/* ================================================
   SGC-LMS Styles
   Theme-compatible styles using SGC Theme System
   ================================================ */

/* Variables from SGC Theme System (theme-loader.js) */
:root {
    --lms-primary: var(--sgc-primary, #007AFF);
    --lms-secondary: var(--sgc-secondary, #5856D6);
    --lms-success: var(--sgc-success, #34C759);
    --lms-warning: var(--sgc-warning, #FF9500);
    --lms-danger: var(--sgc-danger, #FF3B30);
    --lms-bg: var(--sgc-bg, #ffffff);
    --lms-surface: var(--sgc-surface, #f5f5f7);
    --lms-text: var(--sgc-text, #1d1d1f);
    --lms-text-muted: var(--sgc-text-muted, #86868b);
    --lms-border: var(--sgc-border, #d2d2d7);
    --lms-radius: var(--sgc-radius, 12px);
    --lms-radius-sm: var(--sgc-radius-sm, 8px);
    --lms-shadow: var(--sgc-shadow, 0 4px 12px rgba(0, 0, 0, 0.08));
    --lms-shadow-lg: var(--sgc-shadow-lg, 0 8px 24px rgba(0, 0, 0, 0.12));
}

/* LMS Section Header */
.sgc-lms-section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.sgc-lms-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--lms-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 20px;
    margin-bottom: 0.75rem;
}

.sgc-lms-section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--lms-text);
    margin: 0 0 0.5rem;
}

.sgc-lms-section-desc {
    font-size: 1rem;
    color: var(--lms-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Course Grid */
.sgc-lms-course-grid-section {
    padding: 2rem 0;
}

.sgc-lms-course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Course Card */
.sgc-lms-course-card {
    display: flex;
    flex-direction: column;
    background: var(--lms-bg);
    border-radius: var(--lms-radius);
    overflow: hidden;
    box-shadow: var(--lms-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
}

.sgc-lms-course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--lms-shadow-lg);
}

.sgc-lms-card-thumbnail {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.sgc-lms-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sgc-lms-card-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    color: white;
}

.sgc-lms-badge-vod {
    background: var(--lms-primary);
}

.sgc-lms-badge-live {
    background: var(--lms-danger);
}

.sgc-lms-badge-digital {
    background: var(--lms-secondary);
}

.sgc-lms-card-featured {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: gold;
    color: #333;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.sgc-lms-card-body {
    flex: 1;
    padding: 1rem;
}

.sgc-lms-card-category {
    font-size: 0.75rem;
    color: var(--lms-primary);
    margin-bottom: 0.25rem;
}

.sgc-lms-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
    color: var(--lms-text);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sgc-lms-card-desc {
    font-size: 0.85rem;
    color: var(--lms-text-muted);
    margin: 0 0 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sgc-lms-card-instructor {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.sgc-lms-instructor-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.sgc-lms-card-instructor span {
    font-size: 0.8rem;
    color: var(--lms-text-muted);
}

.sgc-lms-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--lms-text-muted);
}

.sgc-lms-card-rating {
    color: #FFB800;
}

.sgc-lms-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--lms-border);
}

.sgc-lms-card-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--lms-primary);
}

/* Buttons */
.sgc-lms-btn-primary {
    background: var(--lms-primary);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--lms-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.sgc-lms-btn-primary:hover {
    background: color-mix(in srgb, var(--lms-primary), black 10%);
}

.sgc-lms-btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.sgc-lms-btn-secondary {
    background: var(--lms-surface);
    color: var(--lms-text);
    border: 1px solid var(--lms-border);
    padding: 0.6rem 1.25rem;
    border-radius: var(--lms-radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
}

.sgc-lms-btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.sgc-lms-btn-block {
    width: 100%;
    display: block;
}

/* Filters */
.sgc-lms-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.sgc-lms-search {
    flex: 1;
    min-width: 200px;
}

.sgc-lms-search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius-sm);
    font-size: 0.9rem;
    background: var(--lms-bg);
}

.sgc-lms-filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.sgc-lms-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius-sm);
    font-size: 0.85rem;
    background: var(--lms-bg);
    min-width: 120px;
}

/* Pagination */
.sgc-lms-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

.sgc-lms-page-btn {
    background: var(--lms-surface);
    border: 1px solid var(--lms-border);
    padding: 0.5rem 1rem;
    border-radius: var(--lms-radius-sm);
    cursor: pointer;
}

.sgc-lms-page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sgc-lms-page-info {
    font-size: 0.9rem;
    color: var(--lms-text-muted);
}

/* Loading & States */
.sgc-lms-loading,
.sgc-lms-error,
.sgc-lms-empty {
    text-align: center;
    padding: 3rem;
    color: var(--lms-text-muted);
}

.sgc-lms-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--lms-border);
    border-top-color: var(--lms-primary);
    border-radius: 50%;
    animation: sgc-spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

.sgc-lms-spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 0.5rem;
}

@keyframes sgc-spin {
    to {
        transform: rotate(360deg);
    }
}

/* Auth Form */
.sgc-lms-auth-container {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.sgc-lms-auth-card {
    background: var(--lms-bg);
    border-radius: var(--lms-radius);
    box-shadow: var(--lms-shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
}

.sgc-lms-auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.sgc-lms-auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
}

.sgc-lms-auth-subtitle {
    color: var(--lms-text-muted);
    margin: 0;
}

.sgc-lms-auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sgc-lms-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.sgc-lms-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sgc-lms-label {
    font-size: 0.85rem;
    font-weight: 500;
}

.sgc-lms-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius-sm);
    font-size: 1rem;
    background: var(--lms-bg);
}

.sgc-lms-input:focus {
    outline: none;
    border-color: var(--lms-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.sgc-lms-auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--lms-text-muted);
}

.sgc-lms-link {
    color: var(--lms-primary);
    text-decoration: none;
    font-weight: 500;
}

/* Alerts */
.sgc-lms-alert {
    padding: 0.75rem 1rem;
    border-radius: var(--lms-radius-sm);
    font-size: 0.9rem;
}

.sgc-lms-alert-error {
    background: #FEE2E2;
    color: #B91C1C;
}

.sgc-lms-alert-success {
    background: #D1FAE5;
    color: #065F46;
}

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

    .sgc-lms-filters {
        flex-direction: column;
    }

    .sgc-lms-filter-group {
        width: 100%;
    }

    .sgc-lms-select {
        flex: 1;
    }

    .sgc-lms-form-row {
        grid-template-columns: 1fr;
    }
}