@charset "UTF-8";
:root{font-family:"Segoe UI",Arial,sans-serif;color:#243b32;background:#f6f7f2;font-synthesis:none;--ink:#243b32;--muted:#6a786f;--green:#2c5a48;--line:#e1e6dc;--lime:#e2efbb}
*{box-sizing:border-box}body{margin:0}button,textarea{font:inherit}button,a,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #93aa67;outline-offset:4px}a{color:inherit}button{transition:background .15s,transform .15s}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}
.topbar{height:92px;padding:0 5.2%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:18px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-weight:700;font-size:20px;letter-spacing:-.4px}.brand-icon{font-size:31px;line-height:40px;width:43px;height:43px;text-align:center;background:var(--green);color:#e9f4d0;border-radius:13px;font-weight:800}.brand-icon span{color:#cde48a}.brand-slash{color:#a6b2a4;font-weight:400;margin:0 5px}.brand-light{font-weight:400}.top-actions{display:flex;align-items:center;gap:26px}.offline{font-size:12px;color:var(--muted);display:flex;gap:8px;align-items:center}.offline>span{width:6px;height:6px;border-radius:50%;background:#789653}.secondary{background:transparent;border:1px solid #cbd5c7;border-radius:9px;padding:10px 15px;font-size:13px;font-weight:600}.secondary:hover{background:#e9eee2}.secondary>span{margin-left:12px}
.shell{max-width:1110px;margin:0 auto;padding:43px 28px 32px}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:35px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:700;color:#708467;margin:0 0 12px}h1{font-size:43px;letter-spacing:-1.7px;font-weight:650;line-height:1.15;margin:0 0 12px}.subtitle{font-size:14px;margin:0;color:var(--muted)}.session-note{display:flex;flex-direction:column;align-items:flex-end;gap:3px;color:var(--muted);font-size:11px}.session-note strong{color:var(--ink);font-size:42px;font-weight:500;line-height:1.2;letter-spacing:-2px}.session-note strong span{font-size:15px;letter-spacing:0;padding-left:7px}.layout{display:grid;grid-template-columns:204px minmax(0,1fr);gap:31px}.sidebar{padding-top:7px}.nav-label{font-size:10px;letter-spacing:1.6px;color:#83917f;margin:0 0 14px 12px;font-weight:700}nav{display:flex;flex-direction:column;gap:4px}.topic-button{border:0;background:transparent;border-radius:10px;display:flex;align-items:center;width:100%;padding:12px 13px;color:#647266;font-size:13px;gap:12px;text-align:left}.topic-button:hover{background:#edf0e6}.topic-button[aria-pressed=true]{background:#e5ecd9;color:#304c36;font-weight:650}.topic-symbol{font-family:Consolas,monospace;display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;font-size:15px}.topic-count{margin-left:auto;font-size:10px;color:#738467;letter-spacing:.2px}.side-note{margin:31px 10px 14px;border-top:1px solid var(--line);padding-top:20px}.small-spark{display:block;font-size:28px;color:#839c5b;margin-bottom:7px}.side-note strong{font-size:12px;font-weight:600}.side-note p{font-size:12px;line-height:1.65;color:var(--muted);margin:7px 0}.text-button{background:none;border:0;padding:8px 0;color:#66755f;font-size:12px}.text-button:hover{text-decoration:underline}.method-link{margin-left:10px;font-size:11px}.workspace{min-width:0}.question-card{background:#fff;border:1px solid #e0e6da;border-radius:20px;padding:29px 33px 26px;box-shadow:0 8px 32px #2a47200a;min-height:445px}.card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.topic-tag{font-size:11px;color:#638246;padding:5px 9px;border-radius:6px;background:#eff5e4;font-weight:600}.question-number{font-size:11px;color:#83917c;font-variant-numeric:tabular-nums}.progress-line{width:100%;height:3px;margin-bottom:25px;accent-color:#85a45e;appearance:none;display:block;border:0;border-radius:3px;overflow:hidden;background:#eef1e9}.progress-line::-webkit-progress-bar{background:#eef1e9}.progress-line::-webkit-progress-value{background:#85a45e}.progress-line::-moz-progress-bar{background:#85a45e}.question-title{font-size:23px;line-height:1.3;letter-spacing:-.5px;font-weight:600;margin:0 0 20px}.code-panel{background:#213a32;border-radius:11px;overflow:hidden;margin:0 0 22px;color:#eef6e9}.code-title{border-bottom:1px solid #ffffff13;font-size:9px;letter-spacing:1px;color:#9db3a3;padding:10px 17px;display:flex;align-items:center;justify-content:space-between}.code-dots{letter-spacing:3px;color:#6e8d7a}.code-panel pre{padding:16px 19px 18px;margin:0;overflow:auto;font:15px/1.65 Consolas,"Courier New",monospace;tab-size:4}.tok-string{color:#dce8a4}.tok-number{color:#e4c58e}.tok-keyword{color:#aacddd}.tok-comment{color:#8da291}.answer-label-row{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:9px}.answer-label-row label{font-size:12px;font-weight:600}.hint-toggle{border:none;background:none;font-size:11px;color:#78866e;padding:0}.hint-toggle:hover{color:#2c5a48;text-decoration:underline}.hint{padding:11px 13px;background:#f6f4e9;border-left:3px solid #d0c587;font-size:12px;line-height:1.6;border-radius:4px;margin-bottom:12px;color:#766739}.answer-input{display:block;resize:vertical;min-height:64px;max-height:180px;width:100%;background:#fafbf8;border:1px solid #dce4d5;border-radius:9px;padding:15px;color:var(--ink);font:16px/1.45 Consolas,"Courier New",monospace;outline:none;transition:border .15s,box-shadow .15s}.answer-input::placeholder{font-family:"Segoe UI",sans-serif;font-size:12px;color:#a3ada0}.answer-input:focus{border-color:#759163;box-shadow:0 0 0 3px #859c6320}.answer-input:disabled{opacity:.7}.format-note{font-size:10px;color:#8a9584;margin:8px 0 0}.actions{margin-top:21px;display:flex;align-items:center;gap:19px}.primary{background:var(--green);color:white;border:1px solid var(--green);border-radius:9px;padding:12px 22px;font-size:13px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:27px}.primary:hover{background:#234b3b}.shortcut{margin-left:auto;font-size:10px;color:#9aa391}.shortcut kbd{font:10px "Segoe UI",sans-serif}.feedback{border:1px solid #d9e6c6;background:#f1f7e9;border-radius:10px;padding:15px 17px;margin-top:18px}.feedback.wrong{background:#fcf3e8;border-color:#eddcc2}.feedback.assisted{background:#f5f4e9;border-color:#e5e0c5}.feedback-title{font-weight:650;font-size:14px;margin:0 0 7px}.feedback p{font-size:12px;line-height:1.65;margin:5px 0}.correct-answer{font:15px/1.5 Consolas,monospace!important;white-space:pre-wrap;color:#3f563b;padding:7px 0}.feedback-small{color:#7c856d;font-size:10px!important}.validation{font-size:12px;color:#946029;margin-top:8px}.under-card{display:flex;justify-content:space-between;gap:15px;margin:15px 4px 0;font-size:10px;color:#8c9684}.page-footer{max-width:1054px;margin:10px auto 0;padding:20px 0 25px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:#8b9783;font-size:10px}.retry-pill{font-size:10px;color:#96753f;margin-left:8px}.finish{text-align:center;padding:15px 4px}.finish-mark{font-size:31px;display:flex;align-items:center;justify-content:center;width:62px;height:62px;background:#e9f1d7;border-radius:50%;margin:0 auto 21px;color:#69894d}.finish h2{font-size:29px;letter-spacing:-.8px;margin:0 0 10px}.finish-lead{font-size:13px;line-height:1.7;color:var(--muted);max-width:420px;margin:0 auto 22px}.result-row{display:flex;justify-content:center;gap:35px;margin:23px 0 29px}.result-stat strong{display:block;font-size:32px;font-weight:500}.result-stat span{font-size:10px;color:var(--muted)}.finish-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.next-review{font-size:11px;color:#7e8c73;margin-top:24px}.finish details{text-align:left;margin:25px 0 0}.finish summary{cursor:pointer;font-size:12px}.review-item{padding:13px 0;border-bottom:1px solid var(--line);font-size:12px;line-height:1.6}.review-item strong{font-size:12px}.review-item code{display:block;font-family:Consolas,monospace;white-space:pre-wrap;margin:6px 0}.review-item p{margin:4px 0;color:var(--muted)}
dialog{width:min(590px,calc(100% - 30px));max-height:85vh;border:1px solid var(--line);border-radius:18px;padding:28px;color:var(--ink);box-shadow:0 20px 100px #0d291b35}dialog::backdrop{background:#1b32266b;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.dialog-head h2{font-size:24px;letter-spacing:-.5px;margin:0}.icon-button{background:#f3f5ee;border:0;width:32px;height:32px;border-radius:50%;font-size:23px;color:#5c705c}.method-list{padding-left:22px;display:grid;gap:15px;font-size:13px;line-height:1.65}.method-list p{margin:4px 0;color:var(--muted)}.method-source{font-size:11px;line-height:1.7;color:var(--muted);margin-top:24px}.source-link{font-size:11px;color:#426b47}.progress-summary{font-size:13px;color:var(--muted);line-height:1.7}.topic-progress{padding:14px 0}.topic-progress-head{display:flex;justify-content:space-between;font-size:12px;margin-bottom:8px}.topic-progress progress{width:100%;height:7px;accent-color:#668750}.legend{font-size:11px;color:var(--muted);line-height:1.6}.empty{padding:20px;text-align:center;color:var(--muted);font-size:13px}.save-warning{color:#93643f!important}
@media(max-width:850px){.offline{display:none}.shell{padding-top:30px}.layout{grid-template-columns:160px minmax(0,1fr);gap:20px}.question-card{padding:23px}.brand{font-size:17px}.topic-button{font-size:12px;padding:11px 9px}.topic-count{display:none}.page-footer{margin:5px 28px 0}.session-note{display:none}h1{font-size:37px}}
@media(max-width:620px){.topbar{height:73px;padding:0 20px}.brand{font-size:15px;gap:9px}.brand-icon{width:33px;height:33px;line-height:30px;font-size:26px;border-radius:10px}.brand-slash{margin:0 1px}.secondary{font-size:11px;padding:9px 11px}.top-actions{gap:0}.shell{padding:26px 17px 24px}.intro{margin-bottom:24px}h1{font-size:32px;letter-spacing:-1.1px}.subtitle{font-size:12px}.eyebrow{font-size:9px}.layout{display:block}.sidebar{padding:0;margin-bottom:18px}.nav-label,.side-note{display:none}nav{flex-direction:row;overflow-x:auto;gap:6px;padding-bottom:7px}.topic-button{width:auto;white-space:nowrap;padding:8px 12px;background:#edf0e6;font-size:11px}.topic-button[aria-pressed=true]{background:#2c5a48;color:white}.topic-symbol{display:none}.method-link{margin:3px 0 0;font-size:10px}.question-card{border-radius:15px;padding:22px 19px;min-height:400px}.question-title{font-size:20px}.code-panel pre{font-size:14px;padding:14px}.actions{gap:14px}.shortcut{display:none}.under-card{font-size:9px;line-height:1.5}.page-footer{margin:0 20px;gap:15px;font-size:9px}.page-footer span:last-child{display:none}.result-row{gap:24px}.finish h2{font-size:24px}.primary{padding:12px 17px;gap:20px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Course and quiz */
:root{--muted:#627164;--line:#dde4d7;--green:#2c5a48;--ink:#243b32}
button,input,textarea{font:inherit}button{touch-action:manipulation}button:disabled{opacity:.65}.shell{max-width:1240px;padding:42px 30px 40px;min-height:calc(100vh - 170px)}.topbar{height:84px}.topbar .offline{font-size:12px}.offline i{width:6px;height:6px;background:#81a058;border-radius:50%}.intro{margin-bottom:28px}.intro h1{font-size:45px;letter-spacing:-1.8px}.intro h1>span{color:#7d9d4d}.subtitle{line-height:1.65;color:#627164}.eyebrow{font-size:10px;line-height:1.6;letter-spacing:1.7px;color:#5d7450}.course-total{text-align:right;display:flex;flex-direction:column;gap:3px}.course-total strong{font-size:44px;line-height:1;font-weight:500;letter-spacing:-2px}.course-total span{font-size:11px;color:var(--muted)}
.skip-link{position:fixed;top:-100px;left:12px;padding:12px;background:#fff;z-index:100}.skip-link:focus{top:12px}.start-banner{background:#e9efdc;border:1px solid #d9e3c7;border-radius:16px;display:flex;align-items:center;gap:21px;padding:23px 27px;margin:0 0 35px}.banner-mark{font-size:46px;color:#6f8d40;line-height:1}.start-banner .eyebrow{margin-bottom:5px;font-size:9px}.start-banner h2{margin:0 0 6px;font-size:21px;letter-spacing:-.4px;font-weight:650}.start-banner p:last-child{font-size:12px;margin:0;color:#66725b}.start-banner .primary{margin-left:auto;flex-shrink:0}.primary{min-height:44px;font-size:13px;gap:16px}.secondary{min-height:40px}.dashboard{display:grid;grid-template-columns:198px minmax(0,1fr);gap:33px}.course-sidebar{padding-top:8px}.nav-label{margin-left:12px;font-size:9px}.course-sidebar>button{display:flex;align-items:center;gap:10px;width:100%;padding:13px 12px;font-size:12px;background:none;border:0;border-radius:9px;text-align:left;color:#647461;margin:3px 0}.course-sidebar>button.side-active{background:#e6ecd9;color:#2f5039;font-weight:650}.course-sidebar small{margin-left:auto}.journey{padding:24px 13px 0;margin-top:12px;border-top:1px solid var(--line)}.journey>span{font-size:11px;color:var(--muted)}.journey strong{display:block;font-size:31px;font-weight:500;margin:10px 0}.journey strong small{font-size:14px;color:#7b8772}.journey progress{height:5px;accent-color:#77984d;width:100%;display:block;border:0}.journey p{font-size:11px;line-height:1.75;color:#65715d;margin-top:15px}.side-note{margin:25px 12px 10px}.side-note>span{font-size:28px;color:#759754;display:block;margin-bottom:9px}.side-note strong{display:block}.course-main{min-width:0}.course-toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:27px}.filter-tabs{display:flex;gap:4px;padding:4px;background:#e9ede2;border-radius:9px}.filter-tabs button{border:none;background:none;padding:8px 12px;font-size:11px;border-radius:6px;color:#65735e;white-space:nowrap;min-height:33px}.filter-tabs button[aria-pressed=true]{background:#fff;box-shadow:0 1px 4px #29431c12;color:#304d36;font-weight:650}.search-box{display:flex;align-items:center;gap:8px;border:1px solid #dbe1d2;padding:8px 11px;border-radius:9px;background:#fafbf7;max-width:194px}.search-box span{font-size:21px;color:#819077}.search-box input{border:0;background:none;outline:0;width:100%;min-width:0;font-size:12px;color:var(--ink)}.search-box:focus-within{outline:2px solid #8aa367;outline-offset:2px}.search-box input::placeholder{color:#798570}.section-heading{display:flex;align-items:center;gap:12px;margin:0 0 17px}.section-heading h2{font-size:20px;font-weight:650;margin:0 0 3px;letter-spacing:-.5px}.section-heading p{font-size:11px;color:var(--muted);margin:0}.section-number{width:34px;height:34px;border:1px solid #d4dec7;border-radius:10px;display:grid;place-items:center;color:#6b8156;font-size:11px}.section-count{margin-left:auto;font-size:10px;color:#748366}.course-section{margin-bottom:32px;--tint:#e9efdd;--accent:#5f7d42}.course-section.blue,.big-topic-icon.blue{--tint:#e7eef3;--accent:#517489}.course-section.purple,.big-topic-icon.purple{--tint:#eeeaf4;--accent:#7a628f}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.topic-card{display:flex;flex-direction:column;background:#fff;border:1px solid #dfe6d9;border-radius:13px;padding:18px 17px 15px;color:var(--ink);text-align:left;min-height:184px;position:relative;box-shadow:0 2px 5px #263f2014}.topic-card:hover{border-color:#9bad8d;box-shadow:0 5px 18px #263f2010;background:#fefefb}.topic-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:13px}.topic-icon{display:flex;align-items:center;justify-content:center;width:33px;height:33px;border-radius:9px;background:var(--tint);color:var(--accent);font:17px Consolas,monospace}.topic-num{color:#85917c;font-size:10px}.topic-card h3{font-size:14px;line-height:1.4;font-weight:650;margin:0 0 7px}.topic-card p{font-size:11px;line-height:1.6;color:#697562;margin:0 0 17px;flex:1}.topic-card-foot{font-size:9px;display:flex;justify-content:space-between;gap:8px;color:#647257}.topic-card-foot b{font-size:14px;margin-left:8px;font-weight:400}.mini-progress{display:flex;gap:4px;margin-top:11px}.mini-progress i{height:3px;border-radius:2px;background:#edf0e8;flex:1}.mini-progress .filled{background:#89a758}.page-footer{max-width:1180px;gap:20px;align-items:center;font-size:10px;margin:0 auto;padding:20px 0;color:#66765f}.page-footer .text-button{font-size:11px}.save-warning{color:#975533!important}
.back-link{border:0;background:none;color:#617352;padding:0 0 23px;font-size:12px;text-align:left;min-height:40px}.back-link:hover{color:#263f20;text-decoration:underline}.topic-intro{display:flex;gap:22px;align-items:center;margin:5px 0 30px}.topic-intro h1{font-size:37px;letter-spacing:-1px;margin-bottom:8px}.big-topic-icon{--tint:#e8eedb;--accent:#678344;width:74px;height:74px;display:grid;place-items:center;background:var(--tint);color:var(--accent);border-radius:19px;font:30px Consolas,monospace;flex-shrink:0}.topic-layout,.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:28px;align-items:start}.level-list{display:grid;gap:15px}.level-card{display:flex;align-items:center;gap:18px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:15px}.level-number{border:1px solid #dce4cf;background:#f5f7f0;flex-shrink:0;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;font-size:16px;color:#7b915d}.level-number.done{background:#e6efcd;color:#4d6c29}.level-info{flex:1;min-width:0}.level-info .eyebrow{font-size:9px;margin-bottom:6px}.level-info h2{font-size:20px;margin:0 0 8px;font-weight:600;letter-spacing:-.4px}.level-info>p:not(.eyebrow){font-size:12px;color:var(--muted);line-height:1.6;margin:0}.level-card>button{flex-shrink:0;padding:11px 17px}.stars{color:#b58b34;letter-spacing:3px;display:block;margin-top:9px}.tip-card{border:1px solid #dce4cc;border-radius:15px;background:#eef2e5;padding:25px}.tip-card>span{font-size:24px;color:#809756}.tip-card h3{font-size:17px;font-weight:600;margin:13px 0}.tip-card p,.tip-card li{font-size:12px;line-height:1.75;color:#626f55}.tip-card small{font-size:11px;line-height:1.7;color:#6c775e;display:block;margin-top:19px}.tip-card ul{padding-left:17px}.tip-card li{margin-bottom:8px}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:33px}.lesson-card h1{font-size:32px;letter-spacing:-.8px;margin:13px 0 20px}.lesson-rule{font-size:16px;line-height:1.8;color:#455b45;margin-bottom:23px}.lesson-takeaway{display:flex;align-items:center;gap:13px;margin:19px 0}.lesson-takeaway>span{font-size:27px;color:#9bb963}.lesson-takeaway p{font-size:12px;line-height:1.7;color:var(--muted);margin:0}.wide-start{margin-top:20px}.mode-picker{padding:18px;border:1px solid #dfe5d8;border-radius:10px;margin:25px 0 0;display:flex;gap:13px 20px;flex-wrap:wrap}.mode-picker legend{font-size:12px;padding:0 6px;font-weight:600}.mode-picker label{display:flex;gap:7px;align-items:center;font-size:12px;cursor:pointer;min-height:32px}.mode-picker input{accent-color:var(--green)}.mode-picker small{font-size:10px;line-height:1.6;color:var(--muted);flex-basis:100%}
.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}.quiz-top .back-link{padding:0}.quiz-top>span{font-size:10px;letter-spacing:1px;color:#708461}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 228px;max-width:1030px;margin:0 auto;gap:28px;align-items:start}.question-card{padding:30px;min-height:0}.question-number{color:#66765b;font-size:11px}.question-heading{display:flex;gap:16px;justify-content:space-between;align-items:flex-start;margin-bottom:22px}.question-heading h1{font-size:25px;line-height:1.4;letter-spacing:-.4px;margin:0;max-width:85%}.attempts{white-space:nowrap;color:#87a653;display:flex;gap:4px;padding-top:5px;font-size:18px}.attempts .spent{color:#d9dfd2}.code-panel{border-radius:12px;margin-bottom:22px}.code-title{color:#b6c9bc;font-size:9px}.code-panel pre{font-size:14px;line-height:1.65;padding:18px 20px;max-height:320px}.answers{padding:0;border:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:11px}.answers legend{font-size:12px;font-weight:600;padding:0 0 12px}.answers legend>span{font-size:10px;color:#77826c;font-weight:400}.answer-option{display:flex;align-items:center;gap:11px;border:1.5px solid #dde5d4;background:#f8faf3;min-height:76px;padding:14px;border-radius:11px;text-align:left;color:#304b36;position:relative}.answer-option.option-1{background:#f4f7fb;border-color:#dce5ed}.answer-option.option-2{background:#faf6ee;border-color:#e9e1d0}.answer-option.option-3{background:#f7f4fa;border-color:#e5dfec}.answer-option:hover:not(:disabled){border-color:#748f5e;box-shadow:0 0 0 2px #829b6720;transform:translateY(-1px)}.answer-letter{display:grid;place-items:center;width:25px;height:25px;flex-shrink:0;border:1px solid #acb89f;border-radius:7px;font-size:10px;color:#6d7f5b;background:#ffffffa8}.answer-text{font:14px/1.5 Consolas,"Segoe UI",monospace;white-space:pre-wrap;overflow-wrap:anywhere}.answer-mark{margin-left:auto;font-size:10px;flex-shrink:0;color:#497437}.answer-option.wrong{border-color:#d9bda9;background:#f9eee6;opacity:1;color:#8c6351}.answer-option.wrong .answer-mark{color:#a45c42;font-size:19px}.answer-option.correct{border-color:#789b45;background:#edf5dc;opacity:1;color:#365124;box-shadow:0 0 0 1px #789b45}.answer-option:disabled:not(.wrong):not(.correct){opacity:.5}.quiz-feedback:empty{display:none}.quiz-feedback{padding:15px 17px;margin-top:18px;border-radius:10px;background:#f7f1e4;border:1px solid #e7d8b7;font-size:13px;outline:none}.quiz-feedback.success{background:#f0f6e3;border-color:#d5e3be}.quiz-feedback.exhausted{background:#f8eee5;border-color:#e8d6c4}.quiz-feedback strong{font-size:14px}.quiz-feedback p{margin:7px 0;font-size:13px;line-height:1.65}.quiz-feedback small{display:block;font-size:11px;color:#6c775e;margin-top:7px}.quiz-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px}.answer-help,.no-timer{font-size:10px;line-height:1.6;color:#748166}.no-timer{white-space:nowrap}.input-label{display:block;font-size:12px;font-weight:600;margin-bottom:10px}.answer-input{min-height:80px}.session-counter{border-bottom:1px solid var(--line);padding:15px 0 23px}.session-counter>strong{display:block;font-size:44px;letter-spacing:-2px;font-weight:500;margin:12px 0 16px}.session-counter>strong small{font-size:17px;letter-spacing:0;color:#8d997e}.question-dots{display:flex;flex-wrap:wrap;gap:7px}.question-dots span{height:29px;width:29px;border-radius:9px;border:1px solid #dce4d3;background:#f2f5eb;display:grid;place-items:center;font-size:10px;color:#7a8769}.question-dots .current{background:#2c5a48;color:#fff;border-color:#2c5a48}.question-dots .done{background:#e5efce;color:#56792e;border-color:#c1d29f}.question-dots .miss{background:#f3e4d6;color:#967050}.session-counter p{font-size:11px;line-height:1.7;color:#6b7860;margin:19px 0 0}.mini-lesson{margin-top:24px}.mini-lesson summary{font-size:12px;font-weight:600;cursor:pointer;color:#546d41;min-height:28px}.mini-lesson p{font-size:12px;line-height:1.8;color:#627557}.mini-lesson .code-panel pre{font-size:11px;padding:12px;white-space:pre-wrap;overflow-wrap:anywhere}.mini-lesson .code-title{padding:8px 12px}.soft-note{font-size:11px;line-height:1.8;color:#748269;margin-top:25px}
.result-card{max-width:780px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;text-align:center;padding:35px}.result-symbol{font-size:42px;color:#7a9c43;margin-bottom:15px}.result-card h1{font-size:34px;letter-spacing:-1px}.result-card .subtitle{max-width:560px;margin:0 auto}.result-stars{font-size:36px;letter-spacing:7px;color:#c5a14e;margin:23px 0}.result-metrics{display:flex;justify-content:center;gap:40px;margin:0 0 28px}.result-metrics strong{display:block;font-size:32px;font-weight:500;letter-spacing:-1px}.result-metrics span{font-size:10px;color:var(--muted)}.result-actions{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}.result-actions .text-button{flex-basis:100%;margin-top:6px}.review-explanations{border-top:1px solid var(--line);margin-top:30px;padding-top:22px;text-align:left}.review-explanations h2{font-size:18px}.review-explanations details{border-bottom:1px solid var(--line);padding:14px 0}.review-explanations summary{font-size:13px;cursor:pointer;line-height:1.7}.review-explanations summary span{color:#7d896e;font-size:11px}.review-explanations p{font-size:13px;line-height:1.6;color:#5e6f55}.review-explanations .code-panel{margin-top:14px}.right-answer b{white-space:pre-wrap}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.review-card{background:#fff;padding:30px;border-radius:16px;border:1px solid var(--line)}.review-card>span{display:block;font-size:32px;color:#7e9b52;margin-bottom:22px}.review-card h2{font-size:20px;font-weight:600}.review-card>strong{font-size:46px;font-weight:500;letter-spacing:-2px}.review-card p{font-size:13px;line-height:1.7;color:var(--muted);min-height:46px;margin-bottom:23px}.review-note{font-size:12px;line-height:1.75;color:#657459;max-width:760px;margin:28px 0}.progress-summary{display:flex;align-items:baseline;gap:15px;margin:0 0 15px}.progress-summary strong{font-size:34px;font-weight:500;letter-spacing:-1px}.progress-summary span{font-size:13px}.progress-numbers{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:14px}.topic-progress>div{display:flex;justify-content:space-between;font-size:13px;gap:10px;margin-bottom:9px}.topic-progress b{font-size:12px}.empty-state{background:#fff;border:1px dashed #cbd6bf;border-radius:14px;text-align:center;padding:40px 20px}.empty-state h2{font-size:22px}.empty-state p{font-size:13px;color:var(--muted);margin-bottom:25px}dialog .actions{flex-wrap:wrap}dialog h2{font-size:22px}.legend{color:#65755c;font-size:12px;line-height:1.75}.method-list{font-size:14px}.method-list p{color:#5f7058}.source-link{font-size:12px}
@media(max-width:1080px){.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard{grid-template-columns:180px minmax(0,1fr);gap:23px}.course-toolbar{gap:10px;align-items:stretch;flex-direction:column}.search-box{max-width:100%;width:100%}.filter-tabs{align-self:flex-start}.level-card{flex-wrap:wrap}.level-card>button{margin-left:58px}.topic-layout,.lesson-layout{grid-template-columns:minmax(0,1fr) 230px}.page-footer{margin:0 30px}.quiz-layout{gap:20px;grid-template-columns:minmax(0,1fr) 205px}.answer-option{padding:12px;gap:9px}.answer-text{font-size:13px}}
@media(max-width:760px){.shell{padding:28px 20px}.intro h1{font-size:35px}.course-total{display:none}.topbar{padding:0 20px;height:74px}.offline{display:none}.dashboard{grid-template-columns:1fr}.course-sidebar{display:flex;gap:8px;padding:0;margin-top:-10px}.course-sidebar>button{width:auto;background:#edf1e5;padding:10px 13px}.course-sidebar .nav-label,.course-sidebar .journey,.course-sidebar .side-note{display:none}.course-toolbar{flex-direction:row;align-items:center}.search-box{width:190px}.filter-tabs button{padding:8px 9px}.topic-layout,.lesson-layout{grid-template-columns:1fr}.topic-layout>.tip-card,.lesson-layout>.tip-card{display:none}.quiz-layout{grid-template-columns:1fr}.quiz-aside{display:block}.session-counter,.soft-note{display:none}.mini-lesson{margin-top:0;background:#edf2e3;border-radius:12px;padding:16px}.mini-lesson .code-panel pre{font-size:13px}.quiz-top>span{display:none}.review-grid{grid-template-columns:1fr}.review-card{padding:24px}.review-card p{min-height:0}.page-footer{flex-wrap:wrap;margin:0 20px;gap:8px 20px}.page-footer span:last-of-type{margin-left:auto}.start-banner{padding:21px;gap:16px}.start-banner h2{font-size:19px}.banner-mark{font-size:38px}.brand{font-size:17px}.brand-icon{font-size:27px}.question-heading h1{font-size:23px}.result-card h1{font-size:30px}}
@media(max-width:480px){.shell{padding:25px 16px}.topbar{padding:0 16px}.brand{font-size:14px;gap:7px}.top-actions .secondary{padding:9px 10px;font-size:11px}.intro{margin-bottom:22px}.intro h1{font-size:32px;line-height:1.2;letter-spacing:-1px}.intro .eyebrow{font-size:8px;letter-spacing:1.3px}.subtitle{font-size:12px}.start-banner{flex-wrap:wrap;padding:19px 17px;margin-bottom:25px;gap:13px}.start-banner>div:nth-child(2){flex:1}.start-banner .primary{width:100%;margin:1px 0 0}.start-banner h2{font-size:18px}.start-banner p:last-child{font-size:11px;line-height:1.5}.banner-mark{font-size:34px}.course-toolbar{flex-direction:column;align-items:stretch;gap:12px;margin-bottom:22px}.filter-tabs{align-self:stretch;justify-content:space-between}.filter-tabs button{flex:1;font-size:11px}.search-box{width:100%;max-width:100%;padding:7px 10px}.topic-grid{gap:10px}.topic-card{padding:14px 12px;min-height:204px}.topic-card h3{font-size:13px}.topic-card p{font-size:11px;margin-bottom:13px}.topic-card-foot{flex-wrap:wrap;font-size:9px;gap:6px}.topic-card-foot b{margin-left:5px}.topic-card-head{margin-bottom:12px}.topic-icon{width:31px;height:31px}.section-heading h2{font-size:19px}.section-heading p{font-size:10px}.section-heading{gap:9px}.section-count{font-size:9px}.section-number{width:29px;height:29px}.course-section{margin-bottom:27px}.topic-intro{gap:14px;margin-bottom:23px}.topic-intro h1{font-size:27px}.big-topic-icon{width:56px;height:56px;border-radius:15px;font-size:25px}.topic-intro .eyebrow{font-size:8px}.level-card{padding:19px 16px;gap:13px}.level-number{width:32px;height:32px}.level-info h2{font-size:19px}.level-card>button{margin-left:45px}.lesson-card{padding:23px 19px}.lesson-card h1{font-size:27px}.lesson-rule{font-size:14px}.question-card{padding:22px 17px}.question-heading{gap:10px}.question-heading h1{font-size:21px;max-width:none;flex:1}.attempts{font-size:15px;padding-top:4px;gap:3px}.code-panel pre{font-size:13px;padding:15px;max-height:300px}.answers{grid-template-columns:1fr;gap:9px}.answer-option{min-height:57px;padding:13px;gap:12px}.answer-text{font-size:14px}.answer-mark{font-size:11px}.quiz-feedback{padding:13px}.quiz-bottom{gap:10px}.quiz-bottom .primary{padding:11px 15px;font-size:12px}.no-timer{font-size:9px}.quiz-top{margin-bottom:16px}.quiz-top .back-link,.quiz-top .text-button{font-size:11px}.result-card{padding:28px 18px}.result-card h1{font-size:27px}.result-metrics{gap:24px}.result-metrics strong{font-size:29px}.result-metrics span{font-size:9px}.result-actions>.primary,.result-actions>.secondary{width:100%}.page-footer{font-size:9px;line-height:1.6;margin:0 16px}.page-footer span:last-of-type{margin-left:0;order:3;width:100%}.page-footer .text-button{margin-left:auto;font-size:10px}.mode-picker{padding:13px;gap:7px}.mode-picker label{width:100%;min-height:36px}}

/* Account and synchronisation */
#account-dialog{max-width:490px;width:calc(100% - 32px)}.login-providers{display:grid;gap:12px;margin:25px 0}.provider-button{display:flex;align-items:center;gap:16px;width:100%;padding:17px 19px;background:white;border:1px solid var(--line,#dce0d9);border-radius:14px;text-align:left;font:inherit;font-weight:650}.provider-button>span:nth-child(2){flex:1}.provider-button small{display:block;font-size:11px;font-weight:400;margin-top:3px}.provider-button:not(:disabled):hover{border-color:#386a49;background:#f4f8f1}.provider-button:disabled{opacity:.5;cursor:not-allowed}.provider-symbol{width:26px;font-size:21px;font-weight:800;text-align:center}.provider-button.google .provider-symbol{color:#4285f4}.provider-button.vk .provider-symbol{color:#0077ff}.account-identity{display:flex;gap:15px;align-items:center;margin:20px 0}.account-identity h3,.account-identity p{margin:4px 0}.account-identity p{font-size:13px;overflow-wrap:anywhere;color:#657064}.account-avatar{display:grid;place-items:center;width:50px;height:50px;border-radius:50%;background:#e6efda;color:#386a49;font-size:22px}.account-status{padding:12px;border-radius:10px;background:#eff5e9;font-size:13px}.guest-transfer{padding:18px;margin:20px 0;border:1px solid #cbdabd;border-radius:14px;background:#f8faf2}.guest-transfer p{font-size:14px;line-height:1.5}.account-delete{display:block;margin-top:24px;color:#884942;font-size:12px}.page-footer a{color:inherit}.top-actions{flex-wrap:wrap}#account-content .subtitle{font-size:16px}