/* Course Grid Styles */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 0 -0.5rem;
}

.course-grid-item {
    padding: 0.5rem;
    transition: all 0.3s ease;
}

.course-card {
    background: #ffffff;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.course-card .card-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-card .card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 3.1em;
}

.course-card .card-text {
    color: #6b7280;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.course-card .card-footer {
    background: transparent;
    border-top: 1px solid #f3f4f6;
    padding: 1rem 1.25rem;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.course-instructor {
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    color: #6b7280;
}

.course-instructor img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 0.5rem;
    object-fit: cover;
}

.course-rating {
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    color: #f59e0b;
    font-weight: 600;
}

.course-rating i {
    margin-right: 0.25rem;
}

.course-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1f2937;
}

.course-price.original-price {
    text-decoration: line-through;
    color: #9ca3af;
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 767.98px) {
    .course-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    
    .course-card .card-title {
        font-size: 1rem;
    }
}

/* Loading animation */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.course-card.loading {
    position: relative;
    overflow: hidden;
    background: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite linear;
}

.course-card.loading * {
    visibility: hidden;
}