*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#17202a;background:#fff;line-height:1.65}a{color:inherit;text-decoration:none}.container{width:min(1120px,92%);margin:auto}.narrow{max-width:760px}.site-header{border-bottom:1px solid #e8ebef;background:#fff;position:sticky;top:0;z-index:20}.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:1.28rem;font-weight:800;letter-spacing:-.04em}.brand span{font-weight:500}.nav{display:flex;gap:24px;font-size:.92rem;font-weight:600}.nav a:hover,.text-link:hover{opacity:.7}.menu-toggle{display:none;border:0;background:none;font-size:1.5rem}.hero{background:#f5f7f9;padding:90px 0 84px}.hero-grid{display:grid;grid-template-columns:1.45fr .75fr;gap:70px;align-items:center}.eyebrow{font-size:.74rem;letter-spacing:.13em;font-weight:800;margin:0 0 12px;color:#64707d}.hero h1{font-size:clamp(2.7rem,6vw,5rem);line-height:1.02;letter-spacing:-.06em;margin:0 0 24px;max-width:760px}.hero-copy{font-size:1.15rem;max-width:650px;color:#52606d}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-block;padding:13px 19px;border-radius:8px;font-weight:750}.btn-primary{background:#17202a;color:#fff}.btn-secondary{border:1px solid #ccd2d8}.hero-card{background:#fff;border:1px solid #e2e6ea;border-radius:14px;padding:30px;box-shadow:0 14px 40px rgba(23,32,42,.06)}.hero-card h2{font-size:1.65rem;line-height:1.15;margin:8px 0 12px}.card-label{font-size:.7rem;font-weight:800;letter-spacing:.12em;color:#697580}.text-link{font-weight:750}.section{padding:78px 0}.alt{background:#f7f8fa}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-heading h2,.narrow h2{font-size:2.2rem;line-height:1.1;letter-spacing:-.035em;margin:0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{border:1px solid #e3e7eb;border-radius:12px;padding:27px;transition:transform .15s,box-shadow .15s}.card:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(23,32,42,.07)}.card span{font-size:.72rem;font-weight:800;color:#75808b}.card h3{font-size:1.35rem;margin:18px 0 8px}.card p{color:#64707d;margin:0}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.tool-card{border:1px solid #dfe4e8;background:#fff;border-radius:12px;padding:25px;display:flex;flex-direction:column;gap:7px}.tool-card strong{font-size:1.2rem}.tool-card span{color:#64707d}.footer{border-top:1px solid #e5e8eb;padding:50px 0 25px;color:#64707d}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-links{display:flex;gap:20px;flex-wrap:wrap}.copyright{font-size:.82rem;border-top:1px solid #edf0f2;margin-top:35px;padding-top:20px}.article{padding:65px 0}.article-header{max-width:800px;margin-bottom:38px}.article h1{font-size:clamp(2.3rem,5vw,4rem);line-height:1.05;letter-spacing:-.05em;margin:0 0 18px}.article h2{font-size:1.7rem;margin-top:42px}.article p,.article li{font-size:1.05rem}.article ul,.article ol{padding-left:25px}.notice{padding:18px 20px;background:#f5f7f9;border-left:4px solid #17202a;border-radius:5px}.checklist li{margin:10px 0}.calculator{max-width:720px;border:1px solid #e1e5e9;border-radius:14px;padding:28px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:6px}.field input{width:100%;padding:12px;border:1px solid #ccd3da;border-radius:7px;font-size:1rem}.calc-results{margin-top:25px;padding:22px;background:#f5f7f9;border-radius:10px}.result-row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid #dde2e6}.result-row:last-child{border-bottom:0;font-weight:800}.small{font-size:.88rem;color:#68737d}@media(max-width:800px){.nav{display:none;position:absolute;left:4%;right:4%;top:72px;background:#fff;border:1px solid #e5e8eb;border-radius:10px;padding:18px;flex-direction:column;box-shadow:0 12px 30px rgba(0,0,0,.08)}.nav.open{display:flex}.menu-toggle{display:block}.hero{padding:65px 0}.hero-grid,.cards,.tool-grid{grid-template-columns:1fr}.hero-grid{gap:35px}.section-heading,.footer-grid{align-items:flex-start;flex-direction:column}.form-grid{grid-template-columns:1fr}}