/* Chapel Hill Math Circle — site styles.
   Palette derives from the migration proposal:
   warm paper ground, slate ink, chalk-teal accent. */

:root {
  --paper: #f5f2ea;
  --paper-2: #ece7db;
  --ink: #1a2434;
  --ink-soft: #3a4353;
  --mist: #6b7484;
  --rule: #d9d3c5;
  --accent: #2f6f74;
  --accent-soft: #cfe3e0;
  --cancel: #a15353;
  --focus: #b6572a;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14181f;
    --paper-2: #1c2129;
    --ink: #ece6d6;
    --ink-soft: #c4bfb1;
    --mist: #8891a0;
    --rule: #2a303a;
    --accent: #6dbdc4;
    --accent-soft: #24494c;
    --cancel: #d68686;
    --focus: #e79b70;
  }
}
:root[data-theme="dark"] {
  --paper: #14181f;
  --paper-2: #1c2129;
  --ink: #ece6d6;
  --ink-soft: #c4bfb1;
  --mist: #8891a0;
  --rule: #2a303a;
  --accent: #6dbdc4;
  --accent-soft: #24494c;
  --cancel: #d68686;
  --focus: #e79b70;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
a:hover { border-bottom-color: var(--accent); }
a:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  padding: 8px 12px; background: var(--ink); color: var(--paper);
}
.skip:focus { left: 12px; top: 12px; z-index: 10; }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}
.header-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 24px;
  flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--ink); border: none;
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.005em;
}
.brand:hover { color: var(--accent); }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 50%;
  font-size: 18px;
}
.brand-name { line-height: 1; }

.nav-toggle {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  font: inherit;
  padding: 6px 12px;
  border-radius: 3px;
  cursor: pointer;
  display: none;
}
.site-nav { margin-left: auto; }
.site-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 4px 16px;
  font-size: 14.5px;
}
.site-nav a {
  color: var(--ink-soft);
  border: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--accent); border-bottom-color: var(--accent-soft); }
.site-nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

@media (max-width: 780px) {
  .nav-toggle { display: inline-block; }
  .site-nav { flex-basis: 100%; display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a { display: block; padding: 10px 0; border-bottom: 1px solid var(--rule); }
}

.main { padding: 48px 24px 72px; }

.page h1 {
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: clamp(28px, 4.5vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  text-wrap: balance;
}
.eyebrow {
  font-family: "Fraunces", serif;
  font-style: italic;
  color: var(--accent);
  letter-spacing: 0.01em;
  margin: 0 0 6px;
  font-size: 15px;
}
.lede {
  font-family: "Fraunces", serif;
  font-size: 20px;
  line-height: 1.45;
  color: var(--ink);
  font-weight: 400;
  margin: 0 0 24px;
  max-width: 60ch;
}
.prose { max-width: 66ch; }
.prose h2 {
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: 24px;
  margin: 40px 0 12px;
  letter-spacing: -0.005em;
  text-wrap: balance;
}
.prose h3 {
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: 19px;
  margin: 28px 0 8px;
}
.prose p, .prose li { color: var(--ink-soft); }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 8px 0 18px; padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose blockquote {
  margin: 18px 0;
  padding: 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--ink);
  font-family: "Fraunces", serif;
  font-style: italic;
  background: var(--paper-2);
}
.prose hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 32px 0;
}
.prose strong { color: var(--ink); }

/* Home-specific */
.home-groups {
  overflow-x: auto;
  margin: 24px 0;
}
.home-groups table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15.5px;
}
.home-groups th, .home-groups td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.home-groups thead th {
  font-family: "Fraunces", serif;
  font-weight: 500;
  color: var(--accent);
  border-bottom: 2px solid var(--accent-soft);
}
.puzzles {
  background: var(--paper-2);
  padding: 20px 24px;
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  margin: 32px 0;
}
.puzzles h2 { margin-top: 0; }

/* Season table */
.season .rooms-list {
  padding-left: 20px;
}
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--paper-2);
  margin: 16px 0 24px;
}
.schedule-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14.5px;
}
.schedule-table th, .schedule-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.schedule-table thead th {
  font-family: "Fraunces", serif;
  font-weight: 500;
  color: var(--accent);
  background: var(--paper);
  font-size: 13.5px;
}
.schedule-table tbody th.date-cell {
  font-family: "Source Sans 3", sans-serif;
  font-weight: 600;
  color: var(--ink);
  width: 110px;
  white-space: nowrap;
}
.date-main { display: block; }
.date-note {
  display: block;
  font-family: "Fraunces", serif;
  font-style: italic;
  font-weight: 400;
  font-size: 12.5px;
  color: var(--mist);
  margin-top: 2px;
}
.schedule-table td { color: var(--ink-soft); }
.schedule-table td a { color: var(--accent); }
.leader { display: block; color: var(--mist); font-size: 13px; margin-top: 2px; }
.cancel {
  color: var(--cancel);
  font-family: "Fraunces", serif;
  font-style: italic;
  text-align: center;
}
.schedule-table tr:last-child th, .schedule-table tr:last-child td { border-bottom: none; }

.season-index {
  columns: 2;
  column-gap: 32px;
  margin: 20px 0;
  padding-left: 20px;
}
@media (max-width: 520px) { .season-index { columns: 1; } }

.site-foot {
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
  margin-top: 48px;
}
.foot-row {
  padding: 22px 24px;
  color: var(--mist);
  font-size: 14px;
  display: flex; flex-wrap: wrap; gap: 6px 24px; justify-content: space-between;
}
.foot-row p { margin: 0; }
.foot-row a { color: var(--mist); }
.foot-row a:hover { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}