/* ============================================================
   FITBULL TRAINING LAB — Brutalist design system
   ============================================================ */

:root {
  --ink: #0A0A0A;
  --ink-2: #161514;
  --bone: #F5F1EA;
  --bone-2: #ECE6DB;
  --concrete: #C8C4BC;
  --concrete-2: #8C887F;
  --rule: rgba(10,10,10,.18);
  --rule-strong: rgba(10,10,10,.85);

  /* Accent — overridden via JS tweak */
  --accent: #E63946;
  --accent-ink: #0A0A0A;

  --font-display: "Archivo Black", "Anton", "Pretendard", "Helvetica Neue", Impact, sans-serif;
  --font-display-kr: "Pretendard", "Archivo Black", sans-serif;
  --font-body: "Pretendard", "Inter", -apple-system, "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --maxw: 1440px;
  --pad: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

/* Brutalist noise grain — full page */
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  opacity: .07; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* Dark mode (used by hero & some sections) */
.ink-bg { background: var(--ink); color: var(--bone); }
.ink-bg .rule { border-color: rgba(245,241,234,.18); }
.ink-bg ::selection { background: var(--accent); color: var(--ink); }
::selection { background: var(--ink); color: var(--accent); }

/* ===== Layout ===== */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.between { justify-content: space-between; }
.center { align-items: center; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.gap-24 { gap: 24px; } .gap-32 { gap: 32px; } .gap-48 { gap: 48px; }

hr.rule, .rule {
  border: 0; border-top: 1px solid var(--rule-strong);
  margin: 0;
}
.rule-thin { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* ===== Type scale ===== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow .dot { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; display: inline-block; }
.ink-bg .eyebrow { color: var(--bone); }

.display {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.88;
  font-size: clamp(56px, 11vw, 200px);
  text-transform: uppercase;
  margin: 0;
}
.display-kr {
  font-family: var(--font-display-kr);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.94;
  font-size: clamp(40px, 7vw, 120px);
  margin: 0;
}
.h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 0.92;
  font-size: clamp(40px, 6.5vw, 96px);
  text-transform: uppercase;
  margin: 0;
}
.h2 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 0.95;
  font-size: clamp(32px, 4.5vw, 64px);
  text-transform: uppercase;
  margin: 0;
}
.h3 {
  font-family: var(--font-display-kr);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-size: clamp(22px, 2.4vw, 32px);
  margin: 0;
}
.lead {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.5;
  color: rgba(10,10,10,.78);
  max-width: 60ch;
}
.ink-bg .lead { color: rgba(245,241,234,.78); }
.mono { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.num {
  font-family: var(--font-display);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* ===== Reusable bits ===== */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid currentColor;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.tag.solid { background: var(--ink); color: var(--bone); border-color: var(--ink); }
.tag.accent { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 18px 28px;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .08em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: var(--ink); color: var(--bone);
  cursor: pointer;
  transition: transform .15s ease, background .15s ease;
  position: relative;
}
.btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bone); border-color: var(--ink); }
.ink-bg .btn { background: var(--bone); color: var(--ink); border-color: var(--bone); }
.ink-bg .btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.ink-bg .btn-ghost { background: transparent; color: var(--bone); border-color: var(--bone); }
.ink-bg .btn-ghost:hover { background: var(--bone); color: var(--ink); }

.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(4px); }

/* Image placeholder — striped */
.placeholder {
  position: relative;
  background:
    repeating-linear-gradient(135deg, transparent 0 18px, rgba(10,10,10,.05) 18px 19px),
    var(--bone-2);
  border: 1px solid var(--rule-strong);
  display: flex; align-items: flex-end; justify-content: space-between;
  padding: 14px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
}
.placeholder.dark {
  background:
    repeating-linear-gradient(135deg, transparent 0 18px, rgba(245,241,234,.08) 18px 19px),
    var(--ink-2);
  color: var(--bone);
  border-color: rgba(245,241,234,.2);
}
.placeholder .ph-tl { position: absolute; top: 12px; left: 14px; }
.placeholder .ph-br { position: absolute; bottom: 12px; right: 14px; }

/* Marquee */
.marquee {
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  overflow: hidden;
  background: var(--bone);
  position: relative;
}
.ink-bg .marquee { background: var(--ink); border-color: rgba(245,241,234,.18); }
.marquee-track {
  display: flex; gap: 60px;
  white-space: nowrap;
  animation: marquee 40s linear infinite;
  padding: 18px 30px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 56px);
  letter-spacing: -.01em;
  text-transform: uppercase;
}
.marquee-track .star { color: var(--accent); }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Numbered grid label */
.cap {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink);
  border-top: 1px solid var(--rule-strong);
  padding-top: 10px;
}
.ink-bg .cap { color: var(--bone); border-color: rgba(245,241,234,.4); }

/* Section header */
.section-head {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
  padding: 80px 0 32px;
  border-top: 1px solid var(--rule-strong);
}
@media (max-width: 720px) { .section-head { grid-template-columns: 1fr; padding: 56px 0 24px; } }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--bone);
  border-bottom: 1px solid var(--rule-strong);
}
.nav.dark-nav { background: var(--ink); color: var(--bone); border-color: rgba(245,241,234,.18); }
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 0 var(--pad);
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.nav-logo { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-size: 18px; letter-spacing: .02em; text-transform: uppercase; }
.nav-logo img { width: 36px; height: 36px; object-fit: contain; }
.dark-nav .nav-logo img { filter: invert(1); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  position: relative; padding: 6px 0;
}
.nav-links a.active::after,
.nav-links a:hover::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; background: var(--accent);
}
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: .08em; text-transform: uppercase;
  background: var(--accent); color: var(--accent-ink);
  border: 1px solid var(--accent);
}
.nav-cta:hover { background: var(--ink); color: var(--bone); border-color: var(--ink); }
.dark-nav .nav-cta:hover { background: var(--bone); color: var(--ink); border-color: var(--bone); }

.nav-burger {
  display: none;
  width: 40px; height: 40px; align-items: center; justify-content: center;
  border: 1px solid currentColor; background: transparent; cursor: pointer;
}
.nav-burger span { display: block; width: 18px; height: 2px; background: currentColor; position: relative; }
.nav-burger span::before, .nav-burger span::after {
  content: ""; position: absolute; left: 0; right: 0; height: 2px; background: currentColor;
}
.nav-burger span::before { top: -6px; }
.nav-burger span::after { top: 6px; }

@media (max-width: 920px) {
  .nav-links, .nav-cta-wrap { display: none; }
  .nav-burger { display: inline-flex; }
}

/* Mobile menu overlay */
.mobile-menu {
  position: fixed; inset: 0; z-index: 200;
  background: var(--ink); color: var(--bone);
  display: flex; flex-direction: column;
  transform: translateY(-100%);
  transition: transform .35s cubic-bezier(.7,0,.2,1);
}
.mobile-menu.open { transform: none; }
.mobile-menu .mm-top {
  padding: 16px var(--pad); height: 72px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid rgba(245,241,234,.18);
}
.mobile-menu .mm-close { background: transparent; border: 1px solid var(--bone); width: 40px; height: 40px; }
.mobile-menu .mm-close::before { content: "✕"; }
.mobile-menu .mm-list { padding: 32px var(--pad); display: flex; flex-direction: column; gap: 4px; flex: 1; }
.mobile-menu .mm-list a {
  font-family: var(--font-display);
  font-size: clamp(36px, 8vw, 64px);
  letter-spacing: -0.01em;
  text-transform: uppercase;
  padding: 8px 0;
  border-bottom: 1px solid rgba(245,241,234,.18);
  display: flex; justify-content: space-between; align-items: baseline;
}
.mobile-menu .mm-list a span { font-family: var(--font-mono); font-size: 12px; color: var(--concrete); }
.mobile-menu .mm-foot { padding: 24px var(--pad); border-top: 1px solid rgba(245,241,234,.18); display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }

/* ===== Footer ===== */
.footer { background: var(--ink); color: var(--bone); padding: 80px 0 32px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 56px; }
@media (max-width: 920px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-top { grid-template-columns: 1fr; } }
.footer-mark { font-family: var(--font-display); font-size: clamp(56px, 8vw, 96px); letter-spacing: -.02em; line-height: .9; text-transform: uppercase; }
.footer h5 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--concrete); margin: 0 0 16px; }
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer ul a { font-size: 14px; }
.footer ul a:hover { color: var(--accent); }
.footer-bot { border-top: 1px solid rgba(245,241,234,.2); padding-top: 24px; display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--concrete); }
@media (max-width: 540px) { .footer-bot { flex-direction: column; gap: 12px; } }

/* ===== Big SVG asterisk for brutalist accent ===== */
.bigstar {
  width: clamp(60px, 8vw, 120px); height: clamp(60px, 8vw, 120px);
  color: var(--accent);
  flex-shrink: 0;
}
.bigstar.spin { animation: spin 14s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }