/* SDKC66 — minimal black & white theme */
:root {
  --bg: #0b0b0d;
  --bg-soft: #121216;
  --bg-card: #101014;
  --ink: #f4f4f6;
  --ink-2: #b6b6bf;
  --ink-3: #83838d;
  --line: #26262d;
  --line-strong: #3a3a44;
  --accent: #ffffff;
  --radius: 4px;
  --max: 1080px;
  --read: 780px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Noto Sans", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: var(--line-strong); }
a:hover { text-decoration-color: var(--ink); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; font-weight: 650; }
h1 { font-size: 2.5rem; margin: 0 0 .8rem; }
h2 { font-size: 1.4rem; margin: 2.6rem 0 1rem; }
h3 { font-size: 1.02rem; margin: 1.6rem 0 .5rem; }
p, li { color: var(--ink-2); }
strong { color: var(--ink); font-weight: 600; }
code { font-family: var(--mono); font-size: .88em; color: var(--ink); background: var(--bg-soft); padding: 1px 5px; border: 1px solid var(--line); border-radius: 3px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.read { max-width: var(--read); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,11,13,.88);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); font-size: 1rem; letter-spacing: .02em; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 26px; height: 26px; border-radius: 4px; display: block; }
.nav-links { display: flex; gap: 20px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--ink-3); font-size: .9rem; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }

/* Hero */
.hero { padding: 84px 0 60px; border-bottom: 1px solid var(--line); }
.hero p.lead { font-size: 1.1rem; max-width: 620px; margin: 0 0 30px; }
.eyebrow { font-family: var(--mono); text-transform: uppercase; letter-spacing: .18em; font-size: .72rem; color: var(--ink-3); margin-bottom: 14px; }
.btn { display: inline-block; padding: 12px 22px; border-radius: var(--radius); font-weight: 600; font-size: .92rem; text-decoration: none; }
.btn-primary { background: var(--ink); color: #0b0b0d; border: 1px solid var(--ink); }
.btn-primary:hover { background: transparent; color: var(--ink); }
.btn-ghost { border: 1px solid var(--line-strong); color: var(--ink); margin-left: 10px; }
.btn-ghost:hover { border-color: var(--ink); }

/* Sections & cards */
.grid { display: grid; gap: 1px; margin: 28px 0 8px; background: var(--line); border: 1px solid var(--line); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card { border: none; border-radius: 0; padding: 24px; background: var(--bg-card); }
.card h3 { margin-top: 0; }
.card .num { font-family: var(--mono); color: var(--ink-3); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; }
.card .price { font-family: var(--mono); color: var(--ink); font-size: .86rem; margin-top: 14px; }
.section { padding: 60px 0; }
.section-alt { background: var(--bg-soft); border-block: 1px solid var(--line); }

/* Legal docs */
.doc { padding: 44px 0 64px; }
.doc-meta { font-family: var(--mono); color: var(--ink-3); font-size: .78rem; letter-spacing: .06em; margin-bottom: 8px; }
.doc h2 { border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: .4rem 0; }
.callout { border-left: 2px solid var(--ink); background: var(--bg-soft); padding: 14px 18px; margin: 22px 0; }
.callout p { margin: 0; color: var(--ink-2); }
.table-scroll { overflow-x: auto; margin: 18px 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
th { background: var(--bg-soft); color: var(--ink); font-weight: 600; }
.toc { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; margin: 24px 0 8px; font-size: .9rem; }
.toc ol { margin: 6px 0 0; padding-left: 20px; columns: 2; column-gap: 28px; }
.toc li { margin: 2px 0; break-inside: avoid; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-soft); padding: 40px 0 28px; margin-top: 40px; font-size: .9rem; }
.foot-grid { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; }
.foot-brand { max-width: 360px; }
.foot-note { margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: .82rem; font-family: var(--mono); letter-spacing: .02em; }

/* Cookie banner */
.cookie-bar { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 60; max-width: 620px; margin: 0 auto;
  background: #17171c; color: var(--ink); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 16px 18px; display: none; }
.cookie-bar.show { display: block; }
.cookie-bar p { color: var(--ink-2); font-size: .86rem; margin: 0 0 12px; }
.cookie-bar button { font: inherit; font-size: .84rem; font-weight: 600; border-radius: var(--radius); padding: 8px 14px; cursor: pointer; border: 1px solid var(--line-strong); background: transparent; color: var(--ink); margin-right: 8px; }
.cookie-bar button.primary { background: var(--ink); border-color: var(--ink); color: #0b0b0d; }

@media (max-width: 820px) {
  h1 { font-size: 1.85rem; }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .nav-links { gap: 13px; font-size: .85rem; }
  .toc ol { columns: 1; }
  .hero { padding: 50px 0 40px; }
}
@media (max-width: 560px) {
  .nav { height: 56px; }
  .nav-links a.hide-sm { display: none; }
}