/* CSS Custom Properties - Foundation Variables */
:root {
  /* Brand Colors - Nam Ho Travel */
  --color-primary: #0f4b8f;
  --color-primary-hover: #0d3f78;
  --color-primary-trans: rgba(15, 75, 143, 0.9);
  --color-secondary: #e7d2a1;
  
  /* RGB values for alpha compositing */
  --color-primary-rgb: 15, 75, 143;
  --color-primary-hover-rgb: 13, 63, 120;
  
  /* Additional primary variations */
  --color-primary-light: #1a5ba8;
  --color-primary-10: rgba(15, 75, 143, 0.1);
  --color-primary-80: rgba(15, 75, 143, 0.8);
  
  /* Text Colors */
  --color-title: #363636;
  --color-text: #999999;
  --color-text-light: #cccccc;
  --color-text-dark: #666666;
  
  /* Background Colors */
  --color-white: #ffffff;
  --color-black: #111111;
  --color-background: #fafafa;
  --color-background-gray: #f8f9fa;
  
  /* Border Colors */
  --color-border: #ebebeb;
  --color-border-light: #e8edf0;
  --color-border-gray: #e9ecef;
  
  /* Status Colors - Aligned with Nam Ho Travel Design System */
  --color-success: #10b981;      /* Modern green for positive status */
  --color-success-light: #d1fae5; /* Light green for backgrounds */
  --color-error: #ef4444;        /* Modern red for negative status */
  --color-error-light: #fef2f2;  /* Light red for backgrounds */
  --color-warning: #f59e0b;      /* Modern amber for warnings */
  --color-warning-light: #fef3c7; /* Light amber for backgrounds */
  
  /* Typography */
  --font-primary: 'Poppins', sans-serif;
  --font-secondary: 'Poppins', sans-serif;
  --font-accent: 'Poppins', sans-serif;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 0.9375rem;  /* 15px */
  --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 */
  
  /* Spacing Scale */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 0.75rem;    /* 12px */
  --spacing-lg: 1rem;       /* 16px */
  --spacing-xl: 1.5rem;     /* 24px */
  --spacing-2xl: 2rem;      /* 32px */
  --spacing-3xl: 3rem;      /* 48px */
  --spacing-4xl: 4rem;      /* 64px */
  --spacing-5xl: 5rem;      /* 80px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;     /* 4px */
  --radius-md: 0.5rem;      /* 8px */
  --radius-lg: 0.75rem;     /* 12px */
  --radius-xl: 1rem;        /* 16px */
  --radius-2xl: 1.5rem;     /* 24px */
  --radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: all 0.15s ease-in-out;
  --transition-normal: all 0.3s ease-in-out;
  --transition-slow: all 0.5s ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 1rem;
  --header-height: 80px;
  --desktop-header-height: 96px;  /* h-24 */
  --desktop-header-height-scrolled: 64px;  /* h-16 */
  --mobile-header-height: 80px;
  --header-z-index: 450;
  --footer-height: auto;
}

/* Dark Mode Variables (Future Enhancement) - DISABLED to prevent system dark mode interference */
/*
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0f172a;
    --color-title: #f1f5f9;
    --color-text: #94a3b8;
    --color-border: #334155;
  }
}
*/