:root {
  --bg: #ffffff;
  --surface: #f5f4fa;
  --text: #17151f;
  --muted: #5c5870;
  --accent: #6c4cf1;
  --line: #e4e1ef;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0e14;
    --surface: #1a1823;
    --text: #f2f0fa;
    --muted: #a9a4bd;
    --accent: #9d88ff;
    --line: #2b2838;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

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; justify-content: space-between; height: 64px; }
header.site a.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 19px; }
header.site a.brand img { width: 32px; height: 32px; border-radius: 8px; }
header.site nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 15px; }
header.site nav a:hover { color: var(--text); }

main { padding: 48px 0 64px; }

.hero { text-align: center; padding: 24px 0 8px; }
.hero img.icon { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18); }
.hero h1 { font-size: 40px; line-height: 1.15; margin: 28px 0 12px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 20px; color: var(--muted); margin: 0 auto; max-width: 560px; }
.badge { display: inline-block; margin-top: 28px; padding: 12px 22px; border-radius: 12px; background: var(--text); color: var(--bg); font-weight: 600; text-decoration: none; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin: 48px 0 0; }
.feature { background: var(--surface); border-radius: 16px; padding: 20px 22px; }
.feature h3 { margin: 0 0 6px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
p.meta { color: var(--muted); margin: 0 0 24px; }
.note { background: var(--surface); border-radius: 14px; padding: 16px 20px; }

footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer.site .wrap { padding-top: 24px; padding-bottom: 40px; }
footer.site p { margin: 6px 0; }

@media (max-width: 520px) {
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 18px; }
  header.site nav a { margin-left: 12px; }
}