@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #A78873;
    --secondary-color: #5E463A;
    --accent-color: #A78873;
    --ai-color: #A78873;
    --dark-color: #171614;
    --light-color: #fff;
    --text-color: #5E463A;
    --border-color: #e2e8f0;
    --shadow: 0 2px 10px rgba(167, 136, 115, 0.15);
    --shadow-md: 0 4px 16px rgba(167, 136, 115, 0.2);
    --shadow-lg: 0 10px 40px rgba(94, 70, 58, 0.25);
}

.admin-wrapper {
    display: flex;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: 'Poppins', sans-serif;
    position: relative;
    overflow-x: hidden;
}

/* Sidebar */
.admin-sidebar {
    width: 280px;
    background: linear-gradient(180deg, #171614 0%, #372821 100%);
    color: var(--light-color);
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: -4px 0 20px rgba(23, 22, 20, 0.3);
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    color: var(--light-color);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
}

.sidebar-header h2 i {
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 1rem 1.5rem;
    color: var(--light-color);
    text-decoration: none;
    transition: all 0.3s;
    border-right: 3px solid transparent;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(167, 136, 115, 0.2);
    border-right-color: var(--primary-color);
    color: var(--light-color);
    transform: translateX(5px);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

/* Main Content */
.admin-main {
    margin-right: 280px;
    flex: 1;
    padding: 2rem;
    min-height: 100vh;
    width: calc(100% - 280px);
    box-sizing: border-box;
}

.admin-section {
    display: none;
}

.admin-section.active {
    display: block;
}

.section-header {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    position: relative;
}

.subsection-title {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin: 2rem 0 1rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 70px;
    height: 70px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-color);
    font-size: 1.8rem;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark-color);
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Courses Stats */
.courses-stats {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.course-stat-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.course-stat-item:last-child {
    border-bottom: none;
}

.course-stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.course-stat-name {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--dark-color);
}

.course-stat-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.course-stat-metric {
    text-align: center;
}

.course-stat-metric-label {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.course-stat-metric-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Courses List */
.courses-list {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
}

.courses-list:empty::before {
    content: attr(data-empty-text);
    display: block;
    text-align: center;
    padding: 3rem;
    color: var(--text-color);
    font-size: 1.1rem;
    background: var(--light-color);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.course-item {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    gap: 1.5rem;
}

.course-item:hover {
    transform: translateX(-5px);
    box-shadow: var(--shadow-lg);
}

.course-item-info {
    flex: 1;
    min-width: 0;
}

.course-item-info h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
    word-wrap: break-word;
}

.course-item-info p {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    word-wrap: break-word;
}

.course-item-meta {
    display: flex;
    gap: 2rem;
    font-size: 0.9rem;
    color: var(--text-color);
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.course-item-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-item-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn-edit,
.btn-delete {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-edit {
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border-radius: 8px;
}

.btn-edit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-delete {
    background: #dc3545;
    color: var(--light-color);
}

.btn-delete:hover {
    background: #c82333;
}

.btn-add {
    padding: 0.9rem 2rem;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: flex !important;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    visibility: visible !important;
    opacity: 1 !important;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.btn-add:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Settings Form */
.settings-form {
    background: var(--light-color);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    max-width: 900px;
}

.settings-form h2 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.settings-form h2:first-child {
    margin-top: 0;
}

.btn-save {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.btn-save:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Course Modal */
.modal-large {
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
}

.section-item-editor {
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.section-item-editor:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.section-item-editor .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    align-items: start;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .section-item-editor .form-row {
        grid-template-columns: 1fr;
    }
}

.btn-remove-section {
    background: #dc3545;
    color: var(--light-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-remove-section:hover {
    background: #c82333;
}

.btn-add-section {
    width: 100%;
    padding: 0.8rem;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 1rem;
    transition: all 0.3s ease;
}

.btn-add-section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-secondary {
    padding: 0.8rem 1.5rem;
    background: var(--border-color);
    color: var(--dark-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s;
}

.btn-secondary:hover {
    background: #ccc;
}

/* File Upload Styles */
.file-upload-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-upload {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    width: fit-content;
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-upload-small {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.btn-upload-small:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.media-preview {
    margin-top: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 10px;
    border: 2px dashed var(--border-color);
}

.preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.btn-remove-preview {
    padding: 0.5rem 1rem;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-remove-preview:hover {
    background: #c82333;
    transform: translateY(-1px);
}

/* Modal Styling */
#courseModal .modal-content {
    background: var(--light-color);
}

#courseModal .form-group label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    display: block;
}

#courseModal .form-group input,
#courseModal .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
}

#courseModal .form-group input:focus,
#courseModal .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(167, 136, 115, 0.1);
}

#courseModal .btn-primary {
    background: linear-gradient(135deg, #A78873 0%, #5E463A 100%);
    color: var(--light-color);
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

#courseModal .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Responsive */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
        z-index: 1000;
        right: auto;
    }
    
    .admin-main {
        margin-right: 0;
        margin-left: 0;
        width: 100%;
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .course-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .btn-add {
        width: 100%;
    }
}