.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    background: var(--bg-color-accent-medium);
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: none;
    transform: translateY(0);
    color: var(--text-color-dark);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary-gradient-90);
    color: var(--text-color-white);
    box-shadow: 0 4px 15px var(--shadow-color-dark);
    transform: translateY(-2px);
}

.portfolio-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
}

.portfolio-item {
    flex: 1 1 300px;
    max-width: 400px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow-color-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color-medium);
}

.portfolio-img {
    height: 200px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color-white);
    font-size: 3rem;
}

.portfolio-info {
    padding: 1.5rem;
    background: var(--bg-color-light);
}

.portfolio-info h3 {
    color: var(--primary-color-start);
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--bg-color-accent-medium);
    color: var(--primary-color-start);
    padding: 0.2rem 0.8rem;
    border-radius: 30px;
    font-size: 0.8rem;
}