.grid-container {
    display: grid;
    grid-template-areas:
        "header header header "
        "col1 col2 col3"
        "footer footer footer ";
    grid-template-columns: 1fr 1fr 1fr;
    gap: 3px;
    background-color: dodgerblue;
    padding: 5px;
}
.grid-container * {
    background-color: white;
    padding: 5px;
}
.grid-container header {
    grid-area: header;
}
.grid-container#col1 {
    grid-area: col1;
}
.grid-container#col2 {
    grid-area: col2;
}
.grid-container#col3 {
    grid-area: col3;
}
.grid-container footer {
    grid-area: footer;
}
.webcam {
    width: auto;
}
header * {
    display: inline;
}