.project-card {
    position: relative;
    display: block;
    width: 200px;          /* 카드 크기 */
    border-radius: 12px;
    overflow: hidden;
}

.project-image {
    width: 100%;
    display: block;
    transition: filter 0.3s ease;
}

/* 오버레이 */
.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;

    opacity: 0;
    transition: opacity 0.3s ease;
}

/* GitHub 아이콘 */
.github-icon {
    width: 48px;
    height: 48px;
}

/* Hover 효과 */
.project-card:hover .project-image {
    filter: blur(3px) brightness(0.8);
}

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