:root{--ink:#173932;--muted:#587267;--line:#dbe4d5;--lime:#d7f88b;--paper:#f6f8f1}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.6 Arial,sans-serif}button,input,select,textarea{font:inherit}button,select,.file-button{cursor:pointer}button,.file-button{background:white;border:1px solid #c9d9bf;padding:10px 14px;border-radius:6px;color:var(--ink);min-height:43px;font-size:12px}button:hover{background:#eaf2df}button:disabled{opacity:.45;cursor:not-allowed}a{color:inherit}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,textarea:focus-visible{outline:3px solid #75a84d;outline-offset:3px}header{background:#0c2928;color:white;padding:18px 30px;display:flex;justify-content:space-between;align-items:center;gap:15px}.brand{display:flex;align-items:center;gap:15px;font-size:28px;text-decoration:none}.brand span{font-size:23px}.brand small{font-size:9px;color:#d7f88b}.board-badge{font:10px monospace;letter-spacing:1px;color:#bad4b6}header label{font-size:10px}header select{margin-left:8px;border-radius:5px;padding:8px;border:1px solid #547065;background:#153b31;color:white}main{max-width:1680px;margin:auto;padding:30px}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.eyebrow{font:10px monospace;letter-spacing:2px;color:#65884f}h1{font-weight:500;font-size:38px;letter-spacing:-1.5px;margin:8px 0}.intro p{margin:0;color:var(--muted)}.file-actions{display:flex;gap:8px;flex-wrap:wrap}.file-button input{display:none}.lab{display:grid;grid-template-columns:220px minmax(350px,1fr) minmax(290px,.8fr);gap:18px;align-items:start}.lab>aside,.canvas-panel,.code-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}h2{font-size:15px;font-weight:600;margin:0 0 13px}.lab>aside>p{font-size:11px;color:var(--muted)}#palette{display:grid;gap:7px;margin-bottom:24px}.palette-item{text-align:left;display:flex;justify-content:space-between;align-items:center;background:#eff5e6;border-color:#d7e5c9}.palette-item span:first-child{font-size:18px;margin-right:10px}.palette-item:active{cursor:grabbing}.lab>aside select{width:100%;padding:9px;border:1px solid var(--line);border-radius:5px;margin-bottom:8px}.assistant{border-top:1px solid var(--line);padding-top:22px;margin-top:24px}.badge{font:9px monospace;letter-spacing:.5px;color:#5f834c}.assistant h2{margin-top:12px}.assistant textarea{resize:vertical;width:100%;padding:10px;font-size:13px;border:1px solid var(--line);border-radius:5px}.assistant button{width:100%;margin-top:7px}.assistant p,.help{font-size:11px;line-height:1.8;color:var(--muted)}.panel-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.panel-head h2{margin:0}.panel-head>span{font-size:10px;color:var(--muted)}#drop-zone{margin-top:17px;padding:18px;border:1px dashed #bccfad;border-radius:9px;background-color:#f6f8f0;background-image:radial-gradient(#d6e0cd 1px,transparent 1px);background-size:14px 14px;min-height:200px}#drop-zone.drag-over{border:2px solid #789d41;background-color:#e5f0ce}.uno{max-width:390px;margin:auto;background:#247877;border-radius:9px;padding:10px 15px;color:#def8ee;border:2px solid #185d5b;box-shadow:0 5px 10px #102c3215}.pin-strip{font:8px/1.9 monospace;background:#163e3c;border-radius:3px;padding:4px 7px;word-spacing:4px;text-align:center}.board-face{height:112px;display:flex;justify-content:space-between;align-items:center;gap:15px}.board-face>div:nth-child(2){display:flex;flex-direction:column;align-items:center}.board-face span{font-size:38px;line-height:1}.board-face strong{font-size:22px;font-weight:500;letter-spacing:4px}.board-face small{font:6px monospace;margin-top:5px;letter-spacing:.7px}.usb{width:38px;height:45px;background:linear-gradient(90deg,#96b9b1,#e0ede7,#97b5ab);border-radius:3px}.chip{width:24px;height:60px;background:#173331;border:4px dashed #819c90}.component{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:8px;border:1px solid #ceddc1;border-radius:7px;background:white;padding:10px;margin-top:10px;font-size:12px}.component strong{font-weight:500}.component small{display:block;color:var(--muted);font:9px monospace}.component select{padding:6px;border:1px solid #d4dfcd;border-radius:4px;font-size:12px}.component button,.block button.small{padding:3px 7px;min-height:34px}.block-head{margin-top:25px}.block{border:1px solid #c1d9b3;border-left:5px solid #73a957;background:#f1f7e9;border-radius:7px;padding:12px;margin-top:11px;position:relative}.block-top{display:flex;align-items:center;gap:5px;justify-content:space-between;margin-bottom:8px}.block-top>span{font:9px monospace;color:#749064}.block label{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:11px;margin-top:8px}.block input,.block select{width:65%;min-width:0;border:1px solid #c9dbbe;background:white;border-radius:4px;padding:7px;font-size:12px}.block-top select{max-width:72%;padding:7px;border:1px solid #c9dbbe;border-radius:4px}.sim-bar{border-top:1px solid var(--line);padding-top:18px;margin-top:23px;display:flex;align-items:center;gap:10px}.primary{background:#153e30;color:#e2f6ba;border-color:#153e30}.primary:hover{background:#2f5740}#time{font:12px monospace;margin-left:auto}.input-control{border:1px solid var(--line);padding:12px;border-radius:7px;margin-top:12px}.input-control label{font-size:12px;display:block}.input-control input[type=range]{width:100%;accent-color:#5b8a3b}.input-control button{width:100%;background:#f1f5e9}.input-control button[aria-pressed=true]{background:#d7f88b}.sim-state{padding:12px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:10px;font-size:12px}.led-dot{width:20px;height:20px;border-radius:50%;background:#bcc7b4;border:2px solid #9fae97;display:inline-block}.led-dot.on{background:#edcb42;border-color:#c6a62a;box-shadow:0 0 18px #f3d74e88}.servo-indicator{height:30px;width:60px;position:relative;border-radius:25px 25px 3px 3px;border:1px solid #bed2af}.servo-indicator i{position:absolute;bottom:0;left:50%;width:2px;height:25px;transform-origin:bottom;background:#548c3a}#validation{font-size:11px;padding:12px;background:#eef5e5;border-radius:6px;color:#3d6330;white-space:pre-line}#validation.error{background:#fff1ea;color:#a54c2f}.code-panel pre{background:#0e2827;color:#cde3c3;padding:17px;border-radius:8px;max-height:450px;overflow:auto;font:11px/1.8 monospace;tab-size:2;min-height:230px}.code-actions{display:flex;gap:8px;margin-bottom:23px}#wiring{padding-left:17px;font-size:11px;line-height:1.9;color:#526b60}#wiring li{margin-bottom:10px}.code-panel details{border-top:1px solid var(--line);padding-top:15px;font-size:11px}.code-panel details a{display:block;margin-top:10px}.code-panel details summary{cursor:pointer;font-size:12px}#message{position:sticky;bottom:15px;background:#173e31;color:white;padding:12px 18px;border-radius:7px;font-size:12px}#message:empty{display:none}footer{font-size:10px;color:var(--muted);padding-top:24px}#empty{font-size:11px;text-align:center;color:var(--muted)}@media(max-width:1150px){.lab{grid-template-columns:210px 1fr}.code-panel{grid-column:1/-1}.code-panel pre{max-height:330px}.intro{align-items:start}.file-actions{max-width:290px}.board-badge{display:none}}@media(max-width:700px){main{padding:20px 14px}header{padding:15px}.intro{display:block}h1{font-size:32px}.file-actions{margin-top:18px;max-width:none}.lab{display:flex;flex-direction:column}.lab>aside,.canvas-panel,.code-panel{width:100%;padding:16px}.lab>aside #palette{grid-template-columns:1fr 1fr}.assistant{margin-top:18px}.uno{max-width:330px}.pin-strip{font-size:7px;word-spacing:1px}.board-face{height:95px}.component{grid-template-columns:1fr auto auto}header label{font-size:9px}header select{margin-left:0;padding:5px}.intro p{font-size:12px}input,select,textarea{font-size:16px!important}.block-top select{max-width:70%}.block input,.block select{width:60%}#drop-zone{padding:12px}.code-panel pre{font-size:11px}}[hidden]{display:none!important}
.catalog{background:#fff;border:1px solid #d8e2df;border-radius:20px;padding:24px;margin:0 0 28px}.catalog summary{font-size:22px;font-weight:750;cursor:pointer}.catalog summary span{float:right;font-size:14px;color:#526d65}.catalog>p{max-width:1000px;color:#52635c;line-height:1.6}.catalog-filters{display:flex;gap:16px;flex-wrap:wrap;margin:20px 0}.catalog-filters label{display:grid;gap:6px;flex:1;min-width:180px}.catalog-filters input{border:1px solid #cddbd5;border-radius:8px;padding:12px;font:inherit}#module-grid,#electronics-feed{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}#module-grid{max-height:470px;overflow:auto;padding:3px}.module-card{position:relative;border:1px solid #d8e2df;border-radius:14px;padding:18px;background:#f8fbf8;display:flex;flex-direction:column;gap:9px}.module-card h3,.module-card p{margin:0}.module-card p,.module-card small{line-height:1.5}.module-card small{color:#57675f}.module-card a{color:#116750}.module-icon{font-size:30px;color:#007a67}.module-card .badge{position:absolute;right:12px;top:19px;font-size:9px}.module-card button{margin-top:auto}.research-updates{margin-top:32px}.research-updates>p{max-width:980px;line-height:1.7}#electronics-feed{margin-top:20px}

.usb-panel{margin-top:28px;padding:24px;background:#eef6f1;border:1px solid #cbded3;border-radius:18px}.usb-panel p{max-width:960px;line-height:1.65}.usb-panel pre{white-space:pre-wrap;overflow-wrap:anywhere;color:#173d32;background:#fff;min-height:30px}.usb-panel a{color:#086a55}@media(max-width:700px){button,.file-button,select{min-height:44px}input,textarea,select{font-size:16px}.lab>*{min-width:0}.code-panel pre{max-height:340px}#module-grid{max-height:360px}.usb-panel{padding:18px}.file-actions{flex-wrap:wrap}}
/* Interactive component bench */
#advanced-lab{margin:32px 0;background:#102e32;color:#edf8f5;border-radius:24px;padding:30px;box-shadow:0 18px 45px #17393220}.adv-heading h2{font-size:clamp(25px,4vw,38px);letter-spacing:-1px;margin:8px 0}.adv-heading p,.adv-foot{color:#b6cfc9}.adv-heading .eyebrow{color:#cef899}.adv-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.adv-tabs button{background:#1c4044;color:#e4f5ef;border-color:#426066;border-radius:24px;font-size:13px}.adv-tabs button[aria-pressed=true],.adv-selector button[aria-pressed=true]{background:#d7f88b;color:#173932;border-color:#d7f88b}.adv-work{display:grid;grid-template-columns:1.2fr 1fr;gap:24px}.adv-view{background:#081c23;border:1px solid #34505a;border-radius:18px;padding:24px;min-width:0}.adv-screen{min-height:265px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px}.adv-number{font:500 clamp(27px,5vw,46px)/1.2 monospace;letter-spacing:-1px}.adv-label{font:11px monospace;letter-spacing:2px;text-align:center}.adv-controls{padding:8px 4px}.adv-control{display:block;margin:0 0 18px;font-size:13px}.adv-control>div{display:flex;align-items:center;gap:16px}.adv-control input[type=range]{flex:1;width:100%;accent-color:#d7f88b;min-height:44px}.adv-control output{min-width:40px;font:14px monospace}.adv-control select,.adv-control input:not([type]){display:block;width:100%;padding:10px;margin-top:6px}.adv-control input[type=checkbox]{margin-right:10px;width:20px;height:20px}.adv-controls p,.adv-foot p{font-size:12px}.adv-status{font:12px monospace;color:#d7f88b;min-height:36px;overflow-wrap:anywhere}.adv-status[data-on=true]{color:#ffbf80}.adv-radar{width:190px;height:190px;border:1px solid #6cb998;border-radius:50%;position:relative;background:repeating-radial-gradient(circle,transparent 0 29px,#2e635e 30px 31px),conic-gradient(from 40deg,transparent,#305b45,transparent);overflow:hidden}.adv-target{position:absolute;top:48%;color:#d7f88b;text-shadow:0 0 15px #c4ff62;font-size:20px;transform:translate(-50%,-50%)}.adv-laser{position:relative;width:90%;height:80px;background:linear-gradient(transparent 48%,#ff7474 49% 51%,transparent 52%)}.adv-laser .adv-target{color:#ffadad}.adv-heat{border:1px solid #52746e;padding:14px 40px;border-radius:40px}.adv-heat.on{background:#9d4724;color:#fff1d5}.adv-selector{display:flex;gap:7px;flex-wrap:wrap;justify-content:center}.adv-selector button{border-radius:50%;width:45px;height:45px;padding:0}.adv-touch{background:linear-gradient(135deg,#163e53,#185b54);border:7px solid #020e15;border-radius:20px;padding:24px;text-align:center;display:flex;flex-direction:column;gap:24px;max-width:100%;box-shadow:0 0 0 1px #59767a}.adv-touch>div{display:flex;gap:12px;justify-content:center}.adv-touch button{font-size:20px;min-width:50px}.adv-screen meter{width:80%;height:25px}.adv-log{font:12px monospace;align-self:stretch;overflow-wrap:anywhere;color:#aeeacb}.adv-foot{border-top:1px solid #345255;margin-top:24px;padding-top:12px}.intro h1{font-size:clamp(34px,5vw,54px)}#drop-zone{background-image:radial-gradient(#c4d7c7 1px,transparent 1px);background-size:18px 18px}.module-card{transition:transform .15s,box-shadow .15s}.module-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px #17393215}@media(max-width:700px){#advanced-lab{padding:18px 12px;border-radius:16px}.adv-work{grid-template-columns:1fr}.adv-view{padding:15px}.adv-tabs button{flex:1 1 125px}.adv-screen{min-height:230px}}