:root{--ink:#1F2328;--pg:#536878;--pgd:#3E4F5C;--tint:#E9EDF1;--line:#E3E6E9;--soft:#F6F7F8;--mut:#5B6470;--bg:#ECEEF0}
*{box-sizing:border-box}
html,body{height:100%;margin:0;overflow:hidden;overscroll-behavior:none}
body{font:13px/1.3 Jost,system-ui,sans-serif;color:var(--ink);background:#fff;-webkit-text-size-adjust:100%}
button,select,input,textarea{font:inherit;color:inherit}
h2{margin:0;font-size:13px;font-weight:600}
.grow{flex:1 1 0}
[hidden]{display:none!important}

#app{height:100vh;height:100dvh;display:grid;
  grid-template:"top top top" 40px "rail stage pane" minmax(0,1fr) / 44px minmax(0,1fr) 296px}

/* buttons */
.ib{width:32px;height:32px;flex:none;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:7px;background:transparent;cursor:pointer;padding:0}
.ib.sm{width:28px;height:28px}
.ib svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.700;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.ib.sm svg{width:16px;height:16px}
.ib:hover{background:var(--tint)}
.ib:disabled{opacity:.35;cursor:default;background:transparent}
.ib.on{background:var(--pg);color:#fff}
.btn{height:28px;padding:0 12px;border:1px solid #C9CFD5;border-radius:7px;background:#fff;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--soft)}
.btn.primary{background:var(--pg);border-color:var(--pg);color:#fff;font-weight:500}
.btn.primary:hover{background:var(--pgd)}
.btn.big{height:36px;width:100%;font-size:14px}
.btn:disabled{opacity:.55;cursor:default}
:focus-visible{outline:2px solid var(--pg);outline-offset:1px}

#top{grid-area:top;display:flex;align-items:center;gap:6px;padding:0 10px;border-bottom:1px solid var(--line)}
.brand{font-size:17px;font-weight:600;letter-spacing:.02em;color:var(--pg)}

#rail{grid-area:rail;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0;border-right:1px solid var(--line);background:var(--soft)}
.swatch{position:relative;width:26px;height:26px;margin-top:5px;flex:none;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px #C9CFD5;background:#536878;overflow:hidden}
.swatch input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;border:0;padding:0}

#stage{grid-area:stage;display:grid;grid-template-rows:34px minmax(0,1fr) 54px;min-width:0;background:var(--bg)}
#opts{display:flex;align-items:center;gap:8px;padding:0 10px;background:#fff;border-bottom:1px solid var(--line);overflow-x:auto;white-space:nowrap;scrollbar-width:none}
#opts::-webkit-scrollbar{display:none}
#opts label{color:var(--mut)}
#opts input[type=range]{width:110px}
#opts output{min-width:26px;font-variant-numeric:tabular-nums}
#opts .hint{color:var(--mut)}
#view{position:relative;min-height:0;overflow:hidden;display:flex;align-items:center;justify-content:center}
#cv{display:block;background:#fff;box-shadow:0 1px 2px rgba(31,35,40,.14),0 6px 18px rgba(31,35,40,.10);touch-action:none}
#empty{position:absolute;left:0;right:0;bottom:14px;text-align:center;color:var(--mut);pointer-events:none;padding:0 16px}
#lib{display:flex;align-items:center;gap:6px;padding:0 8px;background:#fff;border-top:1px solid var(--line);min-width:0}
.libadd{width:40px;height:40px;flex:none;border:1px dashed #C9CFD5;border-radius:6px;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0}
.libadd svg{width:16px;height:16px;fill:none;stroke:var(--mut);stroke-width:1.700;stroke-linecap:round}
#libList{display:flex;gap:6px;overflow-x:auto;min-width:0;flex:1;padding:2px 0;scrollbar-width:thin}
#libList button{width:40px;height:40px;flex:none;padding:0;border:1px solid var(--line);border-radius:6px;background:#fff center/cover no-repeat;cursor:pointer}
#libList button:hover{border-color:var(--pg)}

#pane{grid-area:pane;display:flex;flex-direction:column;min-height:0;border-left:1px solid var(--line);background:#fff}
#pane section{padding:6px 10px 8px;display:flex;flex-direction:column;gap:6px;min-height:0}
#styles{flex:none;border-bottom:1px solid var(--line)}
#tabs{display:none}
#layers{flex:1 1 0}
.head{display:flex;align-items:center;gap:4px;min-height:28px}
.row{display:flex;align-items:center;gap:6px;min-width:0}
.row label{color:var(--mut);flex:none}
.row label.gap{margin-left:4px}
.row input[type=range]{flex:1 1 40px;min-width:40px}
.row output{min-width:28px;text-align:right;font-variant-numeric:tabular-nums}
select,input[type=number],input[type=password],textarea{height:28px;border:1px solid #C9CFD5;border-radius:7px;background:#fff;padding:0 6px;min-width:0}
textarea{height:auto;padding:6px;width:100%;resize:vertical}
#style{flex:1 1 0}
#source{flex:none;width:84px}
#seed{width:104px;flex:none}
#blend{flex:none;width:118px}
input[type=range]{accent-color:var(--pg);height:20px;margin:0}
#chips{display:flex;gap:5px;overflow-x:auto;padding-bottom:2px;scrollbar-width:thin}
.chip{height:26px;flex:none;display:inline-flex;align-items:center;gap:4px;padding:0 10px;border:1px solid #C9CFD5;border-radius:13px;background:#fff;cursor:pointer;white-space:nowrap}
.chip:hover{border-color:var(--pg)}
.chip.save{border-style:dashed;color:var(--mut)}
.chip .x{margin-right:-4px;width:16px;height:16px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--mut)}
.chip .x:hover{background:var(--tint);color:var(--ink)}
#status{min-height:16px;font-size:12px;color:var(--mut);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#status.err{color:#A3341F}

#layerList{flex:1 1 0;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:2px;margin:0 -4px;padding:0 4px 4px}
.layer{display:flex;align-items:center;gap:8px;padding:3px 4px;border-radius:7px;cursor:pointer;flex:none}
.layer:hover{background:var(--soft)}
.layer.sel{background:var(--tint);box-shadow:inset 0 0 0 1.500px var(--pg)}
.layer canvas{width:30px;height:30px;flex:none;border-radius:4px;border:1px solid var(--line);background:#fff}
.layer .nm{min-width:0;flex:1}
.layer .nm b{display:block;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.layer .nm span{font-size:11px;color:var(--mut)}
.layer.off canvas,.layer.off .nm{opacity:.45}

dialog{border:0;border-radius:12px;padding:0;width:min(440px,calc(100vw - 24px));max-height:calc(100dvh - 24px);box-shadow:0 12px 40px rgba(31,35,40,.25);color:var(--ink)}
dialog::backdrop{background:rgba(31,35,40,.35)}
dialog form{display:flex;flex-direction:column;max-height:calc(100dvh - 24px)}
.dhead{display:flex;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line)}
.dbody{padding:10px 14px 14px;display:flex;flex-direction:column;gap:6px;overflow-y:auto}
.dbody label{color:var(--mut);margin-top:4px}
.hint{color:var(--mut);font-size:12px}
.grid2{display:grid;grid-template-columns:minmax(0,150px) minmax(0,1fr) 34px;gap:6px 8px;align-items:center;margin-top:4px}
.grid2 label{margin:0}
.grid2 output{text-align:right;font-variant-numeric:tabular-nums}
.rowd{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
#keyIn{width:100%}

/* phones in portrait: tools in a row, Styles and Layers in a bottom sheet that never scrolls the page */
@media (max-width:640px){
  #app{grid-template:"top" 40px "rail" 38px "stage" minmax(0,1fr) "pane" auto / minmax(0,1fr)}
  #rail{flex-direction:row;justify-content:flex-start;padding:0 8px;gap:4px;border-right:0;border-bottom:1px solid var(--line);overflow-x:auto}
  .swatch{margin:0 0 0 6px}
  #stage{grid-template-rows:30px minmax(0,1fr) 46px}
  #libList button,.libadd{width:34px;height:34px}
  #pane{border-left:0;border-top:1px solid var(--line);height:264px}
  #tabs{display:flex;gap:3px;padding:4px 10px 0;flex:none}
  #tabs button{flex:1;height:26px;border:0;border-radius:7px;background:var(--soft);color:var(--mut);cursor:pointer}
  #tabs button[aria-selected=true]{background:var(--tint);color:var(--ink);font-weight:600}
  #pane[data-tab=styles] #layers,#pane[data-tab=layers] #styles{display:none}
  #styles{border-bottom:0;flex:1 1 0}
  #pane section{padding:4px 10px 6px;gap:5px}
  .btn.big{height:38px}
  #status{min-height:14px}
}
/* short windows (phones in landscape): drop the library strip to give the canvas the room */
@media (max-height:480px){
  #lib{display:none}
  #stage{grid-template-rows:34px minmax(0,1fr)}
  #pane section{gap:4px;padding-top:4px;padding-bottom:5px}
}
@media (max-width:640px) and (max-height:600px){
  #lib{display:none}
  #stage{grid-template-rows:30px minmax(0,1fr)}
}