:root{
  /* brand palette taken from the A M Enterprises signboard */
  --ink:#221f4d;             /* deep indigo — wordmark colour */
  --ink-soft:#3d3a63;
  --steel:#5c6478;
  --line:#dcdce8;
  --paper:#f3f3f7;
  --white:#ffffff;
  --indigo:#33357f;          /* primary UI */
  --indigo-dark:#25276a;
  --indigo-tint:#ecedf9;
  --gold:#f7d117;            /* logo yellow — highlights */
  --gold-dark:#d9ae00;
  --gold-tint:#fff8da;
  --red:#d02d2f;             /* chimney service line */
  --red-dark:#a92123;
  --red-tint:#fdeced;
  --blue:#1a6fb0;            /* RO service line */
  --blue-dark:#135688;
  --blue-tint:#e8f2fa;
  --wrap:1180px;
  --r:6px;
  --step--1:.875rem;
  --step-0:1.0625rem;
  --step-1:1.35rem;
  --step-2:1.8rem;
  --step-3:2.4rem;
  --step-4:3.1rem;
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--white);
  color:var(--ink-soft);
  font-family:"Karla","Segoe UI",system-ui,-apple-system,sans-serif;
  font-size:var(--step-0);
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:"Archivo","Segoe UI",system-ui,sans-serif;
  color:var(--ink);
  line-height:1.12;
  letter-spacing:-.02em;
  margin:0 0 .6em;
  font-weight:700;
}
h1{font-size:var(--step-4);font-weight:800}
h2{font-size:var(--step-3)}
h3{font-size:var(--step-1)}
h4{font-size:1.05rem;letter-spacing:0}
p{margin:0 0 1.1em;max-width:72ch}
a{color:var(--blue-dark);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--red-dark)}
img{max-width:100%;height:auto;display:block}
ul{padding-left:1.15rem}
li{margin-bottom:.45em}
strong{color:var(--ink)}

:focus-visible{outline:3px solid var(--gold-dark);outline-offset:2px}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:22px}
.section{padding:78px 0}
.section--tight{padding:54px 0}
.section--paper{background:var(--paper)}
.section--ink{background:var(--ink);color:#c7d0d6}
.section--ink h2,.section--ink h3{color:#fff}
.lede{font-size:1.15rem;color:var(--steel);max-width:62ch}
.section-head{max-width:62ch;margin-bottom:38px}

/* ---------- Header ---------- */
.topbar{background:var(--ink);color:#aeb9c2;font-size:.83rem}
.topbar .wrap{display:flex;gap:18px;justify-content:space-between;align-items:center;padding-block:8px;flex-wrap:wrap}
.topbar a{color:#fff;text-decoration:none}
.topbar a:hover{color:var(--gold)}
.topbar span{display:inline-flex;gap:7px;align-items:center}

.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:18px;padding-block:12px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;min-width:0}
.brand span{min-width:0}
.brand img{width:44px;height:44px;border-radius:50%}
.brand b{display:block;font-family:"Archivo",sans-serif;font-size:1.12rem;color:var(--ink);letter-spacing:-.02em;line-height:1.1}
.brand small{display:block;font-size:.74rem;color:var(--steel);letter-spacing:.02em}

.nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0;align-items:center}
.nav li{margin:0}
.nav a{color:var(--ink-soft);text-decoration:none;font-weight:600;font-size:.97rem;padding-block:6px;border-bottom:2px solid transparent}
.nav a:hover{color:var(--ink);border-bottom-color:var(--gold-dark)}
.nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--gold-dark)}
.nav .nav-cta{background:var(--indigo);color:#fff;padding:10px 18px;border-radius:var(--r);border:0}
.nav .nav-cta:hover{background:var(--indigo-dark);color:#fff}

.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--r);padding:9px 12px;cursor:pointer}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:"Archivo",sans-serif;font-weight:600;font-size:1rem;
  padding:14px 24px;border-radius:var(--r);border:2px solid transparent;
  text-decoration:none;cursor:pointer;transition:background .18s ease,color .18s ease;
}
.btn--primary{background:var(--indigo);color:#fff}
.btn--primary:hover{background:var(--indigo-dark);color:#fff}
.btn--water{background:var(--blue);color:#fff}
.btn--flame{background:var(--red);color:#fff}
.btn--flame:hover{background:var(--red-dark);color:#fff}
.btn--water:hover{background:var(--blue-dark);color:#fff}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{background:var(--gold);color:var(--ink)}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(180deg,#fff 0%,var(--paper) 100%);border-bottom:1px solid var(--line);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;padding:66px 0 58px}
.hero h1{max-width:16ch}
.hero p{font-size:1.13rem;color:var(--steel);max-width:52ch}
.hero-tag{display:inline-flex;align-items:center;gap:10px;background:var(--gold-tint);border:1px solid #f0dd8e;color:#7a5c00;
  font-size:.84rem;font-weight:700;padding:7px 14px;border-radius:100px;margin-bottom:20px}
.hero-tag i{width:8px;height:8px;background:var(--gold-dark);border-radius:50%;display:inline-block}
.hero-art{position:relative}
.hero-art img{width:100%;border-radius:12px;box-shadow:0 18px 44px rgba(34,31,77,.16)}

.hero-facts{display:grid;grid-template-columns:repeat(3,auto);gap:30px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line);max-width:520px}
.hero-facts b{display:block;font-family:"Archivo",sans-serif;font-size:1.5rem;color:var(--ink)}
.hero-facts span{font-size:.86rem;color:var(--steel);line-height:1.35;display:block}

/* ---------- Trust strip ---------- */
.strip{background:var(--ink);color:#cfd7dd}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;padding-block:26px}
.strip div{display:flex;gap:11px;align-items:flex-start;font-size:.94rem;line-height:1.45}
.strip svg{flex:0 0 22px;margin-top:2px}

/* ---------- Service cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cards--2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--red);border-radius:var(--r);padding:26px 24px;display:flex;flex-direction:column}
.card[data-line="ro"]{border-top-color:var(--blue)}
.card[data-line="gas"]{border-top-color:var(--gold-dark)}
.card img{width:100%;aspect-ratio:20/13;object-fit:cover;border-radius:4px;margin-bottom:18px;background:var(--paper)}
.card h3{font-size:1.18rem;margin-bottom:.45em}
.card p{font-size:.97rem;color:var(--steel);margin-bottom:1em}
.card ul{font-size:.93rem;color:var(--steel);margin:0 0 18px}
.card .card-link{margin-top:auto;font-weight:700;font-size:.94rem;text-decoration:none;color:var(--red-dark)}
.card[data-line="ro"] .card-link{color:var(--blue-dark)}
.card[data-line="gas"] .card-link{color:var(--gold-dark)}
.card .card-link:hover{text-decoration:underline}
.card .tagline{font-size:.8rem;font-weight:700;color:var(--red-dark);margin-bottom:10px}
.card[data-line="ro"] .tagline{color:var(--blue-dark)}
.card[data-line="gas"] .tagline{color:var(--gold-dark)}

/* ---------- Detail service block ---------- */
.svc{display:grid;grid-template-columns:.85fr 1.15fr;gap:46px;align-items:center;padding:46px 0;border-bottom:1px solid var(--line)}
.svc:last-of-type{border-bottom:0}
.svc--flip .svc-art{order:2}
.svc-art img{width:100%;aspect-ratio:20/13;object-fit:cover;border-radius:8px;border:1px solid var(--line);background:var(--paper)}
.svc h3{font-size:1.55rem}
.price{display:inline-block;background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--red);
  padding:9px 16px;border-radius:4px;font-size:.94rem;color:var(--ink);font-weight:600;margin-bottom:6px}
.price[data-line="ro"]{border-left-color:var(--blue)}
.price[data-line="gas"]{border-left-color:var(--gold-dark)}

/* ---------- Steps (real sequence) ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.step{position:relative;padding-top:22px;border-top:2px solid var(--line)}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-17px;left:0;background:var(--indigo);color:#fff;
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-family:"Archivo",sans-serif;font-weight:700;font-size:.95rem}
.step h4{margin-top:10px}
.step p{font-size:.94rem;color:var(--steel);margin:0}

/* ---------- Split / feature list ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split img{width:100%;border-radius:10px}
.ticks{list-style:none;padding:0;margin:0}
.ticks li{position:relative;padding-left:30px;margin-bottom:14px}
.ticks li::before{content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:3px;
  background:var(--blue-tint);border:1px solid var(--blue);}
.ticks li::after{content:"";position:absolute;left:5px;top:11px;width:5px;height:9px;border-right:2px solid var(--blue-dark);
  border-bottom:2px solid var(--blue-dark);transform:rotate(42deg)}

/* ---------- Areas ---------- */
.areas{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;padding:0;list-style:none}
.areas li{margin:0;background:#fff;border:1px solid var(--line);border-radius:100px;padding:7px 16px;font-size:.9rem;color:var(--ink-soft)}

/* ---------- Brands ---------- */
.brands{display:flex;flex-wrap:wrap;gap:12px;list-style:none;padding:0;margin:22px 0 0}
.brands li{margin:0;border:1px dashed #3b464f;border-radius:4px;padding:9px 18px;font-family:"Archivo",sans-serif;font-size:.95rem;color:#e3e9ed}

/* ---------- Reviews ---------- */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.review p{font-size:.98rem;margin-bottom:16px}
.review b{display:block;font-family:"Archivo",sans-serif;color:var(--ink);font-size:.97rem}
.review small{color:var(--steel)}
.stars{color:var(--gold-dark);letter-spacing:2px;font-size:.95rem;margin-bottom:10px}

/* ---------- FAQ ---------- */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-family:"Archivo",sans-serif;font-weight:600;font-size:1.05rem;color:var(--ink);list-style:none;
  display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold-dark);font-size:1.5rem;line-height:1;flex:0 0 auto}
.faq details[open] summary::after{content:"\2013"}
.faq p{margin:12px 0 0;font-size:.98rem;color:var(--steel)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--indigo);color:#fff}
.cta-band .wrap{display:flex;gap:30px;justify-content:space-between;align-items:center;padding-block:44px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .3em;font-size:var(--step-2)}
.cta-band p{margin:0;color:#dfe0f6;max-width:52ch}

/* ---------- Forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:30px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;font-size:.92rem;color:var(--ink);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid #c9d2d1;border-radius:4px;background:#fff;
  font-family:inherit;font-size:1rem;color:var(--ink)}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);outline:2px solid var(--blue-tint)}
.form-note{font-size:.86rem;color:var(--steel)}
.form-msg{display:none;margin-top:14px;padding:12px 14px;border-radius:4px;background:var(--blue-tint);border:1px solid var(--blue);font-size:.93rem;color:var(--blue-dark)}
.form-msg.show{display:block}
.form-msg--error{background:var(--red-tint);border-color:var(--red);color:var(--red-dark)}
.hp-field{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden;margin:0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}

/* ---------- Contact blocks ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.info-list{list-style:none;padding:0;margin:0}
.info-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.info-list svg{flex:0 0 22px;margin-top:3px}
.info-list b{display:block;font-family:"Archivo",sans-serif;color:var(--ink);font-size:1rem}
.info-list a{text-decoration:none}
.map{border:1px solid var(--line);border-radius:8px;overflow:hidden;line-height:0}
.map iframe{width:100%;height:340px;border:0}

/* ---------- Legal pages ---------- */
.legal{max-width:78ch}
.legal h2{font-size:1.5rem;margin-top:2em}
.legal h3{font-size:1.12rem;margin-top:1.6em}
.legal p,.legal li{color:var(--ink-soft)}
.updated{font-size:.9rem;color:var(--steel);border-left:3px solid var(--gold-dark);padding-left:14px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#9fabb5;font-size:.94rem;padding-top:58px}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1.1fr;gap:36px;padding-bottom:40px}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:1em}
.site-footer a{color:#c3ccd4;text-decoration:none}
.site-footer a:hover{color:var(--gold)}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px}
.footer-brand{display:flex;gap:12px;align-items:center;margin-bottom:16px}
.footer-brand img{width:44px;height:44px;border-radius:50%}
.footer-brand b{font-family:"Archivo",sans-serif;color:#fff;font-size:1.1rem;display:block}
.footer-bottom{border-top:1px solid #2c353c;padding:20px 0;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:.87rem}
.footer-bottom ul{display:flex;gap:20px}
.footer-bottom li{margin:0}
.seo-line{font-size:.84rem;color:#7b8791;padding-bottom:26px;line-height:1.6;max-width:none}

/* ---------- Floating actions ---------- */
.float{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:10px;z-index:70}
.float a{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;box-shadow:0 6px 16px rgba(20,24,27,.24);text-decoration:none}
.float .f-call{background:var(--indigo)}
.float .f-call:hover{background:var(--indigo-dark)}
.float .f-wa{background:#25d366}

/* ---------- Breadcrumb ---------- */
.crumb{background:var(--paper);border-bottom:1px solid var(--line);font-size:.86rem;color:var(--steel)}
.crumb .wrap{padding-block:12px}
.crumb a{color:var(--steel);text-decoration:none}
.crumb a:hover{color:var(--red-dark)}

/* ---------- Page head ---------- */
.page-head{padding:54px 0 44px;border-bottom:1px solid var(--line)}
.page-head--photo{position:relative;isolation:isolate;background:var(--ink) center/cover no-repeat;border-bottom:0;padding:76px 0 68px}
.page-head--photo::before{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(92deg,rgba(34,31,77,.97) 0%,rgba(34,31,77,.93) 40%,rgba(34,31,77,.55) 66%,rgba(34,31,77,.18) 100%)}
.page-head--photo::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:var(--gold)}
.page-head--photo h1{color:#fff;max-width:18ch}
.page-head--photo p{color:#dcdef2;max-width:40ch}
@media (max-width:980px){
  .page-head--photo{padding:56px 0 50px}
  .page-head--photo::before{background:linear-gradient(180deg,rgba(34,31,77,.95),rgba(34,31,77,.88))}
  .page-head--photo h1,.page-head--photo p{max-width:none}
}
.page-head h1{font-size:var(--step-3);max-width:20ch}
.page-head p{max-width:64ch;color:var(--steel);font-size:1.1rem;margin-bottom:0}

/* ---------- Motion ---------- */
@media (prefers-reduced-motion:no-preference){
  .hero h1,.hero p,.hero .hero-tag,.hero .btn-row,.hero-facts{animation:rise .6s cubic-bezier(.2,.7,.3,1) backwards}
  .hero .hero-tag{animation-delay:.05s}
  .hero h1{animation-delay:.12s}
  .hero p{animation-delay:.2s}
  .hero .btn-row{animation-delay:.28s}
  .hero-facts{animation-delay:.36s}
}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  :root{--step-4:2.4rem;--step-3:1.95rem;--step-2:1.55rem}
  .hero-grid,.split,.contact-grid,.svc{grid-template-columns:1fr;gap:32px}
  .svc--flip .svc-art{order:0}
  .cards,.reviews,.steps,.strip .wrap{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav{position:absolute;top:100%;left:0;right:0;display:none;background:#fff;padding:8px 22px 26px;
    border-bottom:1px solid var(--line);box-shadow:0 12px 28px rgba(34,31,77,.14);max-height:calc(100vh - 120px);overflow-y:auto}
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:stretch;gap:0}
  .nav li{border-bottom:1px solid var(--line)}
  .nav a{display:block;padding:14px 0;border:0}
  .nav .nav-cta{text-align:center;margin-top:16px;padding:14px}
  .menu-toggle{display:block;z-index:80}
  .site-header{position:sticky}
}
@media (max-width:620px){
  :root{--step-4:2.05rem}
  .header-inner{gap:10px}
  .brand img{width:38px;height:38px}
  .brand b{font-size:1rem}
  .brand small{font-size:.68rem;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}
  .brand b{white-space:nowrap}
  .topbar .wrap{justify-content:center;gap:8px}
  .topbar .wrap span:first-child{display:none}
  .topbar a{white-space:nowrap}
  .section{padding:54px 0}
  .cards,.reviews,.steps,.strip .wrap,.footer-grid,.grid-2{grid-template-columns:1fr}
  .hero-facts{grid-template-columns:1fr 1fr;gap:18px}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
  .footer-bottom{flex-direction:column;gap:10px}
}

@media print{.float,.site-header,.topbar{display:none}}