:root{
  --bg:#121418; --chrome:#17191e; --panel:#1c1f25; --panel2:#23272f; --line:#30353f; --line2:#3b414d;
  --text:#eef0f4; --muted:#9aa3b2; --accent:#ff9f0a; --accent2:#ffb340; --sel:#3d8bff; --danger:#ff5a4f;
  --stage:#2b2f36; --radius:12px; --tb:52px; --strip:64px; --lw:292px; --rw:300px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Arial,sans-serif;font-size:14px;
  -webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}
input,select,textarea{-webkit-user-select:text;user-select:text}
button,input,select,textarea{font:inherit;color:inherit}
button{background:var(--panel2);border:1px solid transparent;border-radius:10px;padding:8px 12px;cursor:pointer;min-height:36px;white-space:nowrap}
button:hover{border-color:var(--line2)}
button:active{transform:translateY(1px)}
button.accent{background:var(--accent);color:#141414;font-weight:700}
button.danger{background:#3a2322;color:#ffd6d2}
button.ghost{background:transparent}
button:disabled{opacity:.45;pointer-events:none}
.ib{width:38px;min-width:38px;height:38px;padding:0;display:inline-flex;align-items:center;justify-content:center;font-size:18px}
.hidden{display:none!important}
input[type=text],input[type=number],input[type=email],input[type=password],select,textarea{
  background:#0f1115;border:1px solid var(--line2);border-radius:9px;padding:8px 10px;min-height:36px;width:100%;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
input[type=range]{width:100%;accent-color:var(--accent)}
input[type=color]{width:40px;height:32px;padding:2px;border-radius:8px;background:#0f1115;border:1px solid var(--line2)}

/* ---------- layout ---------- */
.app{display:grid;grid-template-rows:var(--tb) 1fr;height:100%}
.topbar{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--chrome);border-bottom:1px solid var(--line);
  overflow-x:auto;scrollbar-width:none}
.topbar::-webkit-scrollbar{display:none}
.brand{font-weight:800;letter-spacing:.3px;white-space:nowrap}
.brand span{color:var(--accent)}
.doc-title{max-width:210px;min-width:90px;background:transparent!important;border:1px solid transparent!important;font-weight:700;font-size:15px}
.doc-title:focus{border-color:var(--line2)!important}
.tb-group{display:flex;gap:4px;align-items:center;flex:0 0 auto}
.tb-spacer{flex:1}
.zoom-pct{min-width:64px;padding:6px 8px;font-variant-numeric:tabular-nums}
.lang{min-width:44px}
.account{max-width:160px;overflow:hidden;text-overflow:ellipsis}
.main{position:relative;display:flex;min-height:0}

/* tool strip — всегда видна, даже когда панели свёрнуты */
.toolstrip{width:var(--strip);flex:0 0 var(--strip);background:var(--chrome);border-right:1px solid var(--line);
  overflow-y:auto;padding:6px 5px;display:flex;flex-direction:column;gap:3px;z-index:6;scrollbar-width:none}
.toolstrip::-webkit-scrollbar{display:none}
.tool{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;width:100%;min-height:52px;padding:5px 2px;
  background:transparent;border-radius:11px;color:var(--muted)}
.tool svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tool small{font-size:9.5px;line-height:1.05;text-align:center;white-space:normal}
.tool.active{background:#2d2f35;color:var(--accent);border-color:#4a3a1f}
.tool.toggle-on{color:var(--sel)}
.strip-sep{height:1px;background:var(--line);margin:4px 6px}

.lpanel,.rpanel{background:var(--panel);display:flex;flex-direction:column;min-height:0;z-index:5}
.lpanel{width:var(--lw);flex:0 0 var(--lw);border-right:1px solid var(--line)}
.rpanel{width:var(--rw);flex:0 0 var(--rw);border-left:1px solid var(--line)}
.app.lp-collapsed .lpanel{display:none}
.app.rp-collapsed .rpanel{display:none}
.tabs{display:flex;gap:4px;padding:8px;border-bottom:1px solid var(--line);flex:0 0 auto}
.tabs button{flex:1;padding:7px 4px;font-size:12.5px;background:transparent;color:var(--muted)}
.tabs button.active{background:var(--panel2);color:var(--text)}
.tab-body{overflow-y:auto;padding:10px 10px 30px;flex:1;min-height:0;-webkit-overflow-scrolling:touch}

.stage{position:relative;flex:1;min-width:0;background:var(--stage);overflow:hidden}
#cv{position:absolute;inset:0;width:100%;height:100%;touch-action:none;display:block}

/* ---------- panel content ---------- */
.sec{margin-bottom:14px}
.sec-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:4px 2px 8px;display:flex;align-items:center;justify-content:space-between;gap:6px}
.card{background:var(--panel2);border:1px solid var(--line);border-radius:var(--radius);padding:10px}
.row{display:flex;align-items:center;gap:8px;margin:7px 0}
.row>label{flex:1;color:#d7dbe3;font-size:13px}
.row .w80{width:86px;flex:0 0 86px}
.row .w110{width:120px;flex:0 0 120px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.hint{font-size:12px;color:var(--muted);line-height:1.4}
.switch{position:relative;width:44px;height:26px;flex:0 0 44px;border-radius:99px;background:#454b56;cursor:pointer;transition:.15s}
.switch::after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:.15s}
.switch.on{background:var(--accent)}
.switch.on::after{left:21px}
.chip{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:99px;background:#2b3039;font-size:12px;color:#cfd5df}
.formula{font-family:ui-monospace,Menlo,monospace;font-size:12px;color:#ffd08a}

/* параметры швеи — список именованных полей */
.params{display:flex;flex-direction:column;gap:7px}
.prow{display:flex;align-items:center;gap:8px}
.prow>label{flex:1;color:#d7dbe3;font-size:13px;line-height:1.15}
.prow>input{width:96px;flex:0 0 96px;text-align:right;font-variant-numeric:tabular-nums}
.prow>[data-p=del]{flex:0 0 auto;min-height:34px;padding:2px 7px;background:transparent}

/* measures table */
.mtable{width:100%;border-collapse:collapse}
.mtable td{padding:4px 3px;vertical-align:middle}
.mtable td input{min-height:34px;padding:6px 8px}
.mtable .code{width:62px}
.mtable .val{width:74px}
.mtable .del{width:34px}
.empty{padding:18px 10px;text-align:center;color:var(--muted);border:1px dashed var(--line2);border-radius:12px}

/* blocks / projects cards */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.bcard{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:8px;cursor:pointer;display:flex;flex-direction:column;gap:6px;min-height:120px}
.bcard:hover{border-color:var(--accent)}
.bcard .thumb{flex:1;border-radius:8px;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:80px}
.bcard .thumb img,.bcard .thumb svg{max-width:100%;max-height:100%}
.bcard b{font-size:12.5px}
.bcard.soon{opacity:.5;cursor:default}
.pcard{position:relative}
.pcard .acts{display:flex;gap:4px}
.pcard .acts button{flex:1;padding:4px;min-height:30px;font-size:12px}

/* layers */
.layer{display:flex;align-items:center;gap:6px;padding:6px;border-radius:9px;cursor:pointer}
.layer:hover{background:#262a31}
.layer.sel{background:#1f3350}
.layer .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.layer button{min-height:28px;padding:2px 6px;font-size:12px;background:transparent}
.layer .lsize{background:#26303f;color:#cfe0ff;font-variant-numeric:tabular-nums;font-size:11.5px;padding:3px 8px;white-space:nowrap}
.layer .lsize:hover{border-color:var(--sel)}

/* ---------- floating quick toolbar ---------- */
.quickbar{position:absolute;z-index:20;display:flex;align-items:center;gap:3px;padding:5px;background:rgba(28,31,37,.97);
  border:1px solid var(--line2);border-radius:14px;box-shadow:0 10px 30px rgba(0,0,0,.45);max-width:calc(100% - 16px);overflow-x:auto;scrollbar-width:none}
.quickbar::-webkit-scrollbar{display:none}
.quickbar button{min-height:40px;min-width:40px;padding:4px 8px;background:transparent;display:inline-flex;align-items:center;justify-content:center;gap:5px;font-size:13px}
.quickbar button:hover{background:#2a2e36}
.quickbar .sw{width:20px;height:20px;border-radius:50%;border:2px solid #fff3}
.quickbar .val{font-variant-numeric:tabular-nums;font-weight:700;color:#fff}
.quickbar .qsep{width:1px;height:26px;background:var(--line2);margin:0 2px}
.quickbar svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.popover{position:absolute;z-index:25;background:#1f2229;border:1px solid var(--line2);border-radius:14px;padding:12px;box-shadow:0 14px 40px rgba(0,0,0,.5);min-width:230px;max-width:calc(100% - 16px)}
.palette{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.palette button{width:32px;height:32px;min-height:32px;border-radius:50%;padding:0;border:2px solid #0000}
.palette button.cur{border-color:#fff}
.hintbar{position:absolute;left:50%;top:10px;transform:translateX(-50%);z-index:15;background:rgba(20,22,27,.92);border:1px solid var(--line2);
  border-radius:12px;padding:8px 14px;font-size:13px;max-width:calc(100% - 20px);text-align:center;pointer-events:none}
.done-btn{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);z-index:16;background:var(--accent);color:#141414;font-weight:800;padding:10px 22px;border-radius:14px;min-height:44px}
.toast{position:absolute;left:50%;bottom:20px;transform:translateX(-50%) translateY(20px);z-index:40;background:#101216;border:1px solid var(--line2);
  border-radius:12px;padding:9px 14px;font-size:13px;opacity:0;pointer-events:none;transition:.2s;max-width:calc(100% - 24px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- modals ---------- */
.modal{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;padding:16px}
.mcard{width:min(560px,100%);max-height:92vh;overflow:auto;background:#1b1e24;border:1px solid var(--line2);border-radius:18px;padding:18px;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.mcard.wide{width:min(780px,100%)}
.mcard h2{margin:0 0 4px;font-size:19px}
.mcard .sub{color:var(--muted);font-size:13px;margin-bottom:14px}
.mfoot{display:flex;justify-content:flex-end;gap:8px;margin-top:16px;flex-wrap:wrap}
.sizes{display:grid;grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:10px}
.size-card{background:var(--panel2);border:2px solid var(--line);border-radius:14px;padding:10px 8px;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;min-height:132px}
.size-card:hover,.size-card.cur{border-color:var(--accent)}
.size-card .sheet{background:#fff;border-radius:3px;box-shadow:0 3px 10px rgba(0,0,0,.35)}
.size-card .inf{width:64px;height:64px;border-radius:10px;background:repeating-linear-gradient(0deg,#fff 0 7px,#dfe3ea 7px 8px),repeating-linear-gradient(90deg,#fff 0 7px,#dfe3ea 7px 8px);background-blend-mode:multiply}
.size-card b{font-size:13px}
.size-card span{font-size:11px;color:var(--muted)}
.xcards{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.xcard{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:12px;cursor:pointer;text-align:left;white-space:normal;min-height:84px}
.xcard:hover{border-color:var(--accent)}
.xcard b{display:block;margin-bottom:4px}
.xcard span{font-size:12px;color:var(--muted);line-height:1.35}
.formula-builder{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.formula-builder button{min-height:36px;padding:6px 10px}
.kv{display:flex;justify-content:space-between;gap:8px;padding:5px 0;border-bottom:1px solid #262a31;font-size:13px}
.kv b{font-variant-numeric:tabular-nums}

/* ---------- responsive: panels become overlays ---------- */
.more{display:none}
.menu-list{display:flex;flex-direction:column;gap:4px;min-width:210px}
.menu-list button{justify-content:flex-start;text-align:left;width:100%}
@media (max-width:1100px){
  .tb-group.actions button:not(#btnExport),.topbar .lang{display:none}
  .more{display:inline-flex}
}
@media (max-height:860px),(max-width:640px){
  .toolstrip{gap:2px;padding:4px 5px}
  .tool{min-height:38px;padding:3px 2px}
  .tool small{display:none}
  .strip-sep{margin:2px 6px}
}
@media (max-width:1180px){
  .rpanel{position:absolute;right:0;top:0;bottom:0;box-shadow:-12px 0 30px rgba(0,0,0,.35)}
}
@media (max-width:980px){
  .lpanel{position:absolute;left:var(--strip);top:0;bottom:0;box-shadow:12px 0 30px rgba(0,0,0,.35)}
  .brand{display:none}
}
@media (max-width:640px){
  :root{--strip:56px;--lw:min(300px,86vw);--rw:min(300px,86vw)}
  .doc-title{max-width:120px;min-width:60px}
  .topbar{gap:5px;padding:6px}
  #btnExport,#btnZoomOut,#btnZoomIn{display:none}
  .zoom-pct{min-width:52px}
  .account{max-width:84px}
  .xcards{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
}

/* ---------- сенсорные экраны (iPhone/iPad): крупные удобные цели ---------- */
@media (pointer:coarse){
  :root{--strip:68px;--tb:56px}
  .toolstrip{gap:4px;padding:6px}
  .tool{min-height:58px;padding:7px 2px}
  .tool small{display:block;font-size:10px}          /* подписи инструментов не прячем */
  .tool svg{width:27px;height:27px}
  .strip-sep{margin:5px 6px}
  button{min-height:44px}
  .ib{width:44px;min-width:44px;height:44px;font-size:20px}
  .quickbar{gap:4px;padding:6px}
  .quickbar button{min-height:48px;min-width:48px;font-size:15px;padding:6px 12px}
  .quickbar svg{width:24px;height:24px}
  .quickbar .val{font-size:15px}
  .quickbar .qsep{height:30px}
  .switch{width:52px;height:30px;flex-basis:52px}
  .switch::after{width:24px;height:24px}
  .switch.on::after{left:25px}
  /* 16px — чтобы iOS не увеличивал страницу при фокусе поля */
  input[type=text],input[type=number],input[type=email],input[type=password],select,textarea{min-height:44px;font-size:16px}
  .tabs button{padding:11px 4px;font-size:13.5px}
  .mtable td input{min-height:42px;font-size:16px}
  .palette button{width:38px;height:38px;min-height:38px}
  .done-btn{min-height:52px;font-size:15px;bottom:22px}
}