:root { --bg: #f5f6fa; --surface: #fff; --border: #e2e5ee; --text: #151a2d; --muted: #646d86; --accent: #4b47e0; --accent-text: #fff; --green: #138a49; --red: #d22d2d; --amber: #b26a00; color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0c0e16; --surface: #141724; --border: #252a3d; --text: #e6e8f2; --muted: #9ba2ba; --accent: #8a87ff; --accent-text: #0c0e16; --green: #43c97f; --red: #ff6b6b; --amber: #f0b44c; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font: 15px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; display: grid; place-items: center; }
.wrap { width: 100%; max-width: 640px; padding: 32px 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 32px 28px; box-shadow: 0 1px 3px rgba(17,24,39,.06), 0 10px 30px rgba(17,24,39,.06); }
.center { text-align: center; }
h1 { font-size: 24px; margin: 8px 0 10px; letter-spacing: -.01em; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 16.5px; }
a { color: var(--accent); }
code { background: color-mix(in srgb, var(--accent) 10%, transparent); padding: 1px 6px; border-radius: 6px; font-size: .92em; }
.logo { width: 48px; height: 48px; }
.logo.big { width: 64px; height: 64px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-text); text-decoration: none; padding: 11px 20px; border-radius: 11px; font-weight: 650; }
.btn.big { padding: 14px 26px; font-size: 16px; }
.btn:hover { filter: brightness(1.06); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.checklist { list-style: none; margin: 18px 0; padding: 0; display: flex; flex-direction: column; gap: 12px; text-align: left; }
.checklist li { display: flex; gap: 12px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; }
.checklist .ic { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; flex: none; font-size: 13px; }
.checklist b { display: block; }
.checklist p { margin: 4px 0 0; font-size: 14px; }
.st-ok .ic { background: color-mix(in srgb, var(--green) 16%, transparent); color: var(--green); }
.st-bad .ic { background: color-mix(in srgb, var(--red) 16%, transparent); color: var(--red); }
.st-todo .ic { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.st-opt .ic { background: color-mix(in srgb, var(--muted) 16%, transparent); color: var(--muted); }
.hero h1 { font-size: 30px; }