:root{--ink:#222132;--muted:#676579;--paper:#f8f7f4;--line:#e4e1eb;--purple:#6340b0;--deep:#29174a;--gold:#e6ba6b;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;line-height:1.65}a{color:var(--purple);text-underline-offset:4px}a:hover{color:#3c226e}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.6}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #aa85ed;outline-offset:4px}.skip{position:absolute;top:-70px;left:16px;z-index:99;background:white;padding:12px}.skip:focus{top:8px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:22px max(5vw,20px);border-bottom:1px solid var(--line);background:#fff}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;font-size:17px;letter-spacing:.17em;font-weight:850;color:var(--deep);line-height:1.15}.brand-mark{width:41px;height:44px;display:grid;place-items:center;border-radius:10px 10px 3px 10px;background:var(--deep);color:var(--gold);font:italic 32px Georgia,serif;letter-spacing:0}.brand-sub{display:block;font-size:9px;letter-spacing:.24em;margin-top:5px}nav{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:13px;font-weight:600}nav>a{text-decoration:none;color:var(--muted)}nav>a.active{color:var(--purple)}nav form{margin:0}.container{max-width:1220px;padding:40px 30px 0;margin:auto}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:9px;background:var(--purple);color:white;padding:12px 20px;font-weight:650;text-decoration:none;line-height:1.4}.button:hover{background:#4c2e8d;color:white}.button.secondary{background:white;color:var(--purple);border-color:var(--line)}.button.light{background:var(--gold);color:var(--deep)}.button.small{padding:9px 14px;font-size:13px}.text-button{border:0;background:none;color:var(--purple);padding:0}.hero{overflow:hidden;background:var(--deep);color:white;padding:56px;border-radius:24px;display:grid;grid-template-columns:1.25fr 1fr;gap:40px;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.17em;font-size:11px;font-weight:800;color:var(--purple);margin:0 0 15px}.hero .eyebrow{color:var(--gold)}h1,h2,h3{line-height:1.22;letter-spacing:-.035em;margin:0 0 18px}h1{font-size:clamp(32px,4.6vw,54px);font-weight:720}h2{font-size:28px}h3{font-size:20px}.hero p{color:#d9cfe9;max-width:560px}.hero .actions{margin-top:27px}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.code-window{background:#1d102f;border:1px solid #ffffff20;border-radius:14px;overflow:hidden;box-shadow:0 20px 35px #14091b40}.code-title{display:flex;gap:6px;align-items:center;border-bottom:1px solid #ffffff16;padding:13px 17px;color:#c2b4d6;font:12px monospace}.dot{height:7px;width:7px;background:#8a729f;border-radius:50%}.code-title span:last-child{margin-left:10px}.code-window pre{background:none;margin:0;color:#e8ddf6;font-size:13px;padding:22px}.code-caption{font-size:11px;padding:12px 18px;background:#ffffff06;color:#c2b4d6}.stats-strip{display:flex;justify-content:space-between;gap:24px;padding:24px 10px;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}.stats-strip strong{color:var(--ink);font-size:18px;margin-right:6px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin:45px 0 22px}.section-heading h2{margin-bottom:6px}.muted,.meta{color:var(--muted)}.small{font-size:13px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid.two{grid-template-columns:repeat(2,1fr)}.card{padding:28px;background:white;border:1px solid var(--line);border-radius:18px}.card>p:last-child{margin-bottom:0}.track-card{display:flex;flex-direction:column;min-height:260px;transition:transform .16s,border-color .16s}.track-card:hover{transform:translateY(-3px);border-color:#baa2d8}.track-card .actions{margin-top:auto;padding-top:20px}.track-card p{color:var(--muted);font-size:14px}.card-top{display:flex;justify-content:space-between;gap:10px;margin-bottom:30px}.track-number{font:28px Georgia,serif;color:#a99bbc}.pill{display:inline-flex;padding:4px 10px;border-radius:30px;background:#f0ebf7;color:var(--purple);font-size:11px;font-weight:700;align-items:center}.pill.green{background:#e6f4ed;color:#18725b}.pill.gold{background:#fff3d9;color:#806125}.principles{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin:35px 0}.principles strong{display:block;font-size:16px}.principles p{font-size:13px;color:var(--muted)}.site-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:15px;padding:27px 0;margin-top:55px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.site-footer a{color:var(--muted)}.page-title{margin-bottom:30px;max-width:850px}.page-title h1{font-size:40px}.breadcrumb{font-size:12px;margin-bottom:25px}.split{display:grid;grid-template-columns:250px minmax(0,1fr);gap:26px}.sidebar{align-self:start;position:sticky;top:20px}.sidebar a{display:block;text-decoration:none;border-radius:7px;padding:9px 12px;font-size:13px;color:var(--muted);margin:3px 0}.sidebar a.current{background:#efe8f7;color:var(--purple);font-weight:700}.lesson-content{font-size:16px;line-height:1.85;max-width:850px}.lesson-content h2,.lesson-content h3{margin-top:30px}.lesson-content a{overflow-wrap:anywhere}pre{background:#20172f;color:#ece2fc;padding:22px;border-radius:12px;overflow:auto;font-size:13px;line-height:1.7;white-space:pre-wrap;overflow-wrap:anywhere}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}p code,li code{background:#eee9f4;color:#4b3278;padding:2px 5px;border-radius:4px}blockquote{border-left:3px solid var(--purple);padding:10px 20px;margin:20px 0;background:#f5f0fb}.module-row{display:grid;grid-template-columns:40px 1fr auto;gap:20px;padding:23px 0;border-bottom:1px solid var(--line);align-items:center}.module-row:last-child{border:0}.module-row h3{font-size:17px;margin-bottom:5px}.module-row .meta{font-size:12px}.module-number{color:#a295b2;font-size:20px}.progress{height:6px;background:#ece7f3;border-radius:10px;overflow:hidden;margin:12px 0}.progress>span{display:block;background:var(--purple);height:100%}label{display:block;font-size:13px;font-weight:650;margin:18px 0 7px}input:not([type=radio]):not([type=checkbox]),textarea,select{width:100%;border:1px solid #d9d3e2;border-radius:8px;padding:11px 12px;background:white;color:var(--ink)}textarea{min-height:130px;resize:vertical}input[type=radio],input[type=checkbox]{accent-color:var(--purple)}.auth-box{max-width:480px;margin:25px auto}.auth-box .button{width:100%;margin-top:22px}.notice{padding:13px 17px;border-radius:8px;background:#f0eafa;color:#4f327e;font-size:14px;margin:15px 0}.notice.error{background:#fff0f0;color:#ae3444}.notice.success{background:#eaf7f0;color:#18725b}.question{padding:25px 0;border-bottom:1px solid var(--line)}.question fieldset{border:0;margin:0;padding:0}.question legend{font-weight:700;margin-bottom:13px}.choice{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);padding:13px 15px;border-radius:8px;font-weight:400;margin:8px 0;cursor:pointer}.choice:has(input:checked){border-color:var(--purple);background:#f6f2fd}.choice input{margin-top:6px}.result-item{padding:17px;border-left:3px solid #18725b;background:#f4faf7;margin:12px 0}.result-item.wrong{border-color:#ae3444;background:#fff5f4}.stat{font-size:32px;font-weight:750;color:var(--purple)}.lab-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.editor{background:#20172f!important;color:#f5eefe!important;min-height:380px;font:13px/1.6 ui-monospace,monospace!important;tab-size:4}.lab-output{min-height:250px;white-space:pre-wrap}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.check{display:flex;gap:10px;align-items:flex-start;font-weight:400}.check input{margin-top:6px}.callout{display:flex;justify-content:space-between;gap:25px;align-items:center;padding:30px;border-radius:18px;background:#efe9f6;margin-top:30px}.callout h3{margin-bottom:6px}.callout p{margin:0;color:var(--muted);font-size:14px}.language-select{max-width:150px}.empty{text-align:center;padding:50px 25px}.note-details{margin-top:18px;border-top:1px solid var(--line);padding-top:18px}.note-details summary{cursor:pointer;font-weight:650}.hidden{display:none!important}.project-brief{white-space:pre-line}table{width:100%;border-collapse:collapse}td,th{padding:12px;text-align:left;border-bottom:1px solid var(--line)}.overflow{overflow:auto}@media(max-width:1000px){.hero{padding:35px;gap:25px}.grid{grid-template-columns:repeat(2,1fr)}.site-header{align-items:flex-start;gap:20px}nav{gap:13px}.principles{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:210px 1fr}}@media(max-width:700px){.site-header{flex-direction:column;padding:18px 20px}nav{width:100%;font-size:12px}.container{padding:25px 18px 0}.hero{grid-template-columns:1fr;padding:29px 24px;gap:24px}.hero h1{font-size:38px}.code-window pre{font-size:12px}.stats-strip{flex-wrap:wrap;gap:12px 22px}.grid,.grid.two,.split,.lab-grid,.form-row{grid-template-columns:1fr}.sidebar{position:static}.card{padding:22px}.module-row{grid-template-columns:28px 1fr;gap:12px}.module-row>.actions{grid-column:2}.page-title h1{font-size:32px}.callout{flex-direction:column;align-items:flex-start}.section-heading{align-items:start;flex-direction:column;gap:8px}.site-footer{flex-direction:column}.principles{gap:15px}.hero .actions .button{width:100%}pre{padding:16px}.auth-box{margin:0 auto}h2{font-size:25px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.site-header .language-select select{width:auto;padding:7px;font-size:13px}.workspace-tools{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.workspace-tools>div{flex:1;min-width:200px}

.lesson-check{border-top:1px solid #ddd4e5;margin-top:32px;padding-top:24px}.certificate-sheet{background:#faf7ef;border:6px double #5a426f;padding:48px 28px;text-align:center;max-width:1000px;margin:auto}.certificate-sheet h2{font-size:clamp(24px,4vw,40px)}.certificate-name{font-size:clamp(26px,5vw,44px);color:#493361;overflow-wrap:anywhere}.certificate-sheet p{margin:18px 0}#quiz-result .button{margin:16px 12px 0 0}
