:root {
  color-scheme: light dark;
  --bg: #f4f7fb;
  --ink: #162033;
  --muted: #5e6b7d;
  --panel: rgba(255, 255, 255, .92);
  --line: rgba(22, 32, 51, .12);
  --primary: #4f6df5;
  --accent: #10a596;
  --soft: rgba(79, 109, 245, .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d111b;
    --ink: #f2f5fb;
    --muted: #a7b1c2;
    --panel: rgba(21, 28, 43, .94);
    --line: rgba(255, 255, 255, .12);
    --primary: #8da1ff;
    --accent: #55d5c7;
    --soft: rgba(141, 161, 255, .1);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(79, 109, 245, .2), transparent 35%),
    radial-gradient(circle at 90% 15%, rgba(16, 165, 150, .14), transparent 30%),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
}
header, nav, main, footer { width: min(960px, calc(100% - 32px)); margin-inline: auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 24px 0 14px; }
a { color: inherit; }
.brand { color: var(--ink); font-weight: 800; letter-spacing: -.02em; text-decoration: none; }
.back { display: inline-flex; align-items: center; min-height: 40px; padding: 0 15px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); text-decoration: none; }
.policy-nav { display: flex; gap: 8px; overflow-x: auto; padding: 6px 0 14px; scrollbar-width: thin; }
.policy-nav a { flex: 0 0 auto; padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--panel); text-decoration: none; font-size: 13px; }
.policy-nav a[aria-current="page"] { border-color: var(--primary); color: var(--ink); background: var(--soft); }
main { margin-top: 3vh; padding: clamp(24px, 5vw, 52px); border: 1px solid var(--line); border-radius: 18px; background: var(--panel); box-shadow: 0 24px 70px rgba(16, 25, 45, .1); backdrop-filter: blur(18px); }
h1 { margin: 0 0 10px; font-size: clamp(34px, 6vw, 54px); line-height: 1.08; letter-spacing: -.04em; }
h2 { margin: 34px 0 10px; font-size: 21px; line-height: 1.35; }
h3 { margin: 24px 0 8px; font-size: 17px; }
p, li, dd { color: var(--muted); }
ul, ol { padding-left: 22px; }
.updated { margin: 0 0 28px; color: var(--muted); }
.notice { margin: 24px 0 8px; padding: 16px 18px; border-left: 4px solid var(--primary); border-radius: 8px; background: var(--soft); color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 18px; }
.card { min-width: 0; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
.card h2, .card h3 { margin-top: 0; }
.card a {
  overflow-wrap: anywhere;
  word-break: break-word;
}
.price { margin: 6px 0; color: var(--ink); font-size: 28px; font-weight: 800; }
.badge { display: inline-block; padding: 3px 8px; border-radius: 999px; background: rgba(16, 165, 150, .12); color: var(--accent); font-size: 12px; font-weight: 700; }
strong, dt { color: var(--ink); }
footer { padding: 28px 0 52px; color: var(--muted); text-align: center; font-size: 14px; }
footer a { margin: 0 6px; }
@media (max-width: 520px) { header { align-items: flex-start; } main { margin-top: 1vh; } }