/* ═══════════════════════════════════════════════════════════
   Project Vertex 2026 — Visual System
   Light Ash Corporate · Inter · Deep Navy Accent · Mobile-First
═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── TOKENS ─────────────────────────────────────────── */
:root {
  /* Light ash palette — premium paper/stone */
  --bg:        #EDECE8;
  --bg-alt:    #E6E4DF;
  --bg-card:   #F4F3F0;
  --bg-white:  #FAFAF8;
  --border:    rgba(26, 26, 26, 0.09);
  --border-md: rgba(26, 26, 26, 0.16);

  /* Accent — deep navy */
  --accent:    #1e3a8a;
  --accent-h:  #1e40af;
  --accent-bg: rgba(30, 58, 138, 0.1);
  --accent-br: rgba(30, 58, 138, 0.25);

  /* Navy highlight */
  --amber:     #1e3a8a;
  --amber-bg:  rgba(30, 58, 138, 0.08);

  /* Text */
  --t1: #1A1A1A;
  --t2: #4A4A4A;
  --t3: #8A8A8A;
  --t4: #ABABAB;

  /* Status */
  --green:     #1A7A40;
  --green-bg:  rgba(26, 122, 64, 0.08);

  /* Type */
  --sans: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --r:  2px;
  --r2: 5px;
  --r3: 8px;
  --r4: 14px;
}

/* ── RESET ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 60px; font-size: 16px; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--t1);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
ul, ol { list-style: none; }
.hidden { display: none !important; }

/* ── CANVAS ─────────── */
#c { display: block; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1; pointer-events: none; }
/* Fallback gradient if WebGL fails */
.no-webgl #c { display: none; }
body.no-webgl { background: linear-gradient(135deg, #EDECE8 0%, #F0EFEB 100%); }

/* ── LAYOUT ─────────────────────────────────────────── */
.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
@media (min-width: 640px) { .container { padding: 0 2.5rem; } }

/* ── SCROLL REVEAL ──────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1);
}
.reveal.in { opacity: 1; transform: none; }
[data-delay="1"] { transition-delay: .08s; }
[data-delay="2"] { transition-delay: .16s; }
[data-delay="3"] { transition-delay: .24s; }

/* ── SECTION LABEL ──────────────────────────────────── */
.section__label {
  display: inline-block;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  border-left: 2px solid var(--accent);
  padding-left: .6rem;
}

/* ── SECTION ────────────────────────────────────────── */
.section { position: relative; z-index: 1; padding: 5rem 0; }
.section--alt { background: transparent; }
.no-webgl .section--alt { background: #E8E7E2; }
.section--white { background: transparent; }
@media (min-width: 768px) { .section { padding: 7rem 0; } }

.section__head { margin-bottom: 3rem; }
.section__head h2 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -.05em;
  line-height: 1.05;
  color: var(--t1);
  margin-bottom: .85rem;
}
.section__desc { font-size: .95rem; color: var(--t2); max-width: 520px; line-height: 1.8; }

/* ── BUTTONS ─────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: .875rem;
  padding: 11px 22px; border-radius: var(--r3);
  transition: background .18s, color .18s, border-color .18s, transform .15s, box-shadow .18s;
  cursor: pointer; white-space: nowrap; letter-spacing: -.01em;
}
.btn--primary {
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
  box-shadow: 0 2px 8px rgba(30,58,138,.25), 0 1px 0 rgba(0,0,0,.04);
}
.btn--primary:hover { background: var(--accent-h); border-color: var(--accent-h); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(30,58,138,.35); }
.btn--primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(30,58,138,.3); }
.btn--primary:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn--ghost {
  background: transparent; color: var(--t2); border: 1px solid var(--border-md);
}
.btn--ghost:hover { color: var(--t1); border-color: var(--t3); background: rgba(26,26,26,.04); }
.btn--full { width: 100%; margin-top: 1.25rem; }
.btn--wa { width: 100%; margin-top: .75rem; color: var(--t2) !important; font-size: .85rem !important; }

/* ── PULSE DOT ──────────────────────────────────────── */
.pulse {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--green); margin-right: 7px; vertical-align: middle;
  animation: blink 2.4s ease infinite;
}
@keyframes blink {
  0%, 100% { box-shadow: 0 0 0 0 rgba(26,122,64,.5); }
  50%       { box-shadow: 0 0 0 5px rgba(26,122,64,0); }
}

/* ══════════════════════════════════════════════════════
   NAVIGATION
══════════════════════════════════════════════════════ */
.nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(237, 236, 232, 0.95);
  border-bottom: 1px solid var(--border);
  transition: background .25s, box-shadow .25s;
}
.nav.scrolled { background: rgba(237,236,232,.97); box-shadow: 0 1px 0 var(--border); }
.nav__inner {
  max-width: 1100px; margin: 0 auto; padding: 0 1.5rem;
  height: 58px; display: flex; align-items: center; gap: .5rem;
}
@media (min-width: 640px) { .nav__inner { padding: 0 2.5rem; } }
.nav__brand {
  font-weight: 800; font-size: .95rem; letter-spacing: -.03em;
  color: var(--t1); white-space: nowrap; flex-shrink: 0;
}
.nav__links {
  display: flex; align-items: center; gap: 2px; margin-left: auto;
}
.nav__links a {
  font-size: .82rem; font-weight: 500; color: var(--t2);
  padding: 5px 10px; border-radius: var(--r2);
  transition: color .15s, background .15s;
}
.nav__links a:hover { color: var(--t1); background: rgba(26,26,26,.05); }
.nav__cta {
  color: #fff !important; background: var(--accent) !important;
  padding: 6px 14px !important; border-radius: var(--r2) !important;
  margin-left: .5rem; font-weight: 600 !important;
  box-shadow: 0 1px 4px rgba(196,122,30,.2);
}
.nav__cta:hover { background: var(--accent-h) !important; }
.nav__toggle { display: none; color: var(--t2); padding: 5px; margin-left: auto; }

/* Mobile nav */
@media (max-width: 820px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed; top: 58px; left: 0; right: 0;
    background: rgba(237,236,232,.98); backdrop-filter: blur(18px);
    flex-direction: column; align-items: stretch;
    padding: .5rem 1rem; gap: 2px;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 11px 14px; font-size: .92rem; }
  .nav__cta { margin: .25rem 0 0 0 !important; text-align: center; }
}

/* ══════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════ */
.hero {
  position: relative; min-height: 100svh;
  z-index: 1; overflow: hidden;
  display: flex; flex-direction: column;
  /* transparent — let the 3D canvas show through */
  background: transparent;
}
.hero__inner {
  flex: 1; display: flex; flex-direction: column;
  justify-content: center; padding: 6rem 0 3rem;
  gap: 3rem; position: relative; z-index: 1;
}
@media (min-width: 768px) {
  .hero__inner { flex-direction: row; align-items: center; justify-content: space-between; padding: 7rem 0 4rem; }
}

.hero__content { max-width: 580px; display: flex; flex-direction: column; gap: 1.75rem; }
.hero__overline {
  font-family: var(--mono); font-size: .7rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--green); display: flex; align-items: center;
}
.hero__h1 {
  font-size: clamp(2.8rem, 8.5vw, 5.5rem); font-weight: 800;
  letter-spacing: -.06em; line-height: .98; color: var(--t1);
}
.hero__sub { font-size: clamp(.95rem, 2vw, 1.1rem); color: var(--t2); line-height: 1.78; max-width: 460px; }

/* Quick-facts */
.hero__facts {
  display: flex; flex-wrap: wrap; gap: .5rem .85rem;
  align-items: center; padding-top: .25rem;
}
.hero__facts span {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--t3); font-weight: 500;
}
.hero__facts svg { color: var(--t4); flex-shrink: 0; }
.facts__sep { width: 1px; height: 14px; background: var(--border-md); flex-shrink: 0; }

.hero__actions { display: flex; gap: .85rem; flex-wrap: wrap; }

/* Hero visual */
.hero__visual {
  flex-shrink: 0;
  width: 100%; max-width: 480px;
}
.hero__visual img {
  width: 100%; border-radius: 12px;
  box-shadow: 0 24px 60px rgba(26,26,26,.12), 0 4px 12px rgba(26,26,26,.06);
}

/* Countdown */
.hero__cd-wrap { flex-shrink: 0; display: flex; flex-direction: column; gap: .75rem; }
.hero__cd-label { font-family: var(--mono); font-size: .63rem; letter-spacing: .12em; text-transform: uppercase; color: var(--t3); }
.hero__cd {
  display: flex; align-items: center; gap: .4rem;
  padding: 1.25rem 1.5rem; border: 1px solid var(--border);
  background: #F5F4F0; border-radius: var(--r4);
  box-shadow: 0 1px 4px rgba(26,26,26,.06);
}
.cd-unit { display: flex; flex-direction: column; align-items: center; gap: 3px; min-width: 50px; }
.cd-n {
  font-family: var(--mono); font-size: 1.8rem; font-weight: 500;
  color: var(--t1); line-height: 1; letter-spacing: -.04em;
}
.cd-n.tick { animation: cdf .12s ease; }
@keyframes cdf { 0%,100%{opacity:1}50%{opacity:.3} }
.cd-l { font-family: var(--mono); font-size: .58rem; color: var(--t3); text-transform: uppercase; letter-spacing: .1em; }
.cd-sep { font-family: var(--mono); font-size: 1.4rem; color: var(--t4); line-height: 1; margin-bottom: 14px; }
.hero__cd-sub { font-family: var(--mono); font-size: .78rem; color: var(--t2); }

/* ══════════════════════════════════════════════════════
   STATS BAR
══════════════════════════════════════════════════════ */
.statsbar {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  background: #F5F4F0;
}
.statsbar__inner {
  display: flex; align-items: stretch; justify-content: center;
  flex-wrap: wrap; padding: 0;
}
.statsbar__item {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 1.25rem 2rem; gap: 4px; text-align: center;
  flex: 1; min-width: 110px;
}
.statsbar__n { font-weight: 800; font-size: 1.3rem; letter-spacing: -.05em; color: var(--accent); }
.statsbar__l { font-family: var(--mono); font-size: .6rem; color: var(--t3); text-transform: uppercase; letter-spacing: .1em; }
.statsbar__sep { width: 1px; background: var(--border); align-self: stretch; margin: .75rem 0; }
@media (max-width: 500px) { .statsbar__sep { display: none; } }

/* ══════════════════════════════════════════════════════
   ABOUT
══════════════════════════════════════════════════════ */
.about__grid {
  display: flex; flex-direction: column; gap: 3rem;
}
@media (min-width: 768px) {
  .about__grid { flex-direction: row; gap: 5rem; align-items: flex-start; }
  .about__text { flex: 1.1; }
  .about__card { flex: 0 0 340px; }
}
.about__text { display: flex; flex-direction: column; gap: 1.25rem; }
.about__text p { font-size: .97rem; color: var(--t2); line-height: 1.85; }

.about__visual {
  width: 100%; border-radius: var(--r4);
  overflow: hidden; margin-bottom: 1.5rem;
  box-shadow: 0 8px 24px rgba(26,26,26,.1);
}
.about__visual img { width: 100%; height: auto; }

.about__card {
  background: #F5F4F0; border: 1px solid var(--border);
  border-radius: var(--r4); padding: 1.75rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  box-shadow: 0 2px 8px rgba(26,26,26,.05);
}
.about__card-row {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: .66rem; color: var(--t3);
  text-transform: uppercase; letter-spacing: .12em;
}
.check-list { display: flex; flex-direction: column; gap: .7rem; }
.check-list li {
  display: flex; align-items: flex-start; gap: 9px;
  font-size: .9rem; color: var(--t2); line-height: 1.55;
}
.check-list li svg { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.about__stat-row {
  display: flex; gap: 0; border-top: 1px solid var(--border);
  padding-top: 1.1rem; margin-top: .25rem;
}
.about__stat { flex: 1; text-align: center; }
.about__stat:not(:last-child) { border-right: 1px solid var(--border); }
.about__stat-n { display: block; font-weight: 800; font-size: 1.2rem; letter-spacing: -.05em; color: var(--accent); }
.about__stat-l { display: block; font-family: var(--mono); font-size: .58rem; color: var(--t3); text-transform: uppercase; letter-spacing: .1em; margin-top: 3px; }

/* ══════════════════════════════════════════════════════
   ELIGIBILITY
══════════════════════════════════════════════════════ */
.eligibility__grid {
  display: flex; flex-direction: column; gap: 2.5rem;
}
@media (min-width: 640px) { .eligibility__grid { flex-direction: row; gap: 3.5rem; } }
.elig-col { flex: 1; }
.elig__subtitle {
  font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; color: var(--t3); margin-bottom: 1.1rem;
}
.plain-list { display: flex; flex-direction: column; gap: .6rem; }
.plain-list li {
  font-size: .9rem; color: var(--t2); line-height: 1.55;
  padding-left: 1rem; position: relative;
}
.plain-list li::before {
  content: ''; position: absolute; left: 0; top: .6em;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent);
}

/* ══════════════════════════════════════════════════════
   WHY PARTICIPATE
══════════════════════════════════════════════════════ */
.why__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; border: 1px solid var(--border); border-radius: var(--r4);
  overflow: hidden; background: var(--border);
}
@media (max-width: 540px) { .why__grid { grid-template-columns: 1fr; } }
.why-card {
  background: #F5F4F0; padding: 2rem 1.75rem;
  display: flex; flex-direction: column; gap: .7rem;
  transition: background .18s;
}
.why-card:hover { background: #F9F8F5; }
.why-card__icon { color: var(--accent); margin-bottom: .2rem; }
.why-card h3 { font-size: 1rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.why-card p { font-size: .88rem; color: var(--t2); line-height: 1.75; }

/* ══════════════════════════════════════════════════════
   HOW TO PARTICIPATE (Steps)
══════════════════════════════════════════════════════ */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid; grid-template-columns: 60px 1fr;
  gap: 0; align-items: stretch;
  border-bottom: 1px solid var(--border);
  transition: background .18s;
}
.step:last-child { border-bottom: none; }
.step:hover { background: rgba(26,26,26,.025); }
.step__n {
  font-family: var(--mono); font-size: .7rem; color: var(--accent);
  letter-spacing: .08em; padding: 1.75rem 1.1rem 1.75rem 0;
  display: flex; align-items: flex-start; justify-content: flex-end;
  border-right: 1px solid var(--border);
  font-weight: 500;
}
.step__body { padding: 1.75rem 0 1.75rem 1.75rem; display: flex; flex-direction: column; gap: .45rem; }
.step__body h3 { font-size: .97rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.step__body p { font-size: .88rem; color: var(--t2); line-height: 1.75; }
@media (max-width: 480px) {
  .step { grid-template-columns: 40px 1fr; }
  .step__n { font-size: .62rem; padding-right: .65rem; }
  .step__body { padding-left: 1rem; }
}

/* ══════════════════════════════════════════════════════
   SYLLABUS / CURRICULUM
══════════════════════════════════════════════════════ */
.syllabus {
  display: flex; flex-direction: column; gap: 0;
  border: 1px solid var(--border); border-radius: var(--r4); overflow: hidden;
  background: #F5F4F0;
}
.syllabus__module {
  display: grid; grid-template-columns: 56px 1fr;
  border-bottom: 1px solid var(--border);
  transition: background .18s;
}
.syllabus__module:last-child { border-bottom: none; }
.syllabus__module:hover { background: var(--bg-card); }
.syllabus__num {
  font-family: var(--mono); font-size: .7rem; color: var(--accent);
  padding: 1.85rem .85rem 1.85rem 1.25rem;
  border-right: 1px solid var(--border);
  display: flex; align-items: flex-start; font-weight: 500;
}
.syllabus__content { padding: 1.85rem 2rem; display: flex; flex-direction: column; gap: .7rem; }
.syllabus__content h3 { font-size: 1rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.syllabus__content p { font-size: .88rem; color: var(--t2); line-height: 1.8; }
.syllabus__tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .2rem; }
.syllabus__tags span {
  font-family: var(--mono); font-size: .63rem; color: var(--accent);
  background: var(--accent-bg); border: 1px solid var(--accent-br);
  padding: 3px 9px; border-radius: var(--r2); letter-spacing: .04em;
}
@media (max-width: 480px) {
  .syllabus__module { grid-template-columns: 1fr; }
  .syllabus__num { display: none; }
  .syllabus__content { padding: 1.25rem 1.5rem; }
}

/* ══════════════════════════════════════════════════════
   PROBLEM TRACKS — two-column cards
══════════════════════════════════════════════════════ */
.tracks__grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .tracks__grid { grid-template-columns: 1fr 1fr; } }
.tracks__grid--two { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .tracks__grid--two { grid-template-columns: 1fr 1fr; } }

.track-card {
  background: #F5F4F0; border: 1px solid var(--border);
  border-radius: var(--r4); padding: 2rem;
  display: flex; flex-direction: column; gap: .75rem;
  transition: box-shadow .18s, border-color .18s;
}
.track-card:hover { box-shadow: 0 4px 20px rgba(26,26,26,.08); border-color: var(--border-md); }
.track-card__head { display: flex; flex-direction: column; gap: .35rem; }
.track-card__num {
  font-family: var(--mono); font-size: .68rem; color: var(--accent);
  letter-spacing: .12em; font-weight: 500;
}
.track-card h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: -.03em; line-height: 1.2; color: var(--t1); }
.track-card__brief { font-size: .9rem; color: var(--t2); line-height: 1.65; }
.track-card__more {
  font-size: .85rem; color: var(--t2); line-height: 1.7;
  overflow: hidden; max-height: 0; transition: max-height .35s ease, opacity .3s;
  opacity: 0;
}
.track-card__more.open { max-height: 600px; opacity: 1; }
.track-card__toggle {
  align-self: flex-start; display: inline-flex; align-items: center; gap: 5px;
  font-size: .78rem; font-weight: 600; color: var(--accent);
  padding: 4px 0; transition: opacity .18s;
}
.track-card__toggle:hover { opacity: .7; }
.toggle-close { display: none; }
.track-card__toggle[aria-expanded="true"] .toggle-open { display: none; }
.track-card__toggle[aria-expanded="true"] .toggle-close { display: inline-flex; align-items: center; gap: 5px; }

/* Track groups (category headers + items) */
.track-groups {
  margin-top: 1.5rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  border-top: 1px solid var(--border); padding-top: 1.5rem;
}
.track-group h4 {
  font-size: .78rem; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: .08em;
  margin-bottom: .3rem;
}
.track-group p { font-size: .85rem; color: var(--t2); line-height: 1.55; }

/* ══════════════════════════════════════════════════════
   DELIVERABLES
══════════════════════════════════════════════════════ */
.deliverables__grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .deliverables__grid { grid-template-columns: repeat(3, 1fr); } }

.del-card {
  background: #F5F4F0; border: 1px solid var(--border);
  border-radius: var(--r4); padding: 1.75rem;
  box-shadow: 0 1px 4px rgba(26,26,26,.04);
}
.del-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: .85rem; color: var(--t1); }
.del-card p, .del-card ul li { font-size: .9rem; color: var(--t2); line-height: 1.65; }

/* ══════════════════════════════════════════════════════
   JUDGING CRITERIA TABLE
══════════════════════════════════════════════════════ */
.judging-table {
  width: 100%; border-collapse: collapse;
  background: #F5F4F0; border: 1px solid var(--border);
  border-radius: var(--r4); overflow: hidden;
  box-shadow: 0 2px 8px rgba(26,26,26,.05);
}
.judging-table th, .judging-table td {
  padding: 1.1rem 1.75rem; text-align: left;
  border-bottom: 1px solid var(--border);
}
.judging-table th {
  background: var(--bg-card);
  font-weight: 700; font-size: .78rem; color: var(--t3);
  text-transform: uppercase; letter-spacing: .08em;
}
.judging-table td { font-size: .95rem; color: var(--t1); }
.judging-table tbody tr:hover { background: var(--bg-card); }
.judging-table tfoot td {
  font-weight: 800; color: var(--accent);
  border-bottom: none; background: var(--accent-bg);
}

/* ══════════════════════════════════════════════════════
   TIMELINE
══════════════════════════════════════════════════════ */
.timeline {
  position: relative; padding-left: 1.1rem;
  display: flex; flex-direction: column;
}
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 14px; bottom: 14px;
  width: 1px; background: linear-gradient(to bottom, var(--accent), var(--border-md), transparent);
}
.timeline__item {
  display: grid; grid-template-columns: 18px 1fr;
  gap: 1.5rem; align-items: flex-start; padding-bottom: 2.5rem;
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__marker {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-alt); border: 2px solid var(--border-md);
  margin-top: 2px; flex-shrink: 0; position: relative; left: -1rem; z-index: 1;
  transition: border-color .2s, background .2s;
}
.timeline__item--active .timeline__marker { border-color: var(--green); background: var(--green-bg); }
.timeline__item:hover .timeline__marker { border-color: var(--accent); }
.timeline__content { display: flex; flex-direction: column; gap: .45rem; }
.timeline__date { font-family: var(--mono); font-size: .7rem; color: var(--accent); letter-spacing: .07em; font-weight: 500; }
.timeline__content h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.timeline__content p { font-size: .88rem; color: var(--t2); line-height: 1.7; }
.timeline__cta { align-self: flex-start; font-size: .82rem; font-weight: 700; color: var(--accent); margin-top: .1rem; }
.timeline__cta:hover { text-decoration: underline; }

/* ══════════════════════════════════════════════════════
   REWARDS & PRIZES
══════════════════════════════════════════════════════ */
.rewards__grid { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 2.5rem; }
@media (min-width: 768px) { .rewards__grid { flex-direction: row; gap: 2.5rem; } }

.reward-block {
  flex: 1; display: flex; flex-direction: column; gap: 1.1rem;
  padding: 2rem; border: 1px solid var(--border); border-radius: var(--r4);
  background: #F5F4F0; box-shadow: 0 1px 4px rgba(26,26,26,.04);
}
.reward-block__icon {
  width: 46px; height: 46px; border-radius: var(--r3);
  border: 1px solid var(--accent-br); background: var(--accent-bg);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.reward-block h3 { font-size: 1rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.reward-block p { font-size: .88rem; color: var(--t2); line-height: 1.8; }

/* Prize table */
.prize-table {
  border: 1px solid var(--border); border-radius: var(--r4); overflow: hidden;
  background: #F5F4F0; box-shadow: 0 2px 8px rgba(26,26,26,.05);
}
.prize-table__row {
  display: grid; grid-template-columns: 140px 1fr auto;
  gap: 1.25rem; align-items: center; padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border); transition: background .15s;
}
.prize-table__row:last-child { border-bottom: none; }
.prize-table__row:hover { background: var(--bg-card); }
.prize-table__row--header {
  background: var(--bg-card); pointer-events: none;
  font-family: var(--mono); font-size: .6rem; color: var(--t3);
  text-transform: uppercase; letter-spacing: .12em;
}
.prize-table__row--1 { background: var(--accent-bg); border-left: 3px solid var(--accent); }
.prize-table__row--all { background: rgba(26,26,26,.02); }
.prize-rank { font-weight: 700; font-size: .92rem; letter-spacing: -.025em; color: var(--t1); }
.prize-table__row div { display: flex; flex-direction: column; gap: 3px; }
.prize-table__row div strong { font-size: .9rem; font-weight: 700; color: var(--t1); }
.prize-table__row div span { font-size: .78rem; color: var(--t2); line-height: 1.4; }
.prize-table__row > span:last-child { font-family: var(--mono); font-size: .67rem; color: var(--t3); text-align: right; }
@media (max-width: 600px) {
  .prize-table__row { grid-template-columns: 100px 1fr; }
  .prize-table__row > span:last-child { display: none; }
  .prize-table__row--header { display: none; }
}

/* Rewards intro list */
.rewards__intro { margin-bottom: 3.5rem; }
.rewards-list { display: flex; flex-direction: column; gap: .8rem; }
.rewards-list li {
  display: flex; align-items: center; gap: 12px;
  font-size: 1.05rem; font-weight: 500; color: var(--t1);
}
.rewards-list li::before {
  content: ''; display: block; width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%; flex-shrink: 0;
}

.tier-title { font-size: 1.35rem; font-weight: 800; margin-bottom: 1.5rem; letter-spacing: -.03em; color: var(--t1); }
.tier-subtitle { font-size: .9rem; color: var(--t3); margin-top: -.75rem; margin-bottom: 1.5rem; }

.recognition-grid { display: flex; flex-wrap: wrap; gap: .65rem; }
.recog-tag {
  background: var(--bg-white); border: 1px solid var(--border);
  color: var(--t2); padding: .5rem 1.1rem;
  border-radius: 100px; font-size: .84rem; font-weight: 500;
  transition: border-color .15s, color .15s;
}
.recog-tag:hover { border-color: var(--accent); color: var(--accent); }

/* SSF block */
.ssf-block h3 { font-size: 1.35rem; font-weight: 800; letter-spacing: -.03em; margin-bottom: .75rem; color: var(--t1); }
.ssf-block > p { font-size: .95rem; color: var(--t2); }

/* Awards visual */
.awards__visual {
  display: flex; justify-content: center; margin-bottom: 3rem;
}
.awards__visual img {
  width: 100%; max-width: 480px; border-radius: var(--r4);
  box-shadow: 0 16px 48px rgba(26,26,26,.12);
}

/* ══════════════════════════════════════════════════════
   REGISTRATION FORM
══════════════════════════════════════════════════════ */
/* Stepper */
.stepper {
  display: flex; align-items: center; max-width: 500px;
  margin: 0 auto 2.5rem;
}
.stepper__step { display: flex; flex-direction: column; align-items: center; gap: 6px; flex-shrink: 0; }
.stepper__dot {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--bg-card); border: 1.5px solid var(--border-md);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: .75rem; color: var(--t3);
  transition: all .25s;
}
.stepper__step span { font-family: var(--mono); font-size: .59rem; color: var(--t3); text-transform: uppercase; letter-spacing: .1em; white-space: nowrap; }
.stepper__step.active .stepper__dot { background: var(--accent); border-color: var(--accent); color: #fff; box-shadow: 0 0 0 4px rgba(30,58,138,.15); }
.stepper__step.active span { color: var(--accent); }
.stepper__step.done .stepper__dot { background: var(--green-bg); border-color: rgba(26,122,64,.4); color: var(--green); }
.stepper__line { flex: 1; height: 1px; background: var(--border); margin: 0 4px 16px; transition: background .3s; }
.stepper__line.done { background: rgba(26,122,64,.35); }

/* Form card */
.regform {
  max-width: 580px; margin: 0 auto;
  background: #F5F4F0; border: 1px solid var(--border);
  border-radius: var(--r4); box-shadow: 0 4px 20px rgba(26,26,26,.08);
}
.regform__panel { display: none; padding: 2rem; }
@media (min-width: 480px) { .regform__panel { padding: 2.25rem; } }
.regform__panel.active { display: block; }
.regform__title { font-size: 1.1rem; font-weight: 700; letter-spacing: -.03em; margin-bottom: .35rem; color: var(--t1); }
.regform__desc { font-size: .85rem; color: var(--t2); margin-bottom: 1.6rem; line-height: 1.65; }

/* Fields */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; margin-bottom: .9rem; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: .9rem; }
.field:last-of-type { margin-bottom: 0; }
.field label { font-size: .78rem; font-weight: 600; color: var(--t2); }
.req { color: #c0392b; margin-left: 1px; }
.field input,
.field select {
  background: var(--bg); border: 1.5px solid var(--border-md);
  border-radius: var(--r3); color: var(--t1);
  font-family: var(--sans); font-size: .9rem;
  padding: 10px 12px; width: 100%; outline: none;
  transition: border-color .18s, box-shadow .18s;
  -webkit-appearance: none; appearance: none;
}
.field input:focus,
.field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(30,58,138,.12); }
.field input::placeholder { color: var(--t4); }
.field select option { background: var(--bg-white); color: var(--t1); }

/* Member card */
.member-card {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--r3); padding: 1.1rem; margin-bottom: .75rem;
}
.mc-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .9rem; }
.mc-label { font-size: .78rem; font-weight: 700; color: var(--t3); }
.mc-remove {
  width: 26px; height: 26px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(192,57,43,.07); color: rgba(192,57,43,.55);
  transition: all .18s;
}
.mc-remove:hover { background: rgba(192,57,43,.15); color: #c0392b; }
.lead-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; margin-top: .5rem;
  border: 1.5px dashed var(--border-md);
  border-radius: var(--r2); font-size: .8rem; color: var(--t2); line-height: 1.4;
}
.lead-row input[type="checkbox"] { accent-color: var(--accent); width: 14px; height: 14px; flex-shrink: 0; }

.btn-add {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  width: 100%; padding: 10px; border-radius: var(--r3);
  border: 1.5px dashed var(--border-md); font-size: .85rem; color: var(--t3);
  margin-bottom: .85rem; transition: border-color .18s, color .18s;
}
.btn-add:hover { border-color: var(--accent); color: var(--accent); }

/* Pay summary */
.pay-summary {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--r3); padding: 1.1rem;
  display: flex; flex-direction: column; gap: .5rem;
  margin-bottom: .85rem;
}
.ps-row { display: flex; justify-content: space-between; font-size: .875rem; color: var(--t2); }
.ps-row .v { font-weight: 600; color: var(--t1); }
.ps-total { display: flex; justify-content: space-between; font-size: .95rem; font-weight: 700; padding-top: .65rem; border-top: 1px solid var(--border); }
.ps-total .v { color: var(--accent); font-size: 1.1rem; }
.pay-note {
  display: flex; align-items: flex-start; gap: 8px; margin-bottom: .25rem;
  font-size: .78rem; color: var(--t3); line-height: 1.55;
}
.pay-note svg { flex-shrink: 0; margin-top: 2px; }

/* Error */
.form-error {
  background: rgba(192,57,43,.06); border: 1.5px solid rgba(192,57,43,.18);
  border-radius: var(--r2); padding: 8px 12px; margin-bottom: .75rem;
  font-family: var(--mono); font-size: .75rem; color: #a93226;
  line-height: 1.5;
}

/* Confirmation */
.confirm {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 1.25rem; padding-top: .5rem;
}
.confirm__icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--green-bg); border: 1.5px solid rgba(26,122,64,.3);
  display: flex; align-items: center; justify-content: center;
  color: var(--green); animation: pop .45s cubic-bezier(.34,1.56,.64,1);
}
@keyframes pop { from { transform: scale(0); opacity: 0; } to { transform: none; opacity: 1; } }
.confirm h3 { font-size: 1.35rem; font-weight: 800; letter-spacing: -.04em; color: var(--t1); }
.confirm > p { font-size: .88rem; color: var(--t2); }
.team-id-box {
  background: var(--bg-card); border: 1.5px solid var(--border); border-radius: var(--r3);
  padding: 1.1rem 1.5rem; display: flex; flex-direction: column;
  align-items: center; gap: .65rem; width: 100%; max-width: 280px;
}
.team-id-label { font-family: var(--mono); font-size: .6rem; color: var(--t3); text-transform: uppercase; letter-spacing: .12em; }
.team-id-value { font-family: var(--mono); font-size: 1.35rem; font-weight: 500; color: var(--accent); letter-spacing: .08em; }
.btn-copy {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .78rem; color: var(--t2); background: var(--bg-white);
  border: 1px solid var(--border); padding: 4px 12px; border-radius: var(--r2);
  transition: border-color .18s, color .18s;
}
.btn-copy:hover { color: var(--t1); border-color: var(--border-md); }
.confirm__info {
  display: flex; flex-direction: column; gap: .55rem;
  width: 100%; text-align: left;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--r3); padding: 1rem 1.1rem;
}
.confirm__row { display: flex; align-items: flex-start; gap: 9px; font-size: .84rem; color: var(--t2); }
.confirm__row svg { color: var(--t4); flex-shrink: 0; margin-top: 2px; }
.confirm__row strong { color: var(--t1); }

/* ══════════════════════════════════════════════════════
   FAQ
══════════════════════════════════════════════════════ */
.faq__grid { display: flex; flex-direction: column; gap: 2.5rem; }
@media (min-width: 768px) {
  .faq__grid { flex-direction: row; gap: 4.5rem; align-items: flex-start; }
  .faq__head { flex: 0 0 250px; position: sticky; top: 72px; }
}
.faq__head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: .7rem; letter-spacing: -.04em; }
.faq__head p { font-size: .9rem; color: var(--t2); line-height: 1.7; }
.faq__head a { color: var(--accent); font-weight: 600; }
.faq__head a:hover { text-decoration: underline; }
.faq__list {
  flex: 1; display: flex; flex-direction: column; gap: 0;
  border: 1px solid var(--border); border-radius: var(--r4); overflow: hidden;
  background: #F5F4F0; box-shadow: 0 2px 8px rgba(26,26,26,.05);
}
.faq__item { border-bottom: 1px solid var(--border); }
.faq__item:last-child { border-bottom: none; }
.faq__q {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 1.1rem 1.5rem;
  font-size: .9rem; font-weight: 600; text-align: left; color: var(--t1);
  transition: color .15s, background .15s;
}
.faq__q:hover { color: var(--accent); background: var(--accent-bg); }
.faq__icon { flex-shrink: 0; color: var(--t4); margin-left: .75rem; transition: transform .28s, color .15s; }
.faq__item.open .faq__icon { transform: rotate(45deg); color: var(--accent); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .38s ease, padding .25s; padding: 0 1.5rem; }
.faq__item.open .faq__a { max-height: 600px; padding: 0 1.5rem 1.25rem; }
.faq__a p { font-size: .88rem; color: var(--t2); line-height: 1.85; }

/* ══════════════════════════════════════════════════════
   CONTACT
══════════════════════════════════════════════════════ */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 600px) { .contact__grid { grid-template-columns: 1fr; } }
.contact__block {
  padding: 2.25rem; border: 1px solid var(--border); border-radius: var(--r4);
  background: #F5F4F0; display: flex; flex-direction: column; gap: .85rem;
  transition: box-shadow .18s, border-color .18s;
  box-shadow: 0 1px 4px rgba(26,26,26,.04);
}
.contact__block:hover { box-shadow: 0 4px 16px rgba(26,26,26,.08); border-color: var(--border-md); }
.contact__icon {
  width: 44px; height: 44px; border: 1px solid var(--accent-br);
  background: var(--accent-bg); border-radius: var(--r3);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.contact__block h3 { font-size: 1rem; font-weight: 700; letter-spacing: -.02em; color: var(--t1); }
.contact__block p { font-size: .88rem; color: var(--t2); line-height: 1.7; }
.contact__link { font-weight: 700; font-size: .9rem; color: var(--accent); transition: opacity .15s; }
.contact__link:hover { opacity: .7; }
.contact__hours { font-family: var(--mono); font-size: .67rem; color: var(--t3); }

/* ══════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════ */
.footer {
  position: relative; z-index: 1;
  background: var(--bg-alt); border-top: 1px solid var(--border);
  padding: 2.5rem 0 1.75rem;
}
.footer__inner { display: flex; flex-direction: column; gap: 1.1rem; margin-bottom: 1.5rem; }
@media (min-width: 640px) { .footer__inner { flex-direction: row; align-items: flex-start; justify-content: space-between; } }
.footer__credit { font-size: .82rem; color: var(--t2); font-weight: 600; margin-bottom: .25rem; }
.footer__legal { font-family: var(--mono); font-size: .63rem; color: var(--t3); line-height: 1.65; max-width: 480px; }
.footer__links { display: flex; flex-wrap: wrap; gap: .35rem .9rem; flex-shrink: 0; }
.footer__links a { font-size: .8rem; color: var(--t3); transition: color .15s; }
.footer__links a:hover { color: var(--t1); }
.footer__copy { font-family: var(--mono); font-size: .63rem; color: var(--t4); padding-top: 1.25rem; border-top: 1px solid var(--border); }

/* WhatsApp FAB */
.wa-fab {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 999;
  display: inline-flex; align-items: center; gap: 7px;
  background: #128C7E; color: #fff; font-weight: 600; font-size: .8rem;
  padding: 9px 15px 9px 12px; border-radius: 40px;
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
  transition: transform .18s, box-shadow .18s;
}
.wa-fab:hover { transform: translateY(-2px); box-shadow: 0 6px 22px rgba(0,0,0,.2); }

/* ══════════════════════════════════════════════════════
   SECTION VISUALS (hero/about image blocks)
══════════════════════════════════════════════════════ */
.section-visual {
  width: 100%; border-radius: var(--r4); overflow: hidden;
  box-shadow: 0 12px 36px rgba(26,26,26,.1);
  margin-bottom: 3rem;
}
.section-visual img { width: 100%; height: auto; display: block; }

.section-visual--side {
  flex-shrink: 0; width: 100%; max-width: 400px;
  border-radius: var(--r4); overflow: hidden;
  box-shadow: 0 12px 36px rgba(26,26,26,.1);
}

/* ══════════════════════════════════════════════════════
   RESPONSIVE TWEAKS
══════════════════════════════════════════════════════ */
@media (max-width: 375px) {
  .hero__h1 { font-size: 2.4rem; }
  .hero__cd { padding: .9rem 1rem; }
  .cd-n { font-size: 1.45rem; }
  .cd-unit { min-width: 38px; }
  .section { padding: 4rem 0; }
  .prize-table__row { grid-template-columns: 80px 1fr; }
}

@media (max-width: 414px) {
  .hero__inner { gap: 2.25rem; }
  .hero__h1 { font-size: 2.6rem; }
  .section { padding: 4.5rem 0; }
}


/* ── Timeline & Steps content panels — solid surface for readability ── */
.timeline__content {
  background: #F5F4F0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--r3);
  border: 1px solid var(--border);
}

/* Section base: transparent by default — 3D canvas shows through */
/* For no-webgl fallback, restore tonal separations */
body.no-webgl .section--alt { background: #E8E7E2; }
body.no-webgl .section--white { background: #FAFAF8; }
body.no-webgl .hero { background: #EDECE8; }