/* ============================================
   RyterAi Design System — Variables
   ============================================ */

:root {
  /* ── Colors ── */
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #3B82F6;
  --color-primary-50: #EFF6FF;
  --color-secondary: #7C3AED;
  --color-secondary-dark: #6D28D9;
  --color-secondary-light: #8B5CF6;
  --color-dark: #111827;
  --color-text: #374151;
  --color-text-light: #6B7280;
  --color-text-lighter: #9CA3AF;
  --color-bg: #F9FAFB;
  --color-bg-dark: #0F172A;
  --color-bg-darker: #020617;
  --color-white: #FFFFFF;
  --color-success: #10B981;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, #2563EB, #7C3AED);
  --gradient-primary-hover: linear-gradient(135deg, #1D4ED8, #6D28D9);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 40%, #1E1B4B 100%);
  --gradient-card-hover: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(124, 58, 237, 0.04));
  --gradient-cta: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  --gradient-subtle: linear-gradient(135deg, #EEF2FF, #F5F3FF);
  --gradient-dark: linear-gradient(135deg, #0F172A, #1E1B4B);

  /* ── Typography ── */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  --letter-spacing-wider: 0.1em;

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

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.25);
  --shadow-glow-lg: 0 0 60px rgba(37, 99, 235, 0.35);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 20px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(37, 99, 235, 0.08);

  /* ── Transitions ── */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Layout ── */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --header-height: 80px;

  /* ── Z-index ── */
  --z-base: 1;
  --z-header: 1000;
  --z-mobile-menu: 999;
  --z-overlay: 998;
  --z-modal: 1100;
}