html, body{ 
    width: 100%;
    height: 100%;
    font-size: 0.95em;
    box-sizing: border-box;
    background: #f0f0f0;
}

body {
    margin: 0;
    padding: 0;
}

.section_top {
    display: flex;
    /* width: 100%; */
    height: 100%;
}

#content {
    height: 100%;
}