@-webkit-keyframes brightness {
    0%  { filter: brightness(100%); }
    5% { filter: brightness(200%); }
    100%  { filter: brightness(100%); }
}

@-webkit-keyframes bkg {
    0%  { background-color: #000000c0; }
    2%  { background-color: #ff0000c0; }
    33%  { background-color: #000000c0; }
    100%  { background-color: #000000c0; }
}

* {
    box-sizing: border-box;
}

.logo-box {
    position: fixed;
    margin: auto;
    -webkit-animation: bkg 9s infinite;
    padding: 10px;
    border-radius: 5px;
    top: 20px;
    left: 50%;
    transform: translate(-50%, 0);
}

.logo img {
    -webkit-animation: brightness 3s infinite;
}

.icons {
    display: flex;
    justify-content: center;
}

.icons img {
    margin-left: 3px;
}


body {
    margin: 0;
}

.header {
    text-align: center;
    padding: 32px;
}
.row {
    display: flex;
    flex-wrap: wrap;
    padding: 0 4px;
}

/* Create four equal columns that sits next to each other */
.column {
    flex: 25%;
    max-width: 25%;
    padding: 0 4px;
}

.column img {
    margin-top: 8px;
    vertical-align: middle;
    width: 100%;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 800px) {
    .column {
        flex: 50%;
        max-width: 50%;
    }
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
    .column {
        flex: 100%;
        max-width: 100%;
    }
}