* {
    box-sizing: border-box;
}

html {
    background: white;
}

body {
    width: 94%;
    max-width: 700px;
    min-height: 420px;
    margin: 60px auto;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;

    color: #111;
    background: white;

    border: 2px solid #3b5998;
}

body::before {
    content: "University Registration";

    display: block;

    background-color: #3b5998;
    color: white;

    font-size: 16px;
    font-weight: bold;

    padding: 9px 12px;

    border-bottom: 2px solid #1d4088;
}

form {
    width: 100%;

    padding: 35px 30px;

    display: flex;
    flex-direction: column;

    gap: 14px;
}

select,
input {
    width: 100%;
    height: 34px;

    padding: 5px 8px;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;

    background: white;

    border: 1px solid #777;
}

select:focus,
input:focus {
    outline: 1px solid #3b5998;
}

button {
    width: 110px;

    align-self: center;

    margin-top: 10px;

    padding: 6px 14px;

    border: 1px solid #1d4088;

    background-color: #5b7db1;
    color: white;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: bold;

    cursor: pointer;
}

button:hover {
    background-color: #3b5998;
}


@media (max-width: 650px) {

    body {
        width: calc(100% - 20px);
        margin: 20px auto;
    }

    form {
        padding: 25px 18px;
    }

}


@media (max-width: 420px) {

    body {
        margin: 10px auto;
    }

    body::before {
        font-size: 14px;
    }

    select,
    input {
        font-size: 13px;
    }

    button {
        width: 100%;
    }

}

.alert {
    width: 100%;
    margin-bottom: 12px;
    padding: 8px 10px;

    font-size: 13px;
    font-weight: bold;

    text-align: left;

    display: none;
}


.alert.error {
    display: block;

    color: #8b0000;
    background-color: #ffecec;

    border: 1px solid #cc6666;
}


.alert.success {
    display: block;

    color: #1f5f1f;
    background-color: #eef8ee;

    border: 1px solid #6eaa6e;
}