:root {
  --background: 220 35% 96%;
  --foreground: 222 32% 14%;
  --primary: 227 88% 58%;
  --secondary: 215 42% 91%;
  --muted: 215 28% 88%;
  --destructive: 12 82% 56%;
  --border: 220 22% 82%;
  --card: 0 0% 100%;

  --shadow-sm: 0 8px 20px hsla(227, 40%, 18%, 0.08);
  --shadow-md: 0 16px 40px hsla(227, 40%, 18%, 0.12);
  --shadow-lg: 0 24px 60px hsla(227, 40%, 18%, 0.18);

  --transition-fast: 160ms ease;
  --transition-smooth: 320ms cubic-bezier(0.22, 1, 0.36, 1);

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
}

.dark {
  --background: 224 28% 10%;
  --foreground: 210 36% 96%;
  --primary: 222 92% 66%;
  --secondary: 225 22% 17%;
  --muted: 225 18% 22%;
  --destructive: 10 88% 62%;
  --border: 225 18% 26%;
  --card: 225 24% 14%;

  --shadow-sm: 0 10px 24px hsla(220, 50%, 2%, 0.3);
  --shadow-md: 0 20px 44px hsla(220, 50%, 2%, 0.4);
  --shadow-lg: 0 30px 80px hsla(220, 50%, 2%, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  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) / 0.12), transparent 26%),
    radial-gradient(circle at bottom right, hsl(var(--destructive) / 0.08), transparent 22%),
    hsl(var(--background));
  color: hsl(var(--foreground));
  transition: background var(--transition-smooth), color var(--transition-fast);
}

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

button {
  cursor: pointer;
}

.glass-panel {
  background: linear-gradient(180deg, hsl(var(--card) / 0.94), hsl(var(--card) / 0.86));
  backdrop-filter: blur(14px);
}