/* ═══════════════════════════════════════════════════════════
   Lesson Generator Panel — inside AI Sidebar
   ═══════════════════════════════════════════════════════════ */

/* ── Container — fills entire sidebar below header ── */
#lgPanel {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}
#lgPanel.active { display: flex; }

/* ── Form Section ── */
.lg-form {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    flex: 1;
    scrollbar-width: thin;
}
.lg-form-group { display: flex; flex-direction: column; gap: 4px; }
.lg-form-group label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
}
.lg-input, .lg-select, .lg-textarea {
    background: var(--bg-item);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 9px 12px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}
.lg-input:focus, .lg-select:focus, .lg-textarea:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99,102,241,0.12);
}
.lg-textarea { resize: vertical; min-height: 44px; }

.lg-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.lg-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }

/* ── Template Picker ── */
.lg-templates-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.lg-tpl-thumb {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    aspect-ratio: 16/10;
}
.lg-tpl-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.lg-tpl-thumb:hover { border-color: rgba(99,102,241,0.5); transform: scale(1.04); }
.lg-tpl-thumb.selected {
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99,102,241,0.3);
}
.lg-tpl-thumb.selected::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 3px; right: 3px;
    background: #6366f1;
    color: #fff;
    width: 18px; height: 18px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.55rem;
}

/* ── Slide Count Chips ── */
.lg-count-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.lg-chip {
    flex: 1;
    min-width: 38px;
    padding: 7px 4px;
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    background: var(--bg-item);
    color: var(--text-muted);
    font-size: 0.78rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}
.lg-chip:hover { border-color: rgba(99,102,241,0.4); }
.lg-chip.active {
    border-color: #6366f1;
    background: rgba(99,102,241,0.18);
    color: #6366f1;
    font-weight: 700;
}

/* ── Generate Button ── */
.lg-generate-btn {
    background: linear-gradient(135deg, #7c3aed, #4f46e5, #2563eb);
    color: #fff;
    border: none;
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.25s;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 18px rgba(99,102,241,0.25);
    flex-shrink: 0;
}
.lg-generate-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99,102,241,0.35);
}
.lg-generate-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

/* ── Results Container ── */
.lg-results {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
    min-height: 0;
}

/* ── Back button ── */
.lg-back-btn {
    background: var(--bg-item);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.78rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    align-self: flex-start;
    flex-shrink: 0;
}
.lg-back-btn:hover { background: var(--bg-item-hover); color: var(--text-main); }

/* ── Slide Card ── */
.lg-slide-card {
    background: var(--bg-surface-solid);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    flex-shrink: 0;
    animation: lgSlideIn 0.35s ease-out both;
}
@keyframes lgSlideIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.lg-slide-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.08));
    border-bottom: 1px solid rgba(99,102,241,0.15);
    border-radius: 14px 14px 0 0;
}
.lg-slide-num {
    background: #6366f1;
    color: #fff;
    width: 28px; height: 28px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    flex-shrink: 0;
}
.lg-slide-type {
    font-size: 0.72rem;
    font-weight: 600;
    color: #6366f1;
    background: rgba(99,102,241,0.12);
    padding: 3px 10px;
    border-radius: 20px;
}

/* ── Slide Body — uses theme-aware colors ── */
.lg-slide-body {
    padding: 12px 14px;
    font-size: 0.84rem;
    line-height: 1.65;
    color: var(--text-main);
}
.lg-slide-body h4 {
    margin: 0 0 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
}
.lg-slide-body ul {
    margin: 4px 0 0;
    padding-left: 18px;
    list-style: disc;
}
.lg-slide-body li {
    margin-bottom: 4px;
    color: var(--text-main);
    opacity: 0.88;
}

/* ── Teacher Notes (collapsible) ── */
.lg-teacher-notes {
    margin: 0 14px 8px;
    padding: 10px 12px;
    background: rgba(251,191,36,0.08);
    border: 1px solid rgba(251,191,36,0.2);
    border-radius: 8px;
    font-size: 0.76rem;
    color: #b45309;
    display: none;
}
.lg-teacher-notes.show { display: block; }

/* ── Slide Image Preview ── */
.lg-slide-media {
    padding: 0 14px 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.lg-slide-media img {
    max-width: 100%;
    border-radius: 8px;
    max-height: 160px;
    object-fit: cover;
}

/* ── Action Buttons Row ── */
.lg-actions-row {
    display: flex;
    gap: 5px;
    padding: 10px 12px;
    border-top: 1px solid var(--border-glass);
    flex-wrap: wrap;
    background: rgba(99,102,241,0.04);
}

/* ── Canvas Action Row (Add to Canvas / Add as Image / Set BG) ── */
.lg-canvas-row {
    display: flex;
    gap: 6px;
    padding: 8px 12px 10px;
    background: var(--bg-item);
    border-top: 1px solid var(--border-glass);
    border-radius: 0 0 14px 14px;
}
.lg-canvas-btn {
    flex: 1;
    min-width: 0;
    padding: 9px 8px;
    border: none;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.15s;
    white-space: nowrap;
    color: #fff;
}
.lg-canvas-btn:hover { transform: translateY(-1px); filter: brightness(1.1); }
.lg-canvas-btn:active { transform: scale(0.97); }
.lg-canvas-btn i { font-size: 0.72rem; }

.lg-btn-add-text  { background: linear-gradient(135deg, #6366f1, #818cf8); }
.lg-btn-add-image { background: linear-gradient(135deg, #0ea5e9, #38bdf8); }
.lg-btn-set-bg    { background: linear-gradient(135deg, #10b981, #34d399); }
.lg-action-btn {
    flex: 1;
    min-width: 0;
    padding: 8px 6px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 0.68rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s;
    white-space: nowrap;
}
.lg-action-btn i { font-size: 0.75rem; }
.lg-action-btn:hover { transform: translateY(-1px); }

.lg-btn-search   { background: rgba(245,158,11,0.12); color: #d97706; border-color: rgba(245,158,11,0.2); }
.lg-btn-search:hover { background: rgba(245,158,11,0.22); }
.lg-btn-ai-img   { background: rgba(139,92,246,0.12); color: #7c3aed; border-color: rgba(139,92,246,0.2); }
.lg-btn-ai-img:hover { background: rgba(139,92,246,0.22); }
.lg-btn-geogebra { background: rgba(16,185,129,0.12); color: #059669; border-color: rgba(16,185,129,0.2); }
.lg-btn-geogebra:hover { background: rgba(16,185,129,0.22); }
.lg-btn-youtube  { background: rgba(239,68,68,0.12); color: #dc2626; border-color: rgba(239,68,68,0.2); }
.lg-btn-youtube:hover { background: rgba(239,68,68,0.22); }
.lg-btn-link     { background: rgba(99,102,241,0.1); color: #4f46e5; border-color: rgba(99,102,241,0.2); }
.lg-btn-link:hover { background: rgba(99,102,241,0.2); }
.lg-btn-notes    { background: rgba(251,191,36,0.1); color: #b45309; border-color: rgba(251,191,36,0.2); }
.lg-btn-notes:hover { background: rgba(251,191,36,0.2); }


/* ── Image Search Grid ── */
.lg-img-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    padding: 8px 14px 10px;
}
.lg-img-pick {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    aspect-ratio: 4/3;
}
.lg-img-pick img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.lg-img-pick-overlay {
    position: absolute;
    inset: 0;
    background: rgba(99,102,241,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    color: #fff;
    font-size: 1.2rem;
}
.lg-img-pick:hover { border-color: #6366f1; transform: scale(1.03); }
.lg-img-pick:hover .lg-img-pick-overlay { opacity: 1; }

/* ── Selected Media (image + action buttons) ── */
.lg-selected-media {
    padding: 8px 14px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.lg-selected-img {
    width: 100%;
    max-height: 180px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid var(--border-glass);
}
.lg-media-actions {
    display: flex;
    gap: 6px;
}
.lg-media-btn {
    flex: 1;
    padding: 8px 8px;
    border: none;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.15s;
    color: #fff;
}
.lg-media-btn:hover { transform: translateY(-1px); filter: brightness(1.1); }
.lg-mbtn-canvas { background: linear-gradient(135deg, #6366f1, #818cf8); }
.lg-mbtn-bg     { background: linear-gradient(135deg, #10b981, #34d399); }
.lg-mbtn-close  { background: rgba(239,68,68,0.15); color: #dc2626; flex: 0; padding: 8px 10px; }
.lg-mbtn-close:hover { background: rgba(239,68,68,0.3); }

/* ── Loading / Empty States ── */
.lg-media-loading, .lg-media-empty {
    padding: 10px 14px;
    font-size: 0.78rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.lg-media-loading { color: #6366f1; }
.lg-media-empty { color: var(--text-muted); }

/* ── RTL Support ── */
#lgPanel[dir="rtl"] .lg-slide-body ul { padding-left: 0; padding-right: 18px; }
#lgPanel[dir="rtl"] .lg-back-btn { align-self: flex-end; }
#lgPanel[dir="rtl"] .lg-slide-body { text-align: right; }

/* ── Loading Overlay ── */
.lg-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 20px;
    text-align: center;
}
.lg-loading i { font-size: 2rem; color: #6366f1; }
.lg-loading p { color: var(--text-muted); font-size: 0.85rem; margin: 0; }

/* ── Progress ── */
.lg-progress-bar {
    height: 3px;
    background: rgba(0,0,0,0.06);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 14px;
}
.lg-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899);
    border-radius: 2px;
    transition: width 0.4s ease;
    width: 0%;
}

[data-theme="dark"] .lg-slide-type { color: #a5b4fc; }
[data-theme="dark"] .lg-teacher-notes { color: #fbbf24; }
[data-theme="dark"] .lg-btn-search { color: #f59e0b; }
[data-theme="dark"] .lg-btn-ai-img { color: #a78bfa; }
[data-theme="dark"] .lg-btn-geogebra { color: #34d399; }
[data-theme="dark"] .lg-btn-youtube { color: #f87171; }
[data-theme="dark"] .lg-btn-notes { color: #fbbf24; }
[data-theme="dark"] .lg-chip.active { color: #a5b4fc; }

/* ── GeoGebra Graph Preview ── */
.lg-graph-preview {
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.lg-graph-desc {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #10b981;
    padding: 6px 10px;
    background: rgba(16,185,129,0.08);
    border-radius: 8px;
    border: 1px solid rgba(16,185,129,0.15);
}
.lg-graph-desc i { font-size: 0.9rem; }
.lg-graph-cmds {
    display: block;
    padding: 8px 12px;
    background: rgba(0,0,0,0.05);
    border-radius: 8px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 80px;
    overflow-y: auto;
    border: 1px solid var(--border-glass);
}
[data-theme="dark"] .lg-graph-cmds {
    background: rgba(255,255,255,0.04);
}
.lg-mbtn-ggb {
    background: linear-gradient(135deg, #10b981, #059669) !important;
}

/* ── Enhanced Action Button Active States ── */
.lg-action-btn:active { transform: scale(0.95); }
.lg-action-btn .fa-spin { animation-duration: 0.7s; }

/* ── Slide Card Entrance Animation ── */
@keyframes lg-card-in {
    from { opacity: 0; transform: translateY(18px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.lg-slide-card {
    animation: lg-card-in 0.35s ease both;
}

/* ── Enhanced slide body text ── */
.lg-slide-body h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0 0 6px;
    letter-spacing: -0.01em;
}
.lg-slide-body ul {
    color: var(--text-muted);
    font-size: 0.78rem;
    line-height: 1.6;
}
.lg-slide-body li {
    margin-bottom: 3px;
    position: relative;
}
.lg-slide-body li::marker {
    color: #6366f1;
}

/* ── Results Toolbar ── */
.lg-results-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 4px;
    flex-shrink: 0;
}
.lg-results-toolbar .lg-back-btn { flex-shrink: 0; }

/* ── Add All Slides Button ── */
.lg-add-all-btn {
    flex: 1;
    padding: 10px 14px;
    border: none;
    border-radius: 10px;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    transition: all 0.2s;
    letter-spacing: 0.3px;
}
.lg-add-all-btn:hover { transform: translateY(-1px); filter: brightness(1.12); box-shadow: 0 4px 14px rgba(99,102,241,0.35); }
.lg-add-all-btn:active { transform: scale(0.97); }
.lg-add-all-btn:disabled { opacity: 0.6; cursor: wait; }

/* ── Resume Button ── */
.lg-resume-btn {
    width: 100%;
    padding: 11px 14px;
    border: 2px dashed rgba(99,102,241,0.4);
    border-radius: 10px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(99,102,241,0.06);
    color: #6366f1;
    transition: all 0.2s;
    margin-top: 4px;
}
.lg-resume-btn:hover { background: rgba(99,102,241,0.14); border-color: #6366f1; }

/* ── Inline Video Results ── */
.lg-video-results {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 12px;
}
.lg-video-item {
    display: flex;
    gap: 8px;
    padding: 6px;
    border-radius: 8px;
    background: var(--bg-item);
    border: 1px solid var(--border-glass);
    transition: all 0.15s;
}
.lg-video-item:hover { border-color: rgba(239,68,68,0.3); }
.lg-video-thumb {
    width: 80px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}
.lg-video-thumb-placeholder {
    width: 80px;
    height: 50px;
    border-radius: 6px;
    background: rgba(239,68,68,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #dc2626;
    flex-shrink: 0;
}
.lg-video-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.lg-video-title {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.3;
}
.lg-video-actions {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}
.lg-vbtn {
    font-size: 0.62rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    border: none;
    transition: all 0.15s;
    text-decoration: none;
}
.lg-vbtn-watch { background: rgba(239,68,68,0.1); color: #dc2626; }
.lg-vbtn-watch:hover { background: rgba(239,68,68,0.2); }
.lg-vbtn-add { background: rgba(99,102,241,0.1); color: #4f46e5; }
.lg-vbtn-add:hover { background: rgba(99,102,241,0.2); }