:root{--green:#0a6b45;--deep:#173c31;--mint:#e8f2ed;--ink:#15231f;--muted:#657872;--line:#d9e5e0;--warn:#fff3d7;--panel:#151817;--red:#ff2b20;--red-dark:#3b0b08;--shadow:0 18px 55px rgba(23,60,49,.13);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:#edf3f0}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 20% 0,#f8fbf9 0,#edf3f0 38%,#e7efeb 100%)}button,select,input{font:inherit}.topbar{height:68px;padding:0 max(20px,calc((100vw - 1280px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dfe9e5;background:rgba(255,255,255,.9);position:sticky;top:0;z-index:20}.brand{text-decoration:none;color:var(--green);font-weight:950;letter-spacing:.08em;font-size:24px}.brand span{color:var(--deep)}.top-actions{display:flex;align-items:center;gap:10px}.model-badge{background:var(--deep);color:#fff;padding:7px 12px;border-radius:999px;font-weight:900;font-size:13px}.edu-lang{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:800;color:var(--muted)}.edu-lang select{border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 8px}.page{max-width:1280px;margin:auto;padding:30px 20px 70px}.intro{display:flex;gap:32px;justify-content:space-between;align-items:end;margin-bottom:20px}.intro>div:first-child{max-width:800px}.eyebrow{margin:0 0 8px;color:var(--green);font-size:12px;font-weight:900;letter-spacing:.13em}.intro h1{font-size:clamp(30px,4vw,52px);line-height:1.03;margin:0 0 12px;letter-spacing:-.035em}.intro p{font-size:17px;color:var(--muted);line-height:1.6;margin:0}.intro-actions{display:flex;gap:10px;flex-wrap:wrap}.primary,.secondary,.ghost{border:0;border-radius:13px;padding:12px 17px;font-weight:850;cursor:pointer}.primary{background:var(--green);color:#fff;box-shadow:0 10px 24px #0a6b4530}.secondary{background:var(--deep);color:#fff}.ghost{background:#fff;color:var(--deep);border:1px solid var(--line)}.warning-strip{margin:18px 0 24px;border:1px solid #e6c778;background:var(--warn);color:#6a4b06;border-radius:16px;padding:13px 16px;line-height:1.5;font-size:14px}.workspace{display:grid;grid-template-columns:minmax(0,1.42fr) minmax(320px,.78fr);gap:22px;align-items:start}.sim-column{display:grid;gap:18px}.controller-wrap{display:grid;place-items:center;background:linear-gradient(160deg,#dfe9e4,#f8fbf9);border:1px solid var(--line);border-radius:28px;padding:34px 20px;box-shadow:var(--shadow)}.controller{width:min(100%,560px);background:linear-gradient(150deg,#242928,#0d100f);border-radius:34px;padding:28px;box-shadow:0 30px 70px #0006,inset 0 1px 0 #ffffff18;border:1px solid #3a4541;position:relative}.controller-brand{font-size:28px;color:#eef5f1;font-weight:950;font-style:italic;letter-spacing:.06em}.controller-model{position:absolute;right:28px;top:31px;background:#08744b;color:white;font-weight:900;padding:5px 10px;border-radius:5px;font-size:13px}.hardware-row{display:grid;grid-template-columns:minmax(0,1fr) 100px;gap:22px;align-items:center;margin-top:28px}.led-display{height:140px;background:#180302;border:10px solid #2c3330;border-radius:14px;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 35px #000,0 0 0 1px #000;overflow:hidden}.led-display span{font-family:"Courier New",monospace;font-weight:900;font-size:88px;letter-spacing:.03em;color:var(--red);text-shadow:0 0 5px #ff2b20,0 0 18px #ff2b20,0 0 36px #b3130d;min-width:3ch;text-align:center;font-variant-numeric:tabular-nums}.key-stack{display:grid;grid-template-rows:64px 26px 64px;align-items:center;justify-items:center}.key{width:76px;height:58px;border-radius:12px;border:1px solid #59645f;background:linear-gradient(#f2f4f3,#bfc5c2);box-shadow:0 6px 0 #68716d,0 10px 18px #0005;font-size:34px;font-weight:900;color:#16201c;cursor:pointer}.key:active,.key.active{transform:translateY(4px);box-shadow:0 2px 0 #68716d,0 5px 8px #0005}.both-key{border:0;background:transparent;color:#aeb9b4;font-weight:900;font-size:17px;letter-spacing:-.08em;cursor:pointer;padding:0 8px;border-radius:8px}.both-key:hover,.both-key.active{color:#fff;background:#ffffff12}.both-key::after{content:"";display:block;width:26px;height:2px;background:#74817b;margin:2px auto 0;border-radius:2px}.power-line{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:22px;padding-top:16px;border-top:1px solid #45504b;color:#dce7e2;font-size:13px}.out-dot{width:12px;height:12px;border-radius:50%;background:#3b4541;box-shadow:inset 0 0 0 2px #141817}.out-dot.on{background:#ff382d;box-shadow:0 0 12px #ff382d}.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}.sim-controls .row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.sim-controls .row+ .row{margin-top:13px}.sim-controls label{font-size:13px;font-weight:800;color:var(--muted)}.sim-controls input[type=number],.sim-controls select{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fff}.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.status-grid div{background:#f4f8f6;border:1px solid #e1ebe6;border-radius:14px;padding:12px}.status-grid span{display:block;color:var(--muted);font-size:12px;font-weight:750}.status-grid strong{display:block;margin-top:4px;font-size:18px}.lesson{position:sticky;top:88px}.lesson-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.lesson h2{margin:3px 0 0;font-size:25px}.progress-pill{background:var(--mint);color:var(--deep);border-radius:999px;padding:7px 10px;font-weight:900;font-size:12px}.lesson-body{font-size:16px;line-height:1.7;color:#30433c}.lesson-body p{margin:12px 0}.tip{background:#eef7f2;border-left:4px solid var(--green);border-radius:12px;padding:12px 13px;margin:14px 0;line-height:1.5}.tip strong{display:block;font-size:12px;letter-spacing:.08em;color:var(--green);margin-bottom:3px}.lesson-actions{display:flex;justify-content:space-between;gap:10px}.lesson-list{display:grid;gap:8px}.lesson-list button{width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-weight:800;cursor:pointer}.lesson-list button.active{border-color:#78ad95;background:#eef7f2}.reference{margin-top:22px}.reference-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.reference-grid article{border:1px solid var(--line);border-radius:15px;padding:14px;background:#fbfdfc}.reference-grid h3{margin:0 0 5px;font-size:16px}.reference-grid p{margin:0;color:var(--muted);line-height:1.5;font-size:14px}.modal{position:fixed;inset:0;display:none;place-items:center;background:#0c1f19a8;backdrop-filter:blur(5px);z-index:50;padding:20px}.modal.open{display:grid}.modal-card{width:min(100%,620px);background:#fff;border-radius:24px;padding:26px;box-shadow:0 30px 90px #0007}.modal-card h2{font-size:28px;margin:6px 0 10px}.modal-card p,.modal-card li{line-height:1.6;color:#43574f}.wide{width:100%;margin-top:10px}footer{max-width:1280px;margin:auto;padding:20px;color:var(--muted);display:flex;justify-content:space-between;gap:16px;font-size:13px}.pulse{animation:pulse .8s ease 2}@keyframes pulse{50%{transform:scale(1.07);box-shadow:0 0 0 7px #0a6b4525}}@media(max-width:900px){.workspace{grid-template-columns:1fr}.lesson{position:static}.intro{align-items:flex-start;flex-direction:column}.reference-grid{grid-template-columns:1fr 1fr}}@media(max-width:600px){.hardware-row{grid-template-columns:1fr 82px;gap:12px}.controller{padding:20px}.led-display{height:118px}.led-display span{font-size:68px}.key{width:65px;height:52px}.status-grid{grid-template-columns:1fr 1fr}.reference-grid{grid-template-columns:1fr}.edu-lang span{display:none}.page{padding-left:12px;padding-right:12px}.topbar{padding:0 12px}}