:root{--ink:#163b34;--muted:#657770;--paper:#f6f5ef;--line:#dce3da;--green:#17634e;--lime:#d8ef93;--red:#a63432;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}button,input,select{font:inherit}a{color:var(--green)}button,a,input,select{touch-action:manipulation}button,.button{cursor:pointer;border:0;border-radius:12px;padding:13px 18px;min-height:48px;font-weight:650;color:inherit;background:#e8ede5;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}button:hover,.button:hover{filter:brightness(.96)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b97121;outline-offset:3px}button:disabled{cursor:default;opacity:.6}header,main,footer,.faq{max-width:1100px;margin:auto;padding:24px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:-.5px}.brand b{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--green);color:var(--lime);font-size:16px}.header-actions{display:flex;gap:10px;align-items:center}.header-actions small{color:var(--muted)}.quiet{background:transparent;border:1px solid var(--line)}.action{background:var(--green);color:#fff}.lime{background:var(--lime);color:var(--ink)}.eyebrow{font-size:12px;letter-spacing:1.7px;text-transform:uppercase;font-weight:750;color:var(--muted)}h1{font-size:clamp(38px,5.4vw,62px);line-height:1.08;letter-spacing:-2px;margin:18px 0}h2{font-size:26px;line-height:1.3;margin:0 0 14px;letter-spacing:-.5px}h3{font-size:19px;line-height:1.4;margin:0 0 10px}p{margin:12px 0}.muted{color:var(--muted)}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;padding:24px 0 32px}.lead{font-size:18px;max-width:570px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.sign{background:var(--ink);color:var(--lime);border-radius:24px;padding:30px}.sign .eyebrow{color:#c7d4bf}.sign strong{font-size:88px;line-height:1.05;letter-spacing:-5px;display:block;margin:10px 0}.sign .metric-label{font-size:17px;color:#eef3dc}.sign-row{display:flex;justify-content:space-between;gap:12px;border-top:1px solid #ffffff25;padding:12px 0 0;margin-top:12px;font-size:14px;color:#f6f5ef}.sign-row span:last-child{color:var(--lime)}.version{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:16px;line-height:1.7}.version a{white-space:nowrap}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.card.primary{background:var(--green);color:#fff;border-color:var(--green)}.primary .muted{color:#d8e8dd}.tag{display:inline-block;background:#edf0e9;border-radius:7px;padding:4px 9px;font-size:11px;font-weight:700;letter-spacing:.5px;color:var(--ink)}.card h3{margin-top:14px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.stack{display:grid;gap:14px}.section{margin-top:28px}.study-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:16px}.filters{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}.filters .wide{grid-column:1/-1}label{font-size:14px;font-weight:600}select,input[type=text]{width:100%;margin-top:6px;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);min-height:48px}.full{width:100%;margin-top:12px}.bar{width:100%;height:8px;background:#e4e8dd;border-radius:8px;overflow:hidden;margin:12px 0}.bar i{height:100%;background:var(--green);display:block}.stats{display:flex;gap:28px;margin-top:18px;flex-wrap:wrap}.stats strong{font-size:25px;display:block;line-height:1.3}.stats span{font-size:12px;color:var(--muted)}.notice{padding:14px 18px;border-radius:12px;background:#fff0cf;font-size:14px;margin:14px 0}.notice:empty{display:none}.quiz{max-width:800px;margin:0 auto}.quiz h1{font-size:27px;line-height:1.45;letter-spacing:-.5px;margin:24px 0 16px}.quiz-top{padding:10px 0}.timer{font-variant-numeric:tabular-nums;font-weight:700}.timer.urgent{color:var(--red)}.choices{display:grid;gap:12px;border:0;padding:0;margin:18px 0}.option{display:flex;align-items:flex-start;gap:12px;padding:17px;background:#fff;border:1px solid var(--line);border-radius:14px;cursor:pointer;font-size:16px;font-weight:400;min-height:62px}.option:has(input:checked){background:#eff5e7;border-color:var(--green)}.option input{margin-top:6px;accent-color:var(--green);width:18px;height:18px;flex:none}.option b{font-size:13px;color:var(--muted);margin-right:8px}.option.correct{background:#e4f2d0;border-color:#42844c}.option.wrong{background:#fce8e5;border-color:var(--red)}.explain{padding:20px;background:#edf3e6;border-radius:14px;border-left:4px solid var(--green);margin:20px 0}.explain.bad{background:#fff0e8;border-color:var(--red)}.quiz-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.quiz-actions button{flex:1}.question-map{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0}.question-map button{min-width:40px;min-height:40px;padding:5px;border-radius:8px;font-size:12px}.question-map .done{background:var(--green);color:#fff}.question-map .current{outline:2px solid #b97121}.score{font-size:76px;font-weight:800;letter-spacing:-4px;line-height:1.2}.score small{font-size:26px;letter-spacing:0}.review-item{border-top:1px solid var(--line);padding:18px 0}.review-item summary{cursor:pointer;font-weight:650}.review-item .tag{margin-right:8px}.review-item p{font-size:14px}.faq h2{margin-top:0}.faq details{border-bottom:1px solid var(--line);padding:17px 0}.faq summary{cursor:pointer;font-weight:650}.faq p{color:var(--muted);font-size:15px}.topic-links{display:flex;gap:9px;flex-wrap:wrap;margin:16px 0}.topic-links a{border:1px solid var(--line);border-radius:30px;padding:7px 13px;font-size:13px;background:white;text-decoration:none}footer{font-size:12px;color:var(--muted);border-top:1px solid var(--line);margin-top:30px}dialog{width:min(92vw,520px);max-height:90vh;overflow:auto;border:1px solid var(--line);border-radius:20px;padding:24px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#102b2477}.dialog-close{float:right;min-height:40px;padding:5px 12px}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:14px 20px;border-radius:14px;width:max-content;max-width:90vw;z-index:20}.skip{position:absolute;left:16px;top:-80px}.skip:focus{top:8px;z-index:50;background:#fff;padding:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}@media(max-width:700px){header,main,footer,.faq{padding:16px}.header-actions small{display:none}.brand{font-size:18px}.header-actions button{font-size:13px;padding:10px 12px}.hero{grid-template-columns:1fr;gap:24px;padding:20px 0 24px}h1{font-size:42px;letter-spacing:-1.5px}.sign{padding:24px}.sign strong{font-size:65px;letter-spacing:-3px}.sign .sign-figure{display:flex;justify-content:space-between;align-items:center;gap:15px}.sign .metric-label{font-size:15px;max-width:120px}.grid,.study-layout{grid-template-columns:1fr}.card{padding:20px}.filters{grid-template-columns:1fr}.filters .wide{grid-column:auto}.quiz h1{font-size:23px}.option{padding:15px 12px}.quiz-top{align-items:flex-start}.quiz-top .muted{font-size:13px}.hero-actions>*{flex:1}.row .tag{max-width:100%;overflow-wrap:anywhere}.stats{gap:20px}.quiz-actions button{min-width:120px}dialog{padding:20px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}