:root{
    --bg:#1b1e24; --chrome:#23272f; --chrome-2:#2a2f38; --panel:#20242b; --rail:#262b34;
    --ink:#e7ecf3; --ink-soft:#aeb7c4; --muted:#7b8698; --line:#333b46; --line-2:#3d4653;
    --accent:#2f81f7; --accent-ink:#fff; --accent-soft:#1e3350; --danger:#e5484d; --ok:#3fb950;
    --ui:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    --mono:ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;
  }
  *{box-sizing:border-box}
  html,body{margin:0;height:100%;overflow:hidden;overscroll-behavior:none;background:var(--bg);color:var(--ink);font-family:var(--ui);font-size:13px}
  #cadApp{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden}
  /* top bar */
  #topbar{display:flex;align-items:center;gap:4px 8px;padding:6px 10px;background:var(--chrome);border-bottom:1px solid var(--line);flex-wrap:wrap;overflow:visible;position:relative}
  /* werkruimte-schakelaar (Fusion-stijl: Ontwerp <-> Simulatie) */
  .wsseg{display:inline-flex;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:8px;padding:2px;margin:0 8px 0 2px;gap:2px;flex-shrink:0}
  .wsbtn{display:inline-flex;align-items:center;gap:5px;padding:4px 11px;border:none;background:transparent;color:var(--ink-soft);font:inherit;font-size:12px;font-weight:600;border-radius:6px;cursor:pointer;white-space:nowrap}
  .wsbtn:hover{color:var(--ink)}
  .wsbtn.on{background:var(--accent);color:#fff}
  .wsbtn svg{opacity:.92}
  #btnHelp{flex-shrink:0;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-2);background:var(--chrome-2);color:var(--ink-soft);font-weight:700;font-size:14px;cursor:pointer;margin-right:4px}
  #btnHelp:hover{border-color:var(--accent);color:#cfe3ff}
  .qa{flex-shrink:0;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;border:1px solid var(--line-2);background:var(--chrome-2);color:var(--ink-soft);cursor:pointer;padding:0}
  .qa:hover{border-color:var(--accent);color:#cfe3ff} .qa:disabled{opacity:.4;cursor:default} .qa svg{width:16px;height:16px}
  #ctxMenu{position:fixed;z-index:80;display:none;flex-direction:column;min-width:184px;padding:5px;background:var(--chrome);border:1px solid var(--line-2);border-radius:10px;box-shadow:0 16px 42px rgba(0,0,0,.55);font-size:12px}
  #ctxMenu .ctxitem{display:block;width:100%;text-align:left;padding:7px 11px;border:none;background:transparent;color:var(--ink);border-radius:6px;cursor:pointer;font:inherit}
  #ctxMenu .ctxitem:hover{background:var(--chrome-2)}
  #ctxMenu .ctxitem.danger:hover{background:rgba(255,90,90,.16);color:#ffb4b4}
  #ctxMenu .ctxsep{height:1px;background:var(--line);margin:4px 6px}
  #marquee{position:fixed;z-index:75;display:none;border:1px solid #5aa0ff;background:rgba(90,160,255,.12);pointer-events:none;border-radius:2px}
  .hkey{display:inline-block;min-width:16px;text-align:center;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:4px;padding:1px 6px;font-family:var(--mono);font-size:11px;color:var(--ink)}
  .hrow{display:flex;gap:10px;align-items:baseline;margin:5px 0;font-size:12.5px;line-height:1.4}
  .hrow .hk{flex:0 0 130px} .hrow .hd{color:var(--ink-soft)}
  .hgrid{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;margin:4px 0 2px}
  .hsc{font-size:12px;color:var(--ink-soft);display:flex;align-items:center;gap:5px;flex-wrap:wrap;line-height:1.5}
  @media (max-width:520px){ .hgrid{grid-template-columns:1fr} }
  /* elke werkruimte-ribbon: groepen breken netjes af naar meerdere rijen zodat ALLE knoppen zichtbaar zijn */
  .ribbon{display:flex;align-items:center;flex:1;min-width:0;flex-wrap:wrap;gap:2px 0;row-gap:3px}
  /* inline label+control-blokjes in de FEM-ribbon */
  .febox{display:flex;flex-direction:column;gap:2px;padding:2px 8px;border-left:1px solid var(--line)}
  .febox:first-child{border-left:none}
  .febox label{font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
  .febox select,.febox input{background:var(--chrome-2);border:1px solid var(--line-2);border-radius:6px;color:var(--ink);font:inherit;font-size:11.5px;padding:3px 5px}
  .febadge{display:inline-block;min-width:14px;text-align:center;background:var(--accent-soft);border-radius:8px;padding:0 4px;font-size:10px;margin-left:3px;color:#cfe3ff}
  #topbar .brand{font-weight:700;font-size:13.5px;letter-spacing:.02em;margin-right:8px;color:var(--ink)}
  #topbar .brand a{color:var(--muted);text-decoration:none;font-weight:500}
  #topbar .brand a:hover{color:var(--ink)}
  .tgrp{display:flex;align-items:center;gap:1px;padding:0 4px;border-left:1px solid var(--line);flex-shrink:0}
  .tgrp:first-of-type{border-left:none}
  .tgrp .lbl{font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-right:1px}
  .tb{display:inline-flex;flex-direction:column;align-items:center;gap:1px;min-width:36px;padding:4px 4px;border:1px solid transparent;border-radius:7px;background:transparent;color:var(--ink-soft);font:inherit;font-size:9.5px;cursor:pointer;line-height:1.1;white-space:nowrap}
  .tb svg{width:18px;height:18px}
  /* Smallere schermen: houd de topbar op ÉÉN rij door gericht te verkleinen (i.p.v. wrappen naar 2 rijen).
     We raken alleen top-level ribbon-knoppen (.tgrp>.tb) zodat de flyout-menu-items leesbaar blijven. */
  @media (max-width:1600px){ .tgrp .lbl{display:none} }   /* panel-labels (MAKEN/WIJZIGEN/STUDIE…) weg = grootste besparing */
  @media (max-width:1280px){ .tgrp>.tb{min-width:30px;padding:3px 3px;font-size:8.5px} .tgrp>.tb svg{width:16px;height:16px} .tgrp{padding:0 2px} .febox{padding:2px 5px} .febox select,.febox input{font-size:10.5px;padding:2px 4px} }
  @media (max-width:1040px){ .tgrp>.tb{font-size:0;gap:0;min-width:26px} .tgrp>.tb svg{width:18px;height:18px} }   /* zeer smal: icoon-only ribbon-knoppen */
  /* Fusion-stijl paneel-dropdown: kernknoppen zichtbaar, de rest achter een chevron (geen scroll) */
  .tdrop{position:relative;display:inline-flex;align-self:stretch}
  .tmore{display:inline-flex;align-items:center;justify-content:center;min-width:15px;padding:0 3px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);cursor:pointer;font-size:10px;line-height:1}
  .tmore:hover{background:var(--chrome-2);color:var(--ink)}
  .tdrop.open .tmore{background:var(--accent-soft);color:#cfe3ff;border-color:var(--accent)}
  .tmenu{position:absolute;top:calc(100% + 5px);left:0;z-index:40;display:none;flex-direction:column;gap:1px;padding:5px;background:var(--chrome);border:1px solid var(--line-2);border-radius:10px;box-shadow:0 14px 34px rgba(0,0,0,.5)}
  .tdrop.open .tmenu{display:flex}
  .tmenu .tb{flex-direction:row;justify-content:flex-start;gap:9px;width:100%;min-width:160px;padding:7px 10px;font-size:11.5px;white-space:nowrap;border-radius:6px}
  .tmenu .tb:hover{background:var(--chrome-2)}
  .tmenu .tb svg{width:16px;height:16px;flex:0 0 16px}
  .tb:hover{background:var(--chrome-2);border-color:var(--line-2);color:var(--ink)}
  .tb.on{background:var(--accent-soft);border-color:var(--accent);color:#cfe3ff}
  .tb.wide{flex-direction:row;min-width:auto;padding:6px 10px;font-size:12px}
  .spacer{flex:1}
  /* body */
  #cadBody{flex:1;display:flex;min-height:0}
  #browser,#props{width:230px;background:var(--panel);display:flex;flex-direction:column;flex-shrink:0}
  #browser{border-right:1px solid var(--line)}
  #props{border-left:1px solid var(--line)}
  .pnl-h{padding:9px 12px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}
  .pnl-sub{padding:7px 12px 3px;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
  .node .del{background:none;border:none;color:var(--muted);cursor:pointer;font-size:13px;line-height:1;padding:2px 4px;border-radius:4px}
  .node .del:hover{color:#ffb4b4;background:rgba(255,90,90,.14)}
  .fr-head{font-weight:700;font-size:12.5px;color:var(--ink)}
  .fr-sub{font-size:10px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:2px 0 8px;padding-bottom:7px;border-bottom:1px solid var(--line)}
  .fr-body{display:flex;flex-direction:column;gap:5px}
  .fr-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:12px}
  .fr-row span{color:var(--muted)} .fr-row b{font-variant-numeric:tabular-nums;white-space:nowrap}
  .fr-note{margin-top:8px;padding:6px 8px;border-radius:6px;font-size:11px;line-height:1.4}
  .fr-note.warn{background:rgba(242,176,74,.12);color:#f2b04a} .fr-note.bad{background:rgba(255,90,90,.13);color:#ff8f8f} .fr-note.ok{background:rgba(95,208,138,.12);color:#5fd08a}
  #tree{flex:1;overflow:auto;padding:4px 0}
  .node{display:flex;align-items:center;gap:6px;padding:5px 10px 5px 12px;cursor:pointer;font-size:12.5px;color:var(--ink-soft);user-select:none;-webkit-user-select:none}
  .node:hover{background:var(--rail)}
  .node.sel{background:var(--accent-soft);color:#cfe3ff}
  .node .ic{width:15px;height:15px;flex-shrink:0;opacity:.85}
  .node .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .node .vis{width:18px;height:18px;border:none;background:transparent;color:var(--muted);cursor:pointer;padding:0;flex-shrink:0}
  .node .vis:hover{color:var(--ink)}
  .node.hidden .nm{opacity:.45;text-decoration:line-through}
  #viewport{flex:1;position:relative;min-width:0;background:radial-gradient(circle at 50% 35%,#2a3038,#171a1f 78%)}
  #glcanvas{display:block;width:100%;height:100%;touch-action:none;overscroll-behavior:none}
  #vpHud{position:absolute;left:10px;bottom:10px;font-size:11px;color:var(--muted);pointer-events:none;text-shadow:0 1px 2px #000}
  #vpCube{position:absolute;right:14px;top:14px;display:flex;flex-direction:column;align-items:center;gap:6px;z-index:6}
  #vcScene{width:82px;height:82px;perspective:320px}
  #vcCube{width:100%;height:100%;position:relative;transform-style:preserve-3d}
  .vcf{position:absolute;width:58px;height:58px;left:12px;top:12px;display:flex;align-items:center;justify-content:center;font-size:8.5px;font-weight:700;letter-spacing:.03em;color:var(--ink-soft);background:rgba(38,43,52,.8);border:1px solid var(--line-2);cursor:pointer;user-select:none;backface-visibility:hidden;border-radius:3px}
  .vcf:hover{background:var(--accent-soft);color:#cfe3ff;border-color:var(--accent)}
  .vcf[data-view=front]{transform:rotateY(0deg) translateZ(29px)}
  .vcf[data-view=back]{transform:rotateY(180deg) translateZ(29px)}
  .vcf[data-view=right]{transform:rotateY(90deg) translateZ(29px)}
  .vcf[data-view=left]{transform:rotateY(-90deg) translateZ(29px)}
  .vcf[data-view=top]{transform:rotateX(90deg) translateZ(29px)}
  .vcf[data-view=bottom]{transform:rotateX(-90deg) translateZ(29px)}
  #vcViews{display:flex;gap:4px}
  #vcViews button{font-size:10px;padding:3px 7px;border:1px solid var(--line-2);background:rgba(35,39,47,.85);color:var(--ink-soft);border-radius:5px;cursor:pointer}
  #vcViews button:hover{border-color:var(--accent);color:#cfe3ff}
  /* props */
  #propBody{flex:1;overflow:auto;padding:10px 12px}
  #propEmpty{color:var(--muted);font-size:12px;padding:6px 0;line-height:1.5}
  .prow{display:flex;align-items:center;gap:8px;margin:0 0 9px}
  .prow label{width:74px;color:var(--muted);font-size:11.5px;flex-shrink:0}
  .prow input[type=text],.prow input[type=number],.prow select{flex:1;min-width:0;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:6px;color:var(--ink);font:inherit;font-size:12px;padding:5px 7px}
  .prow input[type=color]{width:34px;height:28px;padding:1px;border:1px solid var(--line-2);border-radius:6px;background:var(--chrome-2)}
  .p3{display:flex;gap:5px;flex:1}
  .p3 input{width:100%;min-width:0;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:6px;color:var(--ink);font:inherit;font-size:12px;padding:5px 4px;text-align:center}
  .psec{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:14px 0 8px;padding-bottom:4px;border-bottom:1px solid var(--line)}
  .psec:first-child{margin-top:0}
  .pbtns{display:flex;gap:6px;margin-top:6px}
  .pbtn{flex:1;padding:6px;border:1px solid var(--line-2);background:var(--chrome-2);color:var(--ink-soft);border-radius:6px;font:inherit;font-size:11.5px;cursor:pointer}
  .pbtn:hover{border-color:var(--accent);color:#cfe3ff}
  .pbtn.danger:hover{border-color:var(--danger);color:#ffb4b4}
  /* status */
  #statusbar{display:flex;align-items:center;gap:14px;padding:5px 12px;background:var(--chrome);border-top:1px solid var(--line);font-size:11.5px;color:var(--muted)}
  /* feature-tijdlijn */
  #timeline{display:flex;align-items:center;gap:6px;height:46px;background:var(--chrome);border-top:1px solid var(--line);padding:0 10px;flex-shrink:0}
  #timeline .tl-lbl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);flex-shrink:0}
  .tl-nav{flex-shrink:0;width:24px;height:24px;border:1px solid var(--line-2);background:var(--chrome-2);color:var(--ink-soft);border-radius:5px;cursor:pointer;font-size:9px}
  .tl-nav:hover{border-color:var(--accent);color:#cfe3ff}
  #tlInner{display:flex;align-items:center;gap:4px;overflow-x:auto;flex:1;min-width:0;height:100%;padding:0 2px;scrollbar-width:thin}
  #tlInner::-webkit-scrollbar{height:5px} #tlInner::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:3px}
  .tl-node{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:1px;min-width:44px;max-width:74px;padding:3px 5px;border:1px solid var(--line-2);border-radius:6px;background:var(--chrome-2);color:var(--ink-soft);cursor:pointer;font-size:9px}
  .tl-node:hover{border-color:var(--accent);color:#cfe3ff}
  .tl-node.sel{background:var(--accent-soft);border-color:var(--accent);color:#cfe3ff}
  .tl-node.rolled{opacity:.35}
  .tl-node .tl-nm{max-width:62px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .tl-node svg{width:16px;height:16px}
  #statusbar .msg{color:var(--ink-soft)}
  input[type=file]{display:none}
  @media (max-width:920px){ #browser,#props{width:180px} }
  @media (max-width:680px){ #browser{display:none} #props{width:160px} }