:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-hover: #1f262e;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --red: #f85149;
  --yellow: #d29922;
  --orange: #db8a3c;
  --blue: #1f6feb;
  --mono: 'SF Mono', 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
#root { max-width: 1400px; margin: 0 auto; padding: 20px; }

.muted { color: var(--text-muted); }
.small { font-size: 12px; }
.mono { font-family: var(--mono); }

.green { color: var(--green); }
.red { color: var(--red); }
.yellow { color: var(--yellow); }
.orange { color: var(--orange); }
.blue { color: var(--accent); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── header ─────────────────────────────────── */
header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 20px;
}
header h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 14px 0;
  letter-spacing: -0.3px;
}
header h1 .muted { font-weight: 400; }

.tagline {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.65;
  margin: 8px 0 18px 0;
  max-width: 950px;
}
.tagline strong { color: var(--text); font-weight: 600; }

.header-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

/* ── hero (backing data) ───────────────────── */
.panel.hero {
  background: linear-gradient(135deg, #161b22 0%, #1a2332 100%);
  border-color: #30363d;
}
.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}
.hero-card {
  background: rgba(13, 17, 23, 0.7);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  position: relative;
}
.hero-rank {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}
.hero-coin {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.5px;
}
.hero-stat {
  font-family: var(--mono);
  font-size: 15px;
  margin-top: 4px;
  color: var(--text);
}
.hero-stat strong {
  color: var(--green);
  font-size: 18px;
  font-weight: 600;
}
.hero-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.5;
}
.stat {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
}
.stat-label {
  font-size: 10px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}
.stat-val {
  font-size: 18px;
  font-family: var(--mono);
  margin-top: 2px;
}

/* ── panels ─────────────────────────────────── */
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
}
.panel h2 {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 12px 0;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
}

/* ── tables ─────────────────────────────────── */
.table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12.5px;
}
.table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.table td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border-muted);
}
.table tbody tr:hover {
  background: var(--bg-hover);
}
.table td.right, .table th.right { text-align: right; }

/* ── spread grid ────────────────────────────── */
.spread-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 10px;
}
.spread-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 12px;
  position: relative;
}
.spread-card.held {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(88, 166, 255, 0.2);
}
.spread-card.disabled {
  opacity: 0.4;
}
.spread-card .coin {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  font-family: -apple-system, sans-serif;
}
.spread-card .row {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
}
.spread-card .signal {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.signal.READY { color: var(--green); }
.signal.HELD  { color: var(--accent); }
.signal.watch { color: var(--yellow); }

/* spread bar */
.spread-bar {
  margin-top: 8px;
  height: 4px;
  background: var(--border-muted);
  border-radius: 2px;
  position: relative;
}
.spread-bar .marker {
  position: absolute;
  top: -3px;
  width: 2px;
  height: 10px;
  background: var(--text);
}
.spread-bar .threshold {
  position: absolute;
  top: -2px;
  width: 1px;
  height: 8px;
  background: var(--yellow);
  opacity: 0.6;
}

/* ── events ────────────────────────────────── */
.events { list-style: none; padding: 0; margin: 0; font-family: var(--mono); font-size: 12px; }
.events li { padding: 4px 0; border-bottom: 1px solid var(--border-muted); }
.events li:last-child { border-bottom: none; }
.events .level-error { color: var(--red); }
.events .level-warning { color: var(--yellow); }
.events .level-open { color: var(--green); }
.events .level-close { color: var(--accent); }
.events .level-info { color: var(--text-muted); }

/* ── toggles ───────────────────────────────── */
.toggle {
  cursor: pointer;
  display: inline-block;
  width: 38px;
  height: 22px;
  background: var(--border);
  border-radius: 11px;
  position: relative;
  transition: background 0.15s;
}
.toggle.on { background: var(--green); }
.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 9px;
  transition: left 0.15s;
}
.toggle.on::after { left: 18px; }

/* ── footer ────────────────────────────────── */
footer {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px solid var(--border-muted);
  text-align: center;
}

/* ── pulse animation for live indicators ───── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.live-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 3px;
  background: var(--green);
  animation: pulse 1.5s ease-in-out infinite;
  margin-right: 6px;
  vertical-align: middle;
}