html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: system-ui, sans-serif;
}

/* Reusable pane with a grid filling the remaining space */

.master-pane {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.master-pane > :is(h2, h3, h4) {
  margin: 0;
  padding: 12px 16px;
  border-bottom: 1px solid var(--vaadin-border-color-secondary);
}

.master-pane > h2 {
  font-size: 1.1rem;
}

.master-pane vaadin-grid {
  flex: 1;
  min-height: 0;
  border: none;
  border-radius: 0;
}

/* Pane header with back/close button + heading */

.pane-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--vaadin-border-color-secondary);
  flex-shrink: 0;
}

.pane-header :is(h2, h3, h4) {
  margin: 0;
  flex: 1;
}

.pane-header h2 {
  font-size: 1.1rem;
}

/* Back / close button used in pane headers */

.back-btn {
  cursor: pointer;
  background: none;
  border: 1px solid var(--vaadin-border-color-secondary);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 0.85rem;
}

.detail-pane {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: auto;
}

.detail-subject {
  font-size: 1.2rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-meta {
  padding: 16px;
  color: var(--vaadin-text-color-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  border-bottom: 1px solid var(--vaadin-border-color-secondary);
}

.detail-body {
  flex: 1;
  padding: 16px;
  line-height: 1.6;
  font-size: 0.9rem;
  overflow: auto;
}

.detail-body p {
  margin: 0 0 1em;
}

.detail-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--vaadin-text-color-secondary);
}

/* Grid cell: flex column with primary + secondary text */

.grid-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0;
  cursor: pointer;
}

.grid-cell .primary {
  font-weight: 600;
  font-size: 0.9rem;
}

.grid-cell .secondary {
  font-size: 0.8rem;
  color: var(--vaadin-text-color-secondary);
}

/* Definition list for key-value pairs */

.props-list {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.9rem;
}

.props-list dt {
  font-size: 0.8rem;
  color: var(--vaadin-text-color-secondary);
  margin: 0;
}

.props-list dd {
  margin: 2px 0 0;
}

/* Email-specific cell (wider padding) */

.email-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 0;
  cursor: pointer;
}

.email-from {
  font-weight: 600;
  font-size: 0.9rem;
}

.email-subject {
  font-size: 0.85rem;
}

.email-preview {
  font-size: 0.8rem;
  color: var(--vaadin-text-color-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-date {
  font-size: 0.75rem;
  color: var(--vaadin-text-color-secondary);
}