body {
    font-family: 'Pretendard', sans-serif;
}

.masthead {
    height: 100vh;
    min-height: 500px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.pexels.com/photos/546819/pexels-photo-546819.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2');
    background-color: #212529;
    /* 이미지 로딩 실패 시 배경색 */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
}

section {
    padding: 8rem 0;
}

.portfolio-box {
    position: relative;
    display: block;
}

.portfolio-box .portfolio-box-caption {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    width: 100%;
    height: 100%;
    position: absolute;
    bottom: 0;
    text-align: center;
    opacity: 0;
    color: #fff;
    background: rgba(22, 22, 22, 0.7);
    transition: opacity 0.25s ease;
    text-align: center;
}

.portfolio-box:hover .portfolio-box-caption {
    opacity: 1;
}

.portfolio-box .portfolio-box-caption .project-category {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.portfolio-box .portfolio-box-caption .project-name {
    font-size: 1.2rem;
}

.bg-dark {
    background-color: #212529 !important;
}

.text-white {
    color: #fff !important;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.5) !important;
}

.text-primary {
    color: #0d6efd !important;
}

.text-muted {
    color: #6c757d !important;
}

.masthead h1 {
    font-weight: 700 !important;
}

.masthead .lead {
    font-weight: 400;
}