:root { --bg: #f4f7f5; --fg: #15211d; --muted: #5d6b66; --accent: #2e7d6b; --card: #ffffff; --line: #dbe4e0; }
@media (prefers-color-scheme: dark) { :root { --bg: #111816; --fg: #e8efec; --muted: #9aa9a3; --accent: #6fcfb5; --card: #1a2320; --line: #2c3834; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--fg); }
a { color: var(--accent); }
header, main, footer { max-width: 860px; margin: 0 auto; padding: 0 24px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 24px; }
header img { width: 40px; height: 40px; border-radius: 10px; }
header a.brand { font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
nav a { color: var(--muted); text-decoration: none; }
.hero { text-align: center; padding: 56px 0 24px; }
.hero img.icon { width: 128px; height: 128px; border-radius: 28px; box-shadow: 0 16px 48px rgba(46, 125, 107, .3); }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.1; margin: 24px 0 12px; }
.hero p { color: var(--muted); font-size: 20px; max-width: 620px; margin: 0 auto; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 32px 0 56px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.card h3 { margin: 4px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
article { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 32px; margin: 32px 0; }
article h1 { margin-top: 0; }
article h2 { font-size: 20px; margin-top: 28px; }
.muted { color: var(--muted); }
footer { padding: 32px 24px 48px; color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 16px; }
footer a { color: var(--muted); }