/* 講座課程 */
.courses {
    padding: 80px 0;
    background: var(--white);
}

.courses-grid {
    display: flex;
    gap: 2rem;
}

.courses .new-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 48px;
    position: relative;
    z-index: 1;
}

.course-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
    flex: 1 1 100%;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-content {
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    gap: 1.25rem;
}

.course-date {
    font-size: 0.875rem;
    color: #666666;
}

.course-title {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-color);
    line-height: 1.2;
    text-wrap: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.course-description {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.4;
    color: #666666;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2; /* number of lines to show */
           line-clamp: 2;
    -webkit-box-orient: vertical;
}

.course-status {
    display: inline-flex;
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid #BDBDBD;
    font-size: 12px;
    font-weight: 400;
    width: fit-content;
    min-width: 80px;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.course-status.active {
    color: #00796B;
}

.course-status.ended {
    color: #0F121461;
}

/* Media Queries */
@media (max-width: 1024px) {
    .courses .new-container {
        max-width: 100%;
    }

    .courses-grid {
        gap: 1rem;
        max-width: 100%;
    }
}

@media (max-width: 720px) {
    .courses {
        padding: 60px 0;
    }

    .courses-grid {
        gap: 1rem;
        width: 100%;
    }

    .course-content {
        padding: 1rem;
        gap: 0.75rem;
    }

    .course-title {
        font-size: 1rem;
    }

    .course-image {
        height: 180px;
    }

    .course-status {
        min-width: 70px;
        padding: 4px 6px;
    }
}

@media (max-width: 640px) {
    .courses {
        padding: 40px 0;
    }

    .courses-grid {
        display: flex;
        flex-direction: column;
    }

    .course-title {
        font-size: 1.125rem;
    }

    .course-description {
        font-size: 0.875rem;
    }
}