/* GM HVAC&R — Tech-style landing page (Netlify-ready) */
:root{
  --bg: #050b16;
  --panel: rgba(15,23,42,.72);
  --panel2: rgba(2,6,23,.58);
  --text: #e6eefc;
  --muted: rgba(230,238,252,.72);
  --line: rgba(230,238,252,.14);
  --accent: #2dd4bf; /* teal */
  --accent2: #60a5fa; /* blue */
  --shadow: 0 24px 70px rgba(2,6,23,.55);
  --radius: 22px;
  --radius2: 16px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

a{ color: inherit; text-decoration: none; }
a:hover{ opacity:.92; }

.container{
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(5,11,22,.62);
  border-bottom: 1px solid var(--line);
}

.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 220px;
}
.brand__mark{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 25px rgba(2,6,23,.35);
  background: rgba(255,255,255,.03);
}
.brand__name{
  font-weight: 760;
  letter-spacing: .2px;
}
.brand__tag{
  font-size: 12px;
  color: var(--muted);
  margin-top: 1px;
}

.nav{
  display:flex;
  align-items:center;
  gap: 18px;
}
.nav a{
  font-size: 14px;
  color: rgba(230,238,252,.82);
}
.nav__cta{
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(45,212,191,.35);
  background: rgba(45,212,191,.12);
}

.navbtn{
  display:none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text);
}
.navbtn span{
  display:block;
  width: 18px;
  height: 2px;
  background: rgba(230,238,252,.85);
  margin: 4px auto;
  border-radius: 2px;
}

.hero{
  position: relative;
  overflow: hidden;
  padding: 82px 0 54px;
  border-bottom: 1px solid var(--line);
}
.hero__bg{
  position:absolute;
  inset:-1px;
  background:
    radial-gradient(900px 420px at 12% 18%, rgba(96,165,250,.22), transparent 65%),
    radial-gradient(700px 380px at 88% 20%, rgba(45,212,191,.18), transparent 62%),
    radial-gradient(650px 520px at 60% 95%, rgba(15,23,42,.55), transparent 62%),
    linear-gradient(180deg, rgba(2,6,23,.15), rgba(2,6,23,.75)),
    /* technical grid */
    linear-gradient(rgba(230,238,252,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230,238,252,.05) 1px, transparent 1px);
  background-size:
    auto, auto, auto, auto,
    44px 44px,
    44px 44px;
  background-position:
    center, center, center, center,
    0 0,
    0 0;
  filter: saturate(1.05);
}

.hero__glow{
  position:absolute;
  inset: 0;
  background:
    radial-gradient(900px 420px at 22% 44%, rgba(45,212,191,.10), transparent 60%),
    radial-gradient(820px 420px at 78% 44%, rgba(96,165,250,.10), transparent 60%);
  pointer-events:none;
}

.hero__inner{
  position: relative;
  display:grid;
  grid-template-columns: 1.4fr .9fr;
  gap: 26px;
  align-items: start;
}

.hero__panel{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.kicker{
  display:inline-block;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(230,238,252,.78);
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(96,165,250,.20);
  background: rgba(96,165,250,.08);
}

h1{
  margin: 14px 0 12px;
  font-size: clamp(30px, 3.2vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lead{
  margin: 0 0 18px;
  color: rgba(230,238,252,.82);
  font-size: 16px;
  max-width: 56ch;
}

.hero__cta{
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text);
  font-weight: 650;
  font-size: 14px;
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn--primary{
  background: linear-gradient(135deg, rgba(45,212,191,.92), rgba(96,165,250,.90));
  border-color: rgba(255,255,255,.16);
  color: rgba(2,6,23,.92);
}
.btn--ghost{
  background: rgba(255,255,255,.02);
  border-color: rgba(230,238,252,.18);
}

.hero__meta{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(230,238,252,.12);
}
.meta{
  padding: 10px 10px;
  border-radius: 14px;
  background: rgba(2,6,23,.22);
  border: 1px solid rgba(230,238,252,.10);
}
.meta__num{
  font-weight: 800;
  letter-spacing: -0.01em;
}
.meta__label{
  font-size: 12px;
  color: rgba(230,238,252,.70);
  margin-top: 2px;
}

.hero__card{
  background: var(--panel2);
  border: 1px solid rgba(230,238,252,.14);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 20px 60px rgba(2,6,23,.50);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.card__title{
  font-weight: 800;
  letter-spacing: .2px;
  margin-bottom: 10px;
}

.checklist{
  list-style:none;
  padding:0;
  margin: 0;
  display:flex;
  flex-direction:column;
  gap: 10px;
  color: rgba(230,238,252,.84);
}
.checklist li{
  position:relative;
  padding-left: 26px;
}
.checklist li:before{
  content:"";
  position:absolute;
  left: 0;
  top: .25em;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: rgba(45,212,191,.16);
  border: 1px solid rgba(45,212,191,.38);
  box-shadow: 0 8px 18px rgba(45,212,191,.10);
}
.checklist li:after{
  content:"";
  position:absolute;
  left: 4px;
  top: .62em;
  width: 6px;
  height: 3px;
  border-left: 2px solid rgba(230,238,252,.85);
  border-bottom: 2px solid rgba(230,238,252,.85);
  transform: rotate(-45deg);
}

.card__note{
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(230,238,252,.12);
  color: rgba(230,238,252,.72);
  font-size: 13px;
}

.section{
  padding: 54px 0;
}
.section--alt{
  background: radial-gradient(900px 420px at 18% 30%, rgba(96,165,250,.10), transparent 60%),
              radial-gradient(820px 420px at 82% 30%, rgba(45,212,191,.08), transparent 62%),
              rgba(255,255,255,.01);
  border-top: 1px solid rgba(230,238,252,.08);
  border-bottom: 1px solid rgba(230,238,252,.08);
}
.section__head{
  margin-bottom: 22px;
}
.section__head h2, .section__head h1{
  margin: 0 0 8px;
  font-size: clamp(22px, 2.1vw, 32px);
  letter-spacing: -0.01em;
}
.section__head p{
  margin: 0;
  color: rgba(230,238,252,.75);
  max-width: 70ch;
}

.grid{
  display:grid;
  gap: 14px;
}
.cards{
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.card{
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(230,238,252,.12);
  border-radius: var(--radius2);
  padding: 18px;
  box-shadow: 0 14px 40px rgba(2,6,23,.35);
}
.card h3{
  margin: 0 0 8px;
  font-size: 16px;
}
.card p{
  margin: 0;
  color: rgba(230,238,252,.75);
  font-size: 14px;
}

.split{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
  align-items:start;
}
.bullets{
  margin: 14px 0 0;
  padding-left: 18px;
  color: rgba(230,238,252,.80);
}
.bullets li{ margin: 7px 0; }

.callout{
  background: rgba(2,6,23,.35);
  border: 1px solid rgba(96,165,250,.18);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 24px 70px rgba(2,6,23,.50);
}
.callout__title{
  font-weight: 800;
  margin-bottom: 8px;
}
.callout p{
  margin: 0 0 14px;
  color: rgba(230,238,252,.76);
}
.callout__cta{ display:flex; gap: 12px; flex-wrap:wrap; }

.timeline{
  display:grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 14px;
}
.step{
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(230,238,252,.12);
  border-radius: var(--radius2);
  padding: 18px;
}
.step__num{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 800;
  color: rgba(2,6,23,.9);
  background: linear-gradient(135deg, rgba(45,212,191,.88), rgba(96,165,250,.82));
  margin-bottom: 10px;
}
.step h3{ margin: 0 0 6px; font-size: 15px; }
.step p{ margin: 0; color: rgba(230,238,252,.75); font-size: 13px; }

.section--cta{
  padding: 44px 0;
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
}
.cta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
  background: rgba(15,23,42,.62);
  border: 1px solid rgba(230,238,252,.14);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.cta h2{ margin: 0 0 6px; font-size: 22px; }
.cta p{ margin: 0; color: rgba(230,238,252,.75); max-width: 70ch; }
.cta__buttons{ display:flex; gap: 12px; flex-wrap:wrap; }

.footer{
  border-top: 1px solid rgba(230,238,252,.10);
  padding: 26px 0;
  background: rgba(2,6,23,.35);
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  gap: 18px;
  align-items:flex-start;
  flex-wrap: wrap;
}
.footer__brand{
  display:flex;
  gap: 12px;
  align-items:center;
}
.footer__mark{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(230,238,252,.12);
  background: rgba(255,255,255,.03);
}
.footer__name{ font-weight: 800; }
.footer__small{ color: rgba(230,238,252,.72); font-size: 12px; }
.footer__cols{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  min-width: min(720px, 100%);
}
.footer__title{ font-weight: 800; font-size: 13px; margin-bottom: 6px; }
.footer__small a{ text-decoration: underline; text-underline-offset: 3px; }

/* Contact page */
.page{ padding-top: 14px; }
.split--contact{ grid-template-columns: 1fr .9fr; }
.form{
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(230,238,252,.12);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 18px 55px rgba(2,6,23,.40);
}
label{ display:block; margin-bottom: 12px; }
label span{ display:block; font-size: 12px; color: rgba(230,238,252,.72); margin-bottom: 6px; }
input, textarea{
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(230,238,252,.14);
  background: rgba(2,6,23,.35);
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus{
  border-color: rgba(45,212,191,.45);
  box-shadow: 0 0 0 4px rgba(45,212,191,.10);
}
.form__note{
  margin-top: 10px;
  color: rgba(230,238,252,.72);
  font-size: 13px;
}
.form__note a{ text-decoration: underline; text-underline-offset: 3px; }

.contactcard{
  background: rgba(15,23,42,.50);
  border: 1px solid rgba(230,238,252,.14);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 18px 55px rgba(2,6,23,.38);
}
.contactcard__title{ font-weight: 800; margin-bottom: 12px; }
.contactcard__row{ display:grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid rgba(230,238,252,.10); }
.contactcard__row:first-of-type{ border-top: 0; padding-top: 0; }
.contactcard__label{ color: rgba(230,238,252,.65); font-size: 12px; }
.contactcard__value a{ text-decoration: underline; text-underline-offset: 3px; }
.contactcard__note{ margin-top: 14px; padding-top: 14px; border-top: 1px solid rgba(230,238,252,.10); color: rgba(230,238,252,.72); font-size: 13px; }

/* Responsive */
@media (max-width: 980px){
  .hero__inner{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .timeline{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .footer__cols{ grid-template-columns: 1fr; min-width: 100%; }
  .split{ grid-template-columns: 1fr; }
}
@media (max-width: 640px){
  .container{ width: calc(100% - 28px); }
  .navbtn{ display:block; }
  .nav{ 
    position: absolute;
    right: 14px;
    top: 68px;
    background: rgba(5,11,22,.85);
    border: 1px solid rgba(230,238,252,.12);
    border-radius: 16px;
    padding: 10px;
    display:none;
    flex-direction: column;
    width: min(260px, calc(100% - 28px));
    box-shadow: 0 24px 70px rgba(2,6,23,.55);
  }
  .nav.open{ display:flex; }
  .nav--static{ display:flex; position: static; background: transparent; border: 0; padding: 0; box-shadow: none; width:auto; flex-direction: row; }
  h1{ font-size: 34px; }
  .hero{ padding-top: 78px; }
  .cta{ flex-direction: column; align-items:flex-start; }
  .cards{ grid-template-columns: 1fr; }
  .timeline{ grid-template-columns: 1fr; }
}