/*
  Estilos principales para Construcciones Manuel Navarro
  Autor: [Tu Nombre]
  Descripción: Estilo moderno, profesional y responsive
*/

:root {
  --azul-corporativo: #0a4c8b;
  --azul-oscuro: #07396a;
  --azul-claro: #1976d2;
  --blanco: #fff;
  --gris-claro: #f4f6fa;
  --fuente-principal: 'Montserrat', Arial, Helvetica, sans-serif;
}

html {
  scroll-behavior: smooth;
  text-decoration: none;
}

body {
  margin: 0;
  font-family: var(--fuente-principal);
  background: var(--azul-corporativo);
  color: var(--blanco);
  min-height: 100vh;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  background: var(--azul-oscuro);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header__container {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 80px;
}
.header__logo-link {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  display: flex;
  align-items: center;
}
.header__logo {
  height: 60px;
  width: auto;
  display: block;
}
.header__nav {
  margin-left: auto;
  display: flex;
  gap: 2rem;
  z-index: 1;
}
.header__nav a {
  color: var(--blanco);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.2s;
  padding: 0.5rem 0;
}
.header__nav a:hover {
  color: var(--azul-claro);
}
.header__menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
}
.header__menu-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blanco);
  position: relative;
  transition: background 0.3s;
}
.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--blanco);
  transition: transform 0.3s;
}
.header__menu-icon::before {
  top: -8px;
}
.header__menu-icon::after {
  bottom: -8px;
}
.header__menu-btn[aria-expanded="true"] .header__menu-icon {
  background: transparent;
}
.header__menu-btn[aria-expanded="true"] .header__menu-icon::before {
  transform: rotate(45deg);
  top: 0;
}
.header__menu-btn[aria-expanded="true"] .header__menu-icon::after {
  transform: rotate(-45deg);
  bottom: 0;
}

.hero {
  background: var(--azul-corporativo);
  background-image: url(assets/hero.webp);
  background-blend-mode: multiply;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  min-height: 60vh;
  text-align: center;
  padding: 4rem 0 2rem 0;
}
.hero__content h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.hero__content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}
.btn {
  display: inline-block;
  padding: 0.8em 2em;
  border-radius: 30px;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}
.btn--primary {
  background: var(--azul-claro);
  color: var(--blanco);
}
.btn--primary:hover {
  background: var(--blanco);
  color: var(--azul-corporativo);
}

.intro {
  background: var(--blanco);
  color: var(--azul-corporativo);
  padding: 4rem 0;
}
.intro__container {
  display: flex;
  gap: 4rem;
  align-items: center;
}
.intro__content {
  flex: 1;
}
.intro__content h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--azul-oscuro);
}
.intro__content p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--azul-corporativo);
}
.intro__image {
  flex: 1;
  position: relative;
}
.intro__image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(10,76,139,0.15);
}

.featurettes {
  background: var(--gris-claro);
  padding: 4rem 0;
}
.featurettes h2 {
  text-align: center;
  color: var(--azul-oscuro);
  font-size: 2rem;
  margin-bottom: 3rem;
}
.featurettes__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}
.featurette {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding: 1.5rem;
  background: var(--blanco);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(10,76,139,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.featurette:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10,76,139,0.12);
}
.featurette__icon {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--azul-corporativo);
  border-radius: 12px;
  padding: 1rem;
}
.featurette__icon img {
  width: 100%;
  height: 100%;
  filter: brightness(0) invert(1);
}
.featurette__content {
  flex: 1;
}
.featurette__content h3 {
  color: var(--azul-oscuro);
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
}
.featurette__content p {
  color: var(--azul-corporativo);
  margin: 0;
  line-height: 1.6;
}

.servicios {
  background: var(--blanco);
  color: var(--azul-corporativo);
  padding: 4rem 0 2rem 0;
}
.servicios__grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}
.servicio-card {
  background: var(--gris-claro);
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(10,76,139,0.08);
  padding: 2rem 1.5rem;
  flex: 1 1 250px;
  max-width: 320px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
  opacity: 0;
  transform: translateY(40px);
  will-change: transform, opacity;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.servicio-card__icon {
  width: 64px;
  height: 64px;
  margin-bottom: 1.5rem;
  display: block;
}
.servicio-card h3 {
  margin: 0.5rem 0 1rem 0;
}
.servicio-card p {
  font-size: 1rem;
}
.servicio-card.visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s, transform 0.7s;
}

.proyectos {
  background: var(--azul-corporativo);
  padding: 4rem 0 2rem 0;
}
.proyectos__slider {
  position: relative;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}
.slider__images {
  position: relative;
  width: 100%;
  height: 400px;
  display: flex;
  transition: transform 0.5s ease-in-out;
}
.slider__image {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
.slider__image.active {
  opacity: 1;
}
.slider__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.7);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
  z-index: 2;
}
.slider__btn:hover {
  background: rgba(255, 255, 255, 0.9);
}
.slider__btn--prev {
  left: 10px;
}
.slider__btn--next {
  right: 10px;
}

.contacto {
  background: var(--blanco);
  color: var(--azul-corporativo);
  padding: 4rem 0 2rem 0;
}
.contacto__container {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  align-items: flex-start;
  justify-content: space-between;
}
.contacto__info {
  flex: 1 1 300px;
  min-width: 260px;
}
.contacto__form {
  flex: 1 1 320px;
  min-width: 260px;
  background: var(--gris-claro);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  box-shadow: 0 2px 8px rgba(10,76,139,0.08);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contacto__form label {
  font-weight: 700;
}
.contacto__form input,
.contacto__form textarea {
  border: 1px solid var(--azul-claro);
  border-radius: 8px;
  padding: 0.7em;
  font-size: 1rem;
  font-family: var(--fuente-principal);
  margin-bottom: 0.5rem;
}
.contacto__form input:focus,
.contacto__form textarea:focus {
  outline: 2px solid var(--azul-claro);
}
.form__mensaje {
  min-height: 1.5em;
  color: var(--azul-claro);
  font-weight: 700;
  margin-top: 0.5em;
}
.contacto__mapa {
  margin-top: 1.5rem;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(10,76,139,0.08);
}

.footer {
  background: var(--azul-oscuro);
  color: var(--blanco);
  padding: 2rem 0 1rem 0;
  text-align: center;
}
.footer__container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.footer__info {
  flex: 1 1 30px;
}
.footer__redes {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}
.footer__red img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);
  transition: filter 0.2s;
}
.footer__red:hover img {
  filter: brightness(0.7) invert(0.7) sepia(1) hue-rotate(180deg);
}

.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 200;
  background: #25d366;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  padding: 0.7em;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.whatsapp-float img {
  width: 40px;
  height: 40px;
}
.whatsapp-float:hover {
  background: #128c7e;
}

/* Responsive */
@media (max-width: 900px) {
  .servicios__grid, .footer__container, .contacto__container, .intro__container {
    flex-direction: column;
    align-items: center;
  }
  .header__container {
    flex-direction: column;
    gap: 1rem;
  }
  .intro__content {
    text-align: center;
    margin-bottom: 2rem;
  }
  .intro__image {
    max-width: 600px;
  }
  .footer__container {
    gap: 0.5rem;
  }
  .footer__info {
    margin-bottom: 0.5rem;
    text-align: center;
  }
  .footer__redes {
    margin-top: 0;
    gap: 1rem;
    justify-content: center;
  }
  .header__nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--azul-oscuro);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    transition: left 0.3s ease;
    left: -100vw;
    z-index: 102;
    padding: 0;
  }
  .header__nav.active {
    left: 0;
  }
  .header__nav a {
    font-size: 1.5rem;
    padding: 1rem 0;
  }
  .header__menu-btn {
    right: 42px;
    display: block;
    z-index: 9999 !important;
    position: fixed;
    top: 60px;
  }
}
@media (max-width: 600px) {
  .hero__content h1 {
    font-size: 1.5rem;
  }
  .container {
    width: 98%;
    padding-left: 16px;
    padding-right: 16px;
    box-sizing: border-box;
  }
  .servicio-card, .contacto__form {
    padding: 1rem;
  }
  .featurette {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem 1rem;
  }
  .featurette__icon {
    margin-bottom: 1rem;
  }
  .cta__title {
    font-size: 2rem;
    text-align: center;
  }
  .cta__text {
    font-size: 1.1rem;
    text-align: center;
  }
  .btn--cta {
    font-size: 1rem;
    padding: 0.8em 2em;
  }
  .slider__btn {
    width: 32px;
    height: 32px;
    font-size: 1.3rem;
  }
  h2, .servicios h2, .proyectos h2, .contacto h2, .featurettes h2, .intro h2 {
    text-align: center !important;
    width: 100%;
  }
  h3 {
    text-align: center;
    width: 100%;
  }

  .btn--llamanos .llamanos-text {
    display: none;
  }
  .btn--llamanos .llamanos-icon {
    display: inline-block !important;
  }
  .btn--llamanos {
    min-width: 44px;
    min-height: 44px;
    padding: 0.6em 0.7em;
    justify-content: center;
    align-items: center;
    display: flex;
  }
  .servicios h2, .proyectos h2, .contacto h2 {
    text-align: center !important;
    margin-left: auto;
    margin-right: auto;
  }
  .servicios__grid, .proyectos__slider, .contacto__container {
    justify-content: center !important;
    align-items: center !important;
    text-align: center;
  }
  .contacto__info, .contacto__form {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }
  .contacto__form {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    box-sizing: border-box;
  }
}
@media (max-width: 768px) {
  .slider__images {
    height: 300px;
  }
}

/* Clase para texto oculto visualmente pero accesible para lectores de pantalla */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Animaciones de fade/slide para scroll (se activan con JS) */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s, transform 0.7s;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

.cta {
  background: linear-gradient(135deg, var(--azul-corporativo) 0%, #1669b1 100%);
  padding: 5rem 0;
  text-align: center;
  color: var(--blanco);
}
.cta__container {
  max-width: 800px;
  margin: 0 auto;
}
.cta__title {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--blanco);
}
.cta__text {
  font-size: 1.2rem;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  opacity: 0.9;
}
.btn--cta {
  background: var(--blanco);
  color: var(--azul-corporativo);
  font-size: 1.1rem;
  padding: 1em 2.5em;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.btn--cta:hover {
  background: var(--blanco);
  color: var(--azul-corporativo);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

.btn--llamanos {
  content: 'Llámanos';
  position: fixed;
  top: 36px;
  left: 36px;
  z-index: 2000;
  background: var(--azul-claro);
  color: var(--blanco);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.7em 2em;
  border-radius: 30px;
  border: none;
  box-shadow: 0 2px 8px rgba(10,76,139,0.10);
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn--llamanos:hover {
  background: var(--blanco);
  color: var(--azul-corporativo);
  box-shadow: 0 4px 16px rgba(10,76,139,0.15);
}

.btn--llamanos .llamanos-icon {
  display: none;
  vertical-align: middle;
}
.btn--llamanos .llamanos-text {
  display: inline;
}
@media (max-width: 600px) {
  .btn--llamanos .llamanos-text {
    display: none;
  }
  .btn--llamanos .llamanos-icon {
    display: inline-block !important;
  }
  .btn--llamanos {
    min-width: 44px;
    min-height: 44px;
    padding: 0.6em 0.7em;
    justify-content: center;
    align-items: center;
    display: flex;
  }
}