style.css

#header {
    width: 100%;
    height: 5vh;
    margin: 0;
    display: flex;
    justify-content: space-between;
    color: black;
}

#base {
    width: 100%;
    height: 5vh;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: left;
    position: fixed;
    top: 0;
    left: 0;
}

#source-base {
    display: flex;
    justify-content: right;
    align-items: center;
}

.source-chip {
    margin-left: 0.5vw;
    margin-right: 0.5vw;
    padding: 10px;
    display: flex;
    align-items: center;
    border-bottom: 3px solid blue;
}