:root {
  /* ── Colors (HSL) — clean white minimal with a fresh teal primary ── */
  --background: 0 0% 100%;
  --foreground: 222 47% 11%;
  --primary: 174 84% 32%;
  --primary-foreground: 210 40% 98%;
  --secondary: 210 40% 96%;
  --secondary-foreground: 222 47% 11%;
  --accent: 210 40% 96%;
  --accent-foreground: 222 47% 11%;
  --muted: 210 40% 96%;
  --muted-foreground: 215 16% 47%;
  --destructive: 0 84% 60%;
  --border: 214 32% 91%;
  --ring: 174 84% 32%;
  --card: 0 0% 100%;
  --card-foreground: 222 47% 11%;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px 0 hsl(var(--foreground) / 0.05);
  --shadow-md: 0 4px 6px -1px hsl(var(--foreground) / 0.08), 0 2px 4px -2px hsl(var(--foreground) / 0.05);
  --shadow-lg: 0 10px 15px -3px hsl(var(--foreground) / 0.08), 0 4px 6px -4px hsl(var(--foreground) / 0.03);
  --shadow-elegant: 0 10px 30px -10px hsl(var(--primary) / 0.28);

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--primary) / 0.78));
  --gradient-subtle: linear-gradient(135deg, 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: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* ── Typography ── */
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.dark, [data-theme="dark"] {
  --background: 222 47% 11%;
  --foreground: 210 40% 98%;
  --card: 222 47% 13%;
  --card-foreground: 210 40% 98%;
  --secondary: 222 47% 16%;
  --secondary-foreground: 210 40% 98%;
  --muted: 222 47% 16%;
  --muted-foreground: 215 20% 70%;
  --border: 222 47% 22%;
  --shadow-sm: 0 1px 2px 0 hsl(var(--foreground) / 0.06);
  --shadow-md: 0 4px 10px -2px hsl(0 0% 0% / 0.35);
  --shadow-lg: 0 18px 30px -12px hsl(0 0% 0% / 0.45);
  --shadow-elegant: 0 18px 40px -18px hsl(var(--primary) / 0.35);
}

html, body {
  height: 100%;
  font-family: var(--font-sans);
}

* {
  -webkit-tap-highlight-color: transparent;
}

/* Focus ring */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px hsl(var(--ring) / 0.25);
  border-radius: var(--radius-sm);
}

/* Subtle app background pattern (CSS-only) */
.app-bg {
  background-image: radial-gradient(hsl(var(--border)) 1px, transparent 1px);
  background-size: 18px 18px;
  background-position: -2px -2px;
}

/* Simple animation helpers */
@keyframes pop {
  0% { transform: scale(0.98); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

.pop {
  animation: pop var(--transition-smooth) both;
}

/* Hide scrollbars on mobile while keeping scroll */
.no-scrollbar::-webkit-scrollbar {
  width: 0px;
  height: 0px;
}
.no-scrollbar {
  scrollbar-width: none;
}