/* Reset y variables globales */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e67e22;
    --light-bg: #f8f9fa;
    --dark-text: #2c3e50;
    --light-text: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--light-bg);
}

/* Hero Section */
.hero {
    height: 60vh;
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1501954591486-4c099b7e1a88?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--light-text);
}

.hero-overlay {
    max-width: 800px;
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* Navbar Mejorado */
.navbar {
    background-color: var(--primary-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

.navbar a {
    color: var(--light-text);
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    display: inline-block;
    transition: var(--transition);
    font-weight: 500;
}

.navbar a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Secciones generales */
.section-card, .section-grid, .section-facts {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 1rem;
}

/* Tarjetas de sección */
.card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

@media (min-width: 768px) {
    .card-content {
        flex-direction: row;
        align-items: stretch;
    }
    
    .card-content img {
        max-width: 50%;
        object-fit: cover;
    }
    
    .card-content > div {
        padding: 2rem;
        flex: 1;
    }
}

.card-content img {
    width: 100%;
    height: auto;
    display: block;
}

.card-content h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* Grid de especies */
.species-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.species-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.species-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.species-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.species-card h3 {
    padding: 1.5rem;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.species-card p {
    padding: 0 1.5rem 1.5rem;
    color: #555;
}

/* Contenedor de hechos */
.facts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.fact-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.fact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.fact-item i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.fact-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* Footer Mejorado */
footer {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--light-text);
    font-size: 1.5rem;
    transition: var(--transition);
}

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