.serial, .dv_number {
        border: #0ba360 solid 1px;
        box-shadow: none;
        color: #0ba360;
        font-weight: bold;
        padding: 5px;
        margin-right: 2px;
        margin-left: 5px;
        border-radius: 5px;
    }
    .submit-form {
        margin: auto;
    }
    .bg-gray {
        background-color: #4e555b;
        color: white;
        border-color: #4e555b;
    }
    .modal-backdrop {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        background-color: rgba(0, 0, 0, 0.3);
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .modal {
        background: #ffffff;
        box-shadow: 2px 2px 20px 1px;
        overflow-x: auto;
        display: flex;
        flex-direction: column;
        margin-top: 50px;
    }
    .modal-header, .modal-footer {
        padding: 15px;
        display: flex;
    }
    .modal-title {
        color: gray;
    }
    .modal-header {
        border-bottom: 1px solid #eeeeee;
        color: #4aae9b;
        justify-content: space-between;
    }
    .modal-footer {
        border-top: 1px solid #eeeeee;
        justify-content: flex-end;
    }
    .modal-body {
        position: center;
        padding: 20px 10px;
    }
    .btn-close {
        border: none;
        font-size: 20px;
        padding: 20px;
        cursor: pointer;
        font-weight: bold;
        color: #4aae9b;
        background: transparent;
    }
    .btn-green {
        color: white;
        background: #4aae9b;
        border: 1px solid #4aae9b;
        border-radius: 2px;
    }