:root {
  --bg: #0f1419; --surface: #182029; --border: #2a3542; --text: #e6edf3; --muted: #8b98a5;
  --accent: #2f81f7; --accent-text: #fff; --danger: #da3633; --ok: #2ea043; --warn: #d29922;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f6f8fa; --surface: #fff; --border: #d0d7de; --text: #1f2328; --muted: #59636e; color-scheme: light; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif; }
a { color: var(--accent); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface); }
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 64px; }
.footer { max-width: 1100px; margin: 0 auto; padding: 0 16px 32px; font-size: 13px; color: var(--muted, #666); }
.footer a { color: inherit; }
.legal { max-width: 760px; line-height: 1.7; }
.legal h2 { margin-top: 28px; font-size: 18px; }
.legal ul { padding-left: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 20px; }
.card.narrow { max-width: 520px; margin-left: auto; margin-right: auto; }
.hero { text-align: center; padding: 64px 0; }
.hero h1 { font-size: 40px; margin: 0 0 8px; }
.lead { font-size: 18px; color: var(--muted); }
.muted { color: var(--muted); font-weight: normal; }
label { display: block; margin: 14px 0 4px; font-weight: 600; }
label.check { font-weight: normal; display: flex; gap: 8px; align-items: center; }
input, select { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 10px; width: 100%; }
input[type=checkbox] { width: auto; }
input.num { width: 80px; }
.row { display: flex; gap: 8px; align-items: center; margin: 12px 0; }
.row.compact { margin: 0; }
.row.compact input, .row.compact select { width: auto; }
.inline { display: inline; }
.btn { display: inline-block; font: inherit; border: 1px solid var(--border); background: var(--bg); color: var(--text);
  padding: 7px 14px; border-radius: 6px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-lg { padding: 12px 24px; font-size: 17px; margin-top: 12px; }
.btn-small { padding: 3px 10px; font-size: 13px; }
button.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
form button.btn { margin-top: 0; }
form > .btn-primary { margin-top: 18px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; border: 1px solid var(--border); }
.flash-success { border-color: var(--ok); }
.flash-error { border-color: var(--danger); }
.flash-info { border-color: var(--accent); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; }
tr.highlight td { background: color-mix(in srgb, var(--accent) 12%, transparent); }
code { font-size: 13px; word-break: break-all; }
.copyable { cursor: copy; }
.copyable.copied { outline: 1px solid var(--ok); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--border); }
.badge-active { border-color: var(--ok); color: var(--ok); }
.badge-banned, .badge-revoked { border-color: var(--danger); color: var(--danger); }
.badge-expired { color: var(--muted); }
.badge-used { border-color: var(--warn); color: var(--warn); }
.profile { display: flex; gap: 20px; align-items: center; }
.profile h1 { margin: 0; }
.avatar { width: 80px; height: 80px; border-radius: 50%; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 2px 16px; margin: 8px 0 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
@media (max-width: 640px) { .row { flex-wrap: wrap; } .profile { flex-direction: column; align-items: flex-start; } }
.card-page { background: transparent; }
.card-page .card { margin: 0; }
/* Phase 2 */
.avatar-sm { width: 40px; height: 40px; border-radius: 50%; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.badge-self { border-color: var(--warn); color: var(--warn); }
.badge-demo { border-color: var(--muted); color: var(--muted); }
.metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin: 12px 0; }
.metrics div { border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; }
.metrics dt { color: var(--muted); font-size: 12px; }
.metrics dd { margin: 2px 0 0; font-size: 20px; font-weight: 600; }
.metrics dd.pos { color: var(--ok); }
.metrics dd.neg { color: var(--danger); }
.chart { margin: 8px 0 0; }
.chart svg { width: 100%; height: 160px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; }
.chart .curve { fill: none; stroke: var(--accent); stroke-width: 2; vector-effect: non-scaling-stroke; }
.chart .zero { stroke: var(--muted); stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.steps li { margin-bottom: 8px; }
.repo-list { list-style: none; padding: 0; margin: 0; }
.repo-list li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.langs { margin: 8px 0 0; }
fieldset.plain { border: 0; padding: 0; margin: 12px 0; }
fieldset.plain legend { font-weight: 600; margin-bottom: 4px; }
/* Phase 3 */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.tabs a { padding: 4px 12px; border: 1px solid var(--border); border-radius: 999px; text-decoration: none; color: var(--text); }
.tabs a.active { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.tabs.small a { font-size: 13px; padding: 2px 10px; }
table.ranking td.rank { font-weight: 700; width: 2em; }
table.ranking tr.top td.rank { color: var(--warn); }
table.ranking td.pos { color: var(--ok); }
table.ranking td.neg { color: var(--danger); }
.small { font-size: 13px; }
.notices { list-style: none; padding: 0; margin: 0; }
.notices li { padding: 6px 0; border-bottom: 1px solid var(--border); }
.support { background: var(--bg); padding: 16px 20px; margin: 0 auto; min-height: 100vh; }
.support h1 { font-size: 22px; margin: 12px 0 4px; }