/* Variables de color */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #fff;
}

/* Estilos generales */
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

/* Header */
.main-header {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin: 0;
    font-size: 2.5rem;
}

/* Navegación */
.main-nav {
    background-color: var(--secondary-color);
    padding: 1rem 0;
}

.nav-list {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0 1.5rem;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 400;
    font-size: 1.1rem;
    transition: color 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.2);
}

/* Contenido principal */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.section-title {
    font-family: 'Montserrat', sans-serif;
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}

.section-text {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Tabla de cursos */
.table-container {
    overflow-x: auto;
    margin: 2rem 0;
}

.courses-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.courses-table td {
    padding: 1.5rem;
    text-align: center;
    border: 1px solid #ddd;
    transition: all 0.3s;
}

.courses-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

.courses-table tr:hover td {
    background-color: var(--light-color);
}

.course-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    transition: color 0.3s;
}

.course-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.main-course {
    font-weight: 700;
    color: var(--accent-color);
    font-size: 1.2rem;
}

/* Footer */
.main-footer {
    background-color: var(--dark-color);
    color: var(--text-light);
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

.footer-text {
    margin: 0;
}

.time-display {
    text-align: center;
    color: #666;
    font-style: italic;
    margin: 1rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-list {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-item {
        margin: 0.5rem 0;
    }
    
    .main-title {
        font-size: 2rem;
    }
}