/* cards.css */
.content-card {
    border: 0;
    border-radius: 1rem;
    box-shadow: 0 0.25rem 1rem rgba(33, 37, 41, 0.08);
}

.content-card--active-member {
    border: 2px solid #fd7e14;
    background: #fff;
    box-shadow: 0 0.35rem 1.2rem rgba(253, 126, 20, 0.2);
}

.content-card--upcoming-member {
    border: 2px solid #75a685;
    background: #fff;
    box-shadow: 0 0.35rem 1.2rem rgba(117, 166, 133, 0.18);
}

.content-card .card-body {
    padding: 1.5rem;
}

.challenge-card-title {
    min-height: 3.25rem;
}

.challenge-card-title-line {
    display: block;
    overflow: hidden;
    color: inherit;
    font: inherit;
    line-height: 1.5rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.challenge-card-title-line:hover,
.challenge-card-title-line:focus {
    color: inherit;
}

.challenge-card-title-line + .challenge-card-title-line {
    margin-top: 0.25rem;
}

.challenge-list-card:not(.content-card--active-member):not(.content-card--upcoming-member) {
    border: 1px solid #dee2e6;
}

.challenge-detail-title-line + .challenge-detail-title-line {
    margin-top: 0.3rem;
}

.content-card-summary {
    color: #6c757d;
    min-height: 3rem;
}

.content-card-meta {
    color: #6c757d;
    font-size: 0.95rem;
}

.two-line-container {
    max-width: 90%; /* 기본 여백 줄이기 */
    margin: 0 auto; /* 중앙 정렬 */
    padding: 0; /* 여백 제거 */
    display: flex; /* 플렉스 박스 사용 */
    flex-wrap: wrap; /* 줄바꿈 허용 */
    gap: 1rem; /* 카드 간 간격 */
    justify-content: center; /* 중앙 정렬 */
}

.two-line-container .card {
    flex: 1 1 calc(50% - 1rem); /* PC에서는 한 줄에 2개 */
    max-width: 350px; /* 카드 최대 너비 */
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    text-align: left;
    display: flex;
    flex-direction: column;
}
.two-line-container .card-header {
    background-color: #f5f5f5;
    padding: 1rem;
    font-weight: bold;
    font-size: 1.2rem;
    color: #333;
}
.two-line-container .card-body {
    padding: 1rem;
    flex-grow: 1;
}
.two-line-container .card-footer {
    padding: 0.5rem 1rem;
    text-align: right;
    background-color: #f9f9f9;
    border-top: 1px solid #ddd;
}
.two-line-container .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: 4px;
    display: inline-block;
    margin: 0.2rem 0;
}
.two-line-container .btn-primary {
    background-color: #007bff;
    color: #fff;
    border: none;
}
.two-line-container .btn-primary:hover {
    background-color: #0056b3;
}
.two-line-container .btn-secondary {
    background-color: #6c757d;
    color: #fff;
    border: none;
}
.two-line-container .btn-secondary:hover {
    background-color: #5a6268;
}
.two-line-container .btn-disabled {
    background-color: #ccc;
    color: #666;
    pointer-events: none;
    cursor: default;
}


@media (max-width: 768px) {
    .two-line-container {
        max-width: 100%; /* 모바일에서 전체 화면 사용 */
        gap: 0.5rem; /* 카드 간격 줄이기 */
    }
    .two-line-container .card {
        margin: 1rem 0.5rem; /* 카드 외부 여백 제거 */
        flex: 1 1 100%; /* 모바일에서는 한 줄에 1개 */
        max-width: 100%; /* 모바일 화면 최대 너비 */
    }
}