.middle-block {
    padding: 100px 0 0 0;
}

.form {
    background: var(--color-white);
    max-width: 500px;
    margin: 0 auto;
    padding: 20px 40px;
    border-radius: 6px;
    box-shadow: 0 0 20px #ddd;
    border: 1px solid #ddd;
}

input[type=email], input[type=text] , input[type=password]{
    padding: 10px 20px;
    min-width: 200px;
    width: 100%;
    margin: 10px 0;
    border-radius: 3px;
    border: 1px solid var(--color-gray);
}
input[type=checkbox]{
    padding: 10px 20px;
    margin: 10px 10px;
    border-radius: 3px;
    border: 1px solid #636772;
}

.remember_me {

}

.submit {
    display: block;
    background: var(--color-blue-light);
    max-width: 200px;
    width: 80%;
    margin: 10px auto;
    padding: 6px 10px;
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--color-blue);
    font-size: var(--button-text-size);
    transition: background 0.8s;
}
.submit:hover {
    background: var(--color-blue);
}

.error {
    border: 2px dashed var(--color-red);
    background: var(--color-red-bg);
    padding: 20px;
}

@media only screen and (max-width: 500px) {
    .form {
        box-shadow: none;
        padding: 20px 20px;
    }
}

@media only screen and (max-height: 700px) {
    .middle-block {
        padding: 20px 0 0 0;
    }
}