:root {
  --background: 0 0% 100%;
  --foreground: 222.2 47.4% 11.2%;
  --card: 0 0% 100%;
  --card-foreground: 222.2 47.4% 11.2%;
  --popover: 0 0% 100%;
  --popover-foreground: 222.2 47.4% 11.2%;
  --primary: 222.2 47.4% 11.2%;
  --primary-foreground: 210 40% 98%;
  --secondary: 210 40% 96.1%;
  --secondary-foreground: 222.2 47.4% 11.2%;
  --muted: 210 40% 96.1%;
  --muted-foreground: 215.4 16.3% 46.9%;
  --accent: 210 40% 96.1%;
  --accent-foreground: 222.2 47.4% 11.2%;
  --destructive: 0 100% 50%;
  --destructive-foreground: 210 40% 98%;
  --border: 214.3 31.8% 91.4%;
  --input: 214.3 31.8% 91.4%;
  --ring: 222.2 47.4% 11.2%;
}
.dark {
  --background: 224 71% 4%;
  --foreground: 213 31% 91%;
  --card: 224 71% 4%;
  --card-foreground: 213 31% 91%;
  --popover: 224 71% 4%;
  --popover-foreground: 213 31% 91%;
  --primary: 210 40% 98%;
  --primary-foreground: 222.2 47.4% 11.2%;
  --secondary: 215 28% 17%;
  --secondary-foreground: 210 40% 98%;
  --muted: 215 28% 17%;
  --muted-foreground: 215 20% 65%;
  --accent: 215 28% 17%;
  --accent-foreground: 210 40% 98%;
  --destructive: 0 63% 31%;
  --destructive-foreground: 210 40% 98%;
  --border: 215 28% 17%;
  --input: 215 28% 17%;
  --ring: 216 34% 65%;
}
body {
  background-color: hsl(var(--background));
  color: hsl(var(--foreground));
}
@keyframes pulse-opacity {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.animate-pulse-opacity {
  animation: pulse-opacity 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}