webapp/src/styles/Inbox.scss

main {
  display: flex;
  height: 100vh;
  flex-direction: column;
  position: relative;
}

.messages {
  top: 74px;
  height: calc(100% - 74px);
  left: 0;
  right: 0;
  padding-left: 42px;
  padding-right: 26px;
  background: #fff;
  display: flex;
  flex: 1;
  flex-direction: column;
  position: fixed;
  z-index: 9;

  .row {
    flex: 1;
  }

  .author__name {
    font-weight: 500;
  }

  .author {
    position: relative;
  }
}

// список диалогов и юзеров
.chat-list {
  display: flex;
  flex-direction: column;
  padding: 10px;
  height: calc(100% - 10px);

  $fade-height: 10px;

  .holder {
    overflow: hidden;
    flex: 1;
    position: relative;
    padding: $fade-height 0;

    &::before,
    &::after {
      content: '';
      position: absolute;
      width: 100%;
      right: 10px;
      z-index: 1;
      height: $fade-height;
    }

    &::before {
      top: 0;
      background: linear-gradient(white, transparent $fade-height);
    }

    &::after {
      bottom: 0;
      background: linear-gradient(transparent, white $fade-height);
    }

    .dialogs {
      scroll-behavior: smooth;
      display: flex;
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
      height: 100%;
      overflow: auto;
      flex-direction: column;
      box-sizing: border-box;
    }
  }
}

.chat-list__search,
.interlocutor {
  border-bottom: 3px solid #141414;
  padding: 1em 0;
}

// табы выбора списка
.chat-list__types {
  @include font-size(1.7rem);

  margin: 16px 0;

  ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  li {
    margin-right: 1em;
  }

  strong {
    border-bottom: 3px solid;
    font-weight: normal;
  }
}

.interlocutor {
  height: 56px;
  box-sizing: content-box;

  .circlewrap {
    height: 56px;
    max-width: 56px;
    width: 56px;
  }

  .author {
    margin-bottom: 0;

    &::before {
      left: 40px !important;
      height: 8px !important;
      width: 8px !important;
    }
  }

  .author__name {
    @include font-size(1.7rem);

    margin: 0.4em 0 0;
  }

  .author__details,
  .user-status {
    margin-left: 6.8rem;
  }

  .user-status {
    @include font-size(1.2rem);

    color: #ccc;
  }
}

.conversation {
  display: flex;
  flex-direction: column;
}

.conversation__messages {
  flex: 1;
  overflow: auto;
  position: relative;
}

.message-form {
  background: #fff;
  padding: 2px 0 12px 0;

  .wrapper {
    border: 2px solid #cccccc;
    border-radius: 16px;
    padding: 4px;
    display: flex;
    flex-direction: row;
    align-items: center;

    .grow-wrap {
      display: grid;
      width: 100%;

      &::after {
        content: attr(data-replicated-value) ' ';
        white-space: pre-wrap;
        visibility: hidden;
        transition: height 1.3s ease-in-out;
      }

      & textarea {
        margin-bottom: 0;
        font-family: inherit;
        border: none;
        resize: none;
        overflow: hidden;

        &:focus,
        &:focus-visible,
        &:active {
          border: none;
          outline: none;
          box-shadow: none;
        }
      }

      &::after,
      & textarea {
        /* Identical styling required!! */
        font-weight: 400;
        font-size: 14px;
        line-height: 20px;
        padding: 8px;
        grid-area: 1 / 1 / 2 / 2;
        width: 100%;
      }
    }

    button {
      border: none;
      cursor: pointer;
      text-align: center;
      width: 20px;
      height: 20px;
      margin: auto 8px 8px 0;

      &:hover {
        .icon {
          opacity: 0.5;
        }
      }

      .icon {
        width: 100%;
        height: 100%;
        opacity: 0.2;
        transition: opacity 0.3s;
      }
    }
  }
}

.conversation__messages-container {
  left: 0;
  height: 100%;
  overflow: auto;
  position: absolute;
  top: 0;
  width: 100%;
  scroll-behavior: smooth;
}

.conversation__date {
  position: relative;
  text-align: center;

  &::before {
    background: #141414;
    content: '';
    height: 1px;
    left: 0;
    position: absolute;
    top: 0.8em;
    width: 100%;
    z-index: -1;
  }

  time {
    background: #fff;
    @include font-size(1.5rem);

    color: #9fa1a7;
    padding: 0 0.5em;
  }
}