body {
    color: #111111;
    background-color: #ffffff;
    touch-action: manipulation;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, 
                 "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

.libros-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 280px));
    gap: 30px;
    padding: 40px 20px;
    justify-content: start;
}

.card {
    box-sizing: border-box;
    width: 280px;
    height: auto;
    background: rgba(217, 217, 217, 0.58);
    border: 1px solid white;
    box-shadow: 12px 17px 30px rgba(0, 0, 0, 0.18);
    backdrop-filter: blur(6px);
    border-radius: 17px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s;
    display: flex;
    flex-direction: column;
    align-items: center;
    user-select: none;
    font-weight: bolder;
    color: black;
}

.card:hover {
    border: 1px solid black;
    transform: scale(1.05);
}

.card:active {
    transform: scale(0.95) rotateZ(1.7deg);
}

/* IMAGEN */
.portada-img {
    width: 160px;
    margin: 20px 0;
}

/* INFO */
.info-bibliografica {
  max-width: 240px;
  line-height: 1.6;
  text-align: left;
  font-size: 0.85rem;
  padding: 10px;
}

.titulo {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 24px;
}

.titulo::after {
  content: "";
  display: block;
  height: 2px;
  width: 120px;
  background: linear-gradient(90deg, #901f2c, #C79A42);
  margin-top: 8px;
  border-radius: 2px;
}

.autores {
  font-size: 0.9rem;
  margin-bottom: 10px;
  line-height: 20px;
}

.editorial,
.institucion,
.isbn {
  font-size: 0.8rem;
  color: #5d5d5d;
  margin: 4px 0;
}

.isbn {
  letter-spacing: 0.5px;
}

/* RESPONSIVO */
@media (max-width: 768px) {

    .libros-container {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px 10px;
    }

    .card {
        width: 100%;
    }

    .portada-img {
        width: 140px;
    }

    .info-bibliografica {
        text-align: center;
        max-width: 100%;
    }
}