/* ==========================================================================
   Design tokens — Wiki Aziendale AI
   ========================================================================== */

:root {
  /* ------ Colors (light mode default) ------ */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;

  --color-accent-500: #f59e0b;
  --color-accent-600: #d97706;

  --color-success-500: #10b981;
  --color-warning-500: #f59e0b;
  --color-danger-500:  #ef4444;
  --color-danger-600:  #dc2626;
  --color-info-500:    #3b82f6;

  --color-neutral-0:   #ffffff;
  --color-neutral-50:  #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;
  --color-neutral-950: #030712;

  /* ------ Surfaces (semantic) ------ */
  --bg-app:        var(--color-neutral-50);
  --bg-surface:    var(--color-neutral-0);
  --bg-surface-2:  var(--color-neutral-100);
  --bg-surface-3:  var(--color-neutral-200);
  --bg-overlay:    rgba(15, 23, 42, 0.55);

  --fg-primary:    var(--color-neutral-900);
  --fg-secondary:  var(--color-neutral-600);
  --fg-tertiary:   var(--color-neutral-500);
  --fg-inverse:    var(--color-neutral-0);
  --fg-on-primary: #ffffff;

  --border-subtle: var(--color-neutral-200);
  --border-default: var(--color-neutral-300);
  --border-strong: var(--color-neutral-400);

  /* ------ Typography ------ */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;

  --fs-xs:   0.75rem;   /* 12 */
  --fs-sm:   0.875rem;  /* 14 */
  --fs-base: 1rem;      /* 16 */
  --fs-lg:   1.125rem;  /* 18 */
  --fs-xl:   1.25rem;   /* 20 */
  --fs-2xl:  1.5rem;    /* 24 */
  --fs-3xl:  2rem;      /* 32 */
  --fs-4xl:  2.5rem;    /* 40 */

  --lh-tight:  1.25;
  --lh-normal: 1.5;
  --lh-loose:  1.75;

  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  /* ------ Spacing (4px base) ------ */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* ------ Radius ------ */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-pill: 9999px;

  /* ------ Shadows ------ */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 24px -8px rgba(15, 23, 42, 0.12), 0 4px 8px -2px rgba(15, 23, 42, 0.06);
  --shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.18);
  --shadow-ring: 0 0 0 3px rgba(99, 102, 241, 0.25);

  /* ------ Z-index ------ */
  --z-base: 1;
  --z-sticky: 100;
  --z-drawer: 900;
  --z-modal: 1000;
  --z-toast: 1100;

  /* ------ Motion ------ */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 320ms;

  /* ------ Layout ------ */
  --topbar-h: 60px;
  --sidebar-w: 280px;
  --sources-w: 340px;
  --bottom-nav-h: 64px;
  --content-max: 920px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-app:       #0b1020;
    --bg-surface:   #131a2e;
    --bg-surface-2: #1a2238;
    --bg-surface-3: #232c46;
    --bg-overlay:   rgba(2, 6, 23, 0.7);

    --fg-primary:   #e6e9f2;
    --fg-secondary: #a3aac3;
    --fg-tertiary:  #6f7693;
    --fg-inverse:   #0b1020;

    --border-subtle: #1f2842;
    --border-default: #2a345a;
    --border-strong: #3b4878;

    --shadow-xs: 0 1px 2px rgba(0,0,0,0.45);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 6px 16px rgba(0,0,0,0.55);
    --shadow-lg: 0 16px 32px rgba(0,0,0,0.6);
    --shadow-xl: 0 28px 56px rgba(0,0,0,0.7);
  }
}

/* Forced theme (toggle manuale) */
[data-theme="dark"] {
  --bg-app:       #0b1020;
  --bg-surface:   #131a2e;
  --bg-surface-2: #1a2238;
  --bg-surface-3: #232c46;
  --bg-overlay:   rgba(2, 6, 23, 0.7);
  --fg-primary:   #e6e9f2;
  --fg-secondary: #a3aac3;
  --fg-tertiary:  #6f7693;
  --fg-inverse:   #0b1020;
  --border-subtle: #1f2842;
  --border-default: #2a345a;
  --border-strong: #3b4878;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.45);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.55);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.6);
  --shadow-xl: 0 28px 56px rgba(0,0,0,0.7);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-base: 0ms;
    --duration-slow: 0ms;
  }
}