*,
*::before,
*::after,
*::placeholder {
    margin: 0;
    padding: 0;
    opacity: 1;
    outline: none;
    border: none;
    box-sizing: border-box;
    background: none;
    font: inherit;
    color: inherit;
    line-height: 1.5;
    text-decoration: none;
    list-style: none;
}

*::-moz-focus-outer,
*::-moz-focus-inner {
    border: none;
}

iframe {
    display: block;
}