:root {
  --bg: #0b1220;
  --bg-alt: #131c2e;
  --text: #e8ecf4;
  --text-dim: #9aa7bd;
  --accent: #d4af37;
  --up: #4caf7d;
  --down: #e0625c;
  --border: #223047;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --bg-alt: #ffffff;
    --text: #131c2e;
    --text-dim: #5b6474;
    --accent: #a8791f;
    --border: #e1e5ee;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent);
  color: #0b1220;
  font-weight: 700;
}

.brand-text { font-size: 1.05rem; }

.pill {
  font-size: 0.75rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
}

.hero {
  padding: 40px 0 20px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 8px;
}

.subtitle {
  color: var(--text-dim);
  margin: 0 0 20px;
}

.update-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

#refresh-btn {
  background: var(--accent);
  color: #0b1220;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-weight: 600;
  cursor: pointer;
}

#refresh-btn:hover { opacity: 0.9; }

.status {
  min-height: 1.4em;
  color: var(--down);
  text-align: center;
  margin-bottom: 12px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 40px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-alt);
  min-width: 560px;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

tbody tr:last-child td { border-bottom: none; }

.rate-buy { color: var(--up); font-weight: 600; }
.rate-sell { color: var(--down); font-weight: 600; }

.explainer {
  padding: 20px 0 10px;
  border-top: 1px solid var(--border);
}

.explainer h2 { font-size: 1.2rem; margin: 24px 0 8px; }
.explainer p { color: var(--text-dim); margin: 0 0 8px; }

.disclaimer {
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  padding: 20px 0 40px;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}