:root { --bg: #ffffff; --ink: #16181d; --muted: #5b6270; --line: #e4e7ec; --accent: #14a05a; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1114; --ink: #eceff3; --muted: #9aa3b0; --line: #262a31; --accent: #34c27a; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
main, header, footer { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 8px; }
header a.brand { font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 0.95rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }
h1 { font-size: 2.1rem; line-height: 1.2; letter-spacing: -0.02em; margin: 40px 0 12px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
p, li { color: var(--ink); }
.lede { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
ul { padding-left: 1.2em; }
li { margin: 4px 0; }
a { color: var(--accent); }
.features { list-style: none; padding: 0; display: grid; gap: 14px; margin: 28px 0; }
.features li { border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; }
.features b { display: block; }
footer { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 18px; padding-bottom: 40px; font-size: 0.9rem; color: var(--muted); }
footer a { color: var(--muted); }