* {
    margin: 0;
    padding: 0;

    box-sizing: border-box;

    /* h1 ~ h6 */
    font-size: inherit;
    font-weight: normal;

    /* ol ul */
    list-style: none;
}

button {
    all: unset;

    display: inline-block;

    box-sizing: border-box;

    cursor: pointer;
}

a {
    all: unset;

    cursor: pointer;
}

iframe {
    border: none;
}