/* NeighbourGuard™ CSS Custom Properties */
:root {
    /* Colors - Primary */
    --color-primary: #ff6b35;
    --color-primary-50: #fff4f1;
    --color-primary-100: #ffe4dc;
    --color-primary-200: #ffcbb8;
    --color-primary-300: #ffa68a;
    --color-primary-400: #ff7a5c;
    --color-primary-500: #ff6b35;
    --color-primary-600: #f04c1a;
    --color-primary-700: #d63910;
    --color-primary-800: #b52f10;
    --color-primary-900: #942914;

    /* Colors - Secondary */
    --color-secondary: #1e3a8a;
    --color-secondary-50: #eff6ff;
    --color-secondary-100: #dbeafe;
    --color-secondary-200: #bfdbfe;
    --color-secondary-300: #93c5fd;
    --color-secondary-400: #60a5fa;
    --color-secondary-500: #3b82f6;
    --color-secondary-600: #1e3a8a;
    --color-secondary-700: #1e40af;
    --color-secondary-800: #1e3a8a;
    --color-secondary-900: #1a365d;

    /* Colors - Neutral */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Colors - Semantic */
    --color-success: #10b981;
    --color-success-50: #ecfdf5;
    --color-success-100: #d1fae5;
    --color-success-600: #059669;
    --color-success-700: #047857;

    --color-error: #ef4444;
    --color-error-50: #fef2f2;
    --color-error-100: #fee2e2;
    --color-error-600: #dc2626;
    --color-error-700: #b91c1c;

    --color-warning: #f59e0b;
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-600: #d97706;
    --color-warning-700: #b45309;

    --color-info: #3b82f6;
    --color-info-50: #eff6ff;
    --color-info-100: #dbeafe;
    --color-info-600: #2563eb;
    --color-info-700: #1d4ed8;

    /* Text Colors */
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-600);
    --color-text-muted: var(--color-gray-500);
    --color-text-inverse: var(--color-white);

    /* Border Colors */
    --border-light: var(--color-gray-200);
    --border-default: var(--color-gray-300);
    --border-dark: var(--color-gray-400);

    /* Typography */
    --font-sans: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, 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 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-snug: 1.375;
    --line-height-base: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* 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: 6rem;
    /* 96px */

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    /* 2px */
    --radius-default: 0.25rem;
    /* 4px */
    --radius-md: 0.375rem;
    /* 6px */
    --radius-lg: 0.5rem;
    /* 8px */
    --radius-xl: 0.75rem;
    /* 12px */
    --radius-2xl: 1rem;
    /* 16px */
    --radius-3xl: 1.5rem;
    /* 24px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-default: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
    --transition-fast: all 0.1s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;

    /* Z-Index Scale */
    --z-hide: -1;
    --z-base: 0;
    --z-docked: 10;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-header: 1030;
    --z-overlay: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 10001;

    /* Breakpoints (for reference in JavaScript) */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* Component-specific */
    --header-height: 80px;
    --sidebar-width: 280px;
    --sidebar-width-collapsed: 80px;

    /* Interactive States */
    --focus-ring: 0 0 0 3px rgba(255, 107, 53, 0.1);
    --focus-ring-offset: 2px;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, #f7931e 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, #2563eb 100%);
    --gradient-hero: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

/* Dark mode variables (future enhancement) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text-primary: var(--color-gray-900);
        --color-text-secondary: var(--color-gray-300);
        --color-text-muted: var(--color-gray-400);
        --border-light: var(--color-gray-700);
        --border-default: var(--color-gray-600);
        --border-dark: var(--color-gray-500);
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

@media (min-width: 640px) {
    .container {
        padding-left: var(--spacing-xl);
        padding-right: var(--spacing-xl);
    }
}

/* Focus management for accessibility */
.focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: var(--focus-ring-offset);
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.4),
            transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }

    100% {
        left: 100%;
    }
}

/* Skeleton loading */
.skeleton {
    background: var(--color-gray-200);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.6),
            transparent);
    animation: shimmer 1.5s infinite;
}

/* Responsive utilities */
.hidden {
    display: none;
}

@media (max-width: 767px) {
    .hidden-mobile {
        display: none;
    }
}

@media (min-width: 768px) {
    .hidden-desktop {
        display: none;
    }
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }

    * {
        color: black !important;
        background: white !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
}