body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5; 
    color: #333; 
    margin: 0;
    padding: 40px 20px;
}


header {
    text-align: center;
    margin-bottom: 50px;
}

header h1 {
    color: #1a365d; 
    margin-bottom: 5px;
}

header h2 {
    color: #2b6cb0;
    font-weight: 300;
    margin-top: 0;
}


.contenedor {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin: 0 auto;
}

.caja {
    background-color: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.caja h3 {
    color: #2d3748;
    border-bottom: 2px solid #e2e8f0; 
    padding-bottom: 10px;
    margin-top: 0;
}

ol {
    padding-left: 20px;
}

li {
    margin-bottom: 8px; 
}

p {
    margin: 0;
}

a {
    text-decoration: none;
    color: #4a5568;
}

a:hover {
    color: #3182ce; 
}