/* =====================================================================
   Barella Arquitectura — Hoja de estilos principal
   Estilo: minimalista editorial (charcoal / off-white, serif Playfair)
   ===================================================================== */

/* --------------------------------------------------------------------
   :root  —  variables de diseño
   -------------------------------------------------------------------- */
:root {
  /* Paleta */
  --color-bg: #FAFAF7;
  --color-ink: #1A1A1A;
  --color-graphite: #3A3A3A;
  --color-stone: #6B6B6B;
  --color-stone-strong: #4A4A4A;
  --color-line: #E3E0D8;
  --color-accent: #A8967A;
  --color-overlay: rgba(26, 26, 26, 0.55);

  /* Tipografía */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;

  /* Escala de espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 5rem;
  --space-7: 8rem;

  /* Layout */
  --container-max: 1280px;
  --container-narrow: 860px;
  --header-h: 80px;

  /* Transiciones */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --dur: 0.35s;
}

/* --------------------------------------------------------------------
   Reset  —  base moderna
   -------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Offset para el header fijo al navegar a anclas (mismas y cruzadas) */
  scroll-padding-top: 90px;
}

/* Utilidad de ocultamiento accesible (screen-reader only) */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-graphite);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, picture, iframe {
  max-width: 100%;
  display: block;
  height: auto;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-ink);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
}

p { margin: 0 0 var(--space-2); }

/* --------------------------------------------------------------------
   Tipografía fluida (clamp)
   -------------------------------------------------------------------- */
h1 { font-size: clamp(2.5rem, 7vw, 6rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.3rem, 2.4vw, 1.9rem); }
h4 { font-size: clamp(1.1rem, 1.8vw, 1.35rem); }

.lead {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-graphite);
}

/* Etiqueta editorial en versalitas */
.label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-stone);
  display: inline-block;
}

.meta {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-stone-strong);
}

/* --------------------------------------------------------------------
   Layout  —  contenedores y secciones
   -------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.container--narrow { max-width: var(--container-narrow); }

.section {
  padding: var(--space-6) 0;
}

.section--tight { padding: var(--space-5) 0; }

.section--bleed {
  padding: var(--space-7) 0;
}

@media (max-width: 768px) {
  .section { padding: var(--space-5) 0; }
  .section--bleed { padding: var(--space-6) 0; }
}

.section-head {
  margin-bottom: var(--space-5);
}

.section-head .label { margin-bottom: var(--space-2); }

.divider {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 0;
}

/* --------------------------------------------------------------------
   Skip link (accesibilidad)
   -------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  z-index: 1000;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------
   Header / Nav
   -------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--space-3);
  background: transparent;
  transition: background var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              height var(--dur) var(--ease);
}

.site-header.scrolled {
  background: var(--color-bg);
  box-shadow: 0 1px 0 var(--color-line);
  height: 64px;
}

.site-header.scrolled .site-header__logo svg text { fill: var(--color-ink); }

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

.site-header__logo svg {
  height: 44px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__link {
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bg);
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--dur) var(--ease);
}

.site-header.scrolled .site-nav__link,
body.interior .site-nav__link {
  color: var(--color-ink);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--dur) var(--ease);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after { width: 100%; }

.site-nav__cta {
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.65rem 1.2rem;
  border: 1px solid currentColor;
  color: var(--color-bg);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.site-header.scrolled .site-nav__cta,
body.interior .site-nav__cta {
  color: var(--color-ink);
}
.site-nav__cta:hover, .site-nav__cta:focus-visible {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 36px;
  height: 36px;
  position: relative;
  color: var(--color-bg);
}
body.interior .nav-toggle,
.site-header.scrolled .nav-toggle { color: var(--color-ink); }

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__bar { top: 50%; transform: translateY(-50%); }
.nav-toggle__bar::before { top: -7px; }
.nav-toggle__bar::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 767px) {
  .nav-toggle { display: block; }

  /* Toggle must stay clickable above the full-screen open nav */
  .nav-toggle { z-index: 200; position: relative; }

  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-3);
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease);
    pointer-events: none;
    z-index: 100;
  }
  .site-nav.is-open {
    transform: translateX(0);
    pointer-events: auto;
  }
  .site-nav__list {
    flex-direction: column;
    gap: var(--space-4);
  }
  .site-nav__link,
  .site-header.scrolled .site-nav__link,
  body.interior .site-nav__link {
    color: var(--color-ink);
    font-size: 1.125rem;
  }
  .site-nav__cta,
  .site-header.scrolled .site-nav__cta,
  body.interior .site-nav__cta {
    color: var(--color-ink);
  }
}

/* --------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  padding: var(--space-7) var(--space-3) var(--space-6);
  background-color: var(--color-ink);
  background-image: url("../assets/hero-fallback.svg");
  background-size: cover;
  background-position: center;
  color: var(--color-bg);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,26,26,0.35) 0%, rgba(26,26,26,0.65) 100%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}
.hero__label {
  color: rgba(250, 250, 247, 0.7);
  margin-bottom: var(--space-3);
}
.hero h1 {
  color: var(--color-bg);
  max-width: 14ch;
  margin-bottom: var(--space-3);
}
.hero__subtitle {
  max-width: 46ch;
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  color: rgba(250, 250, 247, 0.85);
  margin-bottom: var(--space-4);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* --------------------------------------------------------------------
   Botones / enlaces de acción
   -------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 1rem 2rem;
  border: 1px solid var(--color-ink);
  background: var(--color-ink);
  color: var(--color-bg);
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn:hover, .btn:focus-visible {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn--ghost {
  background: transparent;
  color: var(--color-ink);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn--light {
  background: var(--color-bg);
  border-color: var(--color-bg);
  color: var(--color-ink);
}
.btn--light:hover, .btn--light:focus-visible {
  background: transparent;
  color: var(--color-bg);
  border-color: var(--color-bg);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink);
  position: relative;
  padding-bottom: 4px;
}
.text-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}
.text-link:hover, .text-link:focus-visible { color: var(--color-accent); }

.text-link--light { color: var(--color-bg); }

/* --------------------------------------------------------------------
   Manifiesto (intro)
   -------------------------------------------------------------------- */
.manifesto {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-5);
  align-items: start;
}
.manifesto__text {
  grid-column: 1 / -1;
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.4;
  color: var(--color-ink);
  font-weight: 400;
}
.manifesto__text em { font-style: italic; color: var(--color-accent); }
@media (max-width: 768px) {
  .manifesto { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* --------------------------------------------------------------------
   Servicios preview
   -------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.service-card {
  background: var(--color-bg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: background var(--dur) var(--ease);
}
.service-card:hover { background: #F4F2EC; }
.service-card svg {
  width: 48px;
  height: 48px;
  transition: transform var(--dur) var(--ease);
}
.service-card:hover svg { transform: translateY(-4px); }
.service-card h3 {
  font-size: 1.25rem;
  margin-top: var(--space-1);
}
.service-card .text-link { margin-top: auto; }

@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------
   Proyectos destacados (editorial alternado)
   -------------------------------------------------------------------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: center;
  padding: var(--space-5) 0;
}
.feature--reverse .feature__media { order: 2; }
.feature__media {
  overflow: hidden;
  border: 1px solid var(--color-line);
}
.feature__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(20%);
  transition: filter var(--dur) var(--ease), transform 0.6s var(--ease);
}
.feature:hover .feature__media img {
  filter: grayscale(0%);
  transform: scale(1.02);
}
.feature__body .label { margin-bottom: var(--space-2); }
.feature__body h3 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: var(--space-2);
}
.feature__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.feature__desc { color: var(--color-graphite); margin-bottom: var(--space-3); }

@media (max-width: 768px) {
  .feature {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-4) 0;
  }
  .feature--reverse .feature__media { order: 0; }
}

/* --------------------------------------------------------------------
   Estudio teaser
   -------------------------------------------------------------------- */
.studio-teaser {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.studio-teaser__body h2 { margin-bottom: var(--space-3); }
.studio-teaser__body p { color: var(--color-graphite); }
@media (max-width: 768px) {
  .studio-teaser { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* --------------------------------------------------------------------
   Estadísticas / publicaciones
   -------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  text-align: center;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-5) 0;
}
.stat__number {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--color-ink);
  line-height: 1;
  margin-bottom: var(--space-1);
}
.stat__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-stone);
}
@media (max-width: 768px) {
  .stats { grid-template-columns: 1fr; gap: var(--space-4); }
}

.publications {
  text-align: center;
}
.publications .label { margin-bottom: var(--space-3); }
.publications__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-ink);
}

/* --------------------------------------------------------------------
   CTA band (full-bleed charcoal)
   -------------------------------------------------------------------- */
.cta-band {
  background: var(--color-ink);
  color: var(--color-bg);
  text-align: center;
  padding: var(--space-7) var(--space-3);
}
.cta-band h2 {
  color: var(--color-bg);
  max-width: 18ch;
  margin: 0 auto var(--space-4);
}
.cta-band .label { color: rgba(250,250,247,0.7); margin-bottom: var(--space-3); }

/* --------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  padding: var(--space-6) 0 var(--space-4);
  color: var(--color-graphite);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.footer-col h3,
.footer-col .footer-title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin: 0 0 var(--space-3);
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a { font-size: 0.9375rem; transition: color var(--dur) var(--ease); }
.footer-col a:hover, .footer-col a:focus-visible { color: var(--color-accent); }

.footer-brand svg { height: 56px; width: auto; margin-bottom: var(--space-3); }
.footer-brand p { font-size: 0.9375rem; max-width: 32ch; color: var(--color-graphite); }

.footer-contact li { font-size: 0.9375rem; line-height: 1.6; }
.footer-contact a { display: inline-flex; align-items: center; gap: 0.4rem; }

.footer-social { display: flex; gap: var(--space-2); margin-top: var(--space-2); }
.footer-social a {
  display: inline-flex;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  border: 1px solid var(--color-line);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.footer-social a:hover, .footer-social a:focus-visible {
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.footer-social svg { width: 18px; height: 18px; }

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-stone);
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------
   WhatsApp flotante
   -------------------------------------------------------------------- */
.whatsapp-fab {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #25D366;
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
  z-index: 90;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.whatsapp-fab:hover, .whatsapp-fab:focus-visible {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 10px 26px rgba(0,0,0,0.25);
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}
.whatsapp-fab svg { width: 28px; height: 28px; }

@media (max-width: 480px) {
  .whatsapp-fab { width: 50px; height: 50px; right: var(--space-2); bottom: var(--space-2); }
  .whatsapp-fab svg { width: 24px; height: 24px; }
}

/* --------------------------------------------------------------------
   Páginas interiores: cabecera de página
   -------------------------------------------------------------------- */
.page-hero {
  padding: calc(var(--header-h) + var(--space-6)) 0 var(--space-5);
  border-bottom: 1px solid var(--color-line);
}
.page-hero h1 { margin-bottom: var(--space-3); max-width: 16ch; }
.page-hero .lead { max-width: 60ch; color: var(--color-graphite); }

main { display: block; padding-top: 0; }
body.interior main { padding-top: 0; }

/* --------------------------------------------------------------------
   Equipo
   -------------------------------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
.team-card {
  border: 1px solid var(--color-line);
  padding: var(--space-4);
}
.team-card h3 { font-size: 1.4rem; margin-bottom: var(--space-1); }
.team-card .role {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: var(--space-2);
}
.team-card p { color: var(--color-graphite); font-size: 0.9375rem; }
@media (max-width: 768px) { .team-grid { grid-template-columns: 1fr; } }

.collaborators {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.collaborators li {
  border-left: 1px solid var(--color-line);
  padding: var(--space-2) var(--space-3);
  font-size: 0.9375rem;
}
.collaborators strong { display: block; color: var(--color-ink); }
.collaborators span { color: var(--color-stone); font-size: 0.8125rem; letter-spacing: 0.1em; text-transform: uppercase; }
@media (max-width: 480px) { .collaborators { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------
   Proceso de trabajo
   -------------------------------------------------------------------- */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.process__step {
  background: var(--color-bg);
  padding: var(--space-4);
}
.process__num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-1);
}
.process__step h3 { margin-bottom: var(--space-1); font-size: 1.05rem; }
.process__step p { font-size: 0.875rem; color: var(--color-graphite); margin: 0; }
@media (max-width: 1024px) { .process { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .process { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------
   Portfolio grid (proyectos.html)
   -------------------------------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.filter-bar__legend {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-ink);
  font-weight: 600;
  margin-right: var(--space-1);
}
.filter-bar__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-stone);
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--color-line);
}
.filter-bar__label.is-active {
  /* Reservado para futura implementación de filtros */
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.project-tile {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  transition: border-color var(--dur) var(--ease);
}
.project-tile:hover { border-color: var(--color-ink); }
.project-tile__media { overflow: hidden; }
.project-tile__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(25%);
  transition: filter var(--dur) var(--ease), transform 0.6s var(--ease);
}
.project-tile:hover .project-tile__media img {
  filter: grayscale(0%);
  transform: scale(1.03);
}
.project-tile__body { padding: var(--space-3); display: flex; flex-direction: column; gap: var(--space-1); }
.project-tile__body h3 { font-size: 1.5rem; }
.project-tile__meta {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-stone);
}
.project-tile__desc { font-size: 0.9375rem; color: var(--color-graphite); margin: 0; }

@media (max-width: 1024px) { .projects-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .projects-grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------
   Servicios (detalle)
   -------------------------------------------------------------------- */
.service-detail {
  display: grid;
  grid-template-columns: 80px 1fr 1.4fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
  align-items: start;
}
.service-detail:last-of-type { border-bottom: 1px solid var(--color-line); }
.service-detail__icon svg { width: 56px; height: 56px; }
.service-detail__title h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.service-detail__title .num {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-stone);
  text-transform: uppercase;
  margin-bottom: var(--space-1);
  display: block;
}
.service-detail__desc p { color: var(--color-graphite); }
.service-detail__list {
  margin-top: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.service-detail__list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.9375rem;
  color: var(--color-graphite);
}
.service-detail__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 8px; height: 1px;
  background: var(--color-accent);
}
@media (max-width: 768px) {
  .service-detail { grid-template-columns: 1fr; gap: var(--space-2); }
  .service-detail__icon svg { width: 44px; height: 44px; }
}

/* --------------------------------------------------------------------
   FAQ acordeón
   -------------------------------------------------------------------- */
.faq-list { display: flex; flex-direction: column; }
.faq-item { border-top: 1px solid var(--color-line); }
.faq-item:last-child { border-bottom: 1px solid var(--color-line); }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: var(--space-3) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-ink);
}
.faq-question:hover { color: var(--color-accent); }
.faq-question .faq-icon {
  position: relative;
  width: 16px; height: 16px;
  flex-shrink: 0;
}
.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.faq-question .faq-icon::before {
  left: 0; right: 0; top: 50%; height: 1.5px; transform: translateY(-50%);
}
.faq-question .faq-icon::after {
  top: 0; bottom: 0; left: 50%; width: 1.5px; transform: translateX(-50%);
}
.faq-question[aria-expanded="true"] .faq-icon::after { opacity: 0; transform: translateX(-50%) rotate(90deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease);
}
.faq-answer__inner {
  padding: 0 0 var(--space-3);
  color: var(--color-graphite);
  max-width: 70ch;
}

/* --------------------------------------------------------------------
   Contacto
   -------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-5);
  align-items: start;
}
.contact-info ul { display: flex; flex-direction: column; gap: var(--space-3); margin-top: var(--space-3); }
.contact-info li { display: flex; flex-direction: column; gap: 0.2rem; }
.contact-info li .label { color: var(--color-stone); }
.contact-info li a, .contact-info li span { font-size: 1rem; color: var(--color-ink); }
.contact-info li a { transition: color var(--dur) var(--ease); }
.contact-info li a:hover { color: var(--color-accent); }

.contact-form {
  border: 1px solid var(--color-line);
  padding: var(--space-4);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-field--full { grid-column: 1 / -1; }
.form-field label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-stone-strong);
  font-weight: 500;
}
.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-ink);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  padding: 0.85rem 1rem;
  width: 100%;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.form-field textarea { min-height: 140px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-ink);
  box-shadow: 0 0 0 3px rgba(168, 150, 122, 0.25);
}
.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea {
  border-color: #B33A3A;
}
.error {
  font-size: 0.8125rem;
  color: #B33A3A;
  display: none;
}
.form-field.has-error .error { display: block; }

.form-success {
  display: none;
  margin-top: var(--space-3);
  padding: var(--space-3);
  background: #F0EDE5;
  border-left: 3px solid var(--color-accent);
  color: var(--color-ink);
  font-size: 0.9375rem;
}
.form-success.is-visible { display: block; }

.contact-form .btn { width: 100%; margin-top: var(--space-2); }

.map-embed {
  margin-top: var(--space-5);
  border: 1px solid var(--color-line);
}
.map-embed iframe {
  width: 100%;
  height: 420px;
  border: 0;
  display: block;
}

@media (max-width: 768px) {
  .contact-layout { grid-template-columns: 1fr; gap: var(--space-4); }
  .form-row { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------
   Disciplinas - lista editorial (reemplaza grilla de cards iguales)
   -------------------------------------------------------------------- */
.index-list {
  border-top: 1px solid var(--color-line);
}
.index-list__row {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 1.6fr;
  gap: var(--space-5);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-line);
  align-items: baseline;
  transition: padding-left var(--dur) var(--ease);
}
.index-list__row:hover,
.index-list__row:focus-within {
  padding-left: var(--space-2);
}
.index-list__row h3 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  transition: color var(--dur) var(--ease);
}
.index-list__row:hover h3 {
  color: var(--color-accent);
}
.index-list__row p {
  color: var(--color-graphite);
  margin: 0;
  max-width: 52ch;
}
@media (max-width: 768px) {
  .index-list__row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-3) 0;
  }
  .index-list__row:hover { padding-left: 0; }
}

/* --------------------------------------------------------------------
   Indice de obras (lista textual compacta, sin imagenes repetidas)
   -------------------------------------------------------------------- */
.works-index {
  margin-top: var(--space-5);
  border-top: 1px solid var(--color-line);
}
.works-index__row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
  transition: color var(--dur) var(--ease);
}
.works-index__row:hover .works-index__name {
  color: var(--color-accent);
}
.works-index__name {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: var(--color-ink);
  transition: color var(--dur) var(--ease);
}
.works-index__year,
.works-index__loc {
  font-size: 0.875rem;
  color: var(--color-stone);
  letter-spacing: 0.05em;
  white-space: nowrap;
}
@media (max-width: 600px) {
  .works-index__row {
    grid-template-columns: 1fr auto;
    gap: var(--space-1) var(--space-2);
  }
  .works-index__year { display: none; }
}

/* --------------------------------------------------------------------
   Proceso - pasos sin numeros decorativos
   -------------------------------------------------------------------- */
.process__step h3 { margin-bottom: var(--space-1); font-size: 1.1rem; }
.process__step p { font-size: 0.875rem; color: var(--color-graphite); margin: 0; }

/* --------------------------------------------------------------------
   Reveal animation (IntersectionObserver)
   -------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------
   Focus visible global
   -------------------------------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}