@import url('https://fonts.googleapis.com/css2?family=Golos+Text:wght@400;450;500;550;600;650;700;750;800&display=swap');
:root{--bg:#faf9f6;--paper:#fff;--ink:#28372f;--muted:#8a8c83;--line:#e9e9e1;--orange:#e77b4c;--green:#51745b;--soft:#eef2e8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px 'Golos Text',sans-serif}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #e9a17b;outline-offset:4px}button{color:inherit}svg{display:block}i svg{width:20px;height:20px}i{display:inline-flex;font-style:normal}.sidebar{width:246px;position:fixed;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--line);padding:33px 23px;display:flex;flex-direction:column;z-index:5}.brand{display:flex;align-items:center;gap:12px;font-size:36px;letter-spacing:-2px;font-weight:750;padding:0 14px}.brand-mark{display:flex;align-items:center;justify-content:center;background:var(--orange);color:white;border-radius:13px;width:40px;height:42px;font-size:36px;position:relative;line-height:1;letter-spacing:-5px;padding-bottom:7px;padding-right:7px}.brand-mark span{position:absolute;top:-4px;right:7px;font-size:26px}.brand-dot{color:var(--orange)}.subject{display:flex;align-items:center;gap:11px;background:#f7f8f3;border:1px solid var(--line);border-radius:12px;padding:14px 12px;margin-top:37px}.subject-icon{color:var(--green);font-size:30px}.subject strong,.subject small{display:block}.subject strong{font-size:15px;font-weight:600}.subject small{font-size:12px;color:var(--muted);margin-top:4px}.subject-arrow{margin-left:auto;color:var(--muted)}.nav-caption{font-size:11px;letter-spacing:1.7px;color:#a2a398;margin:31px 13px 13px}nav{display:grid;gap:6px}nav a{display:flex;align-items:center;gap:13px;padding:13px;border-radius:9px;font-size:14px;color:#777e75;font-weight:500}nav a i{color:#8c9588}nav a.active{background:#fceee5;color:#bd6037}nav a.active i{color:var(--orange)}nav a:hover{background:#f6f6f0}nav a span{margin-left:auto;font-size:12px;background:#e8ebe3;padding:2px 5px;border-radius:4px}.sidebar-bottom{margin-top:auto}.growth{height:117px;background:#f5f7ef;border-radius:13px;position:relative;padding:20px 14px;margin-bottom:23px;overflow:hidden}.growth span{font-size:13px;line-height:1.8;position:relative;z-index:1}.growth svg{position:absolute;right:0;bottom:0;width:80px}.profile{border:0;border-top:1px solid var(--line);padding:21px 0 0;background:none;display:flex;align-items:center;gap:10px;width:100%;text-align:left}.avatar{display:flex;align-items:center;justify-content:center;flex:none;width:35px;height:35px;background:#eeeade;color:#80775e;border-radius:50%;font-size:15px}.profile strong{font-size:13px;font-weight:550}.profile small{display:block;font-size:11px;color:var(--muted);margin-top:5px}.profile i{margin-left:auto;color:#9a9e95}.workspace{margin-left:246px}.topbar{height:81px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 44px}.breadcrumb{font-size:13px;color:#90958b;display:flex;gap:15px;align-items:center}.breadcrumb strong{color:#525d50;font-weight:500}.breadcrumb span{color:#c5c8bf}.top-actions{display:flex;align-items:center;gap:20px}.local-note{font-size:12px;color:#8b9287;display:flex;align-items:center;gap:7px}.local-note>span{width:6px;height:6px;background:#89a378;border-radius:50%}.help-button{background:none;border:1px solid #d7dbd0;border-radius:50%;width:23px;height:23px;font-size:15px;color:#899080}.small{border:0;width:29px;height:29px;font-size:12px}main{max-width:1340px;margin:auto;padding:38px 44px 28px}.page-intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:27px}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:1.8px;color:#8b9581;margin-bottom:9px}h1{font-size:29px;letter-spacing:-1px;line-height:1.25;font-weight:550;margin:0 0 9px}h1 .wave{font-size:25px;margin-left:8px}p{line-height:1.7}.subtitle{font-size:14px;color:#909489;margin:0}.date-pill{border:1px solid var(--line);background:#fff;padding:11px 14px;border-radius:8px;font-size:12px;display:flex;align-items:center;gap:8px;color:#7f8979}.date-pill i svg{width:14px;height:14px}.hero{background:#edf1e5;border:1px solid #e5e9dc;border-radius:18px;min-height:250px;display:flex;position:relative;overflow:hidden;padding:31px 33px}.hero-copy{position:relative;z-index:1;max-width:58%}.hero-label{font-size:11px;letter-spacing:1.6px;color:#6e815e;display:flex;gap:7px;align-items:center;font-weight:550}.hero-label span{height:6px;width:6px;background:#86a06d;border-radius:50%}.hero h2{font-size:32px;line-height:1.24;letter-spacing:-1.1px;font-weight:550;margin:16px 0 13px}.hero p{font-size:13px;color:#7d8971;max-width:350px;margin:0 0 23px}.btn{border:0;background:var(--orange);color:#fff;padding:12px 18px;border-radius:8px;font-size:13px;font-weight:500;display:inline-flex;gap:18px;align-items:center;justify-content:center;transition:transform .15s,background .15s}.btn:hover{background:#d96e40;transform:translateY(-1px)}.btn.secondary{background:#f2f4ed;color:#52644c}.btn.secondary:hover{background:#e6ebde}.btn.ghost{background:white;color:#66785e;border:1px solid var(--line)}.hero-meta{display:inline-block;margin-left:13px;font-size:11px;color:#8b947d}.hero-art{position:absolute;right:0;top:0;width:46%;height:100%}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:22px 0 30px}.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:17px;display:flex;gap:12px;align-items:center}.stat-icon{width:37px;height:37px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:#f2f4e9;color:#7c9265}.stat:nth-child(2) .stat-icon{background:#fbf0e6;color:#d79c69}.stat:nth-child(3) .stat-icon{background:#eeedf8;color:#9990ba}.stat:nth-child(4) .stat-icon{background:#edf3f5;color:#7a9b9e}.stat strong{font-size:23px;font-weight:550;display:block;letter-spacing:-.7px}.stat strong small{font-size:13px;color:#a0a497;font-weight:400;letter-spacing:0}.stat label{display:block;font-size:11px;color:#969b8f;margin-top:4px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 17px}.section-heading h2{font-size:19px;letter-spacing:-.35px;font-weight:550;margin:0;display:flex;gap:9px;align-items:center}.section-heading h2 small{font-size:12px;color:#959b8b;font-weight:400;padding:3px 6px;background:#eeefe8;border-radius:4px}.text-link{border:0;background:none;font-size:12px;color:#849071;cursor:pointer;padding:5px}.content-grid{display:grid;grid-template-columns:1fr 295px;gap:22px}.plan-list{display:grid;gap:10px}.plan-item{background:white;border:1px solid var(--line);border-radius:12px;padding:17px;display:flex;gap:13px;align-items:center;text-align:left;width:100%}.plan-item:hover{border-color:#c5d1b6}.lesson-symbol{width:45px;height:45px;border-radius:11px;background:#f0f2e8;color:#839767;display:flex;align-items:center;justify-content:center;flex:none;font-size:24px}.lesson-symbol.peach{background:#fbefe5;color:#c58d62}.lesson-symbol.lilac{background:#f0edf7;color:#a290ba}.item-copy{flex:1}.item-type{font-size:10px;letter-spacing:1px;text-transform:uppercase;color:#919b86;margin-bottom:6px}.item-copy h3{margin:0 0 7px;font-weight:500;font-size:14px}.item-meta{font-size:11px;color:#9a9f93;display:flex;align-items:center;gap:8px}.item-meta .dot{width:2px;height:2px;border-radius:50%;background:#abb19f}.item-end{font-size:17px;color:#9ea78f}.tag{border:1px solid #e7eade;border-radius:5px;padding:4px 6px;color:#8d987c;font-size:10px;margin-left:auto;white-space:nowrap}.goal-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:22px;text-align:center;height:100%}.goal-head{font-size:14px;font-weight:500;text-align:left;display:flex;justify-content:space-between}.goal-head span{color:#a4aa9b}.ring{width:132px;height:132px;position:relative;margin:18px auto 11px}.ring svg{width:100%;height:100%;transform:rotate(-90deg)}.ring-copy{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column}.ring-copy strong{font-size:30px;font-weight:500;letter-spacing:-1px}.ring-copy span{font-size:10px;color:#9ba28e;margin-top:5px}.goal-card p{font-size:12px;color:#929987;max-width:180px;margin:8px auto 17px}.goal-bottom{border-top:1px solid var(--line);padding-top:15px;display:flex;align-items:center;gap:9px;text-align:left;font-size:11px;color:#89947a}.goal-bottom i{color:#d3ab68}.discover{margin-top:30px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.topic-card{border:1px solid var(--line);border-radius:12px;background:white;padding:18px;position:relative;overflow:hidden;text-align:left;cursor:pointer;min-height:149px}.topic-card:hover{border-color:#becbad}.topic-card .topic-icon{font-size:29px;display:block;margin-bottom:17px;color:#8a9c75}.topic-card h3{font-size:14px;font-weight:500;margin:0 0 7px}.topic-card p{font-size:11px;color:#989f8e;margin:0}.topic-card .corner{position:absolute;top:18px;right:18px;font-size:11px;color:#a6ac9b}.topic-card:nth-child(2){background:#fcfaf6}.topic-card:nth-child(3){background:#faf9fc}.welcome-strip{display:flex;align-items:center;gap:12px;margin-top:25px;padding:15px 17px;background:#f1f2ea;border-radius:9px;font-size:12px;color:#839075}.welcome-strip strong{font-weight:500;color:#667657}.welcome-strip i{color:#8e9e7b}.welcome-strip a{margin-left:auto;white-space:nowrap}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lesson-card{border:1px solid var(--line);border-radius:14px;background:white;padding:23px;display:flex;flex-direction:column;align-items:flex-start;min-height:245px}.lesson-card h2{font-size:19px;line-height:1.4;font-weight:500;margin:17px 0 6px}.lesson-card p{font-size:14px;color:#8d9586;flex:1}.lesson-card .btn{margin-top:12px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.filter{border:1px solid var(--line);background:white;border-radius:7px;padding:10px 13px;font-size:13px}.filter.active{background:var(--ink);color:white;border-color:var(--ink)}.empty-state{background:white;border:1px solid var(--line);padding:55px 25px;text-align:center;border-radius:15px}.empty-state h2{font-weight:500;font-size:24px}.empty-state p{color:#89937f;font-size:15px;max-width:450px;margin:15px auto 25px}.progress-table{background:white;border:1px solid var(--line);border-radius:12px;overflow:hidden}.progress-row{display:grid;grid-template-columns:1fr 100px 140px;gap:20px;padding:19px 22px;border-bottom:1px solid var(--line);align-items:center;font-size:14px}.progress-row:last-child{border-bottom:0}.progress-row span{color:#8b9580;font-size:12px}.bar{background:#ecefe5;height:5px;border-radius:5px;overflow:hidden;margin-bottom:7px}.bar>div{height:100%;background:#8aa475}.callout{background:#edf2e6;border:1px solid #dfe6d4;border-radius:10px;padding:18px;font-size:14px;line-height:1.7;color:#6f7f62;margin:20px 0}.mistake-row{background:white;border:1px solid var(--line);padding:20px;border-radius:11px;margin-bottom:12px}.mistake-row h3{font-size:16px;line-height:1.6;font-weight:500}.mistake-row p{font-size:14px;color:#8a9380}footer{max-width:1340px;margin:10px auto 0;padding:22px 44px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:11px;color:#9a9f91;gap:15px}footer a{margin-left:15px}dialog{border:1px solid var(--line);border-radius:20px;padding:0;max-width:740px;width:calc(100% - 30px);max-height:90dvh;color:var(--ink);background:var(--bg)}dialog::backdrop{background:#20312588;backdrop-filter:blur(4px)}.modal-header{padding:22px 28px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#8b957e;gap:12px}.close{border:0;background:#e9ede2;border-radius:50%;width:30px;height:30px;font-size:22px;flex:none}.modal-body{padding:28px}.modal-body h2{font-size:25px;letter-spacing:-.6px;font-weight:550;line-height:1.4;margin:0 0 20px}.modal-body h3{font-size:17px;font-weight:550;margin-top:26px}.modal-body p{font-size:16px;color:#707e66}.quiz-progress{height:4px;background:#e7ebdf}.quiz-progress>div{background:var(--orange);height:100%;transition:width .2s}.question-label{font-size:12px;color:#8d9b7e;letter-spacing:.6px;margin-bottom:17px}.answers{display:grid;gap:10px;margin:24px 0}.answer{background:white;border:1px solid #e0e5d6;border-radius:9px;padding:16px;text-align:left;font-size:15px;line-height:1.5;display:flex;align-items:center;gap:12px}.answer>span{width:25px;height:25px;border-radius:6px;background:#f0f2ea;display:flex;align-items:center;justify-content:center;color:#8f9a80;font-size:12px;flex:none}.answer.selected{border-color:var(--orange);background:#fff5ed}.answer.correct{border-color:#8aa876;background:#eef5e8}.answer.wrong{border-color:#d69c88;background:#fbeee7}.answer:disabled{color:var(--ink);cursor:default;opacity:1}.feedback{border-radius:10px;padding:18px;background:#eef3e6;margin:18px 0;font-size:15px;line-height:1.7}.feedback.wrong{background:#f8eee5}.feedback strong{display:block;margin-bottom:6px}.quiz-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.quiz-actions small{font-size:12px;color:#8e9881}.result-score{font-size:65px;letter-spacing:-3px;font-weight:550;margin:20px 0;color:#6a8758}.result-score small{font-size:25px;color:#a5ae99;letter-spacing:0}.form-row{display:grid;gap:8px;margin:20px 0;font-size:14px}.form-row input{padding:12px;border:1px solid #dae1cf;border-radius:8px;background:white;color:var(--ink);width:100%}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,15px);background:#2c3d2c;color:white;font-size:14px;padding:14px 22px;border-radius:9px;opacity:0;pointer-events:none;transition:.2s;z-index:20}#toast.show{opacity:1;transform:translate(-50%,0)}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1500px){main{padding-top:45px}.hero{min-height:280px}.hero h2{font-size:38px}.hero-copy{padding-top:5px}.content-grid{grid-template-columns:1fr 330px}.plan-item{padding:20px}.hero-art{width:45%}}
@media(max-width:1150px){.sidebar{width:210px;padding:28px 16px}.workspace{margin-left:210px}main{padding:28px}.topbar{padding:0 28px}.content-grid{grid-template-columns:1fr 255px}.hero h2{font-size:28px}.hero{padding:25px}.stat{padding:12px;gap:8px}.stat-icon{width:31px;height:31px}.stat strong{font-size:20px}.stat label{font-size:10px}.hero-meta{display:block;margin:12px 0 0}.lesson-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.sidebar{width:180px;padding:25px 11px}.workspace{margin-left:180px}nav a{font-size:13px;gap:9px}.subject{padding:10px}.brand{font-size:30px}.growth{padding:15px 10px}.growth svg{opacity:.5}.profile small{font-size:10px}.local-note{display:none}main{padding:26px 22px}.topbar{height:67px;padding:0 22px}.content-grid{grid-template-columns:1fr}.goal-card{display:none}.hero-art{opacity:.75;right:-25px;width:47%}.hero-copy{max-width:65%}.hero h2{font-size:27px}.stats{gap:8px}.stat{display:block}.stat-icon{width:27px;height:27px;margin-bottom:9px}.topic-grid{gap:10px}.topic-card{padding:15px}.topic-card h3{font-size:13px}.date-pill{font-size:11px}footer{padding:20px 22px}.tag{display:none}}
@media(max-width:620px){.sidebar{width:auto;inset:auto 0 0;height:68px;border-top:1px solid var(--line);border-right:0;background:#fffffff5;padding:4px 5px 6px;backdrop-filter:blur(10px)}.brand,.subject,.nav-caption,.sidebar-bottom{display:none}nav{display:flex;justify-content:space-around;gap:0;height:100%}nav a{flex-direction:column;justify-content:center;gap:4px;font-size:10px;padding:5px 7px;min-width:55px;border-radius:7px}nav a span{display:none}nav a i svg{width:19px;height:19px}.workspace{margin-left:0}.topbar{height:60px;padding:0 20px}.breadcrumb{font-size:12px;gap:10px}.top-actions{gap:13px}main{padding:25px 18px 20px}.page-intro{margin-bottom:21px}.date-pill{display:none}h1{font-size:25px}.subtitle{font-size:13px}.hero{padding:24px 22px;min-height:290px;border-radius:14px}.hero-copy{max-width:90%}.hero h2{font-size:29px;max-width:250px}.hero p{max-width:240px;font-size:13px}.hero-art{width:190px;height:190px;top:auto;bottom:-34px;right:-40px;opacity:.35}.hero-label{font-size:10px}.hero .btn{position:relative;z-index:1}.hero-meta{font-size:11px}.stats{grid-template-columns:repeat(2,1fr);margin:15px 0 26px;gap:9px}.stat{display:flex;padding:14px;gap:11px}.stat-icon{margin:0;width:33px;height:33px}.stat strong{font-size:22px}.stat label{font-size:11px}.section-heading h2{font-size:18px}.text-link{font-size:11px}.content-grid{gap:0}.plan-item{padding:14px 12px;gap:11px}.lesson-symbol{width:39px;height:43px}.item-copy h3{font-size:13px}.item-meta{font-size:10px}.item-type{font-size:9px}.topic-grid{grid-template-columns:1fr}.topic-card{min-height:97px;padding:20px 20px 20px 80px}.topic-card .topic-icon{position:absolute;left:22px;top:26px;font-size:30px;margin:0}.topic-card h3{font-size:15px}.topic-card p{font-size:12px}.topic-card .corner{top:22px}.welcome-strip{align-items:flex-start;font-size:11px;line-height:1.7}.welcome-strip a{display:none}footer{flex-direction:column;padding:20px 18px 90px;font-size:10px;gap:8px}.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:220px}.progress-row{grid-template-columns:1fr 55px 80px;gap:10px;padding:17px 12px;font-size:13px}.progress-row span{font-size:11px}.modal-body{padding:22px}.modal-body h2{font-size:24px}.modal-header{padding:17px 22px}.quiz-actions{align-items:flex-start}.quiz-actions small{max-width:140px;line-height:1.5}.btn{padding:12px 15px}.answer{font-size:14px;padding:13px}dialog{max-height:92dvh}.lesson-card h2{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Демоверсии и пошаговый решатель */
.solver-banner{background:#edf2e6;border:1px solid #e0e7d5;padding:22px 25px;border-radius:13px;display:flex;justify-content:space-between;align-items:center;gap:20px}.solver-banner>div{display:flex;align-items:center;gap:17px}.solver-banner i{color:#829d68}.solver-banner i svg{width:30px;height:30px}.solver-banner strong{font-size:16px;font-weight:550}.solver-banner p{font-size:12px;color:#829074;margin:7px 0 0}.solver-toolbar{display:flex;align-items:flex-end;gap:16px;margin:24px 0 16px}.solver-toolbar label{display:grid;gap:9px;font-size:12px;flex:1}.solver-toolbar select,.solver-filter-label select{width:100%;background:#fff;border:1px solid #dfe5d6;border-radius:8px;padding:13px;color:var(--ink);font:inherit}.solver-notice{font-size:12px;line-height:1.8;color:#8a9380}.solver-notice a{text-decoration:underline}.solver-summary{display:flex;align-items:center;gap:25px;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:22px 0;padding:17px 0;font-size:12px;color:#8c9581}.solver-summary strong{color:var(--ink);font-size:20px;font-weight:550;margin-right:5px}.solver-summary>span:last-child{margin-left:auto;font-size:10px}.solver-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:22px;align-items:start}.solver-index{background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px;position:sticky;top:20px}.solver-filter-label{display:grid;gap:8px;font-size:11px;color:#8a947f}.solver-filter-label select{font-size:11px;padding:10px}.solver-numbers{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:18px 0}.number-button{position:relative;border:1px solid #e4e8dc;border-radius:7px;height:38px;background:#fafbf7;font-size:13px}.number-button.current{border:2px solid var(--orange);background:#fff3e9}.number-button.solved{background:#eaf2e2;color:#5b7d42}.number-button.missed{background:#fcf0e9;color:#b47254}.number-button.viewed{background:#eff0f7;color:#9094ae}.number-button small{position:absolute;right:3px;top:1px;font-size:9px}.solver-legend{display:flex;flex-wrap:wrap;font-size:10px;color:#87927a;gap:9px}.solver-help{font-size:11px!important;color:#929a88!important;line-height:1.8}.solver-task{padding:29px;background:#fff;border:1px solid var(--line);border-radius:14px;min-width:0}.solver-task-top{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:9px;letter-spacing:.6px;color:#8d9a80}.solver-task h2{font-size:25px;letter-spacing:-.5px;font-weight:550;line-height:1.4;margin:20px 0 10px;scroll-margin-top:25px}.solver-topic{font-size:12px;color:#81916f}.solver-variant{font-size:10px;background:#f5f2e9;border-radius:5px;padding:7px 10px;display:inline-block;margin-top:15px;color:#9d926e}.solver-prompt{font-size:14px;line-height:1.85;white-space:pre-line}.solver-source{display:flex;align-items:flex-start;gap:10px;padding:14px;background:#f5f6ef;border-radius:8px;font-size:11px;line-height:1.8;color:#8b957f;margin:20px 0}.solver-source i{flex:none}.solver-task textarea{font:inherit;line-height:1.7;color:var(--ink);padding:15px;resize:vertical;border:1px solid #dce3d1;border-radius:8px;min-height:160px;width:100%;background:#fdfefa}.solver-task textarea:focus-visible{outline:3px solid #e9a17b;outline-offset:3px}.solver-task .form-row{font-size:13px}.solver-tools{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}.solver-tools button{font-size:12px}button:disabled{cursor:default;opacity:.5;transform:none}.solver-solution,.solver-hints{border-top:1px solid var(--line);margin-top:25px;padding-top:25px}.solver-solution h3,.solver-hints h3{font-size:17px;font-weight:550}.solver-solution ol,.solver-hints ol{padding-left:22px}.solver-solution li,.solver-hints li{padding:0 0 13px 6px;font-size:14px;line-height:1.85;color:#64755a;white-space:pre-line}.solver-key{display:flex;align-items:center;gap:15px;background:#eff5e9;border-radius:9px;padding:17px;color:#698054;flex-wrap:wrap}.solver-key span{font-size:12px}.solver-key strong{font-size:21px;overflow-wrap:anywhere}.model-answer{white-space:pre-line;font-size:14px;line-height:1.85;color:#68785e}.solver-criteria{display:grid;gap:12px;margin:20px 0}.solver-criteria label{display:flex;gap:10px;font-size:13px;line-height:1.7;align-items:flex-start}.solver-criteria input{accent-color:#77965e;margin-top:5px;width:16px;height:16px;flex:none}.solver-task-nav{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:25px;padding-top:22px}.solver-task-nav>span{font-size:11px;color:#97a08c}.solver-books{margin-top:40px;scroll-margin-top:25px}.solver-book-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:18px}.solver-book{padding:24px;background:#fff;border:1px solid var(--line);border-radius:13px;display:flex;gap:20px}.book-cover{width:105px;min-width:105px;background:#e8efdf;border-radius:4px 10px 10px 4px;border-left:6px solid #bdcdae;padding:17px 10px;display:flex;flex-direction:column;justify-content:space-between;color:#6c8656;min-height:175px}.book-cover.peach{background:#f6e9d9;border-color:#e4c9a9;color:#a78761}.book-cover span{font-size:10px}.book-cover b{font-size:27px;line-height:1.4}.book-cover strong{font-size:11px;letter-spacing:1px}.solver-book h3{font-size:14px;line-height:1.6;font-weight:550;margin:10px 0}.solver-book p{font-size:11px;color:#8b9580}.solver-book .text-link{display:block;padding:12px 0 0}.catalog-label{font-size:9px;color:#9e9b8b;background:#f6f5ef;display:inline-block;padding:6px 8px;border-radius:5px}.no-tasks{grid-column:1/-1;font-size:12px;color:#8c9580;line-height:1.7}
@media(max-width:1150px){.solver-layout{grid-template-columns:190px minmax(0,1fr);gap:15px}.solver-index{padding:15px}.solver-task{padding:23px}.solver-book{padding:18px;gap:12px}.book-cover{width:80px;min-width:80px}.book-cover strong{font-size:9px}.solver-book-grid{gap:12px}}
@media(max-width:900px){.solver-layout{grid-template-columns:1fr}.solver-index{position:static}.solver-numbers{grid-template-columns:repeat(10,1fr)}.solver-legend{display:none}.solver-filter-label{grid-template-columns:75px 1fr;align-items:center}.solver-index>.solver-help{display:none}.solver-book-grid{grid-template-columns:1fr}.solver-summary>span:last-child{margin:0}.solver-banner>div{align-items:flex-start}.solver-banner .text-link{display:none}}
@media(max-width:620px){nav a{min-width:0;flex:1;font-size:9px;text-align:center;padding:5px 2px}.solver-banner{padding:18px}.solver-banner strong{font-size:14px}.solver-banner p{font-size:11px}.solver-banner i svg{width:23px;height:23px}.solver-toolbar{align-items:stretch;flex-direction:column;gap:10px}.solver-toolbar select{font-size:12px}.source-link{align-self:flex-start;font-size:11px}.solver-notice{font-size:11px}.solver-summary{gap:12px 20px}.solver-summary>span{font-size:10px}.solver-summary strong{font-size:18px}.solver-index{padding:15px}.solver-numbers{grid-template-columns:repeat(7,1fr);gap:7px;margin-bottom:0}.solver-task{padding:20px 17px}.solver-task h2{font-size:23px}.solver-task-top{font-size:8px;letter-spacing:.2px}.solver-prompt{font-size:14px}.solver-tools{flex-direction:column;align-items:stretch}.solver-task-nav .btn{font-size:10px;padding:11px}.solver-task-nav{gap:7px}.solver-task-nav>span{font-size:9px;white-space:nowrap}.solver-book{padding:18px 15px}.solver-book h3{font-size:13px}.solver-books .section-heading{align-items:flex-start;gap:10px}.solver-books .text-link{font-size:9px}.solver-book .text-link{font-size:11px}.solver-solution li,.solver-hints li{font-size:13px}}

.review-controls,.explanation{margin:24px 0;padding:22px;border:1px solid #dce5da;border-radius:18px;background:#f6f8f2}.review-controls h3,.explanation h3{margin:0 0 12px}.explanation-levels{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.explanation p,.solver-review-list>p{line-height:1.7}.explanation details{margin-top:16px}.explanation summary{cursor:pointer;font-weight:600;line-height:1.6}.solver-review-list{margin:24px 0 40px}.review-controls textarea{box-sizing:border-box;width:100%}@media(max-width:620px){.review-controls,.explanation{padding:16px}.explanation-levels .btn{padding:10px;font-size:14px}}