/* =========================================================
   GASEC INSTALACIONES — hoja de estilos
   Paleta: azules y blancos, estética técnica/industrial
   ========================================================= */

:root{
  /* Color */
  --blue-900:#0A2E4D;   /* cabecera/footer, texto fuerte */
  --blue-700:#0E5C9E;   /* marca principal */
  --blue-600:#136BB5;
  --blue-500:#1C86D6;   /* acento, hover, enlaces */
  --blue-100:#E8F2FA;   /* fondos suaves */
  --blue-50:#F5FAFE;
  --white:#FFFFFF;
  --ink:#0F2438;        /* texto principal */
  --ink-soft:#4C6478;   /* texto secundario */
  --border:#D7E6F2;
  --shadow: 0 10px 30px rgba(10,46,77,0.10);

  /* Tipografia */
  --font-head:"Archivo", "Segoe UI", Arial, sans-serif;
  --font-body:"Public Sans", "Segoe UI", Arial, sans-serif;

  /* Layout */
  --max: 1180px;
  --radius: 4px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:var(--blue-700); text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{
  font-family:var(--font-head);
  color:var(--blue-900);
  margin:0 0 .5em;
  line-height:1.2;
  font-weight:700;
}
p{ margin:0 0 1em; }
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 24px;
}
:focus-visible{
  outline:3px solid var(--blue-500);
  outline-offset:2px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Topbar ---------- */
.topbar{
  background:var(--blue-900);
  color:var(--blue-100);
  font-size:.85rem;
}
.topbar .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-top:8px;
  padding-bottom:8px;
  gap:16px;
  flex-wrap:wrap;
}
.topbar a{ color:var(--blue-100); }
.topbar a:hover{ color:var(--white); }
.topbar-contact{ display:flex; gap:20px; flex-wrap:wrap; }
.topbar-contact span{ display:inline-flex; align-items:center; gap:6px; }
.topbar-social{ display:flex; gap:14px; }
.topbar-social svg{ width:16px; height:16px; fill:var(--blue-100); }
.topbar-social a:hover svg{ fill:var(--white); }

/* ---------- Header / Nav ---------- */
.site-header{
  background:var(--white);
  border-bottom:1px solid var(--border);
  position:sticky;
  top:0;
  z-index:50;
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:14px;
  padding-bottom:14px;
  gap:20px;
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height:52px; width:auto; }
.brand-name{ font-family:var(--font-head); font-weight:700; color:var(--blue-900); font-size:1.15rem; }
.brand-name small{ display:block; font-family:var(--font-body); font-weight:400; color:var(--ink-soft); font-size:.72rem; }

.main-nav ul{ display:flex; gap:8px; }
.main-nav a{
  display:block;
  padding:10px 16px;
  color:var(--blue-900);
  font-weight:600;
  border-radius:var(--radius);
}
.main-nav a:hover{ background:var(--blue-100); color:var(--blue-700); }
.main-nav a.active{ color:var(--blue-700); }
.main-nav a.active::after{ content:""; }

.nav-toggle{
  display:none;
  background:none;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:8px 10px;
  cursor:pointer;
}
.nav-toggle svg{ width:22px; height:22px; fill:var(--blue-900); }

@media (max-width: 860px){
  .nav-toggle{ display:inline-flex; }
  .main-nav{
    position:absolute;
    top:100%; left:0; right:0;
    background:var(--white);
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);
    display:none;
  }
  .main-nav.open{ display:block; }
  .main-nav ul{ flex-direction:column; padding:10px 24px 18px; }
  .main-nav a{ padding:12px 4px; border-bottom:1px solid var(--blue-100); }
  .topbar-contact span:nth-child(2){ display:none; }
}

/* ---------- Hero (home) ---------- */
.hero{
  position:relative;
  min-height:78vh;
  display:flex;
  align-items:center;
  background:linear-gradient(115deg, rgba(10,46,77,0.92) 0%, rgba(14,92,158,0.72) 45%, rgba(14,92,158,0.35) 100%), var(--blue-900);
  background-size:cover;
  color:var(--white);
  overflow:hidden;
}
.hero-bg{
  position:absolute; inset:0;
  background-size:cover;
  background-position:center;
  z-index:-1;
}
.hero .container{ padding-top:60px; padding-bottom:60px; }
.hero-content{ max-width:640px; }
.hero-content h1{
  color:var(--white);
  font-size:clamp(2rem, 4vw, 3rem);
  margin-bottom:.6em;
}
.hero-content p{
  color:var(--blue-100);
  font-size:1.1rem;
  max-width:520px;
}
.hero-actions{ display:flex; gap:14px; margin-top:26px; flex-wrap:wrap; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--radius);
  font-weight:700;
  font-family:var(--font-head);
  font-size:.95rem;
  border:2px solid transparent;
  cursor:pointer;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary{ background:var(--blue-500); color:var(--white); }
.btn-primary:hover{ background:var(--white); color:var(--blue-700); border-color:var(--white); }
.btn-outline{ border-color:rgba(255,255,255,0.75); color:var(--white); }
.btn-outline:hover{ background:var(--white); color:var(--blue-900); }
.btn-dark{ background:var(--blue-900); color:var(--white); }
.btn-dark:hover{ background:var(--blue-700); }

/* ---------- Feature strip (3 imagenes bajo el hero) ---------- */
.feature-strip{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--border);
}
.feature-card{
  position:relative;
  min-height:260px;
  background-size:cover;
  background-position:center;
  display:flex;
  align-items:flex-end;
  color:var(--white);
}
.feature-card::before{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(10,46,77,0) 40%, rgba(10,46,77,0.85) 100%);
}
.feature-card span{
  position:relative;
  z-index:1;
  padding:22px;
  font-family:var(--font-head);
  font-weight:700;
  font-size:1.05rem;
}
@media (max-width: 760px){
  .feature-strip{ grid-template-columns:1fr; }
}

/* ---------- Secciones genericas ---------- */
section{ padding:76px 0; }
.section-alt{ background:var(--blue-50); }
.section-head{ max-width:680px; margin-bottom:44px; }
.section-head .eyebrow{ color:var(--blue-700); font-weight:700; }
.section-head p{ color:var(--ink-soft); font-size:1.05rem; }

.about-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:56px;
  align-items:start;
}
@media (max-width: 860px){
  .about-grid{ grid-template-columns:1fr; }
}
.about-copy p{ color:var(--ink-soft); font-size:1.05rem; }
.strength-list{ display:flex; flex-direction:column; gap:16px; }
.strength-list li{
  display:flex;
  gap:14px;
  align-items:flex-start;
  background:var(--white);
  border:1px solid var(--border);
  border-left:4px solid var(--blue-500);
  padding:16px 18px;
  border-radius:var(--radius);
}
.strength-list svg{ flex:none; width:22px; height:22px; fill:var(--blue-700); margin-top:2px; }
.strength-list strong{ display:block; color:var(--blue-900); }

/* ---------- Marcas / técnico autorizado ---------- */
.brands-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  gap:24px;
}
@media (max-width: 560px){ .brands-grid{ grid-template-columns:1fr; } }
.brand-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px;
  text-align:center;
}
.brand-card img{ max-height:64px; width:auto; margin:0 auto 18px; }
.brand-card p{ color:var(--ink-soft); margin:0; font-size:.95rem; }

/* ---------- Clientes ---------- */
.clients-grid{
  display:grid;
  grid-template-columns:repeat(6, 1fr);
  gap:18px;
  align-items:center;
}
.clients-grid img{
  filter:grayscale(1) opacity(.7);
  transition:filter .15s ease;
  max-height:46px;
  width:auto;
  margin:0 auto;
}
.clients-grid img:hover{ filter:none; }
@media (max-width: 760px){
  .clients-grid{ grid-template-columns:repeat(3, 1fr); row-gap:26px; }
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--blue-700);
  background:linear-gradient(120deg, var(--blue-900), var(--blue-700));
  color:var(--white);
  padding:56px 0;
}
.cta-band .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  flex-wrap:wrap;
}
.cta-band h2{ color:var(--white); margin:0; }
.cta-band p{ color:var(--blue-100); margin:6px 0 0; }

/* ---------- Page banner (paginas interiores) ---------- */
.page-banner{
  background:linear-gradient(120deg, var(--blue-900), var(--blue-700));
  color:var(--white);
  padding:64px 0;
}
.page-banner h1{ color:var(--white); margin-bottom:.3em; }
.page-banner p{ color:var(--blue-100); max-width:620px; margin:0; }

/* ---------- Servicios ---------- */
.services-groups{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}
@media (max-width: 980px){ .services-groups{ grid-template-columns:1fr; } }
.service-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:30px 28px;
}
.service-card h3{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--blue-700);
  font-size:1.15rem;
  border-bottom:2px solid var(--blue-100);
  padding-bottom:14px;
  margin-bottom:16px;
}
.service-card ul{ display:flex; flex-direction:column; gap:12px; }
.service-card li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  color:var(--ink-soft);
}
.service-card li svg{ flex:none; width:18px; height:18px; fill:var(--blue-500); margin-top:3px; }
.service-card li a{ color:var(--ink-soft); text-decoration:underline; text-decoration-color:var(--border); text-underline-offset:3px; }
.service-card li a:hover{ color:var(--blue-700); text-decoration-color:var(--blue-500); }

/* ---------- Contacto / Localizanos ---------- */
.contact-layout{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:48px;
}
@media (max-width: 900px){ .contact-layout{ grid-template-columns:1fr; } }

.info-card{
  background:var(--blue-900);
  color:var(--blue-100);
  border-radius:var(--radius);
  padding:34px;
}
.info-card h3{ color:var(--white); }
.info-list{ display:flex; flex-direction:column; gap:16px; margin-top:18px; }
.info-list li{ display:flex; gap:12px; align-items:flex-start; }
.info-list svg{ flex:none; width:20px; height:20px; fill:var(--blue-500); margin-top:3px; }
.info-list a{ color:var(--white); }
.info-card .btn{ margin-top:24px; }

.map-frame{
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  height:340px;
  margin-top:26px;
}
.map-frame iframe{ width:100%; height:100%; border:0; }

.form-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:34px;
  box-shadow:var(--shadow);
}
.form-row{ margin-bottom:20px; }
.form-row label{
  display:block;
  font-weight:700;
  color:var(--blue-900);
  margin-bottom:8px;
  font-size:.92rem;
}
.form-row input,
.form-row textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:1rem;
  color:var(--ink);
  background:var(--blue-50);
}
.form-row input:focus,
.form-row textarea:focus{
  outline:none;
  border-color:var(--blue-500);
  background:var(--white);
}
.form-note{ font-size:.85rem; color:var(--ink-soft); margin-top:14px; }
.form-success{
  display:none;
  background:var(--blue-100);
  border:1px solid var(--blue-500);
  color:var(--blue-900);
  padding:14px 16px;
  border-radius:var(--radius);
  margin-bottom:20px;
  font-weight:600;
}

/* ---------- Detalle de servicio ---------- */
.breadcrumb{
  font-size:.9rem;
  color:var(--ink-soft);
  margin-bottom:18px;
}
.breadcrumb a{ color:var(--blue-100); font-weight:600; }
.breadcrumb a:hover{ color:var(--white); }
.breadcrumb span{ color:var(--blue-100); opacity:.6; margin:0 6px; }

.service-detail{
  display:grid;
  grid-template-columns:1.4fr .9fr;
  gap:48px;
  align-items:start;
}
@media (max-width: 900px){
  .service-detail{ grid-template-columns:1fr; }
}
.service-tagline{
  color:var(--blue-700);
  font-weight:700;
  font-size:1.05rem;
  border-left:4px solid var(--blue-500);
  padding-left:14px;
  margin-bottom:22px;
}
.service-copy p{ color:var(--ink-soft); font-size:1.05rem; }
.service-copy strong{ color:var(--blue-900); }

.spec-list{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px 24px;
  margin:22px 0;
}
.spec-list h4{ color:var(--blue-700); font-size:1rem; margin-bottom:12px; }
.spec-list ul{ display:flex; flex-direction:column; gap:8px; }
.spec-list li{
  color:var(--ink-soft);
  display:flex;
  gap:10px;
  align-items:flex-start;
}
.spec-list li svg{ flex:none; width:16px; height:16px; fill:var(--blue-500); margin-top:4px; }

.brand-chips{ display:flex; gap:10px; flex-wrap:wrap; margin:18px 0 24px; }
.brand-chips span{
  background:var(--blue-100);
  color:var(--blue-900);
  font-weight:700;
  font-size:.85rem;
  padding:8px 14px;
  border-radius:20px;
}

.service-sidebar .info-card{ margin-bottom:20px; }

/* Galeria */
.gallery-note{ font-size:.9rem; color:var(--ink-soft); margin-bottom:16px; font-style:italic; }
.gallery-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:12px;
}
@media (max-width: 600px){
  .gallery-grid{ grid-template-columns:repeat(2, 1fr); }
}
.gallery-grid button{
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:0;
  overflow:hidden;
  cursor:zoom-in;
  background:var(--blue-50);
  aspect-ratio:4/3;
  display:block;
}
.gallery-grid img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .2s ease; }
.gallery-grid button:hover img{ transform:scale(1.06); }

/* Lightbox */
.lightbox{
  position:fixed; inset:0;
  background:rgba(10,20,32,0.92);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:200;
  padding:30px;
}
.lightbox.open{ display:flex; }
.lightbox img{
  max-width:min(900px, 92vw);
  max-height:86vh;
  border-radius:var(--radius);
  box-shadow:0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-close{
  position:absolute;
  top:22px; right:26px;
  background:rgba(255,255,255,0.12);
  border:1px solid rgba(255,255,255,0.4);
  color:var(--white);
  width:42px; height:42px;
  border-radius:50%;
  font-size:1.4rem;
  line-height:1;
  cursor:pointer;
}
.lightbox-close:hover{ background:rgba(255,255,255,0.25); }

/* ---------- Footer ---------- */
.site-footer{
  background:var(--blue-900);
  color:var(--blue-100);
  padding:56px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:40px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,0.12);
}
@media (max-width: 760px){
  .footer-grid{ grid-template-columns:1fr; gap:30px; }
}
.footer-brand img{ height:46px; margin-bottom:14px; }
.footer-brand p{ color:var(--blue-100); font-size:.92rem; max-width:320px; }
.site-footer h4{ color:var(--white); font-size:1rem; margin-bottom:16px; }
.site-footer ul{ display:flex; flex-direction:column; gap:10px; }
.site-footer a{ color:var(--blue-100); font-size:.95rem; }
.site-footer a:hover{ color:var(--white); }
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-top:22px;
  flex-wrap:wrap;
  gap:12px;
  font-size:.85rem;
  color:rgba(232,242,250,0.7);
}
.footer-social{ display:flex; gap:14px; }
.footer-social svg{ width:18px; height:18px; fill:var(--blue-100); }
.footer-social a:hover svg{ fill:var(--white); }