body {
        background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
        min-height: 100vh;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        position: relative;
        overflow-x: hidden;
    }
    
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: 
            radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.4) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.4) 0%, transparent 50%),
            radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
            radial-gradient(circle at 60% 60%, rgba(0, 150, 255, 0.3) 0%, transparent 40%),
            radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.2) 0%, transparent 30%),
            radial-gradient(circle at 10% 90%, rgba(0, 180, 255, 0.2) 0%, transparent 35%);
        z-index: 1;
    }
    
    body::after {
        content: '';
        position: fixed;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: 
            linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.15) 50%, transparent 60%),
            linear-gradient(-45deg, transparent 40%, rgba(255, 255, 255, 0.15) 50%, transparent 60%),
            linear-gradient(135deg, transparent 30%, rgba(0, 150, 255, 0.1) 50%, transparent 70%),
            linear-gradient(-135deg, transparent 30%, rgba(0, 150, 255, 0.1) 50%, transparent 70%);
        animation: moveBackground 20s infinite linear;
        z-index: 1;
    }
    
    @keyframes moveBackground {
        0% { transform: translateX(-50%) translateY(-50%) rotate(0deg); }
        100% { transform: translateX(-50%) translateY(-50%) rotate(360deg); }
    }
    
    /* Power Bank Floating Elements */
    .floating-elements {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 2;
    }
    
    .floating-elements::before,
    .floating-elements::after {
        content: '';
        position: absolute;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(0, 150, 255, 0.3));
        border-radius: 15px;
        animation: float 15s infinite ease-in-out;
        box-shadow: 
            0 0 40px rgba(255, 255, 255, 0.5),
            inset 0 0 20px rgba(0, 150, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.3);
    }
    
    .floating-elements::before {
        width: 120px;
        height: 60px;
        top: 15%;
        left: 8%;
        animation-delay: 0s;
    }
    
    .floating-elements::after {
        width: 100px;
        height: 50px;
        top: 70%;
        right: 10%;
        animation-delay: -7s;
    }
    
    /* Additional Power Bank Elements */
    .power-bank-elements {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 2;
    }
    
    .power-bank {
        position: absolute;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(0, 150, 255, 0.2));
        border-radius: 10px;
        animation: powerBankFloat 12s infinite ease-in-out;
        box-shadow: 
            0 0 30px rgba(255, 255, 255, 0.4),
            inset 0 0 15px rgba(0, 150, 255, 0.2);
        border: 2px solid rgba(255, 255, 255, 0.3);
    }
    
    .power-bank:nth-child(1) {
        width: 80px;
        height: 40px;
        top: 25%;
        right: 15%;
        animation-delay: 0s;
    }
    
    .power-bank:nth-child(2) {
        width: 90px;
        height: 45px;
        top: 60%;
        left: 12%;
        animation-delay: -4s;
    }
    
    .power-bank:nth-child(3) {
        width: 70px;
        height: 35px;
        top: 80%;
        right: 8%;
        animation-delay: -8s;
    }
    
    .power-bank:nth-child(4) {
        width: 85px;
        height: 42px;
        top: 10%;
        left: 20%;
        animation-delay: -6s;
    }
    
    @keyframes powerBankFloat {
        0%, 100% { transform: translateY(0px) rotate(0deg) scale(1); }
        25% { transform: translateY(-30px) rotate(3deg) scale(1.1); }
        50% { transform: translateY(-60px) rotate(0deg) scale(1); }
        75% { transform: translateY(-30px) rotate(-3deg) scale(1.1); }
    }
    
    @keyframes float {
        0%, 100% { transform: translateY(0px) rotate(0deg); }
        25% { transform: translateY(-20px) rotate(5deg); }
        50% { transform: translateY(-40px) rotate(0deg); }
        75% { transform: translateY(-20px) rotate(-5deg); }
    }
    
    /* Circuit Pattern Background */
    .circuit-pattern {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        opacity: 0.25;
        z-index: 1;
        background-image: 
            linear-gradient(90deg, rgba(255,255,255,0.4) 1px, transparent 1px),
            linear-gradient(rgba(255,255,255,0.4) 1px, transparent 1px),
            linear-gradient(90deg, rgba(0,150,255,0.3) 1px, transparent 1px),
            linear-gradient(rgba(0,150,255,0.3) 1px, transparent 1px);
        background-size: 50px 50px, 50px 50px, 25px 25px, 25px 25px;
        background-position: 0 0, 0 0, 0 0, 12.5px 12.5px;
        animation: circuit 20s infinite linear;
    }
    
    .circuit-pattern::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: 
            radial-gradient(circle at 10% 20%, rgba(255,255,255,0.4) 2px, transparent 2px),
            radial-gradient(circle at 90% 80%, rgba(0,150,255,0.4) 2px, transparent 2px),
            radial-gradient(circle at 50% 50%, rgba(255,255,255,0.3) 1px, transparent 1px),
            radial-gradient(circle at 20% 60%, rgba(0,150,255,0.3) 1px, transparent 1px);
        background-size: 100px 100px, 120px 120px, 80px 80px, 90px 90px;
        animation: circuitDots 15s infinite linear;
    }
    
    @keyframes circuitDots {
        0% { background-position: 0 0, 0 0, 0 0, 0 0; }
        100% { background-position: 100px 100px, 120px 120px, 80px 80px, 90px 90px; }
    }
    
    @keyframes circuit {
        0% { background-position: 0 0; }
        100% { background-position: 50px 50px; }
    }
    
    /* Energy Particles */
    .energy-particles {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 2;
    }
    
    .particle {
        position: absolute;
        width: 8px;
        height: 8px;
        background: radial-gradient(circle, rgba(255, 255, 255, 1) 0%, rgba(0, 150, 255, 0.8) 50%, transparent 100%);
        border-radius: 50%;
        animation: particle 8s infinite linear;
        box-shadow: 
            0 0 15px rgba(255, 255, 255, 0.8),
            0 0 30px rgba(0, 150, 255, 0.4);
    }
    
    .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
    .particle:nth-child(2) { left: 20%; animation-delay: 1s; }
    .particle:nth-child(3) { left: 30%; animation-delay: 2s; }
    .particle:nth-child(4) { left: 40%; animation-delay: 3s; }
    .particle:nth-child(5) { left: 50%; animation-delay: 4s; }
    .particle:nth-child(6) { left: 60%; animation-delay: 5s; }
    .particle:nth-child(7) { left: 70%; animation-delay: 6s; }
    .particle:nth-child(8) { left: 80%; animation-delay: 7s; }
    .particle:nth-child(9) { left: 90%; animation-delay: 8s; }
    
    /* Additional Particle Effects */
    .lightning-bolts {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 2;
    }
    
    .lightning {
        position: absolute;
        width: 2px;
        height: 100px;
        background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), rgba(0, 150, 255, 0.6), transparent);
        animation: lightning 6s infinite;
        box-shadow: 
            0 0 10px rgba(255, 255, 255, 0.8),
            0 0 20px rgba(0, 150, 255, 0.4);
    }
    
    .lightning:nth-child(1) {
        left: 15%;
        top: 10%;
        animation-delay: 0s;
        transform: rotate(15deg);
    }
    
    .lightning:nth-child(2) {
        right: 20%;
        top: 30%;
        animation-delay: 2s;
        transform: rotate(-10deg);
    }
    
    .lightning:nth-child(3) {
        left: 25%;
        bottom: 20%;
        animation-delay: 4s;
        transform: rotate(25deg);
    }
    
    .lightning:nth-child(4) {
        right: 15%;
        bottom: 40%;
        animation-delay: 1s;
        transform: rotate(-20deg);
    }
    
    @keyframes lightning {
        0%, 90%, 100% { opacity: 0; transform: scale(1) rotate(var(--rotation, 0deg)); }
        5%, 10% { opacity: 1; transform: scale(1.2) rotate(var(--rotation, 0deg)); }
        15%, 20% { opacity: 0.7; transform: scale(0.9) rotate(var(--rotation, 0deg)); }
        25%, 30% { opacity: 1; transform: scale(1.1) rotate(var(--rotation, 0deg)); }
    }
    
    @keyframes particle {
        0% { 
            transform: translateY(100vh) scale(0);
            opacity: 0;
        }
        10% { 
            opacity: 1;
            transform: scale(1);
        }
        90% { 
            opacity: 1;
            transform: scale(1);
        }
        100% { 
            transform: translateY(-100vh) scale(0);
            opacity: 0;
        }
    }

    .login-box {
        width: 400px;
        margin: 7% auto;
        position: relative;
        z-index: 10;
    }
    
    .login-box-body {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(15px);
        border-radius: 25px;
        padding: 40px;
        box-shadow: 
            0 20px 40px rgba(0, 0, 0, 0.15),
            0 10px 20px rgba(0, 102, 204, 0.1),
            inset 0 1px 0 rgba(255, 255, 255, 0.3);
        border: 1px solid rgba(255, 255, 255, 0.3);
        position: relative;
        overflow: hidden;
    }
    
    .login-box-body::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transform: rotate(45deg);
        animation: shimmer 4s infinite;
    }
    
    .login-box-body::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: 
            radial-gradient(circle at 20% 20%, rgba(0, 150, 255, 0.05) 0%, transparent 50%),
            radial-gradient(circle at 80% 80%, rgba(0, 150, 255, 0.05) 0%, transparent 50%);
        z-index: 0;
        pointer-events: none;
    }
    
    @keyframes shimmer {
        0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
        100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
    }
    
    .login-logo {
        text-align: center;
        margin-bottom: 30px;
        position: relative;
        z-index: 1;
    }
    
    .login-logo img {
        max-width: 280px;
        height: auto;
        filter: drop-shadow(0 5px 15px rgba(0, 0, 0, 0.1));
    }
    
    .form-group {
        margin-bottom: 25px;
        position: relative;
        z-index: 1;
    }
    
    .form-group label {
        font-weight: 600;
        color: #333;
        margin-bottom: 8px;
        display: block;
        font-size: 14px;
    }
    
    .form-control {
        height: 50px;
        border: 2px solid #e1e5e9;
        border-radius: 10px;
        padding: 0 20px;
        font-size: 16px;
        transition: all 0.3s ease;
        background: rgba(255, 255, 255, 0.9);
        padding-left: 43px!important;
    }
    
    .form-control:focus {
        border-color: #0066cc;
        box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
        background: white;
        outline: none;
    }
    
    .form-control::placeholder {
        color: #a0a0a0;
        font-size: 14px;
    }
    
    .btn-success {
        background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
        border: none;
        height: 50px;
        border-radius: 10px;
        font-size: 16px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1px;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
        z-index: 1;
    }
    
    .btn-success::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transition: left 0.5s;
    }
    
    .btn-success:hover::before {
        left: 100%;
    }
    
    .btn-success:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 20px rgba(0, 102, 204, 0.3);
    }
    
    .text-danger {
        color: #e74c3c;
        font-size: 12px;
        margin-top: 5px;
    }
    
    .login-title {
        text-align: center;
        margin-bottom: 30px;
        position: relative;
        z-index: 1;
    }
    
    .login-title h2 {
        color: #333;
        font-size: 28px;
        font-weight: 700;
        margin-bottom: 5px;
    }
    
    .login-title p {
        color: #666;
        font-size: 14px;
        margin: 0;
    }
    
    .form-group.has-feedback {
        position: relative;
    }
    
    .form-group.has-feedback .form-control {
        padding-left: 50px;
    }
    
    .form-group.has-feedback .input-icon {
        position: absolute;
        left: 15px;
        top: 50%;
        transform: translateY(-50%);
        color: #0066cc;
        font-size: 30px;
        z-index: 3;
        pointer-events: none;
    }
    
    .form-group.has-feedback .fa-user {
        top: 52px;
    }
    
    .form-group.has-feedback .fa-lock {
        top: 52px;
    }
    
    @media (max-width: 480px) {
        .login-box {
            width: 95%;
            margin: 5% auto;
        }
        
        .login-box-body {
            padding: 30px 20px;
        }
        
        .login-logo img {
            max-width: 250px;
        }
    }