.nav {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: row;
  font-weight: 500;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.5);
  background: transparent;
  /* background-color: white; */
  z-index: 40; /* needs to be higher than img */

  justify-content: space-between;
  padding: 0.25rem 0;
  margin-bottom: 1.5rem;
}

.nav-btn {
  font-size: 18px;
  padding: 8px 1rem;
  margin-left: 1rem;
  text-decoration: none;
  color: black;
  border-radius: 0.5rem;
  background-color: white;
  box-shadow: rgba(0, 0, 0, 0.16) 0px 1px 4px 0px;
}

/* https://csshint.com/css-box-shadow-examples/ */
.nav-shadow {
  box-shadow: rgba(0, 0, 0, 0.16) 0px 1px 4px 0px;
}

.nav-logo {
  margin-left: 1rem;
  margin-top: 1px;
}

.nav-btn-selected {
  background-color: rgba(255, 240, 0, 1);
}

.nav-btn:hover {
  background-color: rgba(255, 240, 0, 1);
}

@media only screen and (max-width: 600px) {
  .nav-logo {
    visibility: collapse;
    display: none;
  }
  .nav {
    justify-content: center;
    padding: 2px 0;
    margin-bottom: 0.5rem;
  }
  .nav-btn {
    font-size: 14px;
    margin-left: 0px;
    padding: 2px 4px;
  }
}