:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:#18344a;background:#f3f8f6;font-size:16px;line-height:1.7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}a{color:#08766e;text-underline-offset:3px}a:hover{color:#034d49}a:focus-visible{outline:3px solid #84c83d;outline-offset:3px}header{background:#083f42;color:#fff}header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 24px}.brand{font-size:1.15rem;font-weight:800;letter-spacing:.04em;color:#fff;text-decoration:none}.brand span{color:#a8df55}nav{display:flex;gap:18px;flex-wrap:wrap}nav a{color:#e7f6f0;text-decoration:none;font-size:.93rem}nav a[aria-current=page]{color:#c5fa79;text-decoration:underline;text-underline-offset:5px}.wrap{max-width:1100px;margin:auto}.hero{background:linear-gradient(145deg,#0b4f50,#08766e);color:#fff;padding:64px 24px 58px}.hero p{max-width:760px;color:#e2f4ed}.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.16em;font-weight:800;color:#a8df55}.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.15;margin:12px 0 20px}.hero .meta{font-size:.91rem;color:#d5e9e5}.layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:34px;align-items:start;padding:38px 24px 70px}.toc{position:sticky;top:20px;background:#fff;border:1px solid #dfebe7;border-radius:16px;padding:20px;box-shadow:0 4px 20px #0b42400b}.toc strong{display:block;margin-bottom:10px}.toc a{display:block;padding:5px 0;font-size:.9rem;text-decoration:none}.content{background:#fff;border:1px solid #dfebe7;border-radius:18px;padding:38px 44px;box-shadow:0 8px 28px #0b42400b}.content h2{font-size:1.45rem;line-height:1.3;margin:42px 0 14px;color:#124f51;scroll-margin-top:20px}.content h2:first-child{margin-top:0}.content h3{font-size:1.08rem;margin:24px 0 8px;color:#145f5b}.content p,.content li{max-width:76ch}.content ul,.content ol{padding-left:1.35rem}.content li{margin:6px 0}.callout{background:#eaf7ed;border-left:4px solid #79bc43;border-radius:8px;padding:15px 18px;margin:22px 0}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding:38px 24px 70px}.card{background:#fff;border:1px solid #dbeae5;border-radius:16px;padding:25px;text-decoration:none;color:inherit;box-shadow:0 8px 28px #0b42400b}.card h2{color:#08766e;margin:0 0 8px}.card p{margin:0}.plain-list{list-style:none;padding:0!important}.plain-list li{border-bottom:1px solid #e6eeeb;padding:8px 0}footer{background:#e6f1ed;padding:26px 24px;color:#315b58;font-size:.9rem}footer .wrap{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}footer a{margin-right:15px}@media(max-width:820px){.layout{display:block}.toc{position:static;margin-bottom:24px}.content{padding:26px 22px}.cards{grid-template-columns:1fr}.hero{padding:48px 24px}header .wrap{align-items:flex-start;flex-direction:column}nav{gap:13px}}