.login-section {
    max-width: 400px;
    margin: 50px auto;
    padding: 25px;
    border: 2px solid;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-section #login-popup-title {
    margin-bottom: 20px;
    padding-bottom: 10px;
    text-align: center;
    width: 100%;
    font-size: 1.5em;
    border-bottom: #000 solid 2px;
}

.login-section form {
    width: 100%;
}

.login-section input[type=text],
.login-section input[type=password] {
    width: 100%;
    padding: 10px;
    margin-top: 15px;
    border: 2px solid;
    border-color: #000;
    background-color: transparent;
    box-sizing: border-box;
    text-align: center;
}

.login-section input[type=text]:focus,
.login-section input[type=password]:focus {
    background-color: #f1f1f1;
    outline: none;
}

.login-section .submit-button-container {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.submit-button-container .submit-login,
.submit-button-container .cancel-button {
    background-color: transparent;
    border: 2px solid #000;
    padding: 5px 15px;
    margin: 0 15px;
    cursor: pointer;
}

.submit-button-container .cancel-button {
    color: red;
}

.submit-button-container .submit-login {
    color: green;
}


#login-button {
    display: none;
}

#invalid {
    display: none;
    text-align: center;
    width: 100%;
    color: red;
    margin: 0;
}

#login-form.invalid #invalid {
    display: block;
}