/* ==========================================================================
   Alero Construcciones — hoja de estilos
   Paleta derivada del logo (tinta carbón) y de las obras (madera, bosque, crema)
   ========================================================================== */

:root {
  --crema: #F6F1E7;
  --crema-2: #EDE5D5;
  --carbon: #1B1C1A;
  --tinta: #2A2622;
  --tinta-suave: #57504a;
  --madera: #B07840;
  --madera-oscura: #7C4F24;
  --verde: #33503E;
  --verde-oscuro: #263B2E;
  --blanco: #FFFDF9;
  --linea: rgba(42, 38, 34, 0.14);
  --whatsapp: #1E6B45;
  --sombra: 0 10px 30px rgba(27, 28, 26, 0.10);
  --radio: 10px;
  --fuente-cuerpo: "Inter", system-ui, -apple-system, sans-serif;
  --fuente-titulo: "Fraunces", Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  font-family: var(--fuente-cuerpo);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--tinta);
  background: var(--crema);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3 { font-family: var(--fuente-titulo); line-height: 1.12; margin: 0 0 0.5em; color: var(--carbon); font-weight: 600; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.9rem, 4vw, 2.75rem); }
h3 { font-size: 1.22rem; font-weight: 600; }
p { margin: 0 0 1em; }

a { color: var(--verde); text-underline-offset: 3px; }
a:hover { color: var(--verde-oscuro); }

:focus-visible {
  outline: 3px solid var(--madera);
  outline-offset: 2px;
  border-radius: 3px;
}

.contenedor { width: min(1160px, 92vw); margin-inline: auto; }
.oculto { display: none !important; }

.salto-contenido {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  background: var(--carbon); color: var(--crema); padding: 10px 18px; border-radius: 6px;
}
.salto-contenido:focus { left: 8px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 22px; border-radius: 8px; border: 2px solid transparent;
  font-weight: 600; font-size: 0.98rem; text-decoration: none; cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}
.btn--grande { padding: 15px 28px; font-size: 1.05rem; }
.btn--whatsapp { background: var(--whatsapp); color: #fff; }
.btn--whatsapp:hover { background: #17573a; color: #fff; transform: translateY(-2px); box-shadow: var(--sombra); }
.btn--fantasma { border-color: rgba(246, 241, 231, 0.75); color: var(--crema); background: rgba(27, 28, 26, 0.25); backdrop-filter: blur(3px); }
.btn--fantasma:hover { background: rgba(246, 241, 231, 0.16); color: #fff; transform: translateY(-2px); }
.btn--instagram {
  color: #fff;
  background: linear-gradient(45deg, #f9ce34 0%, #ee2a7b 50%, #6228d7 100%);
}
.btn--instagram:hover { color: #fff; filter: brightness(1.08); transform: translateY(-2px); box-shadow: var(--sombra); }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(246, 241, 231, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.header.con-sombra { border-bottom-color: var(--linea); box-shadow: 0 4px 24px rgba(27, 28, 26, 0.08); }
.header__inner { display: flex; align-items: center; gap: 28px; padding: 10px 0; }
.header__logo img { height: 56px; width: auto; }
.nav { margin-left: auto; }
.nav__lista { display: flex; gap: 26px; list-style: none; margin: 0; padding: 0; }
.nav__lista a {
  color: var(--tinta); text-decoration: none; font-weight: 500; font-size: 0.98rem;
  padding: 6px 2px; border-bottom: 2px solid transparent;
}
.nav__lista a:hover { color: var(--madera-oscura); border-bottom-color: var(--madera); }
.header__cta { white-space: nowrap; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; padding: 9px;
  background: none; border: 1px solid var(--linea); border-radius: 8px; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--carbon); border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: min(88vh, 780px); display: flex; align-items: flex-end; isolation: isolate; }
.hero__media, .hero__media img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__media img { object-fit: cover; object-position: 65% 40%; }
.hero__velo {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(to top, rgba(20, 21, 19, 0.82) 0%, rgba(20, 21, 19, 0.35) 45%, rgba(20, 21, 19, 0.18) 100%),
    linear-gradient(105deg, rgba(20, 21, 19, 0.55) 0%, transparent 55%);
}
.hero__contenido { position: relative; z-index: 2; padding: 130px 0 72px; color: var(--crema); }
.hero__contenido h1 { color: #fff; margin-bottom: 0.35em; text-wrap: balance; }
.hero__contenido h1 em { font-style: italic; color: #E8C89B; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(246, 241, 231, 0.4); border-radius: 999px;
  padding: 7px 16px; font-size: 0.88rem; font-weight: 500; letter-spacing: 0.02em;
  background: rgba(27, 28, 26, 0.35); backdrop-filter: blur(4px); margin-bottom: 22px;
}
.hero__bajada { max-width: 560px; font-size: 1.15rem; color: rgba(246, 241, 231, 0.94); }
.hero__acciones { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* ---------- Barra de confianza ---------- */
.confianza { background: var(--verde-oscuro); color: var(--crema); padding: 34px 0; }
.confianza__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.confianza__item strong { display: block; font-family: var(--fuente-titulo); font-size: 1.6rem; color: #fff; }
.confianza__item span { font-size: 0.92rem; color: rgba(246, 241, 231, 0.85); }

/* ---------- Secciones ---------- */
.seccion { padding: 90px 0; }
.seccion--alterna { background: var(--crema-2); }
.seccion__encabezado { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.seccion__encabezado--izq { margin: 0 0 28px; text-align: left; }
.seccion__bajada { color: var(--tinta-suave); font-size: 1.08rem; }
.seccion__bajada--secundaria { font-size: 0.95rem; margin-top: -0.6em; }
.kicker {
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--madera-oscura); margin-bottom: 10px;
}
.kicker--claro { color: #D8B181; }

/* ---------- Servicios ---------- */
.servicios__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; align-items: stretch; }
.servicio {
  display: flex; flex-direction: column;
  background: var(--blanco); border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 28px 24px 22px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.servicio:hover { transform: translateY(-5px); box-shadow: var(--sombra); border-color: rgba(176, 120, 64, 0.45); }
.servicio__icono { display: inline-flex; width: 46px; height: 46px; color: var(--madera-oscura); margin-bottom: 14px; }
.servicio__icono svg { width: 100%; height: 100%; }
.servicio h3 { margin-bottom: 0.6em; }
.servicio p { margin: 0; font-size: 0.95rem; color: var(--tinta-suave); }
.servicio ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.servicio li {
  position: relative; padding-left: 18px;
  font-size: 0.95rem; line-height: 1.45; color: var(--tinta-suave);
}
.servicio li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--madera);
}

/* ---------- Galería / proyectos ---------- */
.filtros { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 36px; }
.filtro {
  border: 1.5px solid var(--linea); background: transparent; color: var(--tinta);
  border-radius: 999px; padding: 9px 20px; font-family: inherit; font-size: 0.93rem; font-weight: 500;
  cursor: pointer; transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.filtro:hover { border-color: var(--madera); color: var(--madera-oscura); }
.filtro.activo { background: var(--carbon); border-color: var(--carbon); color: var(--crema); }

.galeria { columns: 3; column-gap: 20px; }
.obra { break-inside: avoid; margin: 0 0 20px; }
.obra.filtrada { display: none; }
.obra__zoom {
  display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in;
  border-radius: var(--radio); overflow: hidden; position: relative;
}
.obra__zoom img {
  width: 100%; border-radius: var(--radio);
  transition: transform 0.35s ease;
}
.obra__zoom:hover img { transform: scale(1.035); }
.obra figcaption { padding: 10px 4px 0; font-size: 0.9rem; color: var(--tinta-suave); }
.obra figcaption strong { display: block; color: var(--carbon); font-weight: 600; font-size: 0.97rem; }

/* ---------- Proceso ---------- */
.proceso__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px;
  list-style: none; margin: 0; padding: 0; counter-reset: paso;
}
.paso { position: relative; padding-top: 8px; }
.paso__numero {
  display: inline-flex; align-items: center; justify-content: center;
  width: 54px; height: 54px; border-radius: 50%;
  background: var(--crema-2); border: 1.5px solid var(--madera);
  font-family: var(--fuente-titulo); font-size: 1.5rem; font-weight: 700; color: var(--madera-oscura);
  margin-bottom: 16px;
}
.paso h3 { margin-bottom: 0.3em; }
.paso p { margin: 0; font-size: 0.95rem; color: var(--tinta-suave); }

/* ---------- Diferenciadores ---------- */
.diferenciales { background: var(--carbon); color: rgba(246, 241, 231, 0.92); }
.diferenciales h2 { color: var(--crema); }
.diferenciales__grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.diferenciales__intro { color: rgba(246, 241, 231, 0.85); margin-bottom: 24px; }
.diferenciales__promesa { border-left: 3px solid #E8C89B; padding-left: 20px; margin: 0 0 32px; }
.diferenciales__promesa p { margin: 0; font-style: italic; color: var(--crema); }
.diferenciales__promesa strong { font-style: normal; color: #E8C89B; }
.diferencial { border-left: 3px solid var(--madera); padding-left: 20px; margin-bottom: 28px; }
.diferencial h3 { color: #E8C89B; margin-bottom: 0.3em; }
.diferencial p { margin: 0; color: rgba(246, 241, 231, 0.8); }
.diferenciales__foto { margin: 0; }
.diferenciales__foto img { border-radius: var(--radio); box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4); }
.diferenciales__foto figcaption { margin-top: 12px; font-size: 0.88rem; color: rgba(246, 241, 231, 0.6); font-style: italic; }

/* ---------- Proyecto estrella ---------- */
.estrella__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.estrella__foto { margin: 0; }
.estrella__foto img { border-radius: var(--radio); box-shadow: var(--sombra); }
.estrella__specs { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; padding: 0; margin: 0 0 26px; }
.estrella__specs li { position: relative; padding-left: 26px; font-weight: 500; }
.estrella__specs li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px;
  border: 2px solid var(--madera); border-radius: 3px; background: rgba(176, 120, 64, 0.18);
}

/* ---------- Testimonios ---------- */
.testimonios__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.testimonio {
  margin: 0; padding: 26px 24px;
  background: var(--blanco); border: 1px solid var(--linea); border-radius: var(--radio);
  font-size: 0.97rem; color: var(--tinta-suave);
}
.testimonio footer { margin-top: 14px; font-weight: 600; color: var(--carbon); }
.testimonio__etiqueta {
  display: inline-block; margin-bottom: 14px;
  padding: 5px 14px; border-radius: 999px;
  background: rgba(176, 120, 64, 0.14); color: var(--madera-oscura);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.02em;
}

/* ---------- Contacto ---------- */
.contacto { background: var(--verde-oscuro); color: rgba(246, 241, 231, 0.92); }
.contacto h2 { color: var(--crema); }
.contacto .seccion__bajada { color: rgba(246, 241, 231, 0.8); }
.contacto__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.contacto__info { display: flex; flex-direction: column; gap: 8px; }
.contacto__linea {
  display: flex; gap: 16px; align-items: flex-start;
  color: var(--crema); text-decoration: none; padding: 14px 16px; border-radius: 8px; margin: 0;
  transition: background-color 0.18s ease;
}
.contacto__linea:hover { background: rgba(246, 241, 231, 0.08); color: #fff; }
.contacto__linea svg { flex-shrink: 0; margin-top: 3px; color: #D8B181; }
.contacto__linea strong { display: block; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: #D8B181; margin-bottom: 2px; }
.contacto__linea--estatica:hover { background: none; }

.formulario {
  background: var(--crema); color: var(--tinta);
  border-radius: var(--radio); padding: 32px 28px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
}
.formulario label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 16px; color: var(--carbon); }
.formulario input, .formulario textarea {
  width: 100%; margin-top: 6px; padding: 12px 14px;
  border: 1.5px solid var(--linea); border-radius: 8px; background: var(--blanco);
  font: inherit; color: var(--tinta);
}
.formulario input:focus, .formulario textarea:focus { outline: 3px solid rgba(176, 120, 64, 0.5); outline-offset: 0; border-color: var(--madera); }
.formulario textarea { resize: vertical; }
.formulario__fila { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.campo-telefono {
  display: flex; align-items: stretch; margin-top: 6px;
  border: 1.5px solid var(--linea); border-radius: 8px; background: var(--blanco);
  overflow: hidden;
}
.campo-telefono:focus-within { outline: 3px solid rgba(176, 120, 64, 0.5); border-color: var(--madera); }
.campo-telefono__prefijo {
  display: flex; align-items: center; gap: 7px; flex-shrink: 0;
  padding: 0 12px; background: var(--crema-2); color: var(--tinta);
  font-weight: 600; border-right: 1.5px solid var(--linea);
}
.campo-telefono input { flex: 1; min-width: 0; margin-top: 0; border: 0; border-radius: 0; }
.campo-telefono input:focus { outline: none; }
.formulario .btn { width: 100%; justify-content: center; margin-top: 4px; }
.formulario__nota { margin: 14px 0 0; font-size: 0.88rem; color: var(--tinta-suave); }

/* ---------- Footer ---------- */
.footer { background: var(--carbon); color: rgba(246, 241, 231, 0.75); padding: 60px 0 0; }
.footer a { color: rgba(246, 241, 231, 0.85); text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 44px; }
.footer__marca img { height: 74px; width: auto; margin-bottom: 14px; }
.footer__marca p { font-size: 0.93rem; }
.footer__col h3 { color: var(--crema); font-size: 1.02rem; margin-bottom: 14px; }
.footer__col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; font-size: 0.95rem; }
.footer__legal { border-top: 1px solid rgba(246, 241, 231, 0.14); padding-block: 18px; font-size: 0.85rem; }
.footer__legal p { margin: 0; }

/* ---------- WhatsApp flotante ---------- */
.whatsapp-flotante {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  display: inline-flex; align-items: center; justify-content: center;
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--whatsapp); color: #fff;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.3);
  transition: transform 0.18s ease, background-color 0.18s ease;
}
.whatsapp-flotante:hover { transform: scale(1.08); background: #17573a; color: #fff; }

/* ---------- Visor (lightbox) ---------- */
.visor {
  border: 0; padding: 0; background: transparent;
  max-width: min(1100px, 94vw); max-height: 92vh;
}
.visor::backdrop { background: rgba(15, 16, 14, 0.88); }
.visor img { max-width: 100%; max-height: 78vh; width: auto; height: auto; margin-inline: auto; border-radius: 8px; }
.visor p { color: var(--crema); text-align: center; font-family: var(--fuente-cuerpo); font-size: 0.95rem; margin: 14px 0 0; }
.visor__cerrar {
  position: absolute; top: -4px; right: 2px; z-index: 2;
  width: 44px; height: 44px; border: 0; border-radius: 50%;
  background: rgba(246, 241, 231, 0.15); color: var(--crema);
  font-size: 26px; line-height: 1; cursor: pointer;
}
.visor__cerrar:hover { background: rgba(246, 241, 231, 0.3); }

/* ---------- Animación de aparición ---------- */
.revelar { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.revelar.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .revelar { opacity: 1; transform: none; transition: none; }
  .btn, .servicio, .obra__zoom img, .whatsapp-flotante { transition: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .galeria { columns: 2; }
  .diferenciales__grid, .estrella__grid, .contacto__grid { gap: 40px; }
}

@media (max-width: 880px) {
  .seccion { padding: 64px 0; }

  .header__cta { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; margin: 0;
    background: var(--crema); border-bottom: 1px solid var(--linea);
    box-shadow: 0 18px 30px rgba(27, 28, 26, 0.12);
    display: none;
  }
  .nav.abierto { display: block; }
  .nav__lista { flex-direction: column; gap: 0; padding: 10px 4vw 16px; }
  .nav__lista a { display: block; padding: 13px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--linea); }

  .confianza__grid { grid-template-columns: 1fr; gap: 20px; }
  .proceso__grid { grid-template-columns: repeat(2, 1fr); }
  .diferenciales__grid, .estrella__grid, .contacto__grid { grid-template-columns: 1fr; }
  .estrella__grid .estrella__foto { order: -1; }
  .testimonios__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 1rem; }
  .hero { min-height: 92svh; }
  .hero__contenido { padding: 110px 0 90px; }
  .hero__bajada { font-size: 1.05rem; }
  .hero__acciones .btn { width: 100%; justify-content: center; }
  .galeria { columns: 1; }
  .proceso__grid { grid-template-columns: 1fr; }
  .formulario__fila { grid-template-columns: 1fr; }
  .estrella__specs { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .whatsapp-flotante { right: 14px; bottom: 14px; }
}