px) {
  .committee-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ─── Partners ─── */

.partners-card {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.partners-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.4), transparent 30%, rgba(244, 114, 182, 0.4) 80%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.partners-card h2 { margin: 0.6rem 0 1rem; }
.partner-tiers {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.partner-tiers li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0.8rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.tier {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.partner-tiers p { color: var(--text-dim); font-size: 0.92rem; }
.partners-cta {
  background: rgba(7, 7, 15, 0.45);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: flex-start;
}
.partners-cta h3 { font-size: 1.2rem; }
.partners-cta p { color: var(--text-dim); }
.partner-disclaimer {
  font-size: 0.78rem;
  color: var(--text-mute);
}

@media (max-width: 820px) {
  .partners-card { grid-template-columns: 1fr; }
}

/* ─── FAQ ─── */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.faq-list details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
  backdrop-filter: blur(10px);
  transition: border-color 0.2s ease;
}
.faq-list details[open] {
  border-color: rgba(168, 85, 247, 0.4);
  background: var(--surface-strong);
}
.faq-list summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--text);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list p {
  color: var(--text-dim);
  margin-top: 0.7rem;
  line-height: 1.6;
}

/* ─── Register ─── */

.section-register {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}
.register-card {
  position: relative;
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.1), rgba(168, 85, 247, 0.12) 50%, rgba(244, 114, 182, 0.1));
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  backdrop-filter: blur(14px);
  overflow: hidden;
}
.register-card::before {
  content: "";
  position: absolute;
  top: -120px; right: -120px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(244, 114, 182, 0.35), transparent 70%);
  pointer-events: none;
}
.register-card h2 { margin: 0.6rem 0 1rem; }
.register-sub { color: var(--text-dim); max-width: 60ch; margin-bottom: 1.8rem; }
.register-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  position: relative;
}
.register-form label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.register-form label.full { grid-column: 1 / -1; }
.register-form input,
.register-form select {
  font-family: var(--font-body);
  font-size: 1rem;
  letter-spacing: normal;
  text-transform: none;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: rgba(7, 7, 15, 0.55);
  color: var(--text);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.register-form input:focus,
.register-form select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(7, 7, 15, 0.8);
}
.register-form button {
  grid-column: 1 / -1;
  justify-self: start;
  margin-top: 0.4rem;
}
.form-note {
  grid-column: 1 / -1;
  color: var(--accent-good);
  font-size: 0.92rem;
  min-height: 1.2em;
}
.register-fineprint {
  margin-top: 1.5rem;
  color: var(--text-mute);
  font-size: 0.82rem;
}

@media (max-width: 720px) {
  .register-form { grid-template-columns: 1fr; }
}

/* ─── Footer ─── */

.footer {
  border-top: 1px solid var(--line);
  background: rgba(7, 7, 15, 0.7);
  backdrop-filter: blur(10px);
  margin-top: 2rem;
}
.footer-top {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem clamp(1rem, 4vw, 2rem) 2rem;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 2rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.footer-brand .brand-name { font-size: 1.15rem; }
.footer-tag { color: var(--text-mute); font-size: 0.9rem; margin-top: 4px; }
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.footer-nav h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 0.8rem;
}
.footer-nav a {
  display: block;
  color: var(--text-dim);
  font-size: 0.92rem;
  padding: 0.25rem 0;
  transition: color 0.2s ease;
}
.footer-nav a:hover { color: var(--text); }

.footer-bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.2rem clamp(1rem, 4vw, 2rem) 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid var(--line);
  color: var(--text-mute);
  font-size: 0.85rem;
}
.footer-policy { display: flex; gap: 0.8rem; align-items: center; }
.footer-policy a:hover { color: var(--text); }

@media (max-width: 820px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 520px) {
  .footer-nav { grid-template-columns: 1fr 1fr; }
}

/* ─── Reveal animation ─── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}