/* ===================================
   ADarquitectos — Estilos principales
   =================================== */

/* --- Variables --- */
:root {
  --color-bg:         #FFFFFF;
  --color-text:       #222222;
  --color-heading:    #1A1A1A;
  --color-border:     #DDDDDD;
  --color-bg-alt:     #CBD5E1;
  --color-meta:       #94A3B8;
  --color-brand:      #475569;
  --color-brand-alt:  #64748B;

  --font-base: 'Century Gothic', CenturyGothic, AppleGothic, sans-serif;

  --space-xs:   0.5rem;
  --space-sm:   1rem;
  --space-md:   2rem;
  --space-lg:   4rem;
  --space-xl:   7rem;

  --max-width: 1200px;
  --header-h:  72px;
}

/* --- Reset mínimo --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- Utilidades --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ===================================
   ANIMACIONES
   =================================== */

/* Hero: entrada al cargar la página */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.anim-hero {
  opacity: 0;
  animation: fadeInUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.anim-d1 { animation-delay: 0.2s; }
.anim-d2 { animation-delay: 0.45s; }
.anim-d3 { animation-delay: 0.7s; }
.anim-d4 { animation-delay: 0.95s; }
.anim-d5 { animation-delay: 1.4s; }

/* Scroll: elementos que aparecen al entrar en pantalla */
.anim-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.anim-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
   HEADER
   =================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s;
}
.site-header.scrolled {
  box-shadow: 0 2px 12px rgba(0,0,0,0.07);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: baseline;
  gap: 0.15em;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
}
.logo-mark {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-brand);
}
.logo-text {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-heading);
  letter-spacing: 0.12em;
}
.logo-img {
  display: block;
  height: 40px;
  width: auto;
  max-width: 160px;
}

/* Nav */
.main-nav ul {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}
.main-nav a {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
}
.main-nav .nav-cta {
  border: 1px solid var(--color-heading);
  padding: 0.45em 1.1em;
  border-radius: 0;
  transition: background 0.2s, color 0.2s;
}
.main-nav .nav-cta:hover {
  background: var(--color-heading);
  color: var(--color-bg);
  border-bottom-color: transparent;
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  touch-action: manipulation;
}
.menu-toggle span {
  display: block;
  width: 28px;
  height: 1.5px;
  background: var(--color-heading);
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ===================================
   HERO
   =================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1a1f2e 0%, #2d3748 50%, #374151 100%);
  z-index: 0;
}
/* Cuadrícula sutil */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* --- Bloque de texto: centrado, ocupa el espacio disponible --- */
.hero-text-block {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: calc(var(--header-h) + var(--space-lg));
  padding-bottom: var(--space-lg);
}
.hero-text-block .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-bg-alt);
  margin-bottom: var(--space-md);
}
.hero-title {
  font-size: clamp(2.6rem, 5vw, 5rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  margin-bottom: var(--space-md);
}
.hero-subtitle {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-bg-alt);
  margin-bottom: var(--space-lg);
  max-width: 44ch;
}

/* ===================================
   CARRUSEL — UNA IMAGEN A LA VEZ
   =================================== */

.hero-carousel {
  position: relative;
  z-index: 1;
  /* Centrado, ancho máximo elegante, margen lateral en móvil */
  width: min(800px, calc(100% - 2rem));
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  flex-shrink: 0;
}

/* Contenedor de slides: proporción 16:9 pura — el ancho del padre controla el tamaño */
.carousel-slides-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  /* Fondo neutro para que el dark-grid no se vea durante el crossfade */
  background: #1e2535;
}

/* Cada slide ocupa todo el contenedor, invisible por defecto */
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.4s ease-in-out;
}
.carousel-slide.active { opacity: 1; }

/* ── HOVER ZOOM ──────────────────────────────────────────
   El inner escala; overflow:hidden del wrap lo recorta.
──────────────────────────────────────────────────────── */
.carousel-slide-inner {
  width: 100%;
  height: 100%;
  /* Color de placeholder uniforme — se sobreescribe con background-image real */
  background-color: #3d4f66;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 0.5s ease-in-out;
}
.hero-carousel:hover .carousel-slide.active .carousel-slide-inner {
  transform: scale(1.05);
}

/* Barra de controles: dots + contador */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
}

.carousel-nav {
  display: flex;
  gap: 7px;
  align-items: center;
}
.carousel-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.3s ease, transform 0.3s ease;
}
.carousel-dot.active {
  background: #FFFFFF;
  transform: scale(1.5);
}

/* Contador 01 / 06 */
.carousel-counter {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.45);
}
.carousel-current { color: #FFFFFF; }

/* ===================================
   BOTONES
   =================================== */
.btn {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8em 2em;
  border: 1px solid;
  transition: background 0.25s, color 0.25s;
}
.btn-light {
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.6);
}
.btn-light:hover {
  background: #FFFFFF;
  color: var(--color-heading);
  border-color: #FFFFFF;
}
.btn-dark {
  color: var(--color-heading);
  border-color: var(--color-heading);
}
.btn-dark:hover {
  background: var(--color-heading);
  color: #FFFFFF;
}

/* ===================================
   SECCIONES — BASE
   =================================== */
.section {
  padding-block: var(--space-xl);
}
.section--alt {
  background: #F8F9FA;
}
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  position: relative;
}
.section-header::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  height: 1px;
  width: 0;
  background: var(--color-border);
  transition: width 0.9s ease 0.4s;
}
.section-header.visible::after {
  width: 100%;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--color-heading);
}
.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-meta);
  margin-bottom: var(--space-sm);
}
.section-link {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-brand);
  transition: opacity 0.2s;
}
.section-link:hover { opacity: 0.7; }

/* ===================================
   PROYECTOS GRID
   =================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.project-card-link {
  display: block;
  color: inherit;
}
.project-card {
  overflow: hidden;
}
.project-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background-color: var(--color-bg-alt);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), filter 0.5s ease;
}
.project-card-link:hover .project-img {
  transform: scale(1.04);
  filter: brightness(0.9);
}
.project-title {
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-heading);
  margin-bottom: 0.3rem;
}
.project-meta {
  font-size: 0.78rem;
  color: var(--color-meta);
  letter-spacing: 0.04em;
}

/* Placeholders de imagen (temporales hasta tener fotos reales) */
.placeholder-img {
  background: var(--color-bg-alt);
}
.placeholder-img--2 { background: #B8C4D4; }
.placeholder-img--3 { background: #A0ADBF; }
.placeholder-img--4 {
  background: #B8C4D4;
  min-height: 380px;
  flex-shrink: 0;
}

/* ===================================
   SOBRE NOSOTROS TEASER
   =================================== */
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}
.about-text .section-title {
  margin-bottom: var(--space-md);
}
.about-body {
  color: var(--color-brand-alt);
  margin-bottom: var(--space-md);
  max-width: 48ch;
  line-height: 1.75;
}

/* ===================================
   SERVICIOS
   =================================== */
.services-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}
.service-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}
.service-item:nth-child(odd) {
  padding-right: var(--space-lg);
  border-right: 1px solid var(--color-border);
}
.service-item:nth-child(even) {
  padding-left: var(--space-lg);
}
.service-item:nth-last-child(-n+2) {
  border-bottom: none;
}
.service-num {
  font-size: 0.72rem;
  color: var(--color-meta);
  letter-spacing: 0.1em;
  padding-top: 0.25rem;
  flex-shrink: 0;
}
.service-title {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: 0.4rem;
}
.service-desc {
  font-size: 0.88rem;
  color: var(--color-brand-alt);
  line-height: 1.65;
}

/* ===================================
   CONTACTO CTA
   =================================== */
.contact-cta {
  text-align: center;
  max-width: 600px;
}
.contact-cta-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 300;
  color: var(--color-heading);
  margin-bottom: var(--space-sm);
}
.contact-cta-body {
  color: var(--color-brand-alt);
  margin-bottom: var(--space-md);
}

/* ===================================
   FOOTER
   =================================== */
.site-footer {
  background: var(--color-heading);
  color: rgba(255,255,255,0.75);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  align-items: center;
  padding-block: var(--space-lg);
}
.logo--footer .logo-mark { color: var(--color-bg-alt); }
.logo--footer .logo-text { color: rgba(255,255,255,0.85); }
.footer-tagline {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.06em;
  margin-top: 0.35rem;
}
.footer-nav ul {
  display: flex;
  gap: var(--space-md);
}
.footer-nav a {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer-nav a:hover { color: #FFFFFF; }
.footer-contact {
  text-align: right;
}
.footer-contact p {
  font-size: 0.85rem;
  line-height: 1.8;
}
.footer-contact a {
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}
.footer-contact a:hover { color: #FFFFFF; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  padding-block: var(--space-sm);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a {
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}
.footer-bottom a:hover { color: rgba(255,255,255,0.85); }

/* ===================================
   RESPONSIVE
   =================================== */

/* Tablet */
@media (max-width: 900px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-inner {
    grid-template-columns: 1fr;
  }
  .about-img { display: none; }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    text-align: center;
  }
  .footer-contact { text-align: center; }
  .footer-nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* Móvil */
@media (max-width: 640px) {
  :root {
    --space-xl: 4rem;
    --space-lg: 2.5rem;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: transform 0.35s ease, opacity 0.35s ease, visibility 0s linear 0.35s;
    z-index: 99;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transition: transform 0.35s ease, opacity 0.35s ease, visibility 0s linear 0s;
  }
  .main-nav ul {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }
  .main-nav a {
    font-size: 1rem;
  }
  .menu-toggle { display: flex; }

  .projects-grid {
    grid-template-columns: 1fr;
  }
  .services-list {
    grid-template-columns: 1fr;
  }
  .service-item:nth-child(odd) {
    padding-right: 0;
    border-right: none;
  }
  .service-item:nth-child(even) {
    padding-left: 0;
  }
  .service-item:nth-last-child(-n+2) {
    border-bottom: 1px solid var(--color-border);
  }
  .service-item:last-child {
    border-bottom: none;
  }
  .footer-bottom .container {
    flex-direction: column;
    gap: 0.3rem;
    text-align: center;
  }
}