:root{--bg:#eef1f4;--ink:#1c2430;--acc:#0f6b5c;--line:#cfd6dd}
*{box-sizing:border-box}
body{margin:0;font:15px system-ui,"Yu Gothic","Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink)}
header{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 14px;background:#fff;border-bottom:1px solid var(--line)}
button,select,input[type=number]{font:inherit;padding:6px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
button.p{background:var(--acc);color:#fff;border-color:var(--acc)}
button:disabled{opacity:.4}
#drop{margin:14px;padding:28px;border:2px dashed var(--line);border-radius:10px;text-align:center;background:#fff}
#drop.over{border-color:var(--acc)}
#bar{margin:0 14px;height:6px;background:var(--line);border-radius:3px;overflow:hidden}
#bar i{display:block;height:100%;width:0;background:var(--acc)}
#msg{margin:6px 14px;color:#566}
main{display:flex;gap:12px;padding:14px;align-items:flex-start}
#thumbs{display:flex;flex-direction:column;gap:6px;min-width:70px}
#thumbs button.on{background:var(--acc);color:#fff}
#stage{flex:1;overflow:auto}
#page{position:relative;background:#fff;box-shadow:0 2px 10px #0003;margin:auto}
#page img{position:absolute;inset:0;width:100%;height:100%}
.blk{position:absolute;outline:1px dashed transparent;white-space:pre-wrap;line-height:1.15;overflow:hidden;background:#fff}
.blk:hover{outline-color:#0f6b5c88}
.blk.sel{outline:2px solid var(--acc)}
.blk.low{background:#fff3b0}
#props{min-width:170px;display:flex;flex-direction:column;gap:6px}
#stage{min-width:0}
@media(max-width:700px){
  main{flex-direction:column;align-items:stretch}
  #stage{width:100%}
  #thumbs{flex-direction:row;overflow-x:auto;min-width:0}
  #thumbs button{white-space:nowrap}
  #props{width:100%}
}
.hd{position:absolute;width:18px;height:18px;background:var(--acc);color:#fff;border-radius:4px;font-size:12px;line-height:18px;text-align:center;z-index:5;touch-action:none;cursor:move;user-select:none}
.hd.rs{cursor:nwse-resize}
.blk.img{background:none;object-fit:fill}
.blk.tbl{overflow:visible}
.blk.tbl table{border-collapse:collapse;width:100%;font-size:inherit;line-height:1.15}
.blk.tbl td{border:1px solid #777;padding:2px 4px;vertical-align:top}