:root{--navy:#102a43;--navy2:#173f5f;--teal:#0f766e;--teal2:#115e59;--ink:#17212b;--muted:#5d6b78;--line:#dfe8e5;--soft:#eef8f6;--cream:#f7faf9;--white:#fff;--shadow:0 18px 50px rgba(16,42,67,.10);--max:1160px}
*{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:var(--ink);line-height:1.55;background:#fff}a{text-decoration:none;color:inherit}.container{width:min(calc(100% - 40px),var(--max));margin:auto}
.topbar{background:var(--navy);color:#dbe8ef;font-size:13px}.topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}.topbar a{color:#fff;font-weight:800}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}header .nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:900;letter-spacing:-.035em;color:var(--navy);font-size:18px}.brand span{color:var(--teal)}
header nav{display:flex;align-items:center;gap:25px;font-size:14px;font-weight:750;color:#425466}header nav a:hover{color:var(--teal)}.nav-dropdown{position:relative}.nav-dropdown summary{list-style:none;cursor:pointer;color:#425466}.nav-dropdown summary::-webkit-details-marker{display:none}.nav-dropdown summary:after{content:"▾";font-size:10px;margin-left:5px}.nav-dropdown[open] summary,.nav-dropdown summary:hover{color:var(--teal)}.nav-dropdown-menu{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%);min-width:245px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;box-shadow:var(--shadow);display:none;gap:2px}.nav-dropdown[open]>.nav-dropdown-menu{display:grid}.nav-dropdown-menu a{display:block;padding:10px 12px;border-radius:9px;white-space:nowrap}.nav-dropdown-menu a:hover{background:var(--soft)}@media(min-width:901px){.nav-dropdown:hover>.nav-dropdown-menu{display:grid}.nav-dropdown>summary{cursor:pointer}}.nav-cta{background:var(--teal);color:#fff!important;padding:11px 17px;border-radius:999px;box-shadow:0 7px 18px rgba(15,118,110,.18)}
.menu{display:none;border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 10px;font-size:20px}
.hero{background:linear-gradient(135deg,#eef8f6 0%,#f8fbfa 58%,#eef3f7 100%);border-bottom:1px solid var(--line)}.hero>.container{min-height:570px;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:55px;padding:65px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal2);font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.11em;margin-bottom:15px}.eyebrow:before{content:"";width:28px;height:2px;background:var(--teal)}
h1{font-size:clamp(42px,5.1vw,68px);line-height:1.08;letter-spacing:-.055em;margin:0 0 22px;color:var(--navy)}.hero-lead{font-size:19px;line-height:1.55;color:#536575;max-width:650px;margin:0 0 30px}
.actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:14px 21px;font-weight:850;font-size:15px}.btn-primary,.primary{background:var(--teal);color:#fff;box-shadow:0 10px 24px rgba(15,118,110,.2)}.btn-secondary{background:#fff;color:var(--navy);border:1px solid #cfddd9}
.hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px;color:#5b6c78;font-size:13px;font-weight:650}.hero-note span{display:flex;align-items:center;gap:7px}.check{width:19px;height:19px;border-radius:50%;display:grid;place-items:center;background:#d7eee9;color:var(--teal2);font-style:normal;font-size:12px}
.hero-visual{position:relative}.visual-card{position:relative;min-height:430px;border-radius:26px;background:linear-gradient(145deg,#173f5f,#102a43);box-shadow:var(--shadow);overflow:hidden;padding:28px}.visual-card:before{content:"";position:absolute;width:330px;height:330px;border-radius:50%;right:-120px;top:-110px;background:rgba(255,255,255,.08)}
.tank{position:absolute;left:50%;top:49%;transform:translate(-50%,-50%);width:190px;height:290px;border-radius:92px 92px 26px 26px;background:linear-gradient(100deg,#d8e0e4,#fff 35%,#b9c7cf 78%,#8ea1ac);box-shadow:inset -18px 0 28px rgba(16,42,67,.12),0 22px 35px rgba(0,0,0,.25)}.tank:before{content:"";position:absolute;top:-8px;left:9px;right:9px;height:30px;border-radius:50%;background:#e9eef0;box-shadow:inset 0 -5px 8px rgba(0,0,0,.12)}.tank:after{content:"";position:absolute;left:28px;right:28px;bottom:27px;height:72px;border-radius:12px;background:#173f5f;box-shadow:inset 0 0 0 5px #284e68}.pipe{position:absolute;width:14px;height:92px;background:#bdc9cf;top:0;left:35px;border-radius:0 0 7px 7px}.pipe.r{left:auto;right:35px}
.visual-label{position:absolute;left:28px;bottom:26px;color:#fff;z-index:2}.visual-label strong{display:block;font-size:18px}.visual-label span{font-size:12px;color:#bfd0dc}.badge{position:absolute;right:24px;top:25px;background:#fff;color:var(--navy);padding:10px 13px;border-radius:12px;font-size:12px;font-weight:850;box-shadow:0 10px 24px rgba(0,0,0,.15);z-index:3}
.hero-photo{padding:0;min-height:430px}.hero-photo img{display:block;width:100%;height:430px;object-fit:cover}.hero-photo .photo-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,42,67,.08) 35%,rgba(16,42,67,.78) 100%);z-index:1}.hero-photo .badge,.hero-photo .visual-label{z-index:2}.home-feature-image{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin:0 0 34px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 7px 24px rgba(16,42,67,.04)}.home-feature-image img{display:block;width:100%;height:240px;object-fit:cover;border-radius:14px}.home-feature-image p{color:var(--muted);margin:0;font-size:15px;line-height:1.65}.section-photo{display:block;width:100%;height:240px;object-fit:cover;border-radius:18px;margin:0 0 28px;box-shadow:0 10px 30px rgba(16,42,67,.08)}
.trust-strip{background:#fff;border-bottom:1px solid var(--line)}.trust-strip .container{display:grid;grid-template-columns:repeat(3,1fr)}.trust-strip .trust-item{padding:20px 24px;display:flex;align-items:center;gap:13px;border-right:1px solid var(--line)}.trust-strip .trust-item:last-child{border-right:0}.trust-icon{width:38px;height:38px;border-radius:11px;background:var(--soft);color:var(--teal2);display:grid;place-items:center;font-weight:900;flex:none}.trust-item strong{display:block;color:var(--navy);font-size:14px}.trust-item span{font-size:12px;color:var(--muted)}
/* Legacy site sections, upgraded visually */
.trust{display:none}.section{padding:88px 0}.section.alt{background:var(--cream)}.section-head{max-width:760px;margin-bottom:40px}.section-head .eyebrow{margin-bottom:10px}.section-head p{color:var(--muted);font-size:17px;margin:0}
h2{font-size:clamp(31px,3.7vw,46px);line-height:1.15;letter-spacing:-.045em;color:var(--navy);margin:7px 0 14px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:27px;min-height:215px;box-shadow:0 7px 24px rgba(16,42,67,.04);transition:.2s}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c7ddd8}.card h3{margin:0 0 9px;color:var(--navy);font-size:19px}.card p{margin:0 0 17px;color:var(--muted);font-size:14px;line-height:1.55}.arrow{color:var(--teal2);font-weight:850;font-size:13px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:65px}.split p{color:var(--muted)}.checklist{list-style:none;padding:0;margin:25px 0 0}.checklist li{padding:11px 0 11px 28px;border-bottom:1px solid var(--line);position:relative;color:#526371}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:27px;display:flex;gap:18px}.step-no{width:36px;height:36px;border-radius:50%;background:var(--soft);color:var(--teal2);display:grid;place-items:center;font-weight:900;flex:none}.step h3{margin:0 0 7px;color:var(--navy);font-size:19px}.step p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}
.section .cta{background:var(--navy);border-radius:22px;padding:48px 52px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px;box-shadow:var(--shadow)}.cta h2{color:#fff;margin:0 0 9px;font-size:34px}.cta p{margin:0;color:#c8d6df;max-width:680px}.cta .btn{white-space:nowrap}
footer{background:#0b2032;color:#aebfcb;padding:44px 0 90px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:50px}.footer-brand{color:#fff;font-weight:900;font-size:18px}.footer-grid p{font-size:13px;max-width:430px}.footer-links strong{color:#fff}.footer-links a{display:block;font-size:13px;margin:7px 0;color:#c7d5dd}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:20px;font-size:12px}.footer-disclaimer{display:block;margin-top:7px;font-size:10px;line-height:1.5;opacity:.72}
.content-hero{padding:62px 0 38px;background:linear-gradient(135deg,#eef8f6,#f8fbfa);border-bottom:1px solid var(--line)}.content-hero h1{font-size:clamp(38px,5vw,58px)}.content{padding:65px 0}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:55px}.content-main h2{font-size:31px;margin-top:35px}.content-main h2:first-child{margin-top:0}.content-main p,.content-main li{color:#526371;font-size:16px;line-height:1.65}.side-card{background:var(--soft);border:1px solid #d2e8e3;border-radius:18px;padding:24px;position:sticky;top:105px}.side-card h3{color:var(--navy);margin-top:0}.side-card a{display:block;padding:9px 0;border-bottom:1px solid #d2e3df;color:var(--teal2);font-weight:750;font-size:14px}
.mobile-call{display:none}
@media(max-width:900px){header nav{display:none}.menu{display:block}.hero>.container{grid-template-columns:1fr;gap:38px}.hero-visual{max-width:620px;width:100%}.cards{grid-template-columns:1fr 1fr}.split{grid-template-columns:1fr;gap:35px}.steps{grid-template-columns:1fr}.content-grid{grid-template-columns:1fr}.side-card{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.container{width:min(calc(100% - 28px),var(--max))}.topbar .container{justify-content:center;text-align:center}header .nav{min-height:68px}h1{font-size:43px}.hero>.container{padding:48px 0}.hero-lead{font-size:17px}.visual-card{min-height:360px}.tank{transform:translate(-50%,-50%) scale(.82)}.trust-strip .container{grid-template-columns:1fr}.trust-strip .trust-item{border-right:0;border-bottom:1px solid var(--line);padding:15px 4px}.trust-strip .trust-item:last-child{border-bottom:0}.section{padding:65px 0}.cards{grid-template-columns:1fr}.section .cta{display:block;padding:38px 28px}.cta h2{font-size:29px}.cta .btn{margin-top:22px}.footer-grid{grid-template-columns:1fr;gap:25px}.content-hero{padding:45px 0 30px}.content{padding:45px 0}.mobile-call{display:block;position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--teal);color:#fff;text-align:center;padding:13px;font-weight:850;box-shadow:0 -8px 25px rgba(0,0,0,.12)}}

/* SEO/content-page presentation */
.page-hero{padding:62px 0 42px;background:linear-gradient(135deg,#eef8f6,#f8fbfa);border-bottom:1px solid var(--line)}
.page-hero .container{max-width:900px}.page-hero h1{font-size:clamp(38px,5vw,58px);margin-bottom:16px}.page-hero p{font-size:18px;color:var(--muted);max-width:760px;margin:0}
.content{max-width:820px}.content .notice{background:var(--soft);border:1px solid #d2e8e3;border-radius:15px;padding:18px 20px;margin-bottom:34px;color:#405563}.content .notice a{color:var(--teal2);font-weight:850}.content h2{font-size:30px;margin:42px 0 12px}.content h2:first-of-type{margin-top:0}.content h3{color:var(--navy);font-size:20px;margin-top:30px}.content p,.content li{color:#526371;font-size:16px;line-height:1.65}.content ul{padding-left:22px}.content a:not(.btn){color:var(--teal2);font-weight:700}.related{margin-top:50px;padding:26px;border:1px solid var(--line);background:#fff;border-radius:18px}.related h2{font-size:24px;margin:0 0 15px}.related-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.related-links a{padding:11px 13px;background:var(--cream);border-radius:10px;font-size:14px}
@media(max-width:620px){.page-hero{padding:45px 0 30px}.page-hero h1{font-size:42px}.page-hero p{font-size:16px}.content{padding-top:45px}.related-links{grid-template-columns:1fr}}

@media(max-width:900px){header nav.mobile-open{display:flex;position:absolute;top:68px;left:0;right:0;background:#fff;padding:18px 20px;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--line);box-shadow:0 15px 25px rgba(16,42,67,.08)}header nav.mobile-open .nav-dropdown-menu{position:static;transform:none;box-shadow:none;border:0;padding:4px 0 4px 12px;min-width:0}header nav.mobile-open .nav-dropdown-menu a{white-space:normal}}
@media(min-width:901px){.footer-grid:has(>:nth-child(4)){grid-template-columns:1.3fr 1fr 1fr 1.2fr}}

/* Blog presentation */
.blog-hero{padding:62px 0 42px;background:linear-gradient(135deg,#eef8f6,#f8fbfa);border-bottom:1px solid var(--line)}
.blog-hero .container{max-width:900px}.blog-hero h1{font-size:clamp(40px,5vw,60px);margin-bottom:14px}.blog-hero p{font-size:18px;color:var(--muted);max-width:720px;margin:0;line-height:1.55}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.blog-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 7px 24px rgba(16,42,67,.04);transition:.2s}.blog-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c7ddd8}.blog-card.featured{grid-column:span 2;display:grid;grid-template-columns:1.05fr .95fr}.blog-card img{display:block;width:100%;height:220px;object-fit:cover}.blog-card.featured img{height:100%;min-height:300px}.blog-card-body{padding:23px}.blog-card .eyebrow{margin-bottom:9px}.blog-card h2,.blog-card h3{color:var(--navy);margin:0 0 10px;font-size:21px;line-height:1.2;letter-spacing:-.025em}.blog-card.featured h2{font-size:30px}.blog-card p{color:var(--muted);font-size:14px;line-height:1.6;margin:0 0 16px}.blog-meta{font-size:12px;color:#73818c;font-weight:700;margin-bottom:12px}.blog-link{color:var(--teal2);font-weight:850;font-size:13px}.blog-article-hero{padding:52px 0 36px;background:linear-gradient(135deg,#eef8f6,#f8fbfa);border-bottom:1px solid var(--line)}.blog-article-hero .container{max-width:980px}.blog-article-hero h1{font-size:clamp(40px,5vw,60px);margin-bottom:15px}.blog-article-hero .lead{font-size:18px;color:var(--muted);max-width:780px;margin:0;line-height:1.55}.featured-image{display:block;width:100%;max-width:980px;height:390px;object-fit:cover;border-radius:22px;margin:0 auto;box-shadow:var(--shadow)}.blog-article{max-width:820px;padding:56px 0 72px}.blog-article h2{font-size:30px;margin:42px 0 12px}.blog-article h2:first-child{margin-top:0}.blog-article h3{font-size:20px;color:var(--navy);margin:30px 0 8px}.blog-article p,.blog-article li{font-size:17px;line-height:1.7;color:#526371}.blog-article ul{padding-left:22px}.blog-article .notice{background:var(--soft);border:1px solid #d2e8e3;border-radius:15px;padding:18px 20px;margin:0 0 32px;color:#405563}.blog-article a:not(.btn){color:var(--teal2);font-weight:750}.blog-article .related{margin-top:45px}.blog-article .cta{margin-top:46px}
@media(max-width:900px){.blog-grid{grid-template-columns:1fr 1fr}.blog-card.featured{grid-column:span 2}}
@media(max-width:620px){.blog-grid{grid-template-columns:1fr}.blog-card.featured{grid-column:span 1;display:block}.blog-card.featured img{height:220px}.blog-card.featured h2{font-size:25px}.blog-hero{padding:45px 0 30px}.blog-hero h1,.blog-article-hero h1{font-size:42px}.featured-image{height:240px;border-radius:16px}.blog-article{padding:42px 0 58px}.blog-article p,.blog-article li{font-size:16px;line-height:1.65}}
@media(max-width:620px){.hero-photo,.hero-photo img{min-height:360px;height:360px}.home-feature-image{grid-template-columns:1fr;padding:10px}.home-feature-image img{height:210px}.section-photo{height:210px}}

/* Homepage lower-section spacing and FAQ presentation */
.process-section{padding-bottom:52px}
.faq-section{padding-top:52px;padding-bottom:52px;background:var(--cream)}
.faq-container{max-width:1100px}
.faq-section .section-head{max-width:760px;margin-bottom:28px}
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:21px 23px;box-shadow:0 5px 18px rgba(16,42,67,.035)}
.faq-item h3{color:var(--navy);font-size:17px;line-height:1.35;margin:0 0 9px}
.faq-item p{color:var(--muted);font-size:14px;line-height:1.6;margin:0}
.faq-item a{color:var(--teal2);font-weight:750}
.related-section{padding-top:34px;padding-bottom:34px}
.related-section .related{margin-top:0}
.final-cta-section{padding-top:34px}
@media(max-width:620px){
  .process-section{padding-bottom:34px}
  .faq-section{padding-top:38px;padding-bottom:38px}
  .faq-grid{grid-template-columns:1fr;gap:12px}
  .faq-item{padding:18px 19px}
  .related-section{padding-top:28px;padding-bottom:28px}
  .final-cta-section{padding-top:28px}
}