:root { color-scheme: dark; font: 16px/1.7 system-ui, sans-serif; background: #070a12; color: #e2e8f0; }
* { box-sizing: border-box; }
body { margin: 0; }
a { color: #38bdf8; text-underline-offset: 3px; }
a:hover { color: #e0f2fe; }
header, footer { background: #0f172a; border-bottom: 1px solid #334155; padding: 20px max(20px, calc((100% - 1000px) / 2)); }
header { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav a[aria-current="page"] { color: #f8fafc; font-weight: 700; }
main { max-width: 1000px; padding: 30px 20px 50px; margin: auto; }
h1, h2 { color: #f8fafc; line-height: 1.3; }
h1 { font-size: clamp(32px, 6vw, 48px); margin-bottom: 12px; }
h2 { margin-top: 32px; font-size: 23px; }
.intro { color: #94a3b8; font-size: 19px; }
.date { color: #94a3b8; font-size: 14px; }
.notice { border-left: 4px solid #38bdf8; padding: 15px 20px; background: #0f172a; border-radius: 4px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.card { border: 1px solid #334155; border-radius: 12px; padding: 20px; background: #0f172a; }
.card h2 { margin-top: 0; }
footer { border-top: 1px solid #334155; border-bottom: 0; color: #94a3b8; font-size: 14px; }