:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #0f1724;
  --muted: #5b6676;
  --line: #e3e8ef;
  --accent: #2f6bff;
  --accent-soft: #e8efff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f16;
    --surface: #131a24;
    --text: #e8edf4;
    --muted: #93a0b2;
    --line: #222c3a;
    --accent: #6f9bff;
    --accent-soft: #1a2640;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }

.nav { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; padding-bottom: 24px; }
.logo { font-weight: 700; font-size: 20px; color: var(--text); letter-spacing: -0.02em; }
.nav nav a { margin-left: 20px; color: var(--muted); font-size: 15px; }

.hero { padding-top: 64px; padding-bottom: 48px; }
.hero h1 { font-size: clamp(36px, 7vw, 60px); line-height: 1.05; letter-spacing: -0.035em; margin: 0 0 20px; }
.lede { font-size: 20px; color: var(--muted); max-width: 560px; margin: 0; }

.apps { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; padding-bottom: 64px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 28px; display: flex; flex-direction: column; }
.card h2 { margin: 8px 0 8px; font-size: 26px; letter-spacing: -0.02em; }
.card p { color: var(--muted); margin: 0 0 24px; flex: 1; }
.tag { align-self: flex-start; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 3px 10px; border-radius: 999px; }
.btn { align-self: flex-start; background: var(--accent); color: #fff; font-weight: 600; font-size: 15px; padding: 10px 18px; border-radius: 12px; }
.btn:hover { text-decoration: none; opacity: .9; }
.btn[aria-disabled="true"] { background: var(--line); color: var(--muted); pointer-events: none; }

.contact { padding-bottom: 64px; }
.contact h2 { font-size: 24px; margin: 0 0 8px; }
.contact p { color: var(--muted); margin: 0; }

.doc { padding-top: 32px; padding-bottom: 64px; max-width: 720px; }
.doc h1 { font-size: 40px; letter-spacing: -0.03em; margin: 0 0 8px; }
.doc h2 { font-size: 22px; margin: 36px 0 8px; }
.doc p, .doc li { color: var(--muted); }
.updated { font-size: 14px; }

.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; border-top: 1px solid var(--line); padding-top: 24px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }