:root{--bg:#F6F4FF;--ink:#17123A;--blue:#3A2CFF;--sun:#FFC83D;--pink:#FF5C8A;--mint:#19C9A0;--sh:5px 5px 0 var(--ink)}*{box-sizing:border-box;margin:0}body{background:var(--bg);color:var(--ink);font-family:var(--sans),system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}h1{font-size:clamp(2.4rem,6vw,4.4rem);line-height:1.02;letter-spacing:-.03em;font-weight:800}h2{font-size:clamp(1.6rem,3vw,2.3rem);letter-spacing:-.02em;margin:0 0 1.5rem}.wrap{max-width:1160px;margin:0 auto;padding:2.5rem 1.25rem}.lead{font-size:1.15rem;max-width:56ch;margin:1.2rem 0 1.8rem}code{font-family:var(--mono);background:var(--sun);padding:.05em .35em;border-radius:6px;font-size:.9em}.hdr{justify-content:space-between;padding:1rem 1.25rem;max-width:1160px;margin:0 auto}.hdr,.hdr nav{display:flex;align-items:center}.hdr nav{gap:1.2rem;font-weight:600}.logo{font-weight:800;font-size:1.35rem;display:flex;gap:.5rem;align-items:center}.logo span{background:var(--blue);color:#fff;font-family:var(--mono);padding:.1rem .5rem;border-radius:10px 4px 10px 4px;transform:rotate(-4deg);transition:transform .3s}.logo:hover span{transform:rotate(6deg) scale(1.1)}.lang{display:flex;border:2px solid var(--ink);border-radius:99px;overflow:hidden}.lang button{background:none;border:0;padding:.25rem .7rem;font:inherit;font-weight:700;cursor:pointer}.lang .on{background:var(--ink);color:#fff}.btn{display:inline-block;background:var(--blue);color:#fff;border:2px solid var(--ink);border-radius:14px;padding:.8rem 1.4rem;font:inherit;font-weight:700;cursor:pointer;box-shadow:var(--sh);transition:transform .15s,box-shadow .15s}.btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--ink)}.btn:active{transform:translate(4px,4px);box-shadow:1px 1px 0 var(--ink)}.btn:disabled{opacity:.6}.btn.alt{background:var(--mint);color:var(--ink)}:focus-visible{outline:3px solid var(--pink);outline-offset:3px}.hero{display:grid;grid-template-columns:1.1fr 1fr;grid-gap:3rem;gap:3rem;align-items:center;padding-top:3rem}.editor{background:var(--ink);color:#fff;border:2px solid var(--ink);border-radius:18px;box-shadow:8px 8px 0 var(--pink);transform:rotate(1.5deg);animation:float 6s ease-in-out infinite;overflow:hidden}.editor .bar{display:flex;gap:.4rem;align-items:center;padding:.7rem 1rem;background:#241C5C}.editor .bar i{width:11px;height:11px;border-radius:50%;background:var(--sun)}.editor .bar i:nth-child(2){background:var(--pink)}.editor .bar i:nth-child(3){background:var(--mint)}.editor .bar b{margin-left:auto;font:500 .8rem var(--mono);opacity:.7}.editor pre{font:500 1.05rem/1.7 var(--mono);padding:1.2rem 1.4rem;min-height:9rem;color:var(--sun)}.caret{display:inline-block;width:2px;height:1.1em;background:#fff;vertical-align:-.15em;animation:blink 1s steps(2) infinite}.editor ul{list-style:none;padding:0 1.4rem 1.3rem;font:.95rem var(--mono)}.editor li{opacity:.45;transition:all .3s}.editor li.pass{opacity:1;color:var(--mint);transform:translateX(6px)}@keyframes float{50%{transform:rotate(-.5deg) translateY(-10px)}}@keyframes blink{50%{opacity:0}}.marquee{overflow:hidden;background:var(--ink);color:var(--sun);padding:.8rem 0;margin:2rem 0;transform:rotate(-1deg);font:700 1.1rem var(--mono)}.marquee div{display:flex;width:max-content;animation:slide 30s linear infinite}.marquee span{white-space:pre;padding-right:1rem}@keyframes slide{to{transform:translateX(-50%)}}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));grid-gap:1.6rem;gap:1.6rem}.step{background:#fff;border:2px solid var(--ink);border-radius:22px 8px 22px 8px;box-shadow:var(--sh);padding:1.6rem;transition:transform .2s,box-shadow .2s;display:block;animation:rise .6s var(--d,0s) backwards}.step:nth-child(2){border-radius:8px 22px 8px 22px}.step:hover{transform:translate(-3px,-5px) rotate(-.6deg);box-shadow:9px 11px 0 var(--ink)}.step em{display:grid;place-items:center;width:3.4rem;height:3.4rem;background:var(--c);border:2px solid var(--ink);border-radius:50%;font:800 1.2rem var(--mono);font-style:normal;color:var(--ink);margin-bottom:1rem;transition:transform .4s}.step:hover em{transform:rotate(1turn)}.step small{font-weight:600;opacity:.65}@keyframes rise{0%{opacity:0;transform:translateY(24px)}}.prog{height:10px;border:2px solid var(--ink);border-radius:9px;margin-top:1rem;overflow:hidden}.prog i{display:block;height:100%;background:var(--mint);transition:width .6s}.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:2rem;gap:2rem;padding-bottom:5rem}.feats div{border-top:4px solid var(--ink);padding-top:1rem}.lesson{display:grid;grid-template-columns:260px 1fr;grid-gap:2rem;gap:2rem;align-items:start}.lesson aside{display:flex;flex-direction:column;gap:.6rem;position:-webkit-sticky;position:sticky;top:1rem}.lesson aside button{display:flex;gap:.6rem;align-items:center;text-align:left;background:#fff;border:2px solid var(--ink);border-radius:12px;padding:.6rem .8rem;font:inherit;font-weight:600;cursor:pointer;transition:transform .15s}.lesson aside button:hover{transform:translateX(4px)}.lesson aside button.on{background:var(--c);box-shadow:3px 3px 0 var(--ink)}.lesson aside span{display:grid;place-items:center;min-width:1.7rem;height:1.7rem;border-radius:50%;background:var(--ink);color:#fff;font:700 .8rem var(--mono)}.back{font-weight:600;opacity:.7}.pane{animation:rise .4s}.pane h1{font-size:clamp(1.8rem,4vw,2.8rem)}textarea{width:100%;min-height:240px;background:var(--ink);color:var(--sun);font:500 1rem/1.7 var(--mono);padding:1.1rem;border:2px solid var(--ink);border-radius:16px;box-shadow:var(--sh);resize:vertical;-moz-tab-size:2;tab-size:2}.row{display:flex;gap:1rem;flex-wrap:wrap;margin:1.4rem 0;align-items:center}.results{list-style:none;padding:0;font-family:var(--mono);display:grid;grid-gap:.4rem;gap:.4rem}.results li.pass{color:#0b8f70;font-weight:700;animation:pop .35s}.results li.fail{color:#d6204f;font-weight:700}@keyframes pop{50%{transform:scale(1.06) translateX(6px)}}.msg{margin-top:1rem;font-weight:700}.msg.ok{color:#0b8f70}input{font:inherit;padding:.75rem 1rem;border:2px solid var(--ink);border-radius:14px;min-width:260px}.cert{margin:2rem auto;max-width:820px;aspect-ratio:1.414;background:#fff;border:3px solid var(--ink);box-shadow:10px 10px 0 var(--c);padding:3rem;text-align:center;display:flex;flex-direction:column;justify-content:center;gap:.6rem;position:relative}.cert:before{content:"";position:absolute;inset:12px;border:2px dashed var(--ink);pointer-events:none}.cert h1{font-size:2.4rem}.cert h2{font-size:2.6rem;margin:1rem 0 0;border-bottom:3px solid var(--c);display:inline-block;align-self:center;padding:0 2rem}.cert 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