:root{--ink:#21382e;--green:#245640;--muted:#737b70;--paper:#f5f4ed;--line:#dcded3}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header,main{max-width:1120px;margin:auto;padding:0 32px}header{height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header>span{font-size:10px;letter-spacing:1.8px;color:var(--muted)}.brand{text-decoration:none;font-size:25px;font-weight:750;letter-spacing:-1.3px;color:var(--ink)}.brand span{color:#c39354}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:center;padding:64px 0 50px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--muted)}h1{font:normal 58px/1.07 Georgia,serif;letter-spacing:-2px;margin:19px 0}h1 em{color:var(--green);font-weight:normal}.lead{color:var(--muted);font-size:16px}.summary{padding:28px 32px;border:1px solid var(--line);border-radius:16px;background:#eeeee4}.summary b{font:60px Georgia,serif}.summary span:not(.eyebrow){color:var(--muted);font-size:14px}.summary p{font-size:12px;color:var(--muted);margin-bottom:0}progress{width:100%;height:7px;accent-color:var(--green)}nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px}button,select,textarea,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:8px;padding:11px 16px;font-size:13px;font-weight:600;transition:background .15s}button:hover{background:#e8ebdf}button:focus-visible,select:focus-visible,textarea:focus-visible,input:focus-visible{outline:3px solid #bf954e;outline-offset:3px}button:disabled{opacity:.55;cursor:default}nav button{border:0;color:var(--muted)}nav button.active{background:var(--ink);color:white}.workspace{background:#fffefa;border:1px solid var(--line);border-radius:18px;overflow:hidden}.settings{display:flex;align-items:end;gap:18px;padding:22px 30px;background:#f0f1e9;border-bottom:1px solid var(--line)}label{font-size:11px;color:var(--muted);display:block}select{display:block;background:#fffefa;border:1px solid var(--line);border-radius:7px;padding:10px;margin-top:6px;max-width:310px;color:var(--ink);font-size:13px}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#173e2c}.settings .primary{margin-left:auto}.quiz{padding:34px 40px;min-height:270px}.empty{text-align:center;padding:20px}h2{font-size:24px;line-height:1.45;font-weight:550;margin:18px 0}.empty h2{font-family:Georgia,serif;font-size:32px}.hint,.meta{font-size:12px;color:var(--muted)}.meta{display:flex;justify-content:space-between;gap:16px}.options{display:grid;gap:10px;margin:22px 0}.option{display:flex;gap:16px;align-items:flex-start;text-align:left;padding:17px 20px;font-size:15px;font-weight:400;line-height:1.6;background:white}.option .number{flex:0 0 26px;height:26px;border-radius:5px;background:#f2f2ec;text-align:center;font-size:12px;line-height:26px}.option.selected{border-color:var(--green);background:#eef4ec}.option.right{border-color:#6d9771;background:#edf5eb;opacity:1}.option.wrong{border-color:#c48470;background:#fbeee8;opacity:1}.option:disabled{opacity:1}.actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}.feedback{padding:22px;border-radius:10px;background:#f0f4ed;margin-top:20px}.feedback.error{background:#fcf0e8}.remember{padding:18px 22px;background:#edf0da;border-left:3px solid #8e9b55;margin:20px 0;font-size:16px}.source{font-size:12px;color:var(--muted)}details{margin:14px 0}summary{cursor:pointer;font-size:14px;font-weight:600}.knowledge{margin:42px 0}.section-head{display:flex;align-items:center;justify-content:space-between}.section-head h2{font-size:18px}.section-head span,.legend{font-size:11px;color:var(--muted)}#map{display:grid;grid-template-columns:repeat(10,1fr);gap:9px}.tile{padding:10px 0;background:#eeeee7;border-color:transparent;font-weight:500}.tile.studying{background:#e5ead7;color:#526335}.tile.learned{background:var(--green);color:white}.tile.error{box-shadow:inset 0 -3px #c38c6e}.legend span{margin-left:20px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:28px 0;font-size:12px}footer p{color:var(--muted)}.backup{display:flex;gap:8px;align-items:start;flex-wrap:wrap}.backup button{font-size:11px}textarea{width:100%;min-height:160px;padding:18px;border:1px solid var(--line);border-radius:8px;color:var(--ink);resize:vertical}input[type=search]{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px}.entry{border-bottom:1px solid var(--line);padding:12px 0}.entry summary{font-size:16px}.result{font:52px Georgia,serif}.hidden{display:none!important}@media(max-width:720px){header,main{padding-left:18px;padding-right:18px}header{height:70px}header>span{font-size:8px;max-width:150px;text-align:right}.hero{grid-template-columns:1fr;gap:20px;padding:30px 0}h1{font-size:45px}.summary{padding:18px 22px}.summary b{font-size:42px}.settings{padding:18px;flex-wrap:wrap;gap:12px}.settings label:first-child{width:100%}select{width:100%;max-width:none}.settings .primary{margin-left:0;flex:1}.quiz{padding:22px 18px}h2{font-size:20px}.option{padding:14px 12px;font-size:14px}nav{gap:2px}nav button{padding:9px;font-size:11px}#map{grid-template-columns:repeat(5,1fr)}.section-head{display:block}.section-head span{display:block;margin-bottom:15px}footer{display:block}.legend span{display:block;margin-left:0}.meta{font-size:11px}.empty{padding:10px 0}}