:root{font-family:Arial,sans-serif;color:#343434;background:#f1f1ee;color-scheme:light}
*{box-sizing:border-box}html,body,#viewer{width:100%;height:100%;margin:0;overflow:hidden}
#viewer{position:relative;isolation:isolate}canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab;outline:none}canvas:active{cursor:grabbing}canvas:focus-visible{outline:3px solid #555555;outline-offset:-3px}
.loading{position:absolute;z-index:3;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:15px;padding:24px;text-align:center;background:#f1f1ee;font-size:13px;line-height:1.5}.loading-title{font-size:19px;font-weight:500}.track{width:180px;height:3px;background:#d4d4d0;overflow:hidden}.track span{display:block;height:100%;width:0;background:#666666;transition:width .15s linear}.loading.error .track{display:none}
.hint{position:absolute;left:18px;bottom:14px;max-width:calc(100% - 102px);margin:0;padding:9px 12px;border-radius:6px;background:#fffffff0;color:#444444;font-size:12px;line-height:1.4;pointer-events:none}
.zoom{position:absolute;right:18px;bottom:18px;display:flex;flex-direction:column;background:#fffffff5;border:1px solid #d4d4d0;border-radius:8px;overflow:hidden}.zoom button{display:grid;place-items:center;width:44px;height:43px;padding:0;border:0;background:transparent;color:#333333;font:28px/1 Arial;cursor:pointer;-webkit-tap-highlight-color:transparent}.zoom button:hover{background:#e8e8e5}.zoom button:active{background:#d8d8d5}.zoom button:focus-visible{outline:2px solid #555555;outline-offset:-3px}.zoom button:disabled{color:#aaaaaa;cursor:default}.divider{height:1px;background:#ddddda;margin:0 8px}
[hidden]{display:none!important}
@media(max-width:520px){.hint{left:10px;bottom:10px;max-width:calc(100% - 82px);font-size:11px;padding:8px 10px}.zoom{right:10px;bottom:10px}}
@media(prefers-reduced-motion:reduce){.track span{transition:none}}