/* feedback box */
.feedback-box {
    transition: visibility 500ms ease-in-out;
    display: none;

    /* position */
    position: fixed;
    top: 5rem;
    left: 50%;
    transform: translate(-50%, 0);

    /* text */
    text-align: center;
    font-family: var(--main-font), sans-serif;
    font-size: 1.25rem;
    line-height: 4rem;

    /* no select */
    -webkit-user-select: none; /* Safari */
    -ms-user-select: none; /* IE 10 and IE 11 */
    user-select: none; /* Standard syntax */

    /* color */
    background-color: var(--green);
    color: var(--white);

    /* size */
    height: 4rem;
    border-radius: 4rem;
    padding: 0 1rem;

    width: 60%;
    max-width: var(--page-w);

    /* z index */
    z-index: 1030;
}