:root { --ground: #F3F3F1; --card: #FFFFFF; --ink: #141414; --secondary: #5E5E5A; --tomato: #FF5A36; --tomato-text: #C93A1C; --hairline: #E4E4E0; }
@media (prefers-color-scheme: dark) {
  :root { --ground: #0F0F0E; --card: #1C1C1A; --ink: #F3F3F1; --secondary: #A3A39E; --tomato-text: #FF8A6E; --hairline: #2E2E2B; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
header a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 20px; }
nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
nav a { color: var(--secondary); text-decoration: none; }
nav a:hover, nav a[aria-current] { color: var(--ink); }
h1 { font-size: 36px; line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 10px; }
h2 { font-size: 21px; margin: 34px 0 6px; }
.lede { font-size: 19px; color: var(--secondary); margin: 0 0 28px; }
.meta { color: var(--secondary); margin: 0 0 28px; }
.card { background: var(--card); border-radius: 22px; padding: 18px 22px; margin: 20px 0; }
.button { display: inline-block; background: var(--tomato); color: #141414; font-weight: 650; text-decoration: none; padding: 13px 22px; border-radius: 999px; }
a { color: var(--tomato-text); }
ul { padding-left: 22px; }
details { border-top: 1px solid var(--hairline); padding: 14px 0; }
details:last-of-type { border-bottom: 1px solid var(--hairline); }
summary { cursor: pointer; font-weight: 600; }
footer { margin-top: 48px; color: var(--secondary); font-size: 14px; }
@media (max-width: 480px) { h1 { font-size: 30px; } nav { gap: 12px; } }