/* K&A Gas Solutions Ltd. Brand: navy #0A2540, amber #F59E0B, charcoal #1F2937, light grey #F3F4F6, Inter. */
:root{
  --navy:#0A2540; --navy-2:#0E2F52; --navy-deep:#061A2E; --amber:#F59E0B; --amber-2:#FBB024; --amber-ink:#1A1300;
  --ink:#1F2937; --muted:#4B5563; --grey:#F3F4F6; --line:#E5E7EB; --white:#fff;
  --radius:12px; --max:1180px; --shadow:0 6px 20px rgba(10,37,64,.08);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;color:var(--navy);margin:0 0 .6rem}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.6rem,3.4vw,2.35rem);font-weight:800}
h3{font-size:1.18rem;font-weight:700}
p{margin:0 0 1rem}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--amber);color:var(--amber-ink);padding:8px 14px;border-radius:8px;z-index:300;font-weight:700}
.skip-link:focus{top:12px}
.wrap{width:min(var(--max),calc(100% - 40px));margin-inline:auto}
.amber{color:var(--amber)}
.ico{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* Top bar */
.topbar{background:var(--navy-deep);color:#D1D9E3;font-size:.86rem}
.topbar .wrap{display:flex;gap:22px;align-items:center;justify-content:space-between;min-height:38px;flex-wrap:wrap}
.topbar span,.topbar a{display:inline-flex;align-items:center;gap:7px;color:#D1D9E3;text-decoration:none}
.topbar .ico{width:16px;height:16px;color:var(--amber)}
.topbar .tb-left{display:flex;gap:22px;flex-wrap:wrap}
.topbar a:hover{color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:var(--navy);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:90px}
.brand{display:block;flex:none;line-height:0}
.brand img{width:188px;height:auto;border-radius:10px;background:#000}
.site-nav{margin-left:auto}
.nav-list{list-style:none;display:flex;align-items:center;gap:4px;margin:0;padding:0}
.nav-list a{display:block;color:#E6ECF2;text-decoration:none;font-weight:600;font-size:.95rem;padding:10px 12px;border-radius:8px}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-list a[aria-current="page"]{color:var(--amber)}
.header-call{flex:none}
.nav-toggle{display:none;margin-left:auto;background:transparent;border:1px solid rgba(255,255,255,.25);border-radius:10px;width:46px;height:44px;padding:0;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:#fff;margin:4px auto;border-radius:2px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font:inherit;font-weight:700;font-size:1rem;line-height:1.2;padding:14px 22px;border-radius:10px;border:2px solid transparent;text-decoration:none;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn .ico{width:20px;height:20px}
.btn-amber{background:var(--amber);color:var(--amber-ink)}
.btn-amber:hover{background:var(--amber-2)}
.btn-outline{border-color:rgba(255,255,255,.75);color:#fff;background:transparent}
.btn-outline:hover{background:#fff;color:var(--navy)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2)}
.btn-line{border-color:var(--navy);color:var(--navy);background:#fff}
.btn-line:hover{background:var(--navy);color:#fff}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}
.btn-sm{padding:10px 16px;font-size:.95rem}

/* Hero */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;min-height:540px}
.hero-copy{padding:64px 40px 64px 0;position:relative;z-index:2;align-self:center}
.hero h1{color:#fff;margin-bottom:.9rem}
.underline{display:block;width:84px;height:5px;border-radius:3px;background:var(--amber);margin:0 0 1.2rem}
.hero .sub{font-size:1.2rem;color:#D8E0EA;margin-bottom:1.4rem;max-width:34rem}
.hero .lead{color:#C3CEDB;max-width:34rem}
.badges{display:flex;flex-wrap:wrap;gap:12px 26px;margin:1.6rem 0 2rem;padding:0;list-style:none}
.badges li{display:flex;align-items:center;gap:10px;font-weight:600;color:#fff;font-size:.98rem}
.badges .ico{width:30px;height:30px;color:var(--amber);stroke-width:1.6}
.hero-photo{position:absolute;top:0;right:0;bottom:0;width:50%}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.hero-photo::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--navy) 0%,rgba(10,37,64,.55) 18%,rgba(10,37,64,0) 45%);z-index:1}

/* Page hero (inner pages) */
.page-hero{background:var(--navy);color:#fff;padding:52px 0 46px}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,4.4vw,3rem)}
.page-hero p{color:#D3DCE6;font-size:1.13rem;max-width:46rem;margin-bottom:0}
.crumbs{font-size:.85rem;margin:0 0 14px;color:#9FB0C3}
.crumbs a{color:#C9D5E2;text-decoration:none}
.crumbs a:hover{color:var(--amber)}

/* Sections */
.section{padding:72px 0}
.section.grey{background:var(--grey)}
.section-head{max-width:46rem;margin-bottom:34px}
.section-head.center{text-align:center;margin-inline:auto}
.section-head.center .underline{margin-inline:auto}
.section-head p{color:var(--muted)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#B45309;margin-bottom:8px}

/* Service cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card p{color:var(--muted);font-size:.97rem}
.tile{width:54px;height:54px;border-radius:10px;background:var(--navy);color:var(--amber);display:grid;place-items:center;margin-bottom:16px}
.tile .ico{width:28px;height:28px;stroke-width:1.6}
.more{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-weight:700;color:#B45309;text-decoration:none}
.more:hover{color:var(--navy)}
.more .ico{width:18px;height:18px}
a.card{text-decoration:none;color:inherit;transition:transform .15s,border-color .15s}
a.card:hover{transform:translateY(-2px);border-color:var(--amber)}

/* Split blocks */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.split.rev{grid-template-columns:.9fr 1.1fr}
.split.forms{grid-template-columns:1.15fr .85fr;gap:24px}
.photo{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
.answer{font-size:1.15rem;color:var(--ink);border-left:4px solid var(--amber);padding:4px 0 4px 16px;margin-bottom:1.4rem}
.ticks{list-style:none;padding:0;margin:0 0 1.4rem}
.ticks li{position:relative;padding:6px 0 6px 32px}
.ticks li::before{content:"";position:absolute;left:0;top:10px;width:20px;height:20px;border-radius:50%;background:var(--amber) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230A2540' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center/14px no-repeat}
.prose h2{margin-top:2rem}
.prose h2:first-child{margin-top:0}
.prose h3{margin-top:1.6rem}
.note{background:#FFF7E6;border:1px solid #FCD9A0;border-radius:10px;padding:16px 18px;margin:1.4rem 0}
.note strong{color:#92400E}
.side-box{background:var(--navy);color:#fff;border-radius:var(--radius);padding:26px;position:sticky;top:100px}
.side-box h3{color:#fff}
.side-box p{color:#C9D4E0}
.side-box .btn{width:100%;margin-top:10px}

/* Credentials */
.cred-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.cred{background:#fff;border:1px solid var(--line);border-left:4px solid var(--amber);border-radius:10px;padding:18px}
.cred .label{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#B45309;margin-bottom:4px}
.cred p{margin:0;font-weight:600;color:var(--navy)}

/* Stats strip */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.fact{background:#fff;border-radius:var(--radius);padding:22px;border:1px solid var(--line);text-align:center}
.fact strong{display:block;font-size:1.6rem;color:var(--navy);letter-spacing:-.02em}
.fact span{color:var(--muted);font-size:.95rem}

/* CTA band */
.cta-band{background:var(--navy);color:#fff;padding:72px 0}
.cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.cta-band h2{color:#fff}
.cta-band p{color:#C9D4E0}
.phone-box{display:flex;align-items:center;gap:18px;background:var(--amber);color:var(--amber-ink);border-radius:var(--radius);padding:22px 24px;text-decoration:none;margin:22px 0 14px}
.phone-box .ico{width:44px;height:44px;stroke-width:1.7;color:var(--navy)}
.phone-box small{display:block;font-weight:700;font-size:.85rem;text-transform:uppercase;letter-spacing:.08em}
.phone-box strong{display:block;font-size:clamp(1.6rem,3.4vw,2.2rem);letter-spacing:-.01em;color:var(--navy);line-height:1.1}
.phone-box:hover{background:var(--amber-2)}
.cta-links{display:flex;flex-wrap:wrap;gap:10px}
.cta-links a{color:#fff}

/* Forms */
.form{background:#fff;color:var(--ink);border-radius:var(--radius);padding:28px;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.form h3{margin-bottom:.3rem}
.form .hint{color:var(--muted);font-size:.95rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.wide{grid-column:1/-1}
.field label{font-weight:600;font-size:.92rem;color:var(--navy)}
.field label .opt{font-weight:400;color:var(--muted)}
input,select,textarea{font:inherit;font-size:16px;color:var(--ink);background:#fff;border:1.5px solid #CBD2DA;border-radius:9px;padding:12px 13px;width:100%}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(245,158,11,.25)}
.form .btn{width:100%;margin-top:16px}
.form-note{font-size:.85rem;color:var(--muted);margin:10px 0 0}
.form .hint,.cta-band .form .hint{color:var(--muted)}
.form .form-note,.cta-band .form .form-note{color:var(--muted)}
.form-msg{margin:10px 0 0;font-weight:600;color:#065F46}

/* Trust strip */
.trust{background:var(--grey);border-top:1px solid var(--line);padding:26px 0}
.trust ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trust li{display:flex;align-items:center;gap:12px;font-weight:700;color:var(--navy);font-size:.98rem;line-height:1.3}
.trust li small{display:block;font-weight:500;color:var(--muted);font-size:.85rem}
.trust .ico{width:34px;height:34px;color:var(--amber);stroke-width:1.6}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gallery button{padding:0;border:0;border-radius:10px;overflow:hidden;cursor:zoom-in;background:var(--grey);display:block}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .25s}
.gallery button:hover img{transform:scale(1.04)}
.lightbox{position:fixed;inset:0;z-index:400;background:rgba(3,12,22,.94);display:flex;align-items:center;justify-content:center;padding:56px 16px}
.lightbox[hidden]{display:none}
.lightbox img{max-height:calc(100vh - 140px);max-width:min(1200px,100%);width:auto;border-radius:8px}
.lightbox-caption{position:absolute;bottom:18px;left:16px;right:16px;text-align:center;color:#E5EBF1;font-size:.95rem}
.lightbox button{position:absolute;background:rgba(255,255,255,.12);color:#fff;border:0;border-radius:50%;width:48px;height:48px;font-size:1.8rem;line-height:1;cursor:pointer}
.lb-close{top:14px;right:14px}
.lb-prev{left:12px;top:50%;transform:translateY(-50%)}
.lb-next{right:12px;top:50%;transform:translateY(-50%)}

/* FAQ */
.faq{max-width:52rem}
.faq details{border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:12px}
.faq summary{cursor:pointer;list-style:none;padding:18px 52px 18px 20px;font-weight:700;color:var(--navy);position:relative;font-size:1.05rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:#B45309;font-weight:600}
.faq details[open] summary::after{content:"\2212"}
.faq details>div{padding:0 20px 16px}
.faq details p{margin-bottom:.6rem}

/* Owner */
.owner{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.owner .mono{width:64px;height:64px;border-radius:50%;background:var(--navy);color:var(--amber);display:grid;place-items:center;font-weight:800;font-size:1.3rem}

/* GasMate */
.tool{display:flex;gap:22px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:var(--navy);color:#fff;border-radius:var(--radius);padding:28px}
.tool h3{color:#fff;font-size:1.4rem}
.tool p{color:#C9D4E0;margin:0;max-width:38rem}

/* Footer */
.site-footer{background:var(--navy-deep);color:#AEBBCB;font-size:.95rem;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.site-footer h2{font-size:1rem;color:#fff;margin-bottom:12px;letter-spacing:0}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:0 0 7px}
.site-footer a{color:#D5DEE8;text-decoration:none}
.site-footer a:hover{color:var(--amber)}
.footer-logo img{width:150px;border-radius:10px;margin-bottom:14px}
.site-footer p{margin:0 0 6px}
.footer-meta{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:18px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:.85rem}
.emergency{background:#7F1D1D;color:#fff;font-size:.92rem;text-align:center;padding:9px 16px}
.emergency a{color:#fff;font-weight:700}

/* Mobile action bar */
.mobile-bar{display:none}

@media (max-width:1100px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;left:0;right:0;top:100%;background:var(--navy);border-top:1px solid rgba(255,255,255,.08);display:none;padding:8px 20px 18px;margin:0}
  .site-nav.is-open{display:block}
  .nav-list{flex-direction:column;align-items:stretch}
  .nav-list a{padding:13px 8px;font-size:1.05rem;border-bottom:1px solid rgba(255,255,255,.06);border-radius:0}
  .header-call{order:2}
  .nav-toggle{order:3;margin-left:0}
  .brand{margin-right:auto}
}
@media (max-width:900px){
  .gallery{grid-template-columns:repeat(3,1fr)}
  .hero-grid{grid-template-columns:1fr;min-height:0}
  .hero-copy{padding:40px 0 30px}
  .hero-photo{position:relative;width:auto;height:260px;margin:0 -20px}
  .hero-photo::before{background:linear-gradient(180deg,var(--navy) 0%,rgba(10,37,64,0) 35%)}
  .split,.split.rev,.split.forms,.cta-grid{grid-template-columns:1fr;gap:30px}
  .facts{grid-template-columns:1fr 1fr}
  .trust ul{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .side-box{position:static}
}
@media (max-width:760px){
  body{font-size:16px;padding-bottom:68px}
  .section{padding:52px 0}
  .cta-band{padding:52px 0}
  .topbar{font-size:.76rem}
  .topbar .wrap{justify-content:center;min-height:32px;padding:5px 0}
  .topbar .tb-left{gap:14px;flex-wrap:nowrap;white-space:nowrap}
  .topbar .tb-phone{display:none}
  .gallery{grid-template-columns:repeat(2,1fr);gap:8px}
  .card{padding:20px}
  .cards.compact{grid-template-columns:1fr 1fr;gap:10px}
  .cards.compact .card{padding:14px}
  .cards.compact .card p,.cards.compact .more{display:none}
  .cards.compact .tile{width:42px;height:42px;margin-bottom:10px}
  .cards.compact h3{font-size:1rem;margin:0}
  .header-inner{min-height:66px;gap:10px}
  .brand img{width:150px}
  .header-call{display:none}
  .form{padding:20px}
  .form-grid{grid-template-columns:1fr}
  .btn-row .btn{flex:1 1 auto}
  .mobile-bar{display:grid;grid-template-columns:1fr 1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:150;background:var(--navy);border-top:1px solid rgba(255,255,255,.12);padding:8px 8px calc(8px + env(safe-area-inset-bottom));gap:8px}
  .mobile-bar a{display:flex;align-items:center;justify-content:center;gap:7px;padding:12px 6px;border-radius:9px;font-weight:700;font-size:.95rem;text-decoration:none;color:#fff;background:rgba(255,255,255,.1)}
  .mobile-bar a.call{background:var(--amber);color:var(--amber-ink)}
  .mobile-bar .ico{width:19px;height:19px}
  .footer-grid{grid-template-columns:1fr}
  .phone-box{padding:18px}
  .phone-box .ico{width:36px;height:36px}
}
@media (max-width:420px){
  .trust ul{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr 1fr}
  .badges{gap:12px}
  .badges li{width:100%}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}