@charset "UTF-8";
:root{--bg:#f7f9fa;--surface:#fff;--ink:#202f35;--muted:#66767e;--line:#e3e9ec;--green:#16765e;--mint:#e6f4ed;--radius:18px;--shadow:0 8px 28px #253c4510;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.6}
*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a,button{touch-action:manipulation}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.25;letter-spacing:-.035em}h1{font-size:clamp(28px,3vw,42px);font-weight:750;margin-bottom:16px}h2{font-size:27px;margin-bottom:12px}h3{font-size:20px}p{margin-bottom:18px}::selection{background:#c3e9da}:focus-visible{outline:3px solid #387bd2;outline-offset:4px}main:focus{outline:none}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-90px;left:20px;background:var(--ink);color:#fff;padding:12px 20px;z-index:100}.skip-link:focus{top:12px}
.sidebar{position:fixed;inset:0 auto 0 0;width:248px;z-index:30;background:#fff;border-right:1px solid var(--line);padding:32px 22px;display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;align-items:center;color:var(--ink);text-decoration:none;font-weight:800;font-size:27px;letter-spacing:-1px;gap:10px}.brand-icon{font-family:monospace;font-size:23px;display:grid;place-content:center;position:relative;width:40px;height:40px;background:var(--ink);color:#fff;border-radius:12px;letter-spacing:-3px;padding-right:4px}.brand-icon span{color:#86d7ad;position:absolute;right:5px;bottom:2px}.brand-dot{color:var(--green);margin-left:-9px}.sidebar-caption{font-size:8px;letter-spacing:1.1px;color:var(--muted);margin:16px 0 34px}.nav-heading{font-size:10px;letter-spacing:1.5px;font-weight:700;text-transform:uppercase;color:var(--muted);margin:27px 12px 12px}.nav-link{display:flex;align-items:center;gap:12px;color:#53646c;text-decoration:none;font-size:13px;font-weight:600;padding:12px;border-radius:10px;margin-bottom:6px}.nav-link>span{font-size:21px;line-height:1;width:22px;text-align:center}.nav-link:hover{background:var(--bg)}.nav-link.active{background:var(--mint);color:var(--green)}.sidebar-note{margin-top:auto;padding:24px 17px;background:#f5f8f6;border-radius:14px;position:relative}.sidebar-note strong{display:block;font-size:15px;line-height:1.5}.sidebar-note p{font-size:12px;color:var(--muted);margin:10px 0 0}.note-symbol{display:block;font:700 24px monospace;color:var(--green);margin-bottom:14px}.sidebar-footer{font-size:10px;color:var(--muted);display:flex;align-items:center;gap:8px;margin:24px 5px 0}.status-dot{display:inline-block;width:7px;height:7px;background:#31976e;border-radius:50%;flex:none}.workspace{margin-left:248px;min-height:100vh;display:flex;flex-direction:column}.topbar{height:85px;padding:0 42px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);background:#ffffffc9}.topbar-label{font-size:12px;color:var(--muted)}.account{display:flex;gap:18px;align-items:center;font-size:13px}.account form{margin:0}.avatar{flex:none;display:grid;place-content:center;background:#e8e9f7;color:#625593;border-radius:50%;width:36px;height:36px;font-weight:700}.account-name{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.menu-button{display:none}.button-icon{border:1px solid var(--line);background:#fff;border-radius:9px;padding:6px 12px;font-size:21px}.button{display:inline-flex;justify-content:center;align-items:center;gap:18px;background:var(--green);color:#fff;border:1px solid transparent;border-radius:10px;text-decoration:none;font-size:13px;font-weight:650;line-height:1.5;min-height:44px;padding:12px 20px;transition:background .18s,transform .18s;white-space:nowrap}.button:hover{background:#105d4a;transform:translateY(-1px)}.button-small{min-height:38px;padding:9px 15px;font-size:12px}.button-secondary{background:#fff;border-color:var(--line);color:var(--ink)}.button-secondary:hover{background:var(--mint)}.button-full{width:100%}.text-link,.text-button{font-weight:600;font-size:13px;text-decoration:none}.text-button{color:var(--green);background:none;border:0;padding:8px 0}.text-link:hover,.text-button:hover{text-decoration:underline}.danger{color:#b83d45}.button-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.push-right{margin-left:auto}
main{padding:36px 42px 64px;width:100%;max-width:1520px;margin:0 auto;flex:1;min-width:0}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;align-items:center;min-height:343px;padding:38px;background:#eaf2ee;border:1px solid #deebe3;border-radius:22px;overflow:hidden;margin-bottom:44px}.eyebrow{display:flex;align-items:center;gap:8px;font-size:9px;font-weight:750;letter-spacing:1.7px;color:var(--green);margin-bottom:15px}.hero h1{font-size:clamp(27px,2.65vw,40px);line-height:1.23;margin-bottom:16px}.hero h1 span{color:var(--green)}.hero-copy>p{font-size:13px;color:#60776e;max-width:420px;line-height:1.85;margin-bottom:24px}.hero-art{position:relative;padding:28px 5px 25px 18px;min-width:0}.code-window{background:#fff;border:1px solid #dfe8e2;box-shadow:12px 16px 0 #d9e7df8a,0 16px 30px #4c6e5910;border-radius:13px;transform:rotate(-3deg);max-width:335px;margin:auto;overflow:hidden}.window-dots{height:37px;display:flex;align-items:center;gap:5px;border-bottom:1px solid #edf0ed;padding:0 14px}.window-dots i{height:6px;width:6px;border-radius:100%;background:#d6e1db}.window-dots i:first-child{background:#e1b1a3}.window-dots i:nth-child(2){background:#e5d3a0}.window-dots i:nth-child(3){background:#95c6ae}.window-dots span{font:9px monospace;color:#91a199;margin-left:auto}.hero-code{font:12px/1.95 ui-monospace,SFMono-Regular,Consolas,monospace;padding:22px 24px 27px;white-space:nowrap}.code-comment{color:#8a9993}.code-purple{color:#9963b3}.code-blue{color:#4579aa}.code-green{color:#318263}.floating-label{position:absolute;top:5px;right:18px;z-index:1;background:#fff8df;border:1px solid #eddfb2;border-radius:8px;padding:6px 13px;font:11px monospace;transform:rotate(5deg)}.floating-badge{position:absolute;bottom:3px;left:0;padding:10px 18px;background:#fff;border:1px solid #dfebe4;border-radius:10px;box-shadow:var(--shadow);font-size:10px;color:#537967;transform:rotate(3deg)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}.section-heading h2{margin:0}.section-heading .eyebrow{margin-bottom:8px}.section-heading>.muted{font-size:12px}.muted{color:var(--muted)}.searchbar{display:flex;align-items:center;gap:14px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px 12px 9px 20px;margin-bottom:26px}.searchbar>span{font-size:25px;color:var(--muted)}.searchbar input{border:0;background:none;box-shadow:none;min-width:0;flex:1;padding:9px 0}.searchbar input:focus{box-shadow:none}.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}.lesson-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.card-art{height:152px;position:relative;overflow:hidden;padding:20px}.art-mint{background:#e5f1e8;color:#4e8267}.art-lavender{background:#eeebf8;color:#8773a8}.art-peach{background:#fbefdf;color:#ba8a4d}.art-blue{background:#e6eff8;color:#628dad}.art-caption{font-size:8px;letter-spacing:1.4px;font-weight:700}.code-art{position:absolute;top:69px;left:21px;font:600 clamp(12px,1.1vw,16px) ui-monospace,Consolas,monospace;z-index:1}.art-bracket{position:absolute;font:80px/1 monospace;right:10px;bottom:7px;opacity:.16;transform:rotate(-9deg)}.art-number{position:absolute;right:18px;top:16px;font:10px monospace;opacity:.65}.card-content{padding:22px;display:flex;flex-direction:column;flex:1}.card-meta{display:flex;align-items:center;gap:14px;font-size:10px;color:var(--muted);margin-bottom:15px}.tag{color:var(--green);background:#eef6f0;border-radius:5px;padding:3px 8px;font-size:10px;font-weight:650}.card-content h3{font-size:18px;line-height:1.4;margin-bottom:10px}.card-content h3 a{color:var(--ink);text-decoration:none}.card-content h3 a:hover{color:var(--green)}.card-content p{font-size:12px;color:var(--muted);line-height:1.85;margin-bottom:22px}.card-link{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:650;text-decoration:none;margin-top:auto;padding-top:15px;border-top:1px solid #eef1f2}.card-link:hover{text-decoration:underline}.card-link>span:not(.sr-only){font-size:18px}.empty-state{grid-column:1/-1;text-align:center;padding:55px 25px;width:100%;border:1px dashed var(--line);border-radius:16px;background:#ffffff80}.empty-state>span{font-size:35px;color:var(--green)}.empty-state h3{margin:10px 0}.empty-state p{color:var(--muted);font-size:14px}.compact{padding:28px}.page-footer{border-top:1px solid var(--line);margin:0 42px;padding:23px 0;display:flex;justify-content:space-between;gap:14px;color:var(--muted);font-size:10px}.page-footer a{text-decoration:none}
.page-heading{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-bottom:28px}.page-heading p{color:var(--muted);font-size:14px;margin-bottom:0}.page-heading h1{margin-bottom:12px}.panel{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:24px}.panel-title{font-size:20px}.field{margin-bottom:22px;min-width:0}.field>label{font-size:13px;font-weight:650;display:inline-block;margin-bottom:8px}.required{color:var(--green);font-size:12px}.field input:not([type=checkbox]):not([type=radio]),.field textarea,.field select{display:block;width:100%}input,textarea,select{max-width:100%;background:#fff;border:1px solid #dbe3e6;border-radius:8px;padding:11px 13px;color:var(--ink);font-size:14px;min-height:44px}input[type=checkbox],input[type=radio]{min-height:auto;accent-color:var(--green)}input:focus,textarea:focus,select:focus{border-color:#4c9b81}textarea{resize:vertical;min-height:100px}input::placeholder,textarea::placeholder{color:#839299}select[multiple]{min-height:180px;padding:8px}select[multiple] option{padding:7px 10px;border-radius:4px}.help-text{font-size:12px;color:var(--muted);margin-top:7px;line-height:1.7}.help-text ul{padding-left:20px;margin:5px 0}.field-error,.errorlist{font-size:13px;color:#b23842;margin:8px 0;list-style:none;padding:0}.field-invalid input,.field-invalid select,.field-invalid textarea{border-color:#ce7780}.notice{background:#eaf5ef;border:1px solid #cde6d8;padding:14px 18px;border-radius:10px;margin-bottom:20px;font-size:14px}.notice.error{background:#fff1f1;border-color:#f0cdd0;color:#9f343e}.notice.warning{background:#fff8e8;border-color:#ebdab0}.notice .errorlist{margin:0}.narrow-form{max-width:740px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}.filter-bar{display:flex;align-items:flex-end;flex-wrap:wrap;gap:15px;padding:20px}.filter-bar .field{flex:1 1 140px;margin:0}.filter-bar .text-link{padding:12px 0}.table-panel{padding:0;overflow:hidden}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:13px}th{background:#fbfcfc;color:var(--muted);font-weight:500;font-size:11px;padding:17px 23px;white-space:nowrap}td{padding:20px 23px;border-top:1px solid var(--line);vertical-align:middle}td:first-child{min-width:200px}td:not(:first-child){white-space:nowrap}.table-title{font-weight:650;text-decoration:none;color:var(--ink);white-space:normal;display:block;max-width:350px}.table-title:hover{color:var(--green)}.table-subtitle{display:block;font-size:11px;color:var(--muted);margin-top:4px}.badge{display:inline-flex;border-radius:6px;padding:4px 9px;font-size:10px;font-weight:650;background:#f4f1e9;color:#8b723d}.badge.published{background:#e9f5ed;color:#287954}.badge.hidden{background:#eef0f2;color:#65727d}.group-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.group-card{margin:0;display:flex;flex-direction:column;overflow-wrap:anywhere}.group-icon{width:48px;height:48px;display:grid;place-content:center;background:var(--mint);color:var(--green);border-radius:13px;font-size:28px;margin-bottom:22px}.group-card h2{font-size:22px}.group-card p{font-size:13px}.breadcrumb{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:12px;margin-bottom:25px;flex-wrap:wrap}.breadcrumb a{text-decoration:none}.article-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:42px;max-width:1000px;margin:0 auto 38px}.article-header{border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:30px}.article-header h1{overflow-wrap:anywhere}.article-summary{color:var(--muted);font-size:17px;line-height:1.8}.prose{font-size:15px;line-height:1.95;overflow-wrap:anywhere;min-width:0}.prose h1{font-size:32px}.prose h2{font-size:25px}.prose h3{font-size:21px}.prose h1,.prose h2,.prose h3,.prose h4{margin:1.4em 0 .7em}.prose>:first-child{margin-top:0}.prose pre{background:#243439;color:#e2ede7;border-radius:12px;padding:22px;overflow:auto;line-height:1.8;font-size:13px;white-space:pre;overflow-wrap:normal}.prose code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em;background:#edf3f0;padding:3px 6px;border-radius:5px;color:#28705a}.prose pre code{background:none;color:inherit;padding:0;font-size:inherit}.prose blockquote{border-left:3px solid #78b69a;background:#f1f7f3;margin:22px 0;padding:16px 22px;color:#4a6d5b}.prose blockquote p:last-child{margin:0}.prose img{border-radius:12px;display:block;margin:20px auto}.prose table{display:block;overflow-x:auto;margin:20px 0}.prose hr{border:0;border-top:1px solid var(--line);margin:30px 0}.prose .hljs-keyword{color:#c5a4eb}.prose .hljs-string{color:#a4dab4}.discussion{max-width:1000px;margin:auto}.tabs{display:flex;gap:9px;overflow-x:auto;border-bottom:1px solid var(--line);margin-bottom:20px}.tab{white-space:nowrap;text-decoration:none;padding:12px 16px;border-bottom:2px solid transparent;color:var(--muted);font-size:13px}.tab.selected{color:var(--green);border-color:var(--green);font-weight:700}.comment{display:flex;gap:15px;padding:23px 0;border-bottom:1px solid var(--line)}.comment-content{flex:1;min-width:0}.comment-heading{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;margin-bottom:8px}.comment-heading time{color:var(--muted);font-size:11px}.comment-body{font-size:14px;overflow-wrap:anywhere}.comment-form{margin-top:24px}.comment-form h3{font-size:19px}
.editor-details textarea{min-height:90px;max-height:220px}.editor-panel{padding:0;overflow:hidden}.editor-toolbar{display:flex;align-items:center;gap:5px;flex-wrap:wrap;padding:10px 15px;border-bottom:1px solid var(--line);background:#fcfdfc}.editor-toolbar button{border:0;background:transparent;min-width:36px;min-height:36px;padding:5px 9px;border-radius:6px;font-size:13px;color:#53656a}.editor-toolbar button:hover{background:var(--mint);color:var(--green)}.toolbar-divider{height:20px;width:1px;background:var(--line);margin:0 5px}.toolbar-caption{margin-left:auto;color:var(--muted);font-size:10px}.editor-columns{display:grid;grid-template-columns:1fr 1fr}.editor-source,.editor-preview{min-width:0}.editor-source{border-right:1px solid var(--line)}.editor-pane-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:13px 20px;border-bottom:1px solid var(--line);font-size:12px;font-weight:650}.editor-pane-heading>span:last-child{font-size:9px;letter-spacing:.6px;color:var(--muted);font-weight:400}.editor-source textarea{display:block;border:0;border-radius:0;width:100%;height:520px;min-height:320px;resize:vertical;font:13px/1.9 ui-monospace,Consolas,monospace;padding:20px;background:#fcfdfc}.editor-source textarea:focus-visible{outline-offset:-3px}.editor-source .field-error{padding:0 20px}.preview-body{height:520px;overflow:auto;padding:20px;font-size:14px}.editor-feedback{font-size:12px;color:var(--muted);margin:0;padding:0 20px}.editor-feedback:not(:empty){padding:12px 20px;border-top:1px solid var(--line)}.save-bar{position:sticky;bottom:12px;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:15px;background:#fffffff5;box-shadow:var(--shadow);border:1px solid var(--line);border-radius:12px;padding:14px 18px}.save-bar .help-text{margin:0}.student-search{margin-bottom:10px}.student-options{max-height:320px;overflow:auto;border:1px solid var(--line);border-radius:9px;padding:8px}.student-option{display:flex!important;align-items:center;gap:10px;padding:9px 10px;margin:0!important;border-radius:5px;font-weight:400!important}.student-option:hover{background:var(--mint)}.student-option[hidden]{display:none!important}.student-option input{width:17px;height:17px}.auth-shell{max-width:490px;margin:34px auto 60px}.auth-intro{text-align:center;margin-bottom:28px}.auth-intro .eyebrow{justify-content:center}.auth-intro h1,.success-card h1{font-size:31px}.auth-intro p,.success-card p{color:var(--muted);font-size:14px}.auth-card{padding:32px}.auth-bottom{text-align:center;font-size:13px;color:var(--muted)}.auth-bottom a{font-weight:600}.auth-symbol{display:grid;place-content:center;width:62px;height:62px;border-radius:18px;background:var(--mint);color:var(--green);font:700 27px monospace;margin:0 auto 24px}.align-right{text-align:right;font-size:13px}.success-card{text-align:center}.success-card .button{margin-top:12px}
@media(min-width:1500px){.hero{padding:48px;min-height:390px}.hero-code{font-size:14px}.code-window{max-width:370px}.card-art{height:180px}.code-art{top:85px}}
@media(max-width:1200px){.sidebar{width:220px;padding:28px 16px}.workspace{margin-left:220px}.topbar{padding:0 28px}main{padding:28px}.hero{padding:27px;gap:10px}.hero-code{font-size:10px;padding:22px 17px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-footer{margin:0 28px}.group-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.sidebar{width:248px;transform:translateX(-100%);transition:transform .2s;box-shadow:15px 0 40px #20352e15;top:72px}.sidebar.is-open{transform:translateX(0)}.workspace{margin-left:0}.topbar{height:72px;position:relative;z-index:40;background:#fff}.menu-button{display:block}.topbar-label{margin-right:auto}.hero h1{font-size:32px}.sidebar-note{margin-top:35px}.sidebar-footer{margin-top:auto;padding-top:24px}.editor-columns{grid-template-columns:1fr 1fr}.article-panel{padding:30px}}
@media(max-width:600px){main{padding:22px 18px 38px}.topbar{padding:0 18px;gap:12px}.topbar-label{display:none}.account{margin-left:auto;gap:12px}.account-name{max-width:100px;font-size:12px}.account .avatar{display:none}.hero{grid-template-columns:1fr;padding:27px 23px;margin-bottom:32px}.hero h1{font-size:31px}.hero-art{margin:5px auto;width:100%;max-width:310px;padding:23px 10px}.hero-code{font-size:12px}.hero-copy>p{font-size:13px}.hero-copy .eyebrow{font-size:8px;letter-spacing:1.1px}.floating-badge{bottom:0}.section-heading{align-items:flex-start}.section-heading>.muted{display:none}h2{font-size:24px}.lesson-grid,.group-grid{grid-template-columns:1fr}.card-art{height:166px}.code-art{font-size:17px;top:77px}.card-content{padding:22px}.card-content p{font-size:13px}.searchbar{gap:8px;padding-left:12px}.searchbar>span{display:none}.searchbar .text-link{font-size:11px}.searchbar input{font-size:13px}.page-heading{flex-direction:column;align-items:flex-start;gap:19px}.page-heading .button{width:100%}.panel{padding:22px}.table-panel,.editor-panel{padding:0}.filter-bar{padding:18px}.filter-bar .field{flex-basis:100%}.table-scroll td,.table-scroll th{padding:16px}.form-grid{grid-template-columns:1fr}.article-panel{padding:24px 20px}.article-summary{font-size:15px}.article-header .card-meta{flex-wrap:wrap}.prose{font-size:14px}.prose pre{padding:16px}.editor-columns{grid-template-columns:1fr}.editor-source{border-right:0;border-bottom:1px solid var(--line)}.editor-source textarea{height:350px}.preview-body{height:350px}.toolbar-caption{display:none}.editor-toolbar{padding:9px;gap:2px}.editor-toolbar button{min-height:40px;min-width:38px}.save-bar{flex-direction:column;align-items:stretch;bottom:8px;padding:12px}.save-bar .button-row{flex-wrap:nowrap}.save-bar .button{flex:1}.save-bar .help-text{font-size:10px}.auth-shell{margin:20px auto 30px}.auth-card{padding:24px}.page-footer{margin:0 18px;font-size:9px;flex-wrap:wrap}.page-footer span:nth-child(2){display:none}.comment{gap:10px}.comment .avatar{width:30px;height:30px}.comment-heading{gap:5px 12px}.button{white-space:normal}.group-card{padding:24px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.sidebar,.topbar,.page-footer,.discussion,.breadcrumb,.skip-link{display:none}.workspace{margin:0}main{padding:0}.article-panel{border:0;padding:0}.prose pre{white-space:pre-wrap}body{background:#fff}}