body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Verdana, Tahoma, Helvetica, sans-serif;
    font-size: 10pt;
}
.center-box {
    width: 80%;
    max-width: 760px;
    padding: 1em;
    text-align: center;
}
.logo-maintenance {
    margin-bottom: 4em;
}
.logo {
    width: 50%;
}
.text-maintenance {
    font-size: 1.2em;
    color: #0079B3;
}
.text-body {
    line-height: 1.3em;
    color: #404040;
    text-align: justify;
}
.text-signature {
    text-align: right;
}
ul {
    text-align: left;
}
ul li {
    margin-bottom: 0.5em;
}