.tool-ui{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-xl);margin-bottom:var(--space-8);padding:var(--space-6)}@media (max-width:640px){.tool-ui{padding:var(--space-4)}}.pdf-merge{gap:var(--space-5)}.pdf-merge,.pm-upload{display:flex;flex-direction:column}.pm-upload{align-items:center;background:var(--color-bg);border:2px dashed var(--color-border);border-radius:var(--radius-xl);cursor:pointer;gap:var(--space-3);justify-content:center;padding:var(--space-8) var(--space-6);text-align:center;transition:border-color var(--transition-fast),background var(--transition-fast),transform var(--transition-fast)}.pm-upload.drag-over,.pm-upload:hover{background:color-mix(in srgb,var(--color-primary) 5%,var(--color-bg));border-color:var(--color-primary);transform:scale(1.01)}.pm-upload__icon{align-items:center;background:color-mix(in srgb,var(--color-primary) 10%,var(--color-bg));border-radius:var(--radius-full);color:var(--color-primary);display:flex;height:64px;justify-content:center;width:64px}.pm-upload h3{color:var(--color-text-primary);font-size:var(--text-base);font-weight:var(--font-semibold);margin:0}.pm-upload p{color:var(--color-text-muted);font-size:var(--text-sm);margin:0}.pm-upload__formats{display:flex;gap:var(--space-2)}.pm-upload__formats span{background:var(--color-bg-tertiary);border-radius:999px;color:var(--color-text-secondary);font-size:var(--text-xs);font-weight:var(--font-semibold);padding:2px 10px}.pm-file-item:focus-visible,.pm-file-item__controls button:focus-visible,.pm-upload:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px}.pm-error{background:color-mix(in srgb,var(--color-error) 8%,var(--color-bg));border:1px solid var(--color-error);border-radius:var(--radius-md);color:var(--color-error);margin:0;padding:var(--space-3) var(--space-4)}.pm-file-list{display:flex;flex-direction:column;gap:var(--space-3)}.pm-file-list__header{align-items:center;display:flex;font-weight:var(--font-semibold);justify-content:space-between}.pm-file-list__header,.pm-file-list__hint{color:var(--color-text-secondary);font-size:var(--text-sm)}.pm-file-list__hint{margin:0}.pm-files{display:flex;flex-direction:column;gap:var(--space-2)}.pm-file-item{align-items:center;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);cursor:grab;display:flex;gap:var(--space-3);padding:var(--space-3) var(--space-4);transition:all var(--transition-fast);user-select:none}.pm-file-item:hover{background:color-mix(in srgb,var(--color-primary) 5%,var(--color-bg));border-color:var(--color-primary)}.pm-file-item.dragging{opacity:.4}.pm-file-item.drag-over{background:color-mix(in srgb,var(--color-primary) 8%,var(--color-bg));border-color:var(--color-primary);border-style:dashed}.pm-file-item__handle{color:var(--color-text-muted);cursor:grab;flex-shrink:0}.pm-file-item__icon{color:var(--color-error);flex-shrink:0}.pm-file-item__name{color:var(--color-text-primary);flex:1;font-size:var(--text-sm);font-weight:var(--font-medium);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pm-file-item__controls{align-items:center;display:flex;flex-shrink:0;gap:2px}.pm-file-item__controls button{background:transparent;border:0;border-radius:var(--radius-md);color:var(--color-text-secondary);cursor:pointer;font-size:1.15rem;min-height:32px;min-width:32px}.pm-file-item__controls button:hover:not(:disabled){background:color-mix(in srgb,var(--color-primary) 10%,var(--color-bg));color:var(--color-primary)}.pm-file-item__controls button:disabled{cursor:default;opacity:.35}.pm-file-item__remove{background:transparent;border:none;border-radius:var(--radius-md);color:var(--color-text-muted);cursor:pointer;flex-shrink:0;padding:4px;transition:all var(--transition-fast)}.pm-file-item__remove:hover{background:color-mix(in srgb,var(--color-error) 15%,transparent);color:var(--color-error)}.pm-actions{display:flex;gap:var(--space-3);justify-content:flex-end}.pm-progress{align-items:center;display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-8)}.pm-progress__spinner{animation:spin .8s linear infinite;border:4px solid var(--color-border);border-radius:50%;border-top-color:var(--color-primary);height:48px;width:48px}@keyframes spin{to{transform:rotate(1turn)}}.pm-progress p{color:var(--color-text-secondary);font-size:var(--text-sm);margin:0}.pm-download{align-items:center;animation:fadeInUp .3s ease-out;background:color-mix(in srgb,var(--color-success) 5%,var(--color-bg));border:2px solid color-mix(in srgb,var(--color-success) 20%,transparent);border-radius:var(--radius-2xl);display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-8);text-align:center}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.pm-download h3{color:var(--color-success);font-size:var(--text-xl);font-weight:var(--font-bold);margin:0}.pm-download p{color:var(--color-text-secondary);margin:0}.pm-download__hint{font-size:var(--text-sm);line-height:1.5;max-width:60ch}.pm-download a{text-decoration:none}@media (max-width:480px){.pm-actions{flex-direction:column}.pm-actions .btn{width:100%}.pm-file-item{gap:var(--space-2);padding:var(--space-2)}.pm-file-item__controls button{min-height:36px;min-width:36px}}@media (prefers-reduced-motion:reduce){.pm-download,.pm-progress__spinner{animation:none}}