MyHome/primary/static/style.css

body {
  margin: 0 0 0 0;
}

.header {
  height: 4rem;
  width: 100%;
  z-index: 10;
  display: flex;
  flex-direction: row;
  justify-content: start;
  align-items: center;
  background-color: #3b90c6;
  color: #ffffff;
}

.header-left {
  margin-left: 1rem;
}