php-gallery/css/nav.css

/*
  -=-=-= NAV =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
*/
nav {
  margin: 0 0 2rem; padding: 0.5rem;

  width: calc(100vh - 2rem)); height: 2.5rem;

  align-items: center;

  background-color: var(--bg); color: var(--fg);

  border: 0.2rem solid var(--green);
  outline: 0.5rem solid var(--bg);

  border-radius: var(--rad);
  box-shadow: var(--shadow);
}

nav h3 {
  margin: 0;
}
nav hr {
  margin: 0.5rem 0.2rem; padding: 0;

  opacity: 0;
}

.nav-name h3, .nav-name {
  display: block;
}
.nav-links {
  width: auto;
  justify-content: space-between;
}
@media (max-width: 800px) {
  .nav-name h3, .nav-name {
    display: none;
  }
  .nav-links {
    width: 100%;
    justify-content: space-around;
  }
}

@media (max-width: 400px) {
  .nav-hide {
    display: none;
  }
  .nav-links a .svg {
    margin: 0;
  }
}