:root {
  --bg: #ffffff;
  --fg: #1a1a2e;
  --muted: #6b7280;
  --grid: #e5e7eb;
  --supermajor: #d4a017;
  --major: #2563eb;
  --regional: #6b7280;
  --tooltip-bg: #ffffff;
  --tooltip-border: #d1d5db;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
#viz {
  width: 100vw;
  height: 100vh;
  display: block;
}
.axis path, .axis line {
  stroke: var(--grid);
  shape-rendering: crispEdges;
}
.axis text {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 500;
}
.title {
  fill: var(--fg);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.subtitle {
  fill: var(--muted);
  font-size: 11px;
}
.tournament {
  cursor: pointer;
  transition: stroke-width 0.15s ease, filter 0.15s ease;
}
.tournament:hover {
  stroke-width: 2.5;
  filter: brightness(1.25);
}
.label {
  fill: #ffffff;
  font-size: 10px;
  font-weight: 700;
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}
.legend text {
  fill: var(--muted);
  font-size: 11px;
}
#tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--tooltip-bg);
  border: 1px solid var(--tooltip-border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
  max-width: 280px;
  opacity: 0;
  transition: opacity 0.12s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  z-index: 10;
}
#tooltip .tt-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 4px;
}
#tooltip .tt-tier {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 4px;
  margin-bottom: 6px;
}
#tooltip .tt-row {
  color: var(--muted);
}
#tooltip .tt-row strong {
  color: var(--fg);
  font-weight: 500;
}
#tooltip .tt-podium {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--tooltip-border);
}
#tooltip .tt-podium-row {
  display: flex;
  gap: 6px;
  color: var(--fg);
}
#tooltip .tt-medal { width: 14px; }