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20px;display:flex}a.lesson-row:hover{background:#f5f8fe}a.lesson-row:focus-visible{outline-offset:-3px}.lesson-marker{color:#7b8a9d;font-variant-numeric:tabular-nums;flex-shrink:0;place-items:center;width:28px;height:28px;font-size:12px;font-weight:550;display:grid}.lesson-marker.completed{color:#197568;background:#e5f4ee;border-radius:50%}.lesson-row-main{flex:1;min-width:0}.lesson-title{font-size:14px;font-weight:550;line-height:1.5;display:block}.lesson-meta{color:var(--color-muted);flex-wrap:wrap;gap:12px;margin-top:5px;font-size:10px;display:flex}.level-label{align-items:center;gap:5px;font-size:10px;display:inline-flex}.level-label>span{background:#197568;border-radius:50%;width:5px;height:5px}.level-standard>span{background:#a27317}.level-challenge>span{background:#9660a7}.lesson-status{color:var(--color-muted);text-align:right;max-width:135px;font-size:10px}.status-next{color:#2859c5;background:#e8effe;border-radius:5px;padding:4px 8px;font-weight:650}.next-row{box-shadow:inset 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#dce4ef;padding:8px 10px;font-size:12px;line-height:1.6;display:block}.lesson-outline nav a:hover{border-color:var(--color-accent);color:var(--color-accent);background:#e8effa}.lesson-article{border:1px solid var(--color-border);background:#fff;border-radius:16px;min-width:0;max-width:820px;padding:36px 40px}.lesson-page-heading{border-bottom:1px solid var(--color-border);margin-bottom:26px;padding-bottom:26px}.lesson-page-heading h1{letter-spacing:-.9px;margin-top:12px;font-size:clamp(26px,3vw,36px);font-weight:750;line-height:1.2}.lesson-block{margin-top:38px}.lesson-block>h2{margin-bottom:18px}.lesson-prose{overflow-wrap:anywhere;font-size:15px;line-height:1.8}.lesson-prose pre{white-space:pre;overflow-wrap:normal}.lesson-prose .code-example{background:#10161f;border-radius:10px;margin-top:20px;margin-bottom:20px;overflow:hidden}.code-toolbar{color:#b5c4da;border-bottom:1px solid #ffffff20;justify-content:space-between;align-items:center;gap:12px;padding:9px 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h1{letter-spacing:-2px;max-width:12ch;font-size:clamp(36px,4.2vw,64px);font-weight:750;line-height:1.06}.login-story h1+p{color:#d7e3ff;max-width:35ch;margin-top:25px;font-size:15px;line-height:1.7}.login-game{flex:1;min-height:210px;position:relative}.login-game .game-scene{width:100%;max-width:400px;height:240px;margin-left:auto}.login-game .pixel-player{width:48px;height:48px}.login-game .scene-caption{display:none}.login-story-footer{color:#cddcff;margin-top:22px;font-size:12px}.login-form-panel{justify-content:center;align-items:center;padding:48px;display:flex}.login-form-inner{width:100%;max-width:360px}.login-form-inner h2{letter-spacing:-.7px;font-size:28px;font-weight:700;line-height:1.2}.login-description{color:var(--color-muted);margin:14px 0 30px;font-size:14px;line-height:1.6}.login-form-inner input{background:#f8fafd;min-height:48px}.login-form-inner form label>span:last-child:not(:first-child){margin-top:10px}.login-help{color:var(--color-muted);border-top:1px solid var(--color-border);text-align:center;margin-top:32px;padding-top:24px;font-size:12px;line-height:1.7}@media (width<=1100px){.header-inner{gap:24px}.course-intro{grid-template-columns:minmax(0,1fr) 220px}.next-lesson .game-scene{width:140px}.next-lesson-copy{padding:26px}.curriculum-layout{grid-template-columns:170px minmax(0,1fr);gap:24px}.lesson-layout{grid-template-columns:190px minmax(0,1fr);gap:24px}.lesson-article{padding:30px}}@media (width<=800px){.header-inner{flex-wrap:wrap;gap:16px;min-height:76px;padding:16px 24px}.main-nav{border-top:1px solid #edf0f6;order:3;width:100%;padding-top:12px}.account-menu{margin-left:auto}.account-name{max-width:140px}.nav-link{padding:8px 12px;font-size:12px}.page-container{padding:30px 24px 48px}.course-heading{align-items:start}.course-heading .text-link{display:none}.course-intro{grid-template-columns:1fr}.next-lesson .game-scene{width:190px}.course-progress{grid-template-columns:1fr auto;align-items:center;gap:0 20px;padding:22px;display:grid}.progress-value{grid-area:1/2/3;margin:0;font-size:36px}.course-progress p{margin-top:3px}.progress-track{grid-column:1/-1;margin-top:18px}.progress-caption{grid-column:1/-1}.curriculum-layout{display:block}.course-outline{display:none}.lesson-layout{display:block}.lesson-outline{max-height:none;margin-bottom:24px;padding:0;position:static}.lesson-outline nav{gap:8px;margin-top:20px;padding:4px 4px 10px;display:flex;overflow-x:auto}.lesson-outline nav .outline-heading{display:none}.lesson-outline nav a{white-space:nowrap;border:1px solid var(--color-border);background:#fff;border-radius:6px}.lesson-article{max-width:none}html{scroll-padding-top:160px}.app-footer{width:calc(100% - 48px)}.login-story{padding:36px}.login-form-panel{padding:32px}.login-story h1{font-size:42px}}@media (width<=600px){.header-inner{padding:14px 18px}.brand{font-size:15px}.brand-symbol{width:34px;height:34px;font-size:27px}.account-name{max-width:95px;font-size:11px}.account-menu{gap:10px}.sign-out{padding-left:10px;font-size:12px}.page-container{padding:26px 16px 40px}.course-heading{margin-bottom:24px}.course-heading h1+p{font-size:13px;line-height:1.6}.next-lesson{min-height:0}.next-lesson-copy{padding:26px 24px}.next-lesson .game-scene{display:none}.next-lesson h2{font-size:27px}.curriculum-heading{flex-wrap:wrap;gap:5px;margin-top:32px}.curriculum-heading h2{font-size:20px}.section-heading h3{font-size:15px}.lesson-row{flex-wrap:wrap;gap:9px;padding:16px 12px}.lesson-marker{width:22px}.lesson-row-main{flex-basis:calc(100% - 50px)}.lesson-title{font-size:13px}.lesson-meta{gap:8px}.lesson-status{text-align:left;max-width:none;margin-left:31px}.lesson-chevron{margin-left:auto;font-size:16px}.section-number{width:36px;height:36px}.lesson-article{border-radius:12px;padding:24px 18px}.lesson-prose{font-size:14px}.lesson-prose pre{font-size:12px}.completion-panel{padding:18px}.app-footer{flex-direction:column;gap:6px;width:calc(100% - 32px)}.login-page{display:block}.login-story{min-height:auto;padding:28px}.login-story-copy{margin-top:34px}.login-story-copy>p:first-child{margin-bottom:12px}.login-story h1{letter-spacing:-1px;max-width:16ch;font-size:36px}.login-story h1+p{margin-top:16px;font-size:13px}.login-game,.login-story-footer{display:none}.login-form-panel{padding:32px 28px 40px}.login-form-inner{max-width:none}.login-form-inner h2{font-size:24px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property 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--tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}