body {
            background: url('/bg.jpg') no-repeat center center fixed;
            background-size: cover;
            font-family: 'Poppins', sans-serif;
            color: #333;
        }
        .form-container {
            max-width: 600px;
            margin: 40px auto;
            background: linear-gradient(135deg, #f6f8fa, #e8eaf0);
            border-radius: 15px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
            padding: 30px 20px;
        }
        .banner {
            text-align: center;
            margin-bottom: 20px;
        }
        .banner img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }
        .form-title {
            text-align: center;
            font-size: 1.8rem;
            font-weight: 700;
            margin: 20px 0;
            color: #2a5fc1;
        }
        .material-input {
            position: relative;
            margin-bottom: 20px;
        }
        .material-input input {
            width: 100%;
            padding: 14px 45px 14px 40px;
            border: 1px solid white;
            border-radius: 50px;
            font-size: 16px;
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .material-input input:focus {
            outline: none;
            border-color: #2a5fc1;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
        }
        .material-input label {
            position: absolute;
            top: 50%;
            left: 40px;
            font-size: 14px;
            color: #999;
            pointer-events: none;
            transform: translateY(-50%);
            transition: 0.2s ease all;
        }
        .material-input input:focus + label,
        .material-input input:not(:placeholder-shown) + label {
            top: 10px;
            left: 40px;
            font-size: 12px;
            color: #2a5fc1;
            background: white;
            padding: 0 4px;
        }
        .material-input .icon {
            position: absolute;
            top: 50%;
            left: 15px;
            transform: translateY(-50%);
            color: #2a5fc1;
            font-size: 20px;
        }
        button[type="submit"], #submit-btn, #otp-submit {
            font-size: 16px;
            font-weight: 500;
            padding: 12px 20px;
            border-radius: 30px;
            background: linear-gradient(135deg, #2a5fc1, #3271e7);
            color: white;
            border: none;
            transition: background 0.3s;
        }
        button[type="submit"]:hover, #submit-btn:hover, #otp-submit:hover {
            background: linear-gradient(135deg, #3271e7, #2a5fc1);
        }