:root {
            --primary: #3b82f6;
            --secondary: #10b981;
            --accent: #f59e0b;
            --dark: #1f2937;
            --light: #f9fafb;
            --bg-start: #f8fafc;
            --bg-end: #e2e8f0;
            --bg-primary: #ffffff;
            --text-primary: #1f2937;
            --text-secondary: #4b5563;
            --border: #d1d5db;
            --bg-secondary: #f9fafb;
        }
        
        html.dark {
            --primary: #60a5fa;
            --secondary: #34d399;
            --accent: #fbbf24;
            --dark: #f9fafb;
            --light: #1f2937;
            --bg-start: #1e293b;
            --bg-end: #334155;
            --bg-primary: #1f2937;
            --text-primary: #f9fafb;
            --text-secondary: #9ca3af;
            --border: #4b5563;
            --bg-secondary: #374151;
        }
        
        body {
            background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-end) 100%);
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text-primary);
            scroll-behavior: smooth;
        }
        
        .hero {
            background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://www.bsr.org/images/heroes/bsr-travel-hero..jpg');
            background-size: cover;
            background-position: center;
        }
        
        .card {
            transition: all 0.3s ease;
            border-radius: 12px;
            overflow: hidden;
            background: var(--bg-primary);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        
        .search-filter {
            background: var(--bg-primary);
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .destination-card {
            background-size: cover;
            background-position: center;
            height: 250px;
            position: relative;
            border-radius: 12px;
        }
        
        .destination-overlay {
            background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            color: white;
        }
        
        .booking-step {
            display: none;
        }
        
        .booking-step.active {
            display: block;
        }
        
        .nav-tab {
            transition: all 0.3s ease;
        }
        
        .nav-tab.active {
            background-color: var(--primary);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 8px;
        }
        
        .animation-pulse {
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        .success-checkmark {
            display: inline-block;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--secondary);
            position: relative;
            animation: scale 0.5s ease-in-out;
        }
        
        .success-checkmark:after {
            content: '';
            position: absolute;
            left: 25px;
            top: 40px;
            width: 20px;
            height: 40px;
            border: solid white;
            border-width: 0 5px 5px 0;
            transform: rotate(45deg);
        }
        
        @keyframes scale {
            0% { transform: scale(0); }
            50% { transform: scale(1.2); }
            100% { transform: scale(1); }
        }

        /* Mobile menu styles */
        .mobile-menu {
            transform: translateX(100%);
            transition: transform 0.3s ease-in-out;
        }
        
        .mobile-menu.open {
            transform: translateX(0);
        }
        
        /* Loading spinner */
        .spinner {
            display: none;
            width: 24px;
            height: 24px;
            border: 3px solid var(--text-secondary);
            border-top: 3px solid var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Error message */
        .error-message {
            color: #dc2626;
            font-size: 0.875rem;
            margin-top: 0.25rem;
            display: none;
        }
        
        /* Improved mobile styles */
        @media (max-width: 640px) {
            .hero {
                padding-top: 4rem;
                padding-bottom: 4rem;
            }
            
            .search-filter {
                padding: 1rem;
            }
            
            .destination-card {
                height: 200px;
            }
            
            .booking-modal {
                padding: 1rem;
                width: 90%;
            }

            .mobile-menu {
                position: fixed;
                top: 0;
                right: 0;
                height: 100vh;
                width: 75%;
                max-width: 300px;
                background: var(--bg-primary);
                z-index: 1000;
                padding: 1rem;
                box-shadow: -4px 0 8px rgba(0, 0, 0, 0.2);
            }
            
            .search-filter .flex {
                flex-direction: column;
            }
            
            .search-filter input,
            .search-filter select {
                font-size: 0.9rem;
            }
        }