/* ═══════════════════════════════════════════════════════════════
   Poetforio Design System — CSS Custom Properties
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* ─── Color Palette ─── */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  --color-accent-50: #faf5ff;
  --color-accent-100: #f3e8ff;
  --color-accent-200: #e9d5ff;
  --color-accent-300: #d8b4fe;
  --color-accent-400: #c084fc;
  --color-accent-500: #a855f7;
  --color-accent-600: #9333ea;
  --color-accent-700: #7e22ce;
  --color-accent-800: #6b21a8;
  --color-accent-900: #581c87;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #06b6d4;

  /* ─── Neutrals ─── */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-gray-950: #020617;

  /* ─── Semantic Colors ─── */
  --bg-primary: var(--color-white);
  --bg-secondary: var(--color-gray-50);
  --bg-tertiary: var(--color-gray-100);
  --bg-inverse: var(--color-gray-900);
  --bg-overlay: rgba(15, 23, 42, 0.6);

  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-tertiary: var(--color-gray-400);
  --text-inverse: var(--color-white);
  --text-link: var(--color-primary-600);

  --border-color: var(--color-gray-200);
  --border-color-hover: var(--color-gray-300);

  /* ─── Gradients ─── */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #d946ef 100%);
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  --gradient-card: linear-gradient(135deg, rgba(59,130,246,0.05) 0%, rgba(139,92,246,0.05) 100%);
  --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(59,130,246,0.15), transparent 40%);
  --gradient-mesh: 
    radial-gradient(at 40% 20%, hsla(228,68%,55%,0.15) 0px, transparent 50%),
    radial-gradient(at 80% 0%, hsla(270,68%,55%,0.12) 0px, transparent 50%),
    radial-gradient(at 0% 50%, hsla(340,68%,55%,0.08) 0px, transparent 50%);

  /* ─── Typography ─── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* ─── Spacing ─── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* ─── Borders & Radius ─── */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* ─── Shadows ─── */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);
  --shadow-glow: 0 0 30px rgba(59,130,246,0.3);
  --shadow-glow-lg: 0 0 60px rgba(59,130,246,0.4);

  /* ─── Transitions ─── */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ─── Z-Index Scale ─── */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-overlay: 40;
  --z-modal: 50;
  --z-toast: 60;

  /* ─── Container ─── */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1400px;
}

/* ─── Dark Mode ─── */
[data-theme="dark"] {
  --bg-primary: var(--color-gray-950);
  --bg-secondary: var(--color-gray-900);
  --bg-tertiary: var(--color-gray-800);
  --bg-inverse: var(--color-white);

  --text-primary: var(--color-gray-100);
  --text-secondary: var(--color-gray-400);
  --text-tertiary: var(--color-gray-500);
  --text-inverse: var(--color-gray-900);
  --text-link: var(--color-primary-400);

  --border-color: var(--color-gray-800);
  --border-color-hover: var(--color-gray-700);

  --gradient-card: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(139,92,246,0.08) 100%);
}