/* Custom styles */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.fade-in {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Chart container */
.chart-container {
  position: relative;
  height: 300px;
  width: 100%;
}

/* Tooltip styles */
.tooltip {
  position: absolute;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 14px;
  pointer-events: none;
  z-index: 1000;
}

/* Loading spinner */
.spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #3b82f6;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Score circle */
.score-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  font-size: 36px;
  font-weight: bold;
  position: relative;
}

.score-circle::before {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  padding: 5px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}