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

:root {
  --bg: #0f1117;
  --fg: #e1e4e8;
  --heading: #f0f3f6;
  --card-bg: #161b22;
  --card-border: #30363d;
  --muted: #8b949e;
  --grid: #21262d;
}

[data-theme="light"] {
  --bg: #ffffff;
  --fg: #1f2328;
  --heading: #1f2328;
  --card-bg: #f6f8fa;
  --card-border: #d1d9e0;
  --muted: #656d76;
  --grid: #e8eaed;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

.dashboard {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--heading);
}

.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--fg);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--muted);
}

.chart-container {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.chart-container h2 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 1rem;
}

.controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

button {
  background: #238636;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

button:hover {
  background: #2ea043;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  font-size: 0.875rem;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
}

.stat-card .value {
  font-size: 1.75rem;
  font-weight: 700;
}

.stat-card .label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  white-space: nowrap;
}

th, td {
  padding: 0.5rem 0.75rem;
  text-align: right;
  border-bottom: 1px solid var(--card-border);
}

th:first-child, td:first-child {
  text-align: left;
}

th {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.pct {
  color: var(--muted);
  font-size: 0.75rem;
}