:root{color-scheme:dark;--bg:#061326;--panel:#0a2039;--line:#24516c;--cyan:#53dcff;--mint:#45f0cc;--purple:#bd9bff;--text:#edf7ff;--muted:#a9c4db}*{box-sizing:border-box}body{margin:0;color:var(--text);font:16px/1.6 system-ui,Segoe UI,sans-serif;background:radial-gradient(ellipse at 80% 0,#103556,transparent 55%),var(--bg)}a{color:var(--cyan)}button,input,select,textarea{font:inherit}button,select,input[type=number],textarea{border:1px solid var(--line);background:#0c2946;color:var(--text);border-radius:9px;padding:9px 13px;max-width:100%}button{cursor:pointer;transition:background .15s}button:hover,button[aria-pressed=true]{background:#165173;border-color:var(--cyan)}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--mint);color:#052b33;font-weight:750}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #ffc76b;outline-offset:4px}[hidden]{display:none!important}.wrap{width:min(1380px,94%);margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}.logo{width:210px;max-width:42vw;height:44px}.site-header nav,.breadcrumbs{display:flex;gap:16px;flex-wrap:wrap}.breadcrumbs{font-size:13px;padding:22px 0;color:var(--muted)}h1{font-size:clamp(28px,3.5vw,48px);line-height:1.13;max-width:1050px;margin:12px 0 18px}h2{font-size:24px;line-height:1.3}h3{font-size:19px}.eyebrow{color:var(--cyan);letter-spacing:.16em;font-size:12px;font-weight:800}.lead{color:#c3dcea;max-width:880px;font-size:18px}.tags{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.tags span{border:1px solid var(--line);border-radius:8px;padding:5px 14px;color:var(--mint);font-size:13px}.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:25px 0}.step{padding:12px;border:1px solid var(--line);border-radius:9px;font-size:12px;color:var(--muted)}.step.done{color:var(--mint);border-color:#268b7b;background:#103c40}.tabs,.toolbar,.row{display:flex;flex-wrap:wrap;gap:9px;align-items:center}.tabs{margin:24px 0 16px}.tabs button{flex:1;min-width:130px}.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:18px}.panel{border:1px solid var(--line);border-radius:15px;background:linear-gradient(140deg,#0d2843dd,#071c32ee);padding:22px;min-width:0;box-shadow:0 10px 36px #0002}.panel h2,.panel h3{margin-top:0}.scene{background:radial-gradient(ellipse at center,#16355980,transparent 65%),linear-gradient(#19374e35 1px,transparent 1px),linear-gradient(90deg,#19374e35 1px,transparent 1px);background-size:auto,32px 32px,32px 32px;border-radius:12px;overflow:hidden;position:relative}.scene svg{width:100%;display:block;max-height:530px;touch-action:pan-y}.scene.pan svg{touch-action:none}.scene svg text{fill:#d9f0ff;font:14px system-ui}.scene svg [data-pick]{cursor:pointer;outline:none}.scene svg [data-pick]:focus{filter:drop-shadow(0 0 5px #fff)}.scene svg [aria-pressed=true]{filter:drop-shadow(0 0 8px #71edff)}.control{display:block;margin:17px 0}.control>span{display:flex;justify-content:space-between;gap:10px;font-size:14px;color:var(--muted)}.control input[type=range]{width:100%;accent-color:var(--cyan);min-height:30px}.control select{width:100%;margin-top:5px}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:15px 0}.metric{padding:12px;background:#061a2c;border:1px solid #254863;border-radius:10px}.metric b{display:block;color:var(--cyan);font-size:21px}.metric span{font-size:12px;color:var(--muted)}.note,.feedback{padding:12px 15px;border-left:3px solid var(--cyan);background:#0a2a42;border-radius:5px;margin:12px 0}.feedback{min-height:48px}.feedback.good{border-color:var(--mint)}.feedback.bad{border-color:#ff9d8b}small,.muted{color:var(--muted)}.below{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:18px 0}.chart{width:100%;display:block;background:#07192b;border-radius:9px}.chart text{fill:#aac6da;font:12px system-ui}.legend{display:flex;gap:15px;flex-wrap:wrap;font-size:13px}.legend span:before{content:'●';color:var(--c);margin-right:6px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:9px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.table-wrap{overflow:auto}.practice{margin:24px 0}.questions{display:grid;gap:16px}.question{padding:16px;background:#061a2c;border:1px solid var(--line);border-radius:10px}.question label{display:block;margin-bottom:10px}.question select{width:100%}.question input{width:160px}.question .feedback:empty{display:none}.score{font-size:22px;color:var(--mint)}textarea{width:100%;min-height:90px}footer{padding:24px 0;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.button-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:14px 0}.sequence{display:flex;gap:6px;flex-wrap:wrap}.sequence button{font-size:13px}.skip{position:absolute;top:-80px}.skip:focus{top:5px;z-index:5}.result-list{max-height:240px;overflow:auto}.mono{font-variant-numeric:tabular-nums}.compare{display:grid;grid-template-columns:1fr 1fr;gap:10px}.svg-button{cursor:pointer}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}@media(max-width:900px){.workspace{grid-template-columns:1fr}.below{grid-template-columns:1fr}.steps{grid-template-columns:repeat(3,1fr)}.panel{padding:16px}}@media(max-width:480px){body{font-size:15px}.site-header{align-items:flex-start}.site-header nav{gap:5px;font-size:12px}.steps{gap:4px}.step{padding:7px}.metric b{font-size:18px}.tabs button{min-width:100px;padding:8px}.compare{grid-template-columns:1fr}h2{font-size:21px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.workspace{align-items:start}.scene svg text.caption{font-size:12px}.chart circle:focus{stroke:#fff;stroke-width:3px}.panel .toolbar{margin-top:14px}.chart{min-height:145px}
