:root{--paper:#FEFDFC;--ink:#171717;--muted:#6e6c68;--line:#dedcd7;--panel:#f2f1ed;--white:#fff;--sidebar:264px;color-scheme:light;font-family:'NB International Pro',Arial,'Noto Sans SC Variable','PingFang SC',sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}button{color:inherit}img,video,svg{max-width:100%}button svg{width:18px;height:18px}p{margin:0}.skip-link{position:fixed;z-index:20;top:-80px;left:16px;background:var(--ink);color:white;padding:14px}.skip-link:focus{top:16px}.boot{min-height:80vh;display:grid;place-content:center;gap:28px;color:var(--muted)}.boot img{margin:auto}::selection{background:#dedbd3}.button{min-height:48px;padding:13px 24px;display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--ink);border-radius:4px;text-decoration:none;background:var(--ink);color:var(--paper);font-size:14px;line-height:1.5}.button:hover{background:#343434}.button.secondary{background:transparent;color:var(--ink);border-color:var(--line)}.button.secondary:hover{border-color:var(--ink)}.text-button{border:0;background:none;padding:10px 0;text-decoration:underline;text-underline-offset:4px;font-size:13px}.quiet-button{border:0;background:none;padding:9px 12px;border-radius:4px;color:var(--muted);font-size:12px;min-height:40px}.quiet-button:hover{background:var(--panel);color:var(--ink)}.eyebrow{font-family:Arial,sans-serif;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}.brand{display:inline-flex;align-items:center;text-decoration:none}.brand img{width:138px;height:42px}.muted{color:var(--muted)}.error{color:#a02c21;font-size:13px;line-height:1.75;min-height:23px}.error:empty{display:none}#toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,16px);background:var(--ink);color:white;border-radius:4px;padding:11px 20px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .15s,transform .15s;z-index:100;max-width:calc(100vw - 32px)}#toast.show{opacity:1;transform:translate(-50%,0)}
/* The entry is a reading invitation, not a shop. */
.entry-header{display:flex;justify-content:space-between;align-items:center;padding:26px 5vw;border-bottom:1px solid var(--line)}.entry-header>span{font-size:11px;color:var(--muted);letter-spacing:.08em}.entry-main{min-height:calc(100svh - 148px);display:grid;grid-template-columns:minmax(420px,1fr) minmax(300px,.82fr);gap:9vw;max-width:1420px;padding:64px 6vw 60px;margin:auto;align-items:center}.entry-copy{max-width:590px}.entry-copy h1{font-weight:400;font-size:clamp(38px,4.2vw,66px);letter-spacing:-.045em;line-height:1.18;margin:25px 0 25px}.entry-copy .intro{font-size:16px;line-height:1.9;color:#55534f;max-width:440px}.entry-meta{margin-top:26px;display:flex;gap:20px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.redeem-form{margin-top:42px;border-top:1px solid var(--line);padding-top:24px;max-width:470px}.redeem-form label{display:block;font-size:13px;margin-bottom:11px}.code-line{display:flex;gap:8px}.code-line input{min-width:0;flex:1;width:0;border:1px solid #c9c6bf;border-radius:4px;background:white;padding:14px;font-family:Arial,sans-serif;font-size:16px;letter-spacing:.03em}.code-line .button{white-space:nowrap;padding-inline:20px}.redeem-form .error{margin-top:10px}.redeem-note{font-size:11px;line-height:1.8;color:var(--muted);margin-top:12px}.entry-visual{position:relative;max-width:430px;justify-self:end;width:100%}.entry-visual img{width:100%;aspect-ratio:3/4;object-fit:cover;display:block}.entry-visual figcaption{display:flex;justify-content:space-between;font-size:10px;line-height:1.6;color:var(--muted);margin-top:12px;gap:15px}.entry-footer{padding:18px 5vw;display:flex;justify-content:space-between;gap:20px;font-size:10px;line-height:1.7;color:var(--muted);border-top:1px solid var(--line)}.entry-visual figure{margin:0}.entry-visual .image-index{position:absolute;top:16px;left:16px;color:white;font-family:Arial;font-size:11px;letter-spacing:.1em;background:#171717aa;padding:7px 9px}
/* Reading workspace */
.topbar{height:84px;position:fixed;left:0;right:0;top:0;background:var(--paper);z-index:15;display:flex;align-items:center;padding:0 32px;border-bottom:1px solid var(--line);gap:30px}.topbar .course-name{font-size:13px;border-left:1px solid var(--line);padding-left:28px}.top-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.menu-toggle{display:none}.sidebar{position:fixed;left:0;top:84px;bottom:0;width:var(--sidebar);border-right:1px solid var(--line);overflow-y:auto;padding:28px 18px 30px 24px;background:var(--paper);z-index:14;scrollbar-width:thin}.sidebar-heading{font-size:11px;letter-spacing:.07em;color:var(--muted);padding:0 12px 10px}.progress-track{height:3px;background:#e5e3de;margin:0 12px 11px;overflow:hidden}.progress-track span{height:100%;display:block;background:var(--ink);width:0;transition:width .18s}.progress-label{font-size:10px;color:var(--muted);padding:0 12px 20px}.nav-group{margin:13px 0 20px}.nav-group h2{font-size:11px;font-weight:400;color:var(--muted);padding:0 12px;margin:0 0 8px;letter-spacing:.03em}.nav-step{width:100%;border:0;border-radius:3px;background:none;text-align:left;display:flex;align-items:flex-start;gap:9px;padding:10px 12px;font-size:12px;line-height:1.6;min-height:40px;color:#595753}.nav-step:hover{background:var(--panel)}.nav-step.active{background:var(--ink);color:var(--paper)}.nav-step .step-dot{font-family:Arial;font-size:10px;opacity:.65;min-width:17px;margin-top:2px}.nav-step .done-dot{opacity:1}.reader{margin-left:var(--sidebar);padding:132px max(42px,6vw) 125px;max-width:1350px}.lesson-header{max-width:790px;margin:0 auto 36px}.lesson-kicker{display:flex;gap:18px;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:22px}.lesson-header h1{font-weight:400;font-size:clamp(28px,3vw,43px);letter-spacing:-.035em;line-height:1.35;margin:0 0 20px;outline:none}.lesson-intro{font-size:17px;line-height:1.9;color:#514f4b;max-width:720px}.where{display:flex;gap:16px;align-items:baseline;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin-top:29px;font-size:12px;line-height:1.6}.where span{font-size:10px;color:var(--muted);white-space:nowrap;letter-spacing:.04em}.lesson-body{max-width:790px;margin:auto;display:flex;flex-direction:column;gap:30px}.body-text{font-size:15px;line-height:1.95;color:#373633}.note{padding:21px 24px;background:var(--panel);border-left:2px solid #aaa69c}.note h3{font-size:14px;font-weight:500;margin:0 0 9px}.note p{font-size:13px;line-height:1.9;color:#57554f}.steps{list-style:none;margin:0;padding:0;display:grid;gap:25px}.steps li{display:grid;grid-template-columns:30px 1fr;gap:14px}.action-number{border-radius:50%;background:var(--ink);color:white;width:25px;height:25px;display:flex;align-items:center;justify-content:center;font-family:Arial;font-size:12px;margin-top:3px}.steps h3{font-size:17px;font-weight:400;margin:0 0 7px;line-height:1.6}.steps p{font-size:14px;line-height:1.9;color:#66625d}.figure{margin:0;border:1px solid var(--line);background:white;border-radius:4px;overflow:hidden}.figure-button{display:block;width:100%;padding:0;background:white;border:0;cursor:zoom-in}.figure svg{display:block;width:100%;height:auto}.figure figcaption{border-top:1px solid var(--line);padding:13px 16px;font-size:11px;color:var(--muted);line-height:1.8;display:flex;gap:14px;align-items:flex-start}.figure figcaption>span:first-child{flex:1}.zoom-hint{white-space:nowrap;font-size:10px}.screenshot-image{width:100%;display:block}.download-card{border:1px solid var(--line);border-radius:4px;padding:22px;display:flex;align-items:center;justify-content:space-between;gap:24px}.download-card h3{margin:0 0 7px;font-size:16px;font-weight:400}.download-card p{font-size:12px;line-height:1.8;color:var(--muted);max-width:480px}.download-card .button{flex-shrink:0;min-height:42px;padding:10px 17px;font-size:12px}.flow{display:grid;grid-auto-columns:1fr;grid-auto-flow:column;gap:22px}.flow-item{background:var(--panel);padding:23px 19px;position:relative;min-width:0}.flow-item:not(:last-child):after{content:'→';position:absolute;right:-18px;top:50%;font-size:13px;color:var(--muted)}.flow-item strong{display:block;font-weight:400;font-size:15px;line-height:1.7}.flow-item span{display:block;font-size:11px;line-height:1.7;color:var(--muted);margin-top:7px}.path{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:12px;padding:20px;background:var(--panel);line-height:1.9;overflow-wrap:anywhere}.path b{font-weight:400}.path span{color:#9a968e}.spec-list,.compare{margin:0;border-top:1px solid var(--line)}.spec-row,.compare-row{padding:15px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:155px 1fr;gap:20px;line-height:1.8;font-size:14px}.spec-row dt,.compare-row dt{color:var(--muted);font-size:12px}.spec-row dd,.compare-row dd{margin:0}.equation{background:var(--ink);color:var(--paper);padding:27px;border-radius:4px}.equation strong{font-weight:400;font-size:21px;line-height:1.7}.equation p{color:#c6c3bd;font-size:12px;line-height:1.8;margin-top:14px}.file-list{border:1px solid var(--line);padding:22px}.file-list h3{font-weight:400;font-size:14px;margin:0 0 18px}.file-list div{padding:10px 0;font-size:13px;font-family:Arial;display:flex;gap:12px}.file-list div:before{content:'↳';color:var(--muted)}.copy-block{border:1px solid var(--line);border-radius:4px;overflow:hidden}.copy-head{display:flex;align-items:center;justify-content:space-between;padding:11px 17px;gap:20px;background:var(--panel)}.copy-head span{font-size:11px;color:var(--muted)}.copy-head button{border:1px solid #c8c5bf;background:var(--paper);padding:6px 14px;border-radius:3px;font-size:11px;min-height:32px}.copy-block pre{white-space:pre-wrap;overflow-wrap:anywhere;font-family:Menlo,Consolas,monospace;font-size:12px;line-height:1.95;padding:22px;margin:0;background:white}.expected{padding:25px 27px;border:1px solid var(--line);border-radius:4px}.expected .expected-label{font-size:10px;color:var(--muted);display:block;margin-bottom:13px}.expected strong{font-size:19px;line-height:1.7;font-weight:400}.expected p{font-size:11px;line-height:1.8;color:var(--muted);margin-top:12px}.external-link{padding:18px 0;border-bottom:1px solid var(--line)}.external-link a{font-size:14px;display:inline-block}.external-link p{font-size:12px;line-height:1.7;color:var(--muted);margin-top:7px}.lesson-video{margin:0}.lesson-video video{display:block;width:100%;max-height:480px;background:#e9e6de;border-radius:4px}.lesson-video figcaption{font-size:11px;color:var(--muted);line-height:1.8;margin-top:12px}.checklist{list-style:none;margin:0;padding:18px 25px;background:var(--panel)}.checklist li{padding:10px 0;font-size:14px;line-height:1.8;display:flex;gap:13px}.checklist li:before{content:'□';font-size:18px}.notebook-demo{border:1px solid #c9c9c9;background:white;border-radius:4px;overflow:hidden}.notebook-demo .toolbar{background:#f3f3f3;display:flex;gap:23px;padding:13px 18px;align-items:center;border-bottom:1px solid #ddd;font-size:12px}.notebook-demo .play{border:2px solid #171717;border-radius:3px;padding:4px 10px;background:white}.notebook-demo .nb-title{font-size:17px;padding:26px 27px 15px}.notebook-demo .nb-cell{margin:0 20px 20px;padding:16px 18px;background:#f6f6f6;border-left:4px solid #4b8ac8;display:flex;gap:16px;font-size:11px;font-family:Menlo,monospace;line-height:1.9}.notebook-demo .nb-cell code{white-space:pre-wrap;overflow-wrap:anywhere}.notebook-demo .demo-caption{padding:12px 20px;border-top:1px solid var(--line);font-size:11px;color:var(--muted);line-height:1.8}.input-demo{background:var(--panel);padding:23px}.input-demo label{font-size:12px;line-height:1.8;display:block}.input-demo .fake-input{margin:12px 0;padding:13px;border:1px solid #aaa;background:white;font-size:12px;overflow-wrap:anywhere}.input-demo p{font-size:11px;color:var(--muted);line-height:1.8}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;font-size:14px;line-height:1.7}.faq p{font-size:13px;color:var(--muted);line-height:1.9;padding:15px 0 0 19px}.ready{border-top:1px solid var(--ink);padding-top:22px;margin-top:16px}.ready h2{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0 0 10px;font-weight:400}.ready p{font-size:15px;line-height:1.9}.local-help{border-top:1px solid var(--line);padding-top:21px}.local-help summary{font-size:12px;cursor:pointer}.local-help p{padding-top:13px;font-size:13px;color:var(--muted);line-height:1.9}.reader-bottom{display:flex;justify-content:space-between;gap:18px;max-width:790px;margin:40px auto 0;padding-top:24px;border-top:1px solid var(--line)}.reader-bottom .button{font-size:13px}.reader-status{max-width:790px;margin:16px auto 0;font-size:10px;color:var(--muted);line-height:1.7;text-align:right}.prompt-builder{padding:25px;background:var(--panel)}.prompt-builder h3{font-size:18px;font-weight:400;margin:0 0 9px}.prompt-builder>p{font-size:12px;line-height:1.8;color:var(--muted);margin-bottom:22px}.builder-fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}.builder-fields label{font-size:12px;line-height:1.8}.builder-fields textarea{display:block;margin-top:7px;background:var(--paper);border:1px solid #ccc8c0;border-radius:3px;width:100%;min-height:88px;padding:12px;font-size:13px;line-height:1.8;resize:vertical}.prompt-builder>.button{margin-top:18px;font-size:12px}.builder-result{margin-top:20px}.builder-result:empty{display:none}
/* Dialogs */
dialog{border:1px solid var(--line);border-radius:5px;padding:0;background:var(--paper);color:var(--ink);max-width:calc(100vw - 32px);max-height:calc(100svh - 32px)}dialog::backdrop{background:#17171791;backdrop-filter:blur(3px)}.modal-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:15px 22px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:1}.modal-head h2{font-size:14px;font-weight:400;margin:0}.modal-close{border:0;background:none;width:38px;height:38px;font-size:23px;line-height:1}.glossary-dialog{width:650px}.glossary-content{padding:12px 25px 25px}.glossary-content dl{margin:0}.glossary-content dt{font-size:14px;padding-top:20px}.glossary-content dd{font-size:13px;line-height:1.9;color:var(--muted);margin:7px 0 0;padding-bottom:18px;border-bottom:1px solid var(--line)}.image-dialog{width:min(1300px,calc(100vw - 32px))}.zoom-area{overflow:auto;max-height:calc(100svh - 130px);padding:20px}.zoom-area img{display:block;margin:auto;max-height:calc(100svh - 190px);width:auto;object-fit:contain}.zoom-area.original img{max-width:none;max-height:none;width:auto}.zoom-caption{padding:0 23px 18px;font-size:11px;color:var(--muted);line-height:1.8}.menu-shade{display:none}
/* Owner tools */
.admin-main{max-width:1050px;margin:0 auto;padding:65px 40px}.admin-main h1{font-weight:400;font-size:34px;letter-spacing:-.03em;margin:20px 0 14px}.admin-main>.intro{font-size:14px;color:var(--muted);line-height:1.8}.admin-login{max-width:460px;margin-top:35px}.admin-login label,.issue-form label{display:block;font-size:13px;margin-bottom:12px}.admin-login input,.issue-form input{width:100%;border:1px solid #bbb;border-radius:4px;background:white;padding:14px;margin-bottom:15px;min-height:48px}.admin-login .error{margin-top:14px}.issue-panel{border:1px solid var(--line);padding:28px;margin-top:35px;max-width:700px}.issue-panel .error{margin-top:12px}.delivery-result{margin-top:25px}.delivery-result:empty{display:none}.admin-list{margin-top:48px}.admin-list h2{font-weight:400;font-size:19px}.code-table{width:100%;border-collapse:collapse;font-size:12px;text-align:left}.code-table th{font-weight:400;color:var(--muted);padding:12px 8px;border-bottom:1px solid var(--ink)}.code-table td{padding:16px 8px;border-bottom:1px solid var(--line);line-height:1.8;overflow-wrap:anywhere}.code-table .table-actions{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}.table-actions button{font-size:11px;background:none;border:1px solid var(--line);border-radius:3px;padding:8px 12px;min-height:36px}.table-actions button:hover{border-color:var(--ink)}.admin-empty{font-size:13px;color:var(--muted);padding:25px 0}.admin-warn{font-size:11px;color:var(--muted);line-height:1.8;margin-top:12px}.admin-toolbar{display:flex;justify-content:space-between;align-items:center}.pill{font-size:10px;color:var(--muted);border:1px solid var(--line);border-radius:20px;padding:4px 9px;white-space:nowrap}.pill.active{color:var(--ink);border-color:#aaa}
@media(min-width:1600px){.reader{margin-right:auto;max-width:1480px;padding-right:100px;padding-left:100px}.entry-main{gap:120px}.entry-visual{max-width:480px}}
@media(max-width:1050px){:root{--sidebar:234px}.reader{padding:122px 32px 95px}.topbar{padding-inline:24px;gap:20px}.topbar .course-name{padding-left:20px}.entry-main{gap:5vw;padding:50px 5vw;grid-template-columns:1fr .8fr}.entry-copy h1{font-size:44px}.code-line{flex-direction:column}.code-line input{width:100%;flex:auto}.entry-visual{max-width:340px}.flow{gap:16px}.flow-item{padding:19px 13px}.flow-item:not(:last-child):after{right:-14px}.flow-item strong{font-size:13px}.entry-footer{font-size:9px}}
@media(max-width:760px){.entry-header{padding:20px 23px}.brand img{width:121px;height:37px}.entry-header>span{font-size:9px}.entry-main{display:flex;flex-direction:column;gap:38px;padding:40px 24px 42px;align-items:stretch}.entry-copy{max-width:none}.entry-copy h1{font-size:42px;margin:20px 0}.entry-copy .intro{font-size:14px;line-height:1.9}.entry-meta{gap:14px;font-size:10px;margin-top:20px}.redeem-form{margin-top:30px;max-width:none}.code-line{flex-direction:row;gap:7px}.code-line input{flex:1;width:0;padding:13px 10px;font-size:14px}.code-line .button{padding-inline:14px;font-size:12px}.entry-visual{max-width:none;width:100%;justify-self:auto}.entry-visual img{height:280px;aspect-ratio:auto;object-position:50% 64%}.entry-visual figcaption{font-size:9px}.entry-footer{padding:17px 24px;display:block;line-height:1.9}.entry-footer span{display:block}.topbar{height:70px;padding:0 17px;gap:12px}.topbar .course-name{display:none}.top-actions{gap:2px}.top-actions .quiet-button{font-size:11px;padding:9px 8px}.menu-toggle{display:inline-flex;align-items:center;gap:5px;font-size:11px;padding:9px;border:1px solid var(--line);border-radius:3px;background:transparent;min-height:38px}.sidebar{top:70px;width:280px;transform:translateX(-102%);transition:transform .18s ease;padding-top:23px}.sidebar.open{transform:translateX(0)}.menu-shade.open{display:block;position:fixed;inset:70px 0 0;background:#17171770;z-index:13}.reader{margin-left:0;padding:105px 23px 60px;max-width:none}.lesson-header{margin-bottom:27px}.lesson-header h1{font-size:30px;margin-bottom:17px;line-height:1.4}.lesson-intro{font-size:15px;line-height:1.9}.lesson-kicker{font-size:10px;margin-bottom:19px}.where{margin-top:23px;padding:12px 0;gap:12px;font-size:11px}.lesson-body{gap:24px}.body-text{font-size:14px;line-height:1.95}.steps{gap:21px}.steps li{grid-template-columns:25px 1fr;gap:10px}.steps h3{font-size:15px}.steps p{font-size:13px}.action-number{width:23px;height:23px;font-size:11px}.note{padding:18px}.note h3{font-size:13px}.note p{font-size:12px}.flow{grid-auto-flow:row;grid-auto-columns:auto;gap:16px}.flow-item{padding:17px 20px;display:grid;grid-template-columns:1fr 1.2fr;align-items:center;gap:16px}.flow-item span{margin:0}.flow-item:not(:last-child):after{right:auto;top:auto;left:50%;bottom:-16px;content:'↓';font-size:11px}.flow-item strong{font-size:14px}.download-card{padding:18px;display:block}.download-card .button{margin-top:16px;min-height:42px}.download-card h3{font-size:15px}.spec-row,.compare-row{grid-template-columns:104px 1fr;gap:13px;font-size:13px;padding-block:13px}.spec-row dt,.compare-row dt{font-size:11px}.figure figcaption{padding:12px;font-size:10px;gap:9px}.zoom-hint{font-size:9px}.equation{padding:22px}.equation strong{font-size:19px}.equation p{font-size:11px}.copy-block pre{font-size:11px;padding:17px;line-height:1.9}.copy-head{padding:10px 13px;gap:10px}.copy-head span{font-size:10px}.expected{padding:20px}.expected strong{font-size:17px}.reader-bottom{gap:12px;margin-top:28px}.reader-bottom .button{padding:12px 15px;font-size:12px}.reader-bottom .button:first-child{padding-inline:13px}.reader-status{text-align:left}.ready p{font-size:14px}.builder-fields{grid-template-columns:1fr}.prompt-builder{padding:20px}.prompt-builder h3{font-size:17px}.notebook-demo .toolbar{gap:15px;font-size:11px;padding:10px 13px}.notebook-demo .nb-title{padding:20px 18px 13px;font-size:15px}.notebook-demo .nb-cell{margin:0 13px 15px;padding:14px 10px;font-size:10px;gap:8px}.path{font-size:11px;padding:16px;gap:6px}.admin-main{padding:40px 23px}.admin-main h1{font-size:29px}.issue-panel{padding:20px}.code-table thead{display:none}.code-table tr{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line);padding:12px 0}.code-table td{border:0;padding:5px 0}.code-table td:first-child{grid-column:1/-1;font-size:14px}.code-table td:last-child{grid-column:1/-1}.code-table .table-actions{justify-content:flex-start;margin-top:6px}.modal-head{padding:10px 15px}.glossary-content{padding-inline:20px}.zoom-area{padding:8px}.zoom-caption{padding:0 15px 15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.topbar,.sidebar,.reader-bottom,.reader-status,.top-actions,.menu-shade{display:none}.reader{margin:0;padding:0}.figure,.note,.steps li{break-inside:avoid}.lesson-body{gap:18px}.copy-head button{display:none}body{background:white}.reader h1{font-size:28px}}
.resource-link{border-bottom:1px solid var(--line);padding:0 0 18px;text-decoration:none;display:flex;flex-direction:column;gap:8px}.resource-link strong{font-weight:400;font-size:15px}.resource-link span{font-size:12px;line-height:1.8;color:var(--muted)}.video-figure{margin:0}.video-figure video{display:block;width:100%;max-height:520px;background:#e5e3de}.video-figure figcaption,.notebook-demo figcaption{font-size:11px;color:var(--muted);line-height:1.8;padding:13px 0}.checklist{list-style:none;padding:20px;margin:0;background:var(--panel);font-size:14px;line-height:2.2}.expected>span{display:block;font-size:10px;color:var(--muted);margin-bottom:12px}

.lesson-next{font-size:13px;color:var(--muted);line-height:1.9}.lesson-next span{display:block;font-size:10px;margin-bottom:7px;color:var(--ink)}
.video-figure video{max-height:360px}