.a\+header img, .a\+footer img   {
  border-radius: 1rem;
}
.a\+_icons {
    display: flex;
    flex-wrap: wrap;
    margin-top: 2rem;
    margin-bottom: 2rem;
}
.layer_system {
    display: flex;
    flex-wrap: wrap;
    margin-top: 2rem;
    margin-bottom: 2rem;
}
.left_top {
    display: flex;
    flex-wrap: wrap;
}
signature {
    display: block;
    font-style: italic;
    font-family: 'Merriweather';
}

@media (max-width:500px) {
    .icon.col-4 {
        width: 100%;
        text-align: center;
    }
    .left_box.col-9 {
        width: 100%;
    }
    .summary_box.col-3 {
      width: 100%;
    }
}