/* ══════════════════════════════════════════════════════════════
   HACK2SKILL — style.css
   ══════════════════════════════════════════════════════════════ */

/* ── Design Tokens ───────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg:          #0d0b18;
  --bg-alt:      #120f22;
  --bg-card:     #1a1530;
  --bg-card-alt: #0f0d1c;

  /* Brand */
  --purple:      #7c3aed;
  --purple-l:    #a855f7;
  --purple-d:    #4c1d95;
  --purple-glow: rgba(124, 58, 237, 0.35);

  /* Text */
  --white:       #ffffff;
  --gray:        #9ca3af;
  --gray-d:      #4b5563;

  /* Borders */
  --border:      rgba(124, 58, 237, 0.3);
  --border-l:    rgba(255, 255, 255, 0.08);

  /* Typography */
  --ff-sans:  'Inter', system-ui, sans-serif;
  --ff-head:  'Space Grotesk', system-ui, sans-serif;
  --ff-mono:  'JetBrains Mono', monospace;

  /* Layout */
  --nav-h:        72px;
  --section-px:   clamp(1.25rem, 5vw, 5rem);
  --max-w:        1200px;

  /* Motion */
  --ease-expo:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --dur-fast:     200ms;
  --dur-med:      400ms;
  --dur-slow:     700ms;
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--ff-sans);
  background: var(--bg);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
svg { stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.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;
}

/* ── Custom Cursor ───────────────────────────────────────────── */
#cursor-dot,
#cursor-ring {
  position: fixed;
  top: 0; left: 0;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity var(--dur-fast) ease;
}
#cursor-dot {
  width: 6px; height: 6px;
  background: var(--purple-l);
}
#cursor-ring {
  width: 32px; height: 32px;
  border: 1.5px solid var(--purple-l);
  transition: width var(--dur-fast) var(--ease-expo),
              height var(--dur-fast) var(--ease-expo),
              border-color var(--dur-fast) ease;
}
#cursor-ring.cursor-hover {
  width: 52px; height: 52px;
  border-color: var(--purple);
}
@media (pointer: coarse) {
  #cursor-dot, #cursor-ring { display: none; }
  body { cursor: auto; }
}

/* ── Scroll Reveal ───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-expo),
              transform var(--dur-slow) var(--ease-expo);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Shared Buttons ──────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  background: var(--purple);
  color: var(--white);
  font-family: var(--ff-head);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .03em;
  border-radius: 999px;
  transition: background var(--dur-fast) ease,
              transform var(--dur-fast) ease,
              box-shadow var(--dur-fast) ease;
}
.btn-primary:hover {
  background: var(--purple-l);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--purple-glow);
}
.btn-primary.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1rem;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border: 1.5px solid var(--border);
  color: var(--white);
  font-family: var(--ff-head);
  font-weight: 600;
  font-size: .9rem;
  border-radius: 999px;
  transition: border-color var(--dur-fast) ease,
              background var(--dur-fast) ease,
              transform var(--dur-fast) ease;
}
.btn-outline:hover {
  background: rgba(124, 58, 237, 0.15);
  border-color: var(--purple-l);
  transform: translateY(-2px);
}

/* ── Section Helpers ─────────────────────────────────────────── */
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) var(--section-px);
  text-align: center;
}
.section-alt { background: var(--bg-alt); }

.section-tag {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .25em;
  color: var(--purple-l);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-heading {
  font-family: var(--ff-head);
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  margin-bottom: 1.5rem;
}

.section-desc {
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--gray);
  line-height: 1.75;
}

/* ════════════════════════════════════════════════════════════════
   NAVBAR
════════════════════════════════════════════════════════════════ */
#site-header {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: min(var(--max-w), 95%);
}

#navbar {
  position: relative;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 999px;
  padding: .75rem 1.5rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
  transition: box-shadow var(--dur-med) ease;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: #1a0a3a;
  font-family: var(--ff-head);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -.02em;
  flex-shrink: 0;
}
.nav-logo svg { color: var(--purple); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
.nav-links a {
  font-size: .85rem;
  font-weight: 600;
  color: #2d1b5a;
  letter-spacing: .01em;
  transition: color var(--dur-fast) ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--purple);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

.btn-register {
  padding: .55rem 1.25rem;
  background: var(--purple);
  color: var(--white);
  font-family: var(--ff-head);
  font-weight: 700;
  font-size: .82rem;
  border-radius: 999px;
  transition: background var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.btn-register:hover {
  background: var(--purple-l);
  transform: translateY(-1px);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 26px;
  padding: 2px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  height: 2px;
  background: #2d1b5a;
  border-radius: 2px;
  transition: transform var(--dur-fast) ease, opacity var(--dur-fast) ease;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav dropdown */
#mobile-nav {
  display: none;
  margin-top: .5rem;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 1.5rem;
  padding: 1rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
#mobile-nav.open { display: block; }
#mobile-nav ul { display: flex; flex-direction: column; gap: .25rem; }
#mobile-nav a {
  display: block;
  padding: .65rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  color: #2d1b5a;
  border-radius: .75rem;
  transition: background var(--dur-fast) ease;
}
#mobile-nav a:hover { background: rgba(124, 58, 237, 0.08); color: var(--purple); }
#mobile-nav .mob-register {
  margin-top: .5rem;
  color: var(--white);
  background: var(--purple);
  text-align: center;
  border-radius: 999px;
}
#mobile-nav .mob-register:hover { background: var(--purple-l); }

/* ════════════════════════════════════════════════════════════════
   HERO
════════════════════════════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  background: radial-gradient(ellipse at 65% 50%, #3b1a7a 0%, #0d0b18 65%);
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}

/* Purple waves – right side background */
.hero-waves {
  position: absolute;
  top: 0; right: 0;
  width: 65%;
  height: 100%;
  pointer-events: none;
}
.hero-waves img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .55;
  animation: waveFloat 8s ease-in-out infinite;
}
.hero-waves-fade {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, #0d0b18 0%, transparent 40%, transparent 80%, #0d0b18 100%);
}

@keyframes waveFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%       { transform: translateY(-20px) rotate(1.5deg); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem var(--section-px) 4rem;
}

/* Figure column */
.hero-figure-col {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-figure-glow {
  position: absolute;
  inset: -3rem;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.28);
  filter: blur(60px);
  animation: heroGlow 4s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes heroGlow {
  from { opacity: .6; transform: scale(.95); }
  to   { opacity: 1;  transform: scale(1.05); }
}

.hero-figure {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  margin: 0 auto;
  transition: transform .7s var(--ease-expo);
}
.hero-figure:hover { transform: scale(1.03); }
.hero-figure img {
  width: 100%; height: auto;
  border-radius: 1rem;
  object-fit: cover;
  filter: drop-shadow(0 24px 48px rgba(124, 58, 237, 0.4));
}

.hero-subtitle {
  margin-top: 1.25rem;
  font-family: var(--ff-mono);
  font-size: .65rem;
  letter-spacing: .3em;
  color: rgba(255,255,255,0.55);
  text-align: center;
}

/* Copy column */
.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-heading {
  font-family: var(--ff-head);
  font-size: clamp(3.5rem, 8vw, 7.5rem);
  font-weight: 900;
  line-height: .92;
  letter-spacing: -.04em;
  margin-bottom: 1.5rem;
}

.hero-future {
  display: block;
  background: linear-gradient(135deg, var(--purple-l) 0%, #fff 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  -webkit-text-stroke: 1px rgba(168, 85, 247, 0.3);
}

.hero-desc {
  max-width: 420px;
  color: rgba(255,255,255,0.65);
  font-size: .95rem;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-cta {
  font-size: 1rem;
  padding: .9rem 2rem;
}

/* ════════════════════════════════════════════════════════════════
   WHO CAN PARTICIPATE
════════════════════════════════════════════════════════════════ */
#about {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.participant-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 3rem auto 1.5rem;
  max-width: 900px;
  text-align: left;
}

.participant-card {
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 2.5rem 2rem;
  cursor: pointer;
  transition: background var(--dur-med) var(--ease-expo),
              transform var(--dur-med) var(--ease-expo),
              box-shadow var(--dur-med) ease;
}
.participant-card p {
  font-family: var(--ff-head);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.5;
}
.participant-card:hover,
.participant-card:focus-visible {
  background: rgba(124, 58, 237, 0.22);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(124, 58, 237, 0.25);
  outline: none;
}
.participant-card:focus-visible {
  outline: 2px solid var(--purple-l);
  outline-offset: 3px;
}

.participant-note {
  font-size: .82rem;
  color: var(--gray-d);
  margin-top: .5rem;
}

/* ════════════════════════════════════════════════════════════════
   WHAT IS THE HACKATHON
════════════════════════════════════════════════════════════════ */
.what-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) var(--section-px);
  text-align: left;
}

.what-text .section-heading { margin-bottom: 1.25rem; }
.what-text .section-desc    { margin: 0 0 1rem; }
.what-text .section-desc:last-of-type { margin-bottom: 0; }

/* Countdown */
.countdown-block {
  margin-top: 2rem;
  padding: 1.5rem;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid var(--border);
  border-radius: 1rem;
}
.countdown-label {
  font-size: .75rem;
  font-family: var(--ff-mono);
  letter-spacing: .12em;
  color: var(--gray);
  margin-bottom: .75rem;
}
.countdown-row {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.cd-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cd-num {
  font-family: var(--ff-mono);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--purple-l);
  line-height: 1;
}
.cd-lbl {
  font-size: .6rem;
  letter-spacing: .1em;
  color: var(--gray-d);
  margin-top: .2rem;
  text-transform: uppercase;
}
.cd-sep {
  font-size: 1.75rem;
  color: var(--gray-d);
  line-height: 1;
  padding-bottom: .6rem;
}

.what-ctas {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}

/* Gallery 2×2 grid */
.what-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}

.gal-item {
  border-radius: 1rem;
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
  perspective: 800px;
}

.gal-inner {
  position: relative;
  width: 100%; height: 100%;
  border-radius: inherit;
  overflow: hidden;
  transition: transform .3s var(--ease-expo);
  transform-style: preserve-3d;
}

.gal-img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s var(--ease-expo), filter .4s ease;
}
.gal-item:hover .gal-img,
.gal-item:focus-within .gal-img {
  transform: scale(1.1);
  filter: brightness(.75);
}

.gal-overlay {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}
.gal-item:hover .gal-overlay,
.gal-item:focus-within .gal-overlay {
  opacity: 1;
}

/* Radial shimmer on hover (from reference) */
.gal-shine {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(168,85,247,.3), transparent 60%);
  border-radius: inherit;
}

/* Crosshair corner markers */
.ch {
  position: absolute;
  width: 16px; height: 16px;
  border-color: rgba(255,255,255,0.8);
  border-style: solid;
  transition: transform .3s var(--ease-expo);
}
.ch.tl { top: 10px; left: 10px;   border-width: 2px 0 0 2px; transform: translate(-6px,-6px); }
.ch.tr { top: 10px; right: 10px;  border-width: 2px 2px 0 0; transform: translate(6px,-6px); }
.ch.bl { bottom: 10px; left: 10px;  border-width: 0 0 2px 2px; transform: translate(-6px,6px); }
.ch.br { bottom: 10px; right: 10px; border-width: 0 2px 2px 0; transform: translate(6px,6px); }
.gal-item:hover .ch.tl { transform: translate(0,0); }
.gal-item:hover .ch.tr { transform: translate(0,0); }
.gal-item:hover .ch.bl { transform: translate(0,0); }
.gal-item:hover .ch.br { transform: translate(0,0); }

/* ════════════════════════════════════════════════════════════════
   WHY PARTICIPATE  ← Requirement 1: Astronaut rings
════════════════════════════════════════════════════════════════ */
#why { overflow: hidden; }

.why-grid {
  display: grid;
  grid-template-columns: 1fr 340px 1fr;
  gap: 2.5rem;
  align-items: center;
  margin-top: 3rem;
  text-align: left;
}

.why-cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.why-right { text-align: left; }

.benefit-card {
  border-radius: 1.25rem;
  padding: 1.75rem;
  cursor: pointer;
  transition: transform var(--dur-med) var(--ease-expo),
              filter var(--dur-med) ease;
}
.benefit-card--purple { background: var(--purple); }
.benefit-card--dark   { background: var(--bg-card); border: 1px solid var(--border-l); }
.benefit-card:hover { transform: translateY(-4px); filter: brightness(1.08); }
.benefit-card:focus-visible { outline: 2px solid var(--purple-l); outline-offset: 3px; }
.benefit-card h3 { font-family: var(--ff-head); font-weight: 700; margin-bottom: .5rem; }
.benefit-card p  { font-size: .88rem; color: rgba(255,255,255,.85); line-height: 1.6; }

/* — Centre column — */
.why-center {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 460px;
}

/* Rings wrap sits absolutely, centred */
.astro-rings-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* Pulsing outward rings — Requirement 1 */
.astro-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(124, 58, 237, 0.5);
  animation: ringPulse 4s ease-out infinite;
}
.astro-ring-1 { width: 160px; height: 160px; animation-delay: 0s; }
.astro-ring-2 { width: 240px; height: 240px; animation-delay: .7s; }
.astro-ring-3 { width: 320px; height: 320px; animation-delay: 1.4s; }
.astro-ring-4 { width: 400px; height: 400px; animation-delay: 2.1s; }

@keyframes ringPulse {
  0%   { transform: scale(.55); opacity: .85; }
  100% { transform: scale(1.45); opacity: 0; }
}

/* Orbiting dots */
.orbit {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.orbit-dot {
  position: absolute;
  border-radius: 50%;
  box-shadow: 0 0 12px currentColor;
}
.orbit-dot--lg { width: 12px; height: 12px; background: var(--purple-l); color: var(--purple-l); }
.orbit-dot--md { width: 8px;  height: 8px;  background: var(--white); color: var(--white); opacity: .8; }
.orbit-dot--sm { width: 6px;  height: 6px;  background: var(--purple-l); color: var(--purple-l); opacity: .7; }

.orbit-1 { width: 420px; height: 420px; animation: spinCW 20s linear infinite; }
.orbit-1 .orbit-dot { top: 0; left: 50%; transform: translateX(-50%); }

.orbit-2 { width: 300px; height: 300px; animation: spinCCW 14s linear infinite; }
.orbit-2 .orbit-dot { bottom: 0; left: 50%; transform: translateX(-50%); }

.orbit-3 { width: 360px; height: 360px; animation: spinCW 17s linear infinite; }
.orbit-3 .orbit-dot { top: 50%; right: 0; transform: translateY(-50%); }

@keyframes spinCW  { to { transform: rotate(360deg); } }
@keyframes spinCCW { to { transform: rotate(-360deg); } }

/* Glow blob */
.astro-glow {
  position: absolute;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(124, 58, 237, .3);
  filter: blur(50px);
  animation: glowPulse 3s ease-in-out infinite alternate;
}
@keyframes glowPulse {
  from { transform: scale(.9); opacity: .7; }
  to   { transform: scale(1.1); opacity: 1; }
}

/* Twinkling stars */
.star {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--white);
  animation: twinkle 3s ease-in-out infinite;
}
.s1  { top: 12%; left: 18%; animation-delay: 0s; }
.s2  { top: 30%; left: 8%;  animation-delay: .4s; width: 3px; height: 3px; }
.s3  { top: 60%; left: 12%; animation-delay: .8s; }
.s4  { top: 80%; left: 25%; animation-delay: 1.2s; width: 3px; height: 3px; }
.s5  { top: 10%; right: 15%; animation-delay: .2s; }
.s6  { top: 45%; right: 8%;  animation-delay: .6s; width: 3px; height: 3px; }
.s7  { top: 70%; right: 18%; animation-delay: 1s; }
.s8  { top: 88%; right: 30%; animation-delay: 1.5s; width: 3px; height: 3px; }

@keyframes twinkle {
  0%, 100% { opacity: .15; transform: scale(.8); }
  50%       { opacity: 1;   transform: scale(1.5); }
}

/* Astronaut figure */
.astro-figure {
  position: relative;
  z-index: 10;
  width: 90%;
  max-width: 300px;
}
.astro-img {
  width: 100%; height: auto;
  animation: astroFloat 6s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(168, 85, 247, .45));
}
@keyframes astroFloat {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50%       { transform: translateY(-18px) rotate(2deg); }
}

/* ════════════════════════════════════════════════════════════════
   HOW TO PARTICIPATE
════════════════════════════════════════════════════════════════ */
.steps-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: default;
}
.step-icon {
  width: 72px; height: 72px;
  border-radius: 1.25rem;
  background: var(--purple);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  margin-bottom: 1rem;
  transition: background var(--dur-fast) ease, transform var(--dur-fast) var(--ease-expo);
}
.step:hover .step-icon {
  background: var(--purple-l);
  transform: scale(1.1);
}
.step-num {
  font-family: var(--ff-mono);
  font-size: .7rem;
  color: var(--purple-l);
  letter-spacing: .1em;
  margin-bottom: .5rem;
}
.step h3 {
  font-family: var(--ff-head);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: .5rem;
}
.step p {
  font-size: .8rem;
  color: var(--gray);
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════════════════
   CHALLENGES
════════════════════════════════════════════════════════════════ */
.challenges-list {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border-l);
  text-align: left;
}

.challenge-item {
  display: grid;
  grid-template-columns: 60px 120px 1fr 28px;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem .75rem;
  border-bottom: 1px solid var(--border-l);
  transition: background var(--dur-fast) ease;
  cursor: pointer;
}
.challenge-item:hover { background: rgba(124, 58, 237, .08); }
.challenge-item:focus-visible { outline: 2px solid var(--purple-l); outline-offset: -2px; }

.ch-num {
  font-family: var(--ff-mono);
  font-size: 1.05rem;
  color: var(--gray-d);
}

.ch-thumb {
  border-radius: .75rem;
  overflow: hidden;
  height: 56px;
}
.ch-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease-expo);
}
.challenge-item:hover .ch-thumb img { transform: scale(1.12); }

.ch-desc {
  font-size: .88rem;
  color: rgba(255,255,255,.75);
  line-height: 1.6;
}

.ch-arrow {
  color: var(--gray-d);
  flex-shrink: 0;
  transition: color var(--dur-fast) ease, transform var(--dur-fast) ease;
  stroke: currentColor;
  fill: none;
}
.challenge-item:hover .ch-arrow {
  color: var(--purple-l);
  transform: translate(3px, -3px);
}

/* ════════════════════════════════════════════════════════════════
   SCHEDULE — Requirement 2: Interactive slider
════════════════════════════════════════════════════════════════ */
.sl-wrap {
  margin: 3rem 0 0;
  padding: 0 1rem;
}

.sl-track {
  position: relative;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.sl-track:active { cursor: grabbing; }
.sl-track:focus-visible {
  outline: 2px solid var(--purple-l);
  outline-offset: 6px;
}

.sl-fill {
  position: absolute;
  inset-block: 0;
  left: 0;
  background: linear-gradient(90deg, var(--purple), var(--purple-l));
  border-radius: 999px;
  transition: width .3s var(--ease-expo);
  pointer-events: none;
}

.sl-stop {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,.35);
  border: none;
  cursor: pointer;
  transition: background var(--dur-fast) ease, transform var(--dur-fast) ease;
  z-index: 2;
}
.sl-stop:hover { background: var(--purple-l); transform: translate(-50%,-50%) scale(1.35); }
.sl-stop.active { background: var(--purple-l); }
.sl-stop:focus-visible { outline: 2px solid var(--purple-l); outline-offset: 3px; }

.sl-thumb {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 0 3px var(--purple), 0 0 20px var(--purple-glow);
  transition: left .3s var(--ease-expo), box-shadow var(--dur-fast) ease;
  pointer-events: none;
  z-index: 3;
}
.sl-track:active .sl-thumb {
  box-shadow: 0 0 0 4px var(--purple-l), 0 0 30px rgba(168, 85, 247, .5);
}

/* Milestone cards */
.tl-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .75rem;
  margin-top: 2rem;
}

.tl-item {
  text-align: left;
  padding: .85rem 1rem;
  border-radius: .85rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.tl-item:hover { background: rgba(255,255,255,.05); }
.tl-item.active {
  background: rgba(124, 58, 237, .2);
  border-color: var(--purple-l);
}
.tl-item:focus-visible { outline: 2px solid var(--purple-l); outline-offset: 2px; }

.tl-date {
  display: block;
  font-family: var(--ff-mono);
  font-size: .7rem;
  color: var(--gray-d);
  margin-bottom: .25rem;
}
.tl-item.active .tl-date { color: var(--purple-l); }
.tl-label {
  font-size: .82rem;
  font-weight: 600;
  line-height: 1.3;
}

/* Active milestone headline */
.tl-active-display {
  margin-top: 2.5rem;
  text-align: center;
}
.tl-active-title {
  font-family: var(--ff-head);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  animation: fadeInUp .4s var(--ease-expo);
}
.tl-active-date {
  font-family: var(--ff-mono);
  color: var(--gray);
  margin-top: .5rem;
  font-size: .9rem;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════════════════════════
   REWARDS
════════════════════════════════════════════════════════════════ */
.rewards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
  max-width: 800px;
  margin-inline: auto;
  text-align: left;
}

.reward-card {
  background: rgba(124, 58, 237, .12);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2.5rem 2rem;
  cursor: pointer;
  transition: transform var(--dur-med) var(--ease-expo),
              box-shadow var(--dur-med) ease,
              background var(--dur-med) ease;
}
.reward-card--secondary { background: var(--bg-card); }
.reward-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(124, 58, 237, .3);
  background: rgba(124, 58, 237, .22);
}
.reward-card:focus-visible { outline: 2px solid var(--purple-l); outline-offset: 3px; }

.reward-icon { font-size: 2.5rem; margin-bottom: 1.25rem; }
.reward-card h3 {
  font-family: var(--ff-head);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: .5rem;
}
.reward-tier {
  font-family: var(--ff-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--purple-l);
  margin-bottom: .25rem;
}
.reward-amount {
  font-family: var(--ff-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--purple-l);
  margin-bottom: 1rem;
}
.reward-card p:last-child {
  font-size: .88rem;
  color: var(--gray);
  line-height: 1.65;
}

/* ════════════════════════════════════════════════════════════════
   FAQ
════════════════════════════════════════════════════════════════ */
.faq-list {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  max-width: 720px;
  margin-inline: auto;
  text-align: left;
}

.faq-item {
  border-radius: 1rem;
  border: 1px solid var(--border-l);
  background: rgba(255,255,255,.04);
  overflow: hidden;
}

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  font-family: var(--ff-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--dur-fast) ease;
}
.faq-q:hover { background: rgba(255,255,255,.05); }
.faq-q:focus-visible { outline: 2px solid var(--purple-l); outline-offset: -2px; }

.faq-icon {
  flex-shrink: 0;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--purple-l);
  font-weight: 300;
}

.faq-a {
  padding: 0 1.5rem 1.25rem;
  font-size: .9rem;
  color: var(--gray);
  line-height: 1.7;
  animation: faqOpen .3s var(--ease-expo);
}

@keyframes faqOpen {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════════════════════════
   REGISTER CTA
════════════════════════════════════════════════════════════════ */
#register {
  background: var(--bg);
  text-align: center;
}
.register-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) var(--section-px);
  overflow: hidden;
}
.register-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 700px;
  border-radius: 50%;
  background: rgba(124, 58, 237, .15);
  filter: blur(80px);
  pointer-events: none;
}

/* ════════════════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════════════════ */
#site-footer {
  background: #09081a;
  padding: 3rem var(--section-px);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--ff-head);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--white);
}
.footer-logo svg { color: var(--purple-l); }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}
.footer-links a {
  font-size: .85rem;
  color: var(--gray-d);
  transition: color var(--dur-fast) ease;
}
.footer-links a:hover { color: var(--purple-l); }
.footer-copy {
  font-size: .8rem;
  color: var(--gray-d);
}

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .why-grid { grid-template-columns: 1fr 280px 1fr; gap: 1.5rem; }
  .astro-ring-4 { width: 320px; height: 320px; }
  .astro-ring-3 { width: 260px; height: 260px; }
  .orbit-1 { width: 340px; height: 340px; }
  .orbit-3 { width: 280px; height: 280px; }
}

@media (max-width: 900px) {
  /* Hero: stack vertically */
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; padding-top: 5rem; }
  .hero-waves  { width: 100%; opacity: .3; }
  .hero-copy   { align-items: center; text-align: center; }
  .hero-desc   { max-width: 100%; }
  .hero-figure { max-width: 340px; }

  /* What: stack */
  .what-inner { grid-template-columns: 1fr; gap: 3rem; }
  .what-gallery { max-width: 480px; margin: 0 auto; }

  /* Why: stack */
  .why-grid { grid-template-columns: 1fr; gap: 2rem; }
  .why-left, .why-right { order: 1; }
  .why-center { order: 0; min-height: 380px; }

  /* Steps: 2+3 or 3+2 */
  .steps-row { grid-template-columns: repeat(3, 1fr); }

  /* Challenges: remove thumbnail column */
  .challenge-item { grid-template-columns: 48px 1fr 24px; }
  .ch-thumb { display: none; }

  /* Timeline cards: 2+3 */
  .tl-cards { grid-template-columns: repeat(3, 1fr); }

  /* Rewards: stack */
  .rewards-grid { grid-template-columns: 1fr; }

  /* Nav */
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

@media (max-width: 600px) {
  .hero-heading { font-size: clamp(3rem, 14vw, 5rem); }
  .section-heading { font-size: clamp(2rem, 10vw, 3rem); }

  .participant-grid { grid-template-columns: 1fr; }

  .what-gallery { grid-template-columns: 1fr; max-width: 280px; }

  .steps-row { grid-template-columns: repeat(2, 1fr); }
  .steps-row li:last-child { grid-column: 1 / -1; }

  .tl-cards { grid-template-columns: repeat(2, 1fr); }
  .tl-cards .tl-item:last-child { grid-column: 1 / -1; }

  .countdown-row { gap: .5rem; }
  .cd-num { font-size: 1.35rem; }
}

/* ── Retina / HiDPI ──────────────────────────────────────────── */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .sl-track { height: 5px; }
  .astro-ring { border-width: 1px; }
}

/* ── Reduced Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}