html,body,#root{margin:0;min-height:100%}body{background:var(--ds-page);color:#183238}.shell{position:relative;overflow:hidden;min-height:100vh;padding:4px 0 0}.top,.backline,.progress-label{display:flex;align-items:center;justify-content:space-between;gap:16px}.top{border-bottom:1px solid #dce8e7;padding:8px 0 22px}.logo{display:flex;align-items:center;gap:8px;font-weight:750;letter-spacing:-.035em;font-size:23px;color:#123e42;white-space:nowrap}.logo-accent{color:#158779}.logo-mark{width:34px;height:34px;display:inline-flex;color:#158779}.logo-mark svg{width:100%;height:100%}.top-note,.eyebrow,.topic,.progress-label,.pilot-note,.reference{font-size:12px;color:#607478}.eyebrow{font-weight:800;letter-spacing:.15em;color:#168574}.hero{border-radius:22px;background:linear-gradient(135deg,#eff9f5,#e8f3f1 64%,#d8ebe7);padding:48px 46px;margin:28px 0 36px;position:relative}.hero:after{content:"✚";position:absolute;right:38px;top:17px;font-size:160px;line-height:1;color:#1f8e7e17;pointer-events:none}.hero h1,.question-card h1,.results h1{font-family:Georgia,serif;font-size:clamp(32px,5vw,52px);letter-spacing:-.04em;line-height:1.08;margin:18px 0;color:#123e42;position:relative}.hero p{max-width:520px;font-size:17px;line-height:1.55;position:relative}.hero-stat{margin-top:28px;color:#365b60;font-size:13px}.hero-stat strong{font-size:20px;color:#157f74}.hero-stat span{margin:0 9px}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}.subject-card{appearance:none;border:1px solid #dae9e5;border-radius:18px;padding:23px 19px;text-align:left;background:#fff;display:flex;flex-direction:column;gap:12px;min-height:214px;cursor:pointer;color:#163d41;transition:transform .2s,box-shadow .2s,border-color .2s}.subject-card:hover,.subject-card:focus-visible{transform:translateY(-3px);box-shadow:0 12px 28px #123e4217;border-color:#168574}.subject-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#e6f5f0;color:#168574;font-size:24px}.subject-title{font-weight:700;font-size:17px;line-height:1.25}.subject-detail{font-size:12px;color:#63777a}.arrow{color:#168574;font-weight:700;font-size:13px;margin-top:auto}.pilot-note{line-height:1.5;margin:26px 0 52px}.backline{margin:28px 0 30px;font-size:13px;color:#687c80}.text-button{border:0;background:none;color:#168574;cursor:pointer;font:inherit;padding:12px 0}.progress-label{margin:0 0 10px}.progress{height:7px;background:#e8f0ee;border-radius:8px;overflow:hidden}.progress span{display:block;height:100%;background:#168574;transition:width .25s}.question-card{margin:29px 0 54px}.topic{font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#168574}.topic span{font-weight:400;color:#85999b}.question-card h1{font-size:clamp(25px,3.4vw,36px);line-height:1.25;max-width:760px;margin:17px 0 29px}.options{display:grid;gap:10px}.option{border:1px solid #dce9e7;border-radius:12px;background:#fff;color:#193d41;padding:15px 18px;display:flex;align-items:center;gap:17px;text-align:left;min-height:60px;width:100%;cursor:pointer;font-size:15px;line-height:1.35}.option b{display:grid;place-items:center;flex:0 0 29px;height:29px;border-radius:8px;background:#eff5f3;color:#35756f;font-size:12px}.option:hover:not(:disabled),.option:focus-visible:not(:disabled){border-color:#13897b;background:#f5fbf8}.option:disabled{cursor:default}.option.correct{border-color:#168574;background:#e9f7f1}.option.correct b{background:#168574;color:#fff}.option.incorrect{border-color:#d57070;background:#fff0ef}.option.incorrect b{background:#bc5858;color:#fff}.option.dim{opacity:.63}.option strong{margin-left:auto;font-size:21px}.feedback{margin-top:25px;background:#f3faf7;border-left:4px solid #168574;padding:22px 24px;border-radius:0 12px 12px 0;line-height:1.6}.feedback>strong{font-size:18px;color:#135f56}.feedback p{margin:9px 0 14px}.reference{line-height:1.5;overflow-wrap:anywhere}.reference a{color:#137f73}.primary,.secondary{font:inherit;font-weight:700;font-size:14px;min-height:45px;padding:11px 21px;border-radius:7px;cursor:pointer}.primary{border:1px solid #147f72;background:#147f72;color:#fff}.secondary{border:1px solid #c9ded9;background:#fff;color:#147f72}.feedback .primary{margin-top:20px}.results{margin:60px auto 100px;max-width:620px;text-align:center}.results h1{margin:18px}.score{border-radius:22px;background:#e8f5f0;padding:32px;display:flex;flex-direction:column;gap:9px;color:#176d65}.score strong{font-size:65px;line-height:1}.results p{line-height:1.6}.result-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:24px}footer{border-top:1px solid #dce8e7;padding:25px 0 8px;color:#647678}.footer-brand .logo{font-size:16px;opacity:.7}.footer-brand .logo-mark{width:24px;height:24px}footer .file-closing{margin-top:12px}.watermark{position:absolute;right:10px;bottom:44px;transform:rotate(-90deg) translate(100%);transform-origin:right bottom;color:#a9cbc5;opacity:.3;font-size:12px;font-weight:800;letter-spacing:.1em;pointer-events:none}@media(max-width:700px){.top-note{font-size:10px;max-width:126px;text-align:right}.hero{padding:36px 25px;margin:22px 0 32px}.hero:after{right:10px;font-size:95px}.hero p{font-size:15px}.subject-grid{grid-template-columns:1fr}.subject-card{min-height:112px;padding:16px;display:grid;grid-template-columns:42px 1fr;column-gap:14px;row-gap:3px}.subject-icon{grid-row:span 3}.subject-title{font-size:16px}.subject-detail,.arrow{margin:0}.question-card{margin:22px 0 35px}.option{font-size:14px;padding:12px}.feedback{padding:18px}.results{margin:45px auto 75px}}@media(min-width:701px)and (max-width:900px){.subject-grid{grid-template-columns:repeat(2,1fr)}}.shell{min-height:0}.watermark{top:85px;right:16px;bottom:auto;transform:none;opacity:.22}@media(max-width:700px){.watermark{top:84px;right:24px;font-size:10px;opacity:.18}}.results .score{margin-bottom:22px}.hero-cta{margin-top:24px;position:relative;z-index:1}.visual-card{width:100%;display:flex;align-items:center;gap:16px;text-align:left;border:1px solid #bbe0d5;background:#ecf8f3;border-radius:18px;padding:19px;color:#123e42;cursor:pointer;min-height:100px;margin:14px 0 34px}.visual-card>span:nth-child(2){display:flex;flex-direction:column;gap:4px;flex:1}.visual-card strong{font-size:19px}.visual-card small{font-size:13px;line-height:1.4;color:#536f71}.visual-card>b{font-size:13px;color:#168574;white-space:nowrap}.visual-card:hover,.visual-card:focus-visible{outline:2px solid #168574}.diagram-wrap{max-width:600px;margin:0 auto}.diagram-title{text-align:center;color:#168574;letter-spacing:.12em;font-size:11px;font-weight:750;margin:0 0 10px}.diagram-canvas{position:relative;aspect-ratio:400/360;background:radial-gradient(circle at 50% 42%,#fff,#f4f8f5);border:1px solid #dce9e7;border-radius:18px;overflow:hidden}.diagram-canvas svg{display:block;width:100%;height:100%}.hotspot{position:absolute;transform:translate(-50%,-50%);width:54px;height:54px;min-width:44px;min-height:44px;display:grid;place-items:center;border-radius:50%;border:2px solid #fff;background:#168574;color:#fff;box-shadow:0 0 0 5px #1685743a,0 4px 10px #103b4240;font-weight:800;font-size:15px;cursor:pointer;touch-action:manipulation}.hotspot:hover:not(:disabled),.hotspot:focus-visible{outline:3px solid #123e42;outline-offset:5px;scale:1.1}.hotspot:disabled{cursor:default}.hotspot.hit-correct{background:#137b63;box-shadow:0 0 0 7px #3abf8780}.hotspot.hit-wrong{background:#bc5858;box-shadow:0 0 0 7px #bc58585c}.hotspot.hit-dim{opacity:.56}.diagram-caption{text-align:center;color:#536e70;line-height:1.5;font-size:13px;margin:11px auto 0}.diagram-wrap+.feedback{margin-top:20px}@media(max-width:700px){.visual-card{gap:12px}.visual-card>b{font-size:11px}.visual-card small{font-size:12px}.hotspot{width:48px;height:48px}.diagram-wrap{margin:0 -8px}}:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--ds-page:#f8fbfa}*{box-sizing:border-box}button{font-family:inherit}.file-card{max-width:1120px;margin:0 auto;padding:18px clamp(18px,4vw,58px)}.file-group>h2{font-size:19px;color:#123e42;margin:20px 0 0}.file-closing{font-size:12px;line-height:1.5}.install-hint{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:17px 19px;border-radius:14px;background:#f1f8f6;border:1px solid #d6eae5;color:#234b4e;font-size:13px}.install-hint strong{font-size:14px}.install-hint span{flex:1;min-width:240px;line-height:1.45}@media(max-width:700px){.install-hint{align-items:flex-start}.install-hint span{min-width:100%}}.feedback p{white-space:pre-line}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:700px){.subject-grid{grid-template-columns:1fr}}.setup-card{max-width:680px;margin:36px auto 80px;padding:36px;border-radius:22px;background:#f3faf7;border:1px solid #d6eae5}.setup-card h1{font-family:Georgia,serif;font-size:clamp(30px,5vw,46px);line-height:1.15;color:#123e42;margin:13px 0}.setup-card p{line-height:1.5}.available-count{font-weight:650;color:#168574}.length-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:22px 0}.length-choice{background:#fff;border:1px solid #bfdcd4;color:#123e42;border-radius:13px;padding:14px 8px;min-height:85px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px}.length-choice strong{font-size:23px}.length-choice small{font-size:12px}.length-choice.chosen{background:#d8efe7;border:2px solid #168574}.length-choice:focus-visible{outline:3px solid #123e42;outline-offset:2px}.setup-note{font-size:12px;color:#607478;margin:0 0 25px}@media(max-width:700px){.setup-card{padding:26px 18px;margin:25px 0 60px}.length-grid{gap:7px}.length-choice{min-height:78px}.length-choice strong{font-size:20px}}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1}.hero-actions .secondary{background:transparent;border-color:#9fc9be}.setup-label{display:block;color:#123e42;font-weight:750;margin:24px 0 9px}.subject-select{width:100%;border:1px solid #9fc9be;border-radius:10px;padding:13px 15px;background:#fff;color:#123e42;font:inherit;font-size:16px}.subject-select:focus-visible{outline:3px solid #168574;outline-offset:2px}.setup-card .available-count{margin-top:12px}.setup-card .length-grid{margin-top:10px}.track-hero{margin-bottom:23px;padding-top:40px;padding-bottom:40px}.track-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0 30px}.track-card{min-height:255px;border-radius:18px;padding:24px;display:flex;flex-direction:column;gap:15px;text-align:left;color:#123e42;background:#fff;border:1px solid #d7e8e3;font:inherit}.track-card.available{cursor:pointer;background:#eaf6f1;border-color:#a7d8c8}.track-card.available:hover,.track-card.available:focus-visible{outline:2px solid #168574;outline-offset:2px}.track-kicker{font-size:11px;font-weight:800;letter-spacing:.13em;color:#168574}.track-card strong{font-family:Georgia,serif;font-size:36px}.track-card span:nth-of-type(2){font-size:14px;line-height:1.5;color:#365b60}.track-card b{font-size:14px;color:#168574;margin-top:auto}.track-card.coming{background:#f5f7f6;border-color:#e0e8e6}.track-card.coming .track-kicker{color:#677b7d}.track-card em{font-size:12px;font-style:normal;color:#677b7d;margin-top:auto}.track-grid+.install-hint{margin-top:18px}@media(max-width:700px){.track-grid{grid-template-columns:1fr}.track-card{min-height:170px;padding:20px;gap:10px}.track-card strong{font-size:30px}.track-hero{padding-top:34px;padding-bottom:34px}}