:root {
  color-scheme: dark;
  --bg: #080b12;
  --bg-deep: #05070c;
  --surface: rgba(18, 24, 38, 0.78);
  --surface-strong: #111827;
  --text: #f8fafc;
  --muted: #9aa6ba;
  --subtle: #667085;
  --border: rgba(148, 163, 184, 0.16);
  --accent: #7c3aed;
  --accent-soft: rgba(124, 58, 237, 0.14);
  --accent-border: rgba(124, 58, 237, 0.34);
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #fb7185;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  font-family: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 18% -10%, var(--accent-soft), transparent 34rem),
    radial-gradient(circle at 90% 18%, rgba(59, 130, 246, 0.08), transparent 28rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  line-height: 1.6;
  overflow-x: hidden;
}
body.theme-indigo { --accent: #6366f1; --accent-soft: rgba(99, 102, 241, 0.14); --accent-border: rgba(99, 102, 241, 0.34); }
body.theme-emerald { --accent: #10b981; --accent-soft: rgba(16, 185, 129, 0.13); --accent-border: rgba(16, 185, 129, 0.32); }
body.theme-blue { --accent: #3b82f6; --accent-soft: rgba(59, 130, 246, 0.14); --accent-border: rgba(59, 130, 246, 0.34); }
body.theme-violet { --accent: #8b5cf6; --accent-soft: rgba(139, 92, 246, 0.14); --accent-border: rgba(139, 92, 246, 0.34); }

a { color: inherit; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--border);
}
.brand {
  font-size: .88rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: .88rem; }
.nav-links a { text-decoration: none; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }

.hero {
  min-height: 620px;
  display: grid;
  align-items: center;
  padding: 96px 0 84px;
}
.hero.compact { min-height: auto; padding: 110px 0 92px; }
.hero-copy { max-width: 860px; }
.hero h1 {
  max-width: 940px;
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: .96;
  letter-spacing: -.065em;
  text-wrap: balance;
}
.hero h1 span { color: var(--accent); }
.lede {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2.1vw, 1.4rem);
  line-height: 1.55;
}
.status-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  color: var(--muted);
  font-size: .9rem;
}
.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px var(--accent);
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
.button.secondary:hover { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.28); }

.section { padding: 88px 0; border-top: 1px solid var(--border); }
.section-head { max-width: 720px; margin-bottom: 38px; }
.section h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.08; letter-spacing: -.04em; }
.section-head p { margin: 16px 0 0; color: var(--muted); font-size: 1.02rem; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.012));
  box-shadow: var(--shadow);
}
.card { padding: 28px; }
.card .index { color: var(--accent); font-size: .78rem; letter-spacing: .12em; font-weight: 800; text-transform: uppercase; }
.card h3 { margin: 18px 0 10px; font-size: 1.25rem; line-height: 1.25; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.panel { padding: clamp(24px, 4vw, 42px); }
.boundary-list, .evidence-list { margin: 0; padding: 0; list-style: none; }
.boundary-list li, .evidence-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}
.boundary-list li:last-child, .evidence-list li:last-child { border-bottom: 0; }
.boundary-list li::before { content: "—"; color: var(--accent); font-weight: 800; }
.evidence-list li::before { content: "✓"; color: var(--good); font-weight: 800; }

.demo { display: grid; grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr); gap: 18px; align-items: stretch; }
.demo-controls { display: grid; gap: 18px; align-content: start; }
.field { display: grid; gap: 8px; }
.field label { color: var(--text); font-size: .9rem; font-weight: 700; }
.field small { color: var(--subtle); }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 13px 14px;
  background: rgba(3, 7, 18, .72);
  color: var(--text);
  outline: none;
}
textarea { min-height: 128px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.validation { min-height: 22px; color: var(--bad); font-size: .86rem; }

.terminal {
  min-height: 100%;
  padding: 24px;
  border: 1px solid rgba(148, 163, 184, .13);
  border-radius: var(--radius);
  background: #04070d;
  color: #c7d2fe;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
}
.terminal-head { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 18px; color: var(--subtle); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.terminal pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: .86rem/1.72 ui-monospace, SFMono-Regular, Menlo, monospace; }

.report { display: grid; gap: 16px; }
.report-score { display: flex; align-items: baseline; gap: 9px; }
.report-score strong { font-size: 3.8rem; line-height: 1; letter-spacing: -.06em; color: var(--accent); }
.report dl { display: grid; grid-template-columns: 140px 1fr; gap: 12px 18px; margin: 0; }
.report dt { color: var(--subtle); }
.report dd { margin: 0; color: var(--text); }
.report ul { margin: 0; padding-left: 20px; color: var(--muted); }

.notice {
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--muted);
}
.notice strong { color: var(--text); }

footer { border-top: 1px solid var(--border); padding: 34px 0 48px; color: var(--subtle); font-size: .86rem; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.footer-row a { color: var(--muted); text-underline-offset: 3px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }

@media (max-width: 820px) {
  .hero { min-height: 540px; padding: 76px 0 64px; }
  .grid, .grid.two, .demo { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .nav-links a:not(.language-link) { display: none; }
}

@media (max-width: 520px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .site-nav { min-height: 62px; }
  .hero { min-height: auto; padding: 72px 0 58px; }
  .hero h1 { font-size: clamp(2.65rem, 16vw, 4.2rem); }
  .actions, .actions .button { width: 100%; }
  .card, .panel { padding: 22px; border-radius: 18px; }
  .terminal { padding: 18px; }
  .report dl { grid-template-columns: 1fr; gap: 4px; }
  .report dd { margin-bottom: 10px; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}