:root {
  --background: 218 46% 97%;
  --foreground: 222 48% 12%;
  --primary: 222 92% 55%;
  --primary-foreground: 0 0% 100%;
  --secondary: 174 79% 42%;
  --secondary-foreground: 222 48% 12%;
  --muted: 220 18% 88%;
  --muted-foreground: 220 12% 42%;
  --destructive: 354 82% 56%;
  --destructive-foreground: 0 0% 100%;
  --border: 220 18% 82%;
  --card: 0 0% 100%;
  --shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 26px 70px rgba(15, 23, 42, 0.18);
  --transition-fast: 150ms ease;
  --transition-smooth: 280ms cubic-bezier(.2,.8,.2,1);
  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}
.dark {
  --background: 224 45% 7%;
  --foreground: 210 38% 96%;
  --primary: 217 96% 62%;
  --primary-foreground: 0 0% 100%;
  --secondary: 172 78% 48%;
  --secondary-foreground: 224 45% 7%;
  --muted: 224 22% 16%;
  --muted-foreground: 218 16% 72%;
  --destructive: 354 82% 62%;
  --destructive-foreground: 0 0% 100%;
  --border: 224 20% 20%;
  --card: 224 38% 11%;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, hsl(var(--primary) / 0.16), transparent 32rem),
    radial-gradient(circle at bottom right, hsl(var(--secondary) / 0.15), transparent 28rem),
    hsl(var(--background));
  color: hsl(var(--foreground));
}
button, input { font: inherit; }
.glass {
  background: hsl(var(--card) / 0.78);
  backdrop-filter: blur(18px);
  border: 1px solid hsl(var(--border) / 0.8);
  box-shadow: var(--shadow-sm);
}
.card-hover { transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth); }
.card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: hsl(var(--primary) / 0.35); }
.focus-ring:focus { outline: 3px solid hsl(var(--primary) / 0.25); outline-offset: 2px; }
.skeleton { position: relative; overflow: hidden; background: hsl(var(--muted)); }
.skeleton::after { content: ""; position: absolute; inset: 0; transform: translateX(-100%); background: linear-gradient(90deg, transparent, hsl(var(--card) / 0.5), transparent); animation: shimmer 1.25s infinite; }
@keyframes shimmer { 100% { transform: translateX(100%); } }