/* ============================================================
   Breadbit — application styles (dark default, light via html[data-theme=light])
   ============================================================ */
:root{--bad:#ff5b52;--plastic1:#1d293c;--plastic2:#0f1622}  /* only the tokens no later layer defines; every other theme token lives in premium.css / skins.css / ds.css */
html[data-theme=light]{--plastic1:#f4f1e8;--plastic2:#e1dccb}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{touch-action:manipulation;margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--text);font:14px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif;touch-action:manipulation;overscroll-behavior:none}
button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--line);background:var(--panel2);border-radius:10px;padding:8px 12px}
button:disabled{opacity:.35;cursor:default}
input,select{font:inherit;color:var(--text)}
#app{display:flex;flex-direction:column;height:100vh;height:100dvh;position:relative}
/* header */
#app header{display:flex;align-items:center;gap:10px;padding:8px 12px;padding-top:max(8px,env(safe-area-inset-top));background:var(--panel);border-bottom:1px solid var(--line);flex-shrink:0;z-index:5}
#brand{margin:0;font-size:17px;font-weight:800;letter-spacing:.3px;display:flex;align-items:center;gap:9px;white-space:nowrap;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
#brand .logo{width:30px;height:30px;border-radius:9px;background:none;box-shadow:none}
header .status{flex:1;display:flex;gap:10px;justify-content:flex-end;font:600 11.5px ui-monospace,Menlo,monospace;color:var(--sub);white-space:nowrap}
header .status #simSpeed{color:var(--accent2)}
#hbtns{display:flex;gap:5px}
#hbtns button{width:36px;height:36px;padding:0;display:grid;place-items:center;border-radius:11px;position:relative}
#hbtns b{position:absolute;top:-4px;right:-4px;background:var(--bad);color:#fff;border-radius:9px;font-size:10px;min-width:16px;padding:0 4px;line-height:16px}
#warnBtn.hasWarn{border-color:var(--bad);color:var(--bad)}
@media(max-width:560px){#hbtns button{width:32px;height:32px}#hbtns{gap:3px}header .status{display:none}#brand{font-size:15px;flex:1}}
/* stage */
#stage{flex:1;position:relative;overflow:hidden;min-height:0;background:radial-gradient(ellipse at 50% 0%,var(--panel3) 0%,var(--bg) 78%)}
#stage::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:36px 36px;opacity:.22}
#svgWrap{position:absolute;inset:0}
#board{width:100%;height:100%;display:block;touch-action:none;user-select:none;-webkit-user-select:none}
#hud{white-space:nowrap;position:absolute;left:10px;top:10px;background:color-mix(in srgb,var(--panel) 88%,transparent);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:12px;padding:6px 11px;font-size:11.5px;pointer-events:none;box-shadow:var(--shadow);max-width:60vw}
.hudRow{display:flex;gap:8px;justify-content:space-between;color:var(--sub)}.hudRow b{color:var(--accent)}
#hintBar{position:absolute;left:50%;transform:translateX(-50%);top:10px;display:flex;align-items:center;gap:8px;max-width:calc(100% - 150px)}
#hint{background:color-mix(in srgb,var(--panel) 90%,transparent);border:1px solid var(--line);border-radius:20px;padding:5px 13px;font-size:11.5px;color:var(--sub);text-align:center}
#curTool{border-radius:20px;padding:4px 11px;background:var(--accent);color:#1a1205;border:0;font-weight:700;font-size:12px}
#zoomCtl{position:absolute;right:10px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:6px}
#zoomCtl button{width:38px;height:38px;padding:0;display:grid;place-items:center;background:color-mix(in srgb,var(--panel) 90%,transparent);border-radius:12px;box-shadow:var(--shadow)}
#speedRow{position:absolute;left:10px;bottom:10px;display:flex;align-items:center;gap:2px;background:color-mix(in srgb,var(--panel) 90%,transparent);border:1px solid var(--line);border-radius:12px;padding:3px;box-shadow:var(--shadow);z-index:3}
#speedRow .ic{width:15px;height:15px;margin:0 4px;color:var(--sub)}
#speedRow button{border:0;background:none;padding:5px 7px;font-size:11px;border-radius:9px;color:var(--sub)}
#speedRow button.active{background:var(--accent2);color:#04141a;font-weight:700}
#toast{position:absolute;left:50%;top:52px;transform:translate(-50%,-14px);background:var(--panel);border:1px solid var(--accent2);color:var(--text);padding:8px 16px;border-radius:14px;font-size:13px;opacity:0;pointer-events:none;transition:.22s;z-index:30;max-width:92%;text-align:center;box-shadow:var(--shadow)}
#toast.show{opacity:1;transform:translate(-50%,0)}#toast.warn{border-color:var(--bad)}
/* toolbar */
#toolbar{display:flex;gap:3px;padding:6px 6px;padding-bottom:max(6px,env(safe-area-inset-bottom));background:var(--panel);border-top:1px solid var(--line);overflow-x:auto;flex-shrink:0;z-index:5;scrollbar-width:none}
#toolbar::-webkit-scrollbar{display:none}
#toolbar button{flex:1 0 auto;min-width:46px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 4px;border:1px solid transparent;background:none;border-radius:12px;font-size:10.5px;color:var(--sub);font-weight:600}
#toolbar button .ic{width:23px;height:23px;color:var(--text)}
#toolbar button.active{background:color-mix(in srgb,var(--accent) 16%,transparent);border-color:var(--accent);color:var(--accent)}
#toolbar button.active .ic{color:var(--accent)}
#toolbar button.pri{background:linear-gradient(135deg,var(--accent),#ff7a3d);color:#1a1205}
#toolbar button.pri .ic{color:#1a1205;--ic2:#1a1205}
#toolbar button.locked,.locked{opacity:.4}
#toolbar button#runBtn .ic{fill:currentColor}
/* sheet */
#sheet{position:absolute;left:0;right:0;bottom:0;max-height:62%;background:var(--panel);border-top:2px solid var(--accent2);border-radius:20px 20px 0 0;box-shadow:0 -12px 40px rgba(0,0,0,.45);transform:translateY(105%);transition:transform .28s cubic-bezier(.2,.8,.2,1);z-index:20;display:flex;flex-direction:column}
#sheet.show{transform:none}#sheet.tall{max-height:84%}
@media(min-width:900px){#sheet{left:auto;width:460px;right:12px;bottom:12px;border-radius:20px;border:1px solid var(--line);border-top:2px solid var(--accent2);max-height:78%}}
#sheetHead{display:flex;align-items:center;justify-content:space-between;padding:12px 16px 8px;font-size:16px}
#sheetHead button{border:0;background:var(--panel2);width:34px;height:34px;padding:0;display:grid;place-items:center;border-radius:50%}
#sheetBody{overflow:auto;padding:4px 14px 20px;-webkit-overflow-scrolling:touch}
.searchRow input{width:100%;padding:11px 14px;border-radius:12px;border:1px solid var(--line);background:var(--panel2)}
.chips{display:flex;gap:6px;overflow-x:auto;padding:10px 0;scrollbar-width:none}.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;border-radius:20px;padding:5px 13px;font-size:12px;background:var(--panel2)}.chip.on{background:var(--accent2);color:#04141a;border-color:var(--accent2);font-weight:700}
.subHead{font-size:11px;letter-spacing:.8px;text-transform:uppercase;color:var(--accent);margin:14px 2px 6px;font-weight:800}
.card{display:flex;align-items:center;gap:11px;padding:9px 10px;border:1px solid var(--line);background:var(--panel2);border-radius:14px;margin:6px 0;cursor:pointer}
.card:active{transform:scale(.985);border-color:var(--accent2)}.card.locked{opacity:.45}
.cardIc{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--panel3);flex-shrink:0}.cardIc .ic{width:22px;height:22px;color:var(--accent2)}
.cardTx{flex:1;min-width:0}.cardTx b{display:block;font-size:13.5px}.cardTx span{display:block;font-size:11.5px;color:var(--sub);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.mini{width:32px;height:32px;padding:0;display:grid;place-items:center;border-radius:50%;background:var(--panel3);flex-shrink:0}.mini .ic{width:16px;height:16px}
.empty{color:var(--sub);text-align:center;padding:24px 8px}
.big{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:13px;margin-top:14px;border:0;border-radius:14px;background:linear-gradient(135deg,var(--accent),#ff7a3d);color:#1a1205;font-weight:800;font-size:15px}.big.sm{width:auto;margin:0;padding:10px 16px}
.inBtns{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 2px}.inBtns button{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;min-width:90px}.danger{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 45%,var(--line))}
.saveRow{display:flex;gap:8px;margin:6px 0}.saveRow input{flex:1;padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--panel2)}
.tg{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 4px;border-bottom:1px solid var(--line)}.tg small{display:block;color:var(--sub);font-size:11.5px}.tg input{display:none}.tg i{width:44px;height:26px;border-radius:13px;background:var(--panel3);position:relative;flex-shrink:0;transition:.2s}.tg i::after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:.2s}.tg input:checked+i{background:var(--accent2)}.tg input:checked+i::after{left:21px}
.alert{display:flex;gap:10px;padding:10px 12px;border-radius:12px;margin:8px 0;font-size:13px;background:var(--panel2);border:1px solid var(--line)}.alert.bad{border-color:var(--bad)}.alert.warn{border-color:var(--accent)}.alert .ic{color:var(--bad)}
/* datasheet */
.ds h4{margin:16px 0 6px;font-size:12px;letter-spacing:.7px;text-transform:uppercase;color:var(--accent)}.dsDesc{margin:4px 0;color:var(--sub)}
.pinout{width:100%;max-width:420px;display:block;margin:0 auto}.pinout .pkg{fill:var(--panel3);stroke:var(--accent2);stroke-width:1.5}.pinout .notch{fill:none;stroke:var(--accent2)}.pinout .pl{stroke:var(--sub);stroke-width:2}.pinout .pt{fill:var(--text);font:600 11px ui-monospace,Menlo,monospace}.pinout .pn{fill:var(--accent);font:700 9px sans-serif}
.tt{overflow-x:auto}.tt table{border-collapse:collapse;font:12px ui-monospace,Menlo,monospace;margin:auto}.tt th,.tt td{border:1px solid var(--line);padding:3px 9px;text-align:center}.tt th{background:var(--panel3)}.tt .o{color:var(--good);font-weight:700}.tt th.o{color:var(--good)}
/* inspector */
#inspector{position:absolute;left:8px;right:8px;bottom:8px;max-height:56%;overflow:auto;background:color-mix(in srgb,var(--panel) 96%,transparent);backdrop-filter:blur(10px);border:1px solid var(--line);border-top:2px solid var(--accent);border-radius:18px;padding:12px;box-shadow:var(--shadow);transform:translateY(120%);transition:transform .25s;z-index:8}
#inspector.show{transform:none}
@media(min-width:900px){#inspector{left:auto;right:12px;width:380px;bottom:12px}}
.inHead{display:flex;align-items:center;gap:10px}.inIc{width:38px;height:38px;border-radius:11px;background:var(--panel3);display:grid;place-items:center;flex-shrink:0}.inIc .ic{color:var(--accent2)}.inTx{flex:1;min-width:0}.inTx b{display:block;font-size:14px}.inTx small{color:var(--sub);font-size:11px}
.inLive{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:10px 0}.inLive.bad{outline:1px solid var(--bad);border-radius:10px}
.lv{background:var(--panel2);border-radius:10px;padding:6px 10px;display:flex;justify-content:space-between;gap:8px;font-size:12.5px}.lv span{color:var(--sub)}.lv b{font-family:ui-monospace,Menlo,monospace;text-align:right}.lv.wide{grid-column:1/-1;flex-direction:column}.lv.wide b{text-align:left;font-family:inherit}
.pinChips{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.pinChip{font:600 10.5px ui-monospace,Menlo,monospace;padding:2px 7px;border-radius:7px;background:var(--panel3);color:var(--sub)}.pinChip.hi{background:#134e32;color:#7dffb7}.pinChip.lo{background:#25314a}.pinChip.o{outline:1px dashed var(--accent2)}
.pRow{margin:10px 0}.pRow label{display:block;font-size:11.5px;color:var(--sub);margin-bottom:4px}
.seg{display:flex;flex-wrap:wrap;gap:5px}.seg button{padding:5px 11px;font-size:12px;border-radius:9px}.seg button.on{background:var(--accent);color:#1a1205;border-color:var(--accent);font-weight:700}
.step{display:flex;align-items:center;gap:8px}.step button{width:44px}.stepV{flex:1;text-align:center;font:700 17px ui-monospace,Menlo,monospace;color:var(--accent2)}
input[type=range]{width:100%;accent-color:var(--accent2);height:30px}.rg{display:flex;align-items:center;gap:10px}.rgV{min-width:70px;text-align:right;font:700 13px ui-monospace,Menlo,monospace;color:var(--accent2)}
/* board art */
.plastic{fill:var(--plastic1);stroke:var(--line);stroke-width:1.5;filter:drop-shadow(0 8px 18px rgba(0,0,0,.45))}.gap{fill:var(--plastic2)}
.railBg{fill:#00000026}.railBus{stroke-width:2.4;stroke-linecap:round;opacity:.45}.railBus.blue{stroke:#4a8bff}.railBus.red{stroke:#ff5b52}.railBus.live{opacity:1;filter:drop-shadow(0 0 4px currentColor)}
.railSign{font:800 14px sans-serif}.railSign.blue{fill:#4a8bff}.railSign.red{fill:#ff5b52}
.lblRow,.lblCol{fill:var(--sub);font:600 9px sans-serif;text-anchor:middle}
.hole{fill:#04070d;transition:fill .12s}html[data-theme=light] .hole{fill:#2a2f3a}.holeRing{fill:none;stroke:#8a7b52;stroke-width:1}
.holeHit{fill:transparent;cursor:pointer}.holeHit:hover{fill:#22d3ee22}
.pendRing{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-dasharray:4 3;animation:spin 1.2s linear infinite;transform-box:fill-box;transform-origin:center}
@keyframes spin{to{stroke-dashoffset:-14}}
.selRing{fill:none;stroke:var(--accent2);stroke-width:2.4;filter:drop-shadow(0 0 4px var(--accent2))}
.leg{stroke:#cfd6e4;stroke-width:2.6;stroke-linecap:round}.leg.dead{stroke:#444}.pin{fill:#e8edf6;stroke:#00000066}
.flow{stroke:#7df9ff;stroke-width:3.4;stroke-dasharray:1 9;stroke-linecap:round;opacity:0;pointer-events:none;filter:drop-shadow(0 0 3px #22d3ee)}.noflow .flow{display:none}
.wireShadow{fill:none;stroke:#0007;stroke-width:8;stroke-linecap:round;transform:translate(0,3px)}.wireBody{fill:none;stroke-width:5.5;stroke-linecap:round}.wireHi{fill:none;stroke:#ffffff44;stroke-width:1.6;stroke-linecap:round;transform:translate(0,-1.3px)}.wireHit{fill:none;stroke:transparent;stroke-width:16;pointer-events:none}
.bodyHit{fill:transparent;pointer-events:none}.tool-select .bodyHit,.tool-delete .bodyHit{pointer-events:all;cursor:pointer}.tool-select .wireHit,.tool-delete .wireHit{pointer-events:stroke}.tool-delete .bodyHit:hover{fill:#ff5b5233}
.part.dead{filter:grayscale(1) brightness(.55)}.part .dead{filter:grayscale(1) brightness(.55)}
.pl,.plb,.plt,.plv{font:700 8.5px sans-serif;fill:var(--sub)}.plt{fill:#e8eefb}.plt.dark{fill:#1a1205}.plt.bold{font-size:9.5px}.tiny{font-size:7px}.plb.red{fill:#ff8a80}.plb.dark{fill:#222}
.plv{font-size:9px;fill:var(--text);text-anchor:middle;paint-order:stroke;stroke:var(--bg);stroke-width:2.5px}.nolabels .plv{display:none}
.icName{font:800 10px ui-monospace,Menlo,monospace;fill:#cfd8ea;text-anchor:middle}.pinNo{font:700 6.5px sans-serif;fill:#8fa3c7;text-anchor:middle}.pinDot{stroke:#0006}
.gndSym{fill:none;stroke:var(--text);stroke-width:2}.lever{transition:.12s}
.seg.on{stroke:#ff3b30;filter:drop-shadow(0 0 4px #ff3b30)}.part .seg{stroke:#2a1010;stroke-width:3.4;stroke-linecap:round}.segdp{fill:#2a1010}.segdp.on{fill:#ff3b30}
/* dock (scope / meter) */
#dock{position:absolute;left:8px;right:8px;bottom:8px;background:color-mix(in srgb,var(--panel) 97%,transparent);border:1px solid var(--line);border-top:2px solid var(--accent2);border-radius:16px;box-shadow:var(--shadow);display:none;z-index:9;max-height:72%;overflow:auto}
#dock.show{display:block}
@media(min-width:900px){#dock{left:auto;width:520px;right:12px;bottom:12px}}
.dkHead{display:flex;align-items:center;gap:6px;padding:8px 10px;border-bottom:1px solid var(--line);position:sticky;top:0;background:inherit;z-index:2}.dkHead b{flex:1}.dkTabs{display:flex;gap:4px}.dkTabs button{padding:4px 10px;font-size:12px}.dkTabs button.on{background:var(--accent2);color:#04141a;border-color:var(--accent2);font-weight:700}
.scopeCv{display:block;width:100%;height:auto;background:#05120d;border-radius:10px;margin:8px 0;touch-action:none}
.ctlGrid{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;padding:0 10px 10px}.ctl{background:var(--panel2);border-radius:10px;padding:6px 8px;font-size:11.5px}.ctl label{color:var(--sub);display:block;margin-bottom:3px}.ctl .row{display:flex;align-items:center;gap:4px}.ctl .row button{padding:3px 9px}.ctl .row b{flex:1;text-align:center;font:700 13px ui-monospace,Menlo,monospace;color:var(--accent2)}
.ch1{color:#ffe14d}.ch2{color:#4de1ff}.meas{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;padding:0 10px 8px}.meas div{background:var(--panel2);border-radius:9px;padding:4px 8px;font:11px ui-monospace,Menlo,monospace}.meas span{color:var(--sub);display:block;font-size:9.5px}
.probeBtns{display:flex;gap:6px;flex-wrap:wrap;padding:0 10px 10px}.probeBtns button{font-size:12px;padding:5px 10px}
.lcd{margin:10px;padding:14px 16px;border-radius:12px;background:#a9c27d;color:#1a2a0c;font:700 38px ui-monospace,Menlo,monospace;text-align:right;box-shadow:inset 0 3px 8px rgba(0,0,0,.35);letter-spacing:1px}.lcd small{font-size:15px;margin-left:6px}.lcdSub{font:600 11px sans-serif;text-align:left;display:block;color:#3b5016}
.mModes{display:flex;gap:5px;flex-wrap:wrap;padding:0 10px}.mModes button{padding:6px 11px;font-size:12px}.mModes button.on{background:var(--accent);color:#1a1205;border-color:var(--accent);font-weight:700}
.probeRow{display:flex;gap:8px;padding:10px}.probeRow button{flex:1;display:flex;gap:6px;align-items:center;justify-content:center}.pr.red{border-color:#ff5b52;color:#ff8a80}.pr.blk{border-color:#8ea3c7}
/* labs */
.labCard .cardIc{background:linear-gradient(135deg,var(--accent),#ff7a3d)}.labCard .cardIc .ic{color:#1a1205}
.diff{font-size:10px;padding:1px 7px;border-radius:8px;background:var(--panel3);color:var(--accent2);margin-left:6px;font-weight:700}
.labSec h4{margin:14px 0 4px;font-size:12px;text-transform:uppercase;letter-spacing:.7px;color:var(--accent)}.labSec p,.labSec li{color:var(--text);font-size:13px;margin:3px 0}.labSec ol{padding-left:20px}
#labGuide{position:absolute;left:8px;top:48px;width:min(300px,64vw);background:color-mix(in srgb,var(--panel) 95%,transparent);backdrop-filter:blur(8px);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:14px;padding:9px 12px;z-index:6;display:none;font-size:12px;box-shadow:var(--shadow);max-height:46%;overflow:auto}
#labGuide.show{display:block}#labGuide h5{margin:0 0 4px;font-size:13px;display:flex;justify-content:space-between;gap:6px}#labGuide ol{margin:4px 0;padding-left:18px}#labGuide li{margin:3px 0}
.chk{display:flex;gap:7px;align-items:flex-start;margin:4px 0}.chk i{flex:0 0 16px;height:16px;border-radius:50%;border:2px solid var(--sub);margin-top:1px}.chk.ok i{background:var(--good);border-color:var(--good)}.chk.bad i{border-color:var(--bad)}
.vOv{z-index:100}

/* ============================================================
   v4.2 UI polish — quick shelf, welcome card, layout fixes
   ============================================================ */
#brand{background:none;-webkit-background-clip:initial;background-clip:initial;color:var(--text);font-size:18px;letter-spacing:.2px}
#brand .logo{box-shadow:0 2px 8px rgba(0,0,0,.25)}
/* hidden panels must not peek out on desktop */
#sheet:not(.show){visibility:hidden;transition:transform .28s cubic-bezier(.2,.8,.2,1),visibility 0s .28s}
#inspector:not(.show){visibility:hidden}
/* quick parts shelf */
#quick{display:flex;gap:6px;padding:7px 8px;background:var(--panel);border-top:1px solid var(--line);overflow-x:auto;flex-shrink:0;scrollbar-width:none;z-index:5;-webkit-overflow-scrolling:touch}
#quick::-webkit-scrollbar{display:none}
.qp{flex:0 0 auto;display:flex;align-items:center;gap:7px;padding:7px 12px 7px 9px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);font-size:12.5px;font-weight:600;white-space:nowrap}
.qp .ic{width:20px;height:20px;color:var(--accent2)}
.qp:active{transform:scale(.96)}
.qp.on{background:var(--accent);border-color:var(--accent);color:#1a1205}.qp.on .ic{color:#1a1205;--ic2:#1a1205}
.qp.more{background:none;border-style:dashed;color:var(--sub)}
.qp.locked{opacity:.4}
@media(min-width:900px){#quick{justify-content:center;padding:8px 12px}}
@media(max-height:520px){#quick{display:none}}
/* main toolbar: fits any phone width, tidy on desktop */
#toolbar{border-top:1px solid var(--line);gap:2px}
#toolbar button{flex:1 1 0;min-width:0;padding:6px 2px;font-size:10px}
@media(min-width:900px){#toolbar{justify-content:center}#toolbar button{flex:0 0 76px;font-size:11px}}
#toolbar button#runBtn.active{background:color-mix(in srgb,var(--good) 18%,transparent);border-color:var(--good);color:var(--good)}
#toolbar button#runBtn.active .ic{color:var(--good)}
/* header: real labels, no run-time clutter on phones */
#hbtns button:hover{border-color:var(--accent2)}
/* lab difficulty badge */
.cardTx b .diff{display:inline-block;vertical-align:1px}
.cardTx b{display:flex;align-items:center;flex-wrap:wrap;gap:4px 6px}.cardTx b .diff{margin-left:0}
/* welcome card */
#welcome{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);width:min(92%,380px);background:var(--panel);border:1px solid var(--line);border-top:2px solid var(--accent);border-radius:18px;padding:16px 18px 16px;box-shadow:var(--shadow);z-index:12}
#welcome[hidden]{display:none}
#welcome h2{margin:0 0 8px;font-size:17px}
#welcome ol{margin:0 0 12px;padding-left:20px;color:var(--sub);font-size:13px;line-height:1.6}#welcome li b{color:var(--text)}
#welcome .wBtns{display:flex;gap:8px;flex-wrap:wrap}#welcome .wBtns button{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap}
#welcome .wClose{position:absolute;top:8px;right:8px;width:30px;height:30px;padding:0;display:grid;place-items:center;border:0;background:none;color:var(--sub)}
@media(max-height:520px){#welcome{display:none}}