:root {
  --background: 218 38% 97%;
  --foreground: 224 30% 14%;
  --primary: 221 83% 53%;
  --secondary: 268 70% 58%;
  --muted: 220 20% 92%;
  --destructive: 0 75% 54%;
  --border: 220 22% 84%;
  --card: 0 0% 100%;
  --success: 154 62% 38%;
  --warning: 34 92% 52%;
  --shadow-sm: 0 10px 24px hsla(221, 40%, 20%, 0.08);
  --shadow-md: 0 18px 45px hsla(221, 48%, 18%, 0.12);
  --shadow-lg: 0 26px 70px hsla(221, 48%, 18%, 0.18);
  --transition-fast: 160ms ease;
  --transition-smooth: 300ms cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

.dark {
  --background: 225 30% 8%;
  --foreground: 213 31% 94%;
  --primary: 217 91% 62%;
  --secondary: 271 91% 67%;
  --muted: 224 22% 16%;
  --destructive: 0 84% 64%;
  --border: 224 18% 22%;
  --card: 225 24% 11%;
  --success: 154 60% 48%;
  --warning: 38 92% 58%;
  --shadow-sm: 0 10px 24px hsla(220, 80%, 3%, 0.25);
  --shadow-md: 0 18px 45px hsla(220, 80%, 3%, 0.35);
  --shadow-lg: 0 26px 70px hsla(220, 80%, 3%, 0.46);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, hsla(221, 83%, 53%, 0.12), transparent 30%),
    radial-gradient(circle at top right, hsla(268, 70%, 58%, 0.12), transparent 34%),
    hsl(var(--background));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.card-surface {
  background: linear-gradient(180deg, hsla(0, 0%, 100%, 0.78), hsla(0, 0%, 100%, 0.96));
  background-color: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

.dark .card-surface {
  background: linear-gradient(180deg, hsla(225, 24%, 12%, 0.86), hsla(225, 24%, 11%, 0.98));
}

.panel-hover {
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

.panel-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: hsla(221, 83%, 53%, 0.28);
}

.glow-ring {
  position: relative;
}

.glow-ring::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, hsla(221, 83%, 53%, 0.28), hsla(268, 70%, 58%, 0.18));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.metric-number {
  font-variant-numeric: tabular-nums;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 9999px;
  background: hsl(var(--success));
  box-shadow: 0 0 0 0 hsla(154, 60%, 48%, 0.65);
  animation: pingDot 1.8s infinite;
}

@keyframes pingDot {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 hsla(154, 60%, 48%, 0.6);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 12px hsla(154, 60%, 48%, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 hsla(154, 60%, 48%, 0);
  }
}

.skeleton {
  background: linear-gradient(90deg, hsla(220, 20%, 85%, 0.7), hsla(220, 24%, 94%, 0.9), hsla(220, 20%, 85%, 0.7));
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
}

.dark .skeleton {
  background: linear-gradient(90deg, hsla(224, 16%, 18%, 0.8), hsla(224, 12%, 24%, 0.95), hsla(224, 16%, 18%, 0.8));
  background-size: 200% 100%;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.grid-chart {
  background-image:
    linear-gradient(to right, hsla(220, 20%, 50%, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, hsla(220, 20%, 50%, 0.08) 1px, transparent 1px);
  background-size: 22px 22px;
}

button, a {
  transition: all var(--transition-fast);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  background: hsla(220, 15%, 55%, 0.35);
  border-radius: 999px;
}

::-webkit-scrollbar-track {
  background: transparent;
}