.split-screen {
  display: flex;
  height: calc(100vh - var(--navbar-height) - 3rem);
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-panel);
}

.split-panel {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  min-width: 0;
}

.split-panel-left {
  border-right: none;
}

.split-panel-right {
  border-left: none;
}

.split-divider {
  width: 6px;
  background: var(--color-border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.15s ease;
  position: relative;
}

.split-divider:hover,
.split-divider.dragging {
  background: var(--color-accent);
}

.split-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 32px;
  background: var(--color-text-muted);
  border-radius: 1px;
  opacity: 0.5;
}

.split-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.split-header h3 {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.panel-meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.meta-row {
  display: flex;
  gap: 0.75rem;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  min-width: 80px;
  flex-shrink: 0;
}

.meta-value {
  font-size: 0.875rem;
  color: var(--color-text-primary);
}

.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--color-bg-panel);
  border-bottom: 1px solid var(--color-border);
}

.comparison-header h1 {
  font-size: 1.25rem;
}

.comparison-tabs {
  display: flex;
  gap: 0.25rem;
}

.comparison-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
}

.comparison-tab:hover,
.comparison-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
  text-decoration: none;
}

.notes-section {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.notes-content {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  white-space: pre-wrap;
}

.sheets-panel-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}