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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Navegación */
.navbar {
    background-color: #1a1a2e;
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: #00adb5;
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: #eee;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-link:hover {
    background-color: #00adb5;
    color: white;
}

.nav-link.active {
    background-color: #00adb5;
    color: white;
}

.login-btn {
    background-color: #00adb5;
    color: white;
    padding: 0.5rem 1.5rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 2px;
}

/* Header principal */
.main-header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #00adb5;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.header-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Botones */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #00adb5;
    color: white;
}

.btn-primary:hover {
    background-color: #0097a7;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,173,181,0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #00adb5;
    border: 2px solid #00adb5;
}

.btn-secondary:hover {
    background-color: #00adb5;
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: #00adb5;
    border: 2px solid #00adb5;
}

.btn-outline:hover {
    background-color: #00adb5;
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

/* Secciones */
section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a1a2e;
}

/* Tarjetas */
.features-grid, .articles-grid, .courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card, .article-card, .course-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover, .article-card:hover, .course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.article-date {
    color: #666;
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

.read-more {
    color: #00adb5;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    margin-top: 1rem;
}

.read-more:hover {
    text-decoration: underline;
}

/* Footer */
.main-footer {
    background-color: #1a1a2e;
    color: white;
    padding: 3rem 2rem 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #ddd;
    text-decoration: none;
}

.footer-links a:hover {
    color: #00adb5;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #2d3047;
    color: #aaa;
    font-size: 0.9rem;
}

.footer-note {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #1a1a2e;
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .header-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    section {
        padding: 2rem 1rem;
    }
}

.text-center {
    text-align: center;
}