@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');
:root{--ink:#10251d;--muted:#5d7168;--green:#087f52;--lime:#20c77a;--pale:#eaf8f0;--line:#dbe9e1;--shadow:0 18px 60px rgba(16,37,29,.08);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--ink);background:#f8fcfa;line-height:1.65}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.45;background-image:linear-gradient(rgba(8,127,82,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(8,127,82,.045) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,#000,transparent 78%);z-index:-1}a{color:var(--green);text-decoration:none}a:hover{text-decoration:none}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:22px;padding:14px clamp(18px,5vw,72px);background:rgba(248,252,250,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-family:'Space Grotesk',sans-serif;font-size:1.16rem;font-weight:700;white-space:nowrap}.brand b{color:var(--green)}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;color:white;background:linear-gradient(145deg,#0a9c63,#045b3c);box-shadow:0 8px 20px rgba(8,127,82,.25)}nav{display:flex;align-items:center;justify-content:flex-end;gap:4px;flex-wrap:wrap}nav a{padding:9px 12px;border-radius:10px;color:#3b5147;font-size:.92rem;font-weight:700}nav a:hover,nav a.active{background:var(--pale);color:var(--green)}.menu-toggle{display:none;border:1px solid var(--line);border-radius:10px;background:white;padding:9px 12px;font-size:1.1rem}.hero{position:relative;overflow:hidden;max-width:1280px;margin:28px auto 0;padding:clamp(44px,8vw,100px) clamp(22px,7vw,92px);border:1px solid var(--line);border-radius:32px;background:radial-gradient(circle at 90% 15%,rgba(32,199,122,.2),transparent 28%),linear-gradient(135deg,#f0fbf5,#fff);box-shadow:var(--shadow)}.hero:after{content:"";position:absolute;width:360px;height:360px;right:-150px;bottom:-180px;border:1px solid rgba(8,127,82,.18);border-radius:50%;box-shadow:0 0 0 35px rgba(8,127,82,.04),0 0 0 70px rgba(8,127,82,.035)}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:.78rem;font-weight:800;letter-spacing:.13em}.eyebrow:before{content:"";width:24px;height:3px;border-radius:4px;background:var(--lime)}h1,h2,h3{font-family:'Space Grotesk',sans-serif;line-height:1.12;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,6vw,5.6rem);max-width:850px;margin:22px 0 20px}h1 span{color:var(--green)}h2{font-size:clamp(1.8rem,3vw,2.7rem);margin:0 0 10px}h3{font-size:1.2rem;margin:0 0 8px}.hero p{max-width:720px;font-size:clamp(1rem,2vw,1.22rem);color:var(--muted)}.actions,.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.actions{margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--green);background:var(--green);color:#fff;padding:12px 18px;border-radius:12px;font-weight:800;box-shadow:0 8px 18px rgba(8,127,82,.16);cursor:pointer}.btn:hover{background:#056b44}.btn.secondary{background:#fff;color:var(--green);box-shadow:none}.section,.page-head,.lesson,.playground,.prose{max-width:1280px;margin:auto;padding:70px clamp(22px,5vw,72px)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:25px}.section-heading p,.lead{color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}.card,.lesson-card,.reference-list>*,.quiz,.example-panel{display:block;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.9);box-shadow:var(--shadow)}.card{padding:26px;transition:transform .2s,border-color .2s}.card:hover{transform:translateY(-5px);border-color:#8bdab4}.card p{color:var(--muted);margin-bottom:0}.card:before{content:"↗";display:grid;place-items:center;width:34px;height:34px;margin-bottom:22px;border-radius:10px;background:var(--pale);color:var(--green);font-weight:900}.green-panel{max-width:1280px;margin:0 auto 60px;border-radius:28px;background:linear-gradient(120deg,#073e2a,#0a8052);color:#fff;box-shadow:var(--shadow)}.green-panel p{max-width:700px;color:#d7f5e5}.page-head{padding-bottom:25px}.search{width:100%;padding:15px 17px;border:1px solid #bcd6c8;border-radius:13px;background:#fff;font:inherit;outline-color:var(--green)}.catalog{max-width:1280px;margin:auto;padding:10px clamp(22px,5vw,72px) 70px}.catalog-group{margin-bottom:38px}.catalog-group h2{padding-bottom:12px;border-bottom:1px solid var(--line)}.lesson-card{padding:17px 20px;margin:10px 0}.lesson-card a{font-weight:800}.lesson-card p{margin:5px 0 0;color:var(--muted)}.lesson{max-width:1000px}.lesson h1{font-size:clamp(2.2rem,5vw,4rem)}.lesson pre,.playground textarea,.playground pre{background:#10251d;color:#e6fff0;padding:20px;border-radius:14px;overflow:auto;border:1px solid #284b3c}.lesson code{font-family:ui-monospace,SFMono-Regular,monospace}.example-panel{padding:22px;margin:24px 0}.example-panel h3{color:var(--green)}.playground{display:grid;gap:18px}.playground textarea{min-height:300px;width:100%;font:14px/1.55 ui-monospace,monospace;resize:vertical}.toolbar select{padding:11px;border:1px solid var(--line);border-radius:10px;background:#fff}.preview{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:white}.playground iframe{display:block;width:100%;height:350px;border:0;background:#fff}.reference-list{max-width:1280px;margin:auto;padding:10px clamp(22px,5vw,72px) 70px;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}.reference-list>*{padding:24px}.prose{max-width:950px}.quiz{padding:24px;margin-top:30px}.quiz fieldset{border:0;border-bottom:1px solid var(--line);padding:18px 0}.quiz label{display:block;margin:9px 0;color:var(--muted)}.quiz-result{font-weight:800;color:var(--green);margin-top:16px}footer{display:grid;grid-template-columns:2fr 1fr 1fr;gap:35px;padding:55px clamp(22px,5vw,72px);background:#10251d;color:#e8fff1}footer a{display:block;color:#d7f5e5;margin:7px 0}footer p{color:#a9c7b7}.copyright{grid-column:1/-1;border-top:1px solid #315143;padding-top:20px}.empty{padding:25px;color:var(--muted)}@media(max-width:900px){nav{gap:0}nav a{padding:8px}.hero{margin:18px 18px 0}}@media(max-width:760px){.menu-toggle{display:block}nav{display:none;position:absolute;top:70px;left:0;right:0;padding:14px 18px;background:#f8fcfa;border-bottom:1px solid var(--line);box-shadow:0 15px 30px rgba(16,37,29,.08);flex-direction:column;align-items:stretch}nav.open{display:flex}nav a{padding:12px}.hero{border-radius:24px;padding:48px 24px}.section,.page-head,.lesson,.playground,.prose{padding:45px 22px}.section-heading{display:block}.section-heading p{margin-top:8px}footer{grid-template-columns:1fr}.copyright{grid-column:auto}}