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

:root {
    --primary-blue: #3b82f6;
    --secondary-blue: #60a5fa;
    --light-blue: #dbeafe;
    --dark-gray: #1e293b;
    --medium-gray: #64748b;
    --light-gray: #94a3b8;
    --bg-gray: #f1f5f9;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--dark-gray);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Barra de navegación */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #e2e8f0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-gray);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    color: var(--primary-blue);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
    align-items: center;
}

.nav-links a {
    color: var(--dark-gray);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
    padding: 8px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-blue);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 10px 0;
    min-width: 200px;
    margin-top: 10px;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--dark-gray);
    transition: background-color 0.3s;
}

.dropdown-menu a:hover {
    background-color: var(--bg-gray);
    color: var(--primary-blue);
}

/* Submenú de segundo nivel */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu-content {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 10px 0;
    min-width: 220px;
    list-style: none;
}

.dropdown-submenu:hover .dropdown-submenu-content {
    display: block;
}

.dropdown-submenu > a::after {
    content: '›';
    float: right;
    margin-left: 10px;
}

.dropdown-submenu-content li {
    padding: 0;
}

.dropdown-submenu-content a {
    display: block;
    padding: 12px 20px;
    color: var(--dark-gray);
    transition: background-color 0.3s;
}

.dropdown-submenu-content a:hover {
    background-color: var(--bg-gray);
    color: var(--primary-blue);
}


/* Buscador */
.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-gray);
    border-radius: 25px;
    padding: 8px 15px;
    gap: 10px;
}

.search-input {
    border: none;
    background: transparent;
    outline: none;
    width: 200px;
    font-size: 14px;
    color: var(--dark-gray);
}

.search-input::placeholder {
    color: var(--medium-gray);
}

.search-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Hero Section */
.hero {
    padding-top: 70px;
    background: linear-gradient(135deg, var(--bg-gray) 0%, var(--white) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 30px;
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 40px;
    align-items: center;
    width: 100%;
}

.hero-text {
    z-index: 10;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    color: var(--dark-gray);
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.hero-text h2 {
    font-size: 28px;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 17px;
    color: var(--medium-gray);
    line-height: 1.8;
    margin-bottom: 35px;
    max-width: 450px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
}

.cta-button {
    padding: 14px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
}

.cta-button.primary {
    background-color: var(--primary-blue);
    color: var(--white);
    border: 2px solid var(--primary-blue);
}

.cta-button.primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.cta-button.secondary {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.cta-button.secondary:hover {
    background-color: var(--light-blue);
    transform: translateY(-2px);
}

.cta-button.large {
    padding: 18px 40px;
    font-size: 18px;
}

/* Hero Image Slider Grande */
.hero-image-large {
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    width: 100%;
    height: 70vh;
    min-height: 500px;
}

.photo-slider-large {
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2);
}

.slider-track {
    display: flex;
    height: 100%;
    animation: slidePhotos 25s linear infinite;
}

.slide {
    min-width: 800px;
    height: 100%;
    flex-shrink: 0;
}

.slider-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@keyframes slidePhotos {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-2400px); /* 3 fotos × 800px */
    }
}

/* Features Section */
.features {
    padding: 100px 30px;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: 60px;
}

.feature-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 15px;
    color: var(--medium-gray);
    line-height: 1.7;
}

/* Stats Section */
.stats {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: 80px 30px;
    color: var(--white);
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 50px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 18px;
    opacity: 0.95;
}

/* CTA Section */
.cta-section {
    padding: 100px 30px;
    background-color: var(--bg-gray);
    text-align: center;
}

.cta-section h2 {
    font-size: 38px;
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 18px;
    color: var(--medium-gray);
    margin-bottom: 40px;
}

/* About Section */
.about-section {
    padding: 100px 30px;
    background-color: var(--white);
}

.about-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 17px;
    color: var(--medium-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Videos Section */
.videos-section {
    padding: 100px 30px;
    background-color: var(--bg-gray);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--medium-gray);
    margin-bottom: 50px;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.video-card {
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* Relación 16:9 */
    height: 0;
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 10px;
}

.video-info p {
    font-size: 14px;
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Footer */
footer {
    background-color: var(--dark-gray);
    color: var(--light-gray);
    padding: 60px 30px 30px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-description {
    font-size: 14px;
    line-height: 1.7;
    max-width: 300px;
}

.footer-column h3 {
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--light-gray);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: var(--secondary-blue);
}

.footer-bottom {
    border-top: 1px solid var(--medium-gray);
    padding-top: 30px;
    text-align: center;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-image-large {
        height: 50vh;
        min-height: 400px;
    }
    
    .slide {
        min-width: 600px;
    }
    
    @keyframes slidePhotos {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(-1800px); /* 3 fotos × 600px */
        }
    }
    
    .videos-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding: 15px 20px;
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        margin-top: 15px;
        flex-direction: column;
        gap: 0;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 10px 0;
    }
    
    .search-box {
        order: 2;
    }
    
    .hero-text h1 {
        font-size: 38px;
    }
    
    .hero-text h2 {
        font-size: 22px;
    }
    
    .hero-image-large {
        height: 40vh;
        min-height: 300px;
    }
    
    .slide {
        min-width: 400px;
    }
    
    @keyframes slidePhotos {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(-1200px); /* 3 fotos × 400px */
        }
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}

/* Sección de Colaboración Institucional */
.colaboracion-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
}

.colaboracion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.colaboracion-card {
    background: var(--white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 3px solid var(--primary-blue);
}

.colaboracion-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.colaboracion-icon {
    width: 70px;
    height: 70px;
    background: var(--light-blue);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.colaboracion-card h3 {
    font-size: 20px;
    color: var(--dark-gray);
    margin-bottom: 15px;
    font-weight: 600;
}

.colaboracion-card p {
    color: var(--medium-gray);
    line-height: 1.7;
    font-size: 15px;
}

.colaboracion-cta {
    background: var(--white);
    padding: 50px;
    border-radius: 16px;
    text-align: center;
    margin-top: 50px;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--light-blue);
}

.colaboracion-cta h3 {
    font-size: 28px;
    color: var(--dark-gray);
    margin-bottom: 20px;
    font-weight: 600;
}

.colaboracion-cta p {
    color: var(--medium-gray);
    font-size: 16px;
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto 30px;
}