:root {
  --bg: #fbfbfa;
  --fg: #16151a;
  --muted: #6b6975;
  --line: #e8e6ee;
  --card: #ffffff;
  --accent: #5b4cf0;
  --accent-soft: rgba(91, 76, 240, 0.12);
  --header-bg: rgba(251, 251, 250, 0.8);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0c11;
    --fg: #f3f2f7;
    --muted: #9d9aab;
    --line: #25232e;
    --card: #15141b;
    --accent: #8b80ff;
    --accent-soft: rgba(139, 128, 255, 0.16);
    --header-bg: rgba(13, 12, 17, 0.75);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1040px; margin: 0 auto; padding: 0 32px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--header-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { white-space: nowrap; display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }
.logo-mark { display: block; border-radius: 7px; }
nav { display: flex; gap: 32px; }
nav a { color: var(--muted); font-size: 0.95rem; font-weight: 500; }
nav a:hover { color: var(--fg); text-decoration: none; }

/* Hero */
.hero {
  padding: 140px 0 120px;
  background:
    radial-gradient(600px 300px at 85% 10%, var(--accent-soft), transparent 70%),
    radial-gradient(500px 260px at 10% 90%, var(--accent-soft), transparent 70%);
}
.eyebrow { font-family: "JetBrains Mono", monospace; font-size: 0.85rem; color: var(--accent); margin: 0 0 24px; }
.hero h1 { font-size: clamp(2.4rem, 6.5vw, 4.25rem); line-height: 1.08; letter-spacing: -0.04em; margin: 0 0 28px; font-weight: 700; }
.accent { color: var(--accent); }
.lead { color: var(--muted); font-size: 1.2rem; max-width: 560px; margin: 0 0 40px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  font-weight: 600; font-size: 0.95rem; transition: transform 0.15s, border-color 0.15s;
}
.button:hover { text-decoration: none; transform: translateY(-1px); border-color: var(--muted); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Sections */
.section { padding: 112px 0; border-top: 1px solid var(--line); }
.section-label { font-family: "JetBrains Mono", monospace; font-size: 0.8rem; color: var(--muted); margin: 0 0 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.section h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -0.03em; line-height: 1.2; margin: 0 0 48px; }
.muted { color: var(--muted); font-size: 1.1rem; margin: 0; }
.two-col { display: grid; grid-template-columns: 1fr 1.3fr; gap: 64px; align-items: start; }
.two-col h2 { margin-bottom: 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.cards article {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}
.cards article:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-num { font-family: "JetBrains Mono", monospace; font-size: 0.8rem; color: var(--accent); }
.cards h3 { margin: 16px 0 10px; font-size: 1.15rem; letter-spacing: -0.01em; }
.cards p { margin: 0; color: var(--muted); }

.info { display: grid; grid-template-columns: max-content 1fr; gap: 16px 48px; margin: 0; font-size: 1.05rem; }
.info dt { color: var(--muted); }
.info dd { margin: 0; }

/* Privacy page */
.prose { max-width: 720px; padding-top: 96px; padding-bottom: 112px; }
.prose h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.03em; margin: 0 0 8px; }
.prose h2 { font-size: 1.25rem; margin: 48px 0 12px; }
.prose p { color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.footer-inner { display: flex; justify-content: space-between; padding-top: 40px; padding-bottom: 40px; }
.footer-inner a { color: var(--muted); }

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .header-inner { height: 64px; }
  nav { gap: 16px; }
  nav a:not(:last-child) { display: none; }
  nav a { font-size: 0.875rem; }
  .hero { padding: 88px 0 80px; }
  .section { padding: 80px 0; }
  .two-col { grid-template-columns: 1fr; gap: 24px; }
  .info { grid-template-columns: 1fr; gap: 4px; }
  .info dd { margin-bottom: 16px; }
  .footer-inner { flex-direction: column; gap: 8px; }
}