:root {
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --success: #16a34a;
  --warning: #ea580c;
  --rank-1: #fbbf24;
  --rank-2: #94a3b8;
  --rank-3: #d97706;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --accent: #3b82f6;
    --accent-light: #1e3a5f;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 0;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

header h1 span {
  color: var(--accent);
}

header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.meta-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 0.85rem;
}

.meta-item strong {
  color: var(--accent);
}

.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.filters label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.filters select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead {
  background: var(--bg-secondary);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  border-bottom: 2px solid var(--border);
  position: relative;
}

th:hover {
  color: var(--accent);
}

th.sorted-asc::after {
  content: " ▲";
  font-size: 0.7rem;
}

th.sorted-desc::after {
  content: " ▼";
  font-size: 0.7rem;
}

th.text-right,
td.text-right {
  text-align: right;
}

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

tbody tr:hover {
  background: var(--accent-light);
}

.rank-cell {
  font-weight: 700;
  font-size: 1.1rem;
  width: 40px;
  text-align: center;
}

.rank-1 { color: var(--rank-1); }
.rank-2 { color: var(--rank-2); }
.rank-3 { color: var(--rank-3); }

.loop-name {
  font-weight: 600;
}

.score-bar {
  display: inline-block;
  height: 6px;
  border-radius: 3px;
  background: var(--accent);
  vertical-align: middle;
  margin-left: 8px;
  opacity: 0.6;
}

.metric-good { color: var(--success); }
.metric-warn { color: var(--warning); }

.composite {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
}

footer {
  text-align: center;
  padding: 40px 0 24px;
  color: var(--text-muted);
  font-size: 0.8rem;
}

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

footer a:hover {
  text-decoration: underline;
}

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  header h1 { font-size: 1.5rem; }
  .meta { gap: 8px; }
  .filters { flex-direction: column; }
  th, td { padding: 8px 10px; font-size: 0.8rem; }
}