mastodon/app/assets/stylesheets/stream_entries.scss

.activity-stream {
  clear: both;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);

  .entry {
    background: lighten(#d9e1e8, 8%);

    &, .detailed-status.light {
      border-bottom: 1px solid #d9e1e8;
    }

    &:last-child {
      &, .detailed-status.light {
        border-bottom: 0;
        border-radius: 0 0 4px 4px;
      }
    }

    &:first-child {
      &, .detailed-status.light {
        border-radius: 4px 4px 0 0;
      }

      &:last-child {
        &, .detailed-status.light {
          border-radius: 4px;
        }
      }
    }
  }

  .status.light {
    padding: 14px 14px 14px (48px + 14px*2);
    position: relative;
    min-height: 48px;
    cursor: default;

    .status__header {
      font-size: 15px;

      .status__meta {
        float: right;
        font-size: 14px;

        .status__relative-time {
          color: #9baec8;
        }
      }
    }

    .status__display-name {
      display: block;
      max-width: 100%;
      padding-right: 25px;
      color: #282c37;
    }

    .status__avatar {
      position: absolute;
      left: 14px;
      top: 14px;
      width: 48px;
      height: 48px;

      & > div {
        width: 48px;
        height: 48px;
      }

      img {
        display: block;
        border-radius: 4px;
      }
    }

    .display-name {
      display: block;
      max-width: 100%;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;

      strong {
        font-weight: 500;
        color: #282c37;
      }

      span {
        font-size: 14px;
        color: #9baec8;
      }
    }

    .status__content {
      color: #282c37;

      a {
        color: #2b90d9;
      }
    }

    .status__attachments {
      margin-top: 8px;
      overflow: hidden;
      width: 100%;
      box-sizing: border-box;
      height: 110px;
      display: flex;
    }
  }

  .detailed-status.light {
    padding: 14px;
    background: #fff;
    cursor: default;

    .detailed-status__display-name {
      display: block;
      overflow: hidden;
      margin-bottom: 15px;

      & > div {
        float: left;
        margin-right: 10px;
      }

      .display-name {
        display: block;
        max-width: 100%;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;

        strong {
          font-weight: 500;
          color: #282c37;
        }

        span {
          font-size: 14px;
          color: #9baec8;
        }
      }
    }

    .avatar {
      width: 48px;
      height: 48px;

      img {
        display: block;
        border-radius: 4px;
      }
    }

    .status__content {
      color: #282c37;

      a {
        color: #2b90d9;
      }
    }

    .detailed-status__meta {
      margin-top: 15px;
      color: #9baec8;
      font-size: 14px;
      line-height: 18px;

      a {
        color: inherit;
      }

      span > span {
        font-weight: 500;
        font-size: 12px;
        margin-left: 6px;
        display: inline-block;
      }
    }

    .detailed-status__attachments {
      margin-top: 8px;
      overflow: hidden;
      width: 100%;
      box-sizing: border-box;
      height: 300px;
      display: flex;
    }

    .video-player {
      margin-top: 8px;
      height: 300px;
      overflow: hidden;

      video {
        position: relative;
        z-index: 1;
        width: 100%;
        height: 100%;
        object-fit: cover;
        top: 50%;
        transform: translateY(-50%);
      }
    }
  }

  .media-item, .video-item {
    box-sizing: border-box;
    position: relative;
    left: auto;
    top: auto;
    right: auto;
    bottom: auto;
    float: left;
    border: medium none;
    display: block;
    flex: 1 1 auto;
    height: 100%;
    margin-right: 2px;

    &:last-child {
      margin-right: 0;
    }

    a {
      display: block;
      width: 100%;
      height: 100%;
      background: no-repeat scroll center center / cover;
      text-decoration: none;
      cursor: zoom-in;
    }
  }

  .video-item {
    max-width: 196px;

    a {
      cursor: pointer;
    }

    .video-item__play {
      position: absolute;
      top: 50%;
      left: 50%;
      font-size: 36px;
      transform: translate(-50%, -50%);
      padding: 5px;
      border-radius: 100px;
      color: rgba(255, 255, 255, 0.8);
    }
  }

  .media-spoiler {
    background: #9baec8;
    width: 100%;
    height: 100%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    transition: all 100ms linear;

    &:hover {
      background: darken(#9baec8, 5%);
    }

    span {
      display: block;

      &:first-child {
        font-size: 14px;
      }

      &:last-child {
        font-size: 11px;
        font-weight: 500;
      }
    }
  }

  .pre-header {
    padding: 14px 0px;
    padding-left: (48px + 14px*2);
    padding-bottom: 0;
    margin-bottom: -4px;
    color: #9baec8;
    font-size: 14px;
    position: relative;

    .pre-header__icon {
      position: absolute;
      left: (48px + 14px*2 - 30px);
    }

    .status__display-name.muted strong {
      color: #9baec8;
    }
  }
}

.embed {
  .activity-stream {
    border-radius: 4px;
    box-shadow: none;

    .entry {
      &:last-child {
        border-radius: 0 0 4px 4px;
      }

      &:first-child {
        border-radius: 4px 4px 0 0;

        &:last-child {
          border-radius: 4px;
        }
      }
    }
  }
}