:root {
  --bg: #0b0c0f;
  --surface: #131519;
  --surface-2: #1a1d22;
  --border: #24282f;
  --text: #e8eaee;
  --muted: #8b919c;
  --accent: #8ca8ff;
  --ok: #4ade80;
  --warn: #fbbf24;
  --apache: #f97316;
  --mit: #4ade80;
  --mpl: #f472b6;
  --bsd: #60a5fa;
  --isc: #a78bfa;
  --cc: #facc15;
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --surface-2: #eef0f4;
    --border: #dde1e7;
    --text: #14161a;
    --muted: #5d6470;
    --accent: #3d5fd9;
    --ok: #15803d;
    --mit: #15803d;
    --cc: #a16207;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* языки: показываем только выбранный */
html:not([data-lang="en"]) body [lang="en"],
html[data-lang="en"] body [lang="ru"] { display: none !important; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 16px; z-index: 10; background: var(--surface); padding: 8px 12px; border-radius: 8px; }

.container { max-width: 920px; margin: 0 auto; padding: 0 16px; }

/* шапка */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.wordmark { font-weight: 800; letter-spacing: .12em; color: var(--text); font-size: 18px; }
.wordmark:hover { text-decoration: none; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; }
.wordmark img { width: 32px; height: 32px; border-radius: 8px; flex: none; }
.app-icon { display: block; width: 96px; height: 96px; border-radius: 22px; margin-bottom: 20px;
  box-shadow: 0 10px 40px rgba(40, 110, 255, .35); }
.nav { display: flex; gap: 20px; flex: 1; font-size: 14px; }
.nav a { color: var(--muted); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); text-decoration: none; }
.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang-switch button {
  background: none; border: 0; color: var(--muted); font: 600 12px var(--font);
  padding: 6px 10px; cursor: pointer;
}
.lang-switch button[aria-pressed="true"] { background: var(--surface-2); color: var(--text); }
@media (max-width: 640px) {
  .header-inner { gap: 12px; }
  .nav { gap: 12px; font-size: 13px; overflow-x: auto; }
  .nav .opt { display: none; }
}

/* контент */
main { padding: 48px 0 64px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; margin-bottom: 24px;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -.02em; }
h2 { font-size: 22px; margin: 0; letter-spacing: -.01em; }
h3 { font-size: 18px; margin: 40px 0 12px; }
.meta { font: 13px var(--mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 20px; margin-bottom: 32px; }
.intro { color: var(--muted); font-size: 17px; margin-bottom: 32px; }
.prose p, .prose li { color: var(--text); }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.muted { color: var(--muted); }

.section { margin-top: 44px; }
.section-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.section-num {
  flex: none; width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border); font: 600 13px var(--mono); color: var(--accent);
}

.callout {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 16px 20px; margin: 20px 0;
}
.callout strong { display: block; margin-bottom: 4px; }
.callout.warn { border-left-color: var(--warn); }

/* таблицы */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 600; white-space: nowrap; }
.todo td { color: var(--muted); font-style: italic; font-weight: 400; }

.badge {
  display: inline-block; font: 600 11px var(--mono); padding: 3px 8px; border-radius: 6px; white-space: nowrap;
  color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent);
}
.apache { --c: var(--apache); } .mit { --c: var(--mit); } .mpl { --c: var(--mpl); }
.bsd { --c: var(--bsd); } .isc { --c: var(--isc); } .cc { --c: var(--cc); }

.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; }
.summary-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.summary-card div:first-child { font: 12px var(--mono); color: var(--muted); }
.summary-card div:last-child { font-size: 28px; font-weight: 700; color: var(--c); }

.links-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.link-card {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text);
}
.link-card:hover { border-color: var(--accent); text-decoration: none; }
.link-card .ic {
  flex: none; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  font: 700 11px var(--mono); color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent);
}
.link-card small { display: block; color: var(--muted); font: 12px var(--mono); }

/* главная */
.hero { padding: 40px 0 24px; }
.hero h1 { font-size: clamp(36px, 7vw, 60px); }
.hero p { font-size: 19px; color: var(--muted); max-width: 620px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 12px;
  font-weight: 600; border: 1px solid var(--border); color: var(--text); background: var(--surface);
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #0b0c0f; border-color: var(--accent); }
.btn[aria-disabled="true"] { opacity: .6; pointer-events: none; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin-top: 16px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip { font: 13px var(--mono); padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); }

/* подвал */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; font-size: 14px; }
.footer-top { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
.footer-top nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-top nav a { color: var(--muted); }
.footer-top nav a:hover, .footer-top nav a[aria-current="page"] { color: var(--text); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-top: 20px; color: var(--muted); font-size: 13px; }