*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.75 system-ui,-apple-system,'Segoe UI',sans-serif;color:#193f36;background:#fff}a{color:#246f56}a:hover{text-decoration-thickness:2px}.container{max-width:1180px;padding:0 22px;margin:auto}h1,h2,h3{line-height:1.17;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,5vw,4.8rem);margin:14px 0 22px}h2{font-size:clamp(1.8rem,3vw,2.7rem);margin:0 0 15px}h3{font-size:1.25rem}.skip{position:absolute;top:-100px;left:10px;padding:10px;background:#fff}.skip:focus{top:10px}header{background:#fff;position:sticky;top:0;z-index:9;border-bottom:1px solid #dce8df}.nav{display:flex;gap:25px;justify-content:space-between;align-items:center;min-height:76px}.logo{font-weight:900;display:flex;gap:10px;line-height:1.1;align-items:center;text-decoration:none;color:#173f35;font-size:17px}.logo small{font-weight:500;display:block}.nav nav{display:flex;align-items:center;gap:16px}.nav nav a{font-size:12px;font-weight:700;text-decoration:none;color:#244b3e;white-space:nowrap}#toggle{display:none;border:1px solid #9eb4a5;border-radius:8px;background:white;padding:8px;cursor:pointer}.homehero{background:#19483d;color:#fff}.homegrid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center;min-height:570px}.homehero h1{font-size:clamp(3rem,6vw,5.7rem)}.homehero h1 em{font-style:normal;color:#d3e6a7}.homehero p{font-size:18px;color:#e3eee4;max-width:590px}.label,.kicker{font-size:12px;letter-spacing:.15em;font-weight:800;color:#3b8664}.pale{color:#cce8b5}.actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:34px}.btn{display:inline-block;background:#173f35;color:#fff;text-decoration:none;font-weight:800;padding:13px 21px;border-radius:7px;border:1px solid transparent;cursor:pointer;font-size:14px}.btn.light{background:#d5e8b1;color:#193d32}.btn.outline{border-color:#93b4a2;background:transparent;color:#fff}.illustration{position:relative;height:390px;background:linear-gradient(140deg,#487767,#285c50);border:1px solid #83a99a;border-radius:170px 170px 20px 20px;overflow:hidden}.sky{position:absolute;top:30px;left:52px;font-size:60px;color:#d2e7cf}.rain{position:absolute;top:120px;left:80px;color:#cce8d4;font-size:25px;letter-spacing:4px}.roof{position:absolute;bottom:120px;left:75px;width:230px;height:90px;background:#d9e9c0;clip-path:polygon(50% 0,100% 100%,0 100%)}.house{position:absolute;bottom:58px;left:95px;background:#d9e9c0;width:190px;height:100px}.tank{position:absolute;bottom:66px;right:38px;border:5px solid #d3e7c9;background:#92bdab;border-radius:16px;width:110px;height:125px;text-align:center;font-size:61px;line-height:1;color:#2a6656;padding-top:28px}.tank span{display:block;font-size:11px;font-weight:800;letter-spacing:2px}.illustration small{position:absolute;bottom:15px;left:0;right:0;text-align:center;font-weight:800;letter-spacing:2px;color:#d7e7d5}.strip{background:#eff4e8}.stripgrid{display:grid;grid-template-columns:repeat(3,1fr)}.stripgrid div{padding:24px 15px;border-right:1px solid #d2e1d5;font-weight:700;font-size:13px}.stripgrid b{color:#4e8c70;font-size:22px;margin-right:12px}.block{padding-top:78px;padding-bottom:78px}.block .wide{max-width:760px;color:#557267}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px;margin-top:25px}.card{display:flex;flex-direction:column;min-height:198px;padding:25px;border:1px solid #dce9df;border-radius:10px;text-decoration:none;color:#204536;transition:transform .2s,border-color .2s}.card:hover{transform:translateY(-3px);border-color:#7cb099}.card h3{margin:12px 0 8px}.card p{font-size:13px;color:#547166;margin:0}.tag{font-size:10px;letter-spacing:.12em;font-weight:900;color:#468365}.arrow{margin-top:auto;padding-top:20px;font-size:12px;font-weight:800;color:#32775b}.feature{background:#205647;color:#fff;padding:75px 0}.featuregrid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}.feature p{color:#deebe0;max-width:600px}.feature .btn{margin-top:17px}.formula{font-size:27px;font-weight:800;border:1px solid #7ba68f;background:#2b6756;padding:52px 27px;border-radius:12px;text-align:center}.formula span{color:#c5e5a9}.formula small{display:block;font-size:24px;color:#d9eab9;margin-top:14px}.cta{background:#eff4e8;padding:40px;border-radius:14px;display:flex;align-items:center;justify-content:space-between;gap:30px}.pagehero{background:#eff4e9;padding:70px 0}.pagehero h1{max-width:970px}.lead{font-size:19px;color:#506d61;max-width:800px}.article{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:65px;padding-top:65px;padding-bottom:85px}.intro{font-size:20px;line-height:1.85}.prose{max-width:870px}.prose p,.prose li{font-size:17px;line-height:1.9;color:#426156}.prose h2{margin-top:45px;font-size:27px}.prose details{border-bottom:1px solid #dce8df;padding:14px 0}.prose summary{font-weight:800;cursor:pointer}.notice{margin:26px 0;padding:20px 24px;background:#eff7ee;border-left:4px solid #439471}.aside{background:#eef4e8;padding:25px;border-radius:10px;height:max-content;font-size:14px}.aside p{color:#49675b}.placeholder{border:1px dashed #94ae9f;background:#fff;padding:15px;font-size:12px}.calcgrid{display:grid;grid-template-columns:1fr 1fr;gap:25px;padding-top:60px}.form,.results{padding:30px;border:1px solid #d9e7dd;border-radius:10px}.form{background:#f8faf4}.form label{display:block;font-weight:700;font-size:14px;margin:16px 0}.form input{display:block;width:100%;padding:12px;border:1px solid #9cb5a7;border-radius:7px;margin-top:7px;font:inherit}.form input:focus{outline:3px solid #b4d5bd}.results{background:#174638;color:white}.results p{color:#d7e8dd}.results .measure{padding:15px;background:#2b6251;margin:13px 0;border-radius:8px}.results strong{display:block;font-size:28px;color:#d6e8b2}.results small{font-size:12px}.scenarios{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.scenarios span{background:#316452;padding:12px;border-radius:6px;font-size:13px}.scenarios b{display:block;font-size:20px}.foot{display:flex;gap:30px;justify-content:space-between}.foot p{font-size:13px}.foot nav{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 23px}footer{background:#143b31;color:#d7e8dd;padding:65px 0 20px}footer a{color:#d7e8dd;text-decoration:none;font-size:13px}.fine{border-top:1px solid #426758;padding-top:20px;margin-top:45px;font-size:12px;color:#cadbd0}@media(max-width:1050px){.nav nav{gap:10px}.nav nav a{font-size:11px}}@media(max-width:820px){#toggle{display:block}.nav nav{display:none;position:absolute;top:76px;left:0;right:0;background:#fff;padding:20px;flex-direction:column;align-items:stretch;border-bottom:1px solid #dce8df}.nav nav.open{display:flex}.nav nav a{font-size:14px;padding:7px}.homegrid,.featuregrid{grid-template-columns:1fr;padding-top:55px;padding-bottom:55px}.illustration{max-width:490px;width:100%;margin:auto}.article,.calcgrid{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:550px){.container{padding:0 16px}.homehero h1{font-size:2.9rem}.homegrid{gap:30px}.illustration{height:290px}.roof{transform:scale(.75);transform-origin:bottom left}.house{transform:scale(.75);transform-origin:bottom left}.tank{transform:scale(.7);transform-origin:bottom right}.stripgrid,.grid,.scenarios{grid-template-columns:1fr}.stripgrid div{padding:13px 0;border-right:none;border-bottom:1px solid #d0e0d6}.block{padding-top:54px;padding-bottom:54px}.pagehero{padding:50px 0}.cta,.foot{display:block}.cta .btn{margin-top:16px}.foot nav{margin-top:25px;grid-template-columns:1fr 1fr}.article{gap:30px;padding-top:40px}.form,.results{padding:20px}}