peer-calls/src/scss/_chat.scss

.chat-container {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  -ms-transform: translateX(100%);
  -webkit-transform: translateX(100%);
  transform: translateX(100%);
  -webkit-transition: -webkit-transform 0.5s cubic-bezier(0.55, 0, 0, 1), box-shadow 0.5s cubic-bezier(0.55, 0, 0, 1);
  transition: transform 0.5s cubic-bezier(0.55, 0, 0, 1), box-shadow 0.5s cubic-bezier(0.55, 0, 0, 1);
  width: 320px;
  margin: 0 auto;
  z-index: 4;

  &.show {
    -ms-transform: none;
    -webkit-transform: none;
    transform: none;
    box-shadow: 0 5px 5px 5px rgba(0, 0, 0, 0.19), 0 1px 6px rgba(0, 0, 0, 0.12);
  }

  @media (max-width: 375.98px) {
    &.show {
      width: 100% !important;
    }
  }
}

.chat-header {
  background: #42a7a1;
  color: #fff;
  height: 52px;
  line-height: 52px;

  .chat-close {
    font-size: 24px;
    height: 100%;
    line-height: 24px;
    padding: 12px;
    text-align: center;
    float: left;
    width: 64px;
    cursor: pointer;

    .chat-button {
      float: right;
      a {
        font-size: 24px;
        color: #fff;
      }
    }
  }

  .chat-title {
    font-size: 18px;
    font-weight: 500;
    color: #fff;
    text-overflow: ellipsis;
    text-transform: uppercase;
  }
}

.chat-history {
  bottom: 0;
  left: 0;
  overflow-y: auto;
  position: absolute;
  right: 0;
  top: 52px;
  bottom: 130px;
  padding: 20px 20px 0;
  background-color: #fff;

  .chat-empty {
    color: #f6f6f6;
    left: 0;
    position: absolute;
    right: 0;
    text-align: center;
    top: 50%;
    -ms-transform: translateY(-50%);
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);

    .chat-empty-icon {
      font-size: 88px;
    }

    .chat-empty-message {
      font-size: 15px;
      font-weight: bold;
    }
  }

  .chat-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;

    .chat-item-img {
      width: 36px;
      height: 36px;
      border-radius: 50%;

      &.icon {
        font-size: 36px;
        color: #777;
      }
    }

    .message {
      position: relative;
      padding: 10px;
      border-radius: 5px;
      background: #f6f6f6;
      width: calc(100% - 40px);

      div {
        font-size: 13px;
        color: #777;
        word-wrap: break-word;
      }

      .message-user-name {
        font-size: 12px;
        font-weight: bold;
        color: #000;
      }

      .icon:before {
        color: #999;
        font-size: 11px;
        margin: 0 2px;
      }

      .message-time {
        font-size: 11px;
        color: #999;
      }

      .message-text {
        font-size: 13px;
        color: #777;
        overflow: hidden;
        white-space: pre-wrap;
        word-wrap: break-word;
        margin: 5px 0;
      }
    }

    &.chat-item-me {
      .message {
        margin-right: 15px;

        &::after {
          left: 100%;
          border: solid transparent;
          border-left-color: #f6f6f6;
          content: "";
          height: 0;
          width: 0;
          position: absolute;
          pointer-events: none;
          border-width: 10px;
          top: 10px;
        }
      }
    }

    &.chat-item-other {
      .message {
        margin-left: 15px;

        &::before {
          right: 100%;
          border: solid transparent;
          border-right-color: #f6f6f6;
          content: "";
          height: 0;
          width: 0;
          position: absolute;
          pointer-events: none;
          border-width: 10px;
          top: 10px;
        }
      }
    }
  }
}

.chat-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  margin-top: 10px;
  background-color: #fff;
  border-top: 1px solid #f6f6f6;
  padding: 20px;

  .chat-controls-textarea {
    width: 100%;
    border: none;
    border-radius: 5px;
    resize: none;
    outline: none;
    max-height: 80px;
    height: 50px;
    overflow: auto;
    color: #777;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .chat-controls-buttons {
    margin-top: 15px;
    display: flex;
    justify-content: space-between;

    .chat-controls-buttons-send {
      padding: 0 15px;
      background: #407cf7;
      line-height: 25px;
      display: inline-block;
      color: #fff;
      text-decoration: none;
      border-radius: 3px;
      border: 0;
      cursor: pointer;

      &:focus {
        outline: none;
      }
    }

    .chat-controls-buttons-wrapper {
      display: flex;
    }
  }
}

.emoji {
  display: flex;

  .chat-controls-buttons-smiles {
    cursor: pointer;
    display: flex;
    align-items: center;
    position: relative;

    .icon {
      color: #777;
      z-index: 1;
    }

    .chat-controls-buttons-smiles-menu {
      background-color: #fff;
      display: none;
      position: absolute;
      width: 140px;
      height: 50px;
      line-height: 50px;

      .chat-controls-buttons-smile {
        margin-left: 5px;
      }
    }

    &:hover {
      .chat-controls-buttons-smiles-menu {
        display: flex;
        right: 10px;
      }
    }
  }
}