/* Quant Dashboard — Dark Theme */
:root {
  --bg: #0d1117;
  --surface: #1a1a2e;
  --border: #30363d;
  --text: #e0e0e0;
  --text-muted: #8b949e;
  --accent: #4fc3f7;
  --green: #66bb6a;
  --red: #f44336;
  --yellow: #ffa726;
}

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

/* Tab Navigation */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}
.tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1em;
  padding: 12px 24px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  padding: 0 16px;
  max-width: 1200px;
  margin: 0 auto;
}

header {
  text-align: center;
  padding: 40px 0 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 30px;
}
header h1 { font-size: 1.8em; color: var(--accent); }
.subtitle { color: var(--text-muted); font-size: 0.95em; }
.meta { color: var(--text-muted); font-size: 0.85em; margin-top: 8px; }

section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}
section h2 {
  font-size: 1.2em;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* Info bar */
.info-bar {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85em;
  font-weight: 600;
}
.badge-green { background: rgba(102,187,106,0.2); color: var(--green); }
.badge-yellow { background: rgba(255,167,38,0.2); color: var(--yellow); }
.badge-red { background: rgba(244,67,54,0.2); color: var(--red); }
.stat { color: var(--text-muted); font-size: 0.9em; }

/* Tables */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9em;
}
th {
  text-align: left;
  padding: 10px 12px;
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
th::after { content: ' \2195'; opacity: 0.3; font-size: 0.8em; }
th.sort-asc::after { content: ' \2191'; opacity: 1; }
th.sort-desc::after { content: ' \2193'; opacity: 1; }
td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
tr:hover { background: rgba(255,255,255,0.03); }
.symbol { font-weight: 700; }
.symbol a { color: var(--accent); text-decoration: none; }
.symbol a:hover { text-decoration: underline; }
.positive { color: var(--green); }
.negative { color: var(--red); }

/* Metric cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.card-value {
  font-size: 1.4em;
  font-weight: 700;
}
.card-label {
  font-size: 0.8em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Charts */
.chart { margin-bottom: 16px; }
.chart-small { height: 200px; }

/* Trade history */
.trade-group {
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.trade-group summary {
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
  background: rgba(255,255,255,0.03);
  border-radius: 6px;
}
.trade-group summary:hover { background: rgba(255,255,255,0.06); }
.trade-group[open] summary { border-bottom: 1px solid var(--border); border-radius: 6px 6px 0 0; }
.trade-table { font-size: 0.85em; }
.trade-table .buy td:first-child { color: var(--green); }
.trade-table .sell td:first-child { color: var(--red); }

/* Error & empty */
.error { color: var(--red); padding: 40px; text-align: center; }
.error code { background: rgba(255,255,255,0.1); padding: 2px 8px; border-radius: 4px; }
.empty { color: var(--text-muted); text-align: center; padding: 20px; }

/* Footer */
footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8em;
  padding: 20px 0 40px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

/* Strategy cross-navigation */
.strategy-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  margin-bottom: 0;
  font-size: 0.85em;
  color: var(--text-muted);
}
.strategy-nav a {
  color: var(--accent);
  text-decoration: none;
}
.strategy-nav a:hover {
  text-decoration: underline;
}
.strategy-nav-current {
  font-weight: 600;
  color: var(--text);
}

/* Mobile */
@media (max-width: 600px) {
  header h1 { font-size: 1.3em; }
  section { padding: 16px; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .card-value { font-size: 1.1em; }
}