/* ============================================
   MIXCOAC RESIDENCIAL - Styles
   ============================================ */

/* --- Variables --- */
:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F3F0;
  --color-accent: #8B5E3C;
  --color-accent-hover: #6D4A2E;
  --color-text: #1A1A1A;
  --color-text-light: #666666;
  --color-text-inverse: #FFFFFF;
  --color-border: #E0DCD6;

  --font-heading: 'Roboto Slab', Georgia, serif;
  --font-body: 'Montserrat', 'Helvetica Neue', sans-serif;

  --header-height: 70px;
  --header-height-expanded: 110px;
  --top-bar-height: 0px;
  --max-width: 1200px;

  --transition: 0.3s ease;
}

/* --- Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--top-bar-height) + 10px);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Zoomable images --- */
.casas__zoomable {
  cursor: zoom-in;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(139, 94, 60, 0.3);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
  text-align: center;
}

/* ============================================
   HEADER / NAVBAR
   ============================================ */
.header {
  position: fixed;
  top: var(--top-bar-height);
  left: 0;
  right: 0;
  height: var(--header-height-expanded);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0) 100%);
  z-index: 1000;
  transition: height 0.4s ease, background 0.4s ease, border-bottom-color 0.4s ease, box-shadow 0.4s ease;
  border-bottom: none;
}

.header--scrolled {
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

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

.header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.header__logo-img {
  height: 125px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: height 0.4s ease, filter 0.4s ease;
}

.header--scrolled .header__logo-img {
  height: 50px;
  filter: none;
}

.header__nav-logo,
.header__nav-footer {
  display: none;
}

.header__menu {
  display: flex;
  gap: 32px;
}

.header__link {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-text-inverse);
  position: relative;
  transition: color var(--transition);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.header--scrolled .header__link {
  color: var(--color-text);
  text-shadow: none;
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.header__link:hover,
.header__link--active {
  color: rgba(255, 255, 255, 0.8);
}

.header--scrolled .header__link:hover,
.header--scrolled .header__link--active {
  color: var(--color-accent);
}

.header__link:hover::after,
.header__link--active::after {
  width: 100%;
}

/* Hamburger */
.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-inverse);
  transition: all var(--transition);
}

.header--scrolled .header__hamburger span {
  background: var(--color-text);
}

.header__hamburger--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__hamburger--active span:nth-child(2) {
  opacity: 0;
}

.header__hamburger--active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-top: var(--top-bar-height);
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 80%;
  opacity: 0;
  transform: scale(1);
  transition: opacity 1.5s ease-in-out;
}

.hero__bg--active {
  opacity: 1;
  animation: heroZoomIn 5s ease-out forwards;
}

.hero__bg--leaving {
  opacity: 0;
  transform: scale(1.12);
}

@keyframes heroZoomIn {
  from { transform: scale(1); }
  to   { transform: scale(1.12); }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10, 8, 6, 0.72) 0%, rgba(10, 8, 6, 0.25) 70%, rgba(10, 8, 6, 0.1) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 650px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 500;
  line-height: 1.15;
  color: var(--color-text-inverse);
  margin-bottom: 24px;
  text-wrap: balance;
}

.hero__text {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  font-weight: 300;
}

.hero__text strong {
  color: var(--color-text-inverse);
  font-weight: 600;
}

.hero__price {
  font-family: var(--font-heading);
  font-size: clamp(17px, 2.4vw, 25px);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
  letter-spacing: 1px;
}

.hero__price span {
  color: var(--color-text-inverse);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================
   SECTIONS - General
   ============================================ */
.section {
  padding: 100px 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 500;
  text-align: center;
  margin-bottom: 16px;
  color: var(--color-text);
  text-wrap: balance;
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 16px;
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section__text {
  color: var(--color-text-light);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.8;
  max-width: 700px;
}

/* ============================================
   PROYECTO
   ============================================ */
.proyecto__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.section__title--left {
  text-align: left;
}

.proyecto__desc .section__text {
  margin-top: 20px;
}

.proyecto__bullets {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 32px;
}

.proyecto__bullets li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

.bullet__icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

.proyecto__bullets-sub {
  font-weight: 400;
  font-size: 14px;
  color: var(--color-text-light);
}

/* Proyecto Slider */
.proyecto__slider {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
}

.proyecto__slider-track {
  display: flex;
  transition: transform 0.5s ease;
}

.proyecto__slide {
  min-width: 100%;
}

.proyecto__slide img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}

.proyecto__slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all var(--transition);
  z-index: 2;
}

.proyecto__slider-btn:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.proyecto__slider-btn--prev {
  left: 12px;
}

.proyecto__slider-btn--next {
  right: 12px;
}

/* ============================================
   CONFIGURACIÓN DEL PROYECTO
   ============================================ */
.configuracion__tipos {
  text-align: center;
  margin-bottom: 16px;
}

.configuracion__tipos p {
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.8;
}

.configuracion__img {
  max-width: 700px;
  margin: 0 auto 32px;
}

.configuracion__card {
  padding: 16px 20px;
  border: 1px solid rgba(139, 94, 60, 0.15);
  border-radius: 8px;
}

.configuracion__num {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.configuracion__card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.configuracion__card p strong {
  color: var(--color-text);
  font-weight: 700;
}

.configuracion__price {
  margin-top: 8px !important;
  color: var(--color-accent) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
}


.configuracion__map {
  position: relative;
  width: 100%;
}

.configuracion__map img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

.configuracion__marker {
  position: absolute;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.3s ease;
  transform: translate(-50%, -50%);
}

.configuracion__marker.is-active {
  background: var(--color-accent);
  border-color: #fff;
  color: #fff;
  transform: translate(-50%, -50%) scale(1.3);
  box-shadow: 0 0 16px rgba(139, 94, 60, 0.5);
}

.configuracion__card.is-active {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(139, 94, 60, 0.15);
}

/* Slider de cards */
.configuracion__slider {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 1000px;
  margin: 0 auto;
  padding-bottom: 40px;
}

.configuracion__slider-viewport {
  overflow: hidden;
  flex: 1;
}

.configuracion__slider-track {
  display: flex;
  gap: 12px;
  transition: transform 0.4s ease;
}

.configuracion__slider-track .configuracion__card {
  min-width: calc((100% - 36px) / 4);
  flex-shrink: 0;
  box-sizing: border-box;
  padding: 16px 20px;
}

.configuracion__arrow {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  transition: all var(--transition);
}

.configuracion__arrow:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.configuracion__slider-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  position: absolute;
  bottom: -32px;
  left: 50%;
  transform: translateX(-50%);
}

.configuracion__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition);
}

.configuracion__dot--active {
  background: var(--color-accent);
}


/* ============================================
   CASAS
   ============================================ */
.casas__tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
}

.casas__tab {
  padding: 12px 32px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  transition: all var(--transition);
}

.casas__tab:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.casas__tab--active {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.casas__content {
  display: none;
}

.casas__content--active {
  display: block;
  animation: fadeIn 0.4s ease;
}

.casas__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.casas__plans {
  text-align: center;
}

/* Casas Image Slider */
.casas__img-slider {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
}

.casas__img-track {
  display: flex;
  transition: transform 0.5s ease;
}

.casas__img-slide {
  min-width: 100%;
}

.casas__img-slide img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  cursor: zoom-in;
}

.casas__img-slide:first-child img {
  object-fit: contain;
}

.casas__img-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all var(--transition);
  z-index: 2;
}

.casas__img-btn:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.casas__img-btn--prev { left: 12px; }
.casas__img-btn--next { right: 12px; }

/* Image Zoom Modal */
.img-modal {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.img-modal--open {
  opacity: 1;
  visibility: visible;
}

.img-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(6px);
}

.img-modal__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  transform: scale(0.9);
  transition: transform var(--transition);
}

.img-modal--open .img-modal__content {
  transform: scale(1);
}

.img-modal__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  display: block;
}

.img-modal__close {
  position: absolute;
  top: -40px;
  right: 0;
  padding: 8px;
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
}

.img-modal__close:hover {
  color: #fff;
}

.casas__disclaimer {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 16px;
  font-style: italic;
}

.casas__header-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.casas__name {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
}

.casas__size {
  font-size: 14px;
  color: var(--color-text-light);
  font-weight: 400;
}

.casas__specs {
  margin-bottom: 24px;
  columns: 2;
  column-gap: 24px;
}

.casas__spec-group {
  margin-bottom: 8px;
  break-inside: avoid;
}

.casas__spec-group h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
  color: var(--color-accent);
}

.casas__spec-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 0;
}

.casas__spec-group li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--color-text-light);
  width: 100%;
  line-height: 1.6;
}

.casas__spec-group li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

.casas__price {
  font-size: 20px;
  color: var(--color-accent);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.casas__price strong {
  font-size: 24px;
  font-weight: 700;
}

/* ============================================
   ACABADOS
   ============================================ */
/* Bloque 1: Showcase */
.acabados__showcase {
  margin-bottom: 64px;
}

.acabados__showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
}

.acabados__showcase-item {
  border-radius: 8px;
  overflow: hidden;
}

.acabados__showcase-item--main {
  grid-row: 1 / 3;
}

.acabados__showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.acabados__showcase-item:hover img {
  transform: scale(1.03);
}

/* Bloque 2: Menu interactivo */
.acabados__tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.acabados__tab {
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition);
  border-radius: 4px;
}

.acabados__tab:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.acabados__tab--active {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.acabados__panel {
  display: none;
}

.acabados__panel--active {
  display: block;
}

.acabados__panel-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.acabados__panel-img {
  border-radius: 8px;
  overflow: hidden;
}

.acabados__panel-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.acabados__panel-info h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}

.acabados__panel-tipo {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.acabados__panel-list {
  list-style: none;
  padding: 0;
}

.acabados__panel-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 2;
}

.acabados__panel-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ============================================
   AVANCE DE OBRA
   ============================================ */
.avance__slider {
  position: relative;
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}

.avance__track {
  display: flex;
  transition: transform 0.5s ease;
}

.avance__slide {
  min-width: 100%;
}

.avance__slide img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.avance__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all var(--transition);
  z-index: 2;
}

.avance__btn:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.avance__btn--prev {
  left: 16px;
}

.avance__btn--next {
  right: 16px;
}

/* ============================================
   UBICACIÓN
   ============================================ */
.ubicacion__map {
  margin-top: 32px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.ubicacion__map iframe {
  display: block;
}

/* ============================================
   CONTACTO
   ============================================ */
.contacto__layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.contacto__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form__group label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-text);
}

.form__group input,
.form__group textarea {
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
  outline: none;
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-accent);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: #bbb;
}

.form__group textarea {
  resize: vertical;
}

.contacto__info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 12px;
}

.contacto__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contacto__item svg {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

.contacto__item strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contacto__item p {
  font-size: 14px;
  color: var(--color-text-light);
}

.contacto__item a {
  color: var(--color-accent);
}

/* Social Links */
.contacto__social {
  margin-top: 8px;
}

.contacto__social strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all var(--transition);
}

.social-link:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.social-link--disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: 60px 0 32px;
}

.footer__inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer__logo-img {
  height: 80px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

.footer__dev {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer__dev-logo {
  height: 48px;
  width: auto;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.footer__dev-logo:hover {
  opacity: 1;
}

.footer__nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin: 32px 0;
  flex-wrap: wrap;
}

.footer__nav a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.5px;
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: var(--color-text-inverse);
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.social-link--footer {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
}

.social-link--footer:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

.footer__seo {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
  max-width: 600px;
  margin: 0 auto 24px;
  line-height: 1.6;
}

.footer__copy {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}

.footer__powered {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.25);
  margin-top: 12px;
}

.footer__powered a {
  color: rgba(255, 255, 255, 0.4);
  text-decoration: underline;
  transition: color var(--transition);
}

.footer__powered a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   MODAL
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal--open {
  opacity: 1;
  visibility: visible;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal__content {
  position: relative;
  background: var(--color-bg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 48px 40px;
  transform: translateY(20px);
  transition: transform var(--transition);
}

.modal--open .modal__content {
  transform: translateY(0);
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 8px;
  color: var(--color-text-light);
  transition: color var(--transition);
}

.modal__close:hover {
  color: var(--color-text);
}

.modal__icon {
  text-align: center;
  margin-bottom: 16px;
}

.modal__logo {
  height: 80px;
  width: auto;
  display: block;
  margin: 0 auto;
}

.modal__title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 500;
  margin-bottom: 8px;
}

.modal__subtitle {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 28px;
  font-weight: 300;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0) translateX(0);
}

.reveal--left {
  transform: translateX(-50px);
}

.reveal--right {
  transform: translateX(50px);
}

.reveal--scale {
  transform: scale(0.9);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Reveal features (bidirectional) */
.reveal-feature {
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: calc(var(--delay, 0) * 0.15s);
}

.reveal-feature--visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

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

/* Tablet */
@media (max-width: 1024px) {
  .proyecto__layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section__title--left {
    text-align: center;
  }

  .proyecto__desc .section__text {
    text-align: center;
    margin: 20px auto 0;
  }

  .casas__layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .casas__slides img {
    max-height: 400px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --header-height: 130px;
    --header-height-expanded: 130px;
  }

  .header--scrolled {
    --header-height: 60px;
  }

  .header__inner {
    flex-direction: column;
    justify-content: center;
    position: relative;
  }

  .header--scrolled .header__inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .header__hamburger {
    display: flex;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
  }

  .header--scrolled .header__hamburger {
    position: static;
    transform: none;
  }

  .header__nav {
    position: fixed;
    top: calc(var(--top-bar-height) + var(--header-height));
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
    padding: 32px 24px;
  }

  .header__nav--open {
    opacity: 1;
    visibility: visible;
  }

  .header__nav-logo {
    display: block;
  }

  .header__nav-logo img {
    height: 60px;
  }

  .header__menu {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .header__link {
    font-size: 18px;
  }

  .header__nav--open .header__link {
    color: var(--color-text);
    text-shadow: none;
  }

  .header__nav--open .header__link:hover,
  .header__nav--open .header__link--active {
    color: var(--color-accent);
  }

  .header--scrolled.header--menu-open,
  .header--scrolled:has(.header__nav--open) {
    background: #fff;
    backdrop-filter: none;
  }

  .header__nav-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    width: 100%;
  }

  .header__nav-contact {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-light);
    line-height: 1.8;
  }

  .header__nav-contact a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
  }

  .header__nav-social {
    display: flex;
    gap: 12px;
  }

  .header__logo-img {
    height: 120px;
  }

  .header--scrolled .header__logo-img {
    height: 45px;
  }

  .hero {
    min-height: 500px;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__text {
    font-size: 15px;
  }

  .section {
    padding: 64px 0;
  }

  .proyecto__bullets {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 16px;
  }

  .casas__tabs {
    flex-wrap: wrap;
  }

  .casas__tab {
    padding: 10px 24px;
    font-size: 13px;
  }

  .casas__layout {
    grid-template-columns: 1fr;
  }

  .casas__specs {
    columns: 1;
  }

  .acabados__showcase-grid {
    grid-template-columns: 1fr;
  }

  .acabados__showcase-item--main {
    grid-row: auto;
  }

  .acabados__panel-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contacto__layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__nav {
    gap: 16px;
  }

  .modal__content {
    padding: 32px 24px;
  }

  .configuracion__slider-track .configuracion__card {
    min-width: calc((100% - 12px) / 2);
  }

  .configuracion__arrow {
    display: none;
  }

}

@media (max-width: 480px) {
  .proyecto__bullets {
    grid-template-columns: 1fr;
  }

  .acabados__tab {
    font-size: 11px;
    padding: 8px 12px;
  }
}

/* ── Botón flotante WhatsApp ── */
.whatsapp-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  z-index: 9999;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}