:root {
  --bg: #f6f6fb; --surface: #ffffff; --text: #14141f; --muted: #5d5d72; --hair: rgba(20,20,31,.08);
  --brand1: #4f46e5; --brand2: #8c4ded;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0b12; --surface: #16161f; --text: #f2f2f7; --muted: #a0a0b4; --hair: rgba(255,255,255,.08); }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif; }
a { color: var(--brand1); }
.hero { background: linear-gradient(135deg, var(--brand1), var(--brand2)); color: #fff; padding: 72px 20px 96px; text-align: center; }
.hero h1 { font: 800 44px/1.1 ui-rounded, -apple-system, system-ui, sans-serif; margin: 16px 0 10px; letter-spacing: -.5px; }
.hero p { margin: 0 auto; max-width: 30em; opacity: .9; }
.mark { width: 72px; height: 72px; border-radius: 20px; background: #fff; display: inline-grid; place-items: center; box-shadow: 0 12px 30px rgba(0,0,0,.2); font-size: 34px; }
main { max-width: 760px; margin: -56px auto 48px; padding: 0 20px; }
.card { background: var(--surface); border: 1px solid var(--hair); border-radius: 22px; padding: 28px; box-shadow: 0 10px 30px rgba(20,20,40,.06); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-top: 8px; }
.feature h3 { margin: 8px 0 4px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
.emoji { font-size: 24px; }
footer { text-align: center; color: var(--muted); font-size: 14px; padding: 0 20px 40px; }
h2 { margin-top: 28px; font-size: 20px; }
.muted { color: var(--muted); }