html, body {
height: 100%;
margin: 0;
padding: 0;
}
.cp #mainBlock {
z-index: 1;
height: 100%;
width: 1000px;
max-width: 90%;
margin: auto;
display: flex;
align-items: center;
justify-content: center;
}
.cp #mainBlock #container {
text-align: center;
font-size: 25px;
}