:root{--color-bg: #fafaf8;--color-bg-subtle: #f1f0ee;--color-surface: #ffffff;--color-border: #e2e0dc;--color-text-primary: #1e293b;--color-text-secondary: #64748b;--color-accent: #2563eb;--color-accent-light: #dbeafe;--color-accent-hover: #1d4ed8;--color-gold: #d4a853;--color-gold-light: #f5ecd8;--color-success: #059669;--color-warning: #d97706;--color-danger: #dc2626;--font-display: "Playfair Display", Georgia, "Times New Roman", serif;--font-body: "Source Serif 4", Georgia, "Times New Roman", serif;--font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;--font-ui: "DM Sans", "IBM Plex Sans Arabic", system-ui, sans-serif;--font-body-ar: "Cairo", "Noto Kufi Arabic", "Amiri", serif;--font-ui-ar: "Cairo", "Noto Kufi Arabic", "IBM Plex Sans Arabic", system-ui, sans-serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.25rem;--text-xl: 1.5rem;--text-2xl: 2rem;--text-3xl: 2.75rem;--text-4xl: 3.5rem;--space-1: .5rem;--space-2: 1rem;--space-3: 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var(--space-3);border-bottom:1px solid var(--border);background:var(--card-2);font-family:var(--font-ui);font-size:var(--text-xs)}.slide-frame-header-start{display:flex;align-items:center;gap:.4rem;min-width:0}.slide-frame-section-tag{font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);flex-shrink:0}.slide-frame-section-sep{color:var(--muted)}.slide-frame-section-label{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.slide-frame-slide-num{font-weight:700;font-variant-numeric:tabular-nums;color:var(--text);flex-shrink:0}.slide-frame-slide-total{font-weight:500;color:var(--muted)}.slide-frame-content{flex:1;width:100%;max-width:860px;margin-inline:auto;padding:var(--space-4) var(--space-3) var(--space-3)}.slide-frame-footer{padding:0 var(--space-3) var(--space-2);margin-top:auto}.slide-frame-progress{width:100%;height:3px;border-radius:var(--radius-full);background:var(--card-2);overflow:hidden}.slide-frame-progress-fill{height:100%;background:var(--accent);border-radius:var(--radius-full);transition:width var(--transition-base)}.slide-frame--divider{min-height:var(--slide-min-h)}.slide-frame-divider-body{flex:1;display:grid;place-items:center;padding:var(--space-6) var(--space-4);background:#0f172a}.slide-frame-footer--divider{padding:0;background:#0f172a}.slide-frame-footer--divider .slide-frame-progress{height:4px;border-radius:0;background:#ffffff14}.slide-frame-footer--divider 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-.5);margin-bottom:var(--space-1);font-family:var(--font-ui);font-size:var(--text-sm);font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--color-gold)}.slide p{font-family:var(--font-body);color:var(--muted);line-height:1.85;font-size:clamp(var(--text-base),1.5vw,var(--text-lg));margin-block:var(--space-1)}.slide-body{font-family:var(--font-body);color:var(--text);line-height:1.85}.slide-bullet-list{list-style:none;margin:var(--space-2) 0 0;padding:0}.slide-bullet-list li{position:relative;padding-inline-start:1.35rem;margin-bottom:var(--space-2);font-family:var(--font-body);color:var(--text);line-height:1.75;font-size:clamp(var(--text-base),1.4vw,var(--text-lg));animation:bullet-fade-in .45s ease both}.slide-bullet-list li:before{content:"";position:absolute;inset-inline-start:0;top:.62em;width:7px;height:7px;border-radius:var(--radius-full);background:var(--color-gold);box-shadow:0 0 0 2px var(--color-gold-light)}.slide-bullet-list--compact li{margin-bottom:var(--space-1);font-size:var(--text-sm)}@keyframes bullet-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.slide ul:not(.slide-bullet-list):not(.section-divider-topics){margin:var(--space-2) 0 0;padding-inline-start:var(--space-3)}.slide li:not(.slide-bullet-list li):not(.section-divider-topics li){margin-bottom:var(--space-1);font-family:var(--font-body);color:var(--text);line-height:1.75}.media-badges{display:inline-flex;flex-wrap:wrap;gap:var(--space-1);vertical-align:middle}.media-badge{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius-full);padding:.2rem .6rem;font-family:var(--font-ui);font-size:var(--text-xs);font-weight:600;line-height:1.2}.media-badge-static{background:var(--color-accent-light);color:var(--accent)}.media-badge-animated{background:var(--color-gold-light);color:var(--text)}.slide-image{margin:var(--space-3) 0;padding:var(--space-1);border:1px solid var(--border);border-radius:var(--radius-md);background:var(--card-2)}.slide-image img{width:100%;max-height:320px;object-fit:contain;border-radius:var(--radius-sm);background:transparent}.slide-columns-three{margin-top:var(--space-3);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;align-items:stretch;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.slide-column-card{padding:var(--space-2) var(--space-3);min-height:var(--card-box-h);display:flex;flex-direction:column}.slide-column-card:not(:last-child){border-inline-end:1px solid var(--border)}.slide-column-heading{margin:0 0 var(--space-1);font-family:var(--font-display);font-size:var(--text-base);font-weight:600;color:var(--text);padding-bottom:var(--space-1);border-bottom:2px solid var(--color-gold-light)}.steps-grid{margin-top:var(--space-3);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-2)}.step-card{background:var(--card-2);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-2);min-height:var(--card-box-h);display:flex;flex-direction:column}.content-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-2);margin-top:var(--space-3);align-items:stretch}.content-card{background:var(--card-2);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-2);min-height:var(--card-box-h);display:flex;flex-direction:column;overflow:visible;transition:box-shadow var(--transition-fast)}.content-card:hover{box-shadow:var(--shadow-sm)}.content-card h3{margin-top:0}.slide-formula-block,.formula{margin:var(--space-2) 0;padding:var(--space-2) var(--space-3);background:var(--color-bg-subtle);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text);overflow-x:auto;text-align:center}html[data-theme=dark] .slide-formula-block,html[data-theme=dark] .formula{background:var(--card-3)}.slide .katex,.print-slide .katex,.print-page .katex,.print-page-canvas .katex{color:var(--text)}.slide .katex-display{margin:var(--space-1) 0;overflow-x:auto}.katex-error{color:var(--color-danger);font-family:var(--font-mono);font-size:var(--text-sm)}.table-wrap{margin-top:var(--space-3)}.table-wrap h3{margin:0 0 var(--space-1);font-family:var(--font-display);font-size:var(--text-lg)}.slide-table,.table-wrap table{width:100%;border-collapse:collapse;border-radius:var(--radius-md);border:1px solid var(--border);overflow:hidden;font-family:var(--font-body);font-size:var(--text-sm)}.slide-table th,.slide-table td,.table-wrap th,.table-wrap td{border:1px solid var(--border);padding:.65rem .85rem;text-align:start}.slide-table th,.table-wrap th{background:var(--text);font-family:var(--font-ui);font-weight:600;font-size:var(--text-xs);letter-spacing:.05em;text-transform:uppercase;color:#fff}html[data-theme=dark] .slide-table th,html[data-theme=dark] .table-wrap th{background:var(--card-4);color:var(--text)}.slide-table tbody 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var(--space-4);font-family:var(--font-ui);font-size:var(--text-xs);font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--color-gold)}.section-divider-titles{display:flex;flex-direction:column;gap:var(--space-1);margin-bottom:var(--space-4)}.section-divider-title-line{margin:0;font-family:var(--font-display);font-size:clamp(var(--text-2xl),4.5vw,var(--text-4xl));font-weight:700;letter-spacing:-.02em;line-height:1.1;color:#fff}.section-divider-meta{margin:0;font-family:var(--font-ui);font-size:var(--text-sm);color:#94a3b8;letter-spacing:.02em}.section-divider-meta-icon{color:var(--color-gold);margin-inline-end:.35rem}.slide-code-wrap{margin-top:var(--space-2);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;background:#1e293b}.slide-code-lang{padding:.35rem .75rem;font-family:var(--font-ui);font-size:var(--text-xs);font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#94a3b8;background:#0f172a;border-bottom:1px solid #334155}.slide-code-block{margin:0;padding:var(--space-2) var(--space-3);overflow-x:auto;font-family:var(--font-mono);font-size:.82rem;line-height:1.65;color:#e2e8f0;-moz-tab-size:2;tab-size:2}.slide-code-block code{font-family:inherit}.slide-code-block .tok-keyword{color:#93c5fd}.slide-code-block .tok-string{color:#86efac}.slide-code-block .tok-comment{color:#64748b;font-style:italic}.slide-code-block .tok-number{color:#fcd34d}.slide-code-block .tok-builtin{color:#c4b5fd}.controls{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding-top:var(--space-1)}.nav-btn{font-family:var(--font-ui);background:var(--accent);color:#fff;border:0;border-radius:var(--radius-md);padding:.7rem 1.4rem;font-weight:600;font-size:var(--text-sm);letter-spacing:.01em;cursor:pointer;transition:background var(--transition-fast),transform var(--transition-fast),box-shadow var(--transition-fast)}.topbar-btn{padding:.55rem 1rem;font-size:var(--text-sm);background:var(--card-2);color:var(--text);border:1px solid var(--border);box-shadow:none}.topbar-btn:hover{background:var(--card-3);border-color:var(--muted);transform:none}.nav-btn:hover{background:var(--accent-2);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.nav-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}.theme-btn{display:inline-flex;align-items:center;gap:var(--space-1)}.dots{display:none;align-items:center;justify-content:center;gap:var(--space-1);flex-wrap:wrap}.dot{width:8px;height:8px;border-radius:var(--radius-full);border:none;background:var(--dot-bg);cursor:pointer;padding:0;transition:background var(--transition-fast),transform 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.slide-icon{width:26px;height:26px}.presentation.is-canvas-fitted .illustration-slot{padding:1.25rem}.presentation.is-canvas-fitted .illustration-slot svg{max-height:320px}html[data-theme=dark] .illustration-slot{background:var(--card-3)}html[data-theme=dark] .slide-icon{color:var(--color-gold)}.takeaway-icon{flex-shrink:0;margin-inline-end:.35rem;color:var(--accent)}.takeaway-item{display:flex;align-items:flex-start;gap:.4rem}.slide-title-icon--print,.slide-bullet-icon-wrap--print{display:inline-block;width:1.1em;height:1.1em;border-radius:50%;background:var(--accent);opacity:.55;vertical-align:middle;margin-inline-end:.35rem}.illustration-slot--print .illustration-slot-graphic{min-height:4rem;border:1px dashed var(--border);border-radius:var(--radius-md);background:var(--card-2)}.illustration-slot--print .illustration-slot-graphic svg,.concept-card--print svg{display:block;width:100%;max-height:220px;margin-inline:auto}.concept-card--print{margin:var(--space-2) 0;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.trainer-panel--ai{max-width:420px}.ai-panel-body{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-2) var(--space-3) var(--space-3)}.ai-mode-tabs{display:flex;gap:.35rem;flex-wrap:wrap}.ai-mode-tab{flex:1;min-width:0;padding:.45rem .55rem;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--card-2);font-family:var(--font-ui);font-size:var(--text-xs);font-weight:600;color:var(--muted);cursor:pointer}.ai-mode-tab.is-active{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.ai-panel-hint{margin:0;font-family:var(--font-ui);font-size:var(--text-xs);line-height:1.5;color:var(--muted)}.ai-question-label{display:flex;flex-direction:column;gap:.35rem;font-family:var(--font-ui);font-size:var(--text-sm);color:var(--text)}.ai-question-input{width:100%;padding:.55rem .65rem;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--card);font-family:var(--font-ui);font-size:var(--text-sm);resize:vertical}.ai-panel-actions{display:flex;gap:var(--space-1);flex-wrap:wrap}.ai-panel-error{margin:0;padding:.55rem .65rem;border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-danger) 12%,var(--card));border:1px solid color-mix(in srgb,var(--color-danger) 35%,transparent);font-family:var(--font-ui);font-size:var(--text-xs);color:var(--color-danger)}.ai-panel-response{margin:0;max-height:240px;overflow:auto;padding:var(--space-2);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--card-2);font-family:var(--font-ui);font-size:var(--text-sm);line-height:1.55;white-space:pre-wrap;word-break:break-word}.settings-api-key-field{display:flex;flex-direction:column;gap:.4rem;margin-top:var(--space-2)}.settings-api-key-field input{padding:.55rem .65rem;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--card);font-family:var(--font-mono);font-size:var(--text-sm)}.settings-api-key-hint{margin:0;font-family:var(--font-ui);font-size:var(--text-xs);color:var(--muted);line-height:1.45}