.mc-spread-gutter{position:absolute;top:0;bottom:0;left:50%;width:1px;background:repeating-linear-gradient(to bottom,#999 0px,#999 4px,transparent 4px,transparent 8px);pointer-events:none;z-index:100;opacity:.7}.mc-spread-gutter:before,.mc-spread-gutter:after{content:"";position:absolute;left:0;width:1px;height:20px}.mc-spread-gutter:before{top:0;background:linear-gradient(to bottom,transparent,#999)}.mc-spread-gutter:after{bottom:0;background:linear-gradient(to top,transparent,#999)}.mc-spread-gutter-zone{position:absolute;top:0;bottom:0;pointer-events:none;z-index:99}.mc-spread-gutter-zone--left{right:50%;width:20px;background:linear-gradient(to left,rgba(255,140,0,.1),transparent)}.mc-spread-gutter-zone--right{left:50%;width:20px;background:linear-gradient(to right,rgba(255,140,0,.1),transparent)}.mc-spread-labels{position:absolute;top:4px;left:0;right:0;display:flex;justify-content:space-between;pointer-events:none;z-index:101;padding:0 8px}.mc-spread-labels span{font-size:10px;color:#aaa;font-family:Arial,sans-serif;letter-spacing:.5px;text-transform:uppercase;background:#fff9;padding:1px 6px;border-radius:3px}.mc-page-thumb.spread.spread-left{min-width:120px;flex-shrink:0}.mc-page-thumb.spread.spread-left .mc-page-thumb-img{width:120px;aspect-ratio:2 / 1;position:relative}.mc-page-thumb.spread.spread-right{display:none}.mc-spread-badge{position:absolute;top:4px;left:50%;transform:translate(-50%);background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:8px;font-weight:700;letter-spacing:1px;text-transform:uppercase;padding:2px 8px;border-radius:3px;line-height:1.2;z-index:5;pointer-events:none;box-shadow:0 1px 3px #00000040}.mc-spread-toggle{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none;padding:6px 0}.mc-spread-toggle input[type=checkbox]{display:none}.mc-spread-toggle-slider{position:relative;width:36px;height:20px;background:#ccc;border-radius:10px;transition:background .25s ease;flex-shrink:0}.mc-spread-toggle-slider:after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;background:#fff;border-radius:50%;transition:transform .25s ease;box-shadow:0 1px 3px #0003}.mc-spread-toggle input[type=checkbox]:checked+.mc-spread-toggle-slider{background:linear-gradient(135deg,#667eea,#764ba2)}.mc-spread-toggle input[type=checkbox]:checked+.mc-spread-toggle-slider:after{transform:translate(16px)}.mc-spread-toggle-label{font-size:13px;color:#444;font-weight:500}.mc-spread-section{border-top:1px solid #eee;padding-top:12px;margin-top:12px}.mc-spread-section .mc-tool-section-title{font-size:12px;font-weight:600;color:#666;text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.mc-spread-controls{padding:4px 0}.mc-spread-controls .mc-btn-outline{width:100%;border:1px solid #ddd;background:#fff;color:#555;font-size:12px;padding:6px 12px;border-radius:4px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:6px;justify-content:center}.mc-spread-controls .mc-btn-outline:hover{border-color:#667eea;color:#667eea;background:#667eea0a}.mc-spread-indicator{display:inline-flex;align-items:center;gap:6px;margin-left:12px;padding:3px 10px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:11px;font-weight:600;border-radius:4px;letter-spacing:.3px;vertical-align:middle;animation:mc-spread-fadein .3s ease}.mc-spread-indicator .spread-icon{display:inline-block;width:14px;height:10px;border:1.5px solid #fff;border-radius:1px;position:relative}.mc-spread-indicator .spread-icon:after{content:"";position:absolute;top:1px;bottom:1px;left:50%;width:1px;background:#fff;opacity:.6}@keyframes mc-spread-fadein{0%{opacity:0;transform:translateY(2px)}to{opacity:1;transform:translateY(0)}}.mc-canvas-spread-mode #canvas-wrapper{position:relative}.mc-canvas-spread-mode .canvas-container{box-shadow:0 2px 20px #0000001f}@media (max-width: 768px){.mc-page-thumb.spread.spread-left{min-width:90px}.mc-page-thumb.spread.spread-left .mc-page-thumb-img{width:90px}.mc-spread-badge{font-size:7px;padding:1px 5px}.mc-spread-indicator{font-size:10px;padding:2px 6px}}