.book-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    width: 100%;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    position: relative;
    transition: transform 0.25s ease, box-shadow 0.25s ease,
        background-color 0.2s ease;
}

.book-card:hover {
    background-color: #f9fefe;
    transform: translateY(-6px);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.18);
}

/* Premium Badge */
.book-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 8px;
    position: absolute;
    top: 0;
    left: 50%;
    letter-spacing: 0.5px;
    transform: translate(-50%, -50%);
}

/* Cover */
.book-cover {
    width: 150px;
    height: 210px;
    border-radius: 12px;
    object-fit: cover;
    margin: 12px 0;
}

/* Title */
.book-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--primary);
}



/* Price */
.book-price {
    font-size: 1.35em;
    font-weight: 700;
    margin: 8px 0 12px;
    color: var(--primary);
}

/* Buttons */
.book-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.book-btn {
    font-size: 13px;
    font-weight: 500;
    padding: 9px 12px;
    border-radius: 4px;
    min-width: 105px;
    white-space: nowrap;
}

.book-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}