/* Stivers HVAC, INC — premium, clean, accessible */
/* No external CSS dependencies. */

:root{
  --bg: #0B1220;
  --surface: #0F1A2B;
  --card: #0E1C30;
  --text: #EAF2FF;
  --muted: rgba(234,242,255,.72);
  --muted2: rgba(234,242,255,.55);
  --line: rgba(234,242,255,.12);
  --brand: #1F6FEB;
  --brand2:#66B3FF;
  --ok:#2DD4BF;
  --warn:#FBBF24;
  --danger:#FB7185;
  --shadow: 0 18px 50px rgba(0,0,0,.55);
  --radius: 18px;
  --radius2: 26px;
  --max: 1160px;
  --focus: 0 0 0 3px rgba(31,111,235,.35);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(1200px 700px at 20% 5%, rgba(31,111,235,.18), transparent 55%),
              radial-gradient(900px 600px at 85% 15%, rgba(45,212,191,.12), transparent 55%),
              radial-gradient(1200px 700px at 50% 120%, rgba(102,179,255,.10), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height:1.55;
}
a{ color: var(--text); text-decoration: none; }
a:hover{ text-decoration: underline; }
img{ max-width:100%; height:auto; display:block; }
button, input, select, textarea{ font: inherit; color: inherit; }
::selection{ background: rgba(31,111,235,.35); }

.container{ width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.skip{
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip:focus{
  left:16px; top:16px; width:auto; height:auto; padding:10px 12px;
  background: #0b2140; border:1px solid var(--line); border-radius: 10px; z-index:9999;
  box-shadow: var(--shadow);
}

.topbar{
  border-bottom:1px solid var(--line);
  background: rgba(11,18,32,.72);
  backdrop-filter: blur(10px);
}
.topbar .row{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:10px 0;
  color: var(--muted);
  font-size: 13px;
}
.topbar a{ color: var(--muted); text-decoration: none; }
.topbar a:hover{ color: var(--text); text-decoration: none; }

header.site{
  position: sticky; top:0; z-index:50;
  background: rgba(11,18,32,.60);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
header .nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand{
  display:flex; align-items:center; gap:12px;
  text-decoration:none;
}
.brand-mark{
  width:40px; height:40px; border-radius:14px;
  background: linear-gradient(135deg, rgba(31,111,235,.95), rgba(102,179,255,.70));
  box-shadow: 0 18px 45px rgba(31,111,235,.20);
  display:grid; place-items:center;
  border:1px solid rgba(255,255,255,.12);
}
.brand-mark span{
  font-weight:900; letter-spacing:-0.02em; font-size: 18px;
}
.brand-text .name{ font-weight:900; letter-spacing:-0.02em; line-height:1.1; }
.brand-text .tag{ font-size:12px; color: var(--muted); margin-top:2px; }

.navlinks{
  display:flex; align-items:center; gap:18px; flex-wrap:wrap;
}
.navlinks a{
  padding:10px 10px; border-radius: 12px; text-decoration:none;
  color: var(--muted);
}
.navlinks a:hover{ color: var(--text); text-decoration:none; background: rgba(255,255,255,.06); }
.navlinks a[aria-current="page"]{
  color: var(--text);
  background: rgba(31,111,235,.18);
  border:1px solid rgba(31,111,235,.30);
}

.cta{
  display:flex; align-items:center; gap:10px;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: var(--text);
  text-decoration:none;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  cursor:pointer;
}
.btn:hover{ text-decoration:none; background: rgba(255,255,255,.10); transform: translateY(-1px); }
.btn:focus{ outline:none; box-shadow: var(--focus); }
.btn.primary{
  background: linear-gradient(135deg, rgba(31,111,235,.95), rgba(102,179,255,.75));
  border-color: rgba(255,255,255,.16);
}
.btn.primary:hover{ background: linear-gradient(135deg, rgba(31,111,235,1), rgba(102,179,255,.82)); }
.btn.ghost{ background: transparent; }
.btn.small{ padding: 9px 12px; border-radius: 12px; font-size: 14px; }
.pill{
  display:inline-flex; align-items:center; gap:8px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  color: var(--muted);
  font-size: 13px;
  text-decoration:none;
}
.pill strong{ color: var(--text); font-weight: 800; }

.hero{
  padding: 56px 0 22px;
}
.hero .grid{
  display:grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 26px;
  align-items: start;
}
.kicker{
  display:inline-flex; align-items:center; gap:8px;
  color: var(--muted);
  font-size: 13px;
  padding: 7px 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 999px;
}
.kicker .dot{
  width:8px; height:8px; border-radius:999px; background: var(--ok);
  box-shadow: 0 0 0 4px rgba(45,212,191,.16);
}
h1{
  font-size: clamp(32px, 4vw, 52px);
  line-height:1.06;
  letter-spacing:-0.03em;
  margin: 14px 0 12px;
}
.lead{
  font-size: 18px;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 18px;
}
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin: 18px 0 10px; }
.hero-meta{
  display:flex; gap:14px; flex-wrap:wrap;
  margin-top: 16px;
}
.stat{
  padding: 12px 14px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  min-width: 160px;
}
.stat .num{ font-weight: 900; font-size: 18px; letter-spacing:-0.02em; }
.stat .lbl{ color: var(--muted); font-size: 13px; margin-top:2px; }

.panel{
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow);
  padding: 18px;
  overflow:hidden;
}
.panel h3{ margin: 0 0 10px; letter-spacing:-0.02em; }
.panel p{ margin: 0 0 14px; color: var(--muted); }
.list{
  display:grid; gap:10px; margin:0; padding:0; list-style:none;
}
.list li{
  display:flex; gap:10px; align-items:flex-start;
  padding: 11px 12px;
  border-radius: 14px;
  background: rgba(11,18,32,.55);
  border: 1px solid rgba(255,255,255,.10);
}
.badge{
  flex:0 0 auto;
  width: 26px; height: 26px; border-radius: 9px;
  background: rgba(31,111,235,.20);
  border: 1px solid rgba(31,111,235,.35);
  display:grid; place-items:center;
  color: var(--brand2);
  font-weight: 900;
}
.smallmuted{ color: var(--muted2); font-size: 13px; }
hr.sep{
  border: none; border-top: 1px solid var(--line);
  margin: 22px 0;
}

.section{ padding: 26px 0; }
.section h2{
  font-size: clamp(22px, 2.4vw, 32px);
  margin: 0 0 8px;
  letter-spacing:-0.02em;
}
.section .sub{ color: var(--muted); margin: 0 0 16px; max-width: 74ch; }

.cards{
  display:grid; gap:16px;
  grid-template-columns: repeat(3, 1fr);
}
.card{
  border-radius: var(--radius2);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  padding: 16px;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  min-height: 160px;
}
.card:hover{
  transform: translateY(-2px);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.14);
}
.card .title{ font-weight: 900; letter-spacing:-0.02em; margin: 0 0 8px; }
.card p{ margin: 0; color: var(--muted); }
.card .meta{ margin-top: 12px; color: var(--muted2); font-size: 13px; }

.grid2{ display:grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid3{ display:grid; grid-template-columns: repeat(3,1fr); gap: 18px; }

.breadcrumbs{
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.breadcrumbs a{ color: var(--muted); text-decoration:none; }
.breadcrumbs a:hover{ color: var(--text); text-decoration:none; }
.breadcrumbs span{ color: var(--muted2); }

.form{
  display:grid; gap: 12px;
}
.field{
  display:grid; gap: 6px;
}
label{ font-weight: 700; }
.hint{ color: var(--muted2); font-size: 13px; }
input[type="text"], input[type="email"], input[type="tel"], select, textarea{
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  background: rgba(11,18,32,.65);
  border: 1px solid rgba(255,255,255,.14);
  outline:none;
}
textarea{ min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus{ box-shadow: var(--focus); border-color: rgba(31,111,235,.55); }

.notice{
  padding: 12px 12px;
  border-radius: 16px;
  background: rgba(31,111,235,.14);
  border: 1px solid rgba(31,111,235,.30);
  color: var(--text);
}
.notice.warn{
  background: rgba(251,191,36,.12);
  border-color: rgba(251,191,36,.26);
}
.notice.ok{
  background: rgba(45,212,191,.12);
  border-color: rgba(45,212,191,.26);
}

footer{
  margin-top: 24px;
  border-top: 1px solid var(--line);
  background: rgba(11,18,32,.60);
}
footer .cols{
  padding: 22px 0;
  display:grid; gap: 18px;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
}
footer .small{ color: var(--muted); font-size: 13px; }
footer h4{ margin:0 0 10px; letter-spacing:-0.02em; }
footer a{ color: var(--muted); text-decoration:none; display:inline-block; padding: 4px 0; }
footer a:hover{ color: var(--text); text-decoration:none; }
footer .bottom{
  border-top: 1px solid var(--line);
  padding: 12px 0;
  color: var(--muted2);
  font-size: 12px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap: 10px;
}

.dialog-backdrop{
  position:fixed; inset:0;
  background: rgba(0,0,0,.55);
  display:none;
  z-index: 9999;
}
.dialog{
  position: fixed; left:50%; top:50%;
  transform: translate(-50%, -50%);
  width: min(720px, calc(100% - 28px));
  max-height: min(80vh, 760px);
  overflow:auto;
  background: rgba(15,26,43,.92);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 16px;
  display:none;
  z-index: 10000;
}
.dialog header{
  display:flex; justify-content:space-between; align-items:flex-start; gap: 10px;
  margin-bottom: 12px;
}
.dialog header h3{ margin:0; }
.dialog .close{
  background: transparent;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  padding: 8px 10px;
  cursor:pointer;
}
.dialog .close:hover{ background: rgba(255,255,255,.08); }
.toggle-row{
  display:flex; justify-content:space-between; align-items:center; gap:10px;
  padding: 12px 12px;
  border-radius: 16px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  margin-bottom: 10px;
}
.toggle-row .left{
  display:grid; gap: 2px;
}
.toggle-row .left .t{ font-weight: 900; }
.toggle-row .left .d{ color: var(--muted); font-size: 13px; }
.switch{
  width: 48px; height: 28px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.10);
  position: relative;
  flex:0 0 auto;
}
.switch::after{
  content:"";
  width: 22px; height: 22px;
  border-radius: 999px;
  background: rgba(255,255,255,.90);
  position:absolute;
  top:50%; left: 3px;
  transform: translateY(-50%);
  transition: left .15s ease, background .15s ease;
}
.switch.on{
  background: rgba(31,111,235,.35);
  border-color: rgba(31,111,235,.55);
}
.switch.on::after{ left: 23px; background: white; }
.switch.disabled{
  opacity: .55;
  cursor:not-allowed;
}
.switch:not(.disabled){ cursor:pointer; }

@media (max-width: 980px){
  .hero .grid{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: 1fr 1fr; }
  footer .cols{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px){
  .navlinks{ display:none; }
  .cards{ grid-template-columns: 1fr; }
  .grid2, .grid3{ grid-template-columns: 1fr; }
  .topbar .row{ flex-direction:column; align-items:flex-start; }
}