:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #e3e3e8;
  --accent: #0a84ff;
  --accent-text: #0066cc;
  --note-bg: #fff8e1;
  --note-line: #f0b400;
  --hl: #fff3c4;
  --tip-bg: #f2f7ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-soft: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --line: #38383a;
    --accent-text: #4da3ff;
    --note-bg: #2b2414;
    --note-line: #8a6d00;
    --hl: #4a3f12;
    --tip-bg: #0f1d2e;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent-text); }
img { max-width: 100%; }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: saturate(180%) blur(16px); -webkit-backdrop-filter: saturate(180%) blur(16px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 56px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 19px; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--text); text-decoration: none; font-size: 15px; padding: 6px 10px; border-radius: 8px; }
.nav a:hover { background: var(--bg-soft); }
.nav a[aria-current="page"] { color: var(--accent-text); font-weight: 600; }
@media (max-width: 560px) {
  .site-header .wrap { padding-top: 8px; padding-bottom: 6px; }
  .nav { width: 100%; justify-content: space-between; gap: 0; }
  .nav a { padding: 6px 6px; font-size: 14.5px; }
}

/* Page content */
main { padding: 40px 0 64px; }
h1 { font-size: 36px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 23px; letter-spacing: -0.01em; margin: 36px 0 10px; }
h3 { font-size: 18px; margin: 24px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 6px; }
.lede { font-size: 20px; color: var(--muted); margin-bottom: 24px; }
.sub { color: var(--muted); font-size: 15px; }
.updated { color: var(--muted); font-size: 15px; margin-bottom: 24px; }

/* Home */
.hero { text-align: center; padding: 40px 0 16px; }
.hero img { width: 112px; height: 112px; border-radius: 25px; box-shadow: 0 8px 24px rgba(10, 132, 255, 0.25); }
.hero h1 { font-size: 48px; margin-top: 20px; }
.hero .lede { max-width: 560px; margin: 0 auto 24px; }
.badge { display: inline-block; background: var(--text); color: var(--bg); border-radius: 12px; padding: 10px 20px; font-weight: 600; font-size: 15px; text-decoration: none; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 40px 0; }
.card { background: var(--bg-soft); border-radius: 16px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.links { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.links a { display: block; border: 1px solid var(--line); border-radius: 14px; padding: 16px; text-decoration: none; color: var(--text); }
.links a:hover { border-color: var(--accent); }
.links strong { display: block; }
.links span { color: var(--muted); font-size: 14.5px; }

/* Notes, tables, legal */
.draft, .note { border: 1px solid var(--note-line); background: var(--note-bg); border-radius: 12px; padding: 12px 16px; margin: 0 0 24px; font-size: 15px; }
.summary, .tip { border-left: 3px solid var(--accent); background: var(--tip-bg); border-radius: 0 12px 12px 0; padding: 12px 18px; margin: 0 0 24px; }
.summary ul { margin: 6px 0 0 0; }
.ph { background: var(--hl); padding: 0 3px; border-radius: 3px; }
.caps { font-weight: 600; }
.table-scroll { overflow-x: auto; margin: 0 0 18px; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--bg-soft); }
.legal ol { padding-left: 24px; }
.legal ul.inner { margin-top: 6px; }

/* Support */
details { border: 1px solid var(--line); border-radius: 12px; padding: 0 16px; margin-bottom: 10px; }
details[open] { padding-bottom: 6px; }
summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style-position: outside; }
.contact { background: var(--bg-soft); border-radius: 16px; padding: 20px; margin: 24px 0; }
.contact p:last-child { margin-bottom: 0; }

/* Data page */
.download { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin-bottom: 10px; }
.download strong { display: block; }
.download span { color: var(--muted); font-size: 14.5px; }
.button { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; font-size: 15px; border-radius: 10px; padding: 8px 16px; }
code { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 14px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }