.pdf-doc-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pdf-doc-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 18px;
}

.pdf-doc-panel,
.pdf-doc-result,
.pdf-doc-note,
.pdf-doc-preview {
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-bg-secondary);
}

.pdf-doc-title {
  margin: 0 0 6px;
  font-size: 18px;
}

.pdf-doc-copy {
  margin: 0 0 14px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.pdf-meta-grid,
.pdf-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.pdf-meta-card,
.pdf-stat-card {
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg);
}

.pdf-meta-value,
.pdf-stat-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
}

.pdf-meta-label,
.pdf-stat-label {
  margin-top: 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.pdf-range-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.pdf-range-wrap label,
.pdf-output-wrap label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.pdf-range-input,
.pdf-output-text {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg);
  color: var(--color-text);
  font: inherit;
}

.pdf-output-text {
  min-height: 280px;
  resize: vertical;
  line-height: 1.55;
}

.pdf-range-hint {
  font-size: 12px;
  color: var(--color-text-muted);
}

.pdf-page-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pdf-page-chip {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 700;
}

.pdf-page-chip-remove {
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.pdf-doc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.pdf-doc-note {
  font-size: 13px;
  color: var(--color-text-secondary);
}

@media (max-width: 900px) {
  .pdf-doc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .pdf-doc-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .pdf-doc-panel,
  .pdf-doc-result,
  .pdf-doc-note,
  .pdf-doc-preview {
    padding: 14px;
  }

  .pdf-doc-title {
    font-size: 16px;
  }

  .pdf-meta-value,
  .pdf-stat-value {
    font-size: 16px;
  }

  .pdf-output-text {
    min-height: 200px;
  }
}