*{box-sizing:border-box}html,body{margin:0;height:100%;font:14px system-ui,sans-serif;color:#222;background:#eceff1}
body{display:flex;flex-direction:column;overflow:hidden}
#bar,#tools{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:6px 8px;background:#263238;color:#fff}
#tools{background:#37474f}
.btn,.tool,select{border:1px solid #90a4ae;background:#fff;color:#222;border-radius:6px;padding:7px 11px;font-size:14px;cursor:pointer;min-height:36px}
.btn.small{padding:4px 8px}.primary{background:#1976d2;color:#fff;border-color:#1976d2}.danger{background:#c62828;color:#fff}
.tool.active{background:#ffb300;border-color:#ffb300;font-weight:600}
.sep{width:1px;height:26px;background:#78909c}.scale{font-weight:600}
.opt label{color:#fff}.hint{color:#cfd8dc;font-size:13px;flex:1;min-width:200px}
#main{flex:1;display:flex;min-height:0}
#viewport{flex:1;overflow:auto;position:relative;background:#78909c;touch-action:none}
#stage{position:relative;margin:20px;display:inline-block;box-shadow:0 2px 10px #0006;background:#fff}
#canvas{display:block}#svg{position:absolute;left:0;top:0;width:100%;height:100%;overflow:visible}
#side{width:300px;overflow:auto;background:#fff;border-left:1px solid #b0bec5;padding:8px}
#side h3{margin:8px 0 4px;font-size:15px}
.row{display:flex;align-items:center;gap:6px;padding:5px;border-bottom:1px solid #eee;cursor:pointer;font-size:13px}
.row.sel{background:#fff3cd}.sw{width:14px;height:14px;border-radius:3px;flex:none}
.row .v{margin-left:auto;font-weight:600;white-space:nowrap}
#edit label{display:block;margin:6px 0}#edit input[type=text],#edit textarea{width:100%}
table.tot{width:100%;border-collapse:collapse;font-size:13px}table.tot td{padding:3px;border-bottom:1px solid #eee}
dialog{border:none;border-radius:10px;box-shadow:0 4px 30px #0008;max-width:420px}
dialog input[type=text]{width:100%;font-size:18px;padding:6px}menu{display:flex;gap:8px;justify-content:flex-end;padding:0}
#toast{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:#263238;color:#fff;padding:8px 14px;border-radius:6px;display:none}
.proj{display:flex;gap:6px;align-items:center;margin:4px 0}.proj span{flex:1}
@media (max-width:800px){#side{width:220px}.hint{display:none}}
/* ---- desktop polish ---- */
body{font-family:"Segoe UI",system-ui,-apple-system,Roboto,sans-serif;background:#1f2a30}
#bar{background:#1c262b;padding:6px 10px;gap:4px;border-bottom:1px solid #0d1417}
#tools{background:#2b3a42;padding:5px 10px;gap:4px;border-bottom:1px solid #0d1417}
.btn,.tool,select{display:inline-flex;align-items:center;gap:6px;background:#34454e;color:#e6eef2;border:1px solid #40535d;border-radius:6px;padding:6px 10px;min-height:34px;font-size:13px;transition:background .12s}
.btn:hover,.tool:hover{background:#41555f}
.btn.icon{padding:6px 8px}
.btn.primary{background:#1e88e5;border-color:#1e88e5;color:#fff}.btn.primary:hover{background:#1976d2}
.btn.danger{background:#c62828;border-color:#c62828;color:#fff}
.tool.active{background:#ffb300;border-color:#ffb300;color:#1c262b}
svg.ic{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.grow{flex:1}.sep{background:#40535d;height:24px;margin:0 4px}
#pageInfo,#zoomInfo{color:#cfd8dc;min-width:46px;text-align:center;font-variant-numeric:tabular-nums}
.scale{padding:0 6px;font-size:13px}
.opt label{color:#cfd8dc;display:flex;align-items:center;gap:6px;font-size:13px}
.opt input[type=text]{background:#1c262b;color:#fff;border:1px solid #40535d;border-radius:5px;padding:6px}
.opt input[type=color]{width:34px;height:28px;border:none;background:none;padding:0}
.hint{color:#9fb3bd;font-size:12px;text-align:right}
#viewport{background:#4b5b63}
#side{width:320px;background:#f7f9fa;border-left:1px solid #0d1417;padding:10px 12px;transition:width .15s}
body.noside #side{display:none}
.sidehead{display:flex;align-items:center;justify-content:space-between}
.sidehead .btn{background:#e3e9ec;color:#333;border-color:#cfd8dc}
#side h3{color:#263238;text-transform:uppercase;letter-spacing:.04em;font-size:12px}
table.tot td{padding:5px 3px}.row{border-radius:4px}.row:hover{background:#eef3f5}
#side .btn{color:#fff}
dialog .btn{color:#222;background:#eceff1;border-color:#cfd8dc}dialog .btn.primary{color:#fff;background:#1e88e5}
dialog select{background:#fff;color:#222;border-color:#cfd8dc;width:100%}
@media (max-width:1400px){.tool span.t,.btn span.t{display:inline}.hint{display:none}}
@media (max-width:1100px){#tools .tool span.t{display:none}}
#bar{flex-wrap:nowrap}
.sidehead .btn{color:#333}
@media (max-width:1440px){#saveBtn .t,#projBtn .t,#fit .t,#panelBtn .t{display:none}#bar .btn{padding:6px 8px}}
#side .sidehead .btn{color:#37474f}
/* ---- empty state ---- */
#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px}
body.hasdoc #empty{display:none}body:not(.hasdoc) #stage{display:none}
.emptybox{background:#fff;border-radius:14px;padding:32px 28px;text-align:center;max-width:380px;box-shadow:0 8px 30px #0005;color:#37474f}
.emptybox h2{margin:8px 0 6px;font-size:22px}.emptybox p{margin:0 0 18px;color:#607d8b}
svg.ic.big{width:56px;height:56px;color:#1e88e5;stroke-width:1.4}
.bigbtn{font-size:16px;padding:12px 22px;min-height:46px}
#drawBar,#moreBtn,#sheetHandle{display:none}
#moreMenu[hidden]{display:none}
#moreMenu{position:fixed;z-index:20;top:calc(52px + env(safe-area-inset-top));right:calc(8px + env(safe-area-inset-right));background:#263238;border:1px solid #40535d;border-radius:10px;padding:6px;display:flex;flex-direction:column;gap:4px;min-width:210px;box-shadow:0 8px 24px #0008}
#moreMenu .btn{justify-content:flex-start;min-height:44px;font-size:15px;background:transparent;border-color:transparent}
#moreMenu .btn:hover{background:#34454e}
.mrow{display:flex;align-items:center;justify-content:space-between;color:#e6eef2;padding:4px 10px;font-size:15px;gap:8px}
button,label,select,input{touch-action:manipulation}
/* ---- phone ---- */
@media (max-width:700px){
  body{padding:env(safe-area-inset-top) env(safe-area-inset-right) 0 env(safe-area-inset-left)}
  #bar{padding:6px 8px;gap:4px;flex-wrap:nowrap}
  #bar .sep,#saveBtn,#projBtn,#zoomOut,#zoomIn,#zoomInfo,#fit,#scaleBtn,#units,#csvBtn,#pdfBtn,#panelBtn,#bar .grow{display:none}
  #moreBtn{display:inline-flex;margin-left:auto}
  #bar label.btn.primary .t{display:inline}
  #prev,#next{padding:6px}
  #pageInfo{min-width:38px;font-size:13px}
  .scale{background:#34454e;border:1px solid #40535d;border-radius:16px;padding:6px 10px;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:130px;cursor:pointer}
  #main{flex-direction:column;order:2}
  #tools{order:4;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding:6px 6px calc(6px + env(safe-area-inset-bottom));gap:4px;background:#1c262b;border-top:1px solid #0d1417;border-bottom:none;scrollbar-width:none}
  #tools::-webkit-scrollbar{display:none}
  #tools .tool{flex-direction:column;gap:2px;min-width:58px;min-height:52px;padding:5px 6px;font-size:11px;background:transparent;border-color:transparent;color:#cfd8dc}
  #tools .tool span.t{display:inline!important}
  #tools .tool svg.ic{width:22px;height:22px}
  #tools .tool.active{background:#ffb300;color:#1c262b}
  #tools .hint{display:none}
  #drawBar{order:3;display:none;align-items:center;gap:6px;padding:6px 8px;background:#2b3a42;border-top:1px solid #0d1417;overflow-x:auto}
  body.hasdoc.drawing #drawBar{display:flex}
  #drawSlot{display:flex;align-items:center;gap:6px;flex:1;min-width:0}
  #drawSlot .opt label{font-size:0;gap:0}  /* hide words, keep inputs */
  #drawSlot .opt input[type=text]{width:100%;min-width:90px;font-size:16px}
  #drawSlot .opt:nth-child(2){flex:1}
  #finishBtn,#undoPt{display:none}
  body.multi #finishBtn,body.hasdraft #undoPt{display:inline-flex}
  body.cal #drawSlot .opt{display:none}
  #drawBar .btn{min-height:40px;white-space:nowrap}
  #finishBtn{background:#1e88e5;border-color:#1e88e5;color:#fff}
  #viewport{flex:1}
  #stage{margin:10px}
  #side{width:auto;order:2;max-height:44px;overflow:hidden;padding:0;border-left:none;border-top:1px solid #0d1417;border-radius:14px 14px 0 0;box-shadow:0 -4px 16px #0004;transition:max-height .2s}
  body:not(.hasdoc) #side{display:none}
  body.noside #side{display:block}
  body.sheetopen #side{max-height:58vh;overflow:auto}
  #sheetHandle{display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;position:sticky;top:0;background:#f7f9fa;cursor:pointer;font-size:13px;color:#263238}
  #sheetHandle .grip{position:absolute;left:50%;top:5px;width:36px;height:4px;margin-left:-18px;border-radius:2px;background:#b0bec5}
  #sheetSum{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600;padding-top:4px}
  .chev{color:#1e88e5;font-weight:600;padding-top:4px}
  #side>*:not(#sheetHandle){margin-left:12px;margin-right:12px}
  .sidehead .btn{display:none}
  input,select,textarea{font-size:16px!important}
  dialog{width:92vw;max-width:92vw}
  .row{padding:9px 5px;font-size:14px}
}
@media (max-width:700px){
  #bar label.btn.primary{white-space:nowrap;padding:6px 10px}
  #bar label.btn.primary .t{font-size:0}#bar label.btn.primary .t::after{content:"Open";font-size:14px}
  .scale{max-width:none;flex:1;min-width:0}
  #moreBtn{margin-left:0}#moreBtn .t{display:none}
  #toast{bottom:calc(150px + env(safe-area-inset-bottom));max-width:90vw;text-align:center}
}
/* ---- loupe ---- */
#loupe{position:fixed;width:140px;height:140px;border-radius:50%;border:3px solid #263238;box-shadow:0 4px 18px #0007,0 0 0 2px #fff inset;pointer-events:none;z-index:30;display:none;background:#fff}
#loupeBtn.on{background:#1e88e5;border-color:#1e88e5;color:#fff}
.opt.lp{display:none;gap:4px;align-items:center}body.placing .opt.lp{display:flex}
.opt.lp select{min-height:30px;padding:2px 4px}
.opt.calbar{display:none;gap:4px;align-items:center}body.adj .opt.calbar{display:flex}
body:not(.caladj) #calSetBtn{display:none}
.nud{padding:4px 6px!important}
@media (max-width:700px){
  body.cal #drawSlot .opt.lp,body.cal #drawSlot .opt.calbar{display:none}
  body.cal.placing #drawSlot .opt.lp{display:flex}body.cal.adj #drawSlot .opt.calbar{display:flex}
  body.adj #drawSlot .opt.lp{display:none}
  #drawSlot{overflow-x:auto}
  .nud{min-width:40px;justify-content:center}
}
@media (min-width:701px){#tools{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin}#tools>*{flex:none}#tools .hint{flex:1 1 0;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}
@media (min-width:701px) and (max-width:1500px){#tools .tool span.t{display:none}}
@media (max-width:700px){body.caladj #undoPt{display:none}body.caladj #cancelBtn .t{display:none}body.caladj #ptSel{padding:4px 6px}}
@media (max-width:700px){body.cal.adj.placing #drawSlot .opt.lp,body.adj.placing #drawSlot .opt.lp{display:none}}
.btn:disabled{opacity:.4;cursor:default}
#moreMenu .btn:disabled{opacity:.35}
@media (min-width:701px){#redoMenu{display:none}}
@media (max-width:700px){#redoBtn{display:none}#undoBtn{padding:6px}}
body.aimtool .opt.lp{display:flex}
#snapBtn.on{background:#00a152;border-color:#00a152;color:#fff}
body:not(.placing) #loupeBtn,body:not(.placing) #loupeMag{display:none}
@media (max-width:700px){body.cal.adj.placing #drawSlot .opt.lp,body.adj.placing #drawSlot .opt.lp{display:none}}
.opt.sz{display:none}body.sleevetool .opt.sz{display:flex}
.lyr{display:flex;align-items:center;gap:6px;padding:4px 2px;font-size:13px;cursor:pointer}
#layers h3{display:flex;align-items:center;justify-content:space-between}
#layers .btn.small{color:#333;background:#e3e9ec;border-color:#cfd8dc;min-height:26px;padding:2px 8px}
@media (min-width:701px) and (max-width:1500px){#sleeveCsvBtn .t{display:none}}
@media (max-width:700px){#sleeveCsvBtn{display:none}}