:root {
  --bg: #ffffff;
  --fg: #14181f;
  --muted: #4a5360;
  --line: #c9cfd8;
  --card: #f5f7fa;
  --accent: #0b4fd1;
  --accent-fg: #ffffff;
  --danger: #a4161a;
  --ok-bg: #e6f4ea;
  --warn-bg: #fff4d6;
  --focus: #b45309;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1319;
    --fg: #f1f4f8;
    --muted: #b4bdc9;
    --line: #3a4350;
    --card: #181e27;
    --accent: #7ab0ff;
    --accent-fg: #0a0f18;
    --danger: #ff8d8d;
    --ok-bg: #153322;
    --warn-bg: #3a2f0e;
    --focus: #ffcf66;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1.0625rem/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
main.wrap { padding-top: 1.25rem; padding-bottom: 2.5rem; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.25rem; line-height: 1.3; margin: 1.75rem 0 0.5rem; }
p { margin: 0.5rem 0 0.75rem; }
a { color: var(--accent); text-underline-offset: 0.15em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--bg); padding: 0.75rem 1rem; z-index: 10; }
.skip:focus { left: 0.5rem; top: 0.5rem; }

.site-header { border-bottom: 1px solid var(--line); }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.25rem 1rem; }
.brand { font-weight: 700; font-size: 1.2rem; color: var(--fg); text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.nav { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0 0.25rem; }
.nav a, .link-button { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; padding: 0 0.6rem; }
.nav form { margin: 0; }
.link-button { background: none; border: 0; color: var(--accent); font: inherit; text-decoration: underline; cursor: pointer; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.95rem; padding: 1rem 0 2rem; }
.site-footer a { display: inline-block; min-height: 24px; }

.lead { font-size: 1.15rem; color: var(--muted); }
.meta, .hint { color: var(--muted); font-size: 0.95rem; }
.hero { padding: 1rem 0 0.5rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 0.6rem; padding: 0.25rem 1rem 1rem; margin: 1rem 0; }
.card h2 { margin-top: 0.75rem; }
.body-text { white-space: pre-line; }
.schedule { display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem 1rem; margin: 0.5rem 0; }
.schedule dt { color: var(--muted); }
.schedule dd { margin: 0; font-variant-numeric: tabular-nums; }
code { font-size: 0.95em; background: var(--card); padding: 0.1em 0.35em; border-radius: 0.25rem; overflow-wrap: anywhere; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0.5rem 1.25rem; border: 2px solid var(--accent); border-radius: 0.5rem; background: var(--accent); color: var(--accent-fg); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.button.secondary { background: transparent; color: var(--accent); }
.danger-button { background: var(--danger); border-color: var(--danger); color: var(--bg); }
.button:hover { filter: brightness(1.1); }

form { margin: 0.5rem 0; }
.field { margin: 1.25rem 0; border: 0; padding: 0; min-width: 0; }
label, legend { display: block; font-weight: 600; margin-bottom: 0.25rem; padding: 0; }
.field .hint { margin: 0 0 0.35rem; }
input[type="text"], input[type="tel"] { width: 100%; min-height: 44px; padding: 0.5rem 0.75rem; font: inherit; color: var(--fg); background: var(--bg); border: 2px solid var(--line); border-radius: 0.5rem; }
.has-error input[type="text"], .has-error input[type="tel"] { border-color: var(--danger); }
.choice { display: flex; align-items: flex-start; gap: 0.6rem; min-height: 44px; padding: 0.25rem 0; }
.choice input { width: 1.5rem; height: 1.5rem; margin: 0.2rem 0 0; flex: none; accent-color: var(--accent); }
.choice label { font-weight: 400; margin: 0; padding-top: 0.15rem; }
.error { color: var(--danger); font-weight: 600; margin: 0 0 0.35rem; }
.error-box { border: 2px solid var(--danger); border-radius: 0.5rem; padding: 0.5rem 1rem; margin: 1rem 0; }
.error-box ul { margin: 0.25rem 0 0.5rem; padding-left: 1.25rem; }
.error-box a { color: var(--danger); }
.notice { background: var(--ok-bg); border: 1px solid var(--line); border-radius: 0.5rem; padding: 0.6rem 1rem; }
.invite { background: var(--warn-bg); border: 2px solid var(--focus); border-radius: 0.6rem; padding: 0.25rem 1rem 0.5rem; margin: 1rem 0; }
.status { text-transform: capitalize; }
.danger { border-top: 1px solid var(--line); margin-top: 2rem; }
.error-page { padding: 2rem 0; }

@media (min-width: 40rem) {
  body { font-size: 1.125rem; }
  h1 { font-size: 2.1rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }