:root{--ink:#19333b;--muted:#5b7075;--teal:#197b77;--teal-dark:#105d5a;--cream:#f6f4ee;--white:#fff;--blue:#e6f2f3;--orange:#ef9b55;--red:#bb5d52;--line:#d8e3e0;--shadow:0 8px 28px rgba(25,51,59,.08);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--cream);line-height:1.55}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}a{color:var(--teal-dark)}button,.button{font:inherit}.skip-link{position:absolute;left:-999px;top:8px;background:#fff;padding:8px;z-index:10}.skip-link:focus{left:8px}.container{width:min(1120px,calc(100% - 32px));margin:auto}.narrow{max-width:840px}.site-header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);line-height:1.05;font-size:.85rem}.brand-mark{display:grid;place-items:center;background:var(--teal);color:#fff;border-radius:12px;width:38px;height:38px;font-size:1.45rem}.brand strong{font-size:1rem}.site-header nav{display:flex;gap:16px;font-size:.9rem}.site-header nav a{text-decoration:none}.hero{background:linear-gradient(135deg,#e0f0ee,#f6f4ee 70%);padding:72px 0 64px}.hero-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.11em;font-size:.72rem;font-weight:800;color:var(--teal-dark);margin:0 0 10px}.hero h1{font-size:clamp(2rem,5vw,4rem);line-height:1.08;margin:0 0 20px;max-width:780px}.lead{font-size:1.16rem;color:var(--muted);max-width:680px}.hero-actions,.quiz-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:28px}.button{display:inline-block;border:0;border-radius:8px;padding:12px 18px;font-weight:750;text-decoration:none;cursor:pointer}.primary{background:var(--teal);color:#fff}.primary:hover,.primary:focus{background:var(--teal-dark)}.secondary{background:#fff;color:var(--teal-dark);border:1px solid var(--line)}.hero-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--shadow)}.shield{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;color:#fff;background:var(--teal);font-size:1.3rem}.hero-card h2{margin-bottom:8px}.hero-card p{color:var(--muted)}.progress-section{background:#fff;border-bottom:1px solid var(--line);padding:22px 0}.progress-heading{display:flex;justify-content:space-between;gap:16px;align-items:center}.progress-heading 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10px}.module-content>p{color:var(--muted)}.three-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0}.three-columns>div{background:#f5f9f7;border-radius:10px;padding:14px}.three-columns p{font-size:.92rem;color:var(--muted);margin-bottom:0}.steps{display:grid;gap:10px;margin:20px 0}.steps div{display:flex;gap:12px;align-items:flex-start}.steps b{flex:0 0 25px;height:25px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:var(--teal-dark);font-size:.85rem}.task{display:flex;gap:10px;align-items:flex-start;margin-top:22px;border-top:1px solid var(--line);padding-top:18px;font-weight:700}.task input,.security-list input,.quiz input{accent-color:var(--teal);min-width:18px;min-height:18px}details{border-top:1px solid var(--line);padding:14px 0}summary{cursor:pointer;font-weight:750}code,pre{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}code{background:#eef3f1;padding:2px 5px;border-radius:4px;font-size:.9em}.callout{padding:15px 17px;border-radius:10px;margin:18px 0}.info{background:#e9f4f4;border-left:4px solid var(--teal)}.warning{background:#fff2e4;border-left:4px solid var(--orange)}.code-copy,.prompt-box{background:#f5f7f5;border:1px solid var(--line);border-radius:10px;margin:16px 0;position:relative}.code-copy pre,.prompt-box pre{white-space:pre-wrap;overflow:auto;padding:17px;margin:0;font-size:.88rem}.copy-button{border:1px solid var(--teal);color:var(--teal-dark);background:#fff;border-radius:6px;padding:7px 10px;font-weight:700;cursor:pointer}.code-copy .copy-button{position:absolute;right:10px;top:10px}.prompt-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line)}.rating-row{display:flex;gap:8px;flex-wrap:wrap}.rating{padding:6px 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solid var(--line);border-radius:12px;padding:18px;cursor:pointer;color:var(--ink)}.choice:hover,.choice:focus,.choice.selected{border-color:var(--teal);box-shadow:0 0 0 3px #c8e4e1}.choice strong,.choice span{display:block}.choice span{color:var(--muted);margin-top:5px}.choice-result{background:#fff;border-left:4px solid var(--teal);padding:18px;margin-top:18px;min-height:56px}.quiz{display:grid;gap:16px}.quiz-question{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.quiz-question legend{font-weight:750;padding:0 0 10px}.quiz-option{display:block;margin:8px 0;color:var(--muted)}#quizResult{font-weight:750}.troubleshooting{display:grid;gap:8px}.troubleshooting details{background:#fff;padding:16px;border:1px solid var(--line);border-radius:9px}.troubleshooting details p{color:var(--muted);margin-bottom:0}.site-footer{padding:28px 0;background:var(--ink);color:#fff}.site-footer .container{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}.site-footer a{color:#c4e8e3}.toast{position:fixed;bottom:18px;left:50%;transform:translate(-50%,20px);opacity:0;background:var(--ink);color:#fff;padding:11px 16px;border-radius:8px;pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translate(-50%,0)}@media(max-width:700px){.container{width:min(100% - 24px,1120px)}.site-header nav{display:none}.hero{padding:48px 0}.hero-grid{grid-template-columns:1fr;gap:24px}.section{padding:48px 0}.module-card{grid-template-columns:1fr;padding:19px;gap:4px}.module-number{font-size:.95rem}.three-columns,.roadmap,.security-list{grid-template-columns:1fr}.security-list strong{grid-column:auto}.choice-grid{grid-template-columns:1fr}.progress-heading{align-items:flex-start;flex-direction:column}.workflow{align-items:stretch;flex-direction:column}.workflow b{text-align:center;transform:rotate(90deg)}.site-footer 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