* {
    box-sizing: border-box;
}

body {
    margin: 0;
    /*padding:0;*/
    font-family: Arial, sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden; /* <--- Remova overflow-x: hidden se não for necessário */
    /*background-color: #f4f4f4;*/
    /*background: radial-gradient(circle, #195ccf 0%, #0a0f1a 100%);*/
    color: #eee;
    height:100vh;
    overflow:hidden;
    background: radial-gradient(circle at center, #1856c5 0%, #05b 100%);
}

/* Logo central */
.logo {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 500px;
    transform: translate(-50%, -50%);
    z-index: 1;
    
    opacity: 0.5;
}

/* Centro com rolagem vertical */
#center {
    margin-top: 50px;
    margin-bottom: 50px;
    overflow-y: auto;
    display: block;
    z-index: 5;
}

a, a:visited {
    color: #ccc;
}
a:hover, a:active, a:link {
    color: #fff;
    text-decoration: none;
}

.mb-15 {
    margin-bottom: 15px;
}


.right {
    float: right;
}


@media (max-width: 800px) {

    .logo {
        width: 300px;
    }
}