:root {
  --color-bg: #ffffff;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-card-bg: #f9fafb;
  --color-border: #e5e7eb;
  --color-enterprise: #1e40af;
  --color-midmarket: #0d9488;
  --color-smb: #059669;
  --color-startup: #6366f1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111827;
    --color-text: #f9fafb;
    --color-text-muted: #9ca3af;
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-card-bg: #1f2937;
    --color-border: #374151;
    --color-enterprise: #3b82f6;
    --color-midmarket: #14b8a6;
    --color-smb: #10b981;
    --color-startup: #818cf8;
  }
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  overflow: hidden;
}

.main {
  width: 600px;
  height: 600px;
  margin: 0 auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}

/* Header - ~40px */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  height: 36px;
  flex-shrink: 0;
}

.title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Controls section - ~36px */
.controls-section {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 32px;
  flex-shrink: 0;
}

.select-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.select {
  padding: 4px 8px;
  font-size: 0.8125rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-card-bg);
  color: var(--color-text);
  cursor: pointer;
}

.select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

/* Chart section - ~420px */
.chart-section {
  flex: 1;
  min-height: 0;
  background: var(--color-card-bg);
  border-radius: 8px;
  padding: 8px;
  border: 1px solid var(--color-border);
}

.chart-container {
  position: relative;
  width: 100%;
  height: 100%;
}

/* Legend section - ~36px */
.legend-section {
  height: 32px;
  flex-shrink: 0;
}

.legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  height: 100%;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-card-bg);
  transition: all 0.15s ease;
}

.legend-item:hover {
  border-color: var(--color-text-muted);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.legend-item.hidden {
  opacity: 0.5;
  background: transparent;
}

.legend-item.hidden .legend-label {
  text-decoration: line-through;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-label {
  font-weight: 500;
}

.legend-count {
  color: var(--color-text-muted);
}

/* Detail section - ~44px */
.detail-section {
  height: 40px;
  flex-shrink: 0;
}

.detail-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  height: 100%;
  background: var(--color-card-bg);
  border-radius: 6px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  font-size: 0.8125rem;
}

.detail-placeholder {
  color: var(--color-text-muted);
}

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

.detail-segment {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  color: white;
}

.detail-segment.enterprise { background: var(--color-enterprise); }
.detail-segment.mid-market { background: var(--color-midmarket); }
.detail-segment.smb { background: var(--color-smb); }
.detail-segment.startup { background: var(--color-startup); }

.detail-metric {
  color: var(--color-text-muted);
}

.detail-metric strong {
  color: var(--color-text);
  font-weight: 600;
}