/* ============================================
   DESIGN TOKENS — AI Image Generator
   Premium color palette, typography, spacing
   ============================================ */

:root {
  /* ── Primary Palette (Forest Emerald) ── */
  --color-primary-50: #ecfdf5;
  --color-primary-100: #d1fae5;
  --color-primary-200: #a7f3d0;
  --color-primary-300: #6ee7b7;
  --color-primary-400: #34d399;
  --color-primary-500: #10b981;
  --color-primary-600: #059669;
  --color-primary-700: #047857;
  --color-primary-800: #065f46;
  --color-primary-900: #064e3b;

  /* ── Accent Palette (Teal Mint) ── */
  --color-accent-50: #f0fdfa;
  --color-accent-100: #ccfbf1;
  --color-accent-200: #99f6e4;
  --color-accent-300: #5eead4;
  --color-accent-400: #2dd4bf;
  --color-accent-500: #14b8a6;
  --color-accent-600: #0d9488;
  --color-accent-700: #0f766e;
  --color-accent-800: #115e59;
  --color-accent-900: #134e4a;

  /* ── Success ── */
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;

  /* ── Warning ── */
  --color-warning-400: #fbbf24;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;

  /* ── Error ── */
  --color-error-400: #f87171;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;

  /* ── Info ── */
  --color-info-400: #60a5fa;
  --color-info-500: #3b82f6;
  --color-info-600: #2563eb;

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
  --gradient-primary-hover: linear-gradient(135deg, #34d399 0%, #2dd4bf 100%);
  --gradient-warm: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  --gradient-cool: linear-gradient(135deg, #2dd4bf 0%, #06b6d4 100%);
  --gradient-aurora: linear-gradient(135deg, #10b981 0%, #2dd4bf 50%, #34d399 100%);
  --gradient-sunset: linear-gradient(135deg, #34d399 0%, #a7f3d0 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(16, 185, 129, 0.2) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(20, 184, 166, 0.2) 0px, transparent 50%),
                   radial-gradient(at 0% 50%, rgba(52, 211, 153, 0.15) 0px, transparent 50%);

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

  --text-xs: 0.6875rem;    /* 11px */
  --text-sm: 0.8125rem;    /* 13px */
  --text-base: 0.9375rem;  /* 15px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.3125rem;    /* 21px */
  --text-2xl: 1.625rem;    /* 26px */
  --text-3xl: 2rem;        /* 32px */
  --text-4xl: 2.5rem;      /* 40px */

  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;

  /* ── Spacing ── */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */

  /* ── Border Radius ── */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16), 0 8px 16px rgba(0, 0, 0, 0.08);
  --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.2), 0 12px 24px rgba(0, 0, 0, 0.1);
  --shadow-glow-primary: 0 0 24px rgba(16, 185, 129, 0.3);
  --shadow-glow-accent: 0 0 24px rgba(45, 212, 191, 0.3);
  --shadow-glow-error: 0 0 16px rgba(239, 68, 68, 0.3);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.1);

  /* ── Glassmorphism ── */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-hover: rgba(255, 255, 255, 0.1);
  --glass-bg-active: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-hover: rgba(255, 255, 255, 0.18);
  --glass-blur: 20px;
  --glass-blur-heavy: 40px;

  /* ── Z-Index Scale ── */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-tooltip: 600;
  --z-max: 9999;

  /* ── 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: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-theme: 300ms ease;

  /* ── Layout ── */
  --sidebar-width: 72px;
  --sidebar-width-expanded: 240px;
  --controls-width: 360px;
  --header-height: 56px;
  --panel-gap: 1px;

  /* ── Scrollbar ── */
  --scrollbar-width: 8px;
  --scrollbar-track: rgba(0, 0, 0, 0.15);
  --scrollbar-thumb: rgba(255, 255, 255, 0.25);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.45);
}