.portfolio-hero {
    margin-top: 80px;
    padding: 80px 0;
    background: var(--color-gradient-2);
    color: var(--color-white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.portfolio-hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.portfolio-hero-title {
    color: var(--color-white);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.portfolio-hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

.portfolio-filter-section {
    padding: 100px 0;
    background-color: var(--color-white);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 60px;
}

.filter-btn {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    background-color: var(--color-white);
    color: var(--color-gray-medium);
    border: 2px solid var(--color-gray-border);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.portfolio-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.portfolio-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 1;
    cursor: pointer;
    transition: var(--transition);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    color: var(--color-white);
    transform: translateY(100%);
    transition: var(--transition);
}

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

.portfolio-item:hover img {
    transform: scale(1.05);
}

.portfolio-overlay h3 {
    font-size: 18px;
    margin-bottom: 4px;
    color: var(--color-white);
}

.portfolio-overlay p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.before-after {
    padding: 100px 0;
    background-color: var(--color-gray-light);
}

.before-after-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 60px;
    margin-top: 60px;
}

.before-after-item {
    text-align: center;
}

.before-after-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.before-image,
.after-image {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.before-image img,
.after-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.label {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 700;
    background-color: var(--color-black);
    color: var(--color-white);
    border-radius: 4px;
    letter-spacing: 1px;
}

.before-after-description {
    font-size: 16px;
    color: var(--color-gray-medium);
}

@media (max-width: 968px) {
    .portfolio-gallery {
        grid-template-columns: repeat(3, 1fr);
    }

    .before-after-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .portfolio-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .portfolio-hero {
        padding: 60px 0;
    }

    .portfolio-filter-section,
    .before-after {
        padding: 60px 0;
    }

    .filter-buttons {
        gap: 12px;
    }

    .filter-btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .portfolio-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .before-after-grid {
        grid-template-columns: 1fr;
    }

    .before-after-images {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}