.portfolio-card {
    background: #fff;
    border: 1px solid #eaeaea;
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.3s ease;
    margin-bottom: 20px;
}
.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
.portfolio-card .img-container {
    position: relative;
    width: 100%;
    padding-top: 133%; /* 3:4 aspect ratio approx */
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 15px;
    background: #f8f8f8;
}
.portfolio-card .img-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.portfolio-card .category-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: #ff9800; /* Orange color from screenshot */
    color: #fff;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 20px;
    text-transform: uppercase;
    z-index: 2;
}
.portfolio-card .rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 12px;
}
.portfolio-card .stars {
    color: #ffc107; /* Gold stars */
    letter-spacing: 2px;
}
.portfolio-card .rating-number {
    color: #666;
    font-weight: 600;
}
.portfolio-card .book-title {
    font-size: 16px;
    font-weight: 700;
    color: #111;
    margin-bottom: 8px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}
.portfolio-card .book-author {
    font-size: 13px;
    color: #666;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-style: italic;
}
.portfolio-card .book-author i {
    font-size: 12px;
}
.portfolio-card .tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}
.portfolio-card .tag {
    background: #f5f5f5;
    color: #555;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    letter-spacing: 0.5px;
}
.portfolio-card .amazon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    background: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 6px;
    color: #111;
    font-weight: 700;
    font-size: 12px;
    text-decoration: none;
    transition: all 0.2s;
    text-transform: uppercase;
}
.portfolio-card .amazon-btn:hover {
    background: #e9ecef;
    color: #000;
}

/* Make grid columns 5 per row for desktop if possible, or use standard flex */
.portfolio-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.portfolio-grid-item {
    flex: 0 0 calc(20% - 16px);
    max-width: calc(20% - 16px);
}
@media (max-width: 1200px) {
    .portfolio-grid-item {
        flex: 0 0 calc(25% - 15px);
        max-width: calc(25% - 15px);
    }
}
@media (max-width: 991px) {
    .portfolio-grid-item {
        flex: 0 0 calc(33.333% - 14px);
        max-width: calc(33.333% - 14px);
    }
}
@media (max-width: 767px) {
    .portfolio-grid-item {
        flex: 0 0 calc(50% - 10px);
        max-width: calc(50% - 10px);
    }
}
@media (max-width: 480px) {
    .portfolio-grid-item {
        flex: 0 0 100%;
        max-width: 100%;
    }
}