:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface-1: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --baseline: #c3c2b7;
  --series-1: #2a78d6;
  --border: rgba(11, 11, 11, 0.10);
  --ball-1: #eda100;
  --ball-2: #2a78d6;
  --ball-3: #e34948;
  --ball-4: #6b6b68;
  --ball-5: #008300;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface-1: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --baseline: #383835;
    --series-1: #3987e5;
    --border: rgba(255, 255, 255, 0.10);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--text-primary);
}

.app-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
}

.app-nav .brand {
  font-weight: 700;
  font-size: 18px;
  margin-right: 8px;
}

.app-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
}

.app-nav a:hover {
  color: var(--text-primary);
  background: var(--gridline);
}

.app-nav a.active {
  color: var(--text-primary);
  font-weight: 600;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 20px;
}

.card h2 {
  margin-top: 0;
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.hero-round {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-date {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.ball-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ball {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.ball.small {
  width: 28px;
  height: 28px;
  font-size: 12px;
}

.ball-plus {
  color: var(--text-muted);
  font-size: 18px;
  margin: 0 2px;
}

.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}

.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.stat-tile .value {
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-tile .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
}

button, .btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
}

button.primary {
  background: var(--series-1);
  border-color: var(--series-1);
  color: #fff;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.freq-chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 160px;
  padding-top: 8px;
  border-bottom: 1px solid var(--baseline);
}

.freq-bar {
  flex: 1;
  min-width: 8px;
  background: var(--series-1);
  border-radius: 3px 3px 0 0;
  position: relative;
  cursor: default;
}

.freq-bar .tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 6px;
  background: var(--text-primary);
  color: var(--page);
  font-size: 11px;
  padding: 4px 7px;
  border-radius: 5px;
  white-space: nowrap;
  z-index: 5;
}

.freq-bar:hover .tooltip {
  display: block;
}

.freq-labels {
  display: flex;
  gap: 3px;
  margin-top: 4px;
}

.freq-labels span {
  flex: 1;
  min-width: 8px;
  text-align: center;
  font-size: 9px;
  color: var(--text-muted);
}

.hbar-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hbar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hbar-row .name {
  width: 90px;
  font-size: 13px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.hbar-track {
  flex: 1;
  background: var(--gridline);
  border-radius: 6px;
  height: 18px;
  overflow: hidden;
  display: flex;
}

.hbar-fill {
  background: var(--series-1);
  height: 100%;
}

.hbar-row .count {
  width: 60px;
  text-align: right;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 640px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}

.pick-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--gridline);
}

.pick-row:last-child {
  border-bottom: none;
}

.pick-index {
  width: 22px;
  color: var(--text-muted);
  font-size: 12px;
}

.pair-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pair-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--page);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px 4px 4px;
  font-size: 12px;
}

.pair-chip .n {
  color: var(--text-muted);
}

.muted {
  color: var(--text-muted);
  font-size: 13px;
}

.mode-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.mode-toggle a {
  padding: 8px 14px;
  font-size: 13px;
  text-decoration: none;
  color: var(--text-secondary);
}

.mode-toggle a.active {
  background: var(--series-1);
  color: #fff;
}

.site-footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.site-footer p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

.intro-text {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}