/* ===== Tokens ===== */
:root {
  --naranja: #fe4918;
  --naranja-osc: #d93a0d;
  --amarillo: #ffc400;
  --concreto: #353535;
  --carbon: #222;
  --gris: #f2f2f2;
  --texto: #2b2b2b;
  --f-titulo: "Oswald", sans-serif;
  --f-texto: "PT Sans", sans-serif;
  --alto-header: 72px;
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--alto-header); }
body { font-family: var(--f-texto); font-size: 1.1rem; line-height: 1.6; color: var(--texto); background: #fff; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--f-titulo); line-height: 1.1; margin: 0 0 .6em; }
h1 { font-size: clamp(2.4rem, 7vw, 5rem); text-transform: uppercase; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); text-transform: uppercase; }
h3 { font-size: 1.3rem; }
:focus-visible { outline: 3px solid var(--amarillo); outline-offset: 2px; }

.contenedor { width: min(92%, 1140px); margin-inline: auto; }
.skip { position: absolute; left: -999px; background: var(--amarillo); color: #000; padding: .6rem 1rem; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; }

/* ===== Botones ===== */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .85rem 1.8rem; background: var(--naranja); color: #fff; font: 700 1rem var(--f-titulo); letter-spacing: .04em; text-transform: uppercase; text-decoration: none; border: 2px solid var(--naranja); cursor: pointer; transition: background .25s, color .25s; }
.btn:hover { background: var(--naranja-osc); border-color: var(--naranja-osc); }
.btn--borde { background: transparent; border-color: #fff; }
.btn--borde:hover { background: #fff; color: var(--concreto); border-color: #fff; }
.btn--pequeno { padding: .5rem 1.2rem; }

/* ===== Header ===== */
.header { position: sticky; top: 0; z-index: 50; height: var(--alto-header); background: var(--concreto); transition: box-shadow .3s; }
.header.con-sombra { box-shadow: 0 4px 18px rgba(0,0,0,.35); }
.header__fila { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo img { height: 44px; width: auto; }

.menu { position: absolute; top: var(--alto-header); left: 0; right: 0; background: var(--concreto); display: none; flex-direction: column; padding: 1rem 4%; gap: .25rem; }
.menu.abierto { display: flex; }
.menu a { color: #fff; text-decoration: none; font: 500 1.1rem var(--f-titulo); text-transform: uppercase; padding: .7rem 0; }
.menu a:not(.btn):hover { color: var(--naranja); }
.menu .btn { justify-content: center; margin-top: .5rem; }

.menu-btn { background: none; border: 0; padding: .5rem; cursor: pointer; display: grid; gap: 6px; }
.menu-btn span { width: 28px; height: 3px; background: #fff; transition: transform .3s, opacity .3s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { min-height: calc(100vh - var(--alto-header)); display: flex; align-items: center; color: #fff; background: linear-gradient(90deg, rgba(20,20,20,.88) 30%, rgba(20,20,20,.35)), url("../img/hero.jpg") center / cover no-repeat, var(--carbon); }
.hero__contenido { padding: 4rem 0; }
.hero h1 { max-width: 14ch; }
.hero p { max-width: 52ch; font-size: 1.25rem; }
.hero__botones { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }

/* Cinta de precaución: el elemento memorable */
.cinta { height: 22px; background: repeating-linear-gradient(-45deg, var(--amarillo) 0 24px, #111 24px 48px); }

/* ===== Secciones ===== */
.seccion { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.seccion--oscura { background: var(--concreto); color: #fff; }
.seccion--gris { background: var(--gris); }
.intro { max-width: 60ch; margin-bottom: 2.5rem; opacity: .9; }

/* Nosotros */
.nosotros { display: grid; gap: 3rem; align-items: center; }
.nosotros__imagen { position: relative; }
.nosotros__imagen img { width: 100%; border-bottom: 8px solid var(--naranja); }
.dato { position: absolute; left: 0; bottom: -1.5rem; background: var(--amarillo); color: #111; padding: 1rem 1.6rem; display: flex; align-items: baseline; gap: .8rem; }
.dato strong { font: 700 3.2rem var(--f-titulo); line-height: 1; }
.cita { font: 500 1.4rem var(--f-titulo); color: var(--naranja); border-left: 5px solid var(--naranja); padding-left: 1rem; }
.ventajas { display: grid; gap: .6rem; margin-top: 1.5rem; }
.ventajas i { color: var(--naranja); width: 1.6rem; }

/* Servicios */
.servicios { display: grid; gap: 1px; background: rgba(255,255,255,.15); margin-bottom: 2.5rem; border: 1px solid rgba(255,255,255,.15); }
.servicios li { background: var(--concreto); padding: 1.8rem; transition: background .25s; }
.servicios li:hover { background: #404040; }
.servicios i { font-size: 2rem; color: var(--amarillo); margin-bottom: 1rem; }
.servicios p { margin: 0; opacity: .85; }

.servicios a { display: inline-block; margin-top: 1rem; color: var(--amarillo); font: 700 1rem var(--f-titulo); text-transform: uppercase; text-decoration: none; }
.servicios a:hover { text-decoration: underline; }
.servicios .servicio--destacado { position: relative; background: linear-gradient(135deg, var(--naranja), #b92c05); }
.servicios .servicio--destacado:hover { background: linear-gradient(135deg, #ff5a2d, #c63207); }
.servicio--destacado i:first-of-type { color: #fff; }
.servicio--destacado p { opacity: 1; }
.servicio--destacado a { color: #fff; }
.etiqueta { display: inline-block; background: var(--amarillo); color: #111; font: 700 .8rem var(--f-titulo); letter-spacing: .08em; text-transform: uppercase; padding: .25rem .7rem; margin-bottom: 1rem; }

/* Implosiones */
.seccion--impl { background: #161616; color: #fff; }
.impl { display: grid; gap: 3rem; align-items: center; }
.impl__imagen { position: relative; background: var(--concreto) url("../img/hero.jpg") center / cover; }
.impl__imagen img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-bottom: 8px solid var(--amarillo); }
.etiqueta--grande { position: absolute; top: 1rem; left: 1rem; font-size: 1rem; padding: .4rem 1rem; margin: 0; }
.impl__texto h2 { color: #fff; }
.impl__texto h2::first-line { color: var(--amarillo); }
.impl__cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1px; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.14); margin: 1.8rem 0; }
.impl__cards li { background: #1f1f1f; padding: 1.2rem 1.3rem; }
.impl__cards i { color: var(--naranja); font-size: 1.5rem; margin-bottom: .5rem; }
.impl__cards h3 { margin-bottom: .3em; font-size: 1.15rem; }
.impl__cards p { margin: 0; font-size: 1rem; opacity: .85; }
.impl__usos { border-left: 5px solid var(--naranja); padding-left: 1rem; }
.impl__nota { font-size: .9rem; opacity: .65; margin-top: 1.5rem; }

/* Galería */
.galeria { display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem; }
.galeria button { display: block; width: 100%; padding: 0; border: 0; background: var(--carbon); cursor: zoom-in; overflow: hidden; aspect-ratio: 4 / 3; }
.galeria img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.galeria button:hover img { transform: scale(1.06); }

.galeria__vacia { text-align: center; color: #666; }

/* Carrusel */
[hidden] { display: none !important; }
.centrado { text-align: center; margin-top: 2rem; }
.carrusel { position: relative; }
.carrusel__pista { display: flex; gap: 1rem; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; scrollbar-width: none; overscroll-behavior-x: contain; }
.carrusel__pista::-webkit-scrollbar { display: none; }
.slide { flex: 0 0 82%; position: relative; scroll-snap-align: start; aspect-ratio: 4 / 3; padding: 0; border: 0; background: #111; overflow: hidden; cursor: zoom-in; }
.slide img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.slide:hover img { transform: scale(1.06); }
.slide::after { content: "\f002"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; right: .7rem; bottom: .7rem; width: 2.4rem; height: 2.4rem; display: grid; place-items: center; background: var(--amarillo); color: #111; opacity: 0; transform: translateY(6px); transition: .25s; }
.slide:hover::after, .slide:focus-visible::after { opacity: 1; transform: none; }
.car-btn { position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; display: grid; place-items: center; border: 0; background: rgba(34,34,34,.88); color: #fff; font-size: 1.2rem; cursor: pointer; transition: background .2s, opacity .2s; }
.car-btn:hover { background: var(--naranja); }
.car-btn:disabled { opacity: 0; pointer-events: none; }
.car-prev { left: .5rem; }
.car-sig { right: .5rem; }
.car-info { display: flex; align-items: center; gap: 1.2rem; margin-top: 1.2rem; }
.progreso { flex: 1; height: 4px; background: rgba(255,255,255,.2); }
.progreso span { display: block; height: 100%; width: 0; background: var(--naranja); transition: width .25s; }
.car-cont { margin: 0; font: 500 1rem var(--f-titulo); letter-spacing: .08em; white-space: nowrap; }
.seccion--oscura .galeria { margin-top: 2rem; }

/* Lightbox */
.lightbox { position: fixed; inset: 0; width: 100%; height: 100%; max-width: none; max-height: none; margin: 0; padding: 0; border: 0; background: rgba(10,10,10,.94); color: #fff; }
.lightbox[open] { display: flex; align-items: center; justify-content: center; }
.lightbox::backdrop { background: rgba(0,0,0,.9); }
.lightbox img { max-width: min(92vw, 1200px); max-height: 82vh; object-fit: contain; border-bottom: 4px solid var(--naranja); }
.lb-cerrar, .lb-nav { position: absolute; background: rgba(53,53,53,.85); color: #fff; border: 0; cursor: pointer; width: 48px; height: 48px; font-size: 1.6rem; display: grid; place-items: center; transition: background .2s; }
.lb-cerrar:hover, .lb-nav:hover { background: var(--naranja); }
.lb-cerrar { top: 1rem; right: 1rem; font-size: 2rem; }
.lb-nav { top: 50%; transform: translateY(-50%); }
.lb-prev { left: 1rem; }
.lb-sig { right: 1rem; }
.lb-cont { position: absolute; bottom: 1rem; left: 0; right: 0; text-align: center; margin: 0; font: 500 1rem var(--f-titulo); letter-spacing: .08em; }

/* Proceso */
.pasos { display: grid; gap: 1.5rem; counter-reset: paso; }
.pasos li { counter-increment: paso; position: relative; background: #fff; padding: 2rem 1.5rem 1.5rem; border-top: 5px solid var(--amarillo); }
.pasos li::before { content: counter(paso); position: absolute; top: -1.4rem; left: 1.2rem; width: 2.6rem; height: 2.6rem; display: grid; place-items: center; background: var(--concreto); color: var(--amarillo); font: 700 1.4rem var(--f-titulo); }
.pasos p { margin: 0; }

/* FAQ */
.faq { max-width: 800px; }
.faq details { border-bottom: 1px solid #ddd; }
.faq summary { cursor: pointer; padding: 1.1rem 2rem 1.1rem 0; font: 500 1.2rem var(--f-titulo); position: relative; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: .8rem; font-size: 1.8rem; color: var(--naranja); transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 1.2rem; }

/* Opiniones */
.opiniones { display: grid; gap: 1.5rem; }
blockquote { margin: 0; background: #fff; padding: 2rem; border-top: 5px solid var(--naranja); }
blockquote p { margin: 0 0 1rem; }
cite { font-style: normal; font-weight: 700; }
cite span { display: block; font-weight: 400; color: #666; font-size: .95rem; }

/* Contacto */
.contacto { display: grid; gap: 3rem; }
.datos { display: grid; gap: .8rem; margin-top: 1.5rem; }
.datos i { color: var(--naranja); width: 1.6rem; }
.datos a { text-decoration: none; font-weight: 700; }
.formulario { background: #fff; padding: 2rem; display: grid; gap: 1rem; }
.formulario label { display: grid; gap: .3rem; font-weight: 700; font-size: 1rem; }
.formulario input:not([type="checkbox"]), .formulario select, .formulario textarea { width: 100%; padding: .75rem; font: inherit; border: 1px solid #bbb; background: #fff; }
.formulario input:focus, .formulario select:focus, .formulario textarea:focus { border-color: var(--naranja); outline: 2px solid var(--naranja); }
.formulario .check { display: flex; gap: .6rem; font-weight: 400; font-size: .95rem; align-items: flex-start; }
.estado { margin: 0; font-weight: 700; }
.estado.ok { color: #1b7a3b; }
.estado.error { color: #b3261e; }

/* Footer */
.footer { background: var(--carbon); color: #ddd; padding: 3rem 0 2rem; font-size: .95rem; }
.footer__fila { display: grid; gap: 1rem; justify-items: start; }
.footer p { margin: 0; }

/* Redes sociales */
.siguenos { margin-top: 2rem; }
.siguenos h3 { margin-bottom: .8rem; }
.redes { display: flex; flex-wrap: wrap; gap: .7rem; }
.redes a { display: grid; place-items: center; width: 48px; height: 48px; border: 2px solid currentColor; color: inherit; font-size: 1.3rem; text-decoration: none; transition: transform .25s, background .25s, border-color .25s, color .25s; }
.redes a:hover, .redes a:focus-visible { transform: translateY(-4px); color: #fff; border-color: transparent; }
.redes .fb:hover { background: #1877f2; }
.redes .ig:hover { background: linear-gradient(45deg, #f9ce34, #ee2a7b 55%, #6228d7); }
.redes .xx:hover { background: #000; border-color: #fff; }
.redes .wa:hover { background: #25d366; }
.footer .footer__copy { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.12); font-size: .9rem; opacity: .7; }

/* WhatsApp flotante */
.whatsapp { position: fixed; right: 1.2rem; bottom: 1.2rem; z-index: 60; width: 58px; height: 58px; border-radius: 50%; background: #25d366; color: #fff; display: grid; place-items: center; font-size: 2rem; text-decoration: none; box-shadow: 0 4px 14px rgba(0,0,0,.35); }

/* Revelado al hacer scroll (solo si hay JS) */
.js .revelar { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.js .revelar.visible { opacity: 1; transform: none; }

/* ===== Tablet / Desktop ===== */
@media (min-width: 640px) {
  .slide { flex-basis: calc((100% - 1rem) / 2); }
  .servicios { grid-template-columns: repeat(2, 1fr); }
  .opiniones { grid-template-columns: repeat(2, 1fr); }
  .galeria { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 900px) {
  .slide { flex-basis: calc((100% - 2rem) / 3); }
  .menu a { font-size: 1rem; }
  .menu-btn { display: none; }
  .menu { position: static; display: flex; flex-direction: row; align-items: center; background: none; padding: 0; gap: 1.3rem; }
  .menu .btn { margin: 0; }
  .nosotros, .contacto { grid-template-columns: 1fr 1fr; gap: 4rem; }
  .servicios { grid-template-columns: repeat(3, 1fr); }
  .pasos { grid-template-columns: repeat(4, 1fr); }
  .servicios .servicio--destacado { grid-column: span 2; }
  .impl { grid-template-columns: 1fr 1.1fr; gap: 4rem; }
  .footer__fila { grid-template-columns: auto 1fr auto; align-items: center; justify-items: start; gap: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js .revelar { opacity: 1; transform: none; }
}