:root {
  --background: 216 33% 97%;
  --foreground: 225 29% 14%;
  --primary: 255 84% 61%;
  --secondary: 193 74% 90%;
  --muted: 218 28% 92%;
  --destructive: 0 75% 56%;
  --border: 220 22% 84%;
  --card: 0 0% 100%;
  --shadow-sm: 0 8px 20px hsla(226, 30%, 12%, 0.06);
  --shadow-md: 0 18px 40px hsla(226, 30%, 12%, 0.1);
  --shadow-lg: 0 28px 70px hsla(226, 30%, 12%, 0.16);
  --transition-fast: 180ms ease;
  --transition-smooth: 320ms cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

.dark {
  --background: 228 25% 9%;
  --foreground: 210 24% 96%;
  --primary: 258 92% 70%;
  --secondary: 205 36% 18%;
  --muted: 225 17% 17%;
  --destructive: 0 84% 64%;
  --border: 223 16% 24%;
  --card: 228 22% 12%;
  --shadow-sm: 0 8px 20px hsla(0, 0%, 0%, 0.22);
  --shadow-md: 0 18px 40px hsla(0, 0%, 0%, 0.3);
  --shadow-lg: 0 28px 70px hsla(0, 0%, 0%, 0.42);
}

* {
  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(--secondary) / 0.8), transparent 32%),
    radial-gradient(circle at top right, hsl(var(--primary) / 0.14), transparent 24%),
    hsl(var(--background));
  color: hsl(var(--foreground));
}

.glass {
  background: linear-gradient(180deg, hsl(var(--card) / 0.92), hsl(var(--card) / 0.82));
  backdrop-filter: blur(16px);
}

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

textarea {
  resize: vertical;
}

::selection {
  background: hsl(var(--primary) / 0.22);
}

pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

@media (max-width: 640px) {
  body {
    background:
      radial-gradient(circle at top left, hsl(var(--secondary) / 0.7), transparent 36%),
      hsl(var(--background));
  }
}