element-call-Github/src/Header.module.css

.header {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 64px;
  user-select: none;
  flex-shrink: 0;
}

.leftNav {
  position: absolute;
  left: 20px;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.rightNav {
  position: absolute;
  right: 20px;
  max-width: 33%;
  white-space: nowrap;
  display: flex;
}

.userName {
  font-weight: 600;
  margin-right: 8px;
  text-overflow: ellipsis;
  overflow: hidden;
  flex-shrink: 1;
}

.signOutButton {
  background: transparent;
  border: none;
  color: rgb(255, 75, 85);
  cursor: pointer;
  font-weight: 600;
  flex-shrink: 0;
}

@media(min-width: 800px) {
  .header {
    height: 98px;
  }
}