:root {
  --nav-height: 3rem;
}

.nav-container {
  z-index: 2;
  position: fixed;
  width: 100vw;
  background-color: rgba(0, 0, 0, 0.8);
}

nav {
  display: grid;
  max-width: 1200px;
  margin: 0 auto;
  grid-template-areas:
    "start burger"
    "center center"
    "end end"
    "flags flags";
  height: var(--nav-height);
}

nav span {
  padding: 0rem 0.2rem;
  height: 100%;
  text-decoration: none;
  text-align: center;
  color: var(--gray-4);
  font-size: 18pt;
  font-weight: bold;
}
nav span:hover {
  box-shadow: inset 0 0 100px 100px rgba(0, 0, 0, 0.1);
  cursor: pointer;
}

.nav-start {
  grid-area: start;
  justify-self: start;
  display: grid;
}

.nav-start a {
  align-items: center;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.nav-center {
  justify-self: start;
  grid-area: center;
  display: none;
  background-color: rgba(0, 0, 0, 0.7);
}
.nav-end {
  grid-area: end;
  justify-items: center;
  display: none;
  background-color: rgba(0, 0, 0, 0.7);
}
.nav-flags {
  grid-area: flags;
  justify-items: center;
  display: none;
  background-color: rgba(0, 0, 0, 0.7);
}
.nav-start.visible {
  display: grid;
  grid-template-columns: 1fr;
}

.nav-end.visible {
  display: grid;
  grid-template-columns: 1fr;
}

.nav-flags.visible {
  display: grid;
  grid-template-columns: 1fr;
}

/* HAMBURGER */
.nav-burger {
  display: grid;
  align-content: center;
  justify-content: end;
  cursor: pointer;
  margin: 0rem 1rem;
  align-self: start;
  height: var(--nav-height);
}

.nav-burger-bar1,
.nav-burger-bar2,
.nav-burger-bar3 {
  width: 1.5rem;
  height: 2px;
  background-color: var(--gray-4);
  margin: 0.2rem 0;
  transition: 0.4s;
}

.change .nav-burger-bar1 {
  transform: translate(0, 0.5rem) rotate(-45deg);
}

.change .nav-burger-bar2 {
  opacity: 0;
}

.change .nav-burger-bar3 {
  transform: translate(0, -0.5rem) rotate(45deg);
}

/* LOGO */
#navbar-logo {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: center;
  width: 2.5rem;
}

#logo-img {
  width: 2.5rem;
}

@media (min-width: 900px) {
  nav {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "start center end flags";
  }
  nav span {
    line-height: var(--nav-height);
  }
  .nav-start {
    display: grid;
    grid-template-columns: auto;
    background-color: transparent;
  }
  .nav-center {
    display: grid;
    justify-self: center;
    align-content: center;
    grid-template-columns: 1fr;
    background-color: transparent;
  }

  .nav-center a {
    display: grid;
    grid-template-columns: auto auto auto auto;
    align-items: center;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

  .nav-end {
    display: grid;
    grid-auto-flow: column;
    background-color: transparent;
  }
  .nav-end a {
    display: grid;
    align-items: center;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

  .nav-flags {
    display: grid;
    grid-template-columns: auto auto;
    background-color: transparent;
    margin-right: 1rem;
  }
  .nav-flags a {
    display: grid;
    align-items: center;
    padding-left: 0.2rem;
    padding-right: 0.2rem;
  }

  .nav-burger {
    display: none;
  }
}