:root { color-scheme: dark; --bg: #14161a; --card: #1d2128; --accent: #4f9cf9; --text: #e8eaed; --muted: #9aa0a6; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); }
header { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.5rem; background: var(--card); border-bottom: 1px solid #2a2f37; }
header h1 { font-size: 1.2rem; margin: 0; }
header select { margin-left: auto; background: var(--bg); color: var(--text); border: 1px solid #2a2f37; padding: 0.3rem 0.6rem; border-radius: 6px; }
#fetched-at { color: var(--muted); font-size: 0.85rem; }
main { padding: 1.5rem; max-width: 1100px; margin: 0 auto; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.card { background: var(--card); border-radius: 10px; padding: 1rem; }
.card h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 0 0 0.4rem; }
.card p { font-size: 1.5rem; margin: 0; }
#chart-section { background: var(--card); border-radius: 10px; padding: 1rem; margin-bottom: 1.5rem; }
nav#tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
nav#tabs button { background: var(--card); color: var(--text); border: 1px solid #2a2f37; padding: 0.45rem 0.9rem; border-radius: 8px; cursor: pointer; }
nav#tabs button.active { background: var(--accent); color: #0b0d10; border-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; }
th, td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid #2a2f37; font-size: 0.9rem; }
th { color: var(--muted); font-weight: 500; }
tr:last-child td { border-bottom: none; }
#messages-list { list-style: none; padding: 0; }
#messages-list li { background: var(--card); border-radius: 8px; padding: 0.75rem 1rem; margin-bottom: 0.5rem; }
#price-controls { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
#price-controls select { background: var(--bg); color: var(--text); border: 1px solid #2a2f37; padding: 0.35rem 0.6rem; border-radius: 6px; max-width: 420px; }
#price-chart { background: var(--card); border-radius: 10px; padding: 1rem; }
.muted { color: var(--muted); font-size: 0.8rem; }