:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --border: #e0ddd5;
  --text: #1f2320;
  --text-dim: #6b6f6a;
  --accent: #3b6e5e;
  --accent-soft: #e8f0ec;
  --tag-group: #8a4b2e;
  --tag-group-bg: #f7e9de;
  --tag-meet: #7a3b8f;
  --tag-meet-bg: #f1e4f7;
  --tag-coauthor: #2e5f8a;
  --tag-coauthor-bg: #e2edf7;
  --tag-topic: #3b6e5e;
  --tag-topic-bg: #e3efe9;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16181a;
    --surface: #1f2225;
    --border: #33383c;
    --text: #eceeec;
    --text-dim: #9aa09b;
    --accent: #6fbf9f;
    --accent-soft: #223530;
    --tag-group: #e8b493;
    --tag-group-bg: #3a2a1e;
    --tag-meet: #d7aee8;
    --tag-meet-bg: #352a3a;
    --tag-coauthor: #9dc4ec;
    --tag-coauthor-bg: #202d3a;
    --tag-topic: #8fd6b7;
    --tag-topic-bg: #1d332a;
    --shadow: 0 1px 3px rgba(0,0,0,0.4);
  }
}
:root[data-theme="dark"] {
  --bg: #16181a;
  --surface: #1f2225;
  --border: #33383c;
  --text: #eceeec;
  --text-dim: #9aa09b;
  --accent: #6fbf9f;
  --accent-soft: #223530;
  --tag-group: #e8b493;
  --tag-group-bg: #3a2a1e;
  --tag-meet: #d7aee8;
  --tag-meet-bg: #352a3a;
  --tag-coauthor: #9dc4ec;
  --tag-coauthor-bg: #202d3a;
  --tag-topic: #8fd6b7;
  --tag-topic-bg: #1d332a;
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.45;
  padding-bottom: 3rem;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 1rem; }

header.top {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0 0.5rem;
}
header.top h1 {
  font-size: 1.15rem;
  margin: 0 0 0.6rem;
  font-weight: 700;
}
header.top h1 span { color: var(--accent); }

.tabs {
  display: flex; gap: 0.4rem; margin-bottom: 0.6rem;
}
.tab-btn {
  flex: 1;
  padding: 0.5rem 0.4rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}
.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#search-box {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}
#search-box:focus { outline: 2px solid var(--accent); }

.filters {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
  margin-top: 0.5rem;
}
.filter-chip {
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.78rem;
  cursor: pointer;
  user-select: none;
}
.filter-chip.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

main { padding-top: 0.75rem; }

.result-count { color: var(--text-dim); font-size: 0.8rem; margin: 0.4rem 0 0.6rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.6rem;
  box-shadow: var(--shadow);
}
.card .meta {
  font-size: 0.76rem;
  color: var(--text-dim);
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-bottom: 0.25rem;
}
.card .kind-badge {
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 700;
  color: var(--accent);
}
.card h3 {
  margin: 0.1rem 0 0.25rem;
  font-size: 1rem;
  line-height: 1.3;
}
.card .speaker { font-size: 0.88rem; color: var(--text-dim); }
.card .tags { margin-top: 0.4rem; display: flex; flex-wrap: wrap; gap: 0.3rem; }
.pill {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}
.pill.group { color: var(--tag-group); background: var(--tag-group-bg); }
.pill.meet { color: var(--tag-meet); background: var(--tag-meet-bg); }
.pill.coauthor { color: var(--tag-coauthor); background: var(--tag-coauthor-bg); }
.pill.topic { color: var(--tag-topic); background: var(--tag-topic-bg); }

.card .body-text {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--text);
  white-space: pre-line;
}
.card .why {
  margin-top: 0.45rem;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
}
.card .conflict {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-left: 3px solid var(--border);
  padding-left: 0.5rem;
}

.day-heading {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 1.3rem 0 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--accent);
}
.day-heading:first-child { margin-top: 0.3rem; }

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

.caveats {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  margin-bottom: 0.8rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.caveats summary { cursor: pointer; font-weight: 600; color: var(--text); }
.caveats ul { margin: 0.5rem 0 0; padding-left: 1.1rem; }

footer.site-footer {
  max-width: 720px; margin: 2rem auto 0; padding: 1rem;
  color: var(--text-dim); font-size: 0.75rem; text-align: center;
}
a { color: var(--accent); }