:root {
  --ink: #1c2528;
  --ink-soft: #435156;
  --teal: #0f766e;
  --teal-deep: #075c56;
  --aqua: #14b8a6;
  --amber: #ad4f00;
  --amber-bright: #c85c00;
  --paper: #f7f8f4;
  --white: #ffffff;
  --mist: #e7f1ed;
  --line: #cbd9d4;
  --danger: #a33732;
  --success: #0a6b54;
  --shadow: 0 18px 48px rgb(28 37 40 / 12%);
  --radius-lg: 1.5rem;
  --radius-md: .9rem;
  --content: 80rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, .button { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--amber-bright); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 30; top: -4rem; left: 1rem; padding: .7rem 1rem; border-radius: .4rem; color: var(--white); background: var(--amber); font-weight: 800; }
.skip-link:focus { top: 1rem; }
.container { width: min(calc(100% - 2rem), var(--content)); margin-inline: auto; }
.narrow { width: min(calc(100% - 2rem), 48rem); margin-inline: auto; }
.section { padding: clamp(3.8rem, 7vw, 6.5rem) 0; }
.section-soft { background: var(--mist); }
.eyebrow { margin: 0 0 .75rem; color: var(--teal-deep); font-size: .82rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--ink); line-height: 1.12; letter-spacing: -.035em; }
h1 { max-width: 14ch; margin-bottom: 1.3rem; font-size: clamp(2.5rem, 7vw, 5.25rem); }
.hero h1 { max-width: 26ch; font-size: clamp(2.45rem, 4.25vw, 3.6rem); }
h2 { margin-bottom: 1rem; font-size: clamp(1.9rem, 4.5vw, 3.2rem); }
h3 { margin-bottom: .6rem; font-size: 1.22rem; }
p { color: var(--ink-soft); }
.lead { max-width: 60ch; font-size: clamp(1.08rem, 2vw, 1.28rem); }
.text-link { color: var(--teal-deep); font-weight: 800; text-decoration-thickness: 2px; text-underline-offset: .2em; }

.site-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgb(203 217 212 / 80%); background: rgb(247 248 244 / 92%); backdrop-filter: blur(14px); }
.header-row { min-height: 4.9rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .72rem; text-decoration: none; }
.brand-mark { display: block; width: 2.8rem; height: 2.8rem; flex: 0 0 auto; border-radius: .85rem; background: url("../img/logo-isotipo-ia.png") center / contain no-repeat; font-size: 0; }
.brand-copy { display: grid; line-height: 1.12; }
.brand-copy strong { font-size: .96rem; }
.brand-copy small { margin-top: .18rem; color: var(--ink-soft); font-size: .73rem; }
.nav-toggle { display: none; min-width: 2.75rem; min-height: 2.75rem; border: 1px solid var(--line); border-radius: .6rem; color: var(--ink); background: var(--white); }
.site-nav { display: flex; align-items: center; gap: 1.15rem; }
.site-nav a { position: relative; padding: .65rem 0; color: var(--ink-soft); font-size: .92rem; font-weight: 750; text-decoration: none; }
.site-nav a::after { position: absolute; right: 0; bottom: .22rem; left: 0; height: .18rem; border-radius: 999px; background: var(--amber-bright); content: ""; transform: scaleX(0); transform-origin: left; transition: transform .18s ease; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--teal-deep); }
.site-nav a[aria-current="page"]::after, .site-nav a:hover::after { transform: scaleX(1); }
.header-contact { display: inline-flex; align-items: center; gap: .38rem; padding: .56rem .9rem; border-radius: 999px; color: var(--white); background: var(--amber); box-shadow: 0 .45rem 1.1rem rgb(173 79 0 / 24%); font-size: .8rem; font-weight: 850; text-decoration: none; transition: background .18s ease, transform .18s ease; }
.header-contact-label { color: inherit; }
.header-contact-number { color: inherit; font-size: 1rem; font-weight: 950; letter-spacing: .01em; }
.header-contact:hover { color: var(--white); background: #883f00; transform: translateY(-1px); }

.button-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.7rem; }
.button { display: inline-flex; min-height: 3rem; align-items: center; justify-content: center; gap: .5rem; padding: .75rem 1rem; border: 1px solid transparent; border-radius: .7rem; font-weight: 850; line-height: 1.2; text-align: center; text-decoration: none; cursor: pointer; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--teal); box-shadow: 0 8px 18px rgb(15 118 110 / 22%); }
.button-primary:hover { background: var(--teal-deep); }
.button-secondary { color: var(--ink); border-color: var(--line); background: var(--white); }
.button-secondary:hover { border-color: var(--teal); }
.button-amber { color: var(--white); background: var(--amber); }
.button-amber:hover { color: var(--white); background: #883f00; }

.hero { overflow: hidden; padding: clamp(4rem, 8vw, 7.5rem) 0 clamp(3rem, 6vw, 5.4rem); background-color: #edf6f1; background-image: linear-gradient(96deg, rgb(237 246 241 / 98%) 0%, rgb(247 248 244 / 94%) 43%, rgb(247 248 244 / 53%) 100%), url("../img/diagnostico-hvac.webp"); background-position: center; background-size: cover; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(19rem, .65fr); align-items: center; gap: clamp(1.5rem, 3vw, 3rem); }
.hero-art { position: relative; isolation: isolate; }
.hero-art::before { position: absolute; z-index: -1; top: -1rem; right: -1rem; width: 72%; aspect-ratio: 1; border-radius: 50%; background: var(--amber-bright); content: ""; opacity: .9; }
.hero-art::after { position: absolute; z-index: -1; bottom: -1.5rem; left: -1rem; width: 50%; aspect-ratio: 1; border-radius: 1.5rem; background: var(--aqua); content: ""; opacity: .25; transform: rotate(16deg); }
.hero-art img { width: 100%; min-height: 25rem; object-fit: cover; border: .75rem solid var(--white); border-radius: 7rem 1.5rem 5rem 1.5rem; box-shadow: var(--shadow); }
.hero-note { display: flex; align-items: center; gap: .55rem; margin-top: 1rem; color: var(--ink-soft); font-size: .88rem; }
.hero-note::before { width: .62rem; height: .62rem; flex: 0 0 auto; border-radius: 50%; background: var(--amber-bright); content: ""; }
.quick-services { display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; margin-top: clamp(2rem, 5vw, 4rem); }
.quick-services a { min-height: 8.1rem; padding: 1.1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: rgb(255 255 255 / 72%); text-decoration: none; transition: border .18s ease, transform .18s ease; }
.quick-services a:hover { border-color: var(--teal); transform: translateY(-3px); }
.quick-services strong, .quick-services span { display: block; }
.quick-services strong { margin-bottom: .25rem; font-size: 1.05rem; }
.quick-services span { color: var(--ink-soft); font-size: .88rem; line-height: 1.38; }

.section-head { max-width: 48rem; margin-bottom: 2.2rem; }
.section-head p { margin-bottom: 0; }
.split { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 6rem); }
.split > * { min-width: 0; }
.service-grid, .audience-grid, .process-grid, .faq-grid { display: grid; gap: 1rem; }
.service-grid { grid-template-columns: repeat(3, 1fr); }
.audience-grid { grid-template-columns: repeat(2, 1fr); }
.process-grid { grid-template-columns: repeat(3, 1fr); }
.service-card, .audience-card, .process-card, .contact-card { padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); box-shadow: 0 8px 24px rgb(28 37 40 / 5%); }
.service-card p, .audience-card p, .process-card p { margin-bottom: 0; font-size: .96rem; }
.card-index { display: grid; width: 2.4rem; height: 2.4rem; place-items: center; margin-bottom: 1.15rem; border-radius: .72rem; color: var(--teal-deep); background: #d6f1eb; font-size: .82rem; font-weight: 900; }
.audience-card { min-height: 16rem; padding: clamp(1.5rem, 4vw, 2.4rem); }
.audience-card.home { background: linear-gradient(145deg, #fffdf6, #fff4d9); }
.audience-card.business { color: var(--white); border-color: var(--teal-deep); background: var(--teal-deep); }
.audience-card.business h2, .audience-card.business p { color: inherit; }
.audience-card.business p { color: #d6f1eb; }
.check-list { display: grid; gap: .65rem; padding: 0; margin: 1.25rem 0 0; list-style: none; }
.check-list li { display: grid; grid-template-columns: 1.25rem 1fr; gap: .55rem; color: var(--ink-soft); }
.check-list li::before { color: var(--teal); content: "✓"; font-weight: 900; }
.process-card { position: relative; padding-top: 3.3rem; }
.process-card .step { position: absolute; top: 1.25rem; left: 1.5rem; color: var(--amber-bright); font-size: .82rem; font-weight: 900; letter-spacing: .08em; }
.callout { padding: clamp(1.7rem, 5vw, 3rem); border-radius: var(--radius-lg); color: var(--white); background: var(--ink); }
.callout h2, .callout p { color: inherit; }
.callout p { color: #dbe4df; }
.callout .button-secondary { color: var(--white); border-color: #6a7779; background: transparent; }
.image-panel { overflow: hidden; border-radius: 4rem 1.3rem 1.3rem 1.3rem; background: var(--teal); }
.image-panel img { width: 100%; min-height: 25rem; object-fit: cover; mix-blend-mode: luminosity; opacity: .83; }

.page-hero { padding: clamp(3.8rem, 7vw, 6.5rem) 0 3.3rem; background-color: #e5f1ed; background-image: linear-gradient(96deg, rgb(229 241 237 / 98%) 0%, rgb(247 248 244 / 93%) 47%, rgb(247 248 244 / 44%) 100%), var(--page-hero-image); background-position: center; background-size: cover; }
.page-hero--services { --page-hero-image: url("../img/hero-servicios-ilustrativo.jpg"); }
.page-hero--maintenance { --page-hero-image: url("../img/hero-mantenimiento-ilustrativo.jpg"); }
.page-hero--installation { --page-hero-image: url("../img/hero-instalacion-ilustrativo.jpg"); }
.page-hero--contact { --page-hero-image: url("../img/hero-contacto-ilustrativo.jpg"); }
.page-hero h1 { max-width: 24ch; font-size: clamp(2.4rem, 4.2vw, 3.8rem); }
.page-hero .lead { max-width: 65ch; }
.breadcrumb { margin-bottom: 1.35rem; color: var(--teal-deep); font-size: .86rem; font-weight: 800; }
.breadcrumb a { color: inherit; }

.contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(1.5rem, 5vw, 4rem); align-items: start; }
.contact-options { display: grid; gap: .9rem; }
.contact-option { display: grid; grid-template-columns: 2.5rem 1fr; gap: .8rem; padding: 1.1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); text-decoration: none; }
.contact-option span:first-child { display: grid; width: 2.5rem; height: 2.5rem; place-items: center; border-radius: .65rem; color: var(--teal-deep); background: #d6f1eb; font-weight: 900; }
.contact-option strong, .contact-option small { display: block; }
.contact-option small { color: var(--ink-soft); }
.form-card { padding: clamp(1.4rem, 4vw, 2.3rem); border-radius: var(--radius-lg); background: var(--white); box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.form-field { display: grid; gap: .4rem; color: var(--ink); font-size: .92rem; font-weight: 800; }
.form-field.full { grid-column: 1 / -1; }
.form-field input, .form-field select, .form-field textarea { width: 100%; padding: .78rem .85rem; border: 1px solid #b9cbc5; border-radius: .58rem; color: var(--ink); background: var(--white); font-weight: 500; }
.form-field textarea { min-height: 8rem; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: var(--teal); outline: 2px solid rgb(20 184 166 / 25%); }
.consent { display: flex; align-items: flex-start; gap: .65rem; margin: 1.1rem 0; color: var(--ink-soft); font-size: .9rem; }
.consent input { width: 1.1rem; height: 1.1rem; flex: 0 0 auto; margin-top: .25rem; accent-color: var(--teal); }
.form-status { min-height: 1.55rem; margin: 1rem 0 0; font-size: .92rem; font-weight: 700; }
.form-status.is-error { color: var(--danger); }
.form-status.is-success { color: var(--success); }
.form-note { margin: 1rem 0 0; color: var(--ink-soft); font-size: .82rem; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.faq-grid { grid-template-columns: repeat(2, 1fr); }
details { padding: 1.15rem 1.2rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--white); }
summary { color: var(--ink); cursor: pointer; font-weight: 850; }
details p { margin: .85rem 0 0; }
.legal-copy { max-width: 48rem; }
.legal-notice { padding: 1rem 1.15rem; border-left: .35rem solid var(--amber); background: #fff4d9; color: #55451d; }

.site-footer { padding: 3.5rem 0 5.8rem; color: #d5dfdc; background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.footer-title { margin-bottom: .7rem; color: var(--white); font-size: 1rem; letter-spacing: 0; }
.footer-grid p, .footer-grid li, .footer-grid a { color: #b9c9c4; }
.footer-grid ul { display: grid; gap: .35rem; padding: 0; margin: 0; list-style: none; }
.footer-grid a:hover { color: var(--white); }
.footer-brand .brand-copy strong, .footer-brand .brand-copy small { color: var(--white); }
.footer-brand .brand-copy small { color: #b9c9c4; }
.footer-meta { margin-top: 1.5rem; font-size: .82rem; }
.floating-cta { position: fixed; z-index: 18; right: 1rem; bottom: 1rem; display: flex; gap: .55rem; padding: .48rem; border: 1px solid rgb(255 255 255 / 36%); border-radius: .85rem; background: rgb(28 37 40 / 92%); box-shadow: var(--shadow); }
.floating-cta .button { min-height: 2.65rem; padding: .6rem .8rem; font-size: .88rem; }
.floating-cta .button-secondary { color: var(--white); border-color: transparent; background: var(--amber); }
.floating-cta .button-secondary:hover { color: var(--white); background: #883f00; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-grid; place-items: center; }
  .site-nav { position: absolute; top: 100%; right: 1rem; left: 1rem; display: none; align-items: stretch; gap: 0; padding: .5rem; border: 1px solid var(--line); border-radius: .8rem; background: var(--white); box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: .78rem .7rem; border-radius: .45rem; }
  .site-nav a:hover { background: var(--mist); }
  .header-contact { margin-left: auto; }
  .hero-grid, .contact-layout { grid-template-columns: 1fr; }
  .hero-art { max-width: 38rem; }
  .hero-art img { min-height: 19rem; }
  .split { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .container, .narrow { width: min(calc(100% - 1.25rem), var(--content)); }
  .brand-copy small, .header-contact { display: none; }
  .hero, .page-hero { background-position: 62% center; }
  .quick-services, .service-grid, .audience-grid, .process-grid, .faq-grid, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .quick-services a { min-height: auto; }
  .hero-art img { min-height: 16rem; border-width: .45rem; border-radius: 4rem 1.1rem 3rem 1.1rem; }
  .form-field.full { grid-column: auto; }
  .floating-cta { right: .55rem; bottom: .55rem; left: .55rem; justify-content: center; }
  .floating-cta .button { flex: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}