/* dept5.com/hvac/ v3 (09/25/2026). Red, white and blue per David 09/21/2026: navy is the company, red is the one action,
   white is the page, blue is a link. One type family (Inter Tight), no italics, no capitals, no monospace. */
:root{
  --navy:#0b2545;--navy2:#123a66;--navy3:#1b4470;--line-d:#2a4f7c;
  --ink:#0b2545;--body:#243650;--soft:#3f5270;--muted:#5a6b82;
  --tint:#eef3f9;--line:#d3dce8;--white:#fff;
  --red:#c8102e;--red-hi:#e01a3a;--red-tint:#fbe7ea;--link:#0b5cad;--green:#15804a;
  --f:'Inter Tight',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  --wrap:1200px
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font:18px/1.55 var(--f);color:var(--body);background:#fff;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--link)}
h1,h2,h3{color:var(--ink);letter-spacing:-.03em;margin:0}
h2{font-size:clamp(32px,3.6vw,50px);line-height:1.08;font-weight:700;letter-spacing:-.028em}
h3{font-size:24px;line-height:1.2;font-weight:700;letter-spacing:-.02em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.narrow{max-width:860px}
section{padding:96px 0}
.eyebrow{font-weight:600;font-size:15px;color:var(--red);margin:0 0 12px}
.lede{font-size:20px;color:var(--soft);max-width:680px;margin:18px 0 0}
.src{font-size:.62em;vertical-align:super;margin-left:2px;text-decoration:none;color:var(--link);font-weight:600}
:focus-visible{outline:3px solid var(--link);outline-offset:3px}

.btn{display:inline-flex;align-items:center;justify-content:center;font:700 17px/1 var(--f);padding:18px 26px;border-radius:12px;text-decoration:none;border:0;cursor:pointer;transition:background .15s,transform .15s,box-shadow .15s;letter-spacing:-.01em}
.btn:hover{transform:translateY(-1px)}
.btn-red{background:var(--red);color:#fff;box-shadow:0 12px 28px -12px rgba(200,16,46,.65)}
.btn-red:hover{background:var(--red-hi)}
.btn-ghost{color:#fff;box-shadow:0 0 0 1.5px rgba(255,255,255,.55) inset}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-line{color:var(--navy);box-shadow:0 0 0 1.5px var(--navy) inset;background:#fff}
.btn-sm{padding:12px 18px;font-size:15px;border-radius:10px}

/* header */
.top{background:var(--navy);border-bottom:1px solid var(--navy3);position:sticky;top:0;z-index:20}
.top .wrap{display:flex;align-items:center;gap:22px;height:70px}
.logo{font:800 26px/1 var(--f);color:#fff;text-decoration:none;letter-spacing:-.04em}
.cred{margin:0;font-size:13.5px;line-height:1.3;color:#a9bbd2;max-width:260px;padding-left:18px;border-left:1px solid var(--line-d)}
.nav{margin-left:auto;display:flex;gap:26px}
.nav a{color:#c7d5e6;text-decoration:none;font-size:15.5px;font-weight:500}
.nav a:hover{color:#fff}

/* hero */
.hero{background:var(--navy);color:#fff;padding:64px 0 80px;overflow:hidden;position:relative}
.hero:before{content:"";position:absolute;right:-240px;top:-200px;width:760px;height:760px;border-radius:50%;background:radial-gradient(circle,rgba(27,68,112,.9),rgba(11,37,69,0) 70%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center;position:relative}
.chip{display:inline-block;font-weight:600;font-size:14.5px;color:#dbe6f3;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:7px 14px;margin:0 0 22px}
.hero h1{color:#fff;font-size:clamp(40px,4.6vw,64px);line-height:1.05;letter-spacing:-.032em;font-weight:800}
.hero-sub{font-size:21px;line-height:1.5;color:#cbd8ea;margin:22px 0 0;max-width:600px}
.hero-list{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:12px}
.hero-list li{position:relative;padding-left:34px;font-size:18.5px;color:#fff;font-weight:500}
.hero-list li:before{content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;background:var(--red)}
.hero-list li:after{content:"";position:absolute;left:7px;top:8px;width:5px;height:9px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.hero-price{margin:18px 0 0;font-size:15.5px;color:#a9bbd2}
.hero-visual{position:relative;height:620px}
.phone{position:absolute;right:70px;top:0;width:300px;border-radius:44px;padding:10px;background:#050f1d;box-shadow:0 60px 90px -40px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.08)}
.phone img{border-radius:34px;width:100%;height:600px;object-fit:cover;object-position:top}
.float{position:absolute;background:#fff;color:var(--body);border-radius:16px;box-shadow:0 30px 60px -24px rgba(0,0,0,.6);padding:16px 18px}
.float p{margin:0}
.float.call{left:-10px;top:110px;width:330px}
.float.booked{right:0;bottom:30px;width:260px}
.fl-top{font-size:12.5px;font-weight:600;color:var(--muted);display:flex;gap:7px;align-items:center;margin-bottom:10px!important}
.fl-top.green{color:var(--green);font-size:13px}
.fl-big{font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.02em}
.fl-sub{font-size:13.5px;color:var(--muted);margin-top:3px!important}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);flex:none;box-shadow:0 0 0 3px rgba(21,128,74,.18)}
.bub{font-size:14.5px;line-height:1.4;padding:10px 13px;border-radius:14px;max-width:88%;margin-top:8px!important}
.bub.them{background:var(--tint);color:var(--ink);border-bottom-left-radius:4px}
.bub.ai{background:var(--navy);color:#fff;margin-left:auto!important;border-bottom-right-radius:4px}

/* cost */
.cost{background:#fff}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:44px}
.stat{border:1px solid var(--line);border-radius:18px;padding:30px 28px;border-top:5px solid var(--red)}
.stat b{display:block;font-size:64px;line-height:1;font-weight:800;color:var(--red);letter-spacing:-.04em}
.stat p{margin:14px 0 0;font-size:17.5px;color:var(--body)}
.loss{margin-top:18px;background:var(--navy);color:#fff;border-radius:18px;padding:26px 30px;display:flex;align-items:center;gap:34px;flex-wrap:wrap}
.loss-q label{display:block;font-size:14.5px;color:#a9bbd2;margin-bottom:8px;font-weight:500}
.stepper{display:inline-flex;align-items:center;background:var(--navy2);border-radius:12px;overflow:hidden}
.stepper button{width:46px;height:46px;border:0;background:transparent;color:#fff;font-size:24px;cursor:pointer}
.stepper button:hover{background:var(--navy3)}
.stepper output{min-width:44px;text-align:center;font-size:24px;font-weight:700}
.loss-a{margin:0;font-size:21px;color:#dbe6f3;flex:1;min-width:280px}
.loss-a b{font-size:40px;color:#fff;letter-spacing:-.03em;margin-right:6px}

/* what */
.what{background:var(--tint)}
.feats{display:grid;gap:22px;margin-top:44px}
.feat{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:#fff;border-radius:22px;padding:44px;border:1px solid var(--line)}
.feat.flip .feat-copy{order:2}
.feat-copy h3{font-size:34px;letter-spacing:-.035em;margin:10px 0 14px}
.feat-copy p{margin:0;font-size:18.5px;color:var(--body)}
.tag{display:inline-block;font-size:13.5px!important;font-weight:600;color:var(--navy)!important;background:var(--tint);border-radius:99px;padding:5px 12px}
.feat-visual.shot{background:var(--tint);border-radius:16px;padding:24px;display:flex;justify-content:center;max-height:420px;overflow:hidden}
.feat-visual.shot img{border-radius:12px;box-shadow:0 20px 40px -24px rgba(11,37,69,.45);object-fit:cover;object-position:top;max-height:372px;width:auto}
.feat-visual.chat{background:var(--tint);border-radius:16px;padding:24px;display:flex;flex-direction:column}
.feat-visual.chat p{margin:0}
.feat-visual.chat .bub.them{background:#fff}

/* demos */
.demo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.demo{display:flex;flex-direction:column;text-decoration:none;color:inherit;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff;transition:box-shadow .2s,transform .2s}
.demo:hover{box-shadow:0 30px 60px -30px rgba(11,37,69,.45);transform:translateY(-3px)}
.demo-shots{position:relative;background:var(--tint);padding:18px 18px 0;height:250px;overflow:hidden}
.d-desk{border-radius:10px 10px 0 0;box-shadow:0 10px 30px -14px rgba(11,37,69,.5)}
.d-mob{position:absolute;right:14px;bottom:-60px;width:96px;border-radius:14px;border:4px solid #050f1d;box-shadow:0 14px 30px -10px rgba(0,0,0,.5)}
.demo-copy{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.demo-copy h3{font-size:22px}
.where{font-size:14.5px;color:var(--muted);margin:4px 0 10px}
.demo-copy p{margin:0 0 18px;font-size:16.5px}
.go{margin-top:auto;font-weight:700;color:var(--red);font-size:16.5px}
.go:after{content:" \2197"}
.note{font-size:14.5px;color:var(--muted);margin:18px 0 0}

/* works */
.works{background:var(--navy);color:#fff}
.works h2{color:#fff}
.works .eyebrow{color:#ff8a9a}
.works .lede{color:#cbd8ea}
.works-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.logos{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px}
.logos li{background:var(--navy2);border:1px solid var(--line-d);border-radius:12px;padding:12px 16px;font-weight:600;font-size:16.5px;color:#fff}
.twice{margin:22px 0 0;font-size:17px;color:#cbd8ea;border-left:4px solid var(--red);padding-left:16px}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:44px;align-items:stretch}
.plan{border:1.5px solid var(--line);border-radius:22px;padding:32px 28px;display:flex;flex-direction:column;position:relative;background:#fff}
.plan.rec{border:2px solid var(--red);box-shadow:0 40px 80px -50px rgba(200,16,46,.55)}
.rec-tag{position:absolute;top:-14px;left:26px;margin:0;background:var(--red);color:#fff;font-size:13.5px;font-weight:700;border-radius:99px;padding:5px 13px}
.plan h3{font-size:26px}
.pitch{margin:8px 0 22px;color:var(--soft);font-size:17px}
.price{margin:0;font-size:18px;color:var(--soft)}
.price b{font-size:54px;color:var(--ink);letter-spacing:-.04em;font-weight:800;line-height:1}
.setup{margin:6px 0 22px;font-weight:600;color:var(--ink)}
.plan ul{list-style:none;padding:0;margin:0 0 28px;display:grid;gap:11px;border-top:1px solid var(--line);padding-top:22px}
.plan li{position:relative;padding-left:28px;font-size:16px}
.plan li:before{content:"";position:absolute;left:4px;top:5px;width:6px;height:11px;border:solid var(--red);border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}
.plan .btn{margin-top:auto}
.payback{margin:30px 0 0;font-size:18px;background:var(--tint);border-radius:16px;padding:22px 26px}
.fine{font-size:14.5px;color:var(--muted);margin:14px 0 0}

/* why */
.why{background:var(--tint)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.why-grid div{background:#fff;border-radius:18px;padding:30px;border:1px solid var(--line)}
.why-grid h3{font-size:21px}
.why-grid p{margin:10px 0 0;font-size:16.5px}

/* faq */
.faq details{border-bottom:1px solid var(--line)}
.faq h2{margin-bottom:22px}
.faq summary{list-style:none;cursor:pointer;padding:22px 0;font-size:20px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;gap:20px;letter-spacing:-.015em}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--red);font-size:28px;line-height:.8;font-weight:500}
.faq details[open] summary:after{content:"\2212"}
.faq details p{margin:0 0 24px;font-size:17.5px}

/* book */
.book{background:var(--navy);color:#fff}
.book h2{color:#fff}
.book .lede{color:#cbd8ea}
.book-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.book-list{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:10px}
.book-list li{position:relative;padding-left:30px;font-weight:500}
.book-list li:before{content:"";position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;background:var(--red)}
.alt{margin:26px 0 0;color:#cbd8ea}
.alt a{color:#fff;font-weight:700}
.ask{margin-top:18px;border-top:1px solid var(--line-d);padding-top:14px}
.ask summary{cursor:pointer;color:#fff;font-weight:600;list-style:none}
.ask summary::-webkit-details-marker{display:none}
.ask summary:after{content:" +";color:#ff8a9a}
.ask[open] summary:after{content:" \2212"}
.ask-form{display:grid;gap:12px;margin-top:14px}
.ask-form label{display:grid;gap:6px;font-size:14.5px;color:#cbd8ea;font-weight:500}
.ask-form input,.ask-form textarea{font:500 16px var(--f);border-radius:10px;border:1px solid var(--line-d);background:var(--navy2);color:#fff;padding:12px 13px}
.ask-form .btn{justify-self:start}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.ask-msg{margin:0;font-size:15px;color:#cbd8ea}
.cal-card{background:#fff;border-radius:20px;padding:18px 18px 12px;color:var(--body)}
.cal-title{margin:6px 8px 4px;font-weight:700;color:var(--ink);font-size:18px}
.cal{overflow:hidden;min-height:560px;position:relative}
.cal-frame{width:100%;height:700px;border:0;display:block}
.cal-fallback{font-size:14px;color:var(--muted);margin:8px 8px 4px}

/* sources + footer */
.sources{padding:40px 0}
.sources summary{cursor:pointer;font-weight:600;color:var(--soft)}
.sources ol{font-size:15px;color:var(--soft);padding-left:20px}
.sources li{margin:8px 0}
.foot{border-top:1px solid var(--line);padding:30px 0 40px;font-size:14px;color:var(--muted)}
.foot p{margin:4px 0}
.foot a{color:var(--soft)}

@media (max-width:1100px){
  .cred{display:none}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{height:560px;max-width:560px;margin:0 auto;width:100%}
  .phone{right:auto;left:50%;transform:translateX(-50%);width:270px}
  .phone img{height:540px}
  .float.call{left:0;top:90px}
  .float.booked{right:0}
}
@media (min-width:1041px){
  .plans .pitch{min-height:79px}
}
@media (max-width:1040px){
  .plans{grid-template-columns:1fr;max-width:640px}
}
@media (max-width:900px){
  .nav{display:none}
  .top .btn-sm{margin-left:auto}
  .stats,.demo-grid,.why-grid,.plans{grid-template-columns:1fr}
  .feat{grid-template-columns:1fr;gap:26px;padding:28px}
  .feat.flip .feat-copy{order:0}
  .works-grid,.book-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:600px){
  body{font-size:17px}
  .wrap{padding:0 18px}
  section{padding:64px 0}
  .top{position:static}
  .top .wrap{height:62px}
  .logo{font-size:23px}
  .top .btn-sm{padding:11px 13px;font-size:14px}
  .hero{padding:36px 0 50px}
  .hero h1{font-size:36px}
  .hero-sub{font-size:18px}
  .hero-list li{font-size:16.5px}
  .hero-ctas .btn{flex:1 1 100%}
  .hero-visual{height:470px}
  .phone{width:220px;border-radius:34px;padding:8px}
  .phone img{height:440px;border-radius:27px}
  .float.call{width:250px;top:60px;padding:12px 13px}
  .float.booked{width:200px;bottom:10px;padding:12px 14px}
  .bub{font-size:13px}
  .fl-big{font-size:17px}
  .lede{font-size:18px}
  .stat b{font-size:52px}
  .loss{padding:22px;gap:18px}
  .loss-a{font-size:18px}.loss-a b{font-size:32px}
  .feat-copy h3{font-size:28px}
  .feat-visual.shot{padding:14px;max-height:340px}
  .feat-visual.shot img{max-height:312px}
  .plan{padding:28px 22px}
  .price b{font-size:50px}
  .demo-shots{height:210px}
  .faq summary{font-size:18px}
  .cal-card{padding:10px 6px 8px}
}