* {
    margin: 0;
    padding: 0;
}

html, body {
    background-color: #000;
    color: #fff;
    font-family: sans-serif;
    font-size: 32px;
}

body {
    height: 100vh;
    background-image: url(../img/explosion.jpg);
    background-repeat: no-repeat;
    background-position: left bottom;
}

h1, h2, h3 {
    font-size: 1em;
    text-align: center;
    text-transform: uppercase;
    line-height: 1.4em;
}

h1 {
    margin-top: 20px;
}


/* --> */

main {
    box-sizing: border-box;
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 420px;
    max-width: calc(100vw - 40px);
    max-height: calc(100vh - 40px);
    padding: 220px 20px 20px 20px;
    background-color: rgba(0, 0, 0, 0.6);
    background-image: url(../img/logo.png);
    background-repeat: no-repeat;
    background-position: center 20px;
    transform: translate(-50%, -50%);
}