.header {
  height: 55px;
  
  display: flex;
  flex-direction: row;
  justify-content: right;

  position: fixed;
  left: 250px;
  right: -3px;
  padding-left: 80px;
  z-index: 10000;
}

.night-button {
  margin-top: 7px;
  margin-right: 20px;
  height: 45px;
  width: 45px;
  font-size: 26px;
  background-color: transparent;
  border-width: 0;
  border-radius: 10px;
  padding-top: 4px;
  cursor: pointer;
  transition: box-shadow .2s;
}

.night-button:hover {
  box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.15);
}

.night-button:active {
  opacity: 0.6;
}