*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--green:#1d9e75;--green-dark:#0b3d33;--green-deep:#072a23;--green-light:#e1f5ee;--green-mid:#4db896;--bg:#f7f9f8;--surface:#fff;--text:#22302c;--text-muted:#5f6b68;--border:#e2eae7;--amber-bg:#fff7e6;--amber-text:#7a4b00;--radius:20px;--radius-sm:12px;--shadow:0 10px 30px #0b3d3314;--max:1160px;--prose:720px}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font-family:Plus Jakarta Sans,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.6;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:var(--green)}a:hover{color:var(--green-dark)}:focus-visible{outline:3px solid var(--green-mid);outline-offset:3px;border-radius:6px}.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}.skip-link{z-index:200;background:var(--green-dark);color:#fff;border-radius:10px;padding:10px 16px;position:absolute;top:8px;left:-9999px}.skip-link:focus{left:16px}.site-header{z-index:100;-webkit-backdrop-filter:blur(14px);background:#f7f9f8f7;border-bottom:1px solid #1d9e751a;position:sticky;top:0}.site-header .container{justify-content:space-between;align-items:center;gap:16px;height:68px;display:flex}.brand{align-items:center;gap:10px;text-decoration:none;display:flex}.brand img{width:34px;height:34px}.brand span{color:var(--green-dark);letter-spacing:-.5px;font-size:21px;font-weight:800}.main-nav{align-items:center;gap:28px;display:flex}.main-nav a{color:var(--text);font-size:15px;font-weight:600;text-decoration:none}.main-nav a:hover,.main-nav a[aria-current=page]{color:var(--green)}.header-actions{align-items:center;gap:12px;display:flex}.lang-link{color:var(--text-muted);border:1px solid var(--border);border-radius:999px;padding:6px 10px;font-size:13px;font-weight:700;text-decoration:none}.lang-link:hover{color:var(--green-dark);border-color:var(--green-mid)}.mobile-learn{color:var(--green-dark);font-size:15px;font-weight:700;text-decoration:none;display:none}.mobile-learn[aria-current=page]{color:var(--green)}.btn{cursor:pointer;border:0;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:12px 22px;font-size:15px;font-weight:700;text-decoration:none;transition:transform .15s,background .15s;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--green);color:#fff}.btn-primary:hover{background:var(--green-dark);color:#fff}.btn-ghost{background:var(--green-light);color:var(--green-dark)}.btn-ghost:hover{color:var(--green-dark);background:#d3efe4}.store-buttons{flex-wrap:wrap;gap:12px;display:flex}.store-btn{background:var(--green-deep);color:#fff;border-radius:14px;align-items:center;gap:10px;min-width:170px;padding:10px 18px;text-decoration:none;transition:transform .15s,background .15s;display:inline-flex}.store-btn:hover{color:#fff;background:#000;transform:translateY(-1px)}.store-btn svg{flex-shrink:0;width:22px;height:22px}.store-btn small{opacity:.8;font-size:11px;line-height:1.2;display:block}.store-btn strong{font-size:17px;line-height:1.2;display:block}.store-buttons--light .store-btn{color:var(--green-deep);background:#fff}.store-buttons--light .store-btn:hover{background:var(--green-light);color:var(--green-deep)}.section{padding:96px 0}.section-label{letter-spacing:.08em;text-transform:uppercase;color:var(--green);background:var(--green-light);border-radius:999px;margin-bottom:18px;padding:6px 14px;font-size:13px;font-weight:700;display:inline-block}.section-title{color:var(--green-dark);letter-spacing:-1px;margin-bottom:16px;font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.15}.section-sub{color:var(--text-muted);max-width:640px;margin-bottom:48px;font-size:18px}.center{text-align:center}.center .section-sub{margin-left:auto;margin-right:auto}.grid{gap:24px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.card h3{color:var(--green-dark);margin-bottom:10px;font-size:20px;line-height:1.3}.card p{color:var(--text-muted);font-size:15px}.note-card{color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:10px;padding:26px;text-decoration:none;transition:transform .15s,box-shadow .15s,border-color .15s;display:flex}.note-card:hover{box-shadow:var(--shadow);border-color:var(--green-mid);color:inherit;transform:translateY(-3px)}.note-card .tag{color:var(--green-dark);background:var(--green-light);border-radius:999px;align-self:flex-start;padding:4px 10px;font-size:12px;font-weight:700}.note-card h3{color:var(--green-dark);font-size:19px;line-height:1.3}.note-card p{color:var(--text-muted);flex:1;font-size:15px}.note-card .meta{color:var(--text-muted);font-size:13px;font-weight:600}.notice{background:var(--amber-bg);color:var(--amber-text);border-radius:var(--radius-sm);align-items:flex-start;gap:12px;padding:16px 18px;font-size:14px;line-height:1.55;display:flex}.notice strong{color:var(--amber-text)}.site-footer{background:var(--green-deep);color:#ffffffbf;margin-top:0;padding:64px 0 32px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px;display:grid}.site-footer h4{color:#fff;letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px;font-size:14px}.site-footer a{color:#ffffffbf;margin-bottom:8px;font-size:15px;text-decoration:none;display:block}.site-footer a:hover,.site-footer .brand span{color:#fff}.footer-tagline{max-width:280px;margin-top:12px;font-size:15px}.footer-bottom{border-top:1px solid #ffffff1f;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:24px;font-size:13px;display:flex}.breadcrumbs{color:var(--text-muted);margin-bottom:18px;font-size:14px}.breadcrumbs a{color:var(--text-muted);text-decoration:none}.breadcrumbs a:hover{color:var(--green)}.breadcrumbs span[aria-hidden]{margin:0 6px}.article-header{padding:56px 0 32px}.article-header h1{color:var(--green-dark);letter-spacing:-1px;max-width:860px;margin-bottom:16px;font-size:clamp(32px,4.6vw,48px);line-height:1.12}.article-header .lede{color:var(--text-muted);max-width:760px;font-size:19px}.article-meta{color:var(--text-muted);flex-wrap:wrap;gap:8px 18px;margin-top:20px;font-size:14px;font-weight:600;display:flex}.article-layout{grid-template-columns:minmax(0, var(--prose)) 280px;align-items:start;gap:56px;padding-bottom:80px;display:grid}.article-layout>*{min-width:0}.prose{overflow-wrap:break-word}.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;font-size:14px;position:sticky;top:92px}.toc h2{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:12px;font-size:13px}.toc ol{gap:8px;list-style:none;display:grid}.toc a{color:var(--text);text-decoration:none}.toc a:hover{color:var(--green)}.toc .toc-cta{border-top:1px solid var(--border);margin-top:18px;padding-top:18px}.prose{color:var(--text);font-size:18px;line-height:1.75}.prose>*+*{margin-top:1.1em}.prose h2{color:var(--green-dark);letter-spacing:-.5px;margin-top:2em;scroll-margin-top:92px;font-size:28px;line-height:1.25}.prose h3{color:var(--green-dark);margin-top:1.6em;scroll-margin-top:92px;font-size:21px}.prose ul,.prose ol{padding-left:1.3em}.prose li+li{margin-top:.4em}.prose strong{color:var(--green-deep)}.prose sup{font-size:.7em;line-height:0}.prose sup a{font-weight:700;text-decoration:none}.prose blockquote{border-left:4px solid var(--green-mid);background:var(--green-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--green-deep);padding:14px 18px}.prose table{border-collapse:collapse;background:var(--surface);border-radius:var(--radius-sm);width:100%;font-size:16px;overflow:hidden}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--border);vertical-align:top;padding:12px 14px}.prose th{background:var(--green-light);color:var(--green-deep);font-size:14px}.table-wrap{overflow-x:auto}.faq{margin-top:56px}.faq h2{color:var(--green-dark);margin-bottom:18px;font-size:28px}.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px}.faq details+details{margin-top:12px}.faq summary{cursor:pointer;color:var(--green-dark);font-size:17px;font-weight:700}.faq details p{color:var(--text);margin-top:10px;font-size:16px}.references{border-top:1px solid var(--border);margin-top:56px;padding-top:32px}.references h2{color:var(--green-dark);margin-bottom:14px;font-size:22px}.references ol{color:var(--text-muted);gap:10px;padding-left:1.4em;font-size:15px;display:grid}.references li:target{background:var(--green-light);border-radius:8px}.references a{word-break:break-word}.app-cta{background:var(--green-dark);color:#fff;border-radius:var(--radius);grid-template-columns:1fr auto;align-items:center;gap:24px;margin-top:56px;padding:32px;display:grid}.app-cta h2{color:#fff;margin-bottom:8px;font-size:24px}.app-cta p{color:#ffffffbf;font-size:16px}@media (width<=1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:minmax(0,1fr)}.toc{position:static}}@media (width<=860px){.main-nav{display:none}.mobile-learn{display:inline}.grid-3{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.section{padding:72px 0}.app-cta{grid-template-columns:1fr}}@media (width<=560px){.container{padding:0 16px}.grid-4,.footer-grid{grid-template-columns:1fr}.prose{font-size:17px}.store-btn{flex:1;min-width:0;padding:10px 12px}.store-btn strong{white-space:nowrap;font-size:15px}.lang-link{display:none}.site-header .btn{padding:10px 16px;font-size:14px}.brand span{font-size:19px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}