/**
 * BOOKINGPARK OPTIMIZED CSS 2025
 * Fractal Recursive Optimization - Critical CSS First
 * Performance-optimized, consolidated, and future-proof
 */

/* ========================================
   CRITICAL CSS VARIABLES - LOAD FIRST
   ======================================== */
:root {
    /* 🎯 UNIFIED COLOR SYSTEM - STRICT COMPLIANCE */
    --bp-primary: #1c75c7;
    --bp-secondary: #1c75c7;
    --bp-accent: #F97316;
    --bp-white: #FFFFFF;
    --bp-black: #111827;
    --bp-gray-50: #F8FAFC;
    --bp-gray-100: #F1F5F9;
    --bp-gray-200: #E2E8F0;
    --bp-gray-300: #CBD5E1;
    --bp-gray-400: #94A3B8;
    --bp-gray-500: #64748B;
    --bp-gray-600: #475569;
    --bp-gray-700: #334155;
    --bp-gray-800: #1E293B;
    --bp-gray-900: #0F172A;
    
    /* 🚀 PERFORMANCE-OPTIMIZED SPACING */
    --space-0: 0;
    --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;
    
    /* 📱 RESPONSIVE BREAKPOINTS */
    --mobile: 576px;
    --tablet: 768px;
    --desktop: 1024px;
    --wide: 1280px;
    --ultra-wide: 1536px;
    
    /* 🎨 MODERN GRADIENTS */
    --gradient-primary: linear-gradient(135deg, var(--bp-primary) 0%, var(--bp-primary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--bp-accent) 0%, #FB923C 100%);
    --gradient-light: linear-gradient(135deg, var(--bp-gray-50) 0%, var(--bp-gray-100) 100%);
    
    /* ⚡ PERFORMANCE OPTIMIZATIONS */
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* 🔤 TYPOGRAPHY SCALE */
    --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;
    
    /* 🎯 Z-INDEX SYSTEM */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* ========================================
   CRITICAL PERFORMANCE BASE
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: "Work Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--bp-gray-800);
    background-color: var(--bp-white);
    overflow-x: hidden;
}

/* ========================================
   CRITICAL LAYOUT COMPONENTS
   ======================================== */
.container {
    width: 100%;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--space-3) * -1);
}

.col {
    flex: 1;
    padding: 0 var(--space-3);
}

/* ========================================
   CRITICAL BUTTON SYSTEM
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    user-select: none;
    white-space: nowrap;
    min-height: 44px; /* Touch target */
}

.btn-primary {
    color: var(--bp-white);
    background: var(--gradient-primary);
    border-color: var(--bp-primary);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(28, 117, 199, 0.3);
}

.btn-accent {
    color: var(--bp-white);
    background: var(--gradient-accent);
    border-color: var(--bp-accent);
}

.btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.btn-outline {
    color: var(--bp-primary);
    background: transparent;
    border-color: var(--bp-primary);
}

.btn-outline:hover {
    color: var(--bp-white);
    background: var(--bp-primary);
}

/* ========================================
   CRITICAL FORM ELEMENTS
   ======================================== */
.form-control {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--bp-gray-800);
    background-color: var(--bp-white);
    border: 1px solid var(--bp-gray-300);
    border-radius: var(--border-radius);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    min-height: 44px; /* Touch target */
}

.form-control:focus {
    outline: 0;
    border-color: var(--bp-primary);
    box-shadow: 0 0 0 3px rgba(28, 117, 199, 0.1);
}

/* ========================================
   CRITICAL NAVIGATION
   ======================================== */
.navbar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    background-color: var(--bp-white);
    border-bottom: 1px solid var(--bp-gray-200);
}

.navbar-brand {
    display: inline-block;
    padding-top: var(--space-1);
    padding-bottom: var(--space-1);
    margin-right: var(--space-4);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--bp-primary);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    flex-direction: row;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0 var(--space-2);
}

.nav-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--bp-gray-700);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

.nav-link:hover {
    color: var(--bp-primary);
}

/* ========================================
   CRITICAL RESPONSIVE UTILITIES
   ======================================== */
@media (max-width: 767.98px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .btn {
        width: 100%;
        margin-bottom: var(--space-2);
    }
    
    .navbar {
        flex-direction: column;
        padding: var(--space-3) 0;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
        margin-top: var(--space-3);
    }
    
    .nav-item {
        margin: var(--space-1) 0;
    }
}

/* ========================================
   CRITICAL PERFORMANCE OPTIMIZATIONS
   ======================================== */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

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

.focus-visible:focus {
    outline: 2px solid var(--bp-primary);
    outline-offset: 2px;
}

/* ========================================
   CRITICAL LOADING STATES
   ======================================== */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--bp-gray-300);
    border-top-color: var(--bp-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}