:root {
  color-scheme: light dark;
  --ink: #1f2a33;
  --muted: #5b6770;
  --line: #d9e8e4;
  --panel: #ffffff;
  --accent: #127a67;
  --accent-strong: #1e9e84;
  --accent-soft: #e3f5f0;
  --page: #f3f8f6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef5f3;
    --muted: #a9b8b4;
    --line: #2b3b38;
    --panel: #16211f;
    --accent: #6fdcc4;
    --accent-strong: #1e9e84;
    --accent-soft: #1d3530;
    --page: #0d1514;
  }
}

* { box-sizing: border-box; }
html { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif; background: var(--page); color: var(--ink); }
body { margin: 0; background: radial-gradient(circle at 92% 0%, #c9efe5 0, transparent 34%), var(--page); }
@media (prefers-color-scheme: dark) { body { background: radial-gradient(circle at 92% 0%, #16342d 0, transparent 34%), var(--page); } }
a { color: var(--accent); }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 28px 0 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: .04em; }
.mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: white; background: linear-gradient(145deg, #2fc4a6, #1e9e84); font-size: 18px; }
main { padding: 20px 0 64px; }
.hero { padding: clamp(28px, 7vw, 64px); border: 1px solid var(--line); border-radius: 28px; background: var(--panel); box-shadow: 0 18px 44px #1e9e8414; }
.kicker { margin: 0 0 12px; color: var(--accent); font-weight: 800; letter-spacing: .14em; font-size: 13px; }
h1 { margin: 0; font-size: clamp(32px, 7vw, 56px); line-height: 1.12; letter-spacing: -.03em; }
.lead { max-width: 680px; margin: 22px 0 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; min-height: 48px; align-items: center; padding: 0 18px; border-radius: 14px; background: var(--accent-strong); color: white; text-decoration: none; font-weight: 750; }
.button.secondary { color: var(--accent); background: var(--accent-soft); }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.card, .policy { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.card h2, .policy h2 { margin-top: 0; font-size: 20px; }
.card p, .policy p, .policy li { color: var(--muted); line-height: 1.8; }
.policy { max-width: 820px; margin: 0 auto; }
.policy h1 { font-size: clamp(30px, 6vw, 44px); }
.policy h2 { margin-top: 34px; color: var(--ink); }
.policy ul { padding-left: 1.3em; }
.notice { padding: 16px 18px; border-radius: 14px; background: var(--accent-soft); color: var(--ink) !important; }
.error-page { min-height: 75vh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.error-page .button { margin-top: 28px; }
footer { padding: 24px 0 42px; color: var(--muted); font-size: 13px; }
footer .shell { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } .hero { border-radius: 22px; } }