:root {
  --bg: #F4F5F7; --surface: #FFFFFF; --text: #111827; --muted: #4B5563; --border: #D1D5DB; --accent: #D94A09;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #111827; --surface: #1F2937; --text: #F3F4F6; --muted: #9CA3AF; --border: #374151; --accent: #F2540B; }
}
:root[data-theme="dark"] { --bg: #111827; --surface: #1F2937; --text: #F3F4F6; --muted: #9CA3AF; --border: #374151; --accent: #F2540B; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 "Space Grotesk", system-ui, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 48px max(16px, env(safe-area-inset-left)) 64px; }
header .kicker { font: 12px/1 "DM Mono", ui-monospace, monospace; letter-spacing: .22em; text-transform: uppercase; color: var(--accent); }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.1; margin: 12px 0 8px; }
h2 { font-size: 22px; margin: 40px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 4px; }
p, li { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px; margin: 18px 0; }
nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 18px; font: 14px "DM Mono", ui-monospace, monospace; }
footer { margin-top: 56px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--border); padding-top: 16px; }
code { font: 14px "DM Mono", ui-monospace, monospace; }