/* ============================================================
   LINEA VERTICAL — main.css
   Mobile-first. Breakpoints: 640px (sm), 768px (md), 1024px (lg), 1200px (xl)
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.75;
}

ul, ol {
  list-style: none;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ── Tipografía ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(var(--text-3xl), 5vw, var(--text-6xl)); }
h2 { font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl)); }
h3 { font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }

p {
  max-width: 65ch;
}

.text-muted {
  color: var(--color-text-muted);
}

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

.text-small {
  font-size: var(--text-sm);
}

.overline {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ── Botones ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), opacity var(--transition);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  opacity: 1;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-accent-inv);
  border: 1.5px solid var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-text);
}

.btn--outline:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-bg);
  border: 1.5px solid rgba(255,255,255,0.6);
}

.btn--outline-light:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-bg);
}

.btn--wa {
  background-color: var(--color-wa-green);
  color: #ffffff;
  border: 1.5px solid var(--color-wa-green);
}

.btn--wa:hover {
  background-color: var(--color-wa-green-dark);
  border-color: var(--color-wa-green-dark);
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--text-xs);
}

.btn--lg {
  padding: 1.125rem 2.25rem;
  font-size: var(--text-base);
}

/* ── Header / Navegación ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  gap: 0;
}

.site-logo__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  line-height: 1.1;
}

/* Menú de navegación */
.site-nav__list {
  display: none; /* mobile: oculto hasta que se abre */
  flex-direction: column;
  position: fixed;
  inset: 68px 0 0;
  background-color: var(--color-bg);
  padding: 2rem var(--gutter);
  gap: 0;
  border-top: 1px solid var(--color-border);
  overflow-y: auto;
}

.site-nav__list.is-open {
  display: flex;
}

.site-nav__list .menu-item a {
  display: block;
  padding: 1rem 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 300;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
  transition: padding-left var(--transition);
}

.site-nav__list .menu-item a:hover,
.site-nav__list .menu-item.current-menu-item a {
  padding-left: 0.5rem;
  opacity: 1;
}

.site-nav__list .menu-item.current-menu-item a {
  font-weight: 500;
}

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

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .site-nav__list {
    display: flex;
    flex-direction: row;
    align-items: center;
    position: static;
    inset: auto;
    background: none;
    padding: 0;
    gap: 2.5rem;
    border: none;
    overflow: visible;
  }

  .site-nav__list .menu-item a {
    padding: 0;
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: none;
    transition: opacity var(--transition);
  }

  .site-nav__list .menu-item a:hover {
    padding-left: 0;
    opacity: 0.5;
  }

  .site-nav__list .menu-item.current-menu-item a {
    opacity: 0.5;
    padding-left: 0;
  }
}

/* ── Sección genérica ── */
.section {
  padding-block: var(--section-gap);
}

.section__header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section__header p {
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

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

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

/* ── HOME: Hero ── */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-surface-dark);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-color: #1a1a1a;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-block: clamp(4rem, 10vw, 8rem);
  color: var(--color-bg);
  max-width: 700px;
}

.hero__content .overline {
  color: rgba(255,255,255,0.6);
  margin-bottom: 1.25rem;
  display: block;
}

.hero__title {
  font-size: clamp(2rem, 5.5vw, 4.5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 1.75rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

/* ── HOME: Servicios ── */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--card-gap);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  padding: 2rem;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  border-color: var(--color-text);
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.service-card__number {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
}

.service-card__title {
  font-size: var(--text-xl);
  font-weight: 500;
}

.service-card__desc {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  flex: 1;
}

.service-card__link {
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-heading);
  letter-spacing: 0.05em;
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-top: auto;
}

/* ── HOME: Proyectos seleccionados ── */
.projects-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--card-gap);
}

@media (min-width: 768px) {
  .projects-featured {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface);
  aspect-ratio: 4/3;
}

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__img {
  transform: scale(1.04);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 55%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.75rem;
  color: white;
}

.project-card__tipo {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.75;
  margin-bottom: 0.4rem;
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: 1.2;
}

.project-card__meta {
  font-size: var(--text-xs);
  opacity: 0.65;
  margin-top: 0.25rem;
}

/* ── HOME: Banner Showroom ── */
.showroom-banner {
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface);
  min-height: 400px;
  display: flex;
  align-items: center;
}

.showroom-banner__bg {
  position: absolute;
  inset: 0;
}

.showroom-banner__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showroom-banner__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.52);
}

.showroom-banner__content {
  position: relative;
  z-index: 2;
  padding-block: 5rem;
}

.showroom-banner__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  font-weight: 300;
  margin-bottom: 1rem;
  color: #ffffff;
}

.showroom-banner__desc {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-lg);
  margin-bottom: 2rem;
}

/* ── HOME: CTA Final ── */
.cta-section {
  text-align: center;
  padding-block: var(--section-gap);
}

.cta-section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  font-weight: 300;
  margin-bottom: 1rem;
}

.cta-section__desc {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  margin-bottom: 2.5rem;
  margin-inline: auto;
}

/* ── Divisor ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 0;
}

/* ── Página interna: hero ── */
.page-hero {
  padding-block: clamp(3rem, 7vw, 6rem);
  border-bottom: 1px solid var(--color-border);
}

.page-hero__overline {
  margin-bottom: 1rem;
}

.page-hero__title {
  font-weight: 300;
  letter-spacing: -0.03em;
}

.page-hero__desc {
  margin-top: 1rem;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 55ch;
}

/* ── Servicios ── */
.services-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding-block: clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .service-item {
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
  }
}

.service-item__label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-light);
  padding-top: 0.25rem;
}

.service-item__body h3 {
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl));
  font-weight: 400;
  margin-bottom: 1rem;
}

.service-item__body p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

/* ── Proyectos: grilla ── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--card-gap);
}

@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ── Contacto ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(3rem, 6vw, 5rem);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact-info__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

.contact-info__value {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.contact-info__value a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── Formulario de contacto ── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-field label {
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: border-color var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--color-text);
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-feedback {
  padding: 1rem;
  border-radius: var(--radius);
  font-size: var(--text-sm);
}

.form-feedback--success {
  background-color: #d1fae5;
  color: #065f46;
}

.form-feedback--error {
  background-color: #fee2e2;
  color: #991b1b;
}

/* ── Footer ── */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  padding-block: clamp(3rem, 6vw, 5rem);
}

@media (min-width: 768px) {
  .site-footer__inner {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 4rem;
  }
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.75rem;
}

.site-footer__tagline {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 28ch;
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.site-footer__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.site-footer__nav a:hover {
  color: var(--color-text);
  opacity: 1;
}

.site-footer__contact p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.site-footer__contact a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer__social {
  margin-top: 0.75rem;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: 1.25rem;
}

.site-footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  max-width: none;
}

/* ── Paginación ── */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  margin-top: 3rem;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding-inline: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.pagination a:hover {
  background-color: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
  opacity: 1;
}

.pagination .current {
  background-color: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

/* ── Imagen placeholder ── */
.img-placeholder {
  background-color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: var(--text-sm);
  font-family: var(--font-heading);
  letter-spacing: 0.05em;
}

/* ── Lazy load fade-in ── */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.4s ease;
}

img[loading="lazy"].loaded {
  opacity: 1;
}