:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#222;background:#fcfcfc;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}header,main,footer{max-width:1180px;margin:auto;padding:28px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #e2e2e2;gap:24px}.brand{font-size:24px;font-weight:700;text-decoration:none}.brand span{display:block;font-size:11px;font-weight:400;letter-spacing:.06em;color:#666;margin-top:5px}nav,.actions{display:flex;align-items:center;gap:28px}.button{display:inline-block;background:#2d5a3f;color:#fff;border-radius:100px;padding:14px 23px;text-decoration:none;font-weight:600}.hero{padding:85px 0 70px}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#516154;font-weight:600}h1{font-size:clamp(36px,5.6vw,72px);line-height:1.06;letter-spacing:-.055em;font-weight:600;max-width:1000px}h1 em{font-family:inherit;font-weight:inherit;font-style:normal;color:#2d5a3f}p{line-height:1.8;color:#555;max-width:720px}.hero p,.lead{font-size:20px}.actions{margin-top:30px}section{margin-bottom:48px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:28px}.card{padding:30px;background:#f3f4f0;border:1px solid #e2e2e2;border-radius:22px;text-decoration:none;transition:transform .15s}.card:hover{transform:translateY(-3px)}.card h2{font-size:24px;letter-spacing:-.025em}.note{padding:32px;border:1px solid #dfe7df;background:#f4f7f3;border-radius:22px}article{max-width:850px;margin:55px auto}article h1{font-size:clamp(34px,5vw,58px)}article section{margin:38px 0}h2{letter-spacing:-.025em}pre{padding:20px;background:#edf1ed;border-radius:12px;overflow:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;padding:14px;border-bottom:1px solid #ddd}th{background:#f0f3ee}.table-wrap{overflow:auto}footer{border-top:1px solid #ddd;font-size:13px;margin-top:55px}.skip{position:absolute;left:12px;top:-100px}.skip:focus{top:10px;background:white;padding:15px;z-index:2}:focus-visible{outline:3px solid #4d8460;outline-offset:4px}@media(max-width:650px){header{align-items:flex-start}nav{gap:12px;flex-direction:column;align-items:flex-end;font-size:13px}header,main,footer{padding:20px}.hero{padding:40px 0}.actions{align-items:flex-start;flex-direction:column;gap:18px}.card{padding:23px}}@media(prefers-reduced-motion:reduce){.card{transition:none}}
.practice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.practice-grid label{display:flex;flex-direction:column;gap:6px;font-size:13px}.practice-grid input{font:inherit;padding:11px;width:100%;border:1px solid #b8c4b9;border-radius:8px;background:white;color:#222}.practice-formula,.practice-result{grid-column:1/-1}.practice-grid button{cursor:pointer;border:1px solid #b8c4b9;border-radius:20px;padding:12px;font:inherit}.practice-result{padding:18px;background:#e5eee4;font-weight:600;border-radius:12px}@media(max-width:500px){.practice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

.breadcrumbs{margin-top:24px;font-size:13px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}.breadcrumbs li+li::before{content:"/";padding-right:8px;color:#777}.article-languages{justify-content:flex-end;font-size:13px}.lesson-links{display:flex;gap:24px;flex-wrap:wrap}.lesson-links a{flex:1;min-width:180px}.lesson-links span{display:block;font-size:12px;color:#555;margin-bottom:6px}

.product-overview{padding:36px 0}.product-overview h2,.home-faq h2{font-size:clamp(28px,3.5vw,42px);max-width:740px}.product-overview h3{font-size:24px;letter-spacing:-.025em}.product-overview .card:hover{transform:none}.home-faq{max-width:850px;margin:65px auto}.home-faq details{border-bottom:1px solid #dfe3db;padding:22px 0}.home-faq summary{cursor:pointer;font-size:18px;font-weight:600;line-height:1.5}.home-faq details p{padding-left:22px}

.catalog-pagination{display:flex;flex-direction:row;justify-content:space-between;flex-wrap:wrap;gap:16px;margin:30px 0;font-size:14px}.catalog-pagination a{padding:10px 0}

.article-contents{display:block;background:#f3f4f0;border-radius:18px;padding:22px 28px;margin:28px 0}.article-contents h2{font-size:18px;margin-top:0}.article-contents ol{padding-left:22px;line-height:1.8}.article-contents a{font-size:15px}article section[id]{scroll-margin-top:24px}
.practice-demo-controls{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}.practice-demo-controls button{font:inherit;border:1px solid #b8c4b9;border-radius:24px;padding:10px 18px;background:white;color:#254a35;cursor:pointer}.practice-demo-controls button:first-child{background:#254a35;color:white}.practice-demo-controls button:disabled{opacity:.45;cursor:default}.practice-demo-controls [hidden]{display:none}.practice-demo-progress{min-height:1.6em;font-size:14px;overflow-wrap:anywhere}.practice-grid .practice-active{background:#e0eddf;outline:2px solid #3b714e;outline-offset:5px;border-radius:4px}.practice-grid input:focus-visible,.practice-demo-controls button:focus-visible{outline:3px solid #548064;outline-offset:3px}

.practice-table-wrap{grid-column:1/-1;overflow:auto}.practice-table{width:100%;border-collapse:collapse;background:white}.practice-table th{background:#e9efea;font-size:12px;text-align:center;padding:7px}.practice-table td{border:1px solid #d4ded5;padding:5px;min-width:100px}.practice-table label{font-size:10px;color:#687b6a}.practice-table input{padding:8px;border:0;border-radius:3px;min-width:80px}.practice-table .practice-active{outline-offset:0}

/* One UI family; emphasis uses weight and colour rather than a second typeface. */
button,input,select,textarea{font:inherit}h2,h3{font-weight:600;line-height:1.25}
table caption{caption-side:top;text-align:left;font-weight:600;font-size:14px;color:#36543f;padding:0 0 10px}
.compare-hub{max-width:1080px}.compare-article .card h3{font-size:20px;margin:10px 0}.compare-tldr{margin:24px 0 32px;border-left:4px solid #2d5a3f}.compare-tldr strong{display:block;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:#2d5a3f;margin-bottom:8px}.compare-tldr p{margin:0;max-width:none;color:#26382c}.compare-verdict-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0}.compare-verdict-grid .note{padding:24px}.compare-verdict-grid h2{font-size:20px;margin-top:0}.compare-verdict-grid ul{margin:0;padding-left:20px;line-height:1.7;color:#444}.compare-cta p{margin-bottom:0}.compare-related ul{line-height:1.9}@media(max-width:720px){.compare-verdict-grid{grid-template-columns:1fr}}