body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f7fb;
  color: #222;
}

.container {
  max-width: 1180px;
  margin: 24px auto;
  padding: 16px 20px 32px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

h1 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1.6rem;
}

label {
  font-weight: 500;
}

.panel {
  margin: 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.image-nav {
  justify-content: space-between;
  gap: 8px;
}

.image-nav button {
  padding: 4px 10px;
  border-radius: 999px;
}

.image-nav-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-switch select {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid #cbd5f0;
  background: #f9fbff;
  font-size: 0.9rem;
}

.main-layout {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.objects-pane {
  flex: 0 0 260px;
}

.left-pane {
  flex: 1 1 auto;
}

.right-pane {
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sentences-pane {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mode-option {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 400;
}

select {
  min-width: 220px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #cbd5f0;
  background: #f9fbff;
}

.canvas-wrapper {
  border-radius: 12px;
  border: 1px solid #d4ddf5;
  background: #f1f5ff;
  overflow: visible;
  padding: 8px;
}

canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  padding: 8px 14px;
  border-radius: 999px;
  border: none;
  background: #2563eb;
  color: white;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.4);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}

button:disabled {
  background: #9ca3af;
  cursor: not-allowed;
  box-shadow: none;
}

button:not(:disabled):hover {
  background: #1d4ed8;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
}

.status {
  font-size: 0.9rem;
}

.status.ok {
  color: #16a34a;
}

.status.error {
  color: #dc2626;
}

.sidebar-section {
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  padding: 10px 12px;
  background: #f9fafb;
}

.sidebar-section h2 {
  font-size: 1rem;
  margin: 0 0 6px;
}

.sidebar-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
}

.sidebar-row input[type="text"] {
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 0.9rem;
}

.detail-value {
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
  font-size: 0.9rem;
  min-height: 24px;
}

.objects-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 260px;
  overflow-y: auto;
  padding-right: 4px;
}

.objects-tags {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.object-tag {
  padding: 2px 6px;
  border-radius: 999px;
  background: #e5e7eb;
  font-size: 0.75rem;
  white-space: nowrap;
}

.object-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 4px 6px;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
  background: #ffffff;
}

.object-item-header {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

.object-hierarchy-select {
  width: 40px;
  min-width: 0;
  padding: 2px 3px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 0.8rem;
  background: #f9fafb;
}

.object-parent-select {
  width: 50px;
  min-width: 0;
  padding: 2px 3px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 0.8rem;
  background: #eef2ff;
}

.object-item img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
}

.object-item-text {
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
}

.object-item-details {
  padding-left: 24px;
  display: none;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.object-item-details.visible {
  display: flex;
}

.object-item-details input[type="text"] {
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 0.8rem;
}

.object-item-details label {
  font-size: 0.75rem;
}

.sentences-pane {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sentences-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 70vh;
  overflow-y: auto;
  padding: 4px;
}

.sentence-item {
  padding: 12px;
  background: #f9fbff;
  border: 1px solid #d4ddf5;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sentence-item-question {
  font-weight: 600;
  color: #1e40af;
  font-size: 0.95rem;
}

.sentence-item-answer {
  color: #475569;
  font-size: 0.9rem;
  padding-left: 12px;
  border-left: 2px solid #cbd5f0;
}

.sentence-item-empty {
  padding: 24px;
  text-align: center;
  color: #94a3b8;
  font-style: italic;
}

.object-item-text strong {
  font-size: 0.85rem;
}

.selections-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
  padding: 8px;
  background: #f9fbff;
  border: 1px solid #d4ddf5;
  border-radius: 8px;
  margin-bottom: 8px;
}

.selection-item {
  padding: 8px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #475569;
}

.selection-item strong {
  color: #1e40af;
  font-weight: 600;
}

.selections-empty {
  padding: 16px;
  text-align: center;
  color: #94a3b8;
  font-style: italic;
  font-size: 0.85rem;
}