/* ==========================================================================
   Classroom / Courses
   - Pages couvertes : liste des cours, édition, détail (show)
   - Conventions : classes HTML (pas d'ID), responsive via media queries
   ========================================================================== */

/* ==========================================================================
   Courses - Index / Listing
   ========================================================================== */

.courses-hero {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-2xl);
    text-align: center;
}

.courses-hero h1 {
    font-size: clamp(36px, 6vw, 56px);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.courses-hero p {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.courses-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.courses-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.courses-filters {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    pointer-events: none;
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    cursor: pointer;
}

.courses-grid {
    margin-top: var(--spacing-2xl);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.course-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    border-color: var(--color-primary);
}

.course-card-header {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.course-card-title {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 var(--spacing-sm) 0;
    color: white;
}

.course-card-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 13px;
    opacity: 0.9;
}

.course-card-body {
    padding: var(--spacing-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-card-description {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    flex: 1;
    /* Clamp pour conserver des cartes homogènes (3 lignes max) */
    display: -webkit-box;
    line-clamp: 3;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.course-rating .stars i {
    font-size: 14px;
    color: #ffc107;
}

.course-rating-count {
    font-size: 12px;
    color: var(--color-text-secondary);
}

.course-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon-only {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon-only:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-xl);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-published {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
}

.status-draft {
    background: rgba(255, 152, 0, 0.2);
    color: #ff9800;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-xl);
    color: var(--color-text-secondary);
}

.empty-state i {
    color: var(--color-border);
}

.empty-state-icon {
    font-size: 3rem;
    margin: var(--radius-lg);
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}


.current {
    color: var(--color-primary);
    background-color: var(--color-card-bg);
    border-color: var(--color-card-border);
}

/* --------------------------------------------------------------------------
   Responsive (Courses index)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: 1fr;
    }

    .courses-header {
        flex-direction: column;
        align-items: stretch;
    }

    .courses-filters {
        width: 100%;
    }

    .filter-select {
        flex: 1;
    }
}

/* ==========================================================================
   Courses - Edition
   ========================================================================== */
.course-edit-hero {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.course-edit-container {
    max-width: 900px;
    margin: 0 auto;
}

.course-edit-header h1 {
    font-size: clamp(28px, 4vw, 36px);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.course-edit-header p {
    color: var(--color-text-secondary);
    font-size: 16px;
}

.course-form-section {
    max-width: 900px;
    margin: var(--spacing-3xl) auto;
    padding: 0 var(--spacing-xl);
}

.course-form-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.form-section-title {
    font-size: 20px;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.form-section-title i {
    color: var(--color-primary);
}

.form-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group small {
    color: var(--color-text-secondary);
    font-size: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.form-actions .btn {
    flex: 1;
}

.danger-zone {
    background: rgba(244, 67, 54, 0.05);
    border: 1px solid rgba(244, 67, 54, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.danger-zone h3 {
    color: #f44336;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.danger-zone p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Responsive (Course edit)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }
}


/* ==========================================================================
   Course - Détail (show)
   ========================================================================== */
.course-hero {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-3xl);
    border-bottom: 1px solid var(--color-border);
}

.course-container {
    max-width: 1200px;
    margin: 0 auto;
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.course-info {
    flex: 1;
}

.course-title {
    font-size: clamp(32px, 5vw, 48px);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.course-meta {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin: var(--spacing-lg) 0;
    color: var(--color-text-secondary);
}

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

.meta-item i {
    color: var(--color-primary);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stars {
    display: flex;
    gap: 4px;
}

.stars i {
    color: #ffc107;
    font-size: 20px;
}

.rating-count {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.course-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.course-content {
    max-width: 1200px;
    margin: var(--spacing-3xl) auto;
    padding: 0 var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-3xl);
}

.main-content {
    min-width: 0;
}

.course-section {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 24px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.section-title i {
    color: var(--color-primary);
}

.course-description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.pdf-viewer {
    width: 100%;
    height: 600px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.sidebar-title {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.info-list {
    list-style: none;
}

.info-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.info-list li:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--color-text-secondary);
}

.info-value {
    color: var(--color-text-primary);
    font-weight: 600;
}

.comments-section {
    margin-top: var(--spacing-3xl);
}

.comment-form {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-weight: 600;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.rating-input {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 24px;
}

.rating-input i {
    cursor: pointer;
    color: var(--color-border);
    transition: color var(--transition-fast);
}

.rating-input i:hover,
.rating-input i.active {
    color: #ffc107;
}

.comment-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.comment-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.author-info h4 {
    margin: 0;
    font-size: 16px;
    color: var(--color-text-primary);
}

.comment-date {
    font-size: 12px;
    color: var(--color-text-secondary);
}

.comment-rating {
    display: flex;
    gap: 4px;
}

.comment-rating i {
    font-size: 14px;
    color: #ffc107;
}

.comment-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.comment-actions {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 14px;
}

.comment-action {
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.comment-action:hover {
    color: var(--color-primary);
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    max-width: 100px;
    text-align: center;
    margin-top: var(--spacing-lg);
}

.status-public {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
}

.status-draft {
    background: rgba(255, 152, 0, 0.2);
    color: #ff9800;
}

.status-pending {
    background: rgba(33, 150, 243, 0.2);
    color: #2196f3;
}

.status-deleted {
    background: rgba(244, 67, 54, 0.2);
    color: #f44336;
}

.keyword-tag {
    display: inline-block;
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    margin: 0 2px;
}

/* --------------------------------------------------------------------------
   Responsive (Course show)
   -------------------------------------------------------------------------- */
@media (max-width: 968px) {
    .course-content {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .course-header {
        flex-direction: column;
    }

    .courses-filters {
        display: grid;
    }

    .courses-filters select[name="lang"] {
        grid-column: 1 / 2;
        grid-row: 2 / 3;
    }

    .courses-filters select[name="status"] {
        grid-column: 2 / 3;
        grid-row: 2 / 3;
    }
}

/* ==========================================================================
   Responsive - Affinage smartphones / petites tablettes
   - On ajoute des overrides plus spécifiques que les breakpoints existants.
   ========================================================================== */

@media (max-width: 576px) {

    /* Courses index */
    .courses-hero {
        padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
    }

    .courses-container {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .courses-header {
        gap: var(--spacing-md);
    }

    .search-box {
        min-width: 0;
        width: 100%;
    }

    .courses-filters {
        width: 100%;
    }

    .filter-select {
        width: 100%;
    }

    .course-card-header {
        padding: var(--spacing-lg);
        min-height: unset;
    }

    .course-card-body {
        padding: var(--spacing-lg);
    }

    .course-card-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    /* Course edit */
    .course-form-section {
        padding: 0 var(--spacing-lg);
    }

    .course-form-card {
        padding: var(--spacing-xl);
    }

    .form-actions {
        gap: var(--spacing-sm);
    }

    /* Course show */
    .course-hero {
        padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
    }

    .course-content {
        margin: var(--spacing-2xl) auto;
        padding: 0 var(--spacing-lg);
        gap: var(--spacing-2xl);
    }

    .course-meta {
        gap: var(--spacing-md);
    }

    .stars i {
        font-size: 18px;
    }

    .course-actions {
        width: 100%;
    }

    .course-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .pdf-viewer {
        height: 55vh;
        min-height: 320px;
    }

    .comment-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .comment-actions {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .author-avatar {
        width: 32px;
        height: 32px;
    }

    .info-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .course-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .comment-form {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

@media (min-width: 577px) and (max-width: 1024px) {

    /* Tablets: resserrer légèrement sans casser la mise en page */
    .course-content {
        padding: 0 var(--spacing-lg);
    }

    .pdf-viewer {
        height: 60vh;
        min-height: 420px;
    }
}


/* ==========================================================================
   Course - Creation (new)
   ========================================================================== */
.course-create-hero {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.course-create-container {
    max-width: 900px;
    margin: 0 auto;
}

.course-create-header h1 {
    font-size: clamp(28px, 4vw, 36px);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.course-create-header p {
    color: var(--color-text-secondary);
    font-size: 16px;
}

.course-form-section {
    max-width: 900px;
    margin: var(--spacing-3xl) auto;
    padding: 0 var(--spacing-xl);
}

.course-form-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl);
}

.form-section-title {
    font-size: 20px;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.form-section-title i {
    color: var(--color-primary);
}

.form-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group small {
    color: var(--color-text-secondary);
    font-size: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.form-actions .btn {
    flex: 1;
}

.form-error {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    color: #f44336;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-top: var(--spacing-sm);
}

.required-indicator {
    color: #f44336;
    margin-left: 4px;
}

/* --------------------------------------------------------------------------
   Responsive (Create course)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }
}