/* Hero section */
.portfolio-hero {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--primary-color);
}

.portfolio-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: var(--secondary-color-light);
    margin-bottom: 1rem;
}

.portfolio-hero h2 {
    font-size: 2rem;
    font-weight: 500;
    color: var(--secondary-color-light);
    margin-bottom: 1rem;
}

.portfolio-hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    color: #FFFFFF;
}

/* Portfolio grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
    gap: 1rem;
    margin: 2rem auto;
    max-width: 1600px;
    padding: 0 1rem;
}

/* Portfolio items */
.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

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

/* Overlay */
.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 2rem;
    font-weight: bold;
    background: rgba(1, 22, 39, 0.2);
    transition: background var(--transition-speed), font-size var(--transition-speed);
}

/* Hover */
.portfolio-item:hover img {
    opacity: 0.7;
}

.portfolio-item:hover .portfolio-overlay {
    background: rgba(1, 22, 39, 0.5);
    font-size: 2.3rem;
}

/* Responsive styling */
@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 0;
    }

    .portfolio-item {
        border-radius: 0;
    }

    .portfolio-overlay {
        font-size: 1.5rem;
    }

    .portfolio-hero h2 {
        font-size: 1.4rem;
    }

    .portfolio-hero p {
        font-size: 1rem;
    }
}