/* =======================
   RESET Y VARIABLES MEJORADAS
======================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primario: #1c1c1c;   /* Negro profundo */
  --color-secundario: #b8a78b; /* Dorado/beige metálico */
  --color-agua: #0077be;       /* Azul para agua */
  --color-gas: #505050;        /* Gris metalizado para gas */
  --color-blanco: #ffffff;
  --color-texto: #e0e0e0;
  --color-acento: #d4c4a5;
  --max-width: 1200px;
  --border-radius: 12px;
  --transition: 0.3s ease;
  --shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

html {
  scroll-behavior: smooth;
}

/* =======================
   BODY CON FONDO INDUSTRIAL
======================= */
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1c1c1c 0%, #2a2a2a 100%);
  color: var(--color-texto);
  line-height: 1.6;
  position: relative;
}

/* Fondo sutil de tuberías */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
}

/* =======================
   HEADER MEJORADO
======================= */
header {
  background: linear-gradient(90deg, var(--color-primario) 0%, #2a2a2a 100%);
  color: var(--color-blanco);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  animation: fadeInDown 0.8s ease;
  border-bottom: 2px solid var(--color-secundario);
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 1px;
  color: var(--color-secundario);
}

.logo img {
  height: 50px;
  width: auto;
  border-radius: 6px;
  transition: transform var(--transition);
}

.logo img:hover {
  transform: rotate(-6deg) scale(1.1);
}

/* =======================
   NAVEGACIÓN MEJORADA
======================= */
nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

nav ul li a {
  font-weight: 600;
  font-size: 1rem;
  padding: 10px 16px;
  border-radius: var(--border-radius);
  transition: all var(--transition);
  color: var(--color-blanco);
  text-decoration: none;
  position: relative;
}

nav ul li a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-secundario);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

nav ul li a:hover::after {
  width: 80%;
}

nav ul li a:hover,
nav ul li a:focus {
  color: var(--color-secundario);
  transform: translateY(-3px);
  text-decoration: none;
}

/* =======================
   HERO MEJORADO CON ELEMENTOS INDUSTRIALES
======================= */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
  background: url("img/1.jpg") no-repeat center top;
  background-size: cover;
  background-position: center 10%;
  position: relative;
  overflow: hidden;
  margin: 0;

  transition: background-image 1s ease-in-out;
}

/* Elemento decorativo de tubería */
.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 150px;
  background: linear-gradient(0deg, rgba(28,28,28,1) 0%, rgba(28,28,28,0) 100%);
  z-index: 1;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.hero-content {
  max-width: 700px;
  position: relative;
  z-index: 2;
  animation: zoomIn 1.2s ease;
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 900;
  color: var(--color-secundario);
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
  position: relative;
}

/* Elemento decorativo de conexión */
.hero-content h1::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-secundario), transparent);
}

.hero-content h1 span {
  color: var(--color-blanco);
}

.hero-content p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  margin-top: 1.5rem;
  font-weight: 500;
  color: var(--color-blanco);
}

/* =======================
   BOTÓN PRINCIPAL MEJORADO
======================= */
.btn-primary {
  background: linear-gradient(135deg, var(--color-secundario), var(--color-acento));
  color: var(--color-primario);
  padding: 14px 40px;
  font-weight: 700;
  font-size: 1.1rem;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}



.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 25px rgba(184, 167, 139, 0.4);
}

/* =======================
   SECCIONES MEJORADAS
======================= */
.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin: 4rem 0 2rem;
  color: var(--color-secundario);
  font-weight: 900;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primario), var(--color-secundario), var(--color-primario));
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

/* =======================
   SERVICIOS MEJORADOS CON ELEMENTOS INDUSTRIALES
======================= */
.services {
  max-width: var(--max-width);
  margin: 0 auto 5rem auto;
  padding: 0 15px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: linear-gradient(135deg, #2a2a2a, #333);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Borde decorativo que simula tubería */
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--color-agua), var(--color-gas));
}

.service-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
}

.service-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
}

/* Overlay con icono de agua/gas */
.service-image::after {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  backdrop-filter: blur(5px);
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.service-card:hover .service-image img {
  transform: scale(1.1);
}

.service-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.service-content h3 {
  color: var(--color-secundario);
  margin-bottom: 0.8rem;
  font-weight: 800;
  font-size: 1.3rem;
  position: relative;
}

.service-content h3::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 50px;
  height: 2px;
  background: var(--color-secundario);
}

.service-content p {
  font-size: 1rem;
  color: var(--color-texto);
  line-height: 1.4;
  margin-top: 1rem;
}



/* =======================
   SECCIÓN DE VENTAJAS (NUEVA)
======================= */
.advantages-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, #222, #1a1a1a);
}

.advantages-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 15px;
}

/* Contenedor específico para las tarjetas de ventajas */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.advantage-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  padding: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  transition: transform var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
}

.advantage-icon {
  width: 60px;
  height: 60px;
  background: var(--color-secundario);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.advantage-content h3 {
  color: var(--color-secundario);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.advantage-content p {
  color: var(--color-texto);
  line-height: 1.6;
}

/* =======================
   CONTACTO MEJORADO Y PROFESIONAL
======================= */
#contacto {
  background: linear-gradient(135deg, #1a1a1a, #222);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

#contacto::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--color-agua), var(--color-calor), var(--color-gas));
}

.contact-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 15px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  transition: transform var(--transition), background var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--color-secundario);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

/* Iconos específicos para cada contacto */
.contact-item:nth-child(1) .contact-icon {
  background: var(--color-agua);
}
.contact-item:nth-child(2) .contact-icon {
  background: var(--color-gas);
}
.contact-item:nth-child(3) .contact-icon {
  background: var(--color-calor);
}
.contact-item:nth-child(4) .contact-icon {
  background: var(--color-secundario);
}

.contact-text h3 {
  color: var(--color-secundario);
  margin-bottom: 0.3rem;
  font-size: 1.1rem;
}

.contact-text p {
  color: var(--color-texto);
  font-size: 1rem;
}

/* Estilos para redes sociales */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: all var(--transition);
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.social-icon {
  font-size: 1.2rem;
}

.social-text {
  font-size: 0.9rem;
  color: var(--color-texto);
}

.social-link.facebook:hover .social-icon {
  color: #1877f2;
}

.social-link.instagram:hover .social-icon {
  color: #e4405f;
}

/* Estilos para el formulario de contacto */
.contact-form-container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-form {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-form h3 {
  color: var(--color-secundario);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.contact-form p {
  color: var(--color-texto);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.btn-whatsapp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
}

.btn-icon {
  font-size: 1.2rem;
}

.btn-text {
  font-size: 1rem;
}

/* Responsive para la sección de contacto */
@media (max-width: 768px) {
  .contact-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .contact-item {
    padding: 1rem;
  }
  
  .contact-form {
    padding: 1.5rem;
  }
  
  .social-links {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* =======================
   FOOTER MEJORADO
======================= */
footer {
  background: var(--color-primario);
  color: var(--color-secundario);
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  border-top: 2px solid var(--color-secundario);
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  pointer-events: none;
}

/* =======================
   RESPONSIVE MEJORADO
======================= */
@media (max-width: 768px) {
  .hero {
    height: auto;
    padding: 100px 15px 80px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-content h1 {
    font-size: 1.8rem;
    line-height: 1.3;
    word-break: break-word;
  }

  .hero-content p {
    font-size: 1rem;
    line-height: 1.5;
    padding: 0 10px; 
  }

  .process-steps::before {
    display: none;
  }

  .process-step {
    margin-bottom: 2rem;
  }
}

/* =======================
   MENÚ INFERIOR (Mobile)
======================= */
.bottom-nav {
  display: none; /* oculto en escritorio */
}

.bottom-nav ul {
  display: flex;
  list-style: none;
  justify-content: space-around;
  align-items: center;
  margin: 0;
  padding: 0;
  width: 100%;
}

@media (max-width: 768px) {
  .bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 65px;
    background: linear-gradient(135deg, var(--color-primario), #1b1b1b);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    border-top-left-radius: 14px;
    border-top-right-radius: 14px;
    padding: 0 10px;
    transition: padding-bottom 0.3s ease; /* suave */
  }

  body {
    transition: padding-bottom 0.3s ease;
  }

  .bottom-nav ul li a {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-secundario);
    text-decoration: none;
    padding: 6px 10px;
    border-radius: 10px;
    transition: all 0.3s ease;
  }

  .bottom-nav ul li a span {
    font-size: 0.7rem;
    margin-top: 2px;
  }

  /* Hover */
  .bottom-nav ul li a:hover,
  .bottom-nav ul li a:focus {
    background-color: var(--color-secundario);
    color: var(--color-primario);
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
  }

  /* Activo */
  .bottom-nav ul li a.active {
    background-color: var(--color-secundario);
    color: var(--color-primario);
    box-shadow: inset 0 0 6px rgba(0,0,0,0.5);
  }

  /* Deja espacio para el menú inferior */
  body {
    padding-bottom: 70px;
  }
}

/* =======================
   RESPONSIVE HEADER
======================= */
@media (max-width: 768px) {
  /* Centrar header en responsive */
  .header-container {
    justify-content: center;
    text-align: center;
    padding: 0 10px;
  }

  .logo {
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-size: 1.2rem;
    text-align: center;
  }

  .logo img {
    height: 40px; /* más compacto en móviles */
  }

  /* Ocultar menú superior */
  .top-nav {
    display: none;
  }

  /* Ajuste extra para que no quede espacio raro */
  header {
    height: auto;
    padding: 5px 0;
  }
}

/* =======================
   AJUSTES PARA LOGIN
======================= */
.login-btn {
  background: var(--color-agua) !important;
  padding: 8px 16px;
  border-radius: 8px;
  color: #fff !important;
  font-weight: 600;
}

.login-btn:hover {
  background: #01407f !important;
}

/* =======================
   ANIMACIONES ADICIONALES
======================= */
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(184, 167, 139, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(184, 167, 139, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(184, 167, 139, 0);
  }
}

.pulse {
  animation: pulse 2s infinite;
}
/* =======================
   ESTILOS PARA EL HEADER DEL FORMULARIO
======================= */
.form-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-logo {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.form-logo:hover {
    transform: scale(1.1);
}

.contact-form h3 {
    color: var(--color-secundario);
    font-size: 1.5rem;
    margin: 0;
}
/*=========================
      MODAL GALERÍA PRO
==========================*/

.modal-galeria{
    position:fixed;
    inset:0;
    background:rgba(8,10,15,.95);
    backdrop-filter:blur(10px);
    display:none;
    justify-content:center;
    align-items:center;
    flex-direction:column;
    z-index:99999;
    animation:fadeGaleria .35s ease;
}

.modal-galeria.active{
    display:flex;
}

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

.modal-contenido{

    position:relative;
    width:90%;
    max-width:1100px;
    display:flex;
    justify-content:center;
    align-items:center;
}

.modal-contenido img{

    width:100%;
    max-height:82vh;
    object-fit:contain;

    border-radius:18px;

    background:#111;

    box-shadow:
    0 20px 70px rgba(0,0,0,.6),
    0 0 0 1px rgba(255,255,255,.05);

    animation:zoomFoto .25s ease;
}

@keyframes zoomFoto{

from{

transform:scale(.95);
opacity:0;

}

to{

transform:scale(1);
opacity:1;

}

}

/*=========================
        BOTÓN CERRAR
==========================*/

.cerrar-modal{

    position:absolute;
    top:25px;
    right:35px;

    width:48px;
    height:48px;

    border-radius:50%;

    display:flex;
    justify-content:center;
    align-items:center;

    background:rgba(255,255,255,.08);

    color:#fff;

    font-size:30px;

    cursor:pointer;

    transition:.3s;
}

.cerrar-modal:hover{

    background:#fff;
    color:#111;
    transform:rotate(90deg);

}

/*=========================
        FLECHAS
==========================*/

.flecha{

    position:absolute;

    width:60px;
    height:60px;

    border:none;

    border-radius:50%;

    background:rgba(255,255,255,.10);

    color:white;

    font-size:34px;

    cursor:pointer;

    transition:.3s;

    backdrop-filter:blur(10px);
}

.flecha:hover{

    background:var(--color-secundario);
    color:#111;

    transform:scale(1.08);
}

#anterior{

left:-90px;

}

#siguiente{

right:-90px;

}

/*=========================
        MINIATURAS
==========================*/

.miniaturas{

    margin-top:28px;

    display:flex;

    gap:12px;

    justify-content:center;

    flex-wrap:wrap;

    max-width:1000px;

    padding:0 20px;
}

.miniaturas img{

    width:90px;
    height:65px;

    object-fit:cover;

    border-radius:10px;

    cursor:pointer;

    opacity:.45;

    transition:.25s;

    border:2px solid transparent;

    box-shadow:0 5px 15px rgba(0,0,0,.35);
}

.miniaturas img:hover{

    opacity:1;

    transform:translateY(-4px) scale(1.05);

}

.miniaturas img.activa{

    opacity:1;

    border-color:var(--color-secundario);

    transform:scale(1.08);

    box-shadow:
    0 0 0 2px rgba(255,255,255,.08),
    0 0 18px rgba(255,170,0,.55);

}

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

@media(max-width:900px){

#anterior{

left:15px;

}

#siguiente{

right:15px;

}

.flecha{

width:50px;
height:50px;
font-size:28px;

}

.modal-contenido{

width:95%;

}

}

@media(max-width:600px){

.modal-contenido img{

max-height:68vh;

}

.cerrar-modal{

top:15px;
right:15px;

width:42px;
height:42px;

font-size:24px;

}

.miniaturas{

gap:8px;

padding:0 10px;

}

.miniaturas img{

width:65px;
height:50px;

}

}
/* =======================
   AJUSTES RESPONSIVOS PARA EL FORMULARIO
======================= */
@media (max-width: 768px) {
    .form-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .form-logo {
        width: 40px;
        height: 40px;
    }
    
    .contact-form h3 {
        font-size: 1.3rem;
    }
}