:root{--bg-color:#f8fafc;--panel-bg:#fff;--border-color:#e2e8f0;--text-primary:#0f172a;--text-secondary:#475569;--accent-color:#2563eb;--accent-hover:#1d4ed8;--danger-color:#dc2626;--canvas-bg:#e2e8f0;--hover-bg:#0000000d;color:var(--text-primary);background-color:var(--bg-color);font-family:system-ui,-apple-system,sans-serif;line-height:1.5}@media (prefers-color-scheme:dark){:root{--bg-color:#0f172a;--panel-bg:#1e293b;--border-color:#334155;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent-color:#3b82f6;--accent-hover:#60a5fa;--canvas-bg:#0f172a;--hover-bg:#ffffff0d}}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;font-size:14px}.app{flex-direction:column;height:100vh;display:flex;overflow:hidden}header{background-color:var(--panel-bg);border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;padding:12px 20px;display:flex}h1{font-size:18px;font-weight:600}.header-tabs{gap:8px;margin-left:24px;display:flex}.tab-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:500;transition:all .2s;display:inline-flex}.tab-btn:hover{color:var(--text-primary);background-color:var(--hover-bg)}.tab-btn.active{color:var(--accent-color);background-color:#3b82f61a;font-weight:600}.main-layout{flex:1;display:flex;overflow:hidden}.sidebar{background-color:var(--panel-bg);border-right:1px solid var(--border-color);flex-direction:column;flex-shrink:0;gap:20px;width:320px;padding:20px;display:flex;overflow-y:auto}.workspace{background-color:var(--canvas-bg);flex-direction:column;flex:1;display:flex;position:relative;overflow:hidden}.toolbar{background-color:var(--panel-bg);border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;padding:8px 16px;display:flex}.viewport{flex:1;justify-content:center;align-items:center;padding:24px;display:flex;overflow:auto}.crop-wrapper{background-color:#fff;border-radius:2px;position:relative;box-shadow:0 4px 12px #00000026}.crop-overlay{cursor:crosshair;z-index:10;width:100%;height:100%;position:absolute;top:0;left:0}.crop-rect{fill:#0000;stroke:var(--accent-color);stroke-width:2px;cursor:move}.crop-shroud{fill:#0006}.handle{fill:#fff;stroke:var(--accent-color);stroke-width:2px}.handle:hover{fill:var(--accent-color)}.file-drop{border:2px dashed var(--border-color);text-align:center;cursor:pointer;color:var(--text-secondary);border-radius:6px;padding:30px 10px;transition:all .2s}.file-drop:hover{border-color:var(--accent-color)}.file-drop.drag-over{transform:scale(1.02);box-shadow:0 0 0 3px #3b82f640;border-color:var(--accent-color)!important;color:var(--accent-color)!important;background-color:#3b82f61f!important}.btn{cursor:pointer;border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;padding:8px 16px;font-size:13px;font-weight:500;transition:background-color .2s,border-color .2s;display:inline-flex}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--accent-hover)}.btn-secondary{border-color:var(--border-color);color:var(--text-secondary);background-color:#0000}.btn-secondary:hover:not(:disabled){background-color:var(--hover-bg);color:var(--text-primary)}.btn:disabled{opacity:.5;cursor:not-allowed}.form-group{flex-direction:column;gap:6px;display:flex}label{color:var(--text-secondary);font-size:12px;font-weight:600}.input{border:1px solid var(--border-color);background-color:var(--panel-bg);color:var(--text-primary);border-radius:4px;outline:none;padding:8px 12px}.input:focus{border-color:var(--accent-color)}.grid-2{grid-template-columns:1fr 1fr;gap:10px;display:grid}.pages-grid{border:1px solid var(--border-color);border-radius:4px;grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:8px;max-height:150px;padding:8px;display:grid;overflow-y:auto}.page-thumb-btn{aspect-ratio:1/1.4;background-color:var(--bg-color);border:1px solid var(--border-color);cursor:pointer;color:var(--text-secondary);border-radius:3px;justify-content:center;align-items:center;font-size:11px;font-weight:700;display:flex}.page-thumb-btn.active{border-color:var(--accent-color);color:var(--accent-color);background-color:#3b82f61a}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:16px;height:16px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.status-bar{background-color:var(--panel-bg);border-top:1px solid var(--border-color);color:var(--text-secondary);padding:6px 12px;font-size:12px}.merge-viewport{flex:1;justify-content:center;align-items:flex-start;padding:40px 24px;display:flex;overflow-y:auto}.merge-card{background-color:var(--panel-bg);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;gap:20px;width:100%;max-width:640px;padding:24px;display:flex;box-shadow:0 4px 12px #0000000d}.merge-file-list{border:1px solid var(--border-color);background-color:var(--bg-color);border-radius:6px;flex-direction:column;gap:8px;max-height:380px;padding:8px;display:flex;overflow-y:auto}.merge-file-item{background-color:var(--panel-bg);border:1px solid var(--border-color);border-radius:6px;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;display:flex}.file-info{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.file-name{text-overflow:ellipsis;white-space:nowrap;color:var(--text-primary);font-size:13px;font-weight:500;overflow:hidden}.file-meta{color:var(--text-secondary);font-size:11px}.item-actions{align-items:center;gap:4px;display:flex}.icon-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;width:28px;height:28px;transition:all .2s;display:flex}.icon-btn:hover:not(:disabled){background-color:var(--hover-bg);color:var(--text-primary);border-color:var(--border-color)}.icon-btn:disabled{opacity:.3;cursor:not-allowed}.icon-btn-danger:hover:not(:disabled){color:var(--danger-color);background-color:#dc26261a;border-color:#dc262633}.images-workspace{background-color:var(--canvas-bg);flex-direction:column;flex:1;display:flex;overflow:hidden}.images-viewport{flex-direction:column;flex:1;gap:20px;padding:24px;display:flex;overflow-y:auto}.images-empty-state{text-align:center;background-color:var(--panel-bg);border:1px solid var(--border-color);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;max-width:600px;margin:40px auto;padding:40px 24px;transition:all .2s;display:flex;box-shadow:0 4px 12px #0000000d}.images-empty-state.drag-over{transform:scale(1.01);box-shadow:0 0 0 3px #3b82f640;border-color:var(--accent-color)!important;background-color:#3b82f614!important}.images-features-list{text-align:left;grid-template-columns:1fr 1fr;gap:16px;width:100%;margin-top:24px;display:grid}.images-feature-item{background-color:var(--hover-bg);border-radius:6px;align-items:flex-start;gap:10px;padding:12px;font-size:12px;display:flex}.images-feature-icon{color:var(--accent-color);flex-shrink:0;margin-top:2px}.images-grid{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:18px;display:grid}.image-card{background-color:var(--panel-bg);border:1.5px solid var(--border-color);cursor:pointer;border-radius:8px;flex-direction:column;transition:all .2s;display:flex;position:relative;overflow:hidden;box-shadow:0 2px 6px #0000000a}.image-card:hover{border-color:var(--accent-color);transform:translateY(-2px);box-shadow:0 6px 16px #00000014}.image-card.selected{border-color:var(--accent-color);box-shadow:0 0 0 2px #3b82f640,0 4px 12px #0000000f}.image-card-header{background-color:var(--hover-bg);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.image-card-checkbox{cursor:pointer;align-items:center;gap:6px;font-size:12px;font-weight:600;display:flex}.image-card-thumb-container{background-color:var(--bg-color);justify-content:center;align-items:center;min-height:220px;max-height:260px;padding:12px;display:flex;position:relative;overflow:hidden}.image-card-img{object-fit:contain;background-color:#fff;border-radius:3px;max-width:100%;max-height:236px;box-shadow:0 2px 8px #0000001f}.image-card-overlay{opacity:0;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background-color:#0f172aa6;justify-content:center;align-items:center;gap:10px;transition:opacity .2s;display:flex;position:absolute;inset:0}.image-card:hover .image-card-overlay{opacity:1}.image-card-footer{color:var(--text-secondary);border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:8px 12px;font-size:11px;display:flex}.progress-banner{background-color:var(--panel-bg);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;gap:8px;padding:16px 20px;display:flex;box-shadow:0 2px 8px #0000000a}.progress-bar-bg{background-color:var(--border-color);border-radius:3px;width:100%;height:6px;overflow:hidden}.progress-bar-fill{background-color:var(--accent-color);border-radius:3px;height:100%;transition:width .3s}.image-modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background-color:#000000bf;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.image-modal-content{background-color:var(--panel-bg);border:1px solid var(--border-color);border-radius:12px;flex-direction:column;width:90vw;max-width:960px;height:85vh;display:flex;overflow:hidden;box-shadow:0 20px 40px #0000004d}.image-modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:14px 20px;display:flex}.image-modal-body{background-color:var(--bg-color);flex:1;justify-content:center;align-items:center;padding:20px;display:flex;overflow:auto}.image-modal-footer{border-top:1px solid var(--border-color);background-color:var(--panel-bg);justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.segmented-control{background-color:var(--hover-bg);border:1px solid var(--border-color);border-radius:6px;gap:2px;padding:3px;display:flex}.segmented-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;flex:1;justify-content:center;align-items:center;gap:4px;padding:5px 8px;font-size:12px;font-weight:500;transition:all .15s;display:flex}.segmented-btn.active{background-color:var(--panel-bg);color:var(--accent-color);font-weight:600;box-shadow:0 1px 3px #0000001a}.badge-tag{color:var(--accent-color);background-color:#3b82f61f;border-radius:12px;align-items:center;padding:2px 8px;font-size:11px;font-weight:600;display:inline-flex}