body {
        margin: 0;
        padding: 0;
        overflow-x: hidden;
    }
    
    .content-wrapper.auth {
        background: linear-gradient(135deg, #1e3a5f 0%, #2c5282 50%, #17a2b8 100%);
        position: relative;
        min-height: 100vh;
        overflow: hidden;
    }
    
    .content-wrapper.auth::before {
        content: '';
        position: absolute;
        width: 200%;
        height: 200%;
        background: 
            radial-gradient(circle at 20% 50%, rgba(255, 140, 0, 0.15) 0%, transparent 50%),
            radial-gradient(circle at 80% 80%, rgba(23, 212, 217, 0.2) 0%, transparent 50%),
            radial-gradient(circle at 40% 20%, rgba(44, 82, 130, 0.3) 0%, transparent 50%);
        animation: gradientShift 15s ease infinite;
    }
    
    @keyframes gradientShift {
        0%, 100% { transform: translate(0, 0) rotate(0deg); }
        33% { transform: translate(-5%, -5%) rotate(120deg); }
        66% { transform: translate(5%, 5%) rotate(240deg); }
    }
    
    /* Floating particles */
    .content-wrapper.auth::after {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background-image: 
            radial-gradient(2px 2px at 20% 30%, white, transparent),
            radial-gradient(2px 2px at 60% 70%, white, transparent),
            radial-gradient(1px 1px at 50% 50%, white, transparent),
            radial-gradient(1px 1px at 80% 10%, white, transparent),
            radial-gradient(2px 2px at 90% 60%, white, transparent);
        background-size: 200% 200%;
        animation: particles 20s linear infinite;
        opacity: 0.4;
    }
    
    @keyframes particles {
        0% { background-position: 0% 0%; }
        100% { background-position: 100% 100%; }
    }
    
    /* Modern Card with Glassmorphism */
    .auth-form-light {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-radius: 24px;
        box-shadow: 
            0 20px 60px rgba(0, 0, 0, 0.3),
            0 0 0 1px rgba(255, 255, 255, 0.1) inset;
        border: 1px solid rgba(255, 255, 255, 0.2);
        position: relative;
        z-index: 1;
        opacity: 0;
        transform: translateY(30px) scale(0.95);
        animation: slideInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
        animation-delay: 0.2s;
    }
    
    @keyframes slideInUp {
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }
    
    /* Logo Animation */
    .brand-logo {
        text-align: center;
        margin-bottom: 2rem;
        opacity: 0;
        animation: fadeIn 0.6s ease forwards;
        animation-delay: 0.5s;
    }
    
    .brand-logo img {
        transition: transform 0.3s ease;
        filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    }
    
    .brand-logo img:hover {
        transform: scale(1.05);
    }
    
    @keyframes fadeIn {
        to { opacity: 1; }
    }
    
    /* Heading Animations */
    h4 {
        font-weight: 700;
        color: #2d3748;
        margin-bottom: 0.5rem;
        opacity: 0;
        animation: fadeInSlide 0.6s ease forwards;
        animation-delay: 0.7s;
    }
    
    h6 {
        color: #718096;
        font-weight: 400;
        opacity: 0;
        animation: fadeInSlide 0.6s ease forwards;
        animation-delay: 0.8s;
    }
    
    @keyframes fadeInSlide {
        from {
            opacity: 0;
            transform: translateX(-10px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }
    
    /* Form Animations */
    .pt-3 {
        opacity: 0;
        animation: fadeIn 0.6s ease forwards;
        animation-delay: 0.9s;
    }
    
    /* Modern Input Fields */
    .form-control {
        border: 2px solid #e2e8f0;
        border-radius: 12px;
        padding: 14px 20px;
        font-size: 15px;
        transition: all 0.3s ease;
        background: #f7fafc;
    }
    
    .form-control:focus {
        border-color: #17a2b8;
        box-shadow: 0 0 0 4px rgba(23, 162, 184, 0.15);
        background: white;
        transform: translateY(-2px);
    }
    
    .form-control:hover {
        border-color: #cbd5e0;
        background: white;
    }
    
    /* Form Group Animation */
    .form-group {
        opacity: 0;
        animation: fadeInUp 0.5s ease forwards;
    }
    
    .form-group:nth-child(2) {
        animation-delay: 1s;
    }
    
    .form-group:nth-child(3) {
        animation-delay: 1.1s;
    }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    /* Modern Button - Xepay Cyan */
    .btn-primary {
        background: linear-gradient(135deg, #17d4d9 0%, #0ea5e9 100%);
        border: none;
        border-radius: 12px;
        padding: 14px 28px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        transition: all 0.3s ease;
        box-shadow: 0 10px 25px rgba(23, 212, 217, 0.3);
        position: relative;
        overflow: hidden;
    }
    
    .btn-primary::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
        transition: left 0.5s ease;
    }
    
    .btn-primary:hover::before {
        left: 100%;
    }
    
    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 35px rgba(23, 212, 217, 0.4);
        background: linear-gradient(135deg, #0ea5e9 0%, #17d4d9 100%);
    }
    
    .btn-primary:active {
        transform: translateY(-1px);
    }
    
    .mt-3 {
        opacity: 0;
        animation: fadeInUp 0.5s ease forwards;
        animation-delay: 1.2s;
    }
    
    /* Alert Styles */
    .alert {
        border-radius: 12px;
        border: none;
        padding: 16px 20px;
        margin-bottom: 1.5rem;
        position: relative;
        animation: slideInDown 0.5s ease;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    
    @keyframes slideInDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .alert-danger {
        background: linear-gradient(135deg, #fff5f5 0%, #ffe5e5 100%);
        color: #dc2626;
        border-left: 4px solid #dc2626;
    }
    
    .alert-danger::after {
        content: '⚠';
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 24px;
    }
    
    .alert-success {
        background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
        color: #16a34a;
        border-left: 4px solid #16a34a;
    }
    
    .alert-success::after {
        content: '✓';
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 24px;
    }
    
    .alert .close {
        opacity: 0.6;
        transition: opacity 0.3s ease;
    }
    
    .alert .close:hover {
        opacity: 1;
    }
    
    /* Password Toggle */
    .password-toggle-login {
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        cursor: pointer;
        color: #a0aec0;
        font-size: 18px;
        z-index: 10;
        transition: all 0.3s ease;
    }
    
    .password-toggle-login:hover {
        color: #17a2b8;
        transform: translateY(-50%) scale(1.1);
    }
    
    .position-relative {
        position: relative;
    }
    
    /* Responsive adjustments */
    @media (max-width: 768px) {
        .auth-form-light {
            padding: 2rem 1.5rem !important;
        }
        
        .col-lg-4 {
            padding: 0 15px;
        }
    }
    
    /* Loading state for button */
    .btn-primary:active {
        background: linear-gradient(135deg, #0891b2 0%, #0284c7 100%);
    }