.doc-tool-shell {
  background: #ffffff;
  border-radius: 20px;
  border: 1px solid rgba(32, 64, 128, 0.06);
  box-shadow: 0 22px 44px rgba(15, 40, 90, 0.08);
  padding: 36px 32px;
  margin-bottom: 36px;
}

.doc-tool-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.doc-tool-header h1 {
  margin: 0;
  color: #16375f;
  font-weight: 600;
  font-size: 1.85rem;
}

.doc-tool-subtitle {
  margin: 0;
  color: #5b6f85;
  font-size: 1rem;
  line-height: 1.5;
}

.doc-tool-body {
  display: grid;
  gap: 28px;
}

.doc-tool-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.doc-tool-step {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(13, 110, 253, 0.05);
  border-radius: 999px;
  padding: 10px 18px;
  color: #335075;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
}

.doc-tool-step__index {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 110, 253, 0.18);
  color: #0d3b70;
  font-weight: 600;
}

.doc-tool-step.is-active {
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.18), rgba(102, 16, 242, 0.18));
  color: #0d3b70;
}

.doc-tool-step.is-complete {
  background: rgba(25, 135, 84, 0.12);
  color: #155724;
}

.doc-tool-step.is-complete .doc-tool-step__index {
  background: rgba(25, 135, 84, 0.24);
  color: #0f5132;
}

.doc-tool-form {
  display: grid;
  gap: 24px;
}

.doc-tool-uploader {
  display: grid;
  gap: 16px;
}

.doc-tool-dropzone {
  position: relative;
  border: 2px dashed rgba(13, 110, 253, 0.35);
  border-radius: 18px;
  padding: 28px 20px;
  background: rgba(13, 110, 253, 0.06);
  display: grid;
  justify-items: center;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.doc-tool-dropzone[data-dragover="true"],
.doc-tool-dropzone:hover {
  border-color: rgba(13, 110, 253, 0.85);
  background: rgba(13, 110, 253, 0.12);
  transform: translateY(-1px);
}

.doc-tool-dropzone:focus-within {
  outline: none;
  border-color: rgba(13, 110, 253, 0.85);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.16);
}

.doc-tool-dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.doc-tool-dropzone strong {
  font-size: 1.05rem;
  color: #0d3b70;
}

.doc-tool-dropzone span {
  color: #5b6f85;
  font-size: 0.95rem;
}

.doc-tool-thumbnails {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.doc-tool-thumb {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(20, 60, 120, 0.08);
  background: #f7f9fc;
  cursor: grab;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.doc-tool-thumb:active {
  cursor: grabbing;
}

.doc-tool-thumb.is-dragging {
  opacity: 0.6;
  border-color: rgba(102, 16, 242, 0.4);
  box-shadow: 0 10px 24px rgba(102, 16, 242, 0.18);
}

.doc-tool-thumb__preview {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.22), rgba(102, 16, 242, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0d3b70;
  font-weight: 600;
  font-size: 1rem;
}

.doc-tool-thumb__meta {
  display: grid;
  gap: 4px;
  color: #20324a;
}

.doc-tool-thumb__meta strong {
  font-weight: 600;
  font-size: 0.98rem;
}

.doc-tool-thumb__meta span {
  font-size: 0.85rem;
  color: #5a6f87;
}

.doc-tool-thumb__remove {
  border: none;
  background: transparent;
  color: #6c757d;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: color 0.2s ease;
}

.doc-tool-thumb__remove:hover,
.doc-tool-thumb__remove:focus {
  color: #dc3545;
}

.doc-tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.doc-tool-actions .btn-primary {
  border-radius: 999px;
  padding-inline: 28px;
  font-weight: 600;
}

.doc-tool-actions .btn-link {
  color: #0d6efd;
  font-weight: 500;
}

.doc-tool-error {
  border-radius: 12px;
  border: 1px solid rgba(220, 53, 69, 0.2);
  background: rgba(220, 53, 69, 0.08);
  color: #842029;
  padding: 14px 16px;
  font-weight: 500;
}

.doc-tool-hint {
  font-size: 0.92rem;
  color: #5b6f85;
}

.doc-tool-result {
  border-top: 1px solid rgba(20, 60, 120, 0.08);
  padding-top: 24px;
  display: grid;
  gap: 24px;
}

.doc-tool-result__summary {
  display: grid;
  gap: 12px;
}

.doc-tool-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0d6efd, #6610f2);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.doc-tool-download:hover,
.doc-tool-download:focus {
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(13, 110, 253, 0.3);
}

.doc-tool-preview {
  border-radius: 16px;
  border: 1px solid rgba(20, 60, 120, 0.08);
  padding: 18px;
  background: #fbfcff;
  max-height: 420px;
  overflow: auto;
}

.doc-tool-preview h3 {
  margin-top: 0;
  font-size: 1.05rem;
  color: #1f3757;
}

.doc-tool-preview-pane {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  line-height: 1.6;
  color: #1f2f3f;
}

.doc-tool-preview-pane pre {
  background: #0f1b2e;
  color: #d1f1ff;
  border-radius: 12px;
  padding: 16px;
  overflow: auto;
  font-size: 0.95rem;
}

.doc-tool-thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
}

.doc-tool-thumbnail-grid .doc-tool-page {
  border-radius: 14px;
  border: 1px solid rgba(13, 110, 253, 0.16);
  background: linear-gradient(160deg, rgba(13, 110, 253, 0.15), rgba(102, 16, 242, 0.08));
  color: #0d3b70;
  padding: 18px 12px;
  text-align: center;
  font-weight: 600;
}

.doc-tool-dataset-preview {
  border-radius: 14px;
  border: 1px solid rgba(20, 60, 120, 0.08);
  overflow: hidden;
}

.doc-tool-dataset-preview table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
}

.doc-tool-dataset-preview th,
.doc-tool-dataset-preview td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(20, 60, 120, 0.08);
  font-size: 0.9rem;
  text-align: left;
}

.doc-tool-dataset-preview th {
  background: rgba(13, 110, 253, 0.08);
  font-weight: 600;
  color: #0d3b70;
}

.doc-tool-secondary-panel {
  background: rgba(13, 110, 253, 0.05);
  border-radius: 16px;
  padding: 18px 20px;
  display: grid;
  gap: 10px;
}

.doc-tool-secondary-panel h3 {
  margin: 0;
  font-size: 1rem;
  color: #1f3757;
}

@media (max-width: 768px) {
  .doc-tool-shell {
    padding: 28px 22px;
  }

  .doc-tool-thumb {
    grid-template-columns: 48px 1fr auto;
    padding: 12px 14px;
  }

  .doc-tool-thumb__preview {
    width: 48px;
    height: 48px;
  }
}