.discussion-message-modal {
    --discussion-action: #ff78ad;
    --discussion-action-mid: #f06092;
    --discussion-action-deep: #e04882;
    --discussion-action-bg: linear-gradient(135deg, var(--discussion-action) 0%, var(--discussion-action-mid) 50%, var(--discussion-action-deep) 100%);
    --discussion-action-shadow: rgba(180, 80, 106, 0.22);
    --discussion-action-hover-shadow: rgba(180, 80, 106, 0.28);
    position: fixed;
    inset: 0;
    z-index: 120;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
  }

  .discussion-message-modal.is-open {
    display: flex;
  }

  .discussion-message-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(53, 31, 45, 0.28);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  .discussion-message-modal-panel {
    position: relative;
    z-index: 1;
    width: min(94vw, 58rem);
    max-height: min(82vh, 42rem);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 0.75rem;
    border: 1.5px solid rgba(212, 120, 142, 0.28);
    border-radius: 1rem;
    background: rgba(255, 250, 253, 0.96);
    box-shadow: 0 24px 72px rgba(118, 54, 76, 0.24);
    padding: 1rem;
  }

  .discussion-edit-modal .discussion-message-modal-panel {
    width: min(94vw, 60rem);
    max-height: min(90vh, 52rem);
  }

  .discussion-edit-modal {
    --discussion-action: #ff78ad;
    --discussion-action-mid: #f06092;
    --discussion-action-deep: #e04882;
    --discussion-action-bg: linear-gradient(135deg, var(--discussion-action) 0%, var(--discussion-action-mid) 50%, var(--discussion-action-deep) 100%);
    --discussion-action-shadow: rgba(180, 80, 106, 0.22);
    --discussion-action-hover-shadow: rgba(180, 80, 106, 0.28);
  }

  .discussion-edit-modal .discussion-btn.primary {
    box-shadow: 0 8px 22px rgba(210, 80, 120, 0.35) !important;
  }

  .discussion-edit-form {
    display: grid;
    gap: 0.85rem;
    min-height: 0;
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  .discussion-edit-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    min-height: 0;
    overflow: hidden;
  }

  .discussion-edit-split > .discussion-editor {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    min-height: 0;
    overflow: hidden;
  }

  .discussion-edit-split > .discussion-editor > .discussion-textarea {
    min-height: 0;
    resize: none;
  }

  .discussion-edit-preview-pane {
    overflow-y: auto;
    min-height: 0;
  }

  .discussion-edit-title-field.is-hidden {
    display: none;
  }

  .discussion-message-modal-head,
  .discussion-message-modal-tabs {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
  }

  .discussion-message-window {
    display: grid;
    grid-template-columns: minmax(18.5rem, 20rem) minmax(0, 1fr);
    height: min(72vh, 38rem);
    min-height: 24rem;
    overflow: hidden;
    border: 1px solid rgba(111, 85, 242, 0.18);
    border-radius: 0.9rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(245, 240, 255, 0.68));
  }

  .discussion-message-sidebar {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 0.65rem;
    border-right: 1px solid rgba(111, 85, 242, 0.16);
    background: rgba(255, 255, 255, 0.48);
    padding: 0.75rem;
    overflow: hidden;
  }

  .discussion-message-room-list,
  .discussion-message-thread {
    display: grid;
    align-content: start;
    gap: 0.55rem;
    overflow: auto;
    min-height: 0;
  }

  .discussion-message-room {
    display: grid;
    grid-template-columns: 2.8rem minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
    border: 1px solid rgba(111, 85, 242, 0.18);
    border-radius: 0.72rem;
    background: rgba(255, 255, 255, 0.58);
    color: #4c3751;
    min-height: 4.35rem;
    padding: 0.68rem 0.72rem;
    text-align: left;
    cursor: pointer;
  }

  .discussion-message-room.is-active,
  .discussion-message-room:hover {
    border-color: rgba(111, 85, 242, 0.46);
    background: rgba(111, 85, 242, 0.11);
  }

  .discussion-message-room-copy {
    display: grid;
    gap: 0.18rem;
    min-width: 0;
  }

  .discussion-message-room-title,
  .discussion-message-room-preview {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .discussion-message-room-preview {
    color: #8b6f86;
    font-size: 0.74rem;
  }

  .discussion-message-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 0;
    height: 100%;
    min-width: 0;
    overflow: hidden;
    padding: 0.9rem 0.9rem 1rem;
  }

  .discussion-message-thread-head,
  .discussion-message-system-card {
    flex: 0 0 auto;
  }

  .discussion-message-thread-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(111, 85, 242, 0.14);
    padding-bottom: 0.65rem;
  }

  .discussion-message-system-card {
    display: none;
  }

  .discussion-message-system-card.is-visible {
    display: grid;
    grid-template-columns: 2.8rem minmax(0, 1fr);
    gap: 0.65rem;
    align-items: center;
    border: 1px solid rgba(111, 85, 242, 0.18);
    border-radius: 0.78rem;
    background: linear-gradient(135deg, rgba(111, 85, 242, 0.12), rgba(255, 255, 255, 0.64));
    padding: 0.7rem;
  }

  .discussion-message-bubble {
    max-width: min(34rem, 86%);
    border: 1px solid rgba(111, 85, 242, 0.18);
    border-radius: 0.9rem;
    background: rgba(255, 255, 255, 0.74);
    color: #493648;
    padding: 0.72rem 0.82rem;
  }

  .discussion-message-thread {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    display: grid;
    align-content: start;
    gap: 0.55rem;
    padding-right: 0.35rem;
    padding-bottom: 0.35rem;
  }

  .discussion-message-bubble.is-mine {
    justify-self: end;
    border-color: rgba(111, 85, 242, 0.34);
    background: linear-gradient(135deg, rgba(111, 85, 242, 0.15), rgba(255, 255, 255, 0.78));
  }

  .discussion-message-composer {
    flex: 0 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.65rem;
    border-top: 1px solid rgba(111, 85, 242, 0.14);
    background: rgba(255, 250, 255, 0.94);
    padding-top: 0.5rem;
    padding-bottom: 0.55rem;
  }

  .discussion-message-composer[hidden] {
    display: none !important;
  }

  .discussion-message-composer .discussion-textarea {
    height: 3.15rem;
    min-height: 3.15rem;
    max-height: 3.15rem;
    padding: 0.85rem 0.9rem;
    line-height: 1.35;
    resize: none;
  }

  .discussion-message-composer .discussion-actions {
    display: grid;
    align-items: stretch;
    min-width: 5.5rem;
  }

  .discussion-message-composer .discussion-actions .discussion-btn {
    height: 2.65rem;
    min-height: 2.65rem;
    padding: 0 1.05rem;
    border-radius: 0.7rem;
    align-self: center;
    width: 100%;
    justify-content: center;
  }

  #discussion-modal-message-status {
    display: block;
    min-height: 1rem;
    max-width: 5.5rem;
    font-size: 0.75rem;
    line-height: 1.2;
    text-align: center;
  }

  #discussion-modal-message-status:empty {
    display: none;
  }

  .discussion-message-modal-list {
    overflow: hidden;
    min-height: 0;
  }