body {
            box-sizing: border-box;
        }
        
        .dark {
            color-scheme: dark;
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        
        .dark-gradient-bg {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        }
        
        .service-card {
            transition: all 0.3s ease;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
        }
        
        .dark .service-card:hover {
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }
        
        .plus-button {
            position: relative;
            overflow: hidden;
        }
        
        .plus-button::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: width 0.3s ease, height 0.3s ease;
        }
        
        .plus-button:hover::before {
            width: 300px;
            height: 300px;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes slideUp {
            from { opacity: 0; transform: translateY(50px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes slideInLeft {
            from { opacity: 0; transform: translateX(-50px); }
            to { opacity: 1; transform: translateX(0); }
        }
        
        @keyframes slideInRight {
            from { opacity: 0; transform: translateX(50px); }
            to { opacity: 1; transform: translateX(0); }
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }
        
        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        @keyframes bounce {
            0%, 20%, 53%, 80%, 100% { transform: translateY(0); }
            40%, 43% { transform: translateY(-30px); }
            70% { transform: translateY(-15px); }
            90% { transform: translateY(-4px); }
        }
        
        .animate-fade-in {
            animation: fadeIn 1s ease-out;
        }
        
        .animate-slide-up {
            animation: slideUp 1s ease-out 0.3s both;
        }
        
        .animate-slide-left {
            animation: slideInLeft 1s ease-out;
        }
        
        .animate-slide-right {
            animation: slideInRight 1s ease-out;
        }
        
        .animate-pulse-custom {
            animation: pulse 2s infinite;
        }
        
        .animate-spin-slow {
            animation: spin 3s linear infinite;
        }
        
        .animate-bounce-custom {
            animation: bounce 2s infinite;
        }
        
        .hero-slider {
            background: linear-gradient(45deg, #667eea, #764ba2, #f093fb, #f5576c);
            background-size: 400% 400%;
            animation: gradientShift 8s ease infinite;
        }
        
        .dark .hero-slider {
            background: linear-gradient(45deg, #1a1a2e, #16213e, #0f3460, #533483);
            background-size: 400% 400%;
        }
        
        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        .flash-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out;
        }
        
        .logo-animation {
            animation: bounce 2s ease-in-out infinite;
        }
        
        .testimonial-card {
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }
        
        .testimonial-card:hover {
            transform: scale(1.05);
        }
        
        .client-logo {
            filter: grayscale(100%);
            transition: filter 0.3s ease;
        }
        
        .client-logo:hover {
            filter: grayscale(0%);
        }
        
        .dark .client-logo {
            filter: grayscale(100%) brightness(0.8);
        }
        
        .dark .client-logo:hover {
            filter: grayscale(0%) brightness(1);
        }

         .dropdown {
            position: relative;
        }
        
        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            z-index: 50;
            min-width: 200px;
        }
        
        .dark .dropdown-menu {
            background: #374151;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
        }
        
        .dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }