hexo-theme-next/source/css/_schemes/Muse/_sidebar.styl

if (hexo-config('sidebar.position') == 'right') {
  .sidebar-active {
    // Note: $sidebar-desktop + $content-desktop-large should be less than desktop-large threshold
    // Otherwise a horizontal scrollbar will appear
    +desktop-large() {
      padding-right: $sidebar-desktop;
    }
  }

  .sidebar {
    right: 0 - $sidebar-desktop;

    .sidebar-active & {
      right: 0;
    }
  }
} else {
  .sidebar-active {
    +desktop-large() {
      padding-left: $sidebar-desktop;
    }
  }

  .sidebar {
    left: 0 - $sidebar-desktop;

    .sidebar-active & {
      left: 0;
    }
  }
}

.sidebar {
  background: $black-deep;
  bottom: 0;
  if (not hexo-config('back2top.sidebar')) {
    box-shadow: inset 0 2px 6px black;
  }
  max-height: 100vh;
  overflow-y: auto;
  position: fixed;
  top: 0;
  transition: all $transition-ease-out;
  width: $sidebar-desktop;
  z-index: $zindex-2;

  a {
    border-bottom-color: $black-light;
    color: $grey-dark;

    &:hover {
      border-bottom-color: $gainsboro;
      color: $gainsboro;
    }
  }
}

.links-of-author {
  &:not(:first-child) {
    margin-top: 15px;
  }

  a {
    border-bottom-color: $black-light;
    display: inline-block;
    margin-bottom: 10px;
    margin-right: 10px;
    vertical-align: middle;

    if (hexo-config('social_icons.transition')) {
      transition: all $transition-ease;
    }

    &::before {
      background: rgb(random-color(0, 255) - 50%, random-color(0, 255) - 50%, random-color(0, 255) - 50%);
      display: inline-block;
      margin-right: 3px;
      transform: translateY(-2px);
      round-icon(4px);
    }
  }
}

.links-of-blogroll-item {
  if (hexo-config('links_settings.layout') == 'inline') {
    display: inline-block;
  }
  padding: 2px 10px;

  a {
    box-sizing: border-box;
    display: inline-block;
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

.popular-posts .popular-posts-item .popular-posts-link:hover {
  background: none;
}

.sidebar-dimmer {
  background: black;
  height: 100%;
  left: 0;
  opacity: 0;
  position: fixed;
  top: 0;
  transition: visibility .4s, opacity .4s;
  visibility: hidden;
  width: 100%;
  z-index: $zindex-1;

  .sidebar-active & {
    opacity: .7;
    visibility: visible;
  }
}

+desktop-large() {
  .sidebar-dimmer {
    display: none;
  }
}