/* HVAC On Sale — store stylesheet
   Tokens are derived from the logo: navy wordmark, slate "on", sale red. */
:root{
  --navy:#053263; --navy-deep:#04264c; --navy-ink:#061c3a;
  --red:#c91b1b; --red-deep:#a31414;
  --slate:#585858; --slate-deep:#3f3f3f;
  --ice:#eef3f9; --ice-deep:#dfe7f2; --line:#d6dde6;
  --ink:#141a24; --muted:#525b68; --white:#ffffff;
  --ok:#1b7f4b;
  --font:"Archivo","Helvetica Neue",Arial,sans-serif;
  --container:1220px; --radius:6px; --radius-lg:12px;
  --shadow:0 12px 32px rgba(15,42,95,.14);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.55;color:var(--ink);background:var(--white)}
img,svg{display:block;max-width:100%}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--red);outline-offset:2px}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.15;font-weight:800;letter-spacing:-.01em;color:var(--navy-ink)}
h1{font-size:clamp(2rem,4.2vw,3.4rem);letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* ---------- buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:48px;padding:.7rem 1.4rem;border-radius:var(--radius);font-weight:700;font-size:1rem;border:2px solid transparent;transition:background .15s,color .15s,border-color .15s}
.btn:hover{text-decoration:none}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-deep)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-deep)}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-white{background:#fff;color:var(--navy)}
.btn-white:hover{background:var(--ice)}
.btn-sm{min-height:40px;padding:.5rem 1rem;font-size:.92rem}

/* ---------- announcement bar */
.announce{background:var(--navy-ink);color:#fff;font-size:.88rem}
.announce-inner{display:flex;align-items:center;justify-content:center;gap:1.2rem;min-height:38px;text-align:center;flex-wrap:wrap}
.announce a{color:#fff;font-weight:700;text-decoration:underline;text-underline-offset:3px}

/* ---------- header */
.site-header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}
.header-main{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:1.2rem;min-height:82px}
.header-left{display:flex;align-items:center;gap:.6rem}
.brand img{width:auto;height:40px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:0;background:transparent;color:var(--navy-ink)}
.icon-btn svg{width:24px;height:24px}
.icon-btn:hover{background:var(--ice)}
.hamburger{display:none}
.header-search{position:relative;display:flex;align-items:center;max-width:640px;width:100%;justify-self:center}
.search-field{width:100%;height:46px;padding:0 3rem 0 1rem;border:2px solid var(--ice-deep);border-radius:999px;font:inherit;font-size:.98rem;background:var(--ice);color:var(--ink)}
.search-field::placeholder{color:var(--slate)}
.search-field:focus{outline:0;border-color:var(--navy);background:#fff}
.search-btn{position:absolute;right:4px;top:4px;width:38px;height:38px;border:0;border-radius:50%;background:var(--navy);color:#fff;display:inline-flex;align-items:center;justify-content:center}
.search-btn svg{width:18px;height:18px}
.search-results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:.4rem;display:none;z-index:50}
.search-results.open{display:block}
.search-results a{display:block;padding:.6rem .8rem;border-radius:var(--radius);color:var(--ink)}
.search-results a:hover{background:var(--ice);text-decoration:none}
.search-results a small{display:block;color:var(--muted)}
.search-results .none{padding:.6rem .8rem;color:var(--muted)}
.header-actions{display:flex;align-items:center;gap:.25rem}
.help-link{display:flex;align-items:center;gap:.6rem;padding:.3rem .8rem;border-radius:var(--radius);color:var(--navy-ink);line-height:1.15}
.help-link:hover{background:var(--ice);text-decoration:none}
.help-link svg{width:22px;height:22px;color:var(--navy)}
.help-link small{display:block;font-size:.72rem;color:var(--muted)}
.help-link b{font-size:.92rem}
.mobile-search{display:none}
.cart-btn{position:relative}
.cart-count{position:absolute;top:2px;right:0;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--red);color:#fff;font-size:.7rem;font-weight:700;line-height:18px;text-align:center}

/* category nav */
.primary-nav{border-top:1px solid var(--line);background:#fff}
.primary-nav .container{display:flex;align-items:stretch;gap:.1rem;overflow-x:auto;scrollbar-width:none}
.primary-nav .container::-webkit-scrollbar{display:none}
.nav-item{position:relative;flex:0 0 auto}
.nav-item>a{display:flex;align-items:center;gap:.3rem;padding:.8rem .9rem;font-weight:600;font-size:.95rem;color:var(--navy-ink);white-space:nowrap;border-bottom:3px solid transparent}
.nav-item>a:hover{text-decoration:none;border-bottom-color:var(--navy)}
.nav-item.sale>a{color:var(--red)}
.nav-item.sale>a:hover{border-bottom-color:var(--red)}
.nav-item>a svg{width:14px;height:14px}
.nav-panel{position:absolute;top:100%;left:0;min-width:280px;background:#fff;border:1px solid var(--line);border-radius:0 0 var(--radius-lg) var(--radius-lg);box-shadow:var(--shadow);padding:.6rem;display:none;z-index:45}
.nav-item:hover .nav-panel,.nav-item:focus-within .nav-panel,.nav-item.open .nav-panel{display:block}
.nav-panel ul{list-style:none;margin:0;padding:0}
.nav-panel a{display:block;padding:.55rem .7rem;border-radius:var(--radius);color:var(--ink)}
.nav-panel a:hover{background:var(--ice);text-decoration:none}
.nav-panel a small{display:block;color:var(--muted);font-size:.82rem}
.nav-go{font-weight:700;color:var(--navy)!important;border-bottom:1px solid var(--line);border-radius:0!important;margin-bottom:.3rem}

/* mobile menu + drawers */
.backdrop{position:fixed;inset:0;background:rgba(11,29,63,.5);opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;z-index:60}
.backdrop.show{opacity:1;visibility:visible}
.mobile-menu,.cart-drawer{position:fixed;top:0;bottom:0;width:min(400px,92vw);background:#fff;z-index:70;display:flex;flex-direction:column;transition:transform .25s;box-shadow:var(--shadow)}
.mobile-menu{left:0;transform:translateX(-102%)}
.cart-drawer{right:0;transform:translateX(102%)}
.mobile-menu.open,.cart-drawer.open{transform:none}
.mm-head,.cart-head{display:flex;align-items:center;justify-content:space-between;padding:.8rem 1rem;border-bottom:1px solid var(--line)}
.mm-search{padding:.8rem 1rem}
.mm-body{overflow-y:auto;padding:.4rem 1rem 1.5rem}
.mm-group{border-bottom:1px solid var(--line)}
.mm-row{display:flex;width:100%;align-items:center;justify-content:space-between;padding:.9rem 0;background:none;border:0;font-weight:700;font-size:1.02rem;color:var(--navy-ink);text-align:left}
.mm-row svg{width:16px;height:16px;transition:transform .2s}
.mm-row[aria-expanded="true"] svg{transform:rotate(180deg)}
.mm-row.sale{color:var(--red)}
.mm-sub{display:none;padding:0 0 .8rem .6rem}
.mm-sub a{display:block;padding:.45rem 0;color:var(--ink)}
.mm-row[aria-expanded="true"]+.mm-sub{display:block}
.mm-meta{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--line);display:grid;gap:.6rem;font-size:.95rem}
.mm-meta a{display:flex;align-items:center;gap:.6rem;color:var(--navy-ink)}
.mm-meta svg{width:20px;height:20px;color:var(--navy)}
.cart-body{flex:1;padding:2rem 1.4rem;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;color:var(--muted)}
.cart-body svg{width:56px;height:56px;color:var(--ice-deep)}
.cart-body h4{font-size:1.2rem}
.cart-foot{padding:1rem 1.4rem 1.4rem;display:grid;gap:.6rem;border-top:1px solid var(--line)}

/* ---------- hero */
.hero{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:2.5rem;align-items:center;padding:3.5rem 20px}
.hero h1{color:#fff;max-width:14ch}
.hero p{font-size:1.15rem;max-width:46ch;color:#dbe4f3}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.6rem}
.hero-media{position:relative}
.hero-media img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);box-shadow:0 24px 48px rgba(0,0,0,.35)}
.hero-tag{position:absolute;left:-10px;bottom:22px;background:var(--red);color:#fff;font-weight:800;padding:.55rem .9rem;border-radius:var(--radius);box-shadow:0 8px 20px rgba(0,0,0,.25);font-size:.95rem}
.hero-note{margin-top:1.4rem;display:flex;flex-wrap:wrap;gap:.6rem 1.6rem;font-size:.9rem;color:#c7d3e8}
.hero-note span{display:inline-flex;align-items:center;gap:.4rem}
.hero-note svg{width:16px;height:16px;color:#fff}

/* ---------- sections */
.section{padding:3.5rem 0}
.section.wash{background:var(--ice)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:1rem;margin-bottom:1.6rem;flex-wrap:wrap}
.section-head p{margin:0;color:var(--muted);max-width:60ch}
.section-head .btn{flex:0 0 auto}

/* category tiles */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.cat{display:flex;gap:1rem;align-items:flex-start;padding:1.3rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);color:var(--ink);transition:border-color .15s,box-shadow .15s}
.cat:hover{text-decoration:none;border-color:var(--navy);box-shadow:var(--shadow)}
.cat-icon{flex:0 0 56px;width:56px;height:56px;border-radius:var(--radius);background:var(--ice);color:var(--navy);display:grid;place-items:center}
.cat-icon svg{width:32px;height:32px}
.cat h3{margin-bottom:.25rem}
.cat p{margin:0;color:var(--muted);font-size:.93rem}
.cat .cat-link{display:inline-block;margin-top:.5rem;font-weight:700;color:var(--red);font-size:.92rem}

/* trust row */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.trust div{display:block}
.trust svg{width:30px;height:30px;color:var(--red);margin-bottom:.7rem}
.trust h3{font-size:1.02rem;margin-bottom:.2rem}
.trust p{margin:0;color:var(--muted);font-size:.93rem}

/* ordering steps (a real sequence, so it is numbered) */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;counter-reset:step}
.steps li{counter-increment:step;padding:1.4rem;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--line)}
.steps li::before{content:counter(step);display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;font-weight:800;margin-bottom:.8rem}
.steps h3{margin-bottom:.3rem}
.steps p{margin:0;color:var(--muted);font-size:.95rem}

/* deals band */
.deals{background:linear-gradient(105deg,var(--red) 0%,var(--red-deep) 100%);color:#fff;border-radius:var(--radius-lg);padding:2.2rem;display:grid;grid-template-columns:1.2fr 1fr;gap:2rem;align-items:center}
.deals h2{color:#fff}
.deals p{color:#ffe1e2;margin:0}
.deals form{display:flex;gap:.6rem;flex-wrap:wrap}
.deals input[type=email]{flex:1 1 220px;height:48px;padding:0 1rem;border:0;border-radius:var(--radius);font:inherit;font-size:1rem}
.form-ok{color:#fff;font-weight:600}
.form-err{color:#ffe1e2;font-weight:600}

/* faq */
.faq{max-width:820px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:1rem 2.2rem 1rem 0;font-weight:700;font-size:1.05rem;position:relative;color:var(--navy-ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:.4rem;top:1.25rem;width:10px;height:10px;border-right:2px solid var(--navy);border-bottom:2px solid var(--navy);transform:rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(-135deg);top:1.5rem}
.faq details p{color:var(--muted);padding:0 0 1.1rem;max-width:70ch}

/* ---------- page (about, contact, policies) */
.page-head{background:var(--ice);padding:2.6rem 0 2.2rem}
.page-head h1{max-width:20ch}
.page-head p{margin:.6rem 0 0;color:var(--muted);max-width:60ch;font-size:1.08rem}
.crumbs{font-size:.86rem;color:var(--muted);margin-bottom:.9rem}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 .4rem}
.prose{max-width:760px;padding:2.6rem 0 3.5rem}
.prose h2{font-size:1.45rem;margin:2rem 0 .7rem}
.prose h3{margin:1.4rem 0 .4rem}
.prose p,.prose li{color:#2c3440;font-size:1.02rem}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li{margin-bottom:.4rem}
.prose .dateline{color:var(--muted);font-size:.92rem}
.prose table{border-collapse:collapse;width:100%;font-size:.95rem;margin:1rem 0}
.prose th,.prose td{text-align:left;padding:.55rem .6rem;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{background:var(--ice)}
.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;padding:2.6rem 0 3.5rem;align-items:start}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:1.6rem}
.card h2{font-size:1.3rem;margin-bottom:.8rem}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:.9rem}
.contact-list li{display:flex;gap:.8rem;align-items:flex-start}
.contact-list svg{flex:0 0 22px;width:22px;height:22px;color:var(--navy);margin-top:2px}
.contact-list b{display:block}
.contact-list span{color:var(--muted);font-size:.93rem}

/* forms */
.form{display:grid;gap:1rem}
.form label{display:grid;gap:.35rem;font-weight:600;font-size:.95rem}
.form input,.form select,.form textarea{width:100%;font:inherit;font-size:1rem;padding:.7rem .85rem;border:2px solid var(--ice-deep);border-radius:var(--radius);background:#fff;color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--navy)}
.form textarea{min-height:150px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form .hint{color:var(--muted);font-weight:400;font-size:.86rem}
.form-status{margin:0;font-weight:600}
.form-status.ok{color:var(--ok)}
.form-status.err{color:var(--red)}

/* ---------- footer */
.footer{background:var(--ice);border-top:1px solid var(--line);margin-top:2rem;font-size:.95rem}
.footer-top{display:grid;grid-template-columns:1.3fr 2.4fr;gap:3rem;padding:3rem 0 2rem}
.footer-about p{color:var(--muted);margin:.9rem 0 .8rem;max-width:36ch}
.footer-about .brand img{height:36px}
.footer-contact{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.footer-contact li{display:flex;align-items:center;gap:.6rem;color:var(--ink)}
.footer-contact svg{width:18px;height:18px;color:var(--navy)}
.footer-cols{display:grid;grid-template-columns:1fr 1fr 1fr 1.4fr;gap:1.6rem}
.footer-col summary{list-style:none;font-weight:800;color:var(--navy-ink);margin-bottom:.6rem;display:flex;justify-content:space-between;align-items:center;cursor:default}
.footer-col summary::-webkit-details-marker{display:none}
.footer-col summary svg{display:none;width:16px;height:16px}
.footer-links{display:grid;gap:.4rem}
.footer-links a{color:var(--ink)}
.footer-news h4{font-size:1rem;margin-bottom:.4rem;color:var(--navy-ink)}
.footer-news p{color:var(--muted);font-size:.9rem}
.news-form{display:grid;gap:.5rem}
.news-form input[type=email]{height:44px;padding:0 .9rem;border:2px solid var(--ice-deep);border-radius:var(--radius);font:inherit;background:#fff}
.news-form input:focus{outline:0;border-color:var(--navy)}
.news-ok{color:var(--ok);font-weight:600}
.news-err{color:var(--red);font-weight:600}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:1.2rem 0 1.6rem;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}
.foot-bottom p{margin:0}
.foot-bottom nav{display:flex;flex-wrap:wrap;gap:.3rem 1.1rem}
.foot-bottom nav a{color:var(--muted)}
.pay-icons{display:flex;gap:.35rem;flex-wrap:wrap}
.pay-icons svg{width:38px;height:24px}

/* ---------- responsive */
@media (max-width:1024px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .trust,.steps{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr;gap:2rem}
  .footer-cols{grid-template-columns:1fr 1fr}
  .help-link{display:none}
}
@media (max-width:820px){
  .hamburger{display:inline-flex}
  .header-main{grid-template-columns:auto 1fr auto;min-height:64px;gap:.5rem}
  .header-main>.header-search{display:none}
  .mobile-search{display:inline-flex}
  .brand img{height:26px}
  .primary-nav{display:none}
  .hero-inner{grid-template-columns:1fr;padding:2.4rem 20px;gap:1.6rem}
  .hero-media{order:-1}
  .hero-media img{aspect-ratio:16/10}
  .hero-tag{left:12px;bottom:12px}
  .two-col{grid-template-columns:1fr;gap:2rem}
  .deals{grid-template-columns:1fr;padding:1.6rem}
  .section{padding:2.6rem 0}
}
@media (max-width:560px){
  .cat-grid,.trust,.steps{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .footer-col summary{cursor:pointer}
  .footer-col summary svg{display:block}
  .footer-col:not([open]) .footer-links{display:none}
  .foot-bottom{justify-content:center;text-align:center}
}

/* ---------- articles */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.article-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.article-card:hover{text-decoration:none;border-color:var(--navy);box-shadow:var(--shadow)}
.article-card img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.article-card div{padding:1.1rem 1.2rem 1.3rem}
.article-card h3{margin-bottom:.35rem}
.article-card p{margin:0;color:var(--muted);font-size:.93rem}
.article-card time{display:block;margin-top:.6rem;color:var(--muted);font-size:.82rem}
.empty{max-width:640px;padding:2rem;background:var(--ice);border-radius:var(--radius-lg)}
.empty p{margin:0 0 .8rem;color:var(--muted)}
.article-hero{margin:0 0 1.6rem}
.article-hero img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-lg)}
.article-hero figcaption{color:var(--muted);font-size:.85rem;margin-top:.4rem}
.byline{display:flex;gap:.6rem;flex-wrap:wrap;color:var(--muted);font-size:.92rem;margin:.6rem 0 0}
@media (max-width:1024px){.article-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.article-grid{grid-template-columns:1fr}}
.quick-answer{background:var(--ice);border-left:5px solid var(--red);border-radius:0 var(--radius-lg) var(--radius-lg) 0;padding:1.1rem 1.3rem;margin:0 0 1.2rem}
.quick-answer p{margin:0;font-size:1.08rem;color:var(--ink)}