:root {
  --background: 216 33% 98%;
  --foreground: 225 28% 16%;
  --primary: 250 84% 60%;
  --secondary: 181 72% 40%;
  --muted: 220 24% 93%;
  --destructive: 2 74% 56%;
  --border: 220 19% 86%;
  --card: 0 0% 100%;

  --shadow-sm: 0 8px 20px hsla(244, 45%, 20%, 0.06);
  --shadow-md: 0 18px 40px hsla(244, 45%, 18%, 0.1);
  --shadow-lg: 0 28px 80px hsla(244, 50%, 16%, 0.16);

  --transition-fast: 160ms ease;
  --transition-smooth: 300ms cubic-bezier(0.22, 1, 0.36, 1);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

.dark {
  --background: 230 24% 10%;
  --foreground: 220 23% 94%;
  --primary: 254 89% 69%;
  --secondary: 182 67% 48%;
  --muted: 227 20% 18%;
  --destructive: 2 78% 64%;
  --border: 226 17% 24%;
  --card: 228 22% 13%;

  --shadow-sm: 0 10px 24px hsla(0, 0%, 0%, 0.22);
  --shadow-md: 0 24px 60px hsla(0, 0%, 0%, 0.28);
  --shadow-lg: 0 36px 100px hsla(0, 0%, 0%, 0.36);
}

* {
  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;
}

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

textarea {
  resize: vertical;
}

.panel-surface {
  background:
    linear-gradient(180deg, hsl(var(--card)), hsl(var(--card))),
    radial-gradient(circle at top right, hsl(var(--primary) / 0.08), transparent 40%);
}

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