.post-collapse {
  position: relative;
  z-index: 1010;

  &::after {
    content: " ";
    position: absolute;
    top: 20px;
    left: 0;
    margin-left: -2px;
    width: 4px;
    height: 100%;
    background: var(--border-color);
    z-index: -1;
  }

  margin-left: 55px;

  .collection-title {
    position: relative;
    margin: 0;

    h1, h2 { margin-left: 20px; }

    small { color: var(--description-color); margin-left: 5px; }

    &::before {
      content: " ";
      position: absolute;
      left: 0;
      top: 50%;
      margin-left: -4px;
      margin-top: -4px;
      width: 8px;
      height: 8px;
      background: var(--description-color);
      circle();
    }
  }

  .post-collapse-header {
    position: relative;
    the-transition();
    transition-property: border;

    &::before {
      content: " ";
      position: absolute;
      left: 0;
      top: 50%;
      width: 6px;
      height: 6px;
      margin-top: -3px;
      margin-left: -3px;
      background: var(--description-color);
      circle();
      the-transition();
      transition-property: background;
    }
  }

  .post-collapse-header:hover {
    &::before { background: var(--link-color-hover); }
  }

  .post-collapse-time {
    color: var(--link-color-hover);
    position: absolute;
    font-size: 0.9rem;
    left: 20px;
  }

  .post-collapse-title {
    margin-left: 4.5rem;
    font-size: 0.9rem;
    font-weight: normal;
    line-height: inherit;

    &::after {
      margin-left: 3px;
      opacity: 0.6;
    }

    a {
      color: var(--link-color);
      &:hover {
        color: var(--link-color-hover);
      }
    }
  }
}

+mobile() {
  .post-collapse {
    margin: 0 20px;
  }
}