*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f1f3f6;--panel:#fff;--border:#d9dee5;--accent:#2563eb;--accent-dark:#1d4ed8;--green:#16a34a;--text:#1f2937;--muted:#6b7280}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.workspace{display:flex;flex-direction:column;height:100vh}.tabs{display:flex;gap:4px;padding:8px 16px 0;background:var(--panel);border-bottom:1px solid var(--border)}.tab{border:1px solid transparent;border-bottom:none;background:transparent;color:var(--muted);border-radius:8px 8px 0 0;padding:8px 16px;font-size:14px;font-weight:500;cursor:pointer}.tab:hover{color:var(--text);background:#f6f8fa}.tab.active{color:var(--accent);background:var(--bg);border-color:var(--border);margin-bottom:-1px}.tab-panel{flex:1 1;min-height:0;overflow:hidden}.app{display:flex;flex-direction:column;flex:1 1;min-height:0;width:100%}.topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border);flex-wrap:wrap}.topbar h1{font-size:16px;font-weight:600;margin-right:auto}.topbar .filename{color:var(--muted);font-size:13px}.btn{border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:8px;padding:7px 14px;font-size:14px;cursor:pointer}.btn:hover{background:#f6f8fa}.btn:disabled{opacity:.5;cursor:default}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-dark)}.main{display:flex;flex:1 1;overflow:hidden}.viewer{flex:1 1;overflow:auto;padding:24px}.dropzone{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border:2px dashed var(--border);border-radius:14px;color:var(--muted);text-align:center;padding:24px;cursor:pointer}.dropzone.drag{border-color:var(--accent);background:#eef4ff}.dropzone .big{font-size:18px;color:var(--text);font-weight:500}.page-wrap{position:relative;margin:0 auto 24px;box-shadow:0 2px 10px rgba(0,0,0,.12);background:#fff}.page-wrap img{display:block;width:100%;height:auto}.page-num{text-align:center;color:var(--muted);font-size:12px;margin-bottom:10px}.titem{position:absolute;cursor:text;border-radius:2px}.titem:hover{outline:2px solid rgba(37,99,235,.75);background:rgba(37,99,235,.08)}.titem.edited{background:#fff;outline:2px solid rgba(22,163,74,.8);color:#000;overflow:hidden;white-space:nowrap}.titem.deleted{background:#fff;outline:2px dashed rgba(220,38,38,.7)}.edit-box{position:absolute;z-index:10}.edit-input{width:100%;height:100%;border:2px solid var(--accent);border-radius:4px;background:#fff;color:#000;padding:0 3px;outline:none;font-family:Helvetica,Arial,sans-serif;box-shadow:0 3px 12px rgba(0,0,0,.25)}.edit-handle{position:absolute;top:50%;width:8px;height:130%;min-height:22px;transform:translateY(-50%);background:var(--accent);border-radius:4px;cursor:ew-resize;z-index:11}.edit-handle:hover{background:var(--accent-dark)}.edit-handle.left{left:-5px}.edit-handle.right{right:-5px}.sidebar{width:300px;background:var(--panel);border-left:1px solid var(--border);padding:16px;overflow:auto;display:flex;flex-direction:column;gap:12px}.sidebar h2{font-size:14px}.sidebar .hint{font-size:13px;color:var(--muted);line-height:1.45}.edit-row{border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:13px}.edit-row .old{color:var(--muted);text-decoration:line-through;word-break:break-word}.edit-row .new{color:var(--green);word-break:break-word}.edit-row .meta{color:var(--muted);font-size:11px;margin-bottom:2px}.edit-row button{margin-top:6px;font-size:12px;padding:3px 8px}.spinner{margin:60px auto;text-align:center;color:var(--muted)}.merge-area{flex:1 1;overflow:auto;padding:24px}.merge-list{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:10px}.merge-card{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:10px 12px;box-shadow:0 1px 4px rgba(0,0,0,.06);cursor:-webkit-grab;cursor:grab}.merge-card.dragging{opacity:.5}.merge-card:active{cursor:-webkit-grabbing;cursor:grabbing}.merge-index{width:24px;text-align:center;color:var(--muted);font-size:13px;font-weight:600;flex-shrink:0}.merge-thumb{width:56px;height:72px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:#f6f8fa;border:1px solid var(--border);border-radius:6px;overflow:hidden}.merge-thumb img{max-width:100%;max-height:100%;display:block}.merge-badge{font-size:12px;font-weight:600;color:var(--muted)}.merge-info{flex:1 1;min-width:0}.merge-name{font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.merge-sub{font-size:12px;color:var(--muted);margin-top:2px}.merge-actions{display:flex;gap:4px;flex-shrink:0}.merge-actions .btn{padding:5px 9px;font-size:14px;line-height:1}.merge-footer{display:flex;gap:8px;justify-content:center;margin-top:6px}