lbry-desktop/src/renderer/scss/component/_navigation.scss

.navigation {
  background-color: $lbry-white;
  border-right: 1px solid rgba($lbry-gray-1, 0.9);
  font-size: 1.25rem;
  padding-top: var(--spacing-vertical-large);
  padding-right: var(--spacing-vertical-small);
  position: relative;

  html[data-theme='dark'] & {
    background-color: $lbry-black;
    border-right: 1px solid $lbry-black;
  }

  // The navigation does not need to be visible
  // on smaller screen widths

  @media (min-width: 601px) {
    min-width: 171px; // 1px is for the border
  }

  @media (max-width: 600px) {
    display: none;
  }

  &::before {
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;

    // TODO: Make this gradient "to bottom" on mobile view
    background-image: linear-gradient(
      to right,
      transparent,
      rgba(mix($lbry-blue-3, $lbry-gray-4, 15%), 0.2) 100%
    );
    content: '';
    position: absolute;
    z-index: 0;

    html[data-theme='dark'] & {
      background-image: linear-gradient(
        to bottom right,
        transparent,
        rgba(mix($lbry-blue-3, $lbry-gray-4, 15%), 0.2) 100%
      );
    }
  }
}

.navigation__links {
  position: relative;
}

.navigation__link {
  display: block;
  line-height: 1.75;
  padding-left: var(--spacing-vertical-large);
  position: relative;
  text-align: left;
  transition: color 0.2s;
  white-space: nowrap;
  width: 100%;

  &::before {
    top: 0;
    left: 0;

    background-color: $lbry-teal-3;
    content: '';
    height: 100%;
    position: absolute;
    transition: width 0.2s;
  }

  &:not(.navigation__link--active):not(.navigation__link--title) {
    color: $lbry-gray-5;

    &::before {
      width: 0;
    }
  }

  &:not(.navigation__link--title):hover,
  &.navigation__link--active {
    color: $lbry-black;

    html[data-theme='dark'] & {
      color: $lbry-gray-1;
    }

    &::before {
      width: 0.5rem;
    }
  }
}

.navigation__link--title {
  margin-bottom: var(--spacing-vertical-small);
  padding-top: var(--spacing-vertical-medium);

  color: $lbry-gray-5;
  cursor: default;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.1rem;
  text-transform: uppercase;
}

.navigation__link-items {
  font-size: 1.15rem;
  padding-left: var(--spacing-vertical-large);
}

.navigation__link-item {
  position: relative;

  &::before {
    width: 0.25rem;
    height: 0.25rem;
    top: 44%;
    left: -1rem;

    border-radius: 50%;
    content: '';
    position: absolute;
    transition: background-color 0.2s;
  }

  &:not(.navigation__link-item--active) {
    color: $lbry-gray-5;

    &::before {
      background-color: transparent;
    }
  }

  &:hover,
  .navigation__link-item--active {
    &::before {
      background-color: $lbry-black;

      html[data-theme='dark'] & {
        color: $lbry-gray-1;
      }
    }
  }
}