@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Libre+Baskerville:wght@400;700&display=swap');
.policy-links{display:flex;flex-wrap:wrap;gap:12px 22px;font-size:14px;grid-column:1/-1;width:100%}footer{flex-wrap:wrap}.policy-date{font-size:14px;color:var(--muted)}.policy-page a:not(.back){color:var(--green);text-decoration:underline;text-underline-offset:3px}.contact-form{display:grid;gap:12px;margin:28px 0}.contact-form label{font-size:16px;font-weight:600}.contact-form label span,.form-help{font-size:14px;font-weight:400;color:#607066}.contact-form input,.contact-form select,.contact-form textarea{font:inherit;width:100%;padding:12px;border:1px solid #b5c5b7;background:white;border-radius:4px;color:var(--ink)}.contact-form textarea{resize:vertical}.form-check{display:flex;align-items:flex-start;gap:12px}.contact-form .form-check input{width:20px;height:20px;flex:none;margin-top:5px}.contact-form button,button{font:600 16px 'DM Sans',sans-serif;border:1px solid var(--green);border-radius:4px;padding:12px 20px;color:white;background:var(--green);cursor:pointer;width:fit-content}button:disabled{opacity:.6;cursor:wait}.form-help{margin:0}.form-trap{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}#form-status,#inbox-status{font-size:16px;overflow-wrap:anywhere}input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #4eaa91;outline-offset:3px}.inbox-message{margin:24px 0;padding:20px;border:1px solid var(--line);border-radius:4px}.message-body{white-space:pre-wrap;overflow-wrap:anywhere}
:root{--paper:#fafbf8;--ink:#25352f;--muted:#778079;--line:#dfe5dd;--green:#08745e;--light:#edf2ea}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #4eaa91;outline-offset:5px}a:hover{color:var(--green)}header{border-bottom:1px solid var(--line)}.topbar{height:118px;max-width:1376px;margin:auto;display:flex;align-items:center;justify-content:space-between;position:relative;padding:0 40px}.logo{font:bold 28px monospace;background:var(--green);color:#fff;width:46px;height:46px;border-radius:10px;display:grid;place-content:center;display:flex;align-items:center;justify-content:center}.logo:hover{color:#fff}.logo span{color:#b1d3ad}.masthead{position:absolute;left:50%;transform:translateX(-50%);font-family:'Libre Baskerville',Georgia,serif;font-size:35px;font-weight:700;text-align:center;white-space:nowrap;letter-spacing:-1.2px}.masthead span{display:block;font-family:'DM Sans',sans-serif;font-size:10px;letter-spacing:2.3px;font-weight:600;margin-top:7px;color:var(--muted)}.header-link{font-size:13px}.header-link span{margin-left:9px}nav{border-top:1px solid var(--line);display:flex;justify-content:center;gap:34px;height:58px;overflow:auto;padding:0 20px}nav a{font-size:14px;white-space:nowrap;display:flex;align-items:center;border-bottom:3px solid transparent;padding-top:3px}nav a.active{border-color:var(--green);font-weight:700;color:var(--green)}main{max-width:1280px;margin:auto;padding:36px 40px 72px}.eyebrow{text-transform:uppercase;letter-spacing:1.8px;font-size:11px;font-weight:700;color:var(--green);display:flex;align-items:center;gap:10px}.eyebrow::before{content:'';width:18px;height:1px;background:var(--green)}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:center;padding-bottom:40px;border-bottom:1px solid var(--line)}.hero-img{aspect-ratio:1.55;object-fit:cover;width:100%;border-radius:4px;background:var(--light)}.hero h1{font-family:'Libre Baskerville',Georgia,serif;font-size:37px;line-height:1.3;letter-spacing:-1.2px;margin:17px 0}.hero p{font-size:16px;color:#707970;line-height:1.75;margin:0 0 21px}.meta{font-size:10px;letter-spacing:1px;color:var(--muted);text-transform:uppercase;display:flex;align-items:center;gap:9px}.avatar{background:#e4ece1;color:var(--green);width:25px;height:25px;border-radius:50%;display:inline-grid;place-items:center;font:bold 11px monospace;letter-spacing:-1px}.read-link{font-size:13px;color:var(--green);display:inline-block;margin-top:24px;font-weight:650}.read-link span{margin-left:12px}.body-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:40px;padding-top:32px}.section-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 23px}.section-title h2{font:700 25px 'Libre Baskerville',Georgia,serif;letter-spacing:-.6px;margin:0}.section-title a{font-size:10px;letter-spacing:1.1px;text-transform:uppercase;font-weight:650;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.card img{width:100%;aspect-ratio:1.48;object-fit:cover;border-radius:3px;background:var(--light);transition:filter .2s}.card a:hover img{filter:brightness(.92)}.tag{font-size:10px;letter-spacing:1.25px;text-transform:uppercase;font-weight:700;color:var(--green);margin-top:15px}.card h3{font:700 18px/1.5 'Libre Baskerville',Georgia,serif;letter-spacing:-.4px;margin:7px 0 9px}.card p{font-size:13px;color:var(--muted);line-height:1.7;margin:0 0 15px}.card .meta{font-size:9px;letter-spacing:.7px;flex-wrap:wrap}.section{padding-bottom:30px;margin-bottom:30px;border-bottom:1px solid var(--line)}aside{border-left:1px solid var(--line);padding-left:28px}.about-mark{font:bold 24px monospace;color:var(--green);margin:0 0 14px}.about-box h2{font:700 20px/1.4 'Libre Baskerville',serif;margin:0 0 10px}.about-box p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.side-link{display:block;border:1px solid var(--green);color:var(--green);padding:9px 12px;text-align:center;font-size:12px;font-weight:650;border-radius:3px;margin-top:20px}.side-link:hover{background:var(--green);color:white}.sidebar-section{margin-top:28px;padding-top:24px;border-top:1px solid var(--line)}.sidebar-section h3{font-size:10px;letter-spacing:1.5px;margin:0 0 18px;color:var(--muted)}.topic{display:flex;justify-content:space-between;padding:8px 0;font-size:13px}.topic span{color:#99a096;font-size:11px}.note{font:italic 16px/1.8 Georgia,serif;color:#6b776d}.list-post{padding:20px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.list-post h3{font:700 19px/1.55 'Libre Baskerville',serif;margin:5px 0 8px}.list-post .tag{margin:0}.list-post .arrow{font-size:23px;color:var(--green)}footer{border-top:1px solid var(--line);max-width:1200px;margin:auto;padding:35px 0 40px;display:flex;justify-content:space-between;align-items:center;gap:24px;font-size:11px;color:var(--muted)}.footer-brand{font:700 19px 'Libre Baskerville',serif;color:var(--ink)}.footer-brand span{display:block;font:11px 'DM Sans',sans-serif;margin-top:10px;color:var(--muted)}.page-heading{max-width:700px;margin:12px 0 40px}.page-heading h1{font:700 39px/1.3 'Libre Baskerville',serif;margin:15px 0}.page-heading p{color:var(--muted)}.archive-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin-top:30px}.article{max-width:720px;margin:0 auto}.back{font-size:13px;color:var(--green)}.article h1{font:700 40px/1.35 'Libre Baskerville',serif;letter-spacing:-1px;margin:24px 0 18px}.article .dek{font-size:19px;color:var(--muted)}.article .cover{width:100%;max-height:430px;object-fit:cover;margin:32px 0 12px;border-radius:4px}.article-content{font-size:17px;line-height:1.95}.article-content h2{font:700 24px/1.5 'Libre Baskerville',serif;margin-top:35px}.article-content li{margin-bottom:10px}.article-content code{font-size:14px;background:var(--light);padding:3px 6px;border-radius:3px;overflow-wrap:anywhere}.callout{padding:20px 24px;background:var(--light);border-left:3px solid var(--green);margin:24px 0}.guide-number{font-family:monospace;color:var(--green);font-size:14px;margin-bottom:8px}.start-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.start-item{padding:30px;background:var(--light);border:1px solid var(--line);border-radius:4px}.start-item h2{font:700 24px/1.5 'Libre Baskerville',serif}.start-item p{color:var(--muted)}@media(min-width:1500px){main{padding-top:45px}.hero h1{font-size:42px}}@media(max-width:1000px){.hero{gap:30px}.hero h1{font-size:30px}.body-grid{grid-template-columns:minmax(0,1fr) 220px;gap:25px}.cards{gap:16px}.card h3{font-size:16px}aside{padding-left:20px}footer{margin:0 40px}.header-link{font-size:12px}}@media(max-width:760px){.topbar{height:95px;padding:0 20px}.masthead{font-size:27px}.masthead span{font-size:8px;letter-spacing:1.5px}.logo{width:35px;height:35px;font-size:22px;border-radius:7px}.header-link{display:none}nav{justify-content:flex-start;gap:25px;height:53px}nav a{font-size:13px}main{padding:25px 20px 40px}.hero{grid-template-columns:1fr;gap:22px;padding-bottom:28px}.hero-img{aspect-ratio:1.6}.hero h1{font-size:31px}.hero p{font-size:15px}.read-link{margin-top:17px}.body-grid{grid-template-columns:1fr;padding-top:28px}.cards{grid-template-columns:1fr;gap:25px}.card>a{display:block}.card img{aspect-ratio:1.8}.card h3{font-size:21px}.card p{font-size:14px}.card .meta{font-size:10px}aside{border-left:0;padding:22px 0 0;border-top:1px solid var(--line)}.sidebar-section{display:none}.about-box{max-width:400px}.section-title h2{font-size:23px}.archive-grid{grid-template-columns:1fr}.start-grid{grid-template-columns:1fr}.article h1{font-size:31px}.page-heading h1{font-size:33px}.article .dek{font-size:17px}footer{margin:0 20px;display:grid;grid-template-columns:1fr 1fr;padding:25px 0}footer p{display:none}.footer-brand{grid-column:1/-1}.article-content{font-size:16px}}

.cover-figure{margin:0 0 28px}.cover-figure .cover{margin-bottom:6px}figcaption{font-size:12px;line-height:1.7;color:#68746b}figcaption a,.article-content a{color:var(--green);text-decoration:underline;text-underline-offset:3px}.guide-figure{margin:35px 0;max-width:480px}.guide-figure img{display:block;width:100%;height:auto}.guide-figure figcaption{margin-top:10px}.article-content pre{background:#edf2ea;border:1px solid var(--line);border-radius:5px;padding:18px 20px;overflow-x:auto;line-height:1.7}.article-content pre code{padding:0;white-space:pre;font-size:14px;background:none}.article-content p{margin:0 0 22px}.article-content h2{scroll-margin-top:20px}.article-content a{overflow-wrap:anywhere}
.course-heading{max-width:850px}.course-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.course-facts span{font-size:14px;border:1px solid var(--line);padding:7px 12px;border-radius:4px}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:40px}.course-lesson{display:grid;grid-template-columns:45px minmax(0,1fr) 155px;gap:20px;border-top:1px solid var(--line);padding:30px 0}.lesson-number{font:700 26px/1.5 'Libre Baskerville',serif;color:var(--green)}.lesson-copy .tag{margin-top:0;font-size:12px}.lesson-copy h2{font:700 23px/1.5 'Libre Baskerville',serif;margin:7px 0 12px}.lesson-copy>p{font-size:16px;color:#607066;margin:0 0 16px}.lesson-image img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:4px}.lesson-outcome{font-size:14px;margin-bottom:16px}.lesson-outcome strong{display:block;color:var(--green);font-weight:600}.course-aside h2{font:700 18px/1.5 'Libre Baskerville',serif;margin:0 0 12px}.course-aside p{font-size:15px;color:#607066;margin:0 0 28px}.lesson-checkpoint{padding:18px 22px;background:var(--light);border-left:3px solid var(--green);margin:28px 0;font-size:16px}.lesson-checkpoint strong{color:var(--green)}.lesson-checkpoint p{margin:7px 0 0}.lesson-navigation{display:flex;flex-wrap:wrap;justify-content:space-between;height:auto;gap:14px;padding:24px 0;margin-top:35px;border-bottom:1px solid var(--line);overflow:visible}.lesson-navigation a{font-size:14px;color:var(--green);padding:0;border:0}.lesson-navigation span{font-size:14px;color:#607066}@media(max-width:1000px){.course-layout{grid-template-columns:minmax(0,1fr) 210px;gap:25px}.course-lesson{grid-template-columns:35px minmax(0,1fr);gap:15px}.lesson-image{display:none}}@media(max-width:760px){.course-layout{grid-template-columns:1fr}.course-lesson{padding:24px 0}.lesson-copy h2{font-size:21px}.course-aside{padding-top:25px}.lesson-navigation{justify-content:flex-start;gap:20px}.course-facts span{font-size:13px}}

.screen-figure{margin:24px 0 32px;clear:both}.screen-figure img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:10px;background:#edf2ea}.screen-figure figcaption{margin-top:10px;max-width:75ch}

footer .app-promo-footer{flex:0 0 100%;grid-column:1/-1;width:100%;margin-top:4px;border-top:1px solid var(--line);padding-top:24px}
footer .app-promo{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;color:var(--ink);text-align:left}
.app-promo-copy{min-width:0}.app-promo-copy h2{font:600 17px/1.45 'DM Sans',sans-serif;margin:0 0 4px}footer .app-promo-copy p{display:block;font-size:14px;line-height:1.5;color:#607066;margin:0}
.app-promo-links{display:flex;gap:10px;flex-shrink:0}.app-promo-links a{display:flex;align-items:center;gap:10px;min-height:52px;padding:9px 16px;border:1px solid #25352f;border-radius:7px;background:#172a24;color:#fff;font-size:15px;font-weight:600;line-height:1.3;white-space:nowrap}.app-promo-links a:hover{background:var(--green);border-color:var(--green)}.app-promo-links small{display:block;font-size:12px;font-weight:400;color:#d3e3d9;margin-bottom:2px}.app-promo-links .store-icon{display:block;width:22px;height:26px;flex:0 0 22px}
@media(max-width:760px){footer .app-promo-footer{padding-top:20px}footer .app-promo{flex-direction:column;align-items:flex-start;gap:14px}.app-promo-links{width:100%;flex-wrap:wrap}.app-promo-links a{flex:1;justify-content:center;padding:10px 12px;font-size:14px}}
footer .app-promo-footer{margin-top:0;padding-top:0;padding-bottom:24px;border-top:0;border-bottom:1px solid var(--line)}@media(max-width:760px){footer .app-promo-footer{padding-top:0;padding-bottom:20px}}

/* Compact, accessible navigation for touch screens. */
.menu-toggle{display:none}
@media(max-width:1000px){
  header .topbar{height:80px;padding:0 20px;gap:12px;justify-content:flex-start}
  header .logo{width:36px;height:36px;flex:0 0 36px;font-size:23px;border-radius:8px}
  header .masthead{position:static;transform:none;text-align:left;font-size:25px;letter-spacing:-.8px;min-width:0}
  header .masthead span{display:none}
  header .menu-toggle:not([hidden]){display:flex;align-items:center;justify-content:center;gap:9px;min-height:44px;margin-left:auto;padding:9px 12px;flex-shrink:0;background:transparent;color:var(--green);border:1px solid var(--line);font-size:14px;border-radius:7px}
  .menu-icon{width:17px;height:12px;border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}
  .menu-icon::after{content:'';position:absolute;left:0;right:0;top:3px;border-top:2px solid currentColor}
  .menu-open .menu-toggle{background:var(--light)}
  .menu-open .menu-icon{border:0}
  .menu-open .menu-icon::before,.menu-open .menu-icon::after{content:'';position:absolute;left:0;right:0;top:5px;border-top:2px solid currentColor;transform:rotate(45deg)}
  .menu-open .menu-icon::after{transform:rotate(-45deg)}
  header #main-navigation{height:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:12px 20px 18px;overflow:visible}
  header.navigation-ready:not(.menu-open) #main-navigation{display:none}
  header #main-navigation a{min-height:46px;padding:10px 12px;border:0;border-radius:6px;font-size:15px;white-space:normal}
  header #main-navigation a:hover,header #main-navigation a.active{background:var(--light);color:var(--green)}
  header #main-navigation a:focus-visible{outline-offset:-3px}
}
@media(max-width:360px){
  header .topbar{padding:0 14px;gap:9px}
  header .masthead{font-size:21px}
  header #main-navigation{padding-left:14px;padding-right:14px}
}

/* Playground: a quiet editor, with the publication's paper and typography. */
.playground{max-width:1280px;margin:0 auto}
.pg-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin:0 0 28px;padding-bottom:25px;border-bottom:1px solid var(--line)}
.pg-heading h1{font:400 38px/1.3 'Libre Baskerville',serif;letter-spacing:-1.5px;margin:0 0 9px}
.pg-title-dot{color:var(--green)}
.pg-heading p{margin:0;color:#66716b;font-size:15px}
.pg-course-link{font-size:13px;color:#66716b;white-space:nowrap;padding-bottom:3px;text-decoration:underline;text-underline-offset:4px}
.pg-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 0 14px}
.pg-starter,.pg-actions{display:flex;align-items:center;gap:10px}
.pg-starter label{font-size:13px;color:#66716b}
.pg-toolbar select{font:400 13px 'DM Sans',sans-serif;padding:8px 30px 8px 10px;min-height:35px;color:var(--ink);background:#fff;border:1px solid #d3d9d3;border-radius:2px;max-width:100%}
.playground button{font:500 13px 'DM Sans',sans-serif;border-radius:2px;padding:8px 13px;min-height:35px}
.pg-toolbar .pg-secondary{color:#526158;background:transparent;border:1px solid #d3d9d3}
.pg-toolbar .pg-secondary:hover{background:#edf0eb;border-color:#aeb8ae}
#pg-run{display:flex;align-items:center;gap:8px;color:#fff;background:#283d33;border:1px solid #283d33}
#pg-run:hover{background:#08745e;border-color:#08745e}
.pg-shortcut{font:11px Consolas,monospace;color:#7a847d;margin-right:4px}
.pg-workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border:1px solid #cdd5cd;border-radius:2px;overflow:hidden;background:#fff}
.pg-editor{min-width:0;background:#fff;border-right:1px solid #cdd5cd}
.pg-tabs{display:flex;align-items:stretch;background:#f1f3ef;border-bottom:1px solid #dde3da;min-height:44px}
.pg-tabs button{color:#717a72;background:transparent;border:0;border-right:1px solid #e1e5dd;border-radius:0;min-height:44px;font:12px Consolas,monospace;padding:0 16px;white-space:nowrap}
.pg-tabs button[aria-selected=true]{background:#fff;color:#263e32;box-shadow:inset 0 2px #08745e;margin-bottom:-1px}
.pg-tabs button:hover{color:#263e32;background:#e9ede6}
.pg-tabs button[aria-selected=true]:hover{background:#fff}
.pg-tabs .pg-copy{margin-left:auto;border:0;font:12px 'DM Sans',sans-serif;padding:0 13px}
#pg-panel{position:relative;display:flex;min-width:0}
.pg-lines{flex:0 0 45px;width:45px;height:380px;margin:0;padding:20px 10px 20px 0;text-align:right;overflow:hidden;background:#fbfcf9;color:#a0a89d;border-right:1px solid #eef0ea;font:13px/24px Consolas,'Courier New',monospace;user-select:none}
#pg-code{display:block;width:calc(100% - 45px);height:380px;resize:none;border:0;margin:0;padding:20px 16px;background:#fff;color:#2e3831;font:13px/24px Consolas,'Courier New',monospace;tab-size:2;white-space:pre;overflow:auto;border-radius:0}
#pg-code:focus-visible{outline:2px solid #87a894;outline-offset:-2px}
.pg-editor-footer{min-height:37px;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:5px 13px;border-top:1px solid #e5e9e0;background:#fbfcf9;color:#7a837b;font-size:11px}
.pg-editor-footer button{min-height:25px;padding:2px 0;background:none;border:0;color:#66716b;font-size:11px}
.pg-output{background:#fff;min-width:0;display:flex;flex-direction:column}
.pg-output-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 16px;min-height:44px;border-bottom:1px solid #dde3da;background:#fbfcf9;font-size:12px}
.pg-output-heading strong{font-weight:500}
.pg-output-heading span{font:11px Consolas,monospace;color:#7a837b}
#pg-preview{display:block;width:100%;height:417px;flex:1;border:0;background:#fff;min-height:360px}
.pg-notes{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;color:#7a837b;font-size:12px;margin-top:15px}
.pg-notes>p{margin:0}
.pg-notes details{max-width:360px;text-align:right}
.pg-notes summary{cursor:pointer;color:#536459;white-space:nowrap}
.pg-notes details p{text-align:left;margin:12px 0 0;line-height:1.7}
.pg-notes a{color:var(--green);text-decoration:underline;text-underline-offset:3px}
.pg-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
body:has(.playground) .app-promo-footer{display:none}
@media(max-width:720px){.pg-heading{align-items:flex-start;gap:16px;flex-direction:column;margin-bottom:22px;padding-bottom:20px}.pg-heading h1{font-size:30px}.pg-course-link{font-size:12px}.pg-workspace{grid-template-columns:1fr}.pg-editor{border-right:0;border-bottom:1px solid #cdd5cd}.pg-shortcut{display:none}.pg-toolbar{gap:12px;flex-wrap:wrap}.pg-starter{gap:8px}.pg-tabs button{padding:0 13px}.pg-actions{gap:7px}.pg-lines,#pg-code{height:290px}#pg-preview{height:320px;min-height:320px;flex:auto}.pg-notes{flex-direction:column;gap:10px}.pg-notes details{text-align:left;max-width:100%}}
@media(max-width:400px){.pg-starter label{display:none}.pg-tabs button{padding:0 10px}.pg-tabs .pg-copy{padding:0 9px}.pg-toolbar select{padding-right:15px}.playground button{padding:8px 10px}.pg-lines{flex-basis:35px;width:35px;padding-right:7px}#pg-code{width:calc(100% - 35px);padding-left:11px}}