:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --accent: #2456c9;
  --card: #f5f5f7;
  --border: #e3e3e8;
  --max: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101014;
    --fg: #f5f5f7;
    --muted: #9b9ba1;
    --accent: #6f9dff;
    --card: #1b1b21;
    --border: #2c2c33;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: var(--max); margin: 0 auto; padding: 3rem 1.5rem 4rem; }
header.hero { text-align: center; padding: 3.5rem 1.5rem 1rem; }
header.hero img.icon { width: 128px; height: 128px; border-radius: 28px; box-shadow: 0 12px 32px rgba(0,0,0,.18); }
h1 { font-size: 2.4rem; letter-spacing: -0.02em; margin: 1.2rem 0 .4rem; }
h2 { font-size: 1.5rem; letter-spacing: -0.01em; margin: 2.5rem 0 .8rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 .4rem; }
p, li { color: var(--fg); }
p.tagline { color: var(--muted); font-size: 1.25rem; max-width: 34em; margin: 0 auto; }
p.meta { color: var(--muted); font-size: .9rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding-left: 1.3em; margin: .6em 0 1em; }
li { margin: .35em 0; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; margin: 2rem 0; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.1rem 1.2rem; }
.feature h3 { margin: 0 0 .3rem; font-size: 1rem; }
.feature p { color: var(--muted); font-size: .95rem; }
.cta { display: inline-block; background: var(--accent); color: #fff; padding: .7rem 1.6rem; border-radius: 999px; font-weight: 600; margin: 1.6rem 0 .5rem; }
.cta:hover { text-decoration: none; opacity: .92; }
.note { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1rem 1.2rem; color: var(--muted); font-size: .95rem; margin: 1.2rem 0; }
footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 2rem 1.5rem 3rem; }
footer nav a { margin: 0 .6em; color: var(--muted); }
hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }