.learning-shell{--lw-bg:#fafafa;--lw-side:#f1f1f1;--lw-panel:#fff;--lw-raised:#ededed;--lw-line:#d5d5d5;--lw-text:#242424;--lw-muted:#626262;--lw-accent:#694ac6;--lw-tint:#f0ebfc;--lw-accent-line:#c6b7e9;--lw-on-accent:#fff;color:var(--lw-text);background:var(--lw-bg);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:18px;line-height:1.6;display:grid;grid-template-columns:244px minmax(0,1fr);height:100dvh;width:100%;text-align:left}
[data-theme=dark] .learning-shell{--lw-bg:#212121;--lw-side:#181818;--lw-panel:#272727;--lw-raised:#303030;--lw-line:#414141;--lw-text:#f2f2f2;--lw-muted:#b7b7b7;--lw-accent:#b7a5ff;--lw-tint:#302a40;--lw-accent-line:#63557e;--lw-on-accent:#241b39}
.learning-shell *{box-sizing:border-box}
.learning-shell h1,.learning-shell h2,.learning-shell h3,.learning-shell p{margin:0;letter-spacing:normal}
.learning-shell h1{font-size:clamp(26px,3vw,36px);line-height:1.22;font-weight:650;margin:24px 0 16px}
.learning-shell h2{font-size:clamp(24px,2.5vw,30px);line-height:1.3;font-weight:650}
.learning-shell h3{font-size:20px;line-height:1.4}
.learning-shell p{margin:14px 0;overflow-wrap:anywhere}
.learning-shell a{color:inherit;text-decoration:none}
.learning-shell button{font:inherit;line-height:1.4;cursor:pointer;margin:0;box-shadow:none;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;border:1px solid transparent;border-radius:12px;padding:10px 14px;color:var(--lw-text);background:transparent;text-decoration:none}
.learning-shell button:disabled{opacity:.55;cursor:default}
.learning-shell button:hover:not(:disabled),.learning-shell .lw-nav:hover{background:var(--lw-raised)}
.learning-shell button:focus-visible,.learning-shell a:focus-visible,.learning-shell summary:focus-visible{outline:3px solid var(--lw-accent);outline-offset:4px}
.learning-shell .lw-primary{background:var(--lw-accent);color:var(--lw-on-accent);border-radius:30px;padding:13px 22px;font-weight:650;min-height:50px}
.learning-shell .lw-primary:hover:not(:disabled){background:var(--lw-accent);filter:brightness(.95)}
.learning-shell .lw-secondary{border-color:var(--lw-line);background:var(--lw-panel)}
.learning-shell svg{flex-shrink:0;width:22px;height:22px}
.learning-shell .lw-quiet{color:var(--lw-muted);text-decoration:underline;text-underline-offset:4px}
.learning-shell .lw-icon{padding:10px;flex-shrink:0;min-width:46px}
.learning-shell .lw-robot{display:block;flex:none;object-fit:contain;width:40px;height:40px}
.learning-shell .lw-sidebar{background:var(--lw-side);border-right:1px solid var(--lw-line);display:flex;flex-direction:column;padding:24px 16px;overflow-y:auto;min-height:0;gap:12px}
.learning-shell .lw-brand{display:flex;gap:10px;align-items:center;font-size:20px;line-height:1.2;font-weight:650;margin-bottom:25px}
.learning-shell .lw-eyebrow{font-size:15px;letter-spacing:.09em;color:var(--lw-muted);font-weight:600;line-height:1.5;margin:0}
.learning-shell .lw-sidebar>.lw-eyebrow{margin-top:28px}
.learning-shell .lw-course-name{font-size:18px;margin:4px 8px 12px}
.learning-shell .lw-navigation{display:grid;gap:8px}
.learning-shell .lw-nav{display:flex;gap:12px;padding:12px;text-align:left;align-items:center;justify-content:flex-start;border-radius:12px;min-height:48px;color:var(--lw-muted);white-space:normal}
.learning-shell [data-learning=continue]{background:var(--lw-raised);color:var(--lw-text)}
.learning-shell .lw-progress{padding:20px 8px;color:var(--lw-muted);font-size:16px}
.learning-shell [role=progressbar]{height:5px;border-radius:9px;overflow:hidden;background:var(--lw-line);margin-top:12px}
.learning-shell [role=progressbar]>span{display:block;height:100%;background:var(--lw-accent)}
.learning-shell .lw-account{margin-top:auto;display:grid;gap:4px;padding-top:28px}
.learning-shell .lw-account p{font-size:15px;color:var(--lw-muted);margin:12px 8px 0}
.learning-shell .lw-main{min-width:0;min-height:0;display:flex;flex-direction:column}
.learning-shell .lw-header{display:flex;align-items:center;gap:16px;min-height:80px;padding:14px 32px;border-bottom:1px solid var(--lw-line);flex-shrink:0;background:var(--lw-bg);position:static}
.learning-shell .lw-header strong{font-size:19px;line-height:1.3;display:block}
.learning-shell .lw-header small{display:block;color:var(--lw-muted);font-size:16px;line-height:1.5;margin-top:4px}
.learning-shell .lw-course-icon{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--lw-accent-line);background:var(--lw-tint);color:var(--lw-accent);border-radius:12px;flex-shrink:0}
.learning-shell .lw-header-actions{margin-left:auto;display:flex;gap:8px}
.learning-shell .lw-scroll{overflow:auto;overscroll-behavior:contain;min-height:0;flex:1;scroll-padding:28px}
.learning-shell .lw-content{max-width:860px;margin:auto;padding:34px 40px 44px}
.learning-shell .lw-task-top{display:flex;justify-content:space-between;gap:12px;align-items:center}
.learning-shell .lw-task-copy{font-size:20px;line-height:1.65;max-width:70ch}
.learning-shell .lw-guide{color:var(--lw-muted);font-size:18px}
.learning-shell .lw-steps{display:flex;gap:12px;list-style:none;padding:0;margin:16px 0 24px}
.learning-shell .lw-steps li{flex:1;color:var(--lw-muted);border-top:3px solid var(--lw-line);padding-top:10px;font-size:16px;display:flex;align-items:center;gap:8px}
.learning-shell .lw-steps li.active{border-color:var(--lw-accent);color:var(--lw-accent)}
.learning-shell .lw-steps span{display:grid;place-items:center;border-radius:50%;width:24px;height:24px;font-size:15px;background:var(--lw-raised)}
.learning-shell details{border:1px solid var(--lw-line);background:var(--lw-panel);border-radius:16px;margin-top:20px;padding:16px 20px}
.learning-shell summary{cursor:pointer;min-height:28px;font-size:18px;font-weight:600;color:var(--lw-text)}
.learning-shell details[open]>summary{margin-bottom:16px}
.learning-shell .lw-example{border-color:var(--lw-accent-line);background:var(--lw-tint)}
.learning-shell .lw-example blockquote{margin:0 0 16px;font-size:20px;line-height:1.6;border:0;padding:0}
.learning-shell .lw-example p{font-size:16px;color:var(--lw-muted);margin-bottom:0}
.learning-shell .lw-source p{font-size:18px}
.learning-shell .lw-conversation{margin-top:32px;display:grid;gap:32px}
.learning-shell .lw-message{min-width:0;overflow-wrap:anywhere}
.learning-shell .lw-message.user{padding:16px 24px;border-radius:24px;background:var(--lw-raised);max-width:92%;justify-self:end}
.learning-shell .lw-message p:first-child{margin-top:0}
.learning-shell .lw-message p:last-child{margin-bottom:0}
.learning-shell .lw-message p,.learning-shell .lw-message li{font-size:20px;line-height:1.7}
.learning-shell .lw-message ul{padding-left:24px;list-style:disc}
.learning-shell .lw-message li+li{margin-top:8px}
.learning-shell .lw-assistant{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.learning-shell .lw-assistant .lw-robot{width:32px;height:32px}
.learning-shell .lw-assistant strong{font-size:18px}
.learning-shell .lw-message button{font-size:16px;margin-top:12px}
.learning-shell pre{white-space:pre-wrap;background:var(--lw-raised);padding:18px;border-radius:10px;font-size:16px;overflow-wrap:anywhere}
.learning-shell .lw-feedback{border:1px solid var(--lw-line);background:var(--lw-panel);padding:28px;border-radius:24px;margin-top:32px;outline:none}
.learning-shell .lw-feedback:focus-visible{outline:3px solid var(--lw-accent);outline-offset:4px}
.learning-shell .lw-achievement{background:var(--lw-tint);border-color:var(--lw-accent-line);box-shadow:0 0 24px color-mix(in srgb,var(--lw-accent) 9%,transparent)}
.learning-shell .lw-trophy{color:var(--lw-accent);display:grid;place-items:center;width:58px;height:58px;border:1px solid var(--lw-accent-line);border-radius:18px;margin-bottom:24px}
.learning-shell .lw-trophy svg{width:32px;height:32px}
.learning-shell .lw-feedback h2{margin-top:12px}
.learning-shell .lw-reuse{border-top:1px solid var(--lw-accent-line);margin-top:24px;padding-top:20px}
.learning-shell .lw-saved{color:var(--lw-accent);display:flex;gap:10px;align-items:center;font-size:16px}
.learning-shell .lw-next{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:24px}
.learning-shell .lw-working{color:var(--lw-muted);padding:12px 0}
.learning-shell .lw-error{border:1px solid var(--lw-accent-line);padding:20px;background:var(--lw-tint);border-radius:16px;margin-top:24px}
.learning-shell .lw-error>div{display:flex;flex-wrap:wrap;gap:12px}
.learning-shell .lw-composer-area{padding:12px 32px 14px;flex-shrink:0;border-top:1px solid var(--lw-line);background:var(--lw-bg)}
.learning-shell .lw-composer-inner{max-width:780px;margin:auto}
.learning-shell .lw-composer-inner>label{display:block;font-size:16px;margin:0 0 8px;color:var(--lw-muted)}
.learning-shell .lw-composer{border:1px solid var(--lw-line);border-radius:22px;background:var(--lw-raised);padding:12px 16px;margin:0;box-shadow:none;display:block}
.learning-shell .lw-composer:focus-within{border-color:var(--lw-accent);box-shadow:0 0 0 1px var(--lw-accent)}
.learning-shell textarea{background:transparent;color:var(--lw-text);font:inherit;font-size:19px;line-height:1.5;display:block;border:0;resize:vertical;width:100%;min-height:58px;max-height:20dvh;padding:0;outline:none!important;border-radius:0;box-shadow:none!important;margin:0}
.learning-shell textarea::placeholder{color:var(--lw-muted);opacity:1}
.learning-shell .lw-composer-controls{display:flex;gap:14px;justify-content:space-between;align-items:center;margin-top:8px}
.learning-shell .lw-composer-controls span{font-size:15px;color:var(--lw-muted)}
.learning-shell .lw-composer-note{font-size:14px;line-height:1.5;text-align:center;color:var(--lw-muted);margin:8px 0 0}
.learning-shell .lw-mobile{display:none}
body.learning-active{overflow:hidden;height:100dvh;margin:0;background:#212121}
body.learning-active>#app,body.learning-active>#main{height:100dvh;width:100%;max-width:none;margin:0;padding:0;display:block}
body.learning-active>.site-header,body.learning-active>footer{display:none}
.lw-help{padding-left:24px}.lw-help li+li{margin-top:22px}
@media(max-width:800px){
 .learning-shell{grid-template-columns:minmax(0,1fr)}
 .learning-shell .lw-sidebar{display:none}
 .learning-shell .lw-mobile{display:inline-flex}
 .learning-shell .lw-header{min-height:72px;padding:10px 12px;gap:8px}
 .learning-shell .lw-header strong{font-size:17px}
 .learning-shell .lw-header small{font-size:14px}
 .learning-shell .lw-course-icon{display:none}
 .learning-shell .lw-header-actions{gap:0}
 .learning-shell .lw-header-actions [data-learning=help]{display:none}
 .learning-shell .lw-content{padding:24px 20px 32px}
 .learning-shell .lw-task-copy,.learning-shell .lw-message p,.learning-shell .lw-message li{font-size:19px}
 .learning-shell .lw-feedback{padding:22px 20px}
 .learning-shell .lw-next{gap:14px;align-items:stretch;flex-direction:column}
 .learning-shell .lw-next .lw-primary{width:100%}
 .learning-shell .lw-composer-area{padding:10px 12px max(10px,env(safe-area-inset-bottom))}
 .learning-shell .lw-composer-inner>label{font-size:15px}
 .learning-shell .lw-composer-controls span{display:none}
 .learning-shell .lw-composer-controls{justify-content:flex-end}
 .learning-shell .lw-composer{padding:10px 14px}
 .learning-shell .lw-composer-note{font-size:13px}
 .learning-shell .lw-message.user{max-width:96%;padding:14px 18px}
}
@media(max-height:550px) and (max-width:800px){
 .learning-shell .lw-header{min-height:54px;padding-block:4px}
 .learning-shell .lw-header small,.learning-shell .lw-composer-note,.learning-shell .lw-composer-inner>label{display:none}
 .learning-shell .lw-composer{display:flex;align-items:end;gap:8px;border-radius:16px}
 .learning-shell textarea{max-height:22dvh;min-height:44px}
 .learning-shell .lw-composer-controls{margin:0}
 .learning-shell .lw-composer-controls .lw-primary{min-height:44px;padding:10px 14px}
}
@media(prefers-reduced-motion:reduce){.learning-shell *{scroll-behavior:auto!important;transition:none!important}}

.learning-shell .send-button{width:auto;height:auto;min-width:106px;position:static;transform:none;flex-shrink:0}
.learning-shell .lw-context{white-space:pre-line;padding:18px 20px;background:var(--lw-tint);border-left:3px solid var(--lw-accent);border-radius:0 12px 12px 0;font-size:18px}

.learning-shell .lw-table{overflow-x:auto;margin:20px 0;border:1px solid var(--lw-line);border-radius:12px}.learning-shell .lw-table table{width:100%;border-collapse:collapse;background:var(--lw-panel);font-size:18px}.learning-shell .lw-table th,.learning-shell .lw-table td{border-bottom:1px solid var(--lw-line);padding:12px;text-align:left;min-width:130px}.learning-shell .lw-table th{background:var(--lw-raised)}

.learning-shell{-webkit-font-smoothing:antialiased}.learning-shell strong{font-weight:650}.learning-shell .lw-teaching{font-size:19px;margin-block:24px;color:var(--lw-muted)}