:root {
  --bg: #ffffff;
  --text: #1a1a2e;
  --muted: #555;
  --accent: #2563eb;
  --border: #e2e8f0;
  --card-bg: #f8fafc;
  --ticker-bg: #eef2ff;
  --ticker-text: #3730a3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: #60a5fa;
    --border: #334155;
    --card-bg: #1e293b;
    --ticker-bg: #1e1b4b;
    --ticker-text: #a5b4fc;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

header { margin-bottom: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 1rem; }
header h1 a { color: var(--text); text-decoration: none; }
header .subtitle { color: var(--muted); margin-top: 0.25rem; }

h2 { margin: 2rem 0 1rem; }
h3 { margin-bottom: 0.25rem; }

a { color: var(--accent); }

.categories { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.category-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}
.category-card .description { color: var(--muted); font-size: 0.875rem; margin-bottom: 0.5rem; }
.category-card .count { color: var(--muted); font-size: 0.8rem; margin-top: 0.5rem; }

.ticker {
  display: inline-block;
  background: var(--ticker-bg);
  color: var(--ticker-text);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  margin: 0.1rem;
  font-family: monospace;
  transition: opacity 0.15s, transform 0.15s;
}
.ticker-highlighted {
  opacity: 1;
  transform: scale(1.05);
  box-shadow: 0 0 0 2px var(--accent);
}
.ticker-dimmed { opacity: 0.25; }

table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); }
th { font-weight: 600; font-size: 0.875rem; color: var(--muted); }
td { font-size: 0.9rem; }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* Exchange categories (single column, collapsible) */
.exchange-categories { display: flex; flex-direction: column; gap: 0.5rem; }
.exchange-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.exchange-card details { padding: 0.75rem 1rem; }
.exchange-card summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
}
.exchange-card summary::-webkit-details-marker { display: none; }
.exchange-card summary::before {
  content: "\25B6";
  font-size: 0.6rem;
  color: var(--muted);
  transition: transform 0.15s;
}
.exchange-card details[open] summary::before { transform: rotate(90deg); }
.exchange-card summary .count {
  color: var(--muted);
  font-size: 0.8rem;
  margin-left: auto;
}
.exchange-card .tickers { margin-top: 0.75rem; }
.exchange-card > .watchlist-downloads { margin: 0 1rem 0.75rem; }

/* Watchlist download links */
.watchlist-downloads { margin-top: 0.75rem; border-top: 1px solid var(--border); padding-top: 0.5rem; }
.dl-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem; margin-bottom: 0.25rem; }
.dl-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  min-width: 5rem;
}
.dl-link {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.dl-link:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.85rem; }