/**
 * CSS Custom Properties (Variables)
 * Intelligent Amenities Theme
 */

:root {
    /* Colors - Modern Tech Palette */
    --color-primary: #2563eb;        /* Electric blue */
    --color-secondary: #7c3aed;      /* Purple */
    --color-accent: #06b6d4;         /* Cyan */
    --color-dark: #0f172a;           /* Deep navy */
    --color-gray: #64748b;           /* Slate gray */
    --color-gray-light: #cbd5e1;     /* Light slate */
    --color-light: #f8fafc;          /* Off-white */
    --color-white: #ffffff;          /* Pure white */

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(37, 99, 235, 0.9) 0%, rgba(124, 58, 237, 0.8) 100%);

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    --font-size-base: 1rem;          /* 16px */
    --font-size-sm: 0.875rem;        /* 14px */
    --font-size-md: 1.125rem;        /* 18px */
    --font-size-lg: 1.5rem;          /* 24px */
    --font-size-xl: 2rem;            /* 32px */
    --font-size-2xl: 2.75rem;        /* 44px */
    --font-size-3xl: 3.5rem;         /* 56px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --spacing-xs: 0.5rem;            /* 8px */
    --spacing-sm: 1rem;              /* 16px */
    --spacing-md: 1.5rem;            /* 24px */
    --spacing-lg: 2rem;              /* 32px */
    --spacing-xl: 3rem;              /* 48px */
    --spacing-2xl: 4rem;             /* 64px */
    --spacing-3xl: 6rem;             /* 96px */

    /* Layout */
    --container-width: 1200px;
    --container-wide: 1400px;
    --container-padding: 1.5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;           /* 6px */
    --radius-md: 0.5rem;             /* 8px */
    --radius-lg: 0.75rem;            /* 12px */
    --radius-xl: 1rem;               /* 16px */
    --radius-full: 9999px;

    /* 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), 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);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Responsive font scaling */
@media (max-width: 768px) {
    :root {
        --font-size-2xl: 2rem;       /* Scale down on mobile */
        --font-size-3xl: 2.5rem;
        --container-padding: 1rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }
}