.btn-black {
    background: var(--primary-black) !important;
    color: white !important;
    padding: 12px 30px;
    border-radius: 0;
    font-weight: 600;
    transition: 0.3s;
    border: none;
}

.btn-black:hover {
    background: #333 !important;
}

.page-header {
    padding: 100px 0 60px 0;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1;
    margin-bottom: 20px;
}


.filter-menu {
    margin-bottom: 50px;
}

.filter-btn {
    background: transparent;
    border: 1px solid transparent;
    color: #888;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 1px;
    padding: 8px 20px;
    margin: 0 5px;
    transition: 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--primary-black);
    border-bottom: 1px solid var(--primary-black);
}

/* Portfolio Grid Item (Same as Home Page but refined) */
.portfolio-item {
    margin-bottom: 30px;
    display: block;
    /* Link wrap fix */
    text-decoration: none;
}

.portfolio-img-wrapper {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    /* Consistent Box Size */
    background: #eee;
}

.portfolio-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease, filter 0.6s ease;
    filter: grayscale(100%);
    /* Start Black & White */
}

/* Overlay Styling */
.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    /* Dark Overlay */
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: 0.4s ease;
}

.portfolio-overlay-content {
    text-align: center;
    color: white;
    transform: translateY(20px);
    transition: 0.4s ease;
}

/* Hover States */
.portfolio-item:hover .portfolio-img-wrapper img {
    filter: grayscale(0%);
    /* Color on Hover */
    transform: scale(1.1);
    /* Zoom Effect */
}

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

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

.project-title {
    color: var(--primary-black);
    font-weight: 800;
    margin-top: 15px;
    font-size: 1.2rem;
    text-transform: uppercase;
}

.project-cat {
    color: #888;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}