:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #5d6b82;
  --line: #d6dee8;
  --accent: #0f766e;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }

body { margin: 0; background: radial-gradient(circle at top left, rgba(45, 212, 191, 0.16), transparent 26rem), var(--bg); }

a { color: var(--accent); }

.page { width: min(900px, calc(100% - 32px)); margin: 0 auto; padding: 32px 0 48px; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 24px; }

.brand { color: var(--text); font-size: 18px; font-weight: 750; text-decoration: none; }

.back { font-size: 14px; }

main { padding: clamp(24px, 5vw, 48px); border: 1px solid var(--line); border-radius: 12px; background: var(--panel); box-shadow: 0 20px 55px rgba(15, 23, 42, 0.1); }

h1 { margin: 0 0 12px; font-size: clamp(30px, 5vw, 44px); line-height: 1.15; }

h2 { margin: 34px 0 10px; font-size: 22px; }

h3 { margin: 22px 0 8px; font-size: 17px; }

p, li { color: var(--muted); line-height: 1.75; }

.lead { margin: 0; font-size: 18px; }

.notice { margin: 24px 0; padding: 16px 18px; border-left: 4px solid var(--accent); border-radius: 6px; background: #edf8f6; }

.notice p { margin: 0; color: var(--text); }

.steps { padding-left: 24px; }

.site-footer { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 22px; color: var(--muted); font-size: 14px; }

.site-footer a { color: inherit; }

@media (max-width: 640px) {
  .page { width: min(100% - 24px, 900px); padding-top: 20px; }
  .topbar { align-items: flex-start; flex-direction: column; }
  main { padding: 24px; }
}