:root{color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}html{scroll-padding-top:env(safe-area-inset-top,0px)}body{margin:0;padding:0;font:14px -apple-system,BlinkMacSystemFont,sans-serif;background:#faf9f5;color:#141413}img{max-width:100%}[hidden]:not([hidden=until-found i]){display:none!important}
/* Layout: drafting table — library | cyanotype 3D sheet | block inspector; one column on narrow screens with block info right under the 3D view */
:root{
  --paper:#edf1f5; --panel:#fbfcfd; --ink:#132339; --muted:#5a6a80; --line:#cdd6e2;
  --accent:#e2681a; --accent-ink:#ffffff; --chip:#e3e9f1;
  --sheet:#0d3260; --sheet-ink:#d9e8ff; --sheet-line:#2f5f96; --pop:#fbfcfd;
  --f-display:'Russo One','Arial Black',system-ui,sans-serif;
  --f-body:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --f-mono:'IBM Plex Mono',ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0a111d; --panel:#101a2a; --ink:#e2e9f3; --muted:#8e9db3; --line:#22314a;
  --accent:#ff8f3a; --accent-ink:#1a0d02; --chip:#18253a;
  --sheet:#0b2c55; --sheet-ink:#d9e8ff; --sheet-line:#2a568b; --pop:#101a2a; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0a111d; --panel:#101a2a; --ink:#e2e9f3; --muted:#8e9db3; --line:#22314a;
  --accent:#ff8f3a; --accent-ink:#1a0d02; --chip:#18253a;
  --sheet:#0b2c55; --sheet-ink:#d9e8ff; --sheet-line:#2a568b; --pop:#101a2a; color-scheme:dark}

[hidden]{display:none!important}
body{background:var(--paper);color:var(--ink);font:15px/1.5 var(--f-body);padding-inline:16px;padding-block:0 28px}
*{box-sizing:border-box}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button,select,input{font:inherit;color:inherit}

header{max-width:1500px;margin:0 auto;padding-block:20px 16px}
header .top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
h1 a{color:inherit;text-decoration:none}
.lang{flex:none;font:600 13px var(--f-body);color:var(--ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:5px 13px;background:var(--panel)}
.lang:hover{border-color:var(--accent)}
h1{font-family:var(--f-display);font-weight:400;font-size:clamp(22px,3vw,30px);margin:0;letter-spacing:.01em;text-wrap:balance}
h1 span{color:var(--accent)}
.sub{color:var(--muted);margin:0;max-width:66ch}

.app{display:grid;grid-template-columns:290px minmax(0,1fr) 330px;gap:16px;max-width:1500px;margin:0 auto;align-items:start}
.col{display:grid;gap:16px;min-width:0}
.right{position:sticky;top:calc(env(safe-area-inset-top,0px) + 12px)}
.side{max-height:calc(100vh - 24px);overflow:auto}
@media (max-width:1180px){.side{max-height:none}}
.tabs{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:12px;border-bottom:1px solid var(--line);padding-bottom:8px}
.tab{border:1px solid transparent;background:transparent;border-radius:7px;padding:5px 10px;font-size:13px;font-weight:600;cursor:pointer;color:var(--muted)}
.tab:hover{color:var(--ink)}
.tab[aria-selected="true"]{background:var(--ink);color:var(--panel)}
.search{width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font-size:14px;margin:4px 0 10px}
.cat h3{font:500 11.5px/1.2 var(--f-mono);text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin:14px 0 6px}
.cgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:5px}
.ci{display:grid;grid-template-columns:16px minmax(0,1fr);gap:7px;align-items:center;text-align:left;border:1px solid var(--line);background:transparent;border-radius:7px;padding:6px 8px;font-size:12.5px;line-height:1.25;cursor:pointer}
.ci:hover{border-color:var(--accent)}
.ci i{width:16px;height:16px;border-radius:4px;border:1px solid var(--line)}
.prog{height:8px;border-radius:99px;background:var(--chip);overflow:hidden;margin:6px 0 12px}
.prog i{display:block;height:100%;background:#2fb36b}
.bg{border-bottom:1px solid var(--line)}
.bg summary{display:grid;grid-template-columns:18px minmax(0,1fr) auto;gap:8px;align-items:center;padding:7px 0;cursor:pointer;font-size:13.5px}
.bg summary::-webkit-details-marker{display:none}
.bg summary .n{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.bg summary .nm::before{content:'▸ ';color:var(--muted)}
.bg[open] summary .nm::before{content:'▾ '}
.vr{display:grid;grid-template-columns:auto 14px minmax(0,1fr) auto;gap:8px;align-items:center;padding:4px 0 4px 6px;font-size:12.5px;cursor:pointer}
.vr .sz{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.vr .hx{color:var(--muted);font-family:var(--f-mono);font-size:11px;margin-left:6px}
.vr b{font-family:var(--f-mono);font-weight:500}
.vr.done{opacity:.5}.vr.done .sz{text-decoration:line-through}
.vr i{width:14px;height:14px;border-radius:3px;border:1px solid var(--line)}
.more-v{font-size:12px;color:var(--muted);padding:4px 0 8px 6px}
.sigline{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;margin:0 0 10px}
.sigline i{width:10px;height:10px;border-radius:50%;background:#7a7f88}
.sigline.on i{background:#2fb36b;box-shadow:0 0 6px #2fb36b}

.btn.sim[aria-pressed="true"]{background:#2fb36b;color:#06210f;border-color:#1f8a4f}
.mode-sel{padding:5px 8px;border:1px solid var(--line);border-radius:6px;background:var(--panel);font:13px var(--f-mono)}
@media (max-width:1180px){
  .app{display:flex;flex-direction:column}
  .col{display:contents}
  .center>*{order:1} #side{order:2} #listPanel{order:0} #genPanel{order:4}
  .app>*,.col>*{width:100%}
}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px;min-width:0}
h2{font:500 11.5px/1.2 var(--f-mono);text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin:0 0 10px}
h2.grp{margin-top:14px}

.bp-list{display:grid;gap:6px}
.bp{position:relative;display:grid;grid-template-columns:auto 1fr;gap:2px 10px;align-items:center;width:100%;text-align:left;
  background:transparent;border:1px solid var(--line);border-radius:8px;padding:9px 10px;cursor:pointer}
a.bp{color:inherit;text-decoration:none}
.bp:hover{border-color:var(--muted)}
.bp[aria-current="true"]{background:var(--ink);color:var(--panel);border-color:var(--ink)}
.bp .kind{grid-row:1/3;font:500 10px/1 var(--f-mono);text-transform:uppercase;letter-spacing:.06em;border:1px solid currentColor;border-radius:4px;padding:5px;min-width:72px;text-align:center;opacity:.8}
.bp .nm{font-weight:600;line-height:1.25;padding-right:18px}
.bp .meta{font:12px var(--f-mono);opacity:.7}
.bp .del{position:absolute;top:6px;right:6px;cursor:pointer;opacity:.6;padding:2px 6px;border-radius:4px;font-size:14px}
.bp .del:hover{opacity:1;background:var(--chip);color:var(--ink)}

.drop{position:relative;display:grid;place-items:center;text-align:center;gap:4px;border:1.5px dashed var(--muted);border-radius:8px;padding:16px 10px;cursor:pointer;color:var(--muted);font-size:13.5px}
.drop b{color:var(--ink);font-weight:600}
.drop.over{border-color:var(--accent);color:var(--ink);background:var(--chip)}
.drop input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.form{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 10px;align-items:center;margin-top:12px;font-size:13.5px}
.form select{width:100%;padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}
.check{display:flex;gap:8px;align-items:center;font-size:13.5px;margin-top:8px}
.row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.btn{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:7px 12px;font-size:13.5px;cursor:pointer;line-height:1.2}
.btn:hover{border-color:var(--muted)}
.btn[aria-pressed="true"]{background:var(--ink);color:var(--panel);border-color:var(--ink)}
.btn.tape[aria-pressed="true"]{background:#f2c230;color:#1c1606;border-color:#c99a10}
#prev{display:block;max-width:100%;image-rendering:pixelated;margin-top:12px;border-radius:6px;background:repeating-conic-gradient(var(--chip) 0 25%,transparent 0 50%) 0 0/12px 12px}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent;font-weight:600}
.btn:disabled{opacity:.45;cursor:not-allowed}
.pick{display:grid;grid-template-columns:56px minmax(0,1fr);gap:10px;align-items:center;margin-top:12px;font-size:13px}
.pick img{width:56px;height:56px;object-fit:cover;border-radius:6px;border:1px solid var(--line);background:var(--chip)}
.pick b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pick span{color:var(--muted)}
.ai-run{display:flex;align-items:center;gap:8px;margin-top:10px;font-size:13.5px}
.ai-run .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);animation:pulse 1s ease-in-out infinite}
@keyframes pulse{50%{opacity:.25}}
.opts{margin-top:12px;border-top:1px solid var(--line);padding-top:8px}
.opts summary{cursor:pointer;font-size:13.5px;font-weight:600}
.lbl{display:block;font-size:13px;color:var(--muted);margin-top:10px}
textarea{width:100%;margin-top:4px;padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--panel);font:13.5px var(--f-body);resize:vertical}
.note{font-size:12.5px;color:var(--muted);margin:8px 0 0}

.viewport{position:relative;height:clamp(400px,68vh,780px);background:var(--sheet);border-radius:10px;overflow:hidden;border:1px solid var(--line);touch-action:none}
.viewport canvas{display:block;width:100%;height:100%}
.hint{position:absolute;left:10px;bottom:10px;font:11.5px var(--f-mono);color:var(--sheet-ink);opacity:.75;pointer-events:none;max-width:45%}
.stamp{position:absolute;right:10px;bottom:10px;display:grid;grid-template-columns:auto auto;border:1.5px solid var(--sheet-ink);color:var(--sheet-ink);
  font:11px/1.25 var(--f-mono);background:color-mix(in srgb,var(--sheet) 82%,transparent);pointer-events:none;max-width:calc(100% - 20px)}
.stamp div{padding:4px 7px;border-bottom:1px solid var(--sheet-line);font-variant-numeric:tabular-nums}
.stamp div:nth-child(odd){border-right:1px solid var(--sheet-line);opacity:.7;text-transform:uppercase;letter-spacing:.06em}
.stamp div:nth-last-child(-n+2){border-bottom:0}
.stamp .big{font-family:var(--f-display);font-size:13px;letter-spacing:.02em;text-transform:none;opacity:1}
.busy{position:absolute;inset:0;display:grid;place-items:center;background:color-mix(in srgb,var(--sheet) 70%,transparent);color:var(--sheet-ink);font:600 15px var(--f-body)}
.err{position:absolute;inset:0;display:grid;place-items:center;color:var(--sheet-ink);padding:20px;text-align:center}

/* block info on top of the 3D view */
.pop{position:absolute;left:10px;top:10px;width:min(320px,calc(100% - 20px));background:var(--pop);color:var(--ink);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;box-shadow:0 8px 24px rgba(0,10,30,.35);font-size:13px}
.pop .ph{display:grid;grid-template-columns:30px 1fr auto;gap:9px;align-items:center}
.pop .ph .sw{width:30px;height:30px}
.pop b{font-size:14.5px;line-height:1.2;display:block}
.pop small{font:11.5px var(--f-mono);color:var(--muted)}
.pop .x{border:0;background:var(--chip);border-radius:6px;width:28px;height:28px;cursor:pointer;font-size:15px;line-height:1}
.pop dl{display:grid;grid-template-columns:auto 1fr;gap:3px 10px;margin:9px 0 0}
.pop dt{color:var(--muted)} .pop dd{margin:0;font-family:var(--f-mono);min-width:0;overflow-wrap:anywhere}
.pop{max-height:calc(100% - 20px);max-width:calc(100% - 20px);overflow:hidden;display:flex;flex-direction:column;min-width:210px;padding-bottom:6px}
.pop:not([hidden]){display:flex}
.pop .ph{grid-template-columns:30px 1fr auto auto auto;gap:6px;cursor:move;touch-action:none;user-select:none;flex:none;padding-bottom:2px}
.pop .ph>div{min-width:0}
.pop.dragging{opacity:.92;box-shadow:0 14px 34px rgba(0,10,30,.45)}
.pop .pb{flex:1 1 auto;min-height:0;overflow:auto;margin:0 -12px;padding:0 12px 6px;overscroll-behavior:contain}
.pop.min .pb,.pop.min .grip{display:none}
.pop.min{height:auto!important;padding-bottom:10px}
.pop .tb{border:0;background:var(--chip);color:var(--ink);border-radius:6px;min-width:28px;height:28px;cursor:pointer;font:600 12px var(--f-mono);padding:0 6px}
.pop .tb:hover,.pop .x:hover{background:var(--line)}
.pop .grip{position:absolute;right:2px;bottom:2px;width:20px;height:20px;cursor:nwse-resize;touch-action:none;border-radius:0 0 8px 0;
  background:linear-gradient(135deg,transparent 0 45%,var(--muted) 45% 52%,transparent 52% 64%,var(--muted) 64% 71%,transparent 71% 83%,var(--muted) 83% 90%,transparent 90%);opacity:.7}
.pop .grip:hover{opacity:1}
.pop.s{font-size:12px}.pop.s b{font-size:13px}.pop.s .cchip{font-size:11px;padding:1px 6px}
.pop.l{font-size:14.5px}.pop.l b{font-size:16px}.pop.l .cchip{font-size:13.5px;padding:3px 10px}
.cmore{border:0;background:none;color:var(--accent);font-weight:600;cursor:pointer;padding:2px 4px}
.cttl{cursor:pointer;user-select:none}.cttl .ar{margin-left:auto;font-size:10px;transition:transform .15s}.cgrp.shut .ar{transform:rotate(-90deg)}.cgrp.shut .cl{display:none}
.conn{margin-top:9px;padding:8px;border-radius:8px;background:var(--chip)}
.cth{display:flex;align-items:center;gap:6px;font-weight:600;font-size:12.5px;margin-bottom:4px}
.cth svg{width:15px;height:15px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.cgrp{margin-top:5px}
.cttl{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-bottom:3px}
.cttl i{width:10px;height:10px;border-radius:50%}
.cl{display:flex;flex-wrap:wrap;gap:4px}
.cchip{display:inline-flex;align-items:center;gap:5px;border:1.5px solid var(--cc);background:var(--panel);border-radius:99px;padding:2px 8px;font-size:12px;cursor:pointer;color:var(--ink)}
.cchip i{width:9px;height:9px;border-radius:2px;border:1px solid var(--line)}
.cchip:hover{background:var(--cc);color:#0b1a24}
.cmore{font-size:12px;align-self:center}
.chint{margin:6px 0 0;font-size:11.5px;color:var(--muted)}
.pop .more{margin-top:8px;border:0;background:none;color:var(--accent);padding:0;cursor:pointer;font-weight:600;font-size:13px}
.tape-out{position:absolute;transform:translate(-50%,-140%);background:#f2c230;color:#1c1606;font:600 12px var(--f-mono);padding:4px 8px;border-radius:6px;pointer-events:none;white-space:nowrap;box-shadow:0 2px 8px rgba(0,0,0,.35)}
.tape-hint{position:absolute;left:50%;top:10px;transform:translateX(-50%);background:#f2c230;color:#1c1606;font:600 12px var(--f-body);padding:5px 10px;border-radius:999px;pointer-events:none}
@media (max-width:560px){.tape-hint.sim-hint{top:10px;bottom:auto}}
.tape-hint.sim-hint{background:#2fb36b;color:#06210f}
@media (max-width:560px){.stamp{font-size:10px}.stamp div:nth-child(n+7){display:none}.hint{display:none}.pop{top:auto;bottom:10px;left:10px}.pop:not([hidden])+.stamp{display:none}.tape-hint{top:auto;bottom:10px}}

.console{margin-top:12px;border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--paper)}
.con-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px;margin-bottom:10px}
.con-head h2{margin:0}.con-head .note{margin:0;max-width:70ch}
.con-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:14px}
@media (max-width:720px){.con-grid{grid-template-columns:minmax(0,1fr)}}
.con-in,.con-out{display:grid;gap:10px;align-content:start;min-width:0}
.crow{display:grid;gap:6px}
.ct{display:flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600}
.ct i{width:12px;height:12px;border-radius:3px}
.ct .val{margin-left:auto;font:500 13px var(--f-mono);color:var(--muted)}
.bits{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.bit{min-width:38px;padding:6px 4px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font:500 12px var(--f-mono);cursor:pointer;font-variant-numeric:tabular-nums}
.bit[aria-pressed="true"]{color:#fff;border-color:transparent}
.numin{width:72px;padding:5px 6px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font:14px var(--f-mono)}
.opts2{display:flex;flex-wrap:wrap;gap:4px}
.opt{padding:6px 10px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font-size:12.5px;cursor:pointer}
.opt[aria-pressed="true"]{background:#8a4fd1;color:#fff;border-color:transparent}
.tgl{padding:7px 12px;border:1px solid var(--line);border-radius:7px;background:var(--panel);font-size:13px;cursor:pointer;text-align:left}
.tgl[aria-pressed="true"]{color:#fff;border-color:transparent}
.pressb{padding:9px 14px;border:0;border-radius:8px;color:#fff;font-weight:600;font-size:13.5px;cursor:pointer}
.pressb:active{transform:translateY(1px)}
.out{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 10px;align-items:baseline;padding:8px 10px;border-radius:8px;background:var(--panel);border:1px solid var(--line)}
.out span{font-size:13px;color:var(--muted)}
.out b{font:600 18px var(--f-mono);font-variant-numeric:tabular-nums}
.out b.big{font-size:30px;color:var(--accent)}
.out small{grid-column:1/-1;font:11.5px var(--f-mono);color:var(--muted);overflow-wrap:anywhere}
.lrow{display:flex;justify-content:space-between;gap:8px;font-size:13px;padding:3px 0;border-bottom:1px solid var(--line)}
.chip2{font:600 12px var(--f-mono);padding:1px 8px;border-radius:99px;background:var(--chip);color:var(--muted)}
.chip2.on{background:#2fb36b;color:#fff}
.caption{margin:10px 2px 0;color:var(--muted);font-size:13.5px}
.toolbar{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;margin-top:12px}
.rng{display:grid;gap:2px;font-size:12.5px;color:var(--muted);min-width:170px;flex:1 1 170px}
.rng span{display:flex;justify-content:space-between;gap:8px}
.rng output{font-family:var(--f-mono);color:var(--ink);font-variant-numeric:tabular-nums}
.rng input{width:100%;accent-color:var(--accent)}
.tg{display:flex;flex-wrap:wrap;gap:6px}

.ins-empty p{margin:0 0 12px;color:var(--muted)}
.legend{display:grid;gap:10px}
.legend div{display:grid;grid-template-columns:28px 1fr;gap:8px;align-items:start;font-size:13.5px}
.ico{width:28px;height:28px;display:grid;place-items:center;border-radius:6px;background:var(--chip)}
.ico svg{width:17px;height:17px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.ins-head{display:grid;grid-template-columns:38px 1fr;gap:10px;align-items:center;margin-bottom:10px}
.sw{width:38px;height:38px;border-radius:7px;border:1px solid var(--line);display:block}
.sw.s{width:18px;height:18px;border-radius:4px;display:inline-block;vertical-align:-4px}
.ins-head h3{margin:0;font-size:16px;line-height:1.25;text-wrap:balance}
.ins-head small{font:12px var(--f-mono);color:var(--muted)}
dl.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;margin:0;font-size:13.5px}
dl.kv dt{color:var(--muted)}
dl.kv dd{margin:0;font-family:var(--f-mono);font-variant-numeric:tabular-nums;min-width:0;overflow-wrap:anywhere}
.tool{border-top:1px solid var(--line);padding-top:12px;margin-top:12px;display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px}
.tool h4{margin:3px 0 6px;font-size:14px}
.tool p{margin:0;font-size:13px;color:var(--muted)}
.links{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 6px}
.lk{border:1px solid var(--accent);color:var(--ink);background:transparent;border-radius:999px;padding:3px 10px;font-size:12.5px;cursor:pointer}
.lk:hover{background:var(--accent);color:var(--accent-ink)}
.paint{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.paint input[type=color]{width:38px;height:30px;border:1px solid var(--line);border-radius:6px;padding:0;background:none;cursor:pointer}
.hex{font-family:var(--f-mono)}
.mini{border:1px solid var(--line);background:transparent;border-radius:5px;padding:2px 8px;font-size:12px;cursor:pointer;color:var(--muted)}
.mini:hover{border-color:var(--muted);color:var(--ink)}
.size{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin:2px 0 6px}
.size label{display:grid;gap:2px;font:11px var(--f-mono);color:var(--muted);text-transform:uppercase}
.size input{width:100%;min-width:0;padding:5px 6px;border:1px solid var(--line);border-radius:6px;background:var(--panel);font:13px var(--f-mono)}
.desc{margin:12px 0 0;font-size:13.5px}

.bom{display:grid;gap:4px;font-size:13.5px}
.bom .it{display:grid;grid-template-columns:18px minmax(0,1fr) auto;gap:8px;align-items:center;padding:4px 0;border-bottom:1px solid var(--line)}
.bom .it:last-child{border-bottom:0}
.bom .n{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.chips{display:flex;flex-wrap:wrap;gap:3px;margin-top:3px}
.chips i{width:12px;height:12px;border-radius:3px;border:1px solid var(--line)}
.tot{display:flex;justify-content:space-between;font:500 13px var(--f-mono);margin-bottom:8px}

footer{max-width:1500px;margin:20px auto 0;color:var(--muted);font-size:12.5px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* phones and tablets — kept last so these win over the base rules above */
@media (max-width:1180px){
  /* one column: the blueprints become a swipeable row above the 3D view instead of a long list below it */
  #listPanel{padding:12px 0 10px 12px}
  .bp-list{display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x proximity;overscroll-behavior-x:contain;padding:2px 12px 8px 0;scrollbar-width:thin}
  .bp-list .grp{display:none}
  .bp{flex:0 0 205px;scroll-snap-align:start}
}
@media (max-width:720px){
  /* leave room around the 3D view so a finger can still scroll the page */
  .viewport{height:clamp(300px,56vh,520px)}
  .sub{font-size:13.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
}