:root {
  /* ── Colors (HSL) ── */
  --background: 230 35% 98%;
  --foreground: 230 30% 12%;
  --primary: 258 90% 60%;
  --primary-foreground: 210 40% 98%;
  --secondary: 230 25% 94%;
  --secondary-foreground: 230 30% 14%;
  --accent: 190 95% 45%;
  --accent-foreground: 210 40% 98%;
  --muted: 230 20% 92%;
  --muted-foreground: 230 12% 42%;
  --destructive: 0 84% 60%;
  --border: 230 18% 86%;
  --ring: 258 90% 60%;
  --card: 0 0% 100%;
  --card-foreground: 230 30% 12%;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px 0 hsl(var(--foreground) / 0.06);
  --shadow-md: 0 10px 18px -12px hsl(var(--foreground) / 0.25), 0 2px 6px -4px hsl(var(--foreground) / 0.12);
  --shadow-lg: 0 18px 40px -22px hsl(var(--foreground) / 0.35), 0 10px 18px -14px hsl(var(--foreground) / 0.18);
  --shadow-elegant: 0 18px 50px -22px hsl(var(--primary) / 0.35);

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--accent)));
  --gradient-subtle: linear-gradient(135deg, hsl(var(--background)), hsl(var(--secondary)));
  --gradient-hero: radial-gradient(1200px 600px at 80% 10%, hsl(var(--primary) / 0.22), transparent 60%), radial-gradient(900px 500px at 10% 30%, hsl(var(--accent) / 0.18), transparent 55%), linear-gradient(180deg, hsl(var(--background)), hsl(var(--secondary)));

  /* ── Transitions ── */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* ── Border Radius ── */
  --radius-sm: 0.375rem;
  --radius-md: 0.65rem;
  --radius-lg: 0.9rem;
  --radius-xl: 1.2rem;
  --radius-full: 9999px;
}

.dark, [data-theme="dark"] {
  --background: 230 28% 10%;
  --foreground: 210 40% 98%;
  --primary: 258 92% 68%;
  --primary-foreground: 230 28% 10%;
  --secondary: 230 22% 16%;
  --secondary-foreground: 210 40% 98%;
  --accent: 190 95% 55%;
  --accent-foreground: 230 28% 10%;
  --muted: 230 20% 18%;
  --muted-foreground: 230 12% 70%;
  --destructive: 0 84% 60%;
  --border: 230 18% 22%;
  --ring: 258 92% 68%;
  --card: 230 22% 14%;
  --card-foreground: 210 40% 98%;

  --shadow-sm: 0 1px 2px 0 hsl(0 0% 0% / 0.35);
  --shadow-md: 0 10px 18px -12px hsl(0 0% 0% / 0.55), 0 2px 6px -4px hsl(0 0% 0% / 0.35);
  --shadow-lg: 0 18px 40px -22px hsl(0 0% 0% / 0.65), 0 10px 18px -14px hsl(0 0% 0% / 0.45);
  --shadow-elegant: 0 18px 50px -22px hsl(var(--primary) / 0.35);

  --gradient-subtle: linear-gradient(135deg, hsl(var(--background)), hsl(var(--secondary)));
  --gradient-hero: radial-gradient(1200px 600px at 80% 10%, hsl(var(--primary) / 0.18), transparent 60%), radial-gradient(900px 500px at 10% 30%, hsl(var(--accent) / 0.14), transparent 55%), linear-gradient(180deg, hsl(var(--background)), hsl(var(--secondary)));
}

* { box-sizing: border-box; }
html, body { height: 100%; }

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

/* Focus ring */
:where(a, button, input, textarea, select):focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px hsl(var(--ring) / 0.25);
  border-radius: var(--radius-sm);
}

/* Subtle grid background helper */
.bg-grid {
  background-image: linear-gradient(to right, hsl(var(--border) / 0.55) 1px, transparent 1px), linear-gradient(to bottom, hsl(var(--border) / 0.55) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* Smooth page fade */
.page-enter {
  animation: pageIn var(--transition-slow) both;
}
@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}