.course-schedule {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.period-block {
    margin-bottom: 40px;
    background: #f5f5f5;
    padding: 20px;
    /* border-radius: 8px; */
    /* box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); */
    transition: transform 0.2s ease;
}
/* .period-block:hover {
    transform: translateY(-2px);
} */
.period-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    /* border-bottom: 2px solid #ddd; */
}
.period-title {
    color: #333;
    margin: 0;
    font-size: 1.5em;
    font-weight: 600;
}
.period-time {
    color: #666;
    font-style: italic;
    font-size: 0.9em;
}
.course-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin: 0;
    padding: 0;
}
.course-item {
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.course-item:hover {
    transform: translateX(5px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}
.course-link {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
}
.course-link:hover .course-title {
    color: #0073aa;
}
.course-details {
    padding: 15px;
}
.course-title {
    font-size: 1.1em;
    font-weight: 600;
    margin: 0 0 10px;
    color: #333;
    transition: color 0.2s ease;
}
.course-meta {
    font-size: 0.9em;
    color: #666;
}
.course-meta .teacher {
    margin-bottom: 5px;
}
.course-meta .room {
    font-weight: 500;
}
.no-courses {
    padding: 20px;
    background: #fff;
    border-radius: 6px;
    color: #666;
    font-style: italic;
    text-align: center;
    grid-column: 1/-1;
}
.course-schedule-header {
    margin-bottom: 30px;
    text-align: center;
}
.course-schedule-header h2 {
    color: #333;
    font-size: 2em;
    margin: 0 0 10px;
}
/* .grade-specific .period-block {
    border-left: 4px solid #0073aa;
} */
.grade-specific .course-item {
    background: #fff;
    border: 1px solid #eee;
}
.grade-specific .course-link:hover {
    text-decoration: none;
     /* background: #ccc; */
    /* background: #f8f9fa; */
    color: #f2f00c
}
.grade-specific .course-link:hover .course-title {
    color: #0073aa;
}
@media (max-width: 768px) {
    .course-schedule {
        padding: 10px;
    }
    .period-block {
        padding: 15px;
        margin-bottom: 20px;
    }
    .period-header {
        flex-direction: column;
        text-align: center;
    }
    .period-title {
        margin-bottom: 5px;
    }
    .course-list {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 480px) {
    .period-block {
        margin-bottom: 15px;
    }
    .course-details {
        padding: 12px;
    }
    .course-title {
        font-size: 1em;
    }
    .course-meta {
        font-size: 0.85em;
    }
}