.md {
  @import (multiple) '../../less/colors-md.less';
  @import (multiple) '../../less/vars-md.less';
  .messages-content,
  .messages {
    background: #eee;
  }
  .message {
    margin-top: 16px;
    &:last-child {
      margin-bottom: 16px;
    }
  }
  .messages-title {
    font-size: 12px;
    color: rgba(0,0,0,.51);;
    margin-top: 16px;
    &:last-child {
      margin-bottom: 16px;
    }
    b {
      font-weight: 500;
    }
  }
  .message-avatar {
    width: 32px;
    height: 32px;
  }
  .message-header, .message-footer, .message-name {
    color: rgba(0,0,0,.51);
    b {
      font-weight: 500;
    }
  }
  .message-header, .message-name {
    margin-bottom: 2px;
  }
  .message-footer {
    margin-top: 2px;
  }
  .message-bubble {
    font-size: 16px;
    border-radius: 2px;
    padding: 6px 8px;
    min-height: 32px;
  }
  .message-image {

  }
  .message-text-header, .message-text-footer {
    color: rgba(0,0,0,.51);
  }
  .message-text-header {
    margin-bottom: 4px;
  }
  .message-text-footer {
    margin-top: 4px;
  }
  .message-received {
    margin-left: 8px;
    .message-bubble {
      color: @messageReceivedColor;
      background: @messageReceivedBg;
    }
    .message-avatar + .message-content {
      margin-left: 8px;
    }
    &.message-tail .message-bubble {
      border-radius: 2px 2px 2px 0;
      &:before {
        position: absolute;
        content: '';
        border-left: 8px solid transparent;
        border-right: 0 solid transparent;
        border-bottom: 8px solid #fff;
        right: 100%;
        bottom: 0;
        width: 0;
        height: 0;
      }
    }
  }
  .message-sent {
    margin-right: 8px;
    .message-bubble {
      color: @messageSentColor;
      background: @messageSentBg;
    }
    .message-avatar + .message-content {
      margin-right: 8px;
    }
    &.message-tail .message-bubble {
      border-radius: 2px 2px 0 2px;
      &:before {
        position: absolute;
        content: '';
        border-right: 8px solid transparent;
        border-left: 0 solid transparent;
        border-bottom: 8px solid #c8e6c9;
        left: 100%;
        bottom: 0;
        width: 0;
        height: 0;
      }
    }
  }

  // Rules
  .message + .message:not(.message-first) {
    margin-top: 8px;
  }

  // Typing
  .message-typing-indicator {
    > div {
      width: 6px;
      height: 6px;
      opacity: 0.6;
      + div {
        .ltr({
          margin-left: 6px;
        });
        .rtl({
          margin-right: 6px;
        });
      }
    }
    > div:nth-child(1) {
      animation: md-message-typing-indicator 900ms infinite;
    }
    > div:nth-child(2) {
      animation: md-message-typing-indicator 900ms 150ms infinite;
    }
    > div:nth-child(3) {
      animation: md-message-typing-indicator 900ms 300ms infinite;
    }
  }

  // Dark Theme
  & when (@includeDarkTheme) {
    .theme-dark {
      .messages-content, .messages-content&,
      .messages, .messages& {
        background-color: transparent;
      }
      .messages-title {
        color: rgba(255,255,255,0.54);
      }
      .message-header, .message-footer, .message-name {
        color: rgba(255,255,255,0.54);
      }
    }
  }
}

@keyframes md-message-typing-indicator {
  0% {
    transform: translateY(0%);
  }
  25% {
    transform: translateY(-5px);
  }
  50% {
    transform: translateY(0%);
  }
}