:root {
  --bg: #fbfaf7; --surface: #ffffff; --ink: #1d2433; --muted: #5d6679; --line: #e3e0d8;
  --brand: #2a9d8f; --brand-ink: #ffffff; --accent: #e63946; --warn: #f4a261;
  --radius: 14px; --max: 960px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12151c; --surface: #1a1f2a; --ink: #eceff5; --muted: #a2abbd; --line: #2b3242; --brand: #3dbdae; --brand-ink: #0b1210; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
header.site .wrap { display: flex; align-items: center; gap: 16px; min-height: 56px; flex-wrap: wrap; }
header.site .brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: .01em; }
header.site nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
header.site nav a { padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--muted); }
header.site nav a[aria-current="page"] { color: var(--ink); background: color-mix(in srgb, var(--brand) 14%, transparent); }
header.site .who { color: var(--muted); font-size: .9rem; display: flex; align-items: center; gap: 10px; }
main { padding: 32px 0 64px; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 1.25rem; margin: 32px 0 10px; }
p.lead { font-size: 1.1rem; color: var(--muted); max-width: 60ch; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-top: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0 0 12px; color: var(--muted); }
.btn { display: inline-block; border: 1px solid var(--brand); background: var(--brand); color: var(--brand-ink); padding: 9px 16px; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--brand); }
.btn.small { padding: 5px 10px; font-size: .9rem; }
.btn[disabled] { opacity: .6; cursor: progress; }
form.stack { display: grid; gap: 12px; max-width: 460px; }
label { display: grid; gap: 4px; font-size: .92rem; color: var(--muted); }
input, select, textarea { font: inherit; padding: 9px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); width: 100%; }
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.notice { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); }
.notice.ok { border-color: var(--brand); } .notice.err { border-color: var(--accent); }
.tabs { display: flex; gap: 6px; margin-bottom: 14px; }
.tabs button { background: none; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; color: var(--muted); font: inherit; cursor: pointer; }
.tabs button[aria-pressed="true"] { color: var(--ink); border-color: var(--brand); }
.muted { color: var(--muted); } .small { font-size: .9rem; }
ul.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
ul.plain li { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; }
footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; padding: 18px 0; }
[hidden] { display: none !important; }