/* =============================================
   DESIGN TOKENS - Autodoprava Hradecky
   Jednotny design system pre celu platformu
   ============================================= */

:root {
  /* === FARBY === */

  /* Primarne farby */
  --color-primary: #1e293b;
  --color-primary-light: #334155;
  --color-primary-dark: #0f172a;

  /* Akcentove farby */
  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-accent-dark: #2563eb;

  /* Sekundarne farby */
  --color-secondary: #64748b;
  --color-secondary-light: #94a3b8;
  --color-secondary-dark: #475569;

  /* Pozadia */
  --color-bg-primary: #f5f7fa;
  --color-bg-secondary: #e2e8f0;
  --color-bg-white: #ffffff;
  --color-bg-dark: #1e293b;

  /* Text */
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-white: #ffffff;
  --color-text-inverse: #f8fafc;

  /* Stavove farby */
  --color-success: #22c55e;
  --color-success-light: #dcfce7;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-error: #ef4444;
  --color-error-light: #fee2e2;
  --color-info: #3b82f6;
  --color-info-light: #dbeafe;

  /* Gradienty */
  --gradient-primary: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-hero: linear-gradient(135deg, #1e293b 0%, #334155 50%, #3b82f6 100%);
  --gradient-card: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);

  /* Border farby */
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-border-dark: #cbd5e1;

  /* === TYPOGRAFIA === */

  /* Font families */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

  /* Font sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */

  /* Font weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Letter spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  /* === 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 */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* === BORDER RADIUS === */

  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --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);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

  /* Card shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.1), 0 8px 24px rgba(0, 0, 0, 0.08);

  /* === TRANSITIONS === */

  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;

  /* === Z-INDEX === */

  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;

  /* === LAYOUT === */

  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1400px;

  /* Header heights */
  --header-height: 72px;
  --header-height-scrolled: 64px;

  /* Container padding */
  --container-padding: var(--space-6);
  --container-padding-mobile: var(--space-4);
}

/* === MEDIA QUERY BREAKPOINTS (for reference) === */
/*
  Mobile: max-width: 640px
  Tablet: max-width: 768px
  Laptop: max-width: 1024px
  Desktop: max-width: 1280px
  Wide: min-width: 1281px
*/

/* === DARK MODE (pre buducnost) === */
@media (prefers-color-scheme: dark) {
  :root.auto-dark {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-white: #1e293b;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-border: #334155;
  }
}