*,
body {
    padding: 0;
    margin: 0;
}

header {
    background-color: rgba(26, 26, 26, 1);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

header.notification-icon {
    background-color: rgba(48, 48, 48, 1);
}