/* --- Hero Section --- */
.portfolio-hero {
    background: linear-gradient(to bottom, rgba(var(--color-5-rgb) / 0.9), var(--color5)), url('https://placehold.co/1920x600/0f172a/1e293b?text=Innovation+Gallery');
    background-size: cover;
    background-position: center;
    padding: 8rem 0 4rem;
    position: relative;
}

/* --- Filter Navigation --- */
.filter-btn {
    background: transparent;
    border: 1px solid var(--color4);
    color: var(--color3);
    padding: 10px 25px;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    font-weight: 500;
}

    .filter-btn:hover,
    .filter-btn.active {
        background-color: var(--color1);
        color: var(--color2);
        border-color: var(--color1);
        box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    }

/* --- Portfolio Grid Items --- */
.portfolio-item {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

    /* Hide animation for filtering */
    .portfolio-item.hide {
        opacity: 0;
        transform: scale(0.8);
        pointer-events: none;
        position: absolute; /* Remove from flow */
        width: 0;
        padding: 0;
        margin: 0;
    }

.project-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--color4);
    transition: transform 0.4s ease;
}

    .project-card:hover {
        transform: translateY(-10px);
    }

.project-img-wrapper {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.project-card:hover .project-img {
    transform: scale(1.1);
}

/* Overlay Effect */
.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(var(--color-5-rgb) / 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
    backdrop-filter: blur(4px);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-content {
    padding: 1.5rem;
    position: relative;
    z-index: 2;
    background-color: var(--color4);
    border-top: 1px solid rgba(255,255,255,0.05);
}

.category-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--color1);
    color: var(--color2);
    font-size: 0.75rem;
    padding: 5px 12px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: bold;
    z-index: 2;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

/* --- Featured Project Section --- */
.featured-project-section {
    position: relative;
    overflow: hidden;
}

    /* Diagonal divider effect */
    .featured-project-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: -50%;
        width: 200%;
        height: 100%;
        background: linear-gradient(135deg, transparent 40%, rgba(var(--color-1-rgb), 0.05) 100%);
        pointer-events: none;
    }

.stat-box {
    border-left: 3px solid var(--color1);
    padding-left: 1.5rem;
}

/* --- Animations --- */
.zoom-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color1);
    color: var(--color2);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateY(20px);
    transition: all 0.4s ease;
    text-decoration: none;
}

.project-card:hover .zoom-btn {
    transform: translateY(0);
}