.pdf-tool-shell {
    max-width: 72rem;
    margin: 0 auto;
    padding: 2rem 1rem 3rem;
}

.pdf-tool-root [hidden] {
    display: none !important;
}

.pdf-tool-panel {
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    background: #fff;
}

.pdf-tool-hero {
    max-width: 48rem;
    margin: 0 auto 1.5rem;
    text-align: center;
}

.pdf-tool-hero h1 {
    margin: 0 0 0.75rem;
    color: #1f2937;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
}

.pdf-tool-hero p {
    color: #4b5563;
    line-height: 1.7;
}

.pdf-trust-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.pdf-trust-badge {
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    color: #1e40af;
    background: #dbeafe;
    font-size: 0.78rem;
    font-weight: 700;
}

.pdf-drop-zone {
    display: flex;
    min-height: 14rem;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    border: 2px dashed #60a5fa;
    border-radius: 0.75rem;
    background: #f8fafc;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
}

.pdf-drop-zone:hover,
.pdf-drop-zone:focus,
.pdf-drop-zone.dragover {
    border-color: #2563eb;
    background: #eff6ff;
    outline: none;
}

.pdf-drop-icon {
    margin-bottom: 0.75rem;
    color: #2563eb;
    font-size: 2.5rem;
    line-height: 1;
}

.pdf-drop-title {
    color: #1f2937;
    font-size: 1.05rem;
    font-weight: 700;
}

.pdf-drop-note {
    margin-top: 0.35rem;
    color: #6b7280;
    font-size: 0.85rem;
}

.pdf-button {
    display: inline-flex;
    min-height: 2.5rem;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1rem;
    border: 0;
    border-radius: 0.45rem;
    color: #fff;
    background: #2563eb;
    cursor: pointer;
    font-weight: 700;
    transition: background 0.2s, opacity 0.2s;
}

.pdf-button:hover {
    background: #1d4ed8;
}

.pdf-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.pdf-button--secondary {
    color: #374151;
    background: #e5e7eb;
}

.pdf-button--secondary:hover {
    background: #d1d5db;
}

.pdf-button--success {
    background: #059669;
}

.pdf-button--success:hover {
    background: #047857;
}

.pdf-workspace[hidden],
.pdf-progress[hidden],
.pdf-error[hidden],
.pdf-results[hidden] {
    display: none;
}

.pdf-workspace {
    margin-top: 1.5rem;
}

.pdf-workspace-header,
.pdf-toolbar,
.pdf-action-bar,
.pdf-results-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.pdf-summary {
    color: #4b5563;
    font-size: 0.9rem;
}

.pdf-toolbar {
    justify-content: flex-start;
    margin: 1rem 0;
    padding: 0.75rem;
    border-radius: 0.5rem;
    background: #f3f4f6;
}

.pdf-toolbar button {
    padding: 0.4rem 0.65rem;
    border-radius: 0.35rem;
    color: #374151;
    background: #fff;
    font-size: 0.78rem;
    font-weight: 700;
}

.pdf-toolbar button:hover {
    color: #1d4ed8;
    background: #eff6ff;
}

.pdf-mode-controls {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 1px solid #dbeafe;
    border-radius: 0.5rem;
    background: #eff6ff;
}

.pdf-control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
    gap: 0.75rem;
}

.pdf-control {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    color: #374151;
    font-size: 0.85rem;
    font-weight: 700;
}

.pdf-control input,
.pdf-control select,
.pdf-control textarea {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border: 1px solid #d1d5db;
    border-radius: 0.4rem;
    background: #fff;
    font: inherit;
    font-weight: 400;
}

.pdf-control textarea {
    min-height: 6rem;
    resize: vertical;
}

.pdf-page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
    gap: 0.75rem;
}

.pdf-page-card {
    position: relative;
    overflow: hidden;
    padding: 0.6rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background: #fff;
}

.pdf-page-card.is-selected {
    border-color: #2563eb;
    background: #eff6ff;
}

.pdf-tool-root[data-pdf-tool="delete"] .pdf-page-card.is-selected {
    border-color: #dc2626;
    background: #fef2f2;
}

.pdf-page-card.dragging {
    opacity: 0.4;
}

.pdf-page-card.dragover {
    border-color: #2563eb;
    outline: 2px solid #bfdbfe;
}

.pdf-page-select {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.45rem;
    color: #374151;
    font-size: 0.75rem;
    font-weight: 700;
}

.pdf-thumbnail-frame {
    display: flex;
    height: 9rem;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 0.25rem;
    background: #f3f4f6;
}

.pdf-thumbnail {
    max-width: 90%;
    max-height: 8.5rem;
    transition: transform 0.2s;
}

.pdf-page-label {
    overflow: hidden;
    margin-top: 0.5rem;
    color: #374151;
    font-size: 0.78rem;
    font-weight: 700;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pdf-page-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
    margin-top: 0.5rem;
}

.pdf-page-actions button {
    min-height: 2rem;
    border-radius: 0.3rem;
    color: #1d4ed8;
    background: #dbeafe;
    font-size: 0.8rem;
    font-weight: 800;
}

.pdf-page-actions button:hover {
    background: #bfdbfe;
}

.pdf-page-actions .danger {
    color: #b91c1c;
    background: #fee2e2;
}

.pdf-action-bar {
    position: sticky;
    bottom: 0;
    z-index: 5;
    margin-top: 1rem;
    padding: 0.85rem;
    border-top: 1px solid #d1d5db;
    background: rgba(255, 255, 255, 0.96);
}

.pdf-progress {
    margin-top: 1rem;
}

.pdf-progress-track {
    overflow: hidden;
    height: 0.6rem;
    border-radius: 999px;
    background: #e5e7eb;
}

.pdf-progress-bar {
    width: 0;
    height: 100%;
    background: #2563eb;
    transition: width 0.2s;
}

.pdf-progress-text,
.pdf-status {
    margin-top: 0.45rem;
    color: #4b5563;
    font-size: 0.85rem;
}

.pdf-error {
    margin-top: 1rem;
    padding: 0.85rem 1rem;
    border-left: 4px solid #dc2626;
    color: #991b1b;
    background: #fef2f2;
}

.pdf-results {
    margin-top: 1.25rem;
    padding: 1rem;
    border: 1px solid #a7f3d0;
    border-radius: 0.5rem;
    background: #ecfdf5;
}

.pdf-result-list {
    display: grid;
    gap: 0.6rem;
    margin-top: 0.75rem;
}

.pdf-result-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem;
    border-radius: 0.4rem;
    background: #fff;
}

.pdf-info-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.pdf-info-card {
    padding: 1.1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.6rem;
    background: #fff;
}

.pdf-info-card h2 {
    margin-bottom: 0.5rem;
    color: #1f2937;
    font-size: 1.05rem;
    font-weight: 800;
}

.pdf-info-card p,
.pdf-info-card li {
    color: #4b5563;
    font-size: 0.9rem;
    line-height: 1.6;
}

.pdf-info-card ol,
.pdf-info-card ul {
    padding-left: 1.2rem;
}

@media (max-width: 640px) {
    .pdf-tool-panel {
        padding: 1rem;
    }

    .pdf-page-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .pdf-action-bar .pdf-button {
        flex: 1;
    }
}