/* Reset y Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ffcc00; /* color de la marca */
    --secondary-color: #1a1a2e;
    --accent-color: #0f3460;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header y Navegación */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    width: 45%;
}

.logo-footer img {
    width: 100%;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    height: 70vh;
    min-height: 500px;
    background-image: url('images/construcciones-BF-mantenciones-profesionales.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    margin-top: 70px;
    -webkit-background-size: cover;
    -webkit-background-attachment: fixed;
    -moz-background-size: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 46, 0.8);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s backwards;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.btn-primary:hover {
    background: #ff8533;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Secciones */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}
/* Acento visual en títulos */
.section-title::after {
    content: "";
    display: block;
    width: 64px;
    height: 4px;
    margin: 10px auto 0;
    background: linear-gradient(90deg, var(--primary-color), #ff8533);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* Servicios */
.servicios {
    background: var(--light-bg);
}

.servicios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.servicio-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
    box-shadow: var(--shadow);
}

.servicio-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.servicio-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #ff8533);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.servicio-icon i {
    font-size: 2rem;
    color: var(--white);
}

.servicio-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-size: 1.4rem;
}

.servicio-card p {
    color: #666;
    line-height: 1.8;
}

/* Nosotros */
.nosotros {
    position: relative;
    background-color: #ffffff;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(15, 52, 96, 0.07) 1px, transparent 1px),
        radial-gradient(circle at 3px 3px, rgba(255, 107, 0, 0.05) 1px, transparent 1px);
    background-size: 24px 24px;
}
.nosotros-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.nosotros-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.nosotros-text > p {
    margin-bottom: 2rem;
    color: #666;
    font-size: 1.1rem;
    line-height: 1.8;
}

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

.caracteristica {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.caracteristica i {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-top: 0.3rem;
}

.caracteristica h4 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.caracteristica p {
    color: #666;
}

.nosotros-image img {
    width: 100%;
    height: 650px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

/* Galería de Trabajos */
.galeria {
    padding: 5rem 0;
    background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
}

.galeria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.galeria-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.3s;
}

.galeria-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.galeria-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s;
    display: block;
}

.galeria-item:hover img {
    transform: scale(1.1);
}

.galeria-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(26, 26, 46, 0.95), transparent);
    color: var(--white);
    padding: 2rem 1.5rem 1.5rem;
    transform: translateY(100%);
    transition: transform 0.3s;
}

.galeria-item:hover .galeria-overlay {
    transform: translateY(0);
}

.galeria-overlay h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.galeria-overlay p {
    color: #ccc;
    font-size: 0.95rem;
}

/* Galería Slider */
   


/* Contacto */
.contacto {
    background: var(--light-bg);
}

.contacto-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
}

.contacto-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.info-item i {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-top: 0.3rem;
}

.info-item h4 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.info-item p {
    color: #666;
}

/* Formulario */
.contacto-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
    font-family: inherit;
}

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

.form-group textarea {
    resize: vertical;
}

.contacto-form .btn {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section h3 span {
    color: var(--primary-color);
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-section p {
    color: #ccc;
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #ccc;
}

/* Botón WhatsApp */
.whatsapp-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: all 0.3s;
    animation: pulse 2s infinite;
    text-decoration: none;
    line-height: 1;
}

.whatsapp-button:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 35px rgba(37, 211, 102, 0.4);
    text-decoration: none;
}

.whatsapp-button i {
    font-size: 2rem;
    color: var(--white);
    display: block;
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Slider de Proyectos */
.slider-section {
    padding: 4rem 0;
    background: var(--light-bg);
}

.slider-container {
    position: relative;
    overflow: hidden;
    margin: 0 auto;
    max-width: 100%;
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
    will-change: transform;
}

.slide {
    min-width: calc(100% / 3);
    padding: 0 10px;
    box-sizing: border-box;
    flex-shrink: 0;
}

.slide img {
    width: 360px;
    height: 450px;
    object-fit: cover;
    border-radius: 10px;
    cursor: zoom-in;
    transition: transform 0.3s ease;
    display: block;
}

.slide img:hover {
    transform: scale(1.05);
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    font-size: 2rem;
    padding: 1rem 1.2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    border-radius: 5px;
    line-height: 1;
}

.slider-btn:hover {
    background: rgba(0, 0, 0, 0.8);
}

.slider-btn.prev {
    left: 10px;
}

.slider-btn.next {
    right: 10px;
}

.slider-dots {
    display: none;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    cursor: zoom-out;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 3rem;
    color: white;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 10001;
    transition: transform 0.3s ease;
    line-height: 1;
}

.lightbox-close:hover {
    transform: scale(1.2);
}

.lightbox img {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    z-index: 10000;
    border-radius: 10px;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    color: var(--secondary-color);
    border: none;
    font-size: 2.5rem;
    padding: 1rem 1.5rem;
    cursor: pointer;
    z-index: 10001;
    transition: all 0.3s ease;
    border-radius: 5px;
    line-height: 1;
    font-weight: bold;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

@media (max-width: 768px) {
    .lightbox-prev,
    .lightbox-next {
        font-size: 2rem;
        padding: 0.8rem 1.2rem;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero {
        margin-top: 70px;
        background-attachment: scroll;
        -webkit-background-attachment: scroll;
        height: 60vh;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

    .nosotros-content {
        grid-template-columns: 1fr;
    }

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

    .slide {
        min-width: 100%;
        max-width: 100%;
        padding: 0;
        flex: 0 0 100%;
    }

    .slide img {
        width: 100% !important;
        max-width: 100%;
        height: 260px;
    }

    .slider-btn {
        padding: 0.8rem 1rem;
        font-size: 1.5rem;
    }

    .contacto-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

    .whatsapp-button {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }

    .whatsapp-button i {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contacto-form {
        padding: 1.5rem;
    }
}