:root{--bg:#f4f7f5;--surface:#fff;--surface2:#edf3ef;--text:#102019;--muted:#66786f;--green:#087e50;--red:#df293f;--line:#d7e3dc;--shadow:0 18px 45px rgba(9,42,29,.10)}html[data-theme=dark]{--bg:#090d0b;--surface:#101713;--surface2:#17211c;--text:#f2f7f4;--muted:#9db0a7;--line:#26352d;--shadow:0 18px 45px rgba(0,0,0,.35)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px Inter,Segoe UI,Arial,sans-serif}button,input{font:inherit}header{height:74px;padding:0 4vw;display:flex;align-items:center;gap:24px;position:sticky;top:0;z-index:9;background:var(--surface);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;min-width:290px}.brand b{font-size:26px}.brand i,footer i{color:var(--red);font-style:normal}.brand em,footer em{color:var(--green);font-style:normal}.brand small{font-weight:900;letter-spacing:.14em;color:var(--muted)}.logo{font-size:32px;color:var(--red)}nav{display:flex;gap:6px;flex:1}nav button,#theme,button{border:1px solid var(--line);background:var(--surface);color:var(--text);padding:10px 13px;border-radius:11px;cursor:pointer;font-weight:800}nav button{border:0;background:transparent;color:var(--muted)}nav button:hover{background:var(--surface2);color:var(--text)}main{max-width:1400px;margin:auto;padding:34px 4vw 70px}.view{display:none}.view.active{display:block}.hero{display:grid;grid-template-columns:1.5fr .7fr;gap:28px}.hero>div,.gaugeCard,.grid article,.card,.task,.result,.statsCards,.progressPanel{background:var(--surface);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}.hero>div{padding:50px}.eyebrow{font-size:12px;font-weight:900;letter-spacing:.15em;color:var(--green)}.red{color:var(--red)}h1{font-size:clamp(42px,5vw,68px);line-height:1;margin:12px 0 18px;letter-spacing:-.04em}.hero h1 strong{color:var(--green)}.hero p,.lead{font-size:19px;line-height:1.6;color:var(--muted)}.primary{background:var(--green);color:#fff;border-color:var(--green)}h2{font-size:34px}.gaugeCard{text-align:center!important;display:flex;flex-direction:column;align-items:center;justify-content:center}.gauge{--p:0;width:230px;height:120px;overflow:hidden;position:relative;margin:20px auto}.gauge:before{content:"";position:absolute;width:210px;height:210px;left:10px;top:10px;border-radius:50%;background:conic-gradient(from 270deg,var(--red) 0deg,#f0a331 45deg,#89bd4e 90deg,var(--green) calc(var(--p)*1.8deg),var(--surface2) calc(var(--p)*1.8deg) 180deg,transparent 180deg);mask:radial-gradient(circle,transparent 53%,#000 54%)}.gauge span{position:absolute;left:0;right:0;top:72px;font-size:42px;font-weight:900}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid article{padding:25px;min-height:260px}.grid article h3{font-size:24px}.grid article p{color:var(--muted);line-height:1.5}.locked{opacity:.6}.tag{display:inline-block;background:var(--surface2);color:var(--green);padding:7px 11px;border-radius:999px;font-size:12px;font-weight:900}.bar{height:9px;background:var(--surface2);border-radius:20px;overflow:hidden;margin:20px 0}.bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--red),var(--green));transition:.3s}.lesson{display:grid;grid-template-columns:270px 1fr;gap:24px}.lesson aside{background:#07130e;color:white;padding:26px;border-radius:24px;height:max-content}.lesson aside span,.lesson aside b{display:block;padding:10px 0}.lesson aside span{color:#9ab0a5}.content{max-width:900px}.card{padding:30px;margin:22px 0}.powers,.binary{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:22px}.powers span,.binary span{background:var(--surface2);padding:16px;border-radius:14px;text-align:center}.powers b,.binary small{display:block;color:var(--green);margin-top:5px}.binary span{font-size:38px;font-weight:900}.binary small{font-size:12px}.next{display:flex;justify-content:space-between;align-items:center;padding:24px;background:linear-gradient(135deg,#dff5e9,var(--surface));border-radius:18px}.wrap{max-width:900px;margin:auto}.head{display:flex;justify-content:space-between;align-items:flex-end}.counter b{font-size:52px;color:var(--green)}.big{height:11px}.task{padding:40px;margin-top:20px}.question{font-size:50px;font-weight:900;padding:36px 0}.answer{display:flex;gap:10px}.answer input{flex:1;padding:14px 18px;border:2px solid var(--line);border-radius:14px;background:var(--bg);color:var(--text);font-size:24px}.feedback,.hintbox{margin-top:14px;padding:15px;border-radius:13px}.feedback.good{background:#dff5e9;color:#075f3c}.feedback.bad{background:#fde4e8;color:#9b1d30}.hide{display:none}.hint{border:0;background:none;color:var(--green);padding-left:0}.hintbox{background:#fff3c9;color:#66550b}.stats{display:flex;justify-content:center;gap:30px;padding:20px;color:var(--muted)}.result{max-width:900px;margin:auto;padding:45px}.resultGrid{display:grid;grid-template-columns:300px 1fr;gap:35px;align-items:center}.bigGauge{width:300px;height:170px}.bigGauge:before{width:280px;height:280px}.bigGauge span{top:100px}.statsCards{display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden}.statsCards>div{padding:25px;border-right:1px solid var(--line)}.statsCards span{display:block;color:var(--muted)}.statsCards b{font-size:34px}.progressPanel{margin-top:22px;padding:30px;display:grid;grid-template-columns:1.4fr .7fr;gap:30px}.progressPanel aside{background:var(--surface2);padding:24px;border-radius:18px}.skill{display:grid;grid-template-columns:220px 1fr 55px;gap:12px;align-items:center}footer{display:flex;justify-content:space-between;padding:28px 4vw;border-top:1px solid var(--line);color:var(--muted)}@media(max-width:900px){nav{display:none}.hero,.lesson,.progressPanel,.resultGrid{grid-template-columns:1fr}.grid{grid-template-columns:1fr 1fr}.statsCards{grid-template-columns:1fr 1fr}}@media(max-width:600px){main{padding:20px}.grid{grid-template-columns:1fr}.hero>div{padding:28px}.answer{flex-direction:column}.statsCards{grid-template-columns:1fr 1fr}.skill{grid-template-columns:1fr}footer{flex-direction:column;gap:10px}.brand small{display:none}}