/* Course Grid Styles */

.courses-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-50);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

@media (min-width: 640px) {
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .courses-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .courses-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Course Card */
.course-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.course-card-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 aspect ratio */
    overflow: hidden;
    background: var(--color-gray-200);
}

.course-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.course-card:hover .course-card-image img {
    transform: scale(1.1);
}

/* Preview Badge */
.course-preview-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 2;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-success);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-lg);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* Preview Lesson Overlay */
.course-preview-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 1;
}

.course-card:hover .course-preview-overlay {
    opacity: 1;
}

.preview-lesson-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.preview-lesson-link:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.preview-lesson-link svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Course Card Body */
.course-card-body {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-category {
    display: inline-block;
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.course-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.course-title a:hover {
    color: var(--color-primary);
}

.course-instructor {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.course-instructor svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Course Rating */
.course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.rating-stars {
    display: flex;
    gap: 2px;
}

.rating-stars .star {
    color: var(--color-gray-300);
    font-size: 16px;
}

.rating-stars .star.filled {
    color: var(--color-accent);
}

.rating-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Course Meta */
.course-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    margin-top: auto;
    border-top: 1px solid var(--color-gray-200);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.course-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.course-meta-item svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Course Footer */
.course-card-footer {
    padding: var(--spacing-lg);
    padding-top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

/* Vertical layout: stack buttons with consistent size */
@media (max-width: 767px) {
    .course-card-footer {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .list-item-button {
        width: 100%;
        flex: none;
    }
    
    .list-item-button .tutor-btn {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 44px;
        box-sizing: border-box;
    }
    
    .course-enroll-btn {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 44px;
        box-sizing: border-box;
        text-align: center;
    }
}

/* Tablet: side by side with consistent size */
@media (min-width: 768px) and (max-width: 1023px) {
    .course-card-footer {
        gap: var(--spacing-md);
    }
    
    .list-item-button {
        flex: 1;
        min-width: 0;
    }
    
    .list-item-button .tutor-btn {
        width: 100%;
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        white-space: nowrap;
        min-height: 44px;
        box-sizing: border-box;
    }
    
    .course-enroll-btn {
        flex: 1;
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        white-space: nowrap;
        min-height: 44px;
        box-sizing: border-box;
    }
}

/* PC Mode: side by side with compact size */
@media (min-width: 1024px) {
    .course-card-footer {
        flex-wrap: nowrap;
        gap: var(--spacing-sm);
    }
    
    .list-item-button {
        flex: 1;
        min-width: 0;
    }
    
    .list-item-button .tutor-btn {
        width: 100%;
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        min-height: 40px;
        box-sizing: border-box;
    }
    
    .course-enroll-btn {
        flex: 1;
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
        white-space: nowrap;
        min-height: 40px;
        box-sizing: border-box;
    }
}

.course-price {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.course-price-free {
    color: var(--color-success);
}

.course-enroll-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    box-sizing: border-box;
}

.course-enroll-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.course-enroll-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Empty State */
.courses-empty {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-gray-600);
}

.courses-empty svg {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    fill: var(--color-gray-400);
}

/* Loading State */
.course-card-skeleton {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.skeleton {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.skeleton-image {
    width: 100%;
    padding-top: 56.25%;
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.skeleton-title {
    height: 24px;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-sm);
}

/* ========================================
   Tutor Button Custom Overrides
   ======================================== */

/* Override tutor-btn-outline-primary hover effect with fresh color */
.tutor-btn.tutor-btn-outline-primary:hover {
    background-color: var(--color-info) !important;
    border-color: var(--color-info) !important;
    color: var(--color-white) !important;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Ensure button in list-item also gets the custom hover */
.list-item-button .tutor-btn.tutor-btn-outline-primary:hover {
    background-color: var(--color-info) !important;
    border-color: var(--color-info) !important;
    color: var(--color-white) !important;
    transform: translateY(-2px);
}

/* ========================================
   Unified Button Sizing
   ======================================== */

/* Ensure both buttons have consistent sizing */
.list-item-button .tutor-btn,
.course-enroll-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-base);
    box-sizing: border-box;
}

/* Remove tutor-btn-block full width in footer to match sizing */
.course-card-footer .tutor-btn-block {
    width: auto !important;
    display: inline-flex !important;
}