:root{--bg-main: #f8fafc;--bg-card: #ffffff;--bg-card-subtle: #f1f5f9;--text-main: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--brand-blue: #2563eb;--brand-blue-hover: #1d4ed8;--brand-blue-light: #eff6ff;--brand-green: #10b981;--brand-green-hover: #059669;--brand-green-light: #ecfdf5;--brand-purple: #8b5cf6;--brand-purple-light: #f5f3ff;--brand-orange: #f97316;--brand-orange-hover: #ea580c;--brand-orange-light: #fff7ed;--brand-red: #ef4444;--brand-red-light: #fef2f2;--accent-yellow: #f59e0b;--btn-shadow-blue: 0 4px 0 #1e40af;--btn-shadow-orange: 0 4px 0 #c2410c;--btn-shadow-green: 0 4px 0 #047857;--btn-shadow-purple: 0 4px 0 #6d28d9;--shadow-sm: 0 2px 4px rgba(15, 23, 42, .05);--shadow-md: 0 10px 25px -5px rgba(15, 23, 42, .08), 0 8px 10px -6px rgba(15, 23, 42, .04);--shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, .12);--font-heading: "Outfit", sans-serif;--font-body: "Plus Jakarta Sans", sans-serif;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-main: #0b0f19;--bg-card: #1e293b;--bg-card-subtle: #334155;--text-main: #f8fafc;--text-muted: #94a3b8;--border-color: #334155;--brand-blue-light: rgba(37, 99, 235, .15);--brand-green-light: rgba(16, 185, 129, .15);--brand-purple-light: rgba(139, 92, 246, .15);--brand-orange-light: rgba(249, 115, 22, .15);--shadow-md: 0 10px 25px -5px rgba(0, 0, 0, .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background-color:var(--bg-main);color:var(--text-main);line-height:1.5;font-size:16px;min-height:100vh;overflow-x:hidden;transition:background-color .3s ease,color .3s 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.65rem;border-radius:var(--radius-full);display:inline-block;margin-bottom:.5rem}.period-title{font-size:1.2rem;font-weight:800;margin-bottom:.4rem}.period-question{font-size:.82rem;color:var(--text-muted);font-style:italic;margin-bottom:.85rem;background-color:var(--bg-card-subtle);padding:.5rem .7rem;border-radius:var(--radius-sm);border-left:3px solid var(--brand-blue)}.topic-list-tags{display:flex;flex-wrap:wrap;gap:.35rem;margin-bottom:1.25rem}.tag-item{background-color:var(--brand-blue-light);color:var(--brand-blue);font-size:.75rem;font-weight:700;padding:.2rem .5rem;border-radius:var(--radius-sm)}.presentation-container{display:flex;flex-direction:column;height:calc(100vh - 100px);max-height:820px;min-height:580px;padding:.5rem 0 1rem}.slide-controls-bar{display:flex;align-items:center;justify-content:space-between;background-color:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--radius-md);padding:.5rem 1rem;margin-bottom:.75rem;flex-shrink:0}.slide-counter{font-size:.9rem;font-weight:800;color:var(--brand-blue)}.slide-progress-track{flex-grow:1;max-width:300px;height:8px;background-color:var(--bg-card-subtle);border-radius:var(--radius-full);overflow:hidden;margin:0 1rem}.slide-progress-fill{height:100%;background:linear-gradient(90deg,var(--brand-blue),var(--brand-green));border-radius:var(--radius-full);transition:width .3s ease}.slide-card-frame{background-color:var(--bg-card);border:3px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem 1.75rem;box-shadow:var(--shadow-lg);flex-grow:1;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;position:relative}.slide-header{display:flex;align-items:center;justify-content:space-between;border-bottom:2px dashed var(--border-color);padding-bottom:.5rem;margin-bottom:1rem;flex-shrink:0}.slide-topic-badge{background-color:var(--brand-purple-light);color:var(--brand-purple);font-size:.78rem;font-weight:800;padding:.3rem .8rem;border-radius:var(--radius-full);text-transform:uppercase}.slide-school-logo{height:32px;width:auto}.slide-content-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:1.5rem;align-items:center;flex-grow:1;overflow-y:auto;padding-right:.4rem}@media (max-width: 900px){.slide-content-grid{grid-template-columns:1fr}}.slide-interactive-card{position:relative;cursor:pointer;transition:var(--transition-normal);border-radius:var(--radius-md)}.slide-interactive-card:hover{transform:translateY(-2px) scale(1.008);box-shadow:var(--shadow-md)}.card-expand-trigger-badge{position:absolute;top:.4rem;right:.5rem;background-color:#2563eb26;color:var(--brand-blue);font-size:.7rem;font-weight:800;padding:.1rem .45rem;border-radius:var(--radius-full);pointer-events:none;transition:var(--transition-fast)}.slide-interactive-card:hover .card-expand-trigger-badge{background-color:var(--brand-blue);color:#fff}.slide-title{font-size:1.85rem;font-weight:900;margin-bottom:.6rem;color:var(--brand-blue);line-height:1.15;letter-spacing:-.02em}.slide-explanation{font-size:1.1rem;font-weight:600;line-height:1.5;margin-bottom:1rem;color:var(--text-main)}.slide-grammar-card{background-color:var(--brand-blue-light);border:2px solid var(--brand-blue);border-radius:var(--radius-md);padding:.85rem 1rem;margin-bottom:.75rem;box-shadow:var(--shadow-sm)}.grammar-card-header{font-size:.85rem;font-weight:800;color:var(--brand-blue);text-transform:uppercase;margin-bottom:.5rem;display:flex;align-items:center;justify-content:space-between;gap:.4rem;border-bottom:1px dashed rgba(37,99,235,.25);padding-bottom:.35rem}.grammar-formula-row{font-size:.95rem;font-weight:700;margin-bottom:.35rem;display:flex;align-items:baseline;flex-wrap:wrap;gap:.4rem;line-height:1.45}.grammar-label-badge{display:inline-flex;align-items:center;gap:.25rem;padding:.15rem .55rem;border-radius:var(--radius-sm);font-size:.8rem;font-weight:900;text-transform:uppercase;flex-shrink:0}.grammar-label-badge.affirmative{background-color:#dcfce7;color:#15803d;border:1px solid #86efac}.grammar-label-badge.negative{background-color:#fee2e2;color:#b91c1c;border:1px solid #fca5a5}.grammar-label-badge.question{background-color:#f3e8ff;color:#6b21a8;border:1px solid #d8b4fe}.grammar-label-badge.generic{background-color:#e0f2fe;color:#0369a1;border:1px solid #7dd3fc}.formula-pill{background-color:#2563eb24;color:var(--brand-blue);font-weight:800;padding:.1rem .45rem;border-radius:var(--radius-sm);font-family:var(--font-heading)}.formula-op{color:var(--brand-orange);font-weight:900;margin:0 .1rem}.slide-examples-box{background-color:var(--bg-card-subtle);border-left:4px solid var(--brand-orange);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:.85rem 1rem;margin-bottom:.75rem}.example-title{font-size:.85rem;font-weight:800;color:var(--brand-orange);text-transform:uppercase;margin-bottom:.4rem;display:flex;align-items:center;justify-content:space-between;gap:.3rem}.example-item{font-size:.98rem;font-weight:600;margin-bottom:.3rem}.slide-image-wrapper{border-radius:var(--radius-md);overflow:hidden;border:2px solid var(--border-color);box-shadow:var(--shadow-md);max-height:250px}.slide-image-wrapper img{width:100%;height:250px;object-fit:cover;display:block}.andi-slide-speech{display:flex;align-items:center;gap:1rem;background-color:var(--brand-orange-light);border:2px dashed var(--brand-orange);border-radius:var(--radius-md);padding:.75rem 1rem;margin-top:.75rem;cursor:pointer;transition:var(--transition-fast);flex-shrink:0}.andi-slide-speech:hover{transform:translateY(-2px) scale(1.01);box-shadow:var(--shadow-md);border-color:var(--brand-orange-hover)}.andi-thumb{width:54px;height:54px;border-radius:var(--radius-full);border:3px solid var(--brand-orange);object-fit:cover;flex-shrink:0}.andi-speech-content{flex-grow:1}.andi-speaker-name{font-size:.8rem;font-weight:800;color:var(--brand-orange);text-transform:uppercase;display:flex;align-items:center;justify-content:space-between}.andi-expand-badge{background-color:var(--brand-orange);color:#fff;font-size:.7rem;font-weight:800;padding:.15rem .55rem;border-radius:var(--radius-full)}.andi-tip-text{font-size:.95rem;font-weight:700;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:750px}.amplified-card-modal{background-color:var(--bg-card);border:5px solid var(--brand-blue);border-radius:var(--radius-lg);max-width:960px;width:95vw;padding:2.5rem;box-shadow:0 0 50px #2563eb59;position:relative;max-height:90vh;overflow-y:auto}.amplified-card-header{display:flex;align-items:center;gap:1rem;border-bottom:3px solid var(--border-color);padding-bottom:1rem;margin-bottom:1.5rem}.amplified-card-icon{font-size:2.5rem}.amplified-card-header h2{font-size:1.8rem;font-weight:900;color:var(--brand-blue)}.amplified-card-body{font-size:1.5rem;font-weight:700;line-height:1.75;margin-bottom:2rem}.amplified-card-body p{margin-bottom:1.25rem;font-size:1.5rem}.amplified-card-body .grammar-formula-row{font-size:1.5rem;margin-bottom:1.1rem;display:flex;align-items:center;flex-wrap:wrap;gap:.6rem}.amplified-card-body .grammar-label-badge{font-size:1.25rem;padding:.35rem .85rem;border-radius:var(--radius-md)}.amplified-card-body .formula-pill{font-size:1.45rem;padding:.35rem .85rem;border-radius:var(--radius-md);background-color:#2563eb2e}.amplified-card-body .formula-op{font-size:1.6rem;margin:0 .3rem}.amplified-card-body .example-item{font-size:1.5rem;margin-bottom:1rem;background-color:var(--brand-orange-light);padding:1rem 1.4rem;border-radius:var(--radius-md);border-left:5px solid var(--brand-orange)}[data-projector=true]{--bg-main: #090d16;--bg-card: #111827;--bg-card-subtle: #1f2937;--text-main: #ffffff;--text-muted: #d1d5db;--border-color: #374151;--brand-blue-light: rgba(59, 130, 246, .25);--brand-orange-light: rgba(249, 115, 22, .25);--brand-purple-light: rgba(168, 85, 247, .25);font-size:18px}[data-projector=true] .slide-card-frame{border:4px solid var(--brand-blue);background-color:#0d1322;box-shadow:0 0 35px #2563eb59}[data-projector=true] .slide-title{font-size:2.15rem;color:#60a5fa;text-shadow:0 2px 4px rgba(0,0,0,.5)}[data-projector=true] .slide-explanation{font-size:1.25rem;color:#f9fafb}[data-projector=true] .slide-grammar-card{background-color:#1e293b;border:3px solid #60a5fa}[data-projector=true] .grammar-card-header{color:#93c5fd;border-bottom-color:#93c5fd4d}[data-projector=true] .formula-pill{background-color:#1d4ed8;color:#fff;border:1px solid #93c5fd}[data-projector=true] .formula-op{color:#fb923c;font-weight:900}[data-projector=true] .andi-slide-speech{background-color:#1e293b;border:3px dashed #fb923c}[data-projector=true] .andi-tip-text{font-size:1.1rem;color:#fff}[data-projector=true] .btn-slide-nav{font-size:1.1rem;padding:.8rem 1.75rem}.slide-nav-bar{display:flex;align-items:center;justify-content:space-between;margin-top:.75rem;gap:1rem;flex-shrink:0}.btn-slide-nav{padding:.65rem 1.4rem;border-radius:var(--radius-md);font-size:.95rem;font-weight:800;display:flex;align-items:center;gap:.5rem;transition:var(--transition-fast)}.btn-prev{background-color:var(--bg-card-subtle);color:var(--text-main);border:2px solid var(--border-color)}.btn-next{background-color:var(--brand-blue);color:#fff;box-shadow:var(--btn-shadow-blue)}.btn-exercise-launch{background-color:var(--brand-green);color:#fff;box-shadow:var(--btn-shadow-green);font-size:1rem;padding:.75rem 1.6rem}.andi-modal-card{background-color:var(--bg-card);border:4px solid var(--brand-orange);border-radius:var(--radius-lg);max-width:720px;width:92%;padding:2rem;box-shadow:var(--shadow-lg);position:relative;text-align:center}.andi-modal-avatar{width:150px;height:150px;border-radius:var(--radius-full);border:5px solid var(--brand-orange);object-fit:cover;margin:0 auto 1rem;box-shadow:var(--shadow-md)}.andi-modal-title{font-size:1.4rem;font-weight:900;color:var(--brand-orange);margin-bottom:.5rem}.andi-modal-speech-bubble{background-color:var(--brand-orange-light);border:3px solid var(--brand-orange);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem;position:relative}.andi-modal-tip-text{font-size:1.4rem;font-weight:800;color:var(--text-main);line-height:1.5}.exercise-container{background-color:var(--bg-card);border:3px solid var(--brand-green);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-lg);margin:1rem 0 2.5rem}.exercise-header{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--border-color);padding-bottom:1rem;margin-bottom:1.5rem}.exercise-type-badge{background-color:var(--brand-green-light);color:var(--brand-green);font-size:.8rem;font-weight:800;padding:.35rem .8rem;border-radius:var(--radius-full);text-transform:uppercase}.exercise-question-title{font-size:1.4rem;font-weight:800;margin-bottom:1.25rem}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-bottom:1.5rem}.option-card{background-color:var(--bg-card-subtle);border:3px solid var(--border-color);border-radius:var(--radius-md);padding:1rem 1.25rem;font-size:1.05rem;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:.85rem;transition:var(--transition-fast);text-align:left}.option-card:hover{border-color:var(--brand-blue);background-color:var(--brand-blue-light)}.option-card.correct{border-color:var(--brand-green)!important;background-color:var(--brand-green-light)!important;color:var(--brand-green)!important}.option-card.incorrect{border-color:var(--brand-red)!important;background-color:var(--brand-red-light)!important;color:var(--brand-red)!important}.option-letter{width:34px;height:34px;border-radius:var(--radius-full);background-color:var(--bg-card);border:2px solid var(--border-color);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:.95rem;flex-shrink:0}.correct-answer-reveal-box{background-color:var(--brand-green-light);border:2px solid var(--brand-green);border-radius:var(--radius-md);padding:1rem 1.25rem;margin-top:1.25rem}.reveal-title{font-size:.9rem;font-weight:800;color:var(--brand-green);text-transform:uppercase;margin-bottom:.35rem}.reveal-text{font-size:1.1rem;font-weight:800}.exercise-action-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-top:1.5rem;padding-top:1.25rem;border-top:2px solid var(--border-color)}.btn-reveal-solution{background-color:var(--brand-purple);color:#fff;box-shadow:var(--btn-shadow-purple);padding:.7rem 1.25rem;border-radius:var(--radius-md);font-size:.9rem;font-weight:800}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background-color:#0f172abf;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:1rem}.modal-card{background-color:var(--bg-card);border-radius:var(--radius-lg);border:3px solid var(--brand-blue);max-width:620px;width:100%;max-height:90vh;overflow-y:auto;padding:1.75rem;position:relative}.modal-close-btn{position:absolute;top:.75rem;right:.75rem;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--text-muted)}.image-modal-card{position:relative;width:96vw;height:92vh;max-width:96vw;max-height:92vh;background:#fff;padding:1.5rem;border-radius:var(--radius-lg);border:5px solid var(--brand-blue);box-shadow:0 0 50px #00000080;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden}.image-modal-card img{max-width:100%;max-height:calc(92vh - 3.5rem);object-fit:contain;display:block;border-radius:var(--radius-md)}[data-theme=dark] .image-modal-card,[data-projector=true] .image-modal-card{background-color:#0f172a;border-color:#3b82f6;box-shadow:0 0 50px #3b82f666}.modal-grammar-block{border-radius:var(--radius-md);padding:1.25rem 1.5rem;margin-bottom:1.25rem;box-shadow:var(--shadow-sm);transition:var(--transition-fast)}.modal-grammar-block.affirmative{background-color:#ecfdf5;border:3px solid #10b981;color:#064e3b}.modal-grammar-block.negative{background-color:#fef2f2;border:3px solid #ef4444;color:#7f1d1d}.modal-grammar-block.question{background-color:#f5f3ff;border:3px solid #8b5cf6;color:#4c1d95}.modal-grammar-block.generic{background-color:#eff6ff;border:3px solid #2563eb;color:#1e40af}[data-theme=dark] .modal-grammar-block.affirmative,[data-projector=true] .modal-grammar-block.affirmative{background-color:#10b98138;border-color:#34d399;color:#a7f3d0}[data-theme=dark] .modal-grammar-block.negative,[data-projector=true] .modal-grammar-block.negative{background-color:#ef444438;border-color:#f87171;color:#fecaca}[data-theme=dark] .modal-grammar-block.question,[data-projector=true] .modal-grammar-block.question{background-color:#8b5cf638;border-color:#c084fc;color:#e9d5ff}[data-theme=dark] .modal-grammar-block.generic,[data-projector=true] .modal-grammar-block.generic{background-color:#2563eb38;border-color:#60a5fa;color:#bfdbfe}.modal-grammar-formula-text{font-size:1.55rem;font-weight:800;line-height:1.8}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .25s ease}.app-footer{margin-top:auto;background-color:var(--bg-card);border-top:2px solid var(--border-color);padding:1rem 0;text-align:center;font-size:.85rem;color:var(--text-muted)}.footer-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem}