:root {
  --bg: #0e1726;
  --bg-2: #08101c;
  --surface: #152236;
  --line: #24354f;
  --text: #ecf0f8;
  --muted: #a0acc0;
  --accent: #8ab4f8;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: linear-gradient(var(--bg), var(--bg-2)) fixed;
  color: var(--text);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  line-height: 1.8;
  font-size: 16px;
}
a { color: var(--accent); }
.top {
  position: sticky; top: 0; z-index: 1;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px;
  padding: 12px 16px;
  background: rgba(14, 23, 38, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand img { border-radius: 8px; }
.top nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; padding: 2px 0; }
.top nav a[aria-current="page"] { color: var(--accent); border-bottom: 2px solid var(--accent); }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 28px; line-height: 1.4; margin: 8px 0 16px; }
h2 { font-size: 20px; margin: 36px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
h3 { font-size: 17px; margin: 24px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
ul, ol { padding-left: 1.4em; }
li { margin: 4px 0; }
code { background: var(--surface); padding: 1px 6px; border-radius: 4px; font-size: 0.92em; }
.note { background: var(--surface); border-left: 3px solid var(--accent); padding: 10px 14px; border-radius: 6px; margin: 0 0 16px; color: var(--text); }
.table { overflow-x: auto; margin: 0 0 16px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
td:first-child { white-space: nowrap; font-weight: 600; }
.release h2 { display: flex; align-items: baseline; gap: 12px; }
.release .date { font-size: 14px; font-weight: 400; color: var(--muted); }
footer { border-top: 1px solid var(--line); padding: 16px; text-align: center; font-size: 13px; color: var(--muted); }
@media (max-width: 480px) {
  h1 { font-size: 24px; }
  td:first-child { white-space: normal; }
}