/* =============================================================
   GRUPO DISEÑO — style.css
   ============================================================= */

/* --- 1. Reset mínimo --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }

/* --- 2. Custom properties --- */
:root {
  /* Paleta */
  --c-negro:      #1A1A1A;
  --c-gris:       #6F6F6F;
  --c-gris-claro: #E8E8E8;
  --c-naranja:    #F2A044;
  --c-azul:       #3F5159;
  --c-blanco:     #FFFFFF;

  /* Tipografía */
  --font-base: "Century Gothic", "URW Gothic", "Questrial", "Avant Garde", system-ui, sans-serif;
  --fs-body:   clamp(15px, 0.6vw + 12px, 17px);
  --fs-small:  clamp(13px, 0.4vw + 11px, 15px);
  --fs-h2:     clamp(19px, 1.2vw + 14px, 26px);
  --fs-hero:   clamp(24px, 2.5vw + 16px, 44px);

  /* Interlineado */
  --lh-normal:  1.65;
  --lh-portada: 1.9;

  /* Espaciado */
  --sp-xs: 0.75rem;
  --sp-s:  1.5rem;
  --sp-m:  3rem;
  --sp-l:  6rem;
  --sp-xl: 9rem;

  /* Header */
  --header-h: 96px;
}

/* --- 2b. Intro / Splash --- */
.intro-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-overlay.is-hiding {
  animation: introExit 0.65s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

@keyframes introExit {
  to { transform: translateY(-100%); }
}

.intro-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.intro-logo {
  width: clamp(140px, 22vw, 220px);
  opacity: 0;
  animation: introLogoIn 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}

@keyframes introLogoIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.intro-bar {
  height: 2px;
  width: 0;
  background: var(--c-naranja);
  animation: introBarIn 0.5s ease 0.65s forwards;
}

@keyframes introBarIn {
  to { width: clamp(140px, 22vw, 220px); }
}

@media (prefers-reduced-motion: reduce) {
  .intro-logo { animation: none; opacity: 1; }
  .intro-bar  { animation: none; width: clamp(140px, 22vw, 220px); }
}

/* --- 3. Tipografía base --- */
html {
  font-family: var(--font-base);
  font-size: var(--fs-body);
  font-weight: 400;
  color: var(--c-negro);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  line-height: 1.2;
}

h2 { font-size: var(--fs-h2); }

p { font-size: inherit; }

a {
  color: inherit;
  text-decoration: none;
}

a:hover { color: var(--c-naranja); }

/* --- 4. Layout helpers --- */
.container {
  width: 90%;
  max-width: 1100px;
  margin-inline: auto;
}

body {
  padding-top: var(--header-h); /* compensa el header fijo */
}

/* La portada ya maneja su propio padding-top, así que la excluimos */
#portada { margin-top: calc(var(--header-h) * -1); }

.section {
  padding-block: var(--sp-l);
  scroll-margin-top: var(--header-h);
}

/* --- 5. Header / nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--c-blanco);
  border-bottom: 1px solid var(--c-gris-claro);
  height: var(--header-h);
  transition: background 0.35s, border-color 0.35s;
}

.site-header.is-transparent {
  background: transparent;
  border-bottom-color: transparent;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo { display: inline-flex; align-items: center; }

.logo-img {
  height: 95px;
  width: auto;
  display: block;
}

.logo-img--footer {
  height: 58px;
}


.nav-menu {
  display: flex;
  gap: var(--sp-s);
  align-items: center;
}

.nav-menu a {
  font-size: var(--fs-small);
  color: var(--c-gris);
  letter-spacing: 0.04em;
  padding: 0.28em 0.6em;
  transition: color 0.2s, background 0.2s;
}

.nav-menu a:hover { color: var(--c-naranja); }

.nav-menu a.nav-primary {
  color: #606060;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.nav-menu a.is-active {
  background: var(--c-naranja);
  color: var(--c-blanco);
}

.nav-menu a.is-active:hover { color: var(--c-blanco); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--c-negro);
  transition: transform 0.2s, opacity 0.2s;
}

/* --- 6. Secciones específicas --- */

/* PORTADA */
.section--portada {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100svh;
  padding-top: var(--header-h);
  background: var(--c-blanco);
}

.portada-imagen {
  position: relative;
  overflow: hidden;
}

.portada-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.portada-texto {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: var(--sp-s);
  padding: clamp(2rem, 6vw, 5rem);
  background: var(--c-blanco);
  position: relative;
}

.portada-social {
  position: absolute;
  bottom: clamp(1.5rem, 4vw, 3rem);
  right: clamp(1.5rem, 4vw, 3rem);
  display: flex;
  gap: 0.5rem;
}

.portada-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #AAAAAA;
  color: var(--c-blanco);
  transition: background 0.2s;
}

.portada-social-btn:hover {
  background: var(--c-naranja);
  color: var(--c-blanco);
}

.portada-social-btn svg {
  width: 16px;
  height: 16px;
  display: block;
}

.portada-intro {
  font-size: clamp(26px, 2.2vw + 16px, 38px);
  color: #B0B0B0;
  font-weight: 30;
  line-height: 1.5;
}


.portada-headline {
  font-size: clamp(28px, 3.2vw + 16px, 52px);
  line-height: 1.25;
  color: #5A5A5A;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.portada-conector {
  font-size: 0.85em;
  font-weight: 400;
  color: #B0B0B0;
  vertical-align: middle;
}

.portada-outro {
  font-size: clamp(26px, 2.2vw + 16px, 36px);
  color: #B0B0B0;
  font-weight: 400;
}

.portada-scroll {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(0,0,0,0.25);
  color: rgba(0,0,0,0.45);
  font-size: 1.1rem;
  margin-top: var(--sp-s);
  transition: border-color 0.2s, color 0.2s;
}

.portada-scroll:hover {
  border-color: var(--c-naranja);
  color: var(--c-naranja);
}

/* FILOSOFÍA */
.section--filosofia {
  background: var(--c-negro);
  border-top: 3px solid var(--c-naranja);
  padding: 0;
}

.filosofia-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  width: 100%;
}

.filosofia-bloque {
  padding: var(--sp-l) clamp(2rem, 5vw, 6rem);
  display: flex;
  align-items: center;
}

.filosofia-bloque p {
  font-size: clamp(15px, 0.8vw + 12px, 18px);
  line-height: 1.85;
  color: #fff;
}

.filosofia-bloque:first-child {
  padding-left: clamp(30rem, 22vw, 50rem);
  padding-right: 0;
}

.filosofia-bloque:first-child p {
  max-width: 22ch;
  margin-bottom: 2rem;
}

.filosofia-bloque--highlight {
  background: var(--c-gris-claro);
  gap: var(--sp-s);
  align-items: flex-start;
}

.filosofia-bloque--highlight p {
  color: var(--c-negro);
  font-size: clamp(15px, 0.8vw + 12px, 18px);
  line-height: 1.85;
  max-width: 38ch;
}

.filosofia-highlight-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--c-naranja);
  margin-top: 6px;
}

/* QUIÉNES SOMOS */
.section--quienes-somos {
  background: var(--c-gris-claro);
}

.section--quienes-somos .container {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 0 var(--sp-l);
  align-items: start;
}

.section-title {
  font-size: var(--fs-h2);
  color: var(--c-negro);
  margin-bottom: var(--sp-m);
  letter-spacing: 0.04em;
}

.section--servicio .section-title {
  margin-bottom: 0;
  padding-top: 0.1em;
}

.section-title--azul {
  color: var(--c-azul);
}

.quienes-content p {
  color: var(--c-negro);
  margin-bottom: var(--sp-s);
  max-width: 62ch;
}

.firma {
  margin-top: var(--sp-m);
  padding-top: var(--sp-s);
  border-top: 1px solid rgba(0,0,0,0.12);
  color: var(--c-gris);
  font-size: var(--fs-small);
}

.firma-nombre {
  display: block;
  font-size: var(--fs-body);
  color: var(--c-negro);
  margin-top: 0.3em;
  letter-spacing: 0.03em;
}

/* SERVICIOS */
.section--servicio .container {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 0 var(--sp-l);
  align-items: start;
}

.section--servicio .servicio-content p {
  margin-bottom: var(--sp-s);
  color: var(--c-negro);
  max-width: 62ch;
}

.section--alt {
  background: var(--c-gris-claro);
}

.destacado {
  color: var(--c-azul);
  font-size: var(--fs-body);
  letter-spacing: 0.01em;
}

.destacado--grande {
  font-size: clamp(16px, 1vw + 13px, 20px);
  color: var(--c-naranja);
  letter-spacing: 0.04em;
  margin-top: var(--sp-m);
}

.etapas {
  color: var(--c-azul);
  border-left: 2px solid var(--c-azul);
  padding-left: var(--sp-s);
  margin-block: var(--sp-s);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
}

.tags {
  color: var(--c-gris);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
}

.asesoramiento {
  color: var(--c-gris);
  font-size: var(--fs-small);
  border-top: 1px solid rgba(63,81,89,0.2);
  padding-top: var(--sp-s);
  margin-top: var(--sp-s);
  max-width: 62ch;
}

/* GALERÍA */
.section--galeria { background: var(--c-blanco); }

.galeria-title-line {
  height: 2px;
  width: 100%;
  background: var(--c-naranja);
  margin-bottom: var(--sp-m);
}

.section--galeria .section-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  color: rgba(0,0,0,0.16);
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 0.3em;
}

.galeria-nota {
  color: var(--c-gris);
  font-size: var(--fs-body);
  margin-bottom: var(--sp-xs);
  max-width: 70ch;
  line-height: var(--lh-normal);
}

.galeria-disclaimer {
  margin-top: 0;
  margin-bottom: var(--sp-m);
  font-size: 13px;
  color: rgba(111,111,111,0.55);
  max-width: 100%;
  line-height: 1.6;
}

.galeria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-s);
}

.proyecto-card {
  cursor: pointer;
  overflow: hidden;
  border: 1px solid var(--c-gris-claro);
  transition: border-color 0.2s;
}

.proyecto-card:hover,
.proyecto-card:focus {
  border-color: var(--c-naranja);
  outline: none;
}

.proyecto-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: cover;
}

/* Placeholders cromáticos diferenciados por proyecto */
.proyecto-thumb--1 { background: #D9CDBF; }
.proyecto-thumb--2 { background: #BFC9CE; }
.proyecto-thumb--3 { background: #C8C2B5; }
.proyecto-thumb--4 { background: #C4CACE; }
.proyecto-thumb--5 { background: #D6CABC; }
.proyecto-thumb--6  { background: #BEC8CE; }
.proyecto-thumb--7  { background: #C9BFB5; }
.proyecto-thumb--8  { background: #C2C8C0; }
.proyecto-thumb--9  { background: #CABFC9; }
.proyecto-thumb--10 { background: #B8C4C8; }

/* Tarjetas ocultas (Ver más) */
.proyecto-card--oculta {
  display: none;
}

@keyframes galeriaFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.galeria-grid.is-expanded .proyecto-card--oculta {
  display: block;
  animation: galeriaFadeIn 0.35s ease both;
}

/* Stagger de entrada */
.galeria-grid.is-expanded .proyecto-card--oculta:nth-child(7)  { animation-delay: 0s; }
.galeria-grid.is-expanded .proyecto-card--oculta:nth-child(8)  { animation-delay: 0.06s; }
.galeria-grid.is-expanded .proyecto-card--oculta:nth-child(9)  { animation-delay: 0.12s; }
.galeria-grid.is-expanded .proyecto-card--oculta:nth-child(10) { animation-delay: 0.18s; }

/* Botón Ver más */
.galeria-ver-mas-wrap {
  display: flex;
  justify-content: center;
  margin-top: var(--sp-m);
}

.galeria-ver-mas {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border: 1.5px solid var(--c-negro);
  background: transparent;
  color: var(--c-negro);
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.galeria-ver-mas:hover,
.galeria-ver-mas:focus {
  background: var(--c-naranja);
  border-color: var(--c-naranja);
  color: var(--c-blanco);
  outline: none;
}

.galeria-ver-mas-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.3s;
  flex-shrink: 0;
}

.galeria-ver-mas[aria-expanded="true"] .galeria-ver-mas-icon {
  transform: rotate(180deg);
}

.proyecto-card figcaption {
  padding: var(--sp-xs) var(--sp-s);
  font-size: var(--fs-small);
  color: var(--c-gris);
  background: var(--c-blanco);
}

/* CONTACTO */
.section--contacto {
  padding-block: 0;
  background: var(--c-negro);
}

.contacto-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* Panel izquierdo */
.contacto-left {
  background: var(--c-negro);
  padding: var(--sp-l) 1% var(--sp-l) 40%;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  min-height: 340px;
}

/* Blob decorativo naranja */
.contacto-left::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,160,68,0.09) 0%, transparent 68%);
  pointer-events: none;
}

.contacto-left::after { content: none; }

.contacto-kicker {
  display: block;
  font-size: 20px;
  color: var(--c-naranja);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--sp-s);
}

.contacto-headline {
  font-size: clamp(32px, 4vw, 56px);
  color: var(--c-blanco);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-s);
  font-weight: 400;
}

.contacto-texto {
  font-size: clamp(15px, 1vw + 12px, 19px);
  color: rgba(255,255,255,0.45);
  line-height: 1.65;
  max-width: 38ch;
  margin-top: var(--sp-s);
  margin-bottom: var(--sp-m);
}

.contacto-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  padding: 0.9em 2.2em;
  border: 1px solid var(--c-naranja);
  color: var(--c-naranja);
  font-family: var(--font-base);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  align-self: flex-start;
  transition: background 0.25s, color 0.25s;
}

.contacto-btn:hover {
  background: var(--c-naranja);
  color: var(--c-blanco);
}

.contacto-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.25s;
}

.contacto-btn:hover svg { transform: translateX(4px); }

/* Panel derecho */
.contacto-right {
  background: #CECECE;
  border-left: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Items de contacto */
.contacto-items {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.contacto-item {
  display: flex;
  align-items: center;
  gap: var(--sp-m);
  padding: var(--sp-m) var(--sp-l);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  cursor: default;
  flex: 1;
}

.contacto-item:last-child { border-bottom: none; }

.contacto-item-sq {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--c-naranja);
  color: #fff;
  flex-shrink: 0;
  transition: background 0.22s, color 0.22s, transform 0.18s;
  text-decoration: none;
}

.contacto-item-sq svg {
  width: 22px;
  height: 22px;
  transition: color 0.22s;
}

a.contacto-item-sq:hover {
  background: #fff;
  color: var(--c-naranja);
  transform: scale(1.08);
}

.contacto-item-sq--static {
  cursor: default;
}

.contacto-item-label {
  display: block;
  font-size: 10px;
  color: #888;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.4em;
}

.contacto-item-value {
  display: block;
  font-size: clamp(16px, 1.2vw + 11px, 22px);
  color: #333;
  transition: color 0.25s;
}

/* BRAND BAR */
.brand-bar {
  background: var(--c-blanco);
  border-top: 3px solid var(--c-naranja);
  padding: var(--sp-m) var(--sp-l);
  display: flex;
  align-items: center;
}

.brand-bar-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  margin-left: 8%;
  flex: 1;
}

.brand-bar-logo img {
  height: 180px;
  width: auto;
}

.brand-bar-tagline {
  font-size: clamp(22px, 2.5vw + 10px, 42px);
  color: #AAAAAA;
  line-height: 1.4;
}

.brand-bar-social {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-bar-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #AAAAAA;
  color: var(--c-blanco);
  transition: background 0.2s;
  flex-shrink: 0;
}

.brand-bar-social-btn:hover {
  background: var(--c-naranja);
  color: var(--c-blanco);
}

.brand-bar-social-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}

@media (max-width: 600px) {
  .brand-bar {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--sp-m);
    gap: var(--sp-s);
  }
  .brand-bar-logo {
    margin-left: 0;
    align-items: center;
  }
  .brand-bar-logo img {
    height: 130px;
  }
}

/* FOOTER */
.site-footer {
  background: var(--c-blanco);
  border-top: 3px solid var(--c-naranja);
  padding-block: var(--sp-m);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-m);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-s);
}

.footer-tagline {
  font-size: var(--fs-small);
  color: var(--c-gris);
  line-height: 1.5;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-s);
}

.footer-nav a {
  font-size: var(--fs-small);
  color: var(--c-gris);
}

.footer-nav a:hover { color: var(--c-naranja); }

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: var(--fs-small);
  color: var(--c-gris);
  margin-top: var(--sp-xs);
}

/* --- 7. Project Viewer --- */
.project-viewer {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  background: var(--c-blanco);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.project-viewer[hidden] { display: none; }

.viewer-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-m);
  padding: var(--sp-s) var(--sp-m);
  border-bottom: 1px solid var(--c-gris-claro);
  flex-shrink: 0;
}

.viewer-titulo {
  font-size: clamp(14px, 1vw + 11px, 17px);
  color: var(--c-negro);
  font-weight: 400;
  line-height: 1.4;
}

.viewer-desc {
  font-size: var(--fs-small);
  color: var(--c-gris);
  margin-top: 0.3em;
  line-height: 1.5;
}

.viewer-cerrar {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-base);
  font-size: var(--fs-small);
  color: var(--c-gris);
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding: 0.1em 0;
  transition: color 0.2s;
}

.viewer-cerrar:hover { color: var(--c-negro); }

.viewer-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: 1;
  min-height: 0;
}

/* Panel izquierdo: miniaturas */
.viewer-thumbs {
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  align-content: start;
  padding: 3px;
  background: #ebebeb;
}

.thumb-item {
  padding: 0;
  background: none;
  border: 2px solid transparent;
  cursor: pointer;
  aspect-ratio: 1;
  overflow: hidden;
  display: block;
  transition: border-color 0.15s;
}

.thumb-item.is-active { border-color: var(--c-naranja); }

.thumb-item:hover { border-color: rgba(242,160,68,0.5); }

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Panel derecho: foto principal */
.viewer-main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #1c1c1c; /* fallback antes de que cargue la imagen */
}

/* Fondo blurreado: hereda background-image seteado por JS */
.viewer-main::before {
  content: '';
  position: absolute;
  inset: -30px; /* sobredimensionado para cubrir bordes del blur */
  background-image: inherit;
  background-size: cover;
  background-position: center;
  filter: blur(22px) brightness(0.5);
  z-index: 0;
}

.viewer-foto {
  position: relative;
  z-index: 1;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.viewer-prev,
.viewer-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.30);
  border: none;
  color: var(--c-blanco);
  font-size: 2.8rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.4em 0.6em;
  transition: background 0.2s;
  z-index: 2;
  font-family: inherit;
}

.viewer-prev { left: 0; }
.viewer-next { right: 0; }

.viewer-prev:hover,
.viewer-next:hover { background: rgba(0,0,0,0.60); }

/* --- 8. Responsive --- */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--c-blanco);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--sp-s) var(--sp-m);
    border-bottom: 1px solid var(--c-gris-claro);
    gap: var(--sp-s);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  }

  .nav-menu.is-open { display: flex; }

  .section--portada {
    grid-template-columns: 1fr;
    grid-template-rows: 55vw auto;
    min-height: 100svh;
    min-height: 100dvh;
  }

  .portada-imagen { height: 100%; }

  .filosofia-grid { grid-template-columns: 1fr; gap: 0; }
  .filosofia-bloque:first-child {
    padding-left: clamp(2rem, 5vw, 6rem);
    padding-right: clamp(2rem, 5vw, 6rem);
  }

  .section--quienes-somos .container,
  .section--servicio .container {
    grid-template-columns: 1fr;
    gap: var(--sp-s);
  }

  .section--quienes-somos .section-title,
  .section--servicio .section-title {
    margin-bottom: var(--sp-s);
  }

  /* Viewer mobile: columna única (thumbs arriba, foto abajo) */
  .viewer-body {
    grid-template-columns: 1fr;
    grid-template-rows: 140px 1fr;
  }

  .viewer-thumbs {
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  }

  .viewer-header { padding: var(--sp-xs) var(--sp-s); }

  .contacto-wrap { grid-template-columns: 1fr; }
  .contacto-left { padding: var(--sp-l) var(--sp-m); min-height: unset; }
  .contacto-right { border-top: 2px solid var(--c-naranja); }
  .contacto-item { padding: var(--sp-m) var(--sp-m); }

  .footer-inner { flex-direction: column; align-items: flex-start; }

  .lightbox-img-placeholder {
    width: 90vw;
    height: 50vw;
  }

  .lightbox-prev,
  .lightbox-next { padding: var(--sp-xs); }
}

@media (max-width: 480px) {
  .section { padding-block: var(--sp-m); }
  .section--portada { padding-block: var(--sp-l); }
  .galeria-grid { grid-template-columns: 1fr; }
}

/* --- 9. Accesibilidad --- */
:focus-visible {
  outline: 2px solid var(--c-naranja);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* =============================================================
   SCROLL REVEAL
   ============================================================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================================
   QUIÉNES SOMOS — rediseño
   ============================================================= */

/* Override del grid anterior */
.section--quienes-somos .container { display: block; }

.section--quienes-somos { background: var(--c-blanco); }

.qs-header {
  margin-bottom: var(--sp-l);
}

.qs-title {
  font-size: clamp(36px, 5vw, 64px) !important;
  font-weight: 400 !important;
  color: rgba(0,0,0,0.16) !important;
  letter-spacing: -0.01em !important;
  line-height: 1 !important;
  margin-bottom: 0.3em !important;
  white-space: normal;
}

.qs-title-line {
  height: 2px;
  width: 100%;
  background: var(--c-naranja);
}

.qs-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--sp-l);
  align-items: start;
  margin-bottom: var(--sp-l);
}

.qs-lead {
  font-size: clamp(17px, 1vw + 13px, 22px);
  line-height: 1.9;
  color: var(--c-negro);
  margin-bottom: var(--sp-m);
}

.qs-col-main p:not(.qs-lead):not(.qs-destacado) {
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: var(--c-gris);
  margin-bottom: var(--sp-s);
  line-height: 1.75;
}

.qs-destacado {
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: #1F1F1F;
  font-weight: 500;
  margin-bottom: var(--sp-s);
}

.qs-col-aside {
  display: flex;
  flex-direction: column;
  gap: var(--sp-s);
}

/* Stats box */
.qs-stats {
  background: var(--c-negro);
  padding: var(--sp-m);
}

.qs-stat {
  padding-block: var(--sp-s);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.qs-stat:first-child { padding-top: 0; }
.qs-stat:last-child  { border-bottom: none; padding-bottom: 0; }

.qs-stat-row {
  display: flex;
  align-items: baseline;
  gap: 0.1em;
  line-height: 1;
}

.qs-stat-num {
  font-size: clamp(38px, 4vw, 54px);
  color: var(--c-naranja);
  letter-spacing: -0.03em;
  font-weight: 400;
}

.qs-stat-plus {
  font-size: clamp(22px, 2.5vw, 32px);
  color: var(--c-naranja);
}

.qs-stat-label {
  display: block;
  font-size: var(--fs-small);
  color: rgba(255,255,255,0.40);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 0.35em;
}

/* Signature card */
.qs-firma-card {
  background: var(--c-blanco);
  border: 1px solid rgba(0,0,0,0.09);
  padding: var(--sp-s);
  display: flex;
  align-items: center;
  gap: var(--sp-s);
}

.qs-firma-foto {
  width: 80px;
  height: 80px;
  object-fit: cover;
  object-position: center top;
  flex-shrink: 0;
  display: block;
}

.qs-firma-cargo {
  font-size: var(--fs-small);
  color: var(--c-gris);
  margin-bottom: 0.25em;
  line-height: 1.4;
}

.qs-firma-nombre {
  font-size: var(--fs-body);
  color: var(--c-negro);
  letter-spacing: 0.03em;
}

/* Value cards */
.qs-values {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(0,0,0,0.08);
  border-top: 2px solid var(--c-naranja);
}

.qs-value-card {
  background: var(--c-blanco);
  padding: var(--sp-m) var(--sp-s);
  cursor: default;
  transition: background 0.35s ease;
}

.qs-value-card:hover { background: var(--c-negro); }

.qs-value-icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--sp-s);
  color: var(--c-azul);
  transition: color 0.35s ease;
}

.qs-value-card:hover .qs-value-icon { color: var(--c-naranja); }

.qs-value-card h3 {
  font-size: var(--fs-body);
  color: var(--c-negro);
  margin-bottom: 0.5em;
  letter-spacing: 0.02em;
  transition: color 0.35s ease;
}

.qs-value-card:hover h3 { color: var(--c-blanco); }

.qs-value-card p {
  font-size: var(--fs-small);
  color: var(--c-gris);
  line-height: 1.65;
  transition: color 0.35s ease;
}

.qs-value-card:hover p { color: rgba(255,255,255,0.50); }

/* =============================================================
   SERVICIOS — estructura compartida
   ============================================================= */

.section--diseno,
.section--arquitectura,
.section--construccion {
  position: relative;
  overflow: hidden;
}

.servicio-pro-header {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-s);
  margin-bottom: var(--sp-l);
  padding-bottom: var(--sp-m);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.servicio-num {
  font-size: clamp(72px, 12vw, 130px);
  line-height: 0.85;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(0,0,0,0.05);
  user-select: none;
  flex-shrink: 0;
}

.servicio-pro-title-wrap { flex: 1; }

.servicio-pro-title {
  font-size: clamp(28px, 3.5vw, 46px);
  color: var(--c-azul);
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 0.3em;
}

.servicio-pro-sub {
  font-size: var(--fs-small);
  color: var(--c-gris);
  letter-spacing: 0.06em;
}

.servicio-pro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-l);
  align-items: start;
}

.servicio-pro-desc p {
  margin-bottom: var(--sp-s);
  color: var(--c-negro);
  line-height: 1.85;
  max-width: 58ch;
}

.servicio-pro-destacado {
  font-size: clamp(15px, 0.8vw + 12px, 17px) !important;
  color: var(--c-azul) !important;
  border-left: 3px solid var(--c-naranja);
  padding-left: var(--sp-s);
  margin-top: var(--sp-m) !important;
  line-height: 1.6 !important;
}

/* Feature list */
.servicio-feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.servicio-feature-list li {
  padding: 0.85em 0;
  border-bottom: 1px solid rgba(0,0,0,0.07);
  font-size: var(--fs-body);
  color: var(--c-negro);
  display: flex;
  align-items: center;
  gap: 0.85em;
}

.servicio-feature-list li:first-child { padding-top: 0; }

.servicio-feature-list li::before {
  content: '';
  display: block;
  width: 22px;
  height: 1px;
  background: var(--c-naranja);
  flex-shrink: 0;
  transition: width 0.3s ease;
}

.servicio-feature-list li:hover::before { width: 36px; }

/* =============================================================
   DISEÑO
   ============================================================= */
.section--diseno {
  background: var(--c-gris-claro);
  padding-block: var(--sp-m);
}

.section--diseno .arq2-title { color: rgba(0,0,0,0.35); }

.dis2-top {
  display: grid;
  grid-template-columns: 300px 540px;
  gap: var(--sp-m);
  align-items: center;
  margin-bottom: var(--sp-m);
}

.dis2-img img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: block;
}

.dis2-intro p {
  color: var(--c-gris) !important;
  line-height: 1.75;
  font-size: clamp(17px, 1vw + 13px, 22px);
  font-weight: 550;
}

.dis2-body {
  color: var(--c-gris);
  line-height: 1.75;
  font-size: clamp(17px, 1vw + 13px, 22px);
}

.dis2-body p {
  margin-bottom: var(--sp-s);
}

.dis2-calidad {
  color: var(--c-gris) !important;
  font-size: clamp(17px, 1vw + 13px, 22px) !important;
}

.dis2-tipos {
  font-size: clamp(17px, 1vw + 13px, 22px) !important;
  font-weight: 600;
  color: var(--c-gris) !important;
  margin-top: var(--sp-s);
}

/* =============================================================
   ARQUITECTURA — layout referencia
   ============================================================= */
.section--arquitectura {
  background: var(--c-blanco);
  color: var(--c-negro);
}

.arq2-header {
  margin-bottom: var(--sp-m);
}

.arq2-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  color: rgba(0,0,0,0.16);
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 0.3em;
}

.arq2-title-line {
  height: 2px;
  background: var(--c-naranja);
  width: 100%;
}

.arq2-main {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--sp-l);
  align-items: start;
}

.arq2-top-row {
  display: grid;
  grid-template-columns: 42% 1fr;
  gap: var(--sp-m);
  align-items: center;
  margin-bottom: var(--sp-m);
}

.arq2-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.arq2-intro p {
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: var(--c-negro);
  line-height: 1.75;
}

.arq2-body p {
  font-size: clamp(17px, 1vw + 13px, 22px);
  margin-bottom: var(--sp-s);
  color: var(--c-negro);
  line-height: 1.75;
}

.arq2-light { color: var(--c-gris) !important; }

.arq2-small { font-size: var(--fs-small) !important; }

.arq2-asesor {
  font-size: clamp(17px, 0.9vw + 12px, 22px);
  color: var(--c-negro) !important;
  font-weight: 500;
  line-height: 1.7 !important;
  text-align: right;
  padding-right: 24px;
  border-right: 3px solid var(--c-naranja);
  margin-top: var(--sp-m);
  margin-bottom: var(--sp-m);
  margin-left: auto;
  max-width: 70%;
}

/* Etapas box */
.arq2-etapas-box {
  margin-bottom: var(--sp-m);
}

.arq2-etapas-header {
  background: #6B7278;
  color: var(--c-blanco);
  padding: 0.7em 1em;
  font-size: var(--fs-body);
  letter-spacing: 0.02em;
}

.arq2-etapas-list {
  background: #5A6268;
}

.arq2-etapa {
  padding: 0.65em 1em;
  color: var(--c-blanco);
  font-size: var(--fs-small);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  line-height: 1.4;
}

.arq2-etapa:last-child { border-bottom: none; }

/* Tipos con cuadrado naranja a la derecha */
.arq2-tipos {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.arq2-tipo {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75em;
  padding: 0.55em 0;
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: var(--c-negro);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.arq2-tipo:last-child { border-bottom: none; }

.arq2-tipo-sq {
  width: 18px;
  height: 18px;
  background: var(--c-naranja);
  flex-shrink: 0;
  display: block;
}

/* =============================================================
   CONSTRUCCIÓN — layout referencia
   ============================================================= */
.section--construccion {
  background: #546670;
  color: var(--c-blanco);
}

.const2-header {
  margin-bottom: var(--sp-m);
}

.const2-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  color: var(--c-blanco);
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 0.3em;
}

.const2-title-line {
  height: 2px;
  background: var(--c-naranja);
  width: 100%;
}

.const2-row1 {
  display: grid;
  grid-template-columns: 45% 1fr;
  gap: var(--sp-m);
  align-items: center;
  margin-bottom: var(--sp-m);
}

.const2-img img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  display: block;
}

.const2-intro-text p {
  font-size: clamp(19px, 1.3vw + 14px, 26px);
  color: var(--c-blanco);
  line-height: 1.8;
}

.const2-row2 {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--sp-l);
  align-items: start;
  margin-bottom: var(--sp-m);
}

.const2-body p {
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: var(--c-blanco);
  margin-bottom: var(--sp-s);
  line-height: 1.75;
}

.const2-body-small {
  color: rgba(255,255,255,0.55) !important;
  font-size: clamp(17px, 1vw + 13px, 22px) !important;
}

.const2-cats {
  margin-bottom: var(--sp-m);
  max-width: 260px;
  margin-left: auto;
}

.const2-cat {
  display: flex;
  align-items: center;
  gap: 0.75em;
  padding: 0.7em 1em;
  background: rgba(0,0,0,0.22);
  margin-bottom: 4px;
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: var(--c-blanco);
}

.const2-cat-sq {
  width: 18px;
  height: 18px;
  background: var(--c-naranja);
  flex-shrink: 0;
  display: block;
}

.const2-altura {
  font-size: clamp(16px, 0.7vw + 11px, 21px);
  color: rgba(255,255,255,0.70);
  line-height: 1.65;
  max-width: 260px;
  margin-left: auto;
}

.const2-quote {
  border-left: 4px solid var(--c-naranja);
  padding: var(--sp-s) var(--sp-m);
  background: rgba(0,0,0,0.15);
  margin-bottom: var(--sp-s);
}

.const2-quote p {
  font-size: clamp(17px, 1vw + 13px, 22px);
  color: rgba(255,255,255,0.85);
  line-height: 1.75;
}

.const2-cta-wrap {
  margin-top: var(--sp-xs);
}

.const2-cta {
  display: inline-block;
  padding: 0.85em 2em;
  background: rgba(0,0,0,0.28);
  color: var(--c-blanco);
  font-size: var(--fs-body);
  letter-spacing: 0.04em;
  transition: background 0.25s, color 0.25s;
}

.const2-cta:hover {
  background: var(--c-naranja);
  color: var(--c-blanco);
}

/* =============================================================
   RESPONSIVE — nuevas secciones
   ============================================================= */
@media (max-width: 900px) {
  .qs-grid { grid-template-columns: 1fr; }
  .qs-values { grid-template-columns: repeat(2, 1fr); }
  .servicio-pro-grid { grid-template-columns: 1fr; }
  .const2-row1,
  .const2-row2 { grid-template-columns: 1fr; }
  .const2-img img { height: 220px; }
  .const2-cats {
    max-width: 100%;
    margin-left: 0;
  }
  .const2-altura {
    max-width: 100%;
    margin-left: 0;
  }
  .arq2-main { grid-template-columns: 1fr; }
  .arq2-top-row { grid-template-columns: 1fr; }
  .arq2-img img { height: 220px; }
  .arq2-tipos { align-items: flex-start; }
  .arq2-tipo { justify-content: flex-start; }
  .arq2-tipo-sq { order: -1; }
  .arq2-asesor {
    max-width: 100%;
    margin-left: 0;
  }

  .dis2-top { grid-template-columns: 1fr; }
  .dis2-img img { height: 240px; }
}

@media (max-width: 600px) {
  .qs-values { grid-template-columns: 1fr; }
  .servicio-num { font-size: 64px; }

  /* Arquitectura mobile */
  .arq2-img img { height: 180px; }
  .arq2-intro p,
  .arq2-body p,
  .arq2-asesor { font-size: clamp(15px, 4vw + 8px, 18px) !important; }
  .arq2-tipo { font-size: clamp(15px, 4vw + 8px, 18px); }
  .arq2-asesor {
    text-align: left;
    border-right: none;
    border-left: 3px solid var(--c-naranja);
    padding-right: 0;
    padding-left: var(--sp-s);
    max-width: 100%;
    margin-left: 0;
  }

  .dis2-img img { height: 200px; }
  .dis2-intro p,
  .dis2-body,
  .dis2-calidad,
  .dis2-tipos { font-size: clamp(15px, 4vw + 8px, 18px) !important; }
}