:root {
  color-scheme: dark;
  --bg: #0f1118;
  --panel: #181b26;
  --text: #f7f7fb;
  --muted: #b8bdcc;
  --primary: #9f96ff;
  --border: #30354a;
  --notice: #252147;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--primary); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px max(20px, calc((100% - 900px) / 2));
  background: rgb(15 17 24 / 94%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}
.brand { color: var(--text); font-size: 1.2rem; font-weight: 800; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
nav a { color: var(--muted); font-size: .9rem; text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { max-width: 900px; margin: auto; padding: 56px 20px 80px; }
.hero { max-width: 720px; margin-bottom: 36px; }
.hero h1 { margin: 4px 0 12px; font-size: clamp(2rem, 6vw, 3.5rem); line-height: 1.12; }
.hero > p:not(.eyebrow):not(.date) { color: var(--muted); font-size: 1.1rem; }
.eyebrow { margin: 0; color: var(--primary); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.date { color: var(--muted); font-size: .9rem; }
.notice { margin: 0 0 24px; padding: 20px 22px; background: var(--notice); border: 1px solid #4a4386; border-radius: 16px; }

article { padding: 24px 32px; background: var(--panel); border: 1px solid var(--border); border-radius: 20px; }
h2 { margin-top: 34px; line-height: 1.3; }
h2:first-child { margin-top: 0; }
p, li { color: var(--muted); }
strong { color: var(--text); }
li + li { margin-top: 8px; }
.compact li + li { margin-top: 2px; }

footer { padding: 32px 20px; color: var(--muted); text-align: center; border-top: 1px solid var(--border); }

@media (max-width: 720px) {
  .site-header { align-items: flex-start; flex-direction: column; gap: 8px; }
  nav { gap: 6px 14px; }
  main { padding-top: 38px; }
  article { padding: 22px 20px; }
}