/**
 * Active Courses Block - Enhanced Frontend Styles
 * Using CSS Custom Properties for easier customization
 */

/* ===================================
   CSS Variables
   =================================== */
   :root {
    --cms-primary-color: var(--cms-primary, #1245a6);
    --cms-primary-hover: var(--cms-primary-dark, #0d3378);
    --cms-danger-color: var(--cms-danger, #b91c1c);
    --cms-text-color: #1e1e1e;
    --cms-text-secondary: var(--cms-gray-500, #64748b);
    --cms-border-color: var(--cms-gray-200, #e2e8f0);
    --cms-background: #fff;
    --cms-background-alt: var(--cms-gray-50, #f8fafc);
    --cms-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --cms-shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.15);
    --cms-transition: all 0.3s ease;
}

/* ===================================
   Block Wrapper
   =================================== */
.cms-courses-wrapper {
    width: 100%;
    margin: 2rem 0;
    clear: both;
}

/* Loading state cho wrapper */
.cms-courses-wrapper.is-loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Pagination nằm ngoài grid */
.cms-courses-wrapper > .cms-pagination {
    margin-top: 2rem;
}

/* Alignment */
.cms-courses-wrapper.alignwide {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.cms-courses-wrapper.alignfull {
    max-width: 100%;
    width: 100vw;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    padding: 2rem;
}

/* ===================================
   Block Container with CSS Grid
   =================================== */
.cms-courses-wrapper .cms-courses-block {
    width: 100%;
    margin-bottom: 2rem;
}

.cms-courses-wrapper .cms-courses-block.cms-layout-grid {
    display: grid;
    grid-template-columns: repeat(var(--cms-columns, 3), 1fr);
    gap: var(--cms-gap, 30px);
}

.cms-courses-wrapper .cms-courses-block.cms-layout-list {
    display: flex;
    flex-direction: column;
    gap: var(--cms-gap, 30px);
}

/* Equal Height Cards */
.cms-courses-wrapper .cms-courses-block.has-equal-height {
    align-items: stretch;
}

.cms-courses-wrapper .cms-courses-block.has-equal-height .cms-course-card {
    height: 100%;
}

/* ===================================
   Course Card
   =================================== */
.cms-courses-wrapper .cms-course-card {
    display: flex;
    flex-direction: column;
    background: var(--cms-background);
    transition: var(--cms-transition);
    overflow: hidden;
}

/* Card Styles */
.cms-courses-wrapper .cms-course-card.cms-card-style-card {
    border: 1px solid var(--cms-border-color);
    border-radius: 8px;
}

.cms-courses-wrapper .cms-course-card.cms-card-style-shadow {
    border-radius: 8px;
    box-shadow: var(--cms-shadow);
}

.cms-courses-wrapper .cms-course-card.cms-card-style-simple {
    border-bottom: 1px solid var(--cms-border-color);
    padding-bottom: 1.5rem;
}

.cms-courses-wrapper .cms-course-card.cms-card-style-overlay {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

.cms-courses-wrapper .cms-card-style-overlay .cms-course-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    color: #fff;
    padding: 2rem 1.5rem 1.5rem;
}

.cms-courses-wrapper .cms-card-style-overlay .cms-course-title a,
.cms-courses-wrapper .cms-card-style-overlay .cms-course-excerpt {
    color: #fff;
}

/* Hover Effects */
.cms-courses-wrapper .cms-courses-block.has-hover-effect .cms-course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--cms-shadow-hover);
}

.cms-courses-wrapper .cms-courses-block.has-hover-effect .cms-card-style-simple:hover {
    transform: none;
    box-shadow: none;
    border-bottom-color: var(--cms-primary-color);
}

/* List Layout Specific */
.cms-courses-wrapper .cms-layout-list .cms-course-card {
    flex-direction: row;
    align-items: center;
    padding: 0 1.5rem;
}

.cms-courses-wrapper .cms-layout-list .cms-course-image {
    flex: 0 0 300px;
    max-width: 300px;
    height: auto;
    display: flex;
    align-items: center;
}

.cms-courses-wrapper .cms-layout-list .cms-course-image a {
    display: block;
    width: 100%;
    height: auto;
    padding-bottom: 0 !important;
}

.cms-courses-wrapper .cms-layout-list .cms-course-image img {
    position: static;
    width: 100%;
    height: auto;
    display: block;
}

.cms-courses-wrapper .cms-layout-list .cms-course-content {
    flex: 1;
    min-width: 0;
}

/* ===================================
   Course Image
   =================================== */
.cms-courses-wrapper .cms-course-image {
    position: relative;
    overflow: hidden;
    background: var(--cms-background-alt);
}

.cms-courses-wrapper .cms-course-image a {
    display: block;
    width: 100%;
    height: 100%;
}

.cms-courses-wrapper .cms-course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    display: block;
}

.cms-courses-wrapper .cms-course-card:hover .cms-course-image img {
    transform: scale(1.05);
}

/* Image Ratios - Grid Layout */
.cms-courses-wrapper .cms-layout-grid .cms-course-image.cms-ratio-16-9 {
    padding-bottom: 56.25%;
}

.cms-courses-wrapper .cms-layout-grid .cms-course-image.cms-ratio-4-3 {
    padding-bottom: 75%;
}

.cms-courses-wrapper .cms-layout-grid .cms-course-image.cms-ratio-1-1 {
    padding-bottom: 100%;
}

.cms-courses-wrapper .cms-layout-grid .cms-course-image.cms-ratio-3-2 {
    padding-bottom: 66.67%;
}

.cms-courses-wrapper .cms-layout-grid .cms-course-image.cms-ratio-21-9 {
    padding-bottom: 42.86%;
}

.cms-courses-wrapper .cms-layout-grid .cms-course-image img {
    position: absolute;
    top: 0;
    left: 0;
}

/* Original ratio - no padding-bottom */
.cms-courses-wrapper .cms-course-image.cms-ratio-original {
    padding-bottom: 0;
}

.cms-courses-wrapper .cms-course-image.cms-ratio-original img {
    position: static;
    height: auto;
}

/* ===================================
   Course Content
   =================================== */
.cms-courses-wrapper .cms-course-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

/* Program Badge */
.cms-courses-wrapper .cms-course-program {
    margin-bottom: 0.5rem;
}

.cms-courses-wrapper .cms-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--cms-primary-color);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    line-height: 1.4;
}

/* Title */
.cms-courses-wrapper .cms-course-title {
    margin: 0;
    line-height: 1.4;
    font-weight: 600;
}

.cms-courses-wrapper .cms-course-title a {
    color: var(--cms-text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.cms-courses-wrapper .cms-course-title a:hover,
.cms-courses-wrapper .cms-course-title a:focus {
    color: var(--cms-primary-color);
    outline: none;
}

/* Excerpt */
.cms-courses-wrapper .cms-course-excerpt {
    color: var(--cms-text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

/* ===================================
   Course Meta
   =================================== */
.cms-courses-wrapper .cms-course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--cms-border-color);
}

.cms-courses-wrapper .cms-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--cms-text-secondary);
    line-height: 1.4;
}

.cms-courses-wrapper .cms-meta-item svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--cms-primary-color);
}

.cms-courses-wrapper .cms-meta-fee {
    font-weight: 700;
    color: var(--cms-danger-color);
}

.cms-courses-wrapper .cms-currency {
    font-weight: 400;
    font-size: 0.85em;
}

.cms-courses-wrapper .cms-meta-students.cms-full {
    color: var(--cms-danger-color);
}

.cms-courses-wrapper .cms-full-badge {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    background: var(--cms-danger-color);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 3px;
    margin-left: 0.5rem;
    text-transform: uppercase;
}

/* ===================================
   Course Footer
   =================================== */
.cms-courses-wrapper .cms-course-footer {
    margin-top: auto;
    padding-top: 1rem;
}

.cms-courses-wrapper .cms-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--cms-transition);
    cursor: pointer;
    border: none;
    line-height: 1.4;
}

.cms-courses-wrapper .cms-button-primary {
    background: var(--cms-primary-color);
    color: #fff;
    border: 2px solid var(--cms-primary-color);
}

.cms-courses-wrapper .cms-button-primary:hover,
.cms-courses-wrapper .cms-button-primary:focus {
    background: var(--cms-primary-hover);
    border-color: var(--cms-primary-hover);
    transform: translateX(3px);
    color: #fff;
    text-decoration: none;
    outline: none;
}

.cms-courses-wrapper .cms-button svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.cms-courses-wrapper .cms-button:hover svg,
.cms-courses-wrapper .cms-button:focus svg {
    transform: translateX(3px);
}

/* ===================================
   Empty State
   =================================== */
.cms-courses-wrapper .cms-no-courses {
    padding: 3rem;
    text-align: center;
    background: var(--cms-background-alt);
    border-radius: 8px;
    color: var(--cms-text-secondary);
    font-size: 1.1rem;
    border: 2px dashed var(--cms-border-color);
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet Landscape */
@media (max-width: 1024px) {
    .cms-courses-wrapper .cms-courses-block.cms-layout-grid {
        grid-template-columns: repeat(var(--cms-columns-tablet, 2), 1fr);
    }
    
    .cms-courses-wrapper .cms-layout-list .cms-course-image {
        flex: 0 0 250px;
        max-width: 250px;
    }
}

/* Tablet Portrait */
@media (max-width: 768px) {
    .cms-courses-wrapper .cms-courses-block.cms-layout-grid {
        grid-template-columns: repeat(var(--cms-columns-mobile, 1), 1fr);
    }
    
    .cms-courses-wrapper .cms-layout-list .cms-course-card {
        flex-direction: column;
    }
    
    .cms-courses-wrapper .cms-layout-list .cms-course-image {
        flex: 0 0 auto;
        max-width: 100%;
    }
    
    .cms-courses-wrapper .cms-course-meta {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .cms-courses-wrapper.alignfull {
        padding: 1.5rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .cms-courses-wrapper {
        margin: 1.5rem 0;
    }
    
    .cms-courses-wrapper .cms-courses-block {
        margin-bottom: 1.5rem;
    }
    
    .cms-courses-wrapper .cms-button {
        width: 100%;
        justify-content: center;
    }
    
    .cms-courses-wrapper.alignfull {
        padding: 1rem;
    }
}

/* ===================================
   Accessibility
   =================================== */
.cms-courses-wrapper .cms-course-card:focus-within {
    outline: 2px solid var(--cms-primary-color);
    outline-offset: 2px;
}

.cms-courses-wrapper .cms-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .cms-courses-wrapper .cms-course-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    .cms-courses-wrapper .cms-button {
        display: none;
    }
}