/* CDA Heating & Cooling — redesign
   Palette pulled from the live site: navy, blue, red, gold */
:root{
  --navy:#102536;
  --navy-2:#0d2f4f;
  --blue:#2a7ab5;
  --blue-light:#4aa4d9;
  --blue-dark:#00508c;
  --red:#e02424;
  --red-dark:#c41e1e;
  --gold:#d9972b;
  --gold-dark:#b07419;
  --ink:#1a2330;
  --body:#42546a;
  --muted:#6b7c90;
  --line:#e6edf3;
  --bg:#ffffff;
  --bg-soft:#f4f8fb;
  --bg-soft-2:#eaf3fb;
  --white:#fff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 18px 45px rgba(16,37,54,.10);
  --shadow-lg:0 30px 70px rgba(16,37,54,.18);
  --maxw:1180px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--body);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{color:var(--ink);line-height:1.15;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5vw,3.5rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.6rem)}
h3{font-size:1.25rem}
p{margin:0 0 1rem}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:clamp(56px,8vw,110px) 0}
.section--soft{background:var(--bg-soft)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.section-head{max-width:720px;margin:0 auto 56px;text-align:center}
.section-head p{font-size:1.08rem;color:var(--muted)}
.lead{font-size:1.18rem;color:var(--body)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;font-weight:700;font-size:1rem;padding:15px 30px;border-radius:999px;border:2px solid transparent;cursor:pointer;transition:.25s ease;white-space:nowrap}
.btn--red{background:var(--red);color:#fff;box-shadow:0 12px 26px rgba(224,36,36,.32)}
.btn--red:hover{background:var(--red-dark);transform:translateY(-2px)}
.btn--blue{background:var(--blue);color:#fff;box-shadow:0 12px 26px rgba(42,122,181,.3)}
.btn--blue:hover{background:var(--blue-dark);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn--outline{background:#fff;color:var(--navy);border-color:var(--line)}
.btn--outline:hover{border-color:var(--blue);color:var(--blue)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:18px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy);font-size:1.15rem;flex-shrink:0;white-space:nowrap}
.brand .mark{width:42px;height:42px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--navy));display:grid;place-items:center;color:#fff;font-size:1.1rem;box-shadow:var(--shadow)}
.brand small{display:block;font-size:.66rem;font-weight:600;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;flex-wrap:nowrap}
.nav-links a{padding:10px 14px;border-radius:9px;font-weight:600;font-size:.96rem;color:var(--ink);transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--blue);background:var(--bg-soft-2)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-phone{font-weight:800;color:var(--navy);font-size:1.02rem}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:44px;height:44px;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle span{height:3px;width:26px;background:var(--navy);border-radius:2px;transition:.3s}

/* hero */
.hero{position:relative;color:#fff;background:linear-gradient(120deg,rgba(13,29,46,.92),rgba(13,47,79,.78)),url('../img/hero-bg.jpg') center/cover no-repeat;padding:clamp(70px,11vw,140px) 0}
.hero-inner{max-width:760px}
.hero .badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:8px 16px;border-radius:999px;font-size:.85rem;font-weight:600;margin-bottom:22px}
.hero h1{color:#fff;margin-bottom:18px}
.hero p{font-size:1.22rem;color:rgba(255,255,255,.9);max-width:600px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;flex-wrap:wrap;margin-top:48px;padding-top:34px;border-top:1px solid rgba(255,255,255,.18)}
.hero-stats .num{font-size:2rem;font-weight:800;color:#fff}
.hero-stats .lbl{font-size:.9rem;color:rgba(255,255,255,.8)}

/* trust strip */
.trust{background:var(--navy);color:#fff;padding:22px 0}
.trust ul{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:14px 40px}
.trust li{display:flex;align-items:center;gap:10px;font-weight:600;font-size:.98rem}
.trust svg{color:var(--gold);flex:none}

/* grid + cards */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.28s;box-shadow:0 4px 14px rgba(16,37,54,.04)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ic{width:58px;height:58px;border-radius:14px;background:var(--bg-soft-2);display:grid;place-items:center;margin-bottom:18px;color:var(--blue);overflow:hidden}
.card .ic img{width:100%;height:100%;object-fit:cover}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:.97rem;margin:0}
.card .more{display:inline-block;margin-top:16px;font-weight:700;color:var(--blue);font-size:.93rem}

/* service card with image */
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.28s;box-shadow:0 4px 14px rgba(16,37,54,.04)}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.svc-card img{width:100%;height:190px;object-fit:cover}
.svc-card .body{padding:26px}
.svc-card h3{margin-bottom:8px}
.svc-card p{color:var(--muted);font-size:.96rem;margin:0}

/* split / about */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.checklist{list-style:none;display:grid;gap:14px;margin:24px 0}
.checklist li{display:flex;gap:12px;align-items:flex-start;font-weight:600;color:var(--ink)}
.checklist svg{color:var(--blue);flex:none;margin-top:3px}

/* price panel */
.price-panel{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;border-radius:24px;padding:clamp(34px,5vw,60px);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.price-panel::after{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(74,164,217,.35),transparent 70%)}
.price-tag{font-size:clamp(3rem,7vw,4.6rem);font-weight:800;color:#fff;line-height:1}
.price-tag span{font-size:1.1rem;color:var(--gold);font-weight:700;vertical-align:super}
.price-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:34px}
.price-grid h4{color:#fff;font-size:1rem;margin-bottom:5px}
.price-grid p{color:rgba(255,255,255,.78);font-size:.92rem;margin:0}
.price-grid .dot{color:var(--gold)}

/* steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.step{position:relative;padding-top:18px}
.step .n{width:54px;height:54px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1.4rem;margin-bottom:18px;box-shadow:0 10px 24px rgba(42,122,181,.32)}
.step h3{margin-bottom:8px}
.step p{color:var(--muted);margin:0}

/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:0 4px 14px rgba(16,37,54,.04)}
.review .stars{color:var(--gold);font-size:1.05rem;letter-spacing:2px;margin-bottom:14px}
.review p{font-size:1.05rem;color:var(--ink);font-style:italic;margin-bottom:18px}
.review .who{font-weight:700;color:var(--navy)}
.review .where{font-size:.88rem;color:var(--muted)}

/* areas */
.area-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s}
.area-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.area-card .cnt{font-size:.82rem;font-weight:700;color:var(--gold);text-transform:uppercase;letter-spacing:.08em}
.area-card h3{margin:8px 0 6px}
.area-card p{color:var(--muted);font-size:.95rem;margin-bottom:16px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--blue-dark),var(--navy));color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.85);max-width:600px;margin:0 auto 30px;font-size:1.1rem}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* form */
.form-wrap{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;color:var(--ink);margin-bottom:7px;font-size:.92rem}
.field input,.field textarea,.field select{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-family:inherit;font-size:1rem;transition:.2s;background:#fbfdff}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(42,122,181,.12)}
.field textarea{min-height:120px;resize:vertical}
.consent{display:flex;gap:10px;font-size:.82rem;color:var(--muted)}
.contact-line{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-line .ic{width:46px;height:46px;border-radius:12px;background:var(--bg-soft-2);display:grid;place-items:center;color:var(--blue);flex:none}
.contact-line h4{margin-bottom:2px}
.contact-line a,.contact-line p{color:var(--body);margin:0}

/* page hero (interior) */
.page-hero{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;padding:clamp(54px,8vw,90px) 0}
.page-hero h1{color:#fff;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.85);max-width:640px;font-size:1.12rem;margin:0}
.crumb{font-size:.86rem;color:rgba(255,255,255,.6);margin-bottom:16px}
.crumb a:hover{color:#fff}

/* footer */
.site-footer{background:var(--navy);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:42px}
.footer-grid h4{color:#fff;font-size:1rem;margin-bottom:18px}
.footer-grid ul{list-style:none;display:grid;gap:10px}
.footer-grid a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;color:#fff;font-weight:800;font-size:1.15rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.86rem}
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* lightbox */
body.lightbox-open{overflow:hidden}
.lightbox{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.92);display:grid;place-items:center;padding:clamp(16px,4vw,48px)}
.lightbox[hidden]{display:none}
.lightbox-inner{max-width:min(92vw,1200px);width:100%}
.lightbox-stage{display:flex;align-items:center;justify-content:center;max-height:85vh}
.lightbox-stage img{max-width:100%;max-height:85vh;width:auto;height:auto;object-fit:contain;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.lightbox-caption{margin:14px 0 0;text-align:center;color:rgba(255,255,255,.85);font-size:.95rem}
.lightbox-caption[hidden]{display:none}
.lightbox-close,.lightbox-prev,.lightbox-next{position:absolute;border:0;background:rgba(255,255,255,.12);color:#fff;font-size:2rem;line-height:1;width:48px;height:48px;border-radius:50%;cursor:pointer;transition:.2s;display:grid;place-items:center;padding:0}
.lightbox-close:hover,.lightbox-prev:hover,.lightbox-next:hover{background:rgba(255,255,255,.22)}
.lightbox-close{top:18px;right:18px;font-size:2.4rem}
.lightbox-prev{left:18px;top:50%;transform:translateY(-50%)}
.lightbox-next{right:18px;top:50%;transform:translateY(-50%)}

@media(max-width:1080px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .split,.form-wrap{grid-template-columns:1fr;gap:36px}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links,.nav-phone{display:none}
  .nav-toggle{display:flex}
  .nav-links.open{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:14px 24px;gap:4px;box-shadow:var(--shadow)}
  .nav-links.open a{padding:12px}
}
@media(max-width:560px){
  .grid-2,.grid-3,.grid-4,.price-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  body{font-size:16px}
}

/* ===== additions: service depth, resources, footer credit ===== */

/* footer credit line */
.footer-credit{border-top:1px solid rgba(255,255,255,.1);margin-top:20px;padding-top:18px;text-align:center;font-size:.8rem;color:rgba(255,255,255,.5)}
.footer-credit a{color:var(--blue-light);font-weight:600;transition:.2s}
.footer-credit a:hover{color:var(--gold);text-decoration:underline}

/* in-depth service blocks */
.svc-detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.svc-detail{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,3vw,34px);box-shadow:0 4px 14px rgba(16,37,54,.04);transition:.28s}
.svc-detail:hover{box-shadow:var(--shadow);border-color:transparent}
.svc-detail .svc-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.svc-detail .svc-head .ic{width:50px;height:50px;border-radius:13px;background:var(--bg-soft-2);display:grid;place-items:center;color:var(--blue);flex:none}
.svc-detail h3{font-size:1.3rem;margin:0}
.svc-detail .svc-detail__lead{color:var(--body);margin-bottom:6px}
.svc-detail h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--blue);margin:20px 0 10px}
.svc-detail .mini-checklist{list-style:none;display:grid;gap:9px;margin:0}
.svc-detail .mini-checklist li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem;color:var(--ink)}
.svc-detail .mini-checklist svg{color:var(--blue);flex:none;margin-top:4px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-block;background:var(--bg-soft-2);color:var(--navy);font-size:.82rem;font-weight:600;padding:6px 13px;border-radius:999px}
.tag--danger{background:#fdeaea;color:var(--red-dark)}
.tag--warn{background:#fbf0db;color:var(--gold-dark)}

/* repair-or-replace columns */
.ror-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.ror-card{border-radius:var(--radius);padding:clamp(26px,3vw,34px);border:1px solid var(--line)}
.ror-card--repair{background:var(--bg-soft-2);border-color:transparent}
.ror-card--replace{background:#fbf0db;border-color:transparent}
.ror-card h3{display:flex;align-items:center;gap:10px;margin-bottom:18px;font-size:1.25rem}
.ror-card h3 svg{flex:none}
.ror-card--repair h3 svg{color:var(--blue)}
.ror-card--replace h3 svg{color:var(--gold-dark)}
.ror-card ul{list-style:none;display:grid;gap:16px}
.ror-card li{display:flex;gap:12px;align-items:flex-start}
.ror-card li svg{flex:none;margin-top:3px}
.ror-card--repair li svg{color:var(--blue)}
.ror-card--replace li svg{color:var(--gold-dark)}
.ror-card li strong{display:block;color:var(--ink);font-size:.98rem}
.ror-card li span{font-size:.9rem;color:var(--muted)}

/* FAQ accordion */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;transition:.2s}
.faq details[open]{box-shadow:var(--shadow);border-color:transparent}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:700;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;line-height:1;color:var(--blue);font-weight:400;transition:.25s;flex:none}
.faq details[open] summary{color:var(--blue)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-a{padding:0 22px 20px;color:var(--muted);font-size:.97rem}

/* city lists on service areas */
.city-list{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}
.city-list li{background:var(--bg-soft-2);color:var(--navy);font-size:.85rem;font-weight:600;padding:6px 12px;border-radius:999px}

@media(max-width:760px){
  .svc-detail-grid,.ror-grid{grid-template-columns:1fr}
}