.chat-surface {
  display: grid;
  grid-template-columns: minmax(18rem, 20rem) minmax(42rem, 1fr);
  gap: 0.9rem;
  height: 100%;
  min-height: 0;
}

.left-panel,
.right-panel {
  height: 100%;
  min-height: 0;
  border-radius: var(--radius-panel);
}

.left-panel {
  min-width: 18rem;
}

.right-panel {
  min-width: 42rem;
}

.left-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--surface-sidebar);
  overflow: hidden;
}

.right-panel {
  background: var(--surface-card);
  overflow: hidden;
}

.panel-header,
.panel-footer {
  padding: 0.95rem 1.2rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.05rem 1.2rem 0.95rem;
  min-height: 4.55rem;
  background: rgba(255, 255, 255, 0.02);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.05);
}

.panel-header-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.panel-header-copy {
  display: grid;
  align-content: start;
  gap: 0.18rem;
}

.panel-header-copy {
  min-width: 0;
}

.panel-header .eyebrow {
  margin: 0;
}

.panel-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.panel-header p {
  margin: 0;
}

#conversation-total-label {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.conversation-list {
  padding: 0.7rem 0.7rem 1rem;
  display: grid;
  align-content: start;
  gap: 0.28rem;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.conversation-list::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.conversation-card {
  position: relative;
  width: 100%;
  padding: 0.82rem 0.9rem;
  border-radius: var(--radius-control);
  background: transparent;
  color: inherit;
  text-align: left;
  display: grid;
  gap: 0.22rem;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
  touch-action: none;
  content-visibility: auto;
  contain-intrinsic-size: 4.5rem;
}

.conversation-card,
.conversation-card * {
  user-select: none;
  -webkit-user-select: none;
}

.conversation-card:hover {
  background: rgba(255, 255, 255, 0.038);
}

.conversation-card.is-active {
  background: var(--surface-active);
  box-shadow: var(--shadow-float);
}

.conversation-card.is-dragging {
  opacity: 0.52;
  cursor: grabbing;
  pointer-events: none;
}

.conversation-card.is-drop-target {
  background: rgba(255, 255, 255, 0.06);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 0 0 2px rgba(255, 255, 255, 0.04);
}

.conversation-title-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.conversation-title-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  margin-left: auto;
  min-width: 0;
  flex: 0 0 auto;
}

.conversation-title {
  font-size: 0.94rem;
  font-weight: 700;
  flex: 1 1 auto;
  min-width: 0;
}

.conversation-presence {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: 1.15rem;
  color: var(--text-muted);
  font-size: 0.74rem;
  line-height: 1;
  white-space: nowrap;
}

.conversation-pin-badge {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: 1.15rem;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.conversation-unread-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.15rem;
  height: 1.15rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
}

.conversation-preview-row {
  display: grid;
  gap: 0.14rem;
  min-width: 0;
}

.conversation-preview {
  display: flex;
  align-items: baseline;
  min-width: 0;
  flex: 1 1 auto;
  color: var(--text-secondary);
  font-size: 0.78rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversation-preview-sender {
  flex: 0 0 auto;
  margin-right: 0.3rem;
  color: var(--text-primary);
  font-size: inherit;
  font-weight: 600;
}

.conversation-preview-text {
  color: var(--text-secondary);
  font-size: inherit;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation-timestamp {
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.25;
}

.panel-footer {
  padding-top: 0.4rem;
}

.status-dock {
  display: grid;
  gap: 0.55rem;
  padding: 0.55rem 0.6rem;
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.035);
}

.status-dock-primary {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.6rem;
}

.status-avatar {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: var(--radius-control);
  background: var(--surface-active);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 700;
}

.status-copy {
  display: grid;
  gap: 0.2rem;
}

.status-copy strong {
  font-size: 0.88rem;
  font-weight: 700;
}

.status-copy-line {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.status-copy-line span {
  color: var(--text-secondary);
  font-size: 0.76rem;
  white-space: nowrap;
}

.connection-quality {
  display: inline-flex;
  align-items: flex-end;
  gap: 0.16rem;
  height: 0.88rem;
  flex: 0 0 auto;
}

.connection-quality-bar {
  display: block;
  width: 0.18rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  transition: background-color 120ms ease, opacity 120ms ease;
}

.connection-quality-bar:nth-child(1) {
  height: 0.28rem;
}

.connection-quality-bar:nth-child(2) {
  height: 0.44rem;
}

.connection-quality-bar:nth-child(3) {
  height: 0.62rem;
}

.connection-quality-bar:nth-child(4) {
  height: 0.8rem;
}

.connection-quality[data-level="1"] .connection-quality-bar:nth-child(-n+1),
.connection-quality[data-level="2"] .connection-quality-bar:nth-child(-n+2),
.connection-quality[data-level="3"] .connection-quality-bar:nth-child(-n+3),
.connection-quality[data-level="4"] .connection-quality-bar:nth-child(-n+4) {
  background: rgba(255, 255, 255, 0.82);
}

.connection-quality[data-level="0"] .connection-quality-bar {
  background: rgba(255, 255, 255, 0.12);
}

.connection-quality[data-state="reconnecting"] .connection-quality-bar:nth-child(-n+1),
.connection-quality[data-state="connecting"] .connection-quality-bar:nth-child(-n+1) {
  background: rgba(255, 210, 126, 0.88);
}

.connection-quality[data-state="offline"] .connection-quality-bar:nth-child(-n+1) {
  background: rgba(255, 255, 255, 0.22);
}

.status-divider {
  width: 0.22rem;
  height: 0.22rem;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--text-muted);
}

.status-dock-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.35rem;
}

@media (max-width: 1120px) {
  .chat-surface.is-compact-layout {
    display: block;
  }

  .chat-surface.is-compact-layout .left-panel,
  .chat-surface.is-compact-layout .right-panel {
    height: 100%;
    min-width: 0;
  }

  .chat-surface.is-compact-layout[data-compact-panel="right"] .left-panel {
    display: none;
  }

  .chat-surface.is-compact-layout[data-compact-panel="left"] .right-panel {
    display: none;
  }

  .mobile-panel-button {
    display: inline-grid;
    min-width: 2.55rem;
    padding: 0 0.7rem;
    place-items: center;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
  }

  .panel-header,
  .panel-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .panel-header {
    min-height: 4.3rem;
  }

  .conversation-list {
    padding-left: 0.6rem;
    padding-right: 0.6rem;
  }
}

@media (max-width: 680px) {
  .panel-header,
  .panel-footer {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .panel-header {
    min-height: 4.05rem;
  }

  .conversation-list {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    padding-bottom: 0.85rem;
  }

  .conversation-card {
    padding: 0.7rem 0.72rem;
  }

  .conversation-preview {
    font-size: 0.74rem;
  }

  .status-dock {
    gap: 0.45rem;
    padding: 0.5rem;
  }

  .status-copy-line {
    gap: 0.35rem;
  }

  .status-copy-line span {
    font-size: 0.72rem;
  }

  .connection-quality {
    height: 0.82rem;
  }

  .connection-quality-bar {
    width: 0.16rem;
  }

  .utility-button {
    font-size: 0.64rem;
  }
}