:root{--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #eff6ff;--secondary: #1e3a8a;--bg: #f8fafc;--card-bg: #ffffff;--text-main: #0f172a;--text-muted: #475569;--border: #e2e8f0;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-kid: "Outfit", system-ui, sans-serif;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);font-weight:300;background-color:var(--bg);color:var(--text-main);line-height:1.5;min-height:100vh;display:flex;flex-direction:column}.app-header{padding:1rem 2rem;background:#fffc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}.header-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo{font-family:var(--font-kid);font-size:1.5rem;font-weight:600;display:flex;align-items:center;gap:.5rem;color:var(--primary)}.logo-icon{font-size:1.75rem}.btn-ghost{background:transparent;border:none;color:var(--text-muted);cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;font-size:.95rem;font-weight:400;padding:.5rem 1rem;border-radius:var(--radius-sm);transition:all .2s ease}.btn-ghost:hover{background:var(--border);color:var(--text-main)}main#app{flex:1;display:flex;flex-direction:column;padding:2rem;max-width:1200px;width:100%;margin:0 auto}.view{display:none;animation:fadeIn .4s ease forwards}.view.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.hero{text-align:center;margin-bottom:3rem}.hero-title{font-family:var(--font-kid);font-size:3.5rem;font-weight:600;line-height:1.1;margin-bottom:1rem}.gradient-text{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-sub{color:var(--text-muted);font-size:1.125rem;max-width:600px;margin:0 auto}.form-card{background:var(--card-bg);border-radius:var(--radius-lg);padding:2.5rem;box-shadow:var(--shadow-xl);max-width:600px;margin:0 auto;border:1px solid rgba(255,255,255,.4)}.progress-bar-wrap{background:var(--border);height:6px;border-radius:3px;margin-bottom:1rem;overflow:hidden}.progress-bar{background:linear-gradient(90deg,var(--primary),var(--secondary));height:100%;width:33%;transition:width .4s cubic-bezier(.1,.7,.1,1);border-radius:3px}.step-label{font-size:.875rem;color:var(--text-muted);font-weight:500;text-transform:uppercase;letter-spacing:.05em;margin-bottom:2rem}.form-step{display:none}.form-step.active{display:block;animation:slideIn .3s ease forwards}@keyframes slideIn{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-weight:500;margin-bottom:.5rem;color:var(--text-main)}.form-group label .hint,.form-group label .optional,.notes-expandable summary .optional{font-weight:400;color:var(--text-muted);font-size:.875rem}.notes-expandable summary{font-weight:500;cursor:pointer;color:var(--text-main);-webkit-user-select:none;user-select:none;transition:color .2s}.notes-expandable summary:hover{color:var(--primary)}.notes-expandable textarea{margin-top:.75rem;resize:vertical}.form-group input[type=text],.form-group input[type=password],.form-group textarea{width:100%;padding:.75rem 1rem;border:2px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:1rem;transition:all .2s ease;background:#fdfdfd}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}.range-slider{width:100%;margin:1rem 0;accent-color:var(--primary)}.range-labels{display:flex;justify-content:space-between;color:var(--text-muted);font-size:.75rem;margin-top:.5rem;padding:0 4px}.range-labels span{font-size:.7rem;font-weight:500;text-align:center;flex:0 0 auto}.age-badge{background:var(--primary-light);color:var(--primary);padding:.2rem .6rem;border-radius:99px;font-weight:500}.section-header{font-family:var(--font-kid);font-size:1.25rem;font-weight:600;color:var(--text-main);margin-bottom:1rem}.interest-grid{display:flex;flex-wrap:wrap;gap:.75rem}.subject-btn{background:#fff;border:2px solid var(--border);padding:.8rem 1.2rem;border-radius:var(--radius-sm);font-size:1rem;font-family:var(--font-kid);font-weight:500;cursor:pointer;transition:all .2s ease;color:var(--text-muted)}.subject-btn:hover{border-color:var(--primary-light);background:var(--primary-light);color:var(--primary)}.subject-btn.selected{background:var(--primary);border-color:var(--primary);color:#fff;transform:scale(1.05)}.autocomplete-wrap{position:relative;margin-bottom:1rem}.autocomplete-input-box{position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:1rem;color:var(--text-muted);font-size:1rem}.autocomplete-input-box input[type=text]{width:100%;padding:.75rem 1rem .75rem 2.5rem;border:2px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:1rem;transition:all .2s ease;background:#fdfdfd}.autocomplete-input-box input[type=text]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}.autocomplete-dropdown{position:absolute;top:100%;left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);margin-top:.25rem;z-index:10;max-height:250px;overflow-y:auto;display:none}.autocomplete-dropdown.show{display:block}.autocomplete-item{padding:.75rem 1rem;cursor:pointer;font-size:.95rem;color:var(--text-main);transition:background .2s ease}.autocomplete-item:hover,.autocomplete-item.active{background:var(--primary-light);color:var(--primary)}.interest-pills{display:flex;flex-wrap:wrap;gap:.5rem}.interest-pill{display:inline-flex;align-items:center;gap:.5rem;background:var(--primary-light);color:var(--primary);padding:.4rem .8rem;border-radius:99px;font-size:.9rem;font-weight:500;border:1px solid rgba(37,99,235,.2)}.pill-remove{background:transparent;border:none;color:var(--primary);font-size:1.1rem;line-height:1;cursor:pointer;border-radius:50%;width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;transition:all .2s}.pill-remove:hover{background:#2563eb1a}.step-nav{display:flex;justify-content:space-between;margin-top:2rem}.btn-primary{background:var(--primary);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:var(--radius-sm);font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:.5rem}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.btn-generate{background:linear-gradient(135deg,var(--primary),var(--secondary))}.btn-generate:hover{background:linear-gradient(135deg,var(--primary-hover),#172554)}.calibration-list{display:flex;flex-direction:column;gap:1rem}.calibration-item{background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem}.calibration-item h4{margin-bottom:.5rem;font-size:.95rem}.calibration-options{display:flex;gap:.5rem}.calibration-option{flex:1;background:#fff;border:1px solid var(--border);padding:.5rem;border-radius:var(--radius-sm);text-align:center;font-size:.875rem;cursor:pointer;transition:all .2s}.calibration-option:hover{background:var(--primary-light);border-color:var(--primary)}.calibration-option.selected{background:var(--primary);color:#fff;border-color:var(--primary)}.loading-container{text-align:center;padding:4rem 2rem;max-width:500px;margin:0 auto}.loading-orb{position:relative;width:100px;height:100px;margin:0 auto 2rem;display:flex;align-items:center;justify-content:center;font-size:3rem}.orb-ring{position:absolute;top:0;right:0;bottom:0;left:0;border:4px solid var(--primary-light);border-radius:50%;border-top-color:var(--primary);animation:spin 1.5s linear infinite}.orb-ring-2{top:-10px;right:-10px;bottom:-10px;left:-10px;border:4px solid var(--primary-light);border-bottom-color:var(--secondary);animation:spin 2s linear infinite reverse}.orb-ring-3{top:10px;right:10px;bottom:10px;left:10px;border:2px solid transparent;border-left-color:var(--primary);animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-title{font-family:var(--font-kid);font-size:2rem;margin-bottom:.5rem}.loading-sub{color:var(--text-muted);margin-bottom:2rem;min-height:3em}.loading-bar-wrap{background:var(--border);height:10px;border-radius:5px;overflow:hidden}.loading-bar{background:linear-gradient(90deg,var(--primary),var(--secondary));height:100%;width:0%;transition:width .3s ease}.preview-toolbar{display:flex;flex-direction:column;align-items:center;gap:1rem;margin-bottom:2rem;padding-bottom:1.25rem;border-bottom:1px solid var(--border)}.preview-toolbar-top{display:flex;align-items:center;justify-content:center;gap:1.25rem}.preview-back-btn{display:inline-flex;align-items:center;gap:.35rem;background:var(--primary-light);color:var(--primary);border:1.5px solid rgba(37,99,235,.15);padding:.5rem 1rem .5rem .65rem;border-radius:99px;font-size:.9rem;font-weight:500;font-family:var(--font-sans);cursor:pointer;transition:all .2s ease;white-space:nowrap;flex-shrink:0}.preview-back-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translate(-2px)}.preview-back-btn svg{transition:transform .2s ease}.preview-back-btn:hover svg{transform:translate(-2px)}.preview-header-info{display:flex;flex-direction:column;gap:.15rem;min-width:0}.preview-title{font-family:var(--font-kid);font-weight:700;font-size:1.35rem;color:var(--text-main);line-height:1.2}.preview-subtitle{font-size:.85rem;color:var(--text-muted);font-weight:400}.preview-toolbar-actions{display:flex;justify-content:center;gap:.75rem}.btn-download{background:#10b981}.btn-download:hover{background:#059669}.worksheet-preview-wrap{display:flex;flex-direction:column;gap:2rem;align-items:center;padding-bottom:4rem}.worksheet-page{width:8.5in;height:11in;background:#fff;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;padding:.25in;color:#000;border:1px solid var(--border);font-family:Lora,Georgia,Times New Roman,serif;display:flex;flex-direction:column}.worksheet-page.hidden-for-print{display:block}.activity-block{display:flex;flex-direction:column;min-height:0}.activity-header{font-size:14pt;margin-bottom:5px;flex-shrink:0}.activity-body{display:flex;gap:15px;flex:1;min-height:0}.activity-text{flex:2;font-size:10pt;line-height:1.4;display:flex;flex-direction:column;overflow:hidden}.activity-image-container{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;overflow:hidden}.activity-image-container img{max-width:100%;max-height:100%;object-fit:contain}.activity-image-placeholder{width:100%;height:100%;border:2px dashed #ccc;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#999}.question-with-answer{margin-bottom:6px}.answer-box{margin-top:6px;border:2px solid #aaa;border-radius:12px;min-height:80px;flex-shrink:0;padding:8px 10px;background:#00000005}.answer-box--draw{min-height:120px}@media print{body *{visibility:hidden}#worksheetPreview,#worksheetPreview *{visibility:visible}#worksheetPreview{position:absolute;left:0;top:0;width:100%}.worksheet-page{box-shadow:none;border:none;page-break-after:always;width:100%;height:100%;padding:.25in}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a66;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s ease}.modal-backdrop.show{opacity:1;pointer-events:auto}.modal-card{background:var(--card-bg);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:400px;transform:translateY(20px);transition:transform .3s ease}.modal-backdrop.show .modal-card{transform:translateY(0)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.modal-header h3{font-family:var(--font-sans);font-weight:500}.modal-close{background:transparent;border:none;font-size:1.25rem;color:var(--text-muted);cursor:pointer}.modal-desc{font-size:.875rem;color:var(--text-muted);margin-bottom:1.5rem}.modal-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:1.5rem}.ai-disclaimer{text-align:center;font-size:.6rem;color:var(--text-muted);padding:1.5rem 1rem 1rem;opacity:.5;font-family:var(--font-sans);font-weight:300}.worksheet-disclaimer{text-align:center;font-size:6pt;color:#bbb;padding-top:4px;margin-top:auto;font-family:Inter,system-ui,sans-serif;font-weight:300}.onboarding-card{max-width:460px;text-align:center}.onboarding-card .form-group{text-align:left}.onboarding-card .modal-desc{margin-bottom:.5rem}.onboarding-header{display:flex;flex-direction:column;align-items:center;gap:.5rem;margin-bottom:1rem}.onboarding-icon{font-size:2.5rem}.onboarding-header h3{font-family:var(--font-kid);font-size:1.5rem;font-weight:700}.api-key-link{display:inline-block;margin-top:.5rem;font-size:.85rem;color:var(--primary);text-decoration:none;font-weight:500;transition:color .2s}.api-key-link:hover{color:var(--primary-hover);text-decoration:underline}.model-gate-note{margin-top:.5rem;font-size:.8rem;color:var(--text-muted);font-weight:400}select:disabled{opacity:.5;cursor:not-allowed;background:#f1f5f9}