/* ===== SIAire · Soluciones Integrales en Aire Acondicionado ===== */
:root {
  --marino: #0d2a45;      /* fondos oscuros */
  --marca: #195282;       /* azul del logo */
  --cian: #009bdb;        /* cian del logo */
  --cian-osc: #007fb5;
  --tinta: #13202e;       /* texto */
  --gris: #5a6878;        /* texto secundario */
  --linea: #dbe3ec;
  --fondo: #ffffff;
  --fondo-2: #f2f6fa;
  --ok: #1f8a4c;
  --error: #c0392b;
  --radio: 10px;
  --sombra: 0 10px 30px rgba(13, 42, 69, .10);
  --ancho: 1180px;
  --tit: "Barlow Condensed", "Arial Narrow", Arial, sans-serif;
  --txt: "Barlow", "Segoe UI", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--txt); font-size: 17px; line-height: 1.6; color: var(--tinta); background: var(--fondo); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--marca); }
h1, h2, h3 { font-family: var(--tit); line-height: 1.1; margin: 0 0 .5em; letter-spacing: .01em; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.9rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); font-weight: 700; color: var(--marino); }
h3 { font-size: 1.45rem; font-weight: 600; color: var(--marino); }
p { margin: 0 0 1em; }
.contenedor { width: min(var(--ancho), 100% - 32px); margin-inline: auto; }
.seccion { padding: clamp(56px, 8vw, 96px) 0; }
.seccion.gris { background: var(--fondo-2); }
.etiqueta { display: inline-block; font-family: var(--tit); font-weight: 600; font-size: .95rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cian-osc); margin-bottom: .6em; }
.oscuro .etiqueta { color: #6fd0ff; }
.intro { font-size: 1.12rem; color: var(--gris); max-width: 62ch; }
.centro { text-align: center; } .centro .intro { margin-inline: auto; }
.saltar { position: absolute; left: -999px; top: 8px; background: #fff; padding: 8px 14px; z-index: 100; }
.saltar:focus { left: 8px; }

/* ----- Botones ----- */
.btn { display: inline-flex; align-items: center; gap: .5em; font-family: var(--tit); font-weight: 600; font-size: 1.08rem; letter-spacing: .04em; text-transform: uppercase; text-decoration: none; padding: .8em 1.5em; border-radius: 6px; border: 2px solid transparent; cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .2s; }
.btn:hover { transform: translateY(-1px); }
.btn-primario { background: var(--cian); color: #fff; }
.btn-primario:hover { background: var(--cian-osc); }
.btn-borde { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-borde:hover { background: #fff; color: var(--marino); }
.btn-oscuro { background: var(--marino); color: #fff; }
.btn-oscuro:hover { background: var(--marca); }
.btn svg { width: 1.1em; height: 1.1em; }

/* ----- Encabezado ----- */
.barra-sup { background: var(--marino); color: #c9d6e3; font-size: .9rem; }
.barra-sup .contenedor { display: flex; justify-content: space-between; gap: 16px; padding: 7px 0; flex-wrap: wrap; }
.barra-sup a { color: #fff; text-decoration: none; }
.barra-sup span + span { margin-left: 18px; }
.encabezado { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97); backdrop-filter: blur(6px); border-bottom: 1px solid var(--linea); }
.encabezado .contenedor { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo img { height: 52px; width: auto; }
.menu { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.menu a { display: block; padding: 10px 14px; font-family: var(--tit); font-weight: 600; font-size: 1.1rem; letter-spacing: .03em; text-transform: uppercase; color: var(--marino); text-decoration: none; border-radius: 6px; }
.menu a:hover { color: var(--cian-osc); }
.menu a[aria-current="page"] { color: var(--cian-osc); box-shadow: inset 0 -3px 0 var(--cian); border-radius: 0; }
.menu .btn { margin-left: 10px; padding: .55em 1.2em; color: #fff; }
.menu .btn:hover { color: #fff; }
.boton-menu { display: none; background: none; border: 0; padding: 10px; cursor: pointer; color: var(--marino); }
.boton-menu svg { width: 28px; height: 28px; }

@media (max-width: 900px) {
  .barra-sup .ocultar-movil { display: none; }
  .boton-menu { display: block; }
  .menu { position: absolute; top: 76px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: #fff; border-bottom: 1px solid var(--linea); box-shadow: var(--sombra); padding: 8px 16px 16px; display: none; }
  .menu.abierto { display: flex; }
  .menu a { padding: 14px 6px; border-bottom: 1px solid var(--linea); }
  .menu a[aria-current="page"] { box-shadow: none; }
  .menu .btn { margin: 12px 0 0; justify-content: center; border-bottom: 0; }
  .logo img { height: 44px; }
}

/* ----- Portada ----- */
.portada { position: relative; background: var(--marino); color: #fff; overflow: hidden; }
.portada::before { content: ""; position: absolute; inset: 0; background: radial-gradient(1200px 500px at 85% 20%, rgba(0,155,219,.28), transparent 60%); }
.portada .contenedor { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; padding: clamp(48px, 8vw, 96px) 0; }
.portada h1 { color: #fff; }
.portada h1 em { font-style: normal; color: #6fd0ff; }
.portada p { font-size: 1.18rem; color: #d3e0ec; max-width: 54ch; }
.portada .acciones { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.portada .foto { position: relative; }
.portada .foto img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radio); box-shadow: 0 24px 60px rgba(0,0,0,.35); }
.portada .sello { position: absolute; left: -18px; bottom: -18px; background: var(--cian); color: #fff; border-radius: var(--radio); padding: 14px 20px; font-family: var(--tit); line-height: 1; box-shadow: var(--sombra); }
.portada .sello strong { display: block; font-size: 2.6rem; }
.portada .sello span { font-size: 1rem; letter-spacing: .06em; text-transform: uppercase; }
@media (max-width: 900px) {
  .portada .contenedor { grid-template-columns: 1fr; }
  .portada .sello { left: 12px; bottom: 12px; }
}

/* Portada interior (páginas) */
.cabecera { position: relative; color: #fff; background: var(--marino) center / cover no-repeat; }
.cabecera::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,42,69,.94) 0%, rgba(13,42,69,.75) 55%, rgba(13,42,69,.45) 100%); }
.cabecera .contenedor { position: relative; padding: clamp(56px, 9vw, 110px) 0; }
.cabecera h1 { color: #fff; max-width: 20ch; }
.cabecera p { color: #d3e0ec; font-size: 1.15rem; max-width: 58ch; margin: 0; }

/* ----- Cifras ----- */
.cifras { background: #fff; border-bottom: 1px solid var(--linea); }
.cifras .contenedor { display: grid; grid-template-columns: repeat(4, 1fr); }
.cifra { padding: 26px 18px; border-left: 1px solid var(--linea); }
.cifra:first-child { border-left: 0; }
.cifra strong { display: block; font-family: var(--tit); font-size: 1.9rem; color: var(--marca); line-height: 1.1; }
.cifra span { color: var(--gris); font-size: .98rem; }
@media (max-width: 800px) {
  .cifras .contenedor { grid-template-columns: 1fr 1fr; }
  .cifra:nth-child(3) { border-left: 0; }
  .cifra:nth-child(n+3) { border-top: 1px solid var(--linea); }
}

/* ----- Dos columnas ----- */
.dos-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.dos-col.invertido .media { order: 2; }
.media img { width: 100%; border-radius: var(--radio); object-fit: cover; box-shadow: var(--sombra); }
.media.par { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.media.par img { aspect-ratio: 3 / 4; }
.media.par img:last-child { margin-top: 40px; }
@media (max-width: 860px) {
  .dos-col { grid-template-columns: 1fr; }
  .dos-col.invertido .media { order: 0; }
}

.lista-check { list-style: none; padding: 0; margin: 0 0 1.2em; }
.lista-check li { position: relative; padding-left: 30px; margin-bottom: .45em; }
.lista-check li::before { content: ""; position: absolute; left: 0; top: .42em; width: 18px; height: 18px; border-radius: 50%; background: var(--cian) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center / 12px no-repeat; }

/* ----- Tarjetas de servicio ----- */
.rejilla { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin-top: 40px; }
.tarjeta { background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.tarjeta:hover { box-shadow: var(--sombra); transform: translateY(-3px); }
.tarjeta img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.tarjeta .cuerpo { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.tarjeta h3 { margin-bottom: .35em; }
.tarjeta p { color: var(--gris); font-size: 1rem; margin-bottom: 0; }
.tarjeta .icono { width: 46px; height: 46px; border-radius: 10px; background: #e3f4fc; color: var(--cian-osc); display: grid; place-items: center; margin-bottom: 14px; }
.tarjeta .icono svg { width: 26px; height: 26px; }
.tarjeta.sin-foto .cuerpo { padding-top: 26px; }
.rejilla.cinco { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.rejilla.cinco .tarjeta img { aspect-ratio: 4 / 3; }

/* ----- Marcas / clientes ----- */
.marcas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.marcas span { font-family: var(--tit); font-weight: 600; font-size: 1.15rem; letter-spacing: .06em; text-transform: uppercase; color: var(--marino); border: 1.5px solid var(--linea); background: #fff; border-radius: 6px; padding: .45em 1em; }
.clientes { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 48px; margin-top: 30px; }
.clientes span { font-family: var(--tit); font-weight: 700; font-size: clamp(1.4rem, 3vw, 2rem); letter-spacing: .08em; color: #8da0b3; }

/* ----- Proyectos ----- */
.proyecto { display: grid; grid-template-columns: 1.1fr 1fr; background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); overflow: hidden; }
.proyecto + .proyecto { margin-top: 28px; }
.proyecto img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
.proyecto .cuerpo { padding: clamp(24px, 4vw, 44px); align-self: center; }
.proyecto .cliente { font-family: var(--tit); font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--cian-osc); font-size: .95rem; }
.proyecto p { color: var(--gris); margin: 0; }
.proyecto:nth-child(even) img { order: 2; }
@media (max-width: 860px) {
  .proyecto { grid-template-columns: 1fr; }
  .proyecto:nth-child(even) img { order: 0; }
  .proyecto img { min-height: 0; aspect-ratio: 16 / 10; }
}
.mini-proyectos { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-top: 40px; }
.mini-proyectos a { position: relative; display: block; border-radius: var(--radio); overflow: hidden; color: #fff; text-decoration: none; aspect-ratio: 4 / 3; }
.mini-proyectos img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.mini-proyectos a:hover img { transform: scale(1.04); }
.mini-proyectos .pie { position: absolute; inset: auto 0 0 0; padding: 90px 20px 18px; background: linear-gradient(rgba(13,42,69,0), rgba(13,42,69,.75) 45%, rgba(13,42,69,.95)); }
.mini-proyectos .pie small { font-family: var(--tit); letter-spacing: .1em; text-transform: uppercase; color: #6fd0ff; }
.mini-proyectos .pie strong { display: block; font-family: var(--tit); font-size: 1.35rem; line-height: 1.15; }

/* ----- Banda de llamada ----- */
.banda { background: linear-gradient(110deg, var(--marca), var(--marino)); color: #fff; }
.banda .contenedor { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 48px 0; }
.banda h2 { color: #fff; margin: 0 0 .2em; }
.banda p { color: #d3e0ec; margin: 0; }

/* ----- Contacto ----- */
.contacto-grid { display: grid; grid-template-columns: 1fr 1.35fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 900px) { .contacto-grid { grid-template-columns: 1fr; } .contacto-grid .formulario { order: -1; } }
.datos { list-style: none; padding: 0; margin: 24px 0 0; }
.datos li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--linea); }
.datos svg { flex: 0 0 auto; width: 40px; height: 40px; padding: 9px; border-radius: 50%; background: #e3f4fc; color: var(--cian-osc); }
.datos small { display: block; color: var(--gris); font-size: .9rem; }
.datos a, .datos b { color: var(--marino); font-weight: 600; text-decoration: none; font-size: 1.08rem; }
.formulario { background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); padding: clamp(22px, 4vw, 40px); box-shadow: var(--sombra); }
.campos { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 18px; }
.campo { display: flex; flex-direction: column; gap: 6px; }
.campo.ancho { grid-column: 1 / -1; }
@media (max-width: 600px) { .campos { grid-template-columns: 1fr; } }
.campo label { font-weight: 600; font-size: .95rem; color: var(--marino); }
.campo label .req { color: var(--cian-osc); }
.campo input, .campo select, .campo textarea { font: inherit; font-size: 1rem; color: var(--tinta); background: #fbfdff; border: 1.5px solid var(--linea); border-radius: 8px; padding: 12px 14px; width: 100%; transition: border-color .15s, box-shadow .15s; }
.campo textarea { min-height: 140px; resize: vertical; }
.campo input:focus, .campo select:focus, .campo textarea:focus { outline: none; border-color: var(--cian); box-shadow: 0 0 0 3px rgba(0,155,219,.18); }
.campo [aria-invalid="true"] { border-color: var(--error); }
.trampa { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.acepto { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; color: var(--gris); margin: 18px 0; }
.acepto input { margin-top: 5px; width: 18px; height: 18px; accent-color: var(--cian); flex: 0 0 auto; }
.formulario .btn { width: 100%; justify-content: center; }
.formulario .btn[disabled] { opacity: .65; cursor: progress; transform: none; }
.aviso-form { display: none; margin-top: 16px; padding: 14px 16px; border-radius: 8px; font-weight: 500; }
.aviso-form.ok { display: block; background: #e7f6ee; color: var(--ok); border: 1px solid #b9e3c9; }
.aviso-form.error { display: block; background: #fbecea; color: var(--error); border: 1px solid #f1c4bf; }

/* ----- Texto legal ----- */
.legal { max-width: 78ch; }
.legal h2 { font-size: 1.6rem; margin-top: 1.6em; }
.legal li { margin-bottom: .4em; }

/* ----- Pie ----- */
.pie-sitio { background: var(--marino); color: #b8c7d6; font-size: .98rem; }
.pie-sitio .contenedor { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; padding: 56px 0 36px; }
.pie-sitio img { height: 58px; width: auto; margin-bottom: 14px; }
.pie-sitio h4 { font-family: var(--tit); font-size: 1.15rem; letter-spacing: .1em; text-transform: uppercase; color: #fff; margin: 0 0 12px; }
.pie-sitio ul { list-style: none; padding: 0; margin: 0; }
.pie-sitio li { margin-bottom: 8px; }
.pie-sitio a { color: #e3ecf4; text-decoration: none; }
.pie-sitio a:hover { color: #6fd0ff; }
.pie-sitio .legal-pie { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size: .88rem; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
@media (max-width: 800px) { .pie-sitio .contenedor { grid-template-columns: 1fr; gap: 24px; } }

/* ----- WhatsApp flotante ----- */
.whatsapp { position: fixed; right: 18px; bottom: 18px; z-index: 60; width: 58px; height: 58px; border-radius: 50%; background: #25d366; color: #fff; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(0,0,0,.25); transition: transform .2s; }
.whatsapp:hover { transform: scale(1.07); }
.whatsapp svg { width: 32px; height: 32px; }

/* ----- Animación sutil ----- */
@media (prefers-reduced-motion: no-preference) {
  .aparece { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
  .aparece.visible { opacity: 1; transform: none; }
}