@import "https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;800&family=Fredoka:wght@400;600&display=swap";:root{--primary:#ff6b6b;--secondary:#4ecdc4;--accent:#ffe66d;--background:#1a1a2e;--surface:#ffffff1a;--surface-hover:#ffffff26;--text:#f7fff7;--text-muted:#a8a8b3;--success:#2ecc71;--error:#e74c3c}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--background);color:var(--text);background-image:radial-gradient(circle at 15%,#ff6b6b26,#0000 25%),radial-gradient(circle at 85% 30%,#4ecdc426,#0000 25%);flex-direction:column;min-height:100vh;font-family:Outfit,sans-serif;display:flex}h1,h2,h3,h4,h5,h6{letter-spacing:.5px;font-family:Fredoka,sans-serif}.glass-panel{background:var(--surface);-webkit-backdrop-filter:blur(12px);border:1px solid #ffffff1a;border-radius:24px;box-shadow:0 8px 32px #0000004d}.btn{cursor:pointer;border:none;border-radius:100px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-family:Fredoka,sans-serif;font-size:1.1rem;font-weight:600;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:inline-flex}.btn:active{transform:scale(.95)}.btn-primary{background:linear-gradient(135deg, var(--primary), #ff8e8e);color:#fff;box-shadow:0 4px 15px #ff6b6b66}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff6b6b99}.btn-secondary{background:linear-gradient(135deg, var(--secondary), #6df0e7);color:#1a1a2e;box-shadow:0 4px 15px #4ecdc466}.btn-secondary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #4ecdc499}.btn-outline{border:2px solid var(--text-muted);color:var(--text);background:0 0}.btn-outline:hover{border-color:var(--text);background:#ffffff0d}.input-field{color:var(--text);background:#0003;border:2px solid #ffffff1a;border-radius:12px;width:100%;padding:12px 16px;font-family:Outfit,sans-serif;font-size:1rem;transition:all .2s}.input-field:focus{border-color:var(--secondary);outline:none;box-shadow:0 0 0 3px #4ecdc433}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0000001a}::-webkit-scrollbar-thumb{background:var(--surface);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--surface-hover)}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.animate-float{animation:4s ease-in-out infinite float}@keyframes pulse-glow{0%{box-shadow:0 0 #4ecdc466}70%{box-shadow:0 0 0 15px #4ecdc400}to{box-shadow:0 0 #4ecdc400}}.animate-pulse{animation:2s infinite pulse-glow}.form-group{margin-bottom:1.5rem}.form-label{color:var(--text);margin-bottom:.5rem;font-weight:600;display:block}.app-container{width:100%;max-width:800px;margin:0 auto;padding:2rem}.header{text-align:center;margin-bottom:3rem}.header h1{background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;filter:drop-shadow(0 2px 4px #0003);-webkit-background-clip:text;margin-bottom:.5rem;font-size:3.5rem}.header p{color:var(--text-muted);font-size:1.2rem}.card{margin-bottom:2rem;padding:2.5rem}@media (width<=600px){.app-container{padding:1rem}.header h1{font-size:2.5rem}.card{padding:1.5rem}}.upload-screen{text-align:center}.section-title{color:var(--accent);margin-bottom:2rem;font-size:2rem}.dropzone{cursor:pointer;background:#0000001a;border:3px dashed #fff3;border-radius:20px;margin-bottom:2rem;padding:3rem 2rem;transition:all .3s}.dropzone:hover,.dropzone.drag-over{border-color:var(--secondary);background:#4ecdc41a}.upload-icon{color:var(--secondary);margin-bottom:1rem}.dropzone h3{margin-bottom:.5rem;font-size:1.5rem}.dropzone p{color:var(--text-muted)}.file-list{text-align:left;flex-direction:column;gap:10px;margin-bottom:2rem;display:flex}.file-item{background:#ffffff0d;border:1px solid #ffffff1a;border-radius:12px;align-items:center;gap:12px;padding:12px 16px;display:flex}.file-name{white-space:nowrap;text-overflow:ellipsis;flex-grow:1;font-weight:600;overflow:hidden}.remove-btn{color:var(--error);cursor:pointer;background:#e74c3c33;border:none;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;transition:all .2s;display:flex}.remove-btn:hover{background:var(--error);color:#fff}.settings-form{text-align:left}.form-row{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:2rem;display:grid}.slider{width:100%;accent-color:var(--secondary);border-radius:4px;outline:none;height:6px;margin-top:10px}.generate-btn{width:100%;padding:16px;font-size:1.3rem}.error-banner{color:var(--error);background:#e74c3c1a;border:1px solid #e74c3c4d;border-radius:12px;margin-bottom:1.5rem;padding:12px}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{text-align:center;background:#1e1e28f2;width:90%;max-width:500px;padding:2.5rem;box-shadow:0 20px 40px #0006}.modal-actions{justify-content:center;gap:15px;display:flex}.loading-screen{text-align:center;padding:4rem 2rem}.spinner-container{background:#4ecdc41a;border-radius:50%;justify-content:center;align-items:center;width:120px;height:120px;margin-bottom:2rem;display:inline-flex}.spinner-icon{color:var(--secondary);animation:2s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-title{color:var(--accent);margin-bottom:1.5rem;font-size:2.2rem}.step-container{max-width:400px;margin:0 auto 2rem}.current-step{min-height:30px;margin-bottom:1rem;font-size:1.2rem}.progress-bar-bg{background:#ffffff1a;border-radius:10px;width:100%;height:8px;overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg, var(--primary), var(--secondary));height:100%;transition:width .5s}.timer{color:var(--text-muted);font-size:1.1rem}.interactive-quiz{padding:2.5rem}.quiz-header{border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;display:flex}.quiz-title{color:var(--secondary);font-size:1.4rem}.progress-indicator{background:#ffffff1a;border-radius:20px;padding:6px 16px;font-size:.9rem;font-weight:600}.question-container{border-left:4px solid var(--primary);background:#0003;border-radius:16px;margin-bottom:2.5rem;padding:2rem}.question-text{font-size:1.8rem;line-height:1.4}.options-container{flex-direction:column;gap:12px;margin-bottom:2rem;display:flex}.option-btn{color:var(--text);text-align:left;cursor:pointer;background:#ffffff0d;border:2px solid #ffffff1a;border-radius:12px;justify-content:space-between;align-items:center;padding:16px 20px;font-family:Outfit,sans-serif;font-size:1.1rem;transition:all .2s;display:flex}.option-btn:hover:not(:disabled){background:#ffffff1a;border-color:#ffffff4d;transform:translate(5px)}.option-btn.selected{border-color:var(--secondary);background:#4ecdc41a}.option-btn.correct{border-color:var(--success);background:#2ecc7133}.option-btn.wrong{border-color:var(--error);background:#e74c3c33}.icon-right{color:var(--success)}.icon-wrong{color:var(--error)}.feedback-box{border-radius:12px;margin-bottom:2rem;padding:1.5rem}.feedback-box.success{border:1px solid var(--success);background:#2ecc711a}.feedback-box.error{border:1px solid var(--error);background:#e74c3c1a}.feedback-box.info{border:1px solid var(--secondary);background:#4ecdc41a}.feedback-box h4{margin-bottom:.5rem;font-size:1.2rem}.explanation{color:var(--text);line-height:1.5}.action-footer{justify-content:flex-end;display:flex}.check-btn,.next-btn{padding:14px 32px;font-size:1.2rem}.check-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.answer-textarea{resize:vertical;min-height:120px;margin-bottom:1rem}.results-review-container{padding-bottom:4rem}.summary-card{text-align:center;margin-bottom:3rem;padding:3rem 2rem}.score-circle{flex-direction:column;justify-content:center;align-items:center;margin-bottom:1.5rem;display:flex}.score-text{background:linear-gradient(135deg, var(--accent), var(--primary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-top:10px;font-size:5rem;font-weight:800}.result-message{margin-bottom:2.5rem;font-size:1.8rem}.action-buttons{flex-wrap:wrap;justify-content:center;gap:15px;display:flex}.review-section{flex-direction:column;gap:1.5rem;display:flex}.review-card{border-left:5px solid #0000;padding:1.5rem}.review-card.border-success{border-left-color:var(--success)}.review-card.border-error{border-left-color:var(--error)}.review-header{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.q-num{color:var(--text-muted);font-family:Fredoka,sans-serif;font-size:1.2rem}.status-badge{border-radius:20px;padding:4px 12px;font-size:.9rem;font-weight:600}.status-badge.success{color:var(--success);background:#2ecc7133}.status-badge.error{color:var(--error);background:#e74c3c33}.q-text{margin-bottom:1.5rem;font-size:1.3rem}.answer-comparison{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-bottom:1.5rem;display:grid}.ans-box{background:#0003;border-radius:8px;padding:12px}.ans-box.yours{border-left:3px solid var(--text-muted)}.ans-box.correct{border-left:3px solid var(--success);background:#2ecc710d}.label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:5px;font-size:.85rem;display:block}.ans-box p{font-size:1.1rem;font-weight:600}.explanation-box{background:#ffffff0d;border-radius:8px;padding:15px;font-size:.95rem;line-height:1.5}.explanation-box strong{color:var(--accent);margin-bottom:5px;display:block}.text-success{color:var(--success)}.text-primary{color:var(--primary)}.pdf-content{color:#000;background:#fff;padding:40px;font-family:Arial,sans-serif}.pdf-header{border-bottom:2px solid #000;margin-bottom:30px;padding-bottom:20px}.pdf-header h2{text-align:center;margin-bottom:15px;font-size:24px}.pdf-meta{justify-content:space-between;font-weight:700;display:flex}.pdf-question-block{page-break-inside:avoid;margin-bottom:30px}.pdf-question-block h3{margin-bottom:10px;font-size:16px}.pdf-options{margin-bottom:10px;padding:0;list-style:none}.pdf-options li{margin-bottom:5px}.pdf-text-answer{margin-bottom:10px}.pdf-explanation{background:#f0f0f0;border-left:4px solid #4caf50;padding:10px;font-size:14px}