/*
body {
    position: relative;
    width: 100%;
    margin: 0;
    background-image: url(blue);
    height: 100vh;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    overflow: hidden;
}
*/
body {
    width: 950px;
    display: block;
    margin: auto;
}

* {
    font-family: 'Roboto', sans-serif;
}

.page {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    align-content: center;
    flex-direction: column;
    padding: 20px;
    padding-top: 70px;
    box-sizing: border-box;
    overflow-y: auto;
}

.page>* {
    margin: auto;
}
.boite{  
    width: 800px;
    margin-bottom: 5px;
    border: 3px solid #999999 ;
    height:200px;
}