.devchat-shell {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.devchat-rail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: 24px;
}

.devchat-summary-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.devchat-summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 14px;
  box-shadow: var(--shadow-md);
}

.devchat-summary-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.devchat-summary-value {
  margin-top: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 1rem;
  color: var(--text-primary);
}

.devchat-note {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.devchat-quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.devchat-peer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.devchat-peer-button {
  width: 100%;
  text-align: left;
  background: var(--bg-secondary, var(--bg-elevated));
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 150ms ease, transform 150ms ease, background 150ms ease;
}

.devchat-peer-button:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.devchat-peer-button.is-selected {
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
}

.devchat-peer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.devchat-peer-name {
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  color: var(--text-primary);
  word-break: break-word;
}

.devchat-peer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.devchat-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.devchat-tab {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary, var(--bg-elevated));
  color: var(--text-muted);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.78rem;
  font-family: 'Fira Code', monospace;
}

.devchat-tab.is-active {
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.12);
  color: var(--text-primary);
}

.devchat-panel[hidden] {
  display: none !important;
}

.devchat-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.devchat-room-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.devchat-room-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.devchat-room-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.devchat-participant-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.devchat-thread {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 220px;
  max-height: 430px;
  overflow: auto;
}

.devchat-thread--compact {
  min-height: 160px;
  max-height: 320px;
}

.devchat-message {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary, var(--bg-elevated));
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.devchat-message.is-self {
  border-color: rgba(37, 99, 235, 0.4);
  background: rgba(37, 99, 235, 0.08);
}

.devchat-message-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.devchat-message-body {
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  color: var(--text-primary);
}

.devchat-message-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.devchat-composer {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary, var(--bg-elevated));
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.devchat-input,
.devchat-select,
.devchat-textarea {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-base);
  color: var(--text-primary);
  padding: 10px 12px;
  font-family: 'Fira Sans', sans-serif;
}

.devchat-input.mono,
.devchat-textarea.mono {
  font-family: 'Fira Code', monospace;
}

.devchat-textarea {
  resize: vertical;
  min-height: 120px;
}

.devchat-composer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.devchat-status-text {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.devchat-inspector-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.devchat-metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.devchat-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.devchat-mini-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.devchat-mini-item {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  background: var(--bg-secondary, var(--bg-elevated));
}

.devchat-empty {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.devchat-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
}

@media (max-width: 1200px) {
  .devchat-shell,
  .devchat-split,
  .devchat-inspector-grid {
    grid-template-columns: 1fr;
  }

  .devchat-rail {
    position: static;
  }

  .devchat-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .devchat-summary-strip,
  .devchat-metric-grid {
    grid-template-columns: 1fr;
  }

  .devchat-room-head {
    flex-direction: column;
  }

  .devchat-composer-actions {
    flex-direction: column;
    align-items: stretch;
  }
}