:root {
    --primary: #f59e0b; /* Amarillo Solar */
    --secondary: #1e293b; /* Azul Oscuro Panel */
    --text: #334155;
    --light: #f8fafc;
    --white: #ffffff;
}
body { 
    font-family: 'Segoe UI', system-ui, sans-serif; 
    line-height: 1.6; 
    color: var(--text); 
    margin: 0; 
    background: var(--light); 
}
header { 
    background: var(--secondary); 
    color: var(--white); 
    padding: 1rem 0; 
}
nav { 
    max-width: 1200px; 
    margin: 0 auto; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 0 20px; 
}
nav a { 
    color: var(--white); 
    text-decoration: none; 
    margin-left: 20px; 
    font-weight: 600; 
}
.hero { 
    background: linear-gradient(to right, var(--secondary), #334155); 
    color: white; 
    padding: 4rem 20px; 
    text-align: center; 
}
.btn { 
    background: var(--primary); 
    color: var(--secondary); 
    padding: 10px 25px; 
    text-decoration: none; 
    font-weight: bold; 
    border-radius: 5px; 
    display: inline-block; 
    margin-top: 10px; 
}
.container { 
    max-width: 1200px; 
    margin: 2rem auto; 
    padding: 0 20px; 
}
.grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 2rem; 
}
.card { 
    background: white; 
    padding: 20px; 
    border-radius: 8px; 
    box-shadow: 0 2px 5px rgba(0,0,0,0.1); 
    transition: transform 0.2s; 
}
.card:hover { 
    transform: translateY(-5px); 
}
.card h3 { 
    color: var(--secondary); 
    margin-top: 0; 
}
.sidebar-layout { 
    display: grid; 
    grid-template-columns: 1fr 300px; 
    gap: 2rem; 
}
/* Estilo para que las imágenes sean responsivas y se centren */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto; /* Centrar y añadir margen vertical */
    border-radius: 6px;
}

@media (max-width: 768px) { 
    .sidebar-layout { 
        grid-template-columns: 1fr; 
    } 
}
article h1 { 
    color: var(--secondary); 
    font-size: 2.5rem; 
}
article h2 { 
    color: var(--secondary); 
    border-bottom: 2px solid var(--primary); 
    padding-bottom: 10px; 
    margin-top: 2rem; 
}
.amazon-box { 
    border: 2px solid #f59e0b; 
    background: #fffbeb; 
    padding: 20px; 
    margin: 20px 0; 
    border-radius: 8px; 
    text-align: center; 
}
footer { 
    background: var(--secondary); 
    color: white; 
    text-align: center; 
    padding: 2rem 0; 
    margin-top: 3rem; 
}