@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{color-scheme:light;--paper:#f5f4ee;--ink:#183c33;--muted:#67756d;--line:#dce2d8;--green:#215844;--lime:#e0efad;--red:#9c3434;--white:#fffefa}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px 'DM Sans',system-ui,sans-serif}button,input,select{font:inherit}button,a,label.upload{-webkit-tap-highlight-color:transparent}button{-webkit-appearance:none;appearance:none;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #7c9c3b;outline-offset:4px}button:disabled{cursor:default}header{max-width:1120px;margin:auto;padding:28px 34px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:800 24px Manrope,system-ui}.brand-icon{font:700 18px monospace;color:var(--lime);background:var(--ink);padding:10px;border-radius:11px}.beta{font:600 9px 'DM Sans',sans-serif;letter-spacing:1.6px;border-left:1px solid #cad3c7;margin-left:12px;padding-left:20px;color:var(--muted)}.quiet{border:0;background:none;color:var(--ink);padding:10px;font-size:13px;font-weight:600}main{max-width:1040px;margin:0 auto;padding:52px 34px 28px}h1,h2,h3{font-family:Manrope,system-ui;letter-spacing:-1.1px}h1{font-size:clamp(36px,5.5vw,58px);line-height:1.12;font-weight:800;margin:15px 0 18px}h1 em{font-style:normal;color:#6e8760}h2{font-size:25px;line-height:1.35}p{line-height:1.6}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:#658255}.intro p{color:var(--muted);max-width:410px;margin:0}.hero{display:grid;grid-template-columns:1.4fr 1fr;gap:42px;align-items:center;margin-bottom:42px}.hero-card{border-radius:22px;background:#153f35;color:#f9f8f1;padding:27px 28px;box-shadow:0 14px 35px #183c330c;transform:rotate(2deg)}.dots{display:flex;gap:6px;margin-bottom:24px}.dots i{width:7px;height:7px;border-radius:50%;background:#789082}.dots i:first-child{background:#d9e9b1}.code-label{font-size:10px;letter-spacing:1.5px;color:#b5c8b2}.hero-card pre{font-size:13px;line-height:1.8;background:none;padding:0;color:#d5e5ca}.code-comment{color:#8ba491}.code-yellow{color:#e7dd9d}.hero-answer{font-size:12px;border-top:1px solid #456359;padding-top:15px;color:#d2decd}.stats{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:14px;margin-bottom:34px;background:#fffefa80}.stat{padding:20px 24px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{font:800 26px Manrope;display:block}.stat span{font-size:12px;color:var(--muted)}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin:28px 0 14px}.section-heading h2{margin:0;font-size:21px}.section-heading span{font-size:12px;color:var(--muted)}.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.topic{padding:20px;text-align:left;border:1px solid var(--line);border-radius:14px;background:var(--white);color:var(--ink);transition:.15s}.topic.active{border:2px solid var(--green);background:#edf1e5;padding:19px}.topic:hover{transform:translateY(-2px)}.topic-top{display:flex;justify-content:space-between;align-items:center}.topic-icon{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:#eaf0de;font:700 16px monospace}.topic b{font-size:16px;display:block;margin:15px 0 5px}.topic small{font-size:12px;color:var(--muted)}.check{width:18px;height:18px;border:1px solid #b6c4af;border-radius:50%;font-size:12px;text-align:center}.active .check{background:var(--green);color:white;border-color:var(--green)}.start-panel{display:flex;justify-content:space-between;gap:22px;align-items:center;margin-top:22px;padding:23px 0}.lengths{display:flex;gap:6px;margin-top:8px}.lengths button{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:8px;padding:9px 15px;font-size:13px}.lengths .active{background:var(--ink);color:white;border-color:var(--ink)}.label{font-size:12px;color:var(--muted)}.primary{-webkit-appearance:none;appearance:none;border:2px solid #163e2e;border-radius:10px;background:#215844;background-image:none;color:#ffffff;-webkit-text-fill-color:#ffffff;padding:16px 26px;font-weight:700;min-height:50px}.primary:hover{background:#173d2f;color:#ffffff;-webkit-text-fill-color:#ffffff}.primary:disabled{opacity:.45}.secondary{border:1px solid var(--line);border-radius:10px;background:var(--white);color:var(--ink);padding:12px 18px;min-height:44px}.review{display:flex;justify-content:space-between;align-items:center;gap:15px;border-top:1px solid var(--line);padding:22px 0}.review h3{margin:0 0 6px;font-size:16px;letter-spacing:-.3px}.review p{margin:0;color:var(--muted);font-size:13px}.tip{padding:16px 20px;border-radius:10px;background:#e9eddf;font-size:13px;color:#56674e;margin-top:18px}.tip b{color:var(--ink)}footer{text-align:center;font-size:12px;color:var(--muted);padding:25px 24px 35px;line-height:1.8}footer span{font-size:10px}.quiz{max-width:720px;margin:auto}.quiz-top{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.progress{height:5px;background:#dce3d5;border-radius:6px;margin:16px 0 30px;overflow:hidden}.progress div{height:100%;background:var(--green);transition:width .2s}.question-card{background:var(--white);border:1px solid var(--line);padding:30px;border-radius:18px}.tag{display:inline-block;padding:5px 9px;border-radius:5px;background:#edf1e4;color:#536b44;font-size:11px;font-weight:700}.question-card h2{margin:18px 0;font-size:24px}pre{background:#173e34;color:#eef1df;border-radius:12px;padding:20px;font:14px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;overflow-x:auto;tab-size:4}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}p code{font-size:13px}.answers{display:grid;gap:10px;margin-top:24px}.answer{display:flex;align-items:center;gap:13px;background:var(--white);border:1px solid #d5ddd0;border-radius:10px;padding:15px;text-align:left;color:var(--ink);width:100%;min-height:54px}.answer .letter{font:600 12px monospace;width:26px;height:26px;border-radius:6px;display:grid;place-items:center;flex-shrink:0;background:#f0f2ea}.answer .answer-text{font:13px/1.5 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere}.answer.selected{border:2px solid var(--green);padding:14px;background:#eff3e8}.answer.correct{border:2px solid #3d7855;padding:14px;background:#e8f2e2}.answer.incorrect{border:2px solid #b45850;padding:14px;background:#faece7}.feedback{margin-top:22px;padding:20px;background:#eaf1e3;border-radius:12px;line-height:1.6;font-size:14px}.feedback.wrong{background:#f7ede2}.feedback strong{display:block;margin-bottom:6px}.question-actions{display:flex;justify-content:flex-end;margin-top:22px}.result{text-align:center;padding:24px 0}.score-circle{width:140px;height:140px;border-radius:50%;background:#e4edcf;display:grid;place-content:center;margin:20px auto;color:var(--ink)}.score-circle strong{font:800 40px Manrope}.score-circle span{font-size:12px}.result p{color:var(--muted)}.result-actions{display:flex;justify-content:center;gap:10px;margin:26px 0}.result-list{text-align:left;display:grid;gap:12px}.result-item{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px;font-size:14px}.result-item summary{cursor:pointer;line-height:1.5;font-weight:600}.result-item p{font-size:13px;color:var(--ink)}dialog{max-width:560px;width:calc(100% - 28px);border:1px solid var(--line);border-radius:20px;padding:26px;background:var(--paper);color:var(--ink);max-height:85dvh}dialog::backdrop{background:#133e3577;backdrop-filter:blur(3px)}.dialog-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.dialog-head h2{font-size:23px;margin-top:0}dialog p{font-size:14px;color:var(--muted)}dialog .secondary{display:block;width:100%;margin:9px 0}.upload{display:block;position:relative;border-radius:10px;background:var(--green);color:white;padding:15px;text-align:center;cursor:pointer;margin-top:20px;font-weight:600}.upload input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.upload.secondary{color:var(--ink);background:var(--white);font-weight:400}details{font-size:13px;margin-top:20px}summary{cursor:pointer}#importStatus{color:var(--ink)}.empty{padding:30px;text-align:center}.storage-warning{font-size:13px;background:#ffebcf;padding:12px;border-radius:9px;margin-bottom:18px}
@media(max-width:650px){header{padding:18px 20px}.brand{font-size:21px}.beta{display:none}main{padding:30px 20px 16px}.hero{grid-template-columns:1fr;gap:24px;margin-bottom:28px}h1{font-size:40px;margin:12px 0}.intro p{font-size:14px}.hero-card{display:none}.stats{margin-bottom:26px}.stat{padding:16px 12px}.stat strong{font-size:24px}.stat span{font-size:10px}.topics{gap:8px}.topic{padding:14px 10px}.topic.active{padding:13px 9px}.topic b{font-size:14px}.topic small{font-size:10px}.topic-icon{width:30px;height:30px;font-size:14px}.section-heading span{font-size:10px}.start-panel{align-items:flex-end;gap:10px}.primary{padding:15px 20px}.lengths button{padding:9px 12px}.review .secondary{font-size:12px;padding:12px;white-space:nowrap}.question-card{padding:20px 16px}.question-card h2{font-size:21px}.quiz-top{font-size:11px}pre{font-size:12px;padding:15px}.answer .answer-text{font-size:12px}.answer{padding:12px}.answer.selected,.answer.correct,.answer.incorrect{padding:11px}.result-actions{flex-direction:column}.question-actions .primary{width:100%}.tip{font-size:12px}footer{font-size:11px}}