: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:1.6;font-size:16px;min-height:100vh;overflow-x:hidden;transition:background-color .3s ease,color .3s ease}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);line-height:1.2;color:var(--text-main)}button{font-family:var(--font-heading);font-weight:700;cursor:pointer;border:none;outline:none}#app{display:flex;flex-direction:column;min-height:100vh}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.5rem}.app-header{background-color:var(--bg-card);border-bottom:2px solid var(--border-color);position:sticky;top:0;z-index:100;padding:.8rem 0;box-shadow:var(--shadow-sm)}.nav-wrapper{display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand-group{display:flex;align-items:center;gap:1rem;cursor:pointer;text-decoration:none}.brand-logo{height:48px;width:auto;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.brand-text-group{display:flex;flex-direction:column}.brand-title{font-size:1.25rem;font-weight:800;color:var(--brand-blue);letter-spacing:-.02em}.brand-subtitle{font-size:.8rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.nav-actions{display:flex;align-items:center;gap:.75rem}.btn-icon{background-color:var(--bg-card-subtle);color:var(--text-main);border:2px solid var(--border-color);padding:.6rem 1rem;border-radius:var(--radius-md);display:flex;align-items:center;gap:.5rem;font-size:.9rem;font-weight:700;transition:var(--transition-fast)}.btn-icon:hover{border-color:var(--brand-blue);color:var(--brand-blue);transform:translateY(-2px)}.btn-primary{background-color:var(--brand-orange);color:#fff;padding:.65rem 1.4rem;border-radius:var(--radius-md);box-shadow:var(--btn-shadow-orange);font-size:.95rem;font-weight:800;display:inline-flex;align-items:center;gap:.5rem;transition:var(--transition-fast)}.btn-primary:hover{background-color:var(--brand-orange-hover);transform:translateY(-2px);box-shadow:0 6px #c2410c}.btn-primary:active{transform:translateY(2px);box-shadow:0 2px #c2410c}.hero-section{padding:3rem 0 2rem;text-align:center;position:relative}.hero-banner-wrapper{position:relative;border-radius:var(--radius-lg);overflow:hidden;margin-bottom:2rem;box-shadow:var(--shadow-lg);border:3px solid var(--border-color);max-height:280px}.hero-banner-img{width:100%;height:280px;object-fit:cover;display:block}.hero-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,#0f172ad9,#2563ebbf);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;color:#fff}.hero-badge{background-color:var(--brand-orange);color:#fff;font-size:.85rem;font-weight:800;padding:.35rem 1rem;border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem;box-shadow:0 4px 10px #f9731666}.hero-title{font-size:2.4rem;font-weight:900;margin-bottom:.5rem;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.3)}.hero-subtitle{font-size:1.15rem;font-weight:500;max-width:700px;color:#e2e8f0}.mascot-welcome-card{background-color:var(--bg-card);border:3px solid var(--brand-blue);border-radius:var(--radius-lg);padding:1.5rem 2rem;display:flex;align-items:center;gap:1.5rem;margin-bottom:2.5rem;box-shadow:var(--shadow-md);position:relative}.mascot-avatar{width:90px;height:90px;border-radius:var(--radius-full);object-fit:cover;border:4px solid var(--brand-blue);box-shadow:var(--shadow-md);flex-shrink:0}.speech-bubble{position:relative;background-color:var(--brand-blue-light);border:2px solid var(--brand-blue);border-radius:var(--radius-md);padding:1rem 1.25rem;color:var(--text-main);flex-grow:1}.speech-bubble:before{content:"";position:absolute;left:-14px;top:50%;transform:translateY(-50%);border-width:7px;border-style:solid;border-color:transparent var(--brand-blue) transparent transparent}.speech-bubble:after{content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);border-width:6px;border-style:solid;border-color:transparent var(--brand-blue-light) transparent transparent}.speech-bubble-title{font-size:1rem;font-weight:800;color:var(--brand-blue);margin-bottom:.25rem}.speech-bubble-text{font-size:.95rem;font-weight:600;color:var(--text-main)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.section-title{font-size:1.75rem;font-weight:800;display:flex;align-items:center;gap:.6rem}.section-title span{color:var(--brand-blue)}.grades-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem;margin-bottom:3rem}.grade-card{background-color:var(--bg-card);border:3px solid var(--border-color);border-radius:var(--radius-lg);padding:1.75rem;display:flex;flex-direction:column;justify-content:space-between;transition:var(--transition-normal);cursor:pointer;position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}.grade-card:hover:not(.locked){transform:translateY(-6px);border-color:var(--card-color, var(--brand-blue));box-shadow:var(--shadow-lg)}.grade-card.g6{--card-color: #2563eb}.grade-card.g7{--card-color: #8b5cf6}.grade-card.g8{--card-color: #10b981}.grade-card.locked{opacity:.65;cursor:not-allowed;background-color:var(--bg-card-subtle)}.grade-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.grade-number-badge{width:54px;height:54px;border-radius:var(--radius-md);background-color:var(--card-color, var(--brand-blue));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:900;box-shadow:0 4px 10px #00000026}.grade-status-badge{font-size:.75rem;font-weight:800;padding:.3rem .8rem;border-radius:var(--radius-full);text-transform:uppercase}.status-active{background-color:var(--brand-green-light);color:var(--brand-green);border:1px solid var(--brand-green)}.status-locked{background-color:var(--bg-card-subtle);color:var(--text-muted);border:1px solid var(--border-color)}.grade-name{font-size:1.5rem;font-weight:800;margin-bottom:.4rem}.grade-desc{font-size:.9rem;color:var(--text-muted);margin-bottom:1.5rem;flex-grow:1}.grade-topics-count{font-size:.85rem;font-weight:700;color:var(--brand-blue);background-color:var(--brand-blue-light);padding:.4rem .8rem;border-radius:var(--radius-sm);display:inline-block;margin-bottom:1.25rem}.btn-grade-action{width:100%;padding:.8rem;border-radius:var(--radius-md);background-color:var(--card-color, var(--brand-blue));color:#fff;font-size:1rem;font-weight:800;display:flex;align-items:center;justify-content:center;gap:.5rem;box-shadow:0 4px #0003;transition:var(--transition-fast)}.btn-grade-action:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-2px)}.breadcrumb-bar{display:flex;align-items:center;gap:.5rem;padding:1.25rem 0;font-size:.9rem;font-weight:700;color:var(--text-muted)}.breadcrumb-link{color:var(--brand-blue);cursor:pointer;text-decoration:none}.breadcrumb-link:hover{text-decoration:underline}.period-header-card{background-color:var(--bg-card);border:3px solid var(--brand-blue);border-radius:var(--radius-lg);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.5rem}.period-header-title{font-size:2.2rem;font-weight:900;margin-bottom:.25rem}.period-header-subtitle{font-size:1.05rem;color:var(--text-muted)}.periods-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-bottom:3rem}.period-card{background-color:var(--bg-card);border:3px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem;transition:var(--transition-normal);cursor:pointer;display:flex;flex-direction:column;justify-content:space-between}.period-card:hover{border-color:var(--brand-orange);transform:translateY(-5px);box-shadow:var(--shadow-md)}.period-badge{background-color:var(--brand-orange-light);color:var(--brand-orange);font-size:.8rem;font-weight:800;padding:.3rem .75rem;border-radius:var(--radius-full);display:inline-block;margin-bottom:.75rem;width:fit-content}.period-title{font-size:1.35rem;font-weight:800;margin-bottom:.5rem}.period-question{font-size:.9rem;color:var(--text-muted);font-style:italic;margin-bottom:1rem;background-color:var(--bg-card-subtle);padding:.6rem .8rem;border-radius:var(--radius-sm);border-left:3px solid var(--brand-blue)}.topic-list-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:1.5rem}.tag-item{background-color:var(--brand-blue-light);color:var(--brand-blue);font-size:.78rem;font-weight:700;padding:.25rem .6rem;border-radius:var(--radius-sm)}.presentation-container{display:flex;flex-direction:column;min-height:calc(100vh - 80px);padding:1rem 0 2rem}.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:.75rem 1.25rem;margin-bottom:1rem;box-shadow:var(--shadow-sm)}.slide-counter{font-size:1rem;font-weight:800;color:var(--brand-blue)}.slide-progress-track{flex-grow:1;max-width:350px;height:10px;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:2.5rem;box-shadow:var(--shadow-lg);flex-grow:1;display:flex;flex-direction:column;justify-content:space-between;position:relative;min-height:520px;transition:var(--transition-fast)}.slide-header{display:flex;align-items:center;justify-content:space-between;border-bottom:2px dashed var(--border-color);padding-bottom:1rem;margin-bottom:1.5rem}.slide-topic-badge{background-color:var(--brand-purple-light);color:var(--brand-purple);font-size:.85rem;font-weight:800;padding:.4rem 1rem;border-radius:var(--radius-full);text-transform:uppercase}.slide-school-logo{height:36px;width:auto}.slide-content-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:2rem;align-items:center;margin-bottom:1.5rem}@media (max-width: 900px){.slide-content-grid{grid-template-columns:1fr}}.slide-title{font-size:2.2rem;font-weight:900;margin-bottom:1rem;color:var(--brand-blue);line-height:1.15}.slide-explanation{font-size:1.25rem;font-weight:600;line-height:1.6;margin-bottom:1.5rem;color:var(--text-main)}.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:1.25rem;margin-bottom:1rem}.example-title{font-size:.95rem;font-weight:800;color:var(--brand-orange);text-transform:uppercase;margin-bottom:.5rem;display:flex;align-items:center;gap:.4rem}.example-item{font-size:1.1rem;font-weight:600;margin-bottom:.4rem}.example-item strong{color:var(--brand-blue)}.slide-image-wrapper{border-radius:var(--radius-md);overflow:hidden;border:2px solid var(--border-color);box-shadow:var(--shadow-md);max-height:320px}.slide-image-wrapper img{width:100%;height:320px;object-fit:cover;display:block}.andi-slide-speech{display:flex;align-items:flex-end;gap:1.25rem;background-color:var(--brand-blue-light);border:2px solid var(--brand-blue);border-radius:var(--radius-md);padding:1.25rem;margin-top:1rem}.andi-thumb{width:70px;height:70px;border-radius:var(--radius-full);border:3px solid var(--brand-blue);object-fit:cover;flex-shrink:0}.andi-speech-content{flex-grow:1}.andi-speaker-name{font-size:.85rem;font-weight:800;color:var(--brand-blue);text-transform:uppercase;margin-bottom:.2rem}.andi-tip-text{font-size:1.05rem;font-weight:700;color:var(--text-main)}.slide-nav-bar{display:flex;align-items:center;justify-content:space-between;margin-top:1.5rem;gap:1rem}.btn-slide-nav{padding:.8rem 1.6rem;border-radius:var(--radius-md);font-size:1.05rem;font-weight:800;display:flex;align-items:center;gap:.6rem;transition:var(--transition-fast)}.btn-prev{background-color:var(--bg-card-subtle);color:var(--text-main);border:2px solid var(--border-color)}.btn-prev:hover{border-color:var(--brand-blue);color:var(--brand-blue)}.btn-next{background-color:var(--brand-blue);color:#fff;box-shadow:var(--btn-shadow-blue)}.btn-next:hover{background-color:var(--brand-blue-hover);transform:translateY(-2px)}.btn-exercise-launch{background-color:var(--brand-green);color:#fff;box-shadow:var(--btn-shadow-green);font-size:1.1rem;padding:.9rem 2rem}.btn-exercise-launch:hover{background-color:var(--brand-green-hover);transform:translateY(-2px)}.exercise-container{background-color:var(--bg-card);border:3px solid var(--brand-green);border-radius:var(--radius-lg);padding:2.5rem;box-shadow:var(--shadow-lg);margin:1.5rem 0 3rem}.exercise-header{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--border-color);padding-bottom:1.25rem;margin-bottom:2rem}.exercise-title-group{display:flex;align-items:center;gap:.75rem}.exercise-type-badge{background-color:var(--brand-green-light);color:var(--brand-green);font-size:.85rem;font-weight:800;padding:.4rem 1rem;border-radius:var(--radius-full);text-transform:uppercase}.exercise-question-title{font-size:1.6rem;font-weight:800;margin-bottom:1.5rem}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-bottom:2rem}.option-card{background-color:var(--bg-card-subtle);border:3px solid var(--border-color);border-radius:var(--radius-md);padding:1.25rem 1.5rem;font-size:1.15rem;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:1rem;transition:var(--transition-fast);text-align:left}.option-card:hover{border-color:var(--brand-blue);background-color:var(--brand-blue-light);transform:translateY(-2px)}.option-card.selected{border-color:var(--brand-blue);background-color:var(--brand-blue-light);box-shadow:var(--btn-shadow-blue)}.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:38px;height:38px;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:1rem;flex-shrink:0}.matching-columns{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:2rem}.matching-item{background-color:var(--bg-card-subtle);border:3px solid var(--border-color);border-radius:var(--radius-md);padding:1rem 1.25rem;font-size:1.1rem;font-weight:700;cursor:pointer;margin-bottom:.75rem;transition:var(--transition-fast);display:flex;align-items:center;justify-content:space-between}.matching-item:hover{border-color:var(--brand-purple);background-color:var(--brand-purple-light)}.matching-item.active{border-color:var(--brand-purple);background-color:var(--brand-purple-light);box-shadow:var(--btn-shadow-purple)}.matching-item.matched{border-color:var(--brand-green);background-color:var(--brand-green-light);color:var(--brand-green);cursor:default}.writing-box{margin-bottom:2rem}.writing-input{width:100%;padding:1.25rem;border:3px solid var(--border-color);border-radius:var(--radius-md);font-size:1.3rem;font-family:var(--font-body);font-weight:700;color:var(--text-main);background-color:var(--bg-card-subtle);outline:none;transition:var(--transition-fast)}.writing-input:focus{border-color:var(--brand-blue);background-color:var(--bg-card);box-shadow:0 0 0 4px #2563eb33}.correct-answer-reveal-box{background-color:var(--brand-green-light);border:2px solid var(--brand-green);border-radius:var(--radius-md);padding:1.25rem 1.5rem;margin-top:1.5rem;animation:fadeIn .3s ease}.reveal-title{font-size:1rem;font-weight:800;color:var(--brand-green);text-transform:uppercase;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.reveal-text{font-size:1.2rem;font-weight:800;color:var(--text-main)}.exercise-action-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-top:2rem;padding-top:1.5rem;border-top:2px solid var(--border-color)}.btn-reveal-solution{background-color:var(--brand-purple);color:#fff;box-shadow:var(--btn-shadow-purple);padding:.8rem 1.5rem;border-radius:var(--radius-md);font-size:1rem;font-weight:800;display:flex;align-items:center;gap:.5rem}.btn-reveal-solution:hover{background-color:#7c3aed;transform:translateY(-2px)}.score-summary-card{text-align:center;padding:3rem 2rem;background-color:var(--bg-card);border:4px solid var(--brand-green);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.score-trophy-img{width:140px;height:140px;object-fit:cover;border-radius:var(--radius-full);border:4px solid var(--brand-green);margin:0 auto 1.5rem}.score-title{font-size:2.5rem;font-weight:900;color:var(--brand-green);margin-bottom:.5rem}.score-subtitle{font-size:1.2rem;color:var(--text-muted);margin-bottom:2rem}.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:1.5rem}.modal-card{background-color:var(--bg-card);border-radius:var(--radius-lg);border:3px solid var(--brand-blue);max-width:650px;width:100%;max-height:90vh;overflow-y:auto;padding:2rem;box-shadow:var(--shadow-lg);position:relative}.modal-close-btn{position:absolute;top:1rem;right:1rem;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .3s cubic-bezier(.4,0,.2,1)}.app-footer{margin-top:auto;background-color:var(--bg-card);border-top:2px solid var(--border-color);padding:1.5rem 0;text-align:center;font-size:.9rem;color:var(--text-muted)}.footer-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}