/* ==============================================
   2nth.me — The Human Skills Platform
   Design System: warm accent on 2nth foundation
   ============================================== */

:root {
  --c-carbon: #0a0a0a;
  --c-graphite: #141414;
  --c-gunmetal: #1c1c1e;
  --c-chassis: #232326;
  --c-titanium: #fafafa;
  --c-steel-900: #27272a;
  --c-steel-800: #3f3f46;
  --c-steel-700: #52525b;
  --c-steel-600: #71717a;
  --c-steel-500: #a1a1aa;
  --c-steel-400: #c4c4cc;
  --c-steel-300: #d4d4d8;
  --c-steel-200: #e4e4e7;
  --c-border: rgba(255,255,255,.06);
  --c-border-s: rgba(255,255,255,.1);
  --c-grid-line: rgba(255,255,255,.018);
  --c-accent: #14b8a6;
  --c-accent-dim: #0d9488;
  --c-accent-glow: rgba(20,184,166,.06);
  --c-accent-border: rgba(20,184,166,.15);
  /* Domain colors */
  --c-lead: #8b5cf6;
  --c-connect: #ec4899;
  --c-create: #f59e0b;
  --c-judge: #ef4444;
  --c-build: #10b981;
  --c-adapt: #06b6d4;
}

.light {
  --c-carbon: #fafaf9;
  --c-graphite: #f5f5f4;
  --c-gunmetal: #e7e5e4;
  --c-chassis: #d6d3d1;
  --c-titanium: #0a0a0a;
  --c-steel-900: #e7e5e4;
  --c-steel-800: #d6d3d1;
  --c-steel-700: #a8a29e;
  --c-steel-600: #78716c;
  --c-steel-500: #57534e;
  --c-steel-400: #44403c;
  --c-steel-300: #292524;
  --c-steel-200: #1c1917;
  --c-border: rgba(0,0,0,.06);
  --c-border-s: rgba(0,0,0,.1);
  --c-grid-line: rgba(0,0,0,.03);
  --c-accent-glow: rgba(20,184,166,.04);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
* { -webkit-font-smoothing: antialiased; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Barlow', system-ui, sans-serif;
  background: var(--c-carbon);
  color: var(--c-steel-500);
  line-height: 1.7;
  transition: background-color .3s, color .3s;
}

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

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── Typography ───────────────────────────────── */
.font-display { font-family: 'Bebas Neue', sans-serif; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

/* ── Nav ──────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: var(--c-carbon);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 0;
}
@supports (backdrop-filter: blur(12px)) {
  nav { background: color-mix(in srgb, var(--c-carbon) 85%, transparent); backdrop-filter: blur(12px); }
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
}
.nav-brand {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px; font-weight: 600; letter-spacing: 2px;
  color: var(--c-accent);
}
.nav-brand span { color: var(--c-steel-500); }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--c-steel-600); transition: color .15s;
}
.nav-link:hover { color: var(--c-steel-300); text-decoration: none; }
.nav-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase;
  background: var(--c-accent); color: var(--c-carbon);
  padding: 7px 18px; border-radius: 4px; transition: all .2s;
}
.nav-cta:hover { background: var(--c-accent-dim); text-decoration: none; }
.theme-toggle {
  display: flex; min-height: 36px; min-width: 36px;
  align-items: center; justify-content: center;
  border-radius: 4px; border: 1px solid var(--c-border);
  color: var(--c-steel-600); cursor: pointer; background: none;
  transition: color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--c-steel-400); border-color: var(--c-border-s); }
.mobile-menu { display: none; background: var(--c-carbon); border-bottom: 1px solid var(--c-border); }
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 12px 24px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--c-steel-500); border-bottom: 1px solid var(--c-border);
}
.mobile-menu a:hover { color: var(--c-titanium); background: var(--c-graphite); text-decoration: none; }

/* ── Buttons ──────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 6px; border: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  cursor: pointer; transition: all .2s; text-decoration: none;
}
.btn-primary { background: var(--c-accent); color: var(--c-carbon); }
.btn-primary:hover { background: var(--c-accent-dim); transform: translateY(-2px); text-decoration: none; }
.btn-outline { border: 1px solid var(--c-border-s); color: var(--c-steel-300); background: none; }
.btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent); text-decoration: none; }

/* ── Section labels ───────────────────────────── */
.sec-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 2.5px; text-transform: uppercase;
  font-weight: 700; color: var(--c-accent); margin-bottom: 12px;
}

/* ── Grid background ──────────────────────────── */
.grid-bg {
  background-image: radial-gradient(circle at 1px 1px, var(--c-grid-line) 1px, transparent 0);
  background-size: 32px 32px;
}

/* ── Cards ────────────────────────────────────── */
.card {
  background: var(--c-gunmetal);
  border: 1px solid var(--c-border);
  border-radius: 10px; padding: 28px;
  transition: all .2s;
}
.card:hover { border-color: var(--c-border-s); transform: translateY(-2px); }

/* ── Domain pills ─────────────────────────────── */
.domain-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 1.5px; text-transform: uppercase; font-weight: 600;
  padding: 6px 14px; border-radius: 6px;
  border: 1px solid var(--c-border-s);
  color: var(--c-steel-400); transition: all .2s;
  cursor: pointer; text-decoration: none;
}
.domain-pill:hover { text-decoration: none; transform: translateY(-1px); }
.domain-pill .dot { width: 8px; height: 8px; border-radius: 50%; }
.pill-lead .dot { background: var(--c-lead); }
.pill-lead:hover { border-color: var(--c-lead); color: var(--c-lead); }
.pill-connect .dot { background: var(--c-connect); }
.pill-connect:hover { border-color: var(--c-connect); color: var(--c-connect); }
.pill-create .dot { background: var(--c-create); }
.pill-create:hover { border-color: var(--c-create); color: var(--c-create); }
.pill-judge .dot { background: var(--c-judge); }
.pill-judge:hover { border-color: var(--c-judge); color: var(--c-judge); }
.pill-build .dot { background: var(--c-build); }
.pill-build:hover { border-color: var(--c-build); color: var(--c-build); }
.pill-adapt .dot { background: var(--c-adapt); }
.pill-adapt:hover { border-color: var(--c-adapt); color: var(--c-adapt); }

/* ── Domain cards ─────────────────────────────── */
.domain-card {
  background: var(--c-gunmetal);
  border: 1px solid var(--c-border);
  border-radius: 12px; padding: 32px;
  transition: all .25s; cursor: pointer;
  text-decoration: none; display: block; color: inherit;
}
.domain-card:hover { transform: translateY(-4px); text-decoration: none; }
.domain-card .domain-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px;
}
.domain-card h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px; letter-spacing: .04em; color: var(--c-titanium);
  margin-bottom: 6px;
}
.domain-card p { font-size: 14px; color: var(--c-steel-500); line-height: 1.6; }
.domain-card .skill-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  margin-top: 14px;
}

/* Domain-specific hover colors */
.domain-lead:hover { border-color: var(--c-lead); }
.domain-lead .domain-icon { background: rgba(139,92,246,.12); color: var(--c-lead); }
.domain-lead .skill-count { color: var(--c-lead); }

.domain-connect:hover { border-color: var(--c-connect); }
.domain-connect .domain-icon { background: rgba(236,72,153,.12); color: var(--c-connect); }
.domain-connect .skill-count { color: var(--c-connect); }

.domain-create:hover { border-color: var(--c-create); }
.domain-create .domain-icon { background: rgba(245,158,11,.12); color: var(--c-create); }
.domain-create .skill-count { color: var(--c-create); }

.domain-judge:hover { border-color: var(--c-judge); }
.domain-judge .domain-icon { background: rgba(239,68,68,.12); color: var(--c-judge); }
.domain-judge .skill-count { color: var(--c-judge); }

.domain-build:hover { border-color: var(--c-build); }
.domain-build .domain-icon { background: rgba(16,185,129,.12); color: var(--c-build); }
.domain-build .skill-count { color: var(--c-build); }

.domain-adapt:hover { border-color: var(--c-adapt); }
.domain-adapt .domain-icon { background: rgba(6,182,212,.12); color: var(--c-adapt); }
.domain-adapt .skill-count { color: var(--c-adapt); }

/* ── Skill cards ──────────────────────────────── */
.skill-card {
  background: var(--c-gunmetal);
  border: 1px solid var(--c-border);
  border-radius: 8px; padding: 20px;
  transition: all .2s; text-decoration: none;
  display: block; color: inherit;
}
.skill-card:hover { border-color: var(--c-accent); transform: translateY(-2px); text-decoration: none; }
.skill-card h4 {
  font-size: 15px; font-weight: 700; color: var(--c-titanium); margin-bottom: 4px;
}
.skill-card p { font-size: 13px; color: var(--c-steel-500); line-height: 1.5; }

/* ── Animations ───────────────────────────────── */
.blink { animation: blink 2s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: .3; } }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Footer ───────────────────────────────────── */
footer {
  border-top: 1px solid var(--c-border);
  padding: 32px 0; text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--c-steel-600);
}

/* ── Responsive ───────────────────────────────── */
@media (max-width: 768px) {
  .nav-links.desktop { display: none; }
  .domain-grid { grid-template-columns: 1fr !important; }
  .skill-grid { grid-template-columns: 1fr !important; }
}
@media (min-width: 769px) {
  .mobile-toggle { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .blink { animation: none !important; }
  .reveal { transition: none !important; opacity: 1 !important; transform: none !important; }
}