lbry.tech/sass/partials/_navigation.scss

.navigation {
  top: 0; left: 0;

  background-color: $white;
  box-shadow: 0 1px 5px rgba($black, 0.1);
  padding-right: env(safe-area-inset-right);
  padding-left: env(safe-area-inset-left);
  position: fixed;
  width: 100%;
  z-index: 10;

  > div:first-of-type {
    position: relative;

    @media (min-width: 701px) {
      align-items: stretch;
      display: flex;
      flex-flow: row wrap;
    }

    @media (max-width: 700px) {
      overflow: auto;
      overflow-scrolling: touch;
      white-space: nowrap;
      width: 100%;

      &::before {
        width: 2rem; height: 4rem;
        top: 0; right: 0;

        background-image: linear-gradient(90deg, rgba($white, 0), $white 50%, $white); // iOS Safari cannot handle `transparent`
        content: "";
        position: fixed;
        z-index: 2;
      }
    }
  }
}

.navigation__item {
  overflow: hidden;
  padding-right: 0.5rem;
  padding-left: 0.5rem;
  position: relative;

  @media (max-width: 700px) {
    display: inline-block;
    transform: translate3d(0, 0, 0);
    transition: opacity 0.2s 0.2s ease, transform 0.4s 0.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    vertical-align: top;

    &:last-of-type {
      margin-right: 3rem;
    }
  }

  &:first-of-type {
    @include hide-text;
    width: 10rem; height: 3rem;

    background-image: url("../media/svg/logo.svg");
    background-repeat: no-repeat;
    background-size: contain;
    flex: 1;
    top: 0.5rem;
  }

  &:not(:first-of-type) {
    color: inherit;
    font-size: 1rem;
    line-height: 4rem;

    &::after {
      width: 100%; height: 3px;

      background-color: $teal;
      content: "";
      left: 0;
      position: absolute;
      transition: bottom 0.2s;
    }

    &:not(:hover) {
      &::after {
        bottom: -3px;
      }
    }

    &:hover,
    &.active {
      &::after {
        bottom: 0;
      }
    }
  }
}