/* ============================================================
   HVACServiceLine.com — design tokens
   Palette: glacier blue (cooling) + ember amber (heating)
   Display: Space Grotesk / Body: Inter / Utility: IBM Plex Mono
   Signature motifs: vent-grille slat lines, temperature-gauge dial
   ============================================================ */
:root{
  --ink:#152029;
  --ink-soft:#3B4954;
  --slate:#5C6C76;
  --paper:#F6F8F8;
  --paper-raised:#FFFFFF;
  --glacier-950:#0E2B3D;
  --glacier-900:#123B52;
  --glacier-700:#1C5476;
  --glacier-500:#2C7BA6;
  --glacier-200:#CFE6EF;
  --glacier-100:#E5F1F5;
  --ember-700:#B8481E;
  --ember-600:#D2571F;
  --ember-500:#E1682B;
  --ember-200:#F6D3B8;
  --ember-100:#FBE7D5;
  --line:#DCE4E7;
  --line-soft:#EAEFF0;
  --ok:#1E7A4C;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-card:0 1px 2px rgba(14,43,61,.06), 0 8px 24px -12px rgba(14,43,61,.18);
  --shadow-pop:0 12px 32px -10px rgba(14,43,61,.28);
  --container:1180px;
  --font-display:'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--glacier-950);line-height:1.15;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,4.5vw,3.4rem);letter-spacing:-.02em}
h2{font-size:clamp(1.7rem,3vw,2.4rem);letter-spacing:-.01em}
h3{font-size:1.25rem}
p{margin:0 0 1em;color:var(--ink-soft)}
ul,ol{color:var(--ink-soft)}
.mono{font-family:var(--font-mono)}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-tight{padding:44px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ember-600);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--ember-500);display:inline-block}
.lede{font-size:1.15rem;color:var(--ink-soft);max-width:62ch}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--ember-500);outline-offset:2px;border-radius:4px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-body);font-weight:600;font-size:.98rem;
  padding:14px 26px;border-radius:999px;border:2px solid transparent;
  cursor:pointer;text-decoration:none;transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn-ember{background:var(--ember-500);color:#fff;box-shadow:0 6px 18px -6px rgba(225,104,43,.55)}
.btn-ember:hover{background:var(--ember-600)}
.btn-glacier{background:var(--glacier-900);color:#fff}
.btn-glacier:hover{background:var(--glacier-950)}
.btn-outline{background:transparent;border-color:var(--glacier-200);color:var(--glacier-950)}
.btn-outline:hover{border-color:var(--glacier-500);background:var(--glacier-100)}
.btn-ghost{background:transparent;color:var(--glacier-950);border-color:transparent;padding:10px 6px}
.btn-block{width:100%}
.btn svg{width:18px;height:18px;flex:none}

/* ---------- Vent-grille watermark (signature motif #1) ---------- */
.vent-watermark{
  position:absolute;inset:0;pointer-events:none;overflow:hidden;
  background-image:repeating-linear-gradient(100deg, rgba(255,255,255,.05) 0 2px, transparent 2px 26px);
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 85%);
}
.vent-watermark--light{
  background-image:repeating-linear-gradient(100deg, rgba(18,59,82,.05) 0 2px, transparent 2px 26px);
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,248,248,.98); /* solid/near-opaque, NOT backdrop-filter — avoids breaking the fixed mobile drawer */
  border-bottom:1px solid var(--line);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--font-display);font-weight:700;font-size:1.15rem;color:var(--glacier-950)}
.brand-mark{width:36px;height:36px;flex:none}
.brand small{display:block;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.08em;color:var(--slate);font-weight:500;text-transform:uppercase}
.primary-nav{display:none}
.primary-nav ul{list-style:none;display:flex;gap:26px;margin:0;padding:0;align-items:center}
.primary-nav a{text-decoration:none;font-weight:600;font-size:.92rem;color:var(--ink-soft)}
.primary-nav a:hover{color:var(--glacier-900)}
.dropdown{position:relative}
.dropdown-panel{
  display:none;position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-pop);
  min-width:280px;padding:10px;
}
.dropdown:hover .dropdown-panel,.dropdown:focus-within .dropdown-panel{display:block}
.dropdown-panel a{display:block;padding:9px 12px;border-radius:8px;font-size:.88rem;font-weight:500}
.dropdown-panel a:hover{background:var(--glacier-100)}
.header-cta{display:flex;align-items:center;gap:14px}
.header-phone{display:none;align-items:center;gap:8px;font-family:var(--font-mono);font-weight:600;color:var(--glacier-950);text-decoration:none;font-size:.95rem}
.header-phone svg{width:18px;height:18px;color:var(--ember-500)}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  background:var(--glacier-950);border:none;border-radius:10px;color:#fff;cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px}
@media (min-width:960px){
  .primary-nav{display:block}
  .header-phone{display:inline-flex}
  .nav-toggle{display:none}
}

/* Mobile nav drawer — deliberately placed OUTSIDE the header element in the
   DOM (see markup) so header's stacking/containing context can never clip
   or shrink this fixed-position panel. */
.mobile-drawer{
  position:fixed;inset:0;z-index:100;
  visibility:hidden;
}
.mobile-drawer[data-open="true"]{visibility:visible}
.mobile-drawer-backdrop{
  position:absolute;inset:0;background:rgba(14,43,61,.55);opacity:0;transition:opacity .2s ease;
}
.mobile-drawer[data-open="true"] .mobile-drawer-backdrop{opacity:1}
.mobile-drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(86vw,360px);
  background:#fff;box-shadow:var(--shadow-pop);
  transform:translateX(100%);transition:transform .25s ease;
  display:flex;flex-direction:column;padding:22px;overflow-y:auto;
}
.mobile-drawer[data-open="true"] .mobile-drawer-panel{transform:translateX(0)}
.mobile-drawer-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.mobile-drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}
.mobile-drawer-close svg{width:20px;height:20px}
.mobile-drawer nav{display:flex;flex-direction:column;gap:2px}
.mobile-drawer nav a{padding:13px 8px;border-bottom:1px solid var(--line-soft);text-decoration:none;font-weight:600;color:var(--ink)}
.mobile-drawer .drawer-group-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--slate);padding:16px 8px 4px}
.mobile-drawer .btn{margin-top:18px}
@media (min-width:960px){ .mobile-drawer{display:none} }

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--glacier-950),var(--glacier-700) 78%);color:#fff;padding:76px 0 92px}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:44px;align-items:center}
.hero h1{color:#fff}
.hero .lede{color:rgba(255,255,255,.82)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-badges{display:flex;flex-wrap:wrap;gap:18px;margin-top:36px;font-size:.85rem;color:rgba(255,255,255,.75)}
.hero-badges li{list-style:none;display:flex;align-items:center;gap:8px}
.hero-badges svg{width:16px;height:16px;color:var(--ember-200)}
.hero-visual{position:relative}
.hero-visual img{border-radius:var(--radius-lg)}
@media (min-width:900px){
  .hero .container{grid-template-columns:1.05fr .95fr}
}

/* ---------- Page hero (interior pages) ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--glacier-950);color:#fff;padding:56px 0 64px}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;max-width:46ch}
.page-hero .lede{color:rgba(255,255,255,.8)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;font-size:.82rem;color:rgba(255,255,255,.65);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.85);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}

/* ---------- Connect strip (call -> match -> house) ---------- */
.connect-strip{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:18px;margin:40px 0}
.connect-strip .node{display:flex;flex-direction:column;align-items:center;gap:10px;width:120px;text-align:center}
.connect-strip .node svg{width:52px;height:52px}
.connect-strip .node span{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--slate)}
.connect-strip .arrow{width:40px;height:2px;background:repeating-linear-gradient(90deg,var(--ember-500) 0 8px, transparent 8px 14px)}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:1fr}
@media (min-width:640px){ .grid-2{grid-template-columns:1fr 1fr} .grid-4{grid-template-columns:1fr 1fr} }
@media (min-width:900px){ .grid-3{grid-template-columns:repeat(3,1fr)} .grid-4{grid-template-columns:repeat(4,1fr)} }

.card{
  background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:26px;box-shadow:var(--shadow-card);
}
.service-card{display:flex;flex-direction:column;gap:14px;text-decoration:none;color:inherit;transition:transform .15s ease, box-shadow .15s ease}
.service-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-pop)}
.service-card .icon{width:44px;height:44px;color:var(--ember-500)}
.service-card h3{margin-bottom:2px}
.service-card p{font-size:.92rem;margin-bottom:0}
.card-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:.9rem;color:var(--glacier-900);margin-top:auto}
.card-link svg{width:15px;height:15px}

.system-card{display:flex;flex-direction:column;gap:12px}
.system-card .icon{width:48px;height:48px;color:var(--glacier-700)}

.problem-row{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line-soft)}
.problem-row:last-child{border-bottom:none}
.problem-row svg{width:26px;height:26px;color:var(--ember-500);flex:none;margin-top:2px}

.why-item{display:flex;gap:16px}
.why-item .icon{width:40px;height:40px;color:var(--glacier-700);flex:none}

/* ---------- Section background variants ---------- */
.bg-ice{background:var(--glacier-100)}
.bg-paper{background:var(--paper)}
.bg-white{background:var(--paper-raised)}
.bg-glacier-deep{background:var(--glacier-950);color:#fff}
.bg-glacier-deep h2,.bg-glacier-deep h3{color:#fff}
.bg-glacier-deep p{color:rgba(255,255,255,.78)}
.section-textured{position:relative;overflow:hidden}

/* ---------- Network / node graphic section ---------- */
.network-panel{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--glacier-950);color:#fff;padding:52px 32px}
.network-panel svg.network-graphic{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.network-panel .content{position:relative;z-index:2;max-width:640px}
.region-list{display:grid;gap:12px;margin-top:28px;grid-template-columns:1fr}
@media (min-width:640px){ .region-list{grid-template-columns:1fr 1fr} }
.region-item{display:flex;align-items:center;gap:10px;padding:12px 16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:10px;font-weight:600;font-size:.92rem}
.region-item svg{width:18px;height:18px;color:var(--ember-200)}

/* ---------- Gauge dial (signature motif #2) ---------- */
.gauge-row{display:flex;flex-wrap:wrap;gap:28px;justify-content:center;margin:36px 0}
.gauge-item{display:flex;flex-direction:column;align-items:center;gap:10px;width:150px;text-align:center}
.gauge-item svg{width:84px;height:84px}
.gauge-item strong{font-family:var(--font-display);font-size:1rem}
.gauge-item span{font-size:.85rem;color:var(--slate)}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;
  padding:20px 4px;font-weight:600;font-family:var(--font-display);font-size:1.02rem;color:var(--glacier-950);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{width:22px;height:22px;flex:none;transition:transform .2s ease}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 4px 22px;color:var(--ink-soft)}

/* ---------- Form ---------- */
.form-panel{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-card)}
.form-row{display:grid;gap:16px;margin-bottom:16px;grid-template-columns:1fr}
@media (min-width:640px){ .form-row-2{grid-template-columns:1fr 1fr} }
label{display:block;font-weight:600;font-size:.88rem;margin-bottom:6px;color:var(--ink)}
input,select,textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:var(--font-body);font-size:.96rem;background:#fff;color:var(--ink);
}
input:focus,select:focus,textarea:focus{border-color:var(--glacier-500)}
.form-consent{font-size:.78rem;color:var(--slate);line-height:1.5;margin-top:6px}
.form-note{
  margin-top:16px;padding:14px 16px;border-radius:10px;background:var(--ember-100);border:1px solid var(--ember-200);
  font-size:.9rem;color:var(--ember-700);
}

/* ---------- Final CTA ---------- */
.final-cta{background:linear-gradient(135deg,var(--ember-600),var(--ember-500));color:#fff;text-align:center;padding:64px 24px;border-radius:var(--radius-lg)}
.final-cta h2{color:#fff}
.final-cta p{color:rgba(255,255,255,.92)}
.final-cta .btn-glacier{background:var(--glacier-950)}
.final-cta .btn-glacier:hover{background:var(--glacier-950);opacity:.9}

/* ---------- Footer ---------- */
.site-footer{background:var(--glacier-950);color:rgba(255,255,255,.8);padding:64px 0 28px;font-size:.92rem}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr}
@media (min-width:640px){ .footer-grid{grid-template-columns:1fr 1fr} } /* cap at 2 columns on tablet — avoids uneven gaps between an 8-item and a 4-item list */
@media (min-width:980px){ .footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr} }
.footer-brand{max-width:320px}
.footer-brand .brand{color:#fff}
.footer-brand p{color:rgba(255,255,255,.62);font-size:.87rem;margin-top:12px}
.footer-col h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.55);margin-bottom:14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer-col a{text-decoration:none;color:rgba(255,255,255,.82);font-size:.9rem}
.footer-col a:hover{color:#fff}
.footer-disclaimer{
  margin-top:44px;padding:24px;border-radius:var(--radius-md);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  font-size:.82rem;line-height:1.65;color:rgba(255,255,255,.72);
}
.footer-disclaimer strong{color:rgba(255,255,255,.88)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:14px 24px;justify-content:space-between;align-items:center;margin-top:28px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:.82rem}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal-links a{text-decoration:none;color:rgba(255,255,255,.7)}
.footer-legal-links a:hover{color:#fff}

/* ---------- Legal pages ---------- */
.legal-content h2{margin-top:2em}
.legal-content h2:first-child{margin-top:0}
.legal-content ul{padding-left:1.2em}
.legal-content .disclaimer-block{background:var(--glacier-100);border:1px solid var(--glacier-200);border-radius:var(--radius-md);padding:22px;font-size:.92rem}

/* ---------- Table of contents style nav for legal ---------- */
.legal-toc{position:sticky;top:96px;display:none}
@media (min-width:960px){ .legal-layout{display:grid;grid-template-columns:220px 1fr;gap:48px} .legal-toc{display:block} }
.legal-toc ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;font-size:.85rem}
.legal-toc a{text-decoration:none;color:var(--slate)}
.legal-toc a:hover{color:var(--glacier-900)}

/* ---------- Misc ---------- */
.two-col{display:grid;gap:40px;grid-template-columns:1fr}
@media (min-width:900px){ .two-col{grid-template-columns:1fr 1fr;align-items:center} }
.stat-row{display:flex;flex-wrap:wrap;gap:32px;margin-top:30px}
.stat{font-family:var(--font-mono)}
.stat strong{display:block;font-size:1.6rem;color:var(--glacier-950)}
.stat span{font-size:.8rem;color:var(--slate)}
.reviews-note{background:var(--glacier-100);border:1px dashed var(--glacier-500);border-radius:var(--radius-md);padding:22px;font-size:.94rem}
.section-head{max-width:680px;margin-bottom:40px}
.center{text-align:center;margin-left:auto;margin-right:auto}