/* CSS Reset */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Altro CSS */
img{
    display: none;
}
.avviso-width{
    display: none;
}
body{
    background-color: #000;
    color: #0f0;
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}
header{
    background-color: #444;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    z-index: 9999;
}
.btn-homepage{
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    cursor: pointer;
    text-align: center;
    font-size: 10px;
    width: 90px;
    height: 100px;
    padding: 10px;
}
.logo{
    display: block;
    height: 70px;
    margin-bottom: 4px;
}
.btn-torna-indietro{
    display: flex;
    position: absolute;
    top: 0;
    left: 0;
    cursor: pointer;
    text-align: center;
    justify-content: center;
    border: #000 solid 2px;
    border-radius: 25px;
    font-size: 20px;
    width: 200px;
    height: 50px;
    margin: 25px;
    padding: 15px;
}
.background {
    position: relative;
    height: 100%;
}
.background::before {
    content: "";
    background-image: url(img/cover.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: calc(100vh - 100px);
    margin-top: 100px;
    opacity: 0.2;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: -1;
}
.background::after {
    content: "";
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    opacity: 1;
    display: block;
}
.body {  /* Volontariamente con il punto */
    position: relative;
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    margin-top: 50vh;
    z-index: 1;
}
.avviso{
    color: #f00;
    font-size: 30px;
    font-weight: bold;
    width: 100%;
    margin-top: 50px;
    margin-bottom: 20px;
}
button{
    background-color: #444;
    border: none;
}
button:hover{
    transition: 1s;
    background-color: #0f0;
}
p{
    margin-bottom: 10px;
}
a{
    color: #a8ff85;
    font-weight: bold;
}

/* Ridimensionamenti width */
@media only screen and (max-width: 360px) {
    header, .body, .avviso{
        display: none;
    }
    .avviso-width {
        display: block;
        background-color: #f00;
        color: #fff;
        font-size: 15px;
        text-align: center;
        margin-top: 100px;
        padding: 10px;
    }
}
@media only screen and (max-width: 300px) {
    .avviso-width{
        font-size: 10px;
    }
}