/* In style/graphic_design.css */

.page-container {
    width: 90%;
    max-width: 1200px;
    margin: 40px auto;
}

.page-title {
    font-size: 36px;
    font-weight: 400;
    margin-bottom: 30px;
    color: var(--text-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 60px;
    align-items: start;
}

.portfolio-nav nav a {
    display: block;
    font-size: 18px;
    color: #888;
    text-decoration: none;
    margin-bottom: 25px;
    font-weight: 400;
    transition: color 0.3s ease;
}

.portfolio-nav nav a:hover {
    color: var(--text-color);
}

.portfolio-nav nav a.active {
    color: var(--text-color);
    font-weight: bold;
}

.portfolio-content {
    position: relative;
    min-height: 500px;
}

.portfolio-item {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    transition: opacity 0.4s ease-in-out;
    display: none;
}

.portfolio-item.active {
    display: block;
    position: relative;
    opacity: 1;
    visibility: visible;
}

.portfolio-item img {
    width: 100%;
    height: auto;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-radius: 4px;
}

.item-description h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.item-description p {
    font-size: 18px;
    line-height: 1.6;
    color: var(--text-color);
}

/* --- NEW GALLERY CONTAINER STYLES --- */
.gallery-container {
    margin-top: 80px; 
    border-top: 1px solid #eee; /* Visual separator */
    padding-top: 40px;
}

.gallery-title {
    font-size: 28px;
    font-weight: 400;
    margin-bottom: 30px;
    color: var(--text-color);
}

/* --- Gallery Set Logic --- */
.gallery-set {
    display: none; /* Hide all galleries by default */
}

.gallery-set.active {
    display: grid; /* Show the active gallery as a grid */
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

/* --- Grid Item Styles (Same as before) --- */
.grid-item {
    position: relative;
    display: block;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.grid-item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease-out;
}

.item-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease-out;
}
.item-overlay h3 { font-size: 22px; margin: 0; transform: translateY(10px); transition: transform 0.4s ease-out; }
.item-overlay p { margin: 5px 0 0; transform: translateY(10px); transition: transform 0.4s ease-out 0.1s; }
.grid-item:hover img { transform: scale(1.05); }
.grid-item:hover .item-overlay { opacity: 1; }
.grid-item:hover .item-overlay h3, .grid-item:hover .item-overlay p { transform: translateY(0); }


/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr; /* Stack columns on mobile */
    }

    .gallery-set.active {
        grid-template-columns: 1fr; /* Single column gallery on mobile */
    }
}