:root {
  --ground: #121212; --panel: #1c1c1c; --line: #2e2e2e; --ink: #ededed; --dim: #a0a0a0; --faint: #777;
  --accent: #ededed; --accent-ink: #141414; --good: #4fb477; --warn: #e0a53c; --bad: #e06c60;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root { --ground: #f4f5f7; --panel: #ffffff; --line: #d6dbe1; --ink: #15181c; --dim: #59626b; --faint: #858d96;
    --accent: #1f2937; --accent-ink: #ffffff; --good: #2e7d4f; --warn: #a86b00; --bad: #c0392b; color-scheme: light; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 16px/1.55 "Segoe UI", system-ui, -apple-system, sans-serif; }
a { color: inherit; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 19px; text-decoration: none; letter-spacing: .02em; }
nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
nav a { text-decoration: none; color: var(--dim); }
nav a:hover { color: var(--ink); }
main { max-width: 860px; margin: 0 auto; padding: 28px 20px 48px; }
footer { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; padding: 20px; color: var(--faint); font-size: 13px; border-top: 1px solid var(--line); }
h1 { font-size: 28px; margin: 0 0 14px; }
h2 { font-size: 18px; margin: 0 0 8px; }
.hero { padding: 24px 0 8px; }
.lead { font-size: 19px; color: var(--dim); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 24px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 0 0 16px; }
.cards .card { margin: 0; }
.small { font-size: 14px; color: var(--dim); }
.button, button { display: inline-block; font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--accent-ink); text-decoration: none; cursor: pointer; }
.button.plain, button.plain { background: transparent; color: var(--ink); border-color: var(--line); font-weight: 500; }
button.link { background: none; border: none; padding: 0; color: var(--dim); font-weight: 400; text-decoration: underline; }
form.inline { display: inline; }
form.stack { display: grid; gap: 12px; max-width: 420px; margin: 12px 0; }
form.narrow { max-width: 380px; }
label { display: grid; gap: 4px; color: var(--dim); font-size: 14px; }
input { font: inherit; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--ground); color: var(--ink); }
input:focus { outline: 2px solid var(--dim); outline-offset: 1px; }
.notice { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); }
.notice.bad { border-color: var(--bad); color: var(--bad); }
.notice.good { border-color: var(--good); color: var(--good); }
.notice.warn { border-color: var(--warn); color: var(--warn); }
.state { font-weight: 600; }
.state.good { color: var(--good); }
.state.warn { color: var(--warn); }
.code { font: 700 30px/1.3 Consolas, ui-monospace, monospace; letter-spacing: .06em; background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 18px; display: inline-block; }
.qr img { background: #fff; padding: 10px; border-radius: 10px; }
code { font-family: Consolas, ui-monospace, monospace; background: var(--panel); padding: 2px 6px; border-radius: 6px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 18px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--faint); font-weight: 600; }
.venue .button.plain { margin-left: 6px; }
@media (max-width: 600px) { table { display: block; overflow-x: auto; } h1 { font-size: 24px; } }