:root {
  --bg: #ffffff; --fg: #16181d; --muted: #5d6470; --card: #f4f6f9; --line: #e3e7ed;
  --accent: #2f7fd8; --z1: #8e5bd1; --z2: #2f7fd8; --z3: #3aa65b; --z4: #e58a2e; --z5: #d9453d;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d0f13; --fg: #eef1f6; --muted: #9aa3b2; --card: #171a21; --line: #262b35; --accent: #5ea4f0; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; gap: 12px; height: 64px; }
header.site img { width: 36px; height: 36px; border-radius: 9px; }
header.site a.brand { color: var(--fg); text-decoration: none; font-weight: 700; }
header.site nav { margin-left: auto; font-size: 15px; }
header.site nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
.hero { padding: 56px 0 32px; }
.hero img.icon { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 6px 24px rgba(0,0,0,.18); }
h1 { font-size: 40px; line-height: 1.15; margin: 20px 0 12px; letter-spacing: -0.5px; }
h2 { font-size: 26px; line-height: 1.25; margin: 40px 0 10px; }
h3 { font-size: 20px; margin: 28px 0 6px; }
.lead { font-size: 20px; color: var(--muted); margin: 0 0 24px; }
.badge img { height: 54px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 24px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.guides a.card { display: block; color: var(--fg); text-decoration: none; }
.guides a.card:hover { border-color: var(--accent); }
table { border-collapse: collapse; width: 100%; margin: 14px 0 22px; font-size: 15px; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { color: var(--muted); font-weight: 600; }
.note { background: var(--card); border-left: 4px solid var(--accent); padding: 12px 16px; border-radius: 8px; color: var(--muted); font-size: 15px; }
.zonebar { display: flex; height: 12px; border-radius: 6px; overflow: hidden; margin: 12px 0; }
.zonebar span:nth-child(1){background:var(--z1)} .zonebar span:nth-child(2){background:var(--z2)}
.zonebar span:nth-child(3){background:var(--z3)} .zonebar span:nth-child(4){background:var(--z4)}
.zonebar span:nth-child(5){background:var(--z5)}
.zonebar span { flex: 1; }
.cta { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; margin: 40px 0; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.cta img.icon { width: 64px; height: 64px; border-radius: 15px; }
.cta div { flex: 1; min-width: 220px; }
.cta p { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
.byline { color: var(--muted); font-size: 14px; margin-top: -4px; }
footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
@media (max-width: 520px) { h1 { font-size: 32px; } .lead { font-size: 18px; } }