* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    line-height: 1.5;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: #0a2b3e;
    color: white;
    flex-wrap: wrap;
}
nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}
nav a {
    color: white;
    text-decoration: none;
}
.btn-cotizar, .btn-cta {
    background: #f39c12;
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    font-weight: bold;
}
.banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 3rem;
    background: #f4f6f9;
}
.grid-productos, .grid-categorias {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem;
}
.producto-card {
    border: 1px solid #ddd;
    padding: 1rem;
    border-radius: 12px;
}
/* Móviles */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    nav ul {
        flex-direction: column;
        padding: 1rem 0;
    }
    .banner {
        flex-direction: column;
        text-align: center;
    }
}