:root {
  --background: 222 33% 97%;
  --foreground: 224 29% 16%;
  --primary: 256 84% 61%;
  --secondary: 187 72% 43%;
  --secondary-foreground: 0 0% 100%;
  --muted: 220 23% 91%;
  --destructive: 356 78% 57%;
  --border: 222 20% 86%;
  --card: 0 0% 100%;
  --shadow-sm: 0 6px 18px hsla(240, 30%, 20%, 0.06);
  --shadow-md: 0 18px 40px hsla(240, 30%, 20%, 0.12);
  --shadow-lg: 0 24px 60px hsla(255, 55%, 25%, 0.18);
  --transition-fast: 160ms ease;
  --transition-smooth: 280ms cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}

.dark {
  --background: 226 30% 9%;
  --foreground: 220 20% 94%;
  --primary: 262 88% 70%;
  --secondary: 187 68% 53%;
  --secondary-foreground: 224 29% 16%;
  --muted: 226 18% 18%;
  --destructive: 356 82% 66%;
  --border: 226 16% 24%;
  --card: 224 28% 12%;
  --shadow-sm: 0 6px 18px hsla(0, 0%, 0%, 0.28);
  --shadow-md: 0 18px 40px hsla(0, 0%, 0%, 0.38);
  --shadow-lg: 0 28px 80px hsla(0, 0%, 0%, 0.48);
}

* {
  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: hsl(var(--background));
  color: hsl(var(--foreground));
}

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

input,
textarea,
button {
  font: inherit;
}

textarea {
  resize: vertical;
}

::selection {
  background: hsla(var(--primary), 0.24);
}