.erians-libro-box {
    background: linear-gradient(135deg, #111, #1a1a1a);
    border-radius: 20px;
    padding: 30px;
    margin: 40px 0;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

.erians-libro-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 30px;
    align-items: center;
}

.erians-libro-cover img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.erians-libro-content h3 {
    font-size: 28px;
    margin: 0 0 6px 0;
    color: #fff;
}

.erians-libro-autor {
    color: #aaa;
    margin-bottom: 16px;
}

.erians-libro-desc {
    color: #ddd;
    line-height: 1.6;
    margin-bottom: 20px;
}

.erians-libro-lista {
    margin: 0 0 25px 0;
    padding: 0;
    list-style: none;
}

.erians-libro-lista li {
    color: #ddd;
    margin-bottom: 8px;
    position: relative;
    padding-left: 24px;
}

.erians-libro-lista li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #3fd0c9;
    font-weight: bold;
}

.erians-libro-boton {
    display: inline-block;
    padding: 14px 26px;
    border-radius: 12px;
    background: linear-gradient(135deg, #ff4d8d, #3fd0c9);
    color: #000;
    font-weight: bold;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.erians-libro-boton:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

@media (max-width: 768px) {
    .erians-libro-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}
.erians-libro-botones {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.erians-libro-boton-secundario {
    background: linear-gradient(135deg, #222, #333);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.15);
}

.erians-libro-boton-secundario:hover {
    box-shadow: 0 0 0 2px rgba(255,255,255,0.1);
}