diff --git a/index.html b/index.html
index 755f316..3dcd95a 100644
--- a/index.html
+++ b/index.html
@@ -61,9 +61,9 @@ button,input,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!im
 .constraint-input-row .row-actions{display:flex;gap:8px;justify-content:flex-end}
 .work-grid{flex:1;min-height:0;width:100%;max-width:1540px;margin:0 auto;padding:16px 24px;display:grid;grid-template-columns:minmax(0,46fr) minmax(0,54fr);gap:14px;align-items:stretch;overflow:hidden}
 .pane-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.pane-head{height:54px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 16px;font-weight:740;font-size:13px}.pane-body{padding:18px}
-.sticky-pane{min-height:0;overflow:auto}
+.sticky-pane{min-height:0;display:flex;flex-direction:column;overflow:hidden}.sticky-pane>.pane-head{flex-shrink:0}.sticky-pane>.pane-body{flex:1;min-height:0;overflow-y:auto}
 
-.original-pane-head{height:58px;gap:12px;flex-wrap:nowrap}.original-pane-title{display:flex;align-items:center;gap:7px;white-space:nowrap}
+.original-pane-head{height:54px;gap:12px;flex-wrap:nowrap}.original-pane-title{display:flex;align-items:center;gap:7px;white-space:nowrap}
 .paragraph-switcher{display:flex;align-items:center;gap:6px;margin-left:auto;overflow-x:auto;max-width:min(420px,42vw);padding-bottom:1px}
 .para-tab{width:36px;height:34px;border:1px solid #dde0e8;border-radius:9px;background:#fff;color:#626a7c;font-size:13px;font-weight:780;display:grid;place-items:center;padding:0;transition:.15s;flex:none}.para-tab:hover{border-color:#b9baff;background:#f8f8ff;color:#4541d7}.para-tab.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 10px rgba(86,84,245,.14)}.para-tab.has-copy:not(.active){border-color:#cfe4dc;color:#26765a;background:#f7fbf9}
 .view-toggle{display:inline-flex;padding:3px;background:#eff1f5;border-radius:9px;gap:2px;flex:none;margin-left:4px}.view-btn{border:0;background:transparent;color:#737b8d;border-radius:7px;padding:6px 10px;font-size:11px;font-weight:700}.view-btn.active{background:#fff;color:#3936c9;box-shadow:0 1px 4px rgba(28,31,45,.08)}
@@ -87,8 +87,8 @@ button,input,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!im
 .demo-panel{position:fixed;left:14px;bottom:14px;z-index:60}.demo-panel details{background:#fff;border:1px solid #dfe2ea;border-radius:10px;box-shadow:0 7px 20px rgba(23,27,42,.08);font-size:11px;color:#7d8495}.demo-panel summary{cursor:pointer;padding:7px 10px;font-weight:700;color:#666e80}.demo-panel .demo-body{padding:0 9px 9px;display:flex;gap:6px;flex-wrap:wrap;max-width:260px}
 .loading-card{padding:20px 22px}.loading-title{font-size:16px;font-weight:760;margin-bottom:10px}.loading-row{display:flex;align-items:center;gap:9px;padding:7px 0;color:#687084;font-size:12px}.spinner{width:17px;height:17px;border:2px solid #dfe1ff;border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}.loading-dot{width:8px;height:8px;border-radius:50%;background:#d7dbe6}.loading-row.active{color:#4247c7;font-weight:650}.loading-row.active .loading-dot{background:var(--brand)}.loading-hint{color:#b9770b;font-size:12px;font-weight:600;margin-top:8px}@keyframes spin{to{transform:rotate(360deg)}}
 @media(max-width:1180px){.entry-shell{grid-template-columns:1fr 320px}.work-grid{gap:9px;padding-left:12px;padding-right:12px}.work-head{padding-left:14px;padding-right:14px}.pane-head{padding:0 12px}.progress-track{width:100px}.paragraph-switcher{max-width:min(280px,38vw)}}
-@media(max-width:900px){.workbench-shell{height:auto;display:block;overflow:visible}.work-grid{grid-template-columns:1fr;align-items:start;overflow:visible}.sticky-pane{height:auto}.pane-card{min-height:auto}.rewrite-area{min-height:360px}.rewrite-card .rewrite-area{flex:none}.submit-row{padding:0 12px 20px}.work-head-inner{align-items:flex-start}.progress-mini{min-width:0}.demo-panel{display:none}}
-@media(max-width:760px){.entry-shell{display:block;height:auto}.essay-pane{padding:24px 18px}.smart-pane{border-top:1px solid var(--line)}.smart-body{padding:24px 18px}.top-actions{display:none}.chat-wrap{padding:20px 12px 120px}.message{grid-template-columns:30px 1fr;gap:8px}.avatar{width:30px;height:30px}.bubble{padding:16px}.user .bubble{max-width:90%}.agent-table{font-size:11px}.work-grid{padding:12px}.work-head{padding:12px}.work-head-inner{display:block}.progress-mini{margin-top:8px;justify-content:flex-start}.progress-track{width:120px}.original-pane-head{height:auto;min-height:58px;flex-wrap:wrap;padding-top:9px;padding-bottom:9px}.paragraph-switcher{margin-left:0;max-width:100%}.pane-body{padding:14px}}
+@media(max-width:900px){.workbench-shell{height:auto;display:block;overflow:visible}.work-grid{grid-template-columns:1fr;align-items:start;overflow:visible}.sticky-pane{height:auto;display:block;overflow:visible}.sticky-pane>.pane-body{overflow:visible}.pane-card{min-height:auto}.rewrite-area{min-height:360px}.rewrite-card .rewrite-area{flex:none}.submit-row{padding:0 12px 20px}.work-head-inner{align-items:flex-start}.progress-mini{min-width:0}.demo-panel{display:none}}
+@media(max-width:760px){.entry-shell{display:block;height:auto}.essay-pane{padding:24px 18px}.smart-pane{border-top:1px solid var(--line)}.smart-body{padding:24px 18px}.top-actions{display:none}.chat-wrap{padding:20px 12px 120px}.message{grid-template-columns:30px 1fr;gap:8px}.avatar{width:30px;height:30px}.bubble{padding:16px}.user .bubble{max-width:90%}.agent-table{font-size:11px}.work-grid{padding:12px}.work-head{padding:12px}.work-head-inner{display:block}.progress-mini{margin-top:8px;justify-content:flex-start}.progress-track{width:120px}.original-pane-head{height:auto;min-height:54px;flex-wrap:wrap;padding-top:9px;padding-bottom:9px}.paragraph-switcher{margin-left:0;max-width:100%}.pane-body{padding:14px}}
 </style>
 </head>
 <body>