.portfolio-section {
    padding: 100px 15%;
    background-color: var(--color-light);
    width: 100%;
}

.portfolio-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-dark);
    text-align: center;
    margin-bottom: 2rem;
}


.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    padding: 0.5rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.portfolio-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden; 
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    background-color: var(--color-light);
    display: block;
    text-decoration: none; 
}

.portfolio-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-fast);
}


.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(30, 41, 59, 0.95) 0%, rgba(30, 41, 59, 0.6) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.portfolio-overlay h3 {
    color: var(--color-light);
    font-size: 1.25rem;
    margin-bottom: 0.2rem;
    transform: translateY(15px);
    transition: transform var(--transition-fast);
}

.portfolio-overlay p {
    color: var(--color-light);
    font-size: 0.9rem;
    transform: translateY(15px);
    transition: transform var(--transition-fast);
}

.portfolio-item:hover img {
    transform: scale(1.08); 
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover .portfolio-overlay h3,
.portfolio-item:hover .portfolio-overlay p {
    transform: translateY(0);
}

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    z-index: 2000;
    transition: all 0.3s ease;
}

.lightbox:target {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 80%;
    max-height: 80%;
}

.lightbox-content img {
    width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);

}

.lightbox-close {
    position: absolute;
    top: -45px;
    right: 0;
    font-size: 2.5rem;
    color: #ffffff;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--color-primary);
}

@media (max-width: 1023px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    .portfolio-filters {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .filter-btn {
        padding: 0.4rem 1.2rem;
        font-size: 0.85rem;
    }
}