:root {
  --background: 222 47% 7%;
  --foreground: 210 40% 96%;
  --primary: 166 84% 54%;
  --secondary: 262 83% 66%;
  --muted: 219 20% 23%;
  --destructive: 0 78% 62%;
  --border: 218 24% 22%;
  --card: 222 39% 11%;
  --shadow-sm: 0 6px 18px hsl(220 55% 2% / 0.25);
  --shadow-md: 0 16px 44px hsl(220 55% 2% / 0.35);
  --shadow-lg: 0 24px 80px hsl(220 55% 2% / 0.48);
  --transition-fast: 150ms ease;
  --transition-smooth: 260ms cubic-bezier(.2,.8,.2,1);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}
.dark {
  --background: 222 47% 7%;
  --foreground: 210 40% 96%;
  --primary: 166 84% 54%;
  --secondary: 262 83% 66%;
  --muted: 219 20% 23%;
  --destructive: 0 78% 62%;
  --border: 218 24% 22%;
  --card: 222 39% 11%;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: hsl(var(--background)); }
body {
  margin: 0;
  min-height: 100%;
  color: hsl(var(--foreground));
  background:
    radial-gradient(circle at 10% 0%, hsl(var(--secondary) / 0.23), transparent 32rem),
    radial-gradient(circle at 90% 8%, hsl(var(--primary) / 0.16), transparent 30rem),
    hsl(var(--background));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, sans-serif;
}
button, a, textarea, input { transition: var(--transition-smooth); }
button, a { -webkit-tap-highlight-color: transparent; }
textarea, input { font-size: max(16px, 1rem); }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace; }
.card {
  background: linear-gradient(180deg, hsl(var(--card) / 0.92), hsl(var(--card) / 0.74));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.soft-card {
  background: hsl(var(--muted) / 0.34);
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-md);
}
.focus-ring:focus-visible {
  outline: 3px solid hsl(var(--primary) / 0.42);
  outline-offset: 2px;
}
.safe-bottom { padding-bottom: calc(0.75rem + env(safe-area-inset-bottom)); }
.scrollbar-thin::-webkit-scrollbar { width: 8px; height: 8px; }
.scrollbar-thin::-webkit-scrollbar-thumb { background: hsl(var(--muted)); border-radius: 999px; }