body {
            margin: 0;
            font-family: 'Montserrat', sans-serif;
            min-height: 100dvh;
            background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
            color: #e0e0e0;
        }

        .auth-container {
            background: linear-gradient(145deg, #1e1e1e, #2a2a2a);
            border-radius: 16px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
            width: 100%;
            max-width: 420px;
            text-align: center;
            border: 1px solid #444;
            animation: fadeIn 0.8s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .image-banner {
            min-height: 200px;
            position: relative;
            overflow: hidden;
        }

        .image-banner img {
            width: 100%;
            object-fit: cover;
        }

        .form-content {
            padding: 25px;
            flex-grow: 1;
        }

        .welcome-message {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 25px;
            color: #fcc010;
        }

        .form-control {
            background-color: #2b2b2b;
            border: 1px solid #444;
            border-radius: 8px;
            font-size: 16px;
            color: #e0e0e0;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .form-control::placeholder {
            color: #888;
        }

        .form-control:focus {
            border-color: #fcc010;
            box-shadow: 0 0 0 0.25rem rgba(252, 192, 16, 0.2);
            background-color: #333;
            color: #fff;
        }

        .signup-button {
            background: linear-gradient(145deg, #ffd700, #ffaa00);
            color: #1a1a1a;
            border: none;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 600;
            letter-spacing: 0.5px;
            transition: background-color 0.3s ease, transform 0.1s ease;
        }

        .signup-button:hover {
            background-color: #ffc109;
            transform: translateY(-2px);
        }

        .signup-button:active {
            transform: translateY(0);
        }
        .footer-text {
            color: #888;
            font-size: 12px;
            text-align: center;
        }

        .login-text {
            margin-top: 25px;
            font-size: 15px;
            color: #aaa;
        }

        .login-link {
            color: #fcc010;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s;
        }

        .login-link:hover {
            color: #ffc109;
            text-decoration: underline;
        }


        .alert.alert-danger, .alert.alert-success {
            padding: 10px;
            margin-bottom: 20px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
        }

        .alert.alert-danger {
            background-color: #dc3545;
            border: 1px solid #b02a37;
        }

        .alert.alert-success {
            background-color: #28a745;
            border: 1px solid #1e7e34;
        }

        .required {
            color: #dc3545;
        }

        .form-check-label {
            color: #e0e0e0;
            font-size: 14px;
            font-weight: 500;
        }

        .dropdown-toggle {
            text-align: left;
            background-color: #2b2b2b;
            border: 1px solid #444;
            border-radius: 16px;
            color: #e0e0e0;
            padding: 15px;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .dropdown-toggle:focus {
            background-color: #333;
            border-color: #fcc010;
            box-shadow: 0 0 0 0.25rem rgba(252, 192, 16, 0.2);
            color: #fff;
        }

        .dropdown-menu {
            width: 100%;
            border-radius: 16px;
            background-color: #2b2b2b;
            border: 1px solid #444;
        }

        .dropdown-item {
            color: #e0e0e0;
            padding: 12px 20px;
            transition: background-color 0.2s;
        }

        .dropdown-item:hover {
            background-color: #444;
            color: #fff;
        }

        .modal-content {
            background-color: #1a1a1a;
            border: 1px solid #333;
            border-radius: 10px;
            color: #e0e0e0;
        }

        .modal-header {
            border-bottom: 1px solid #444;
        }

        .modal-footer {
            border-top: 1px solid #444;
        }

        .modal-title {
            color: #fcc010;
        }

        .modal-dialog {
            max-width: 450px;
            width: 100%;
        }

        .otp-inputs {
            display: flex;
            gap: 10px;
            justify-content: center;
        }

        .otp-input {
            width: 50px;
            height: 50px;
            text-align: center;
            font-size: 20px;
            background-color: #2b2b2b;
            border: 1px solid #444;
            border-radius: 10px;
            color: #e0e0e0;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .otp-input:focus {
            background-color: #333;
            border-color: #fcc010;
            box-shadow: 0 0 0 0.25rem rgba(252, 192, 16, 0.2);
            color: #fff;
        }

        @media (max-width: 480px) {
            body {
                padding: 0;
                background: #1a1a1a;
            }
            .auth-container {
                border-radius: 0;
                box-shadow: none;
                min-height: 100dvh;
                max-width: 100%;
                border: none;
            }
            .form-content {
                min-height: calc(100vh - 270px);
                padding: 15px 25px;
                flex-grow: 1;
                background: linear-gradient(rgba(26, 26, 26, 0.85), rgba(26, 26, 26, 0.85          )), 
                            url('https://envorobo.com/public/image/Live GPS Map.png') no-repeat center center;
                background-size: cover;
            }
            .welcome-message {
                font-size: 24px;
                margin-bottom: 20px;
            }
            .signup-button {
                font-size: 17px;
            }
        }