.portfolio-grid.detailed {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.portfolio-grid.detailed .portfolio-item {
    position: relative;
    aspect-ratio: 1/1;
    border-radius: 0;
    overflow: hidden;
}

.portfolio-grid.detailed .portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-grid.detailed .portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, #342dbabe, #0ef0f0be);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    border: 1rem solid transparent; /* 투명 테두리 */
    border-image: linear-gradient(135deg, #342dba, #0ef0ef); /* 그래디언트 적용 */
    border-image-slice: 1; /* 전체 테두리에 그래디언트 적용 */
}

.portfolio-grid.detailed .portfolio-content {
    text-align: center;
    color: white;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    padding: 2rem;
}

.portfolio-grid.detailed .portfolio-content h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: white;
}

.portfolio-grid.detailed .portfolio-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
}

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

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

.portfolio-grid.detailed .portfolio-item:hover img {
    transform: scale(1.1);
}

#next-trigger .ctt, 
#prev-trigger .ctt {
    display:none;
    text-align:center;
    padding:3rem;
    width:100%;
    animation: bgChange 2s infinite ease-in-out;
    transition: background-color 0.5s ease; /* 부드러운 전환 */
    color:#000;
    font-size:1.5rem;
    font-weight:400;
}
@keyframes bgChange {
    0% { background-color: #342dbabe; }
    50% { background-color: #0ef0f0be; }
    100% { background-color: #342dbabe; }
}

/* 반응형 */
@media (max-width: 768px) {
    .portfolio-grid.detailed {
        grid-template-columns: repeat(1, 1fr);
    }
}