*,*:before,*:after{box-sizing:border-box}:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-height:100vh;background-color:#f5f5f5}#root{min-height:100vh;width:100%}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh}.btn-logout{background:#fff3;color:#fff;border:2px solid rgba(255,255,255,.3);padding:10px 20px;border-radius:8px;font-weight:500;cursor:pointer;transition:background .2s}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a1a1a1}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.login-card{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;overflow:hidden;width:100%;max-width:420px}.login-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:40px 30px;text-align:center}.login-header .school-name{margin:0 0 8px;font-size:.9rem;text-transform:uppercase;letter-spacing:2px;opacity:.9}.login-header .powered-by{display:block;font-size:.75rem;letter-spacing:1px;opacity:.8;margin-top:4px}.login-header .tagline{font-size:1.1rem;font-weight:600;letter-spacing:1px;margin:0 0 8px}.login-header h1{margin:0 0 10px;font-size:1.8rem;font-weight:700}.login-header p{margin:0;opacity:.9;font-size:.95rem}.login-form{padding:40px 30px}.login-form h2{margin:0 0 25px;color:#333;font-size:1.4rem;text-align:center}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;color:#555;font-weight:500;font-size:.9rem}.form-group input{width:100%;padding:12px 14px;border:2px solid #e1e5eb;border-radius:8px;font-size:1rem;transition:border-color .2s,box-shadow .2s}.form-group input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.form-group input::placeholder{color:#aaa}.error-message{background:#fee;color:#c00;padding:12px;border-radius:8px;margin-bottom:20px;font-size:.9rem;text-align:center}.btn-primary{width:100%;padding:14px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.btn-primary:disabled{opacity:.7;cursor:not-allowed}.toggle-auth{margin-top:20px;text-align:center;color:#666;font-size:.9rem}.btn-link{background:none;border:none;color:#667eea;font-weight:600;cursor:pointer;padding:0;font-size:inherit}.btn-link:hover{text-decoration:underline}.password-requirements{margin-top:10px;padding:12px;background:#f8f9fa;border-radius:8px;font-size:.8rem;color:#666}.password-requirements p{margin:0 0 8px;font-weight:500;color:#555}.password-requirements ul{margin:0;padding-left:20px}.password-requirements li{margin-bottom:4px}.forgot-password{margin-top:16px;text-align:center;color:#888;font-size:.85rem}.loading-fullpage{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:50vh;gap:1rem}.loading-inline{display:inline-flex;align-items:center;gap:.5rem}.spinner{border-radius:50%;border-style:solid;border-color:#e0e0e0;border-top-color:#4f46e5;animation:spin .8s linear infinite}.spinner-small{width:16px;height:16px;border-width:2px}.spinner-medium{width:32px;height:32px;border-width:3px}.spinner-large{width:48px;height:48px;border-width:4px}.loading-message{color:#6b7280;font-size:.95rem}.loading-fullpage .loading-message{margin:0}.btn-loading{position:relative;pointer-events:none}.btn-loading .spinner{border-color:#ffffff4d;border-top-color:#fff}.app-flow-guide{margin-bottom:30px;background:#fff;border-radius:12px;box-shadow:0 2px 8px #00000014;overflow:hidden}.guide-toggle{width:100%;padding:16px 24px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;font-size:1rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:opacity .2s}.guide-toggle:hover{opacity:.95}.toggle-icon{font-size:.8rem;transition:transform .3s ease}.toggle-icon.expanded{transform:rotate(180deg)}.guide-content{padding:30px;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.guide-content h3{text-align:center;color:#333;margin:0 0 30px;font-size:1.4rem}.flow-steps{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}.flow-step{position:relative;background:linear-gradient(135deg,#f8f9ff,#f0f2ff);border-radius:12px;padding:24px 20px;width:160px;text-align:center;border:2px solid #e8eaff;transition:transform .2s,box-shadow .2s}.flow-step:hover{transform:translateY(-4px);box-shadow:0 8px 20px #667eea26;border-color:#667eea}.step-icon{font-size:2.5rem;margin-bottom:10px}.step-number{position:absolute;top:-10px;left:-10px;width:28px;height:28px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;box-shadow:0 2px 8px #667eea66}.step-content h4{margin:0 0 8px;color:#333;font-size:.95rem;font-weight:600}.step-content p{margin:0;color:#666;font-size:.8rem;line-height:1.4}.step-connector{display:none}.guide-footer{text-align:center;margin-top:30px;padding-top:20px;border-top:1px solid #eee}.guide-footer p{color:#888;margin:0;font-size:.9rem}@media(min-width:1200px){.flow-steps{flex-wrap:nowrap;gap:0}.flow-step{width:150px}.step-connector{display:flex;align-items:center;padding:0 8px}.connector-line{width:20px;height:2px;background:linear-gradient(90deg,#667eea,#764ba2)}.connector-arrow{color:#764ba2;font-size:1.2rem;font-weight:700;margin-left:-4px}}@media(max-width:1199px)and (min-width:768px){.flow-step{width:calc(33% - 20px);max-width:200px}}@media(max-width:767px){.guide-content{padding:20px}.flow-step{width:calc(50% - 10px)}.step-icon{font-size:2rem}.step-content h4{font-size:.85rem}.step-content p{font-size:.75rem}}@media(max-width:480px){.flow-step{width:100%;max-width:280px}}.dashboard{min-height:100vh;background:#f5f7fa}.dashboard-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px 40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.header-left h1{margin:0 0 5px;font-size:1.8rem}.header-left p{margin:0;opacity:.9}.header-right{display:flex;gap:12px}.btn-create{background:#fff;color:#667eea;border:none;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.btn-create:hover{transform:translateY(-2px);box-shadow:0 5px 20px #0003}.btn-logout{background:#fff3;color:#fff;border:2px solid rgba(255,255,255,.3);padding:12px 24px;border-radius:8px;font-weight:500;cursor:pointer;transition:background .2s}.btn-logout:hover{background:#ffffff4d}.dashboard-content{padding:30px 40px;max-width:1400px;margin:0 auto}.filters{margin-bottom:25px}.filters select{padding:10px 16px;border:2px solid #e1e5eb;border-radius:8px;font-size:1rem;background:#fff;cursor:pointer;min-width:200px}.filters select:focus{outline:none;border-color:#667eea}.empty-state{text-align:center;padding:60px 20px;background:#fff;border-radius:16px;box-shadow:0 2px 10px #0000000d}.empty-state h2{color:#333;margin-bottom:10px}.empty-state p{color:#666;margin-bottom:25px}.decks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.deck-card{background:#fff;border-radius:12px;box-shadow:0 2px 10px #0000000d;overflow:hidden;transition:transform .2s,box-shadow .2s}.deck-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px #0000001a}.deck-info{padding:20px}.deck-info h3{margin:0 0 8px;color:#333;font-size:1.2rem}.deck-subject{color:#667eea;font-weight:500;margin:0 0 12px}.deck-meta{display:flex;flex-wrap:wrap;gap:10px}.deck-meta span{background:#f0f2f5;padding:4px 10px;border-radius:20px;font-size:.8rem;color:#666}.deck-actions{display:flex;border-top:1px solid #f0f2f5}.deck-actions button{flex:1;padding:12px;border:none;background:none;cursor:pointer;font-weight:500;font-size:.85rem;transition:background .2s}.deck-actions button:not(:last-child){border-right:1px solid #f0f2f5}.btn-share{color:#10b981}.btn-share:hover{background:#ecfdf5}.btn-preview{color:#667eea}.btn-preview:hover{background:#eef2ff}.btn-edit{color:#f59e0b}.btn-edit:hover{background:#fffbeb}.btn-delete{color:#ef4444}.btn-delete:hover{background:#fef2f2}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.2rem;color:#666}.error-banner{background:#fef2f2;border:1px solid #fecaca;color:#dc2626;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;font-size:.95rem}.error-banner button:hover{color:#991b1b}.btn-loading{opacity:.7;cursor:not-allowed!important}.btn-delete.btn-loading{display:flex;align-items:center;justify-content:center}.btn-delete.btn-loading .spinner{border-color:#fecaca;border-top-color:#ef4444}@media(max-width:768px){.dashboard-header,.dashboard-content{padding:20px}.header-right{width:100%;justify-content:stretch}.header-right button{flex:1}}.prompt-builder{min-height:100vh;background:#f5f7fa}.builder-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 40px;display:flex;justify-content:space-between;align-items:center}.builder-header h1{margin:0;font-size:1.5rem}.btn-back{background:#fff3;color:#fff;border:none;padding:10px 20px;border-radius:8px;cursor:pointer;font-weight:500}.builder-main{max-width:900px;margin:0 auto;padding:40px 20px}.wizard-container{background:#fff;border-radius:16px;box-shadow:0 4px 20px #00000014;overflow:hidden}.wizard-progress{background:#f8f9fb;padding:20px 30px;border-bottom:1px solid #e5e7eb}.progress-bar{height:8px;background:#e5e7eb;border-radius:4px;overflow:hidden;margin-bottom:10px}.progress-text{color:#666;font-size:.9rem}.wizard-content{padding:40px 30px}.step-header h2{margin:0 0 15px;color:#333;font-size:1.6rem}.step-explanation{background:#f0f7ff;border-left:4px solid #667eea;padding:15px 20px;margin-bottom:25px;border-radius:0 8px 8px 0}.step-explanation p{margin:0 0 10px;color:#444;line-height:1.6}.step-example{color:#666;font-size:.9rem}.step-input input,.step-input select,.step-input textarea{width:100%;padding:14px 16px;border:2px solid #e5e7eb;border-radius:8px;font-size:1rem;transition:border-color .2s}.step-input input:focus,.step-input select:focus,.step-input textarea:focus{outline:none;border-color:#667eea}.step-input textarea{resize:vertical;min-height:100px}.prompt-preview{margin-top:30px;padding:20px;background:#f8f9fb;border-radius:8px}.prompt-preview h4{margin:0 0 12px;color:#666;font-size:.9rem}.prompt-preview pre{margin:0;font-size:.85rem;color:#444;white-space:pre-wrap;max-height:200px;overflow-y:auto}.wizard-actions{display:flex;justify-content:space-between;padding:20px 30px;background:#f8f9fb;border-top:1px solid #e5e7eb}.btn-secondary{background:#fff;color:#667eea;border:2px solid #667eea;padding:12px 30px;border-radius:8px;font-weight:600;cursor:pointer;transition:background .2s}.btn-secondary:hover:not(:disabled){background:#f0f4ff}.btn-secondary:disabled{opacity:.5;cursor:not-allowed}.prompt-phase,.paste-phase,.review-phase{background:#fff;border-radius:16px;padding:40px;box-shadow:0 4px 20px #00000014}.prompt-phase h2,.paste-phase h2,.review-phase h2{margin:0 0 10px;color:#333}.prompt-phase p,.paste-phase p,.review-phase p{color:#666;margin-bottom:25px}.prompt-display{background:#1e1e1e;border-radius:8px;padding:20px;margin-bottom:30px;position:relative}.prompt-display pre{color:#d4d4d4;font-size:.9rem;white-space:pre-wrap;margin:0;max-height:400px;overflow-y:auto}.btn-copy{position:absolute;top:15px;right:15px;background:#667eea;color:#fff;border:none;padding:8px 16px;border-radius:6px;cursor:pointer;font-size:.85rem}.btn-copy:hover{background:#5a6fd6}.next-step{display:flex;gap:15px;justify-content:center}.ai-response-input{width:100%;padding:16px;border:2px solid #e5e7eb;border-radius:8px;font-size:.95rem;font-family:monospace;resize:vertical;margin-bottom:20px}.ai-response-input:focus{outline:none;border-color:#667eea}.paste-actions{display:flex;gap:15px;justify-content:flex-end}.error-message{background:#fee;color:#c00;padding:12px 16px;border-radius:8px;margin-bottom:20px}.warning-message{background:#fffbeb;color:#b45309;border:1px solid #fbbf24;padding:12px 16px;border-radius:8px;margin-bottom:20px;line-height:1.5}.warning-message strong{color:#92400e}.deck-title-input{margin-bottom:25px}.deck-title-input label{display:block;margin-bottom:8px;font-weight:500;color:#555}.deck-title-input input{width:100%;padding:12px 16px;border:2px solid #e5e7eb;border-radius:8px;font-size:1rem}.deck-title-input input:focus{outline:none;border-color:#667eea}.cards-preview{max-height:400px;overflow-y:auto;margin-bottom:25px}.card-preview{display:flex;gap:15px;padding:15px;background:#f8f9fb;border-radius:8px;margin-bottom:10px}.card-number{width:30px;height:30px;background:#667eea;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.85rem;flex-shrink:0}.card-content{flex:1}.card-question{margin-bottom:8px;color:#333}.card-answer{color:#666;font-size:.95rem}.review-actions{display:flex;gap:15px;justify-content:flex-end;position:sticky;bottom:0;background:#fff;padding:20px;margin:20px -30px -30px;border-top:1px solid #e5e7eb;border-radius:0 0 16px 16px}.prompt-type-selector{margin-bottom:25px}.prompt-type-selector>p{margin-bottom:15px;font-weight:500;color:#555}.prompt-type-buttons{display:grid;grid-template-columns:1fr 1fr;gap:15px}.prompt-type-btn{display:flex;flex-direction:column;align-items:center;padding:20px;border:2px solid #e5e7eb;border-radius:12px;background:#fff;cursor:pointer;transition:all .2s}.prompt-type-btn:hover{border-color:#667eea;background:#f8f9ff}.prompt-type-btn.active{border-color:#667eea;background:linear-gradient(135deg,#667eea1a,#764ba21a)}.prompt-type-icon{font-size:2rem;margin-bottom:10px}.prompt-type-label{font-weight:600;color:#333;margin-bottom:5px}.prompt-type-desc{font-size:.85rem;color:#666}.notebooklm-tip{background:#f0f7ff;border-left:4px solid #667eea;padding:15px 20px;margin-bottom:25px;border-radius:0 8px 8px 0;color:#444;font-size:.95rem}.prompt-instruction{margin-bottom:15px!important}@media(max-width:768px){.builder-header{padding:15px 20px;flex-wrap:wrap;gap:10px}.builder-main{padding:20px 15px}.wizard-content{padding:25px 20px}.wizard-actions{padding:15px 20px}.prompt-phase,.paste-phase,.review-phase{padding:25px 20px}.prompt-type-buttons{grid-template-columns:1fr}}.deck-manager{min-height:100vh;background:#f5f7fa}.manager-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 40px;display:flex;justify-content:space-between;align-items:center}.manager-header h1{margin:0;font-size:1.5rem}.manager-main{max-width:900px;margin:0 auto;padding:40px 20px}.deck-info-section{background:#fff;border-radius:12px;padding:25px;margin-bottom:25px;box-shadow:0 2px 10px #0000000d}.info-field{margin-bottom:15px}.info-field:last-child{margin-bottom:0}.info-field label{display:block;margin-bottom:6px;font-weight:500;color:#555;font-size:.9rem}.info-field input{width:100%;padding:10px 14px;border:2px solid #e5e7eb;border-radius:8px;font-size:1rem}.info-field input:focus{outline:none;border-color:#667eea}.info-row{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.cards-section{background:#fff;border-radius:12px;padding:25px;margin-bottom:25px;box-shadow:0 2px 10px #0000000d}.cards-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.cards-header h2{margin:0;color:#333;font-size:1.3rem}.btn-add{background:#10b981;color:#fff;border:none;padding:10px 20px;border-radius:8px;font-weight:500;cursor:pointer;transition:background .2s}.btn-add:hover{background:#059669}.cards-list{display:flex;flex-direction:column;gap:15px}.card-editor{display:flex;gap:15px;background:#f8f9fb;border-radius:10px;padding:15px;position:relative}.card-controls{display:flex;flex-direction:column;align-items:center;gap:8px}.card-number{width:32px;height:32px;background:#667eea;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.85rem}.card-move-buttons{display:flex;flex-direction:column;gap:4px}.btn-move{width:28px;height:28px;border:1px solid #ddd;background:#fff;border-radius:4px;cursor:pointer;font-size:.8rem;display:flex;align-items:center;justify-content:center}.btn-move:hover:not(:disabled){background:#f0f0f0}.btn-move:disabled{opacity:.3;cursor:not-allowed}.card-fields{flex:1;display:flex;flex-direction:column;gap:12px}.field-group label{display:block;margin-bottom:4px;font-weight:500;color:#666;font-size:.85rem}.field-group textarea{width:100%;padding:10px 12px;border:2px solid #e5e7eb;border-radius:6px;font-size:.95rem;resize:vertical}.field-group textarea:focus{outline:none;border-color:#667eea}.btn-delete-card{position:absolute;top:10px;right:10px;width:28px;height:28px;border:none;background:#fee;color:#ef4444;border-radius:50%;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;justify-content:center;transition:background .2s}.btn-delete-card:hover{background:#fdd}.manager-actions{display:flex;justify-content:flex-end;gap:15px}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 30px;border-radius:8px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:#fff;color:#667eea;border:2px solid #667eea;padding:12px 30px;border-radius:8px;font-weight:600;cursor:pointer}.btn-secondary:hover{background:#f0f4ff}.loading,.error{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.2rem;color:#666}.error-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:1rem}.error-page button{padding:10px 20px;background:#667eea;color:#fff;border:none;border-radius:8px;cursor:pointer}.error-banner{background:#fef2f2;border-bottom:1px solid #fecaca;color:#dc2626;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;font-size:.95rem}.error-banner button{background:none;border:none;color:#dc2626;font-size:1.4rem;cursor:pointer;padding:0 0 0 15px;line-height:1}.info-field label{display:flex;align-items:center;gap:8px}.info-field label .loading-inline{margin-left:auto}@media(max-width:768px){.manager-header{padding:15px 20px;flex-wrap:wrap;gap:10px}.manager-main{padding:20px 15px}.info-row{grid-template-columns:1fr}.card-editor{flex-direction:column}.card-controls{flex-direction:row}}.branding{text-align:center;margin-bottom:15px}.branding .school-name{margin:0;font-size:.85rem;text-transform:uppercase;letter-spacing:2px;color:#333}.branding .powered-by{display:block;font-size:.7rem;letter-spacing:1px;opacity:.7;margin-top:3px}.branding .tagline{font-size:.9rem;font-weight:600;letter-spacing:1px;margin:6px 0 0;color:#667eea}.branding-light .school-name{color:#fff;opacity:.95}.branding-light .powered-by{opacity:.8}.branding-light .tagline{color:#fff;opacity:.9}.deck-landing{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}.landing-nav{display:flex;justify-content:flex-start;padding:20px}.landing-nav .btn-back{background:#fff3;color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:.95rem;cursor:pointer;transition:background .2s}.landing-nav .btn-back:hover{background:#ffffff4d}.landing-loading,.landing-error{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;text-align:center}.spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{to{transform:rotate(360deg)}}.landing-error h2{margin:0 0 10px;font-size:2rem}.landing-error button{margin-top:20px;padding:12px 30px;background:#fff;color:#667eea;border:none;border-radius:8px;font-weight:600;cursor:pointer}.landing-header{text-align:center;padding:20px 20px 40px;color:#fff}.landing-header .branding{margin-bottom:20px}.landing-header .school-name{margin:0;font-size:.9rem;text-transform:uppercase;letter-spacing:2px;opacity:.9}.landing-header .powered-by{display:block;font-size:.75rem;letter-spacing:1px;opacity:.8;margin-top:4px}.landing-header .tagline{font-size:1rem;font-weight:600;letter-spacing:1px;margin:8px 0 0;opacity:.9}.deck-badge{display:inline-block;background:#fff3;padding:6px 16px;border-radius:20px;font-size:.9rem;margin-bottom:15px}.landing-header h1{margin:0 0 15px;font-size:2.5rem;font-weight:700}.deck-details{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-bottom:15px}.deck-details span{background:#ffffff26;padding:5px 14px;border-radius:20px;font-size:.85rem}.deck-author{opacity:.8;margin:0}.landing-main{background:#fff;border-radius:30px 30px 0 0;padding:40px 20px 60px;min-height:calc(100vh - 280px)}.landing-main h2{text-align:center;color:#333;margin:0 0 30px;font-size:1.5rem}.modes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:1000px;margin:0 auto}.mode-card{background:#fff;border:2px solid #e5e7eb;border-radius:16px;padding:30px 25px;cursor:pointer;transition:all .3s ease;text-align:center}.mode-card:hover{border-color:var(--mode-color);transform:translateY(-5px);box-shadow:0 10px 40px #0000001a}.mode-icon{font-size:3rem;display:block;margin-bottom:15px}.mode-card h3{color:var(--mode-color);margin:0 0 10px;font-size:1.3rem}.mode-card p{color:#666;margin:0;font-size:.95rem;line-height:1.5}.landing-footer{text-align:center;padding:20px;color:#ffffffb3;font-size:.85rem}.landing-footer .copyright{margin-top:8px;font-size:.75rem;opacity:.8}.landing-footer .copyright a{color:#ffffffe6;text-decoration:none}.landing-footer .copyright a:hover{text-decoration:underline}@media(max-width:768px){.landing-header{padding:40px 20px 30px}.landing-header h1{font-size:1.8rem}.landing-main{padding:30px 15px 40px;border-radius:20px 20px 0 0}.modes-grid{grid-template-columns:1fr}}.flashcards-container{min-height:100vh;background:#f5f7fa;display:flex;flex-direction:column}.flashcards-loading,.flashcards-empty{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#666}.flashcards-empty button{margin-top:20px;padding:12px 24px;background:#667eea;color:#fff;border:none;border-radius:8px;cursor:pointer}.flashcards-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 30px;display:flex;justify-content:space-between;align-items:center}.flashcards-header h1{margin:0;font-size:1.3rem}.progress-info{font-size:1.1rem;font-weight:500}.known-count{font-size:.85rem;opacity:.8;margin-left:8px}.flashcards-main{flex:1;display:flex;flex-direction:column;align-items:center;padding:40px 20px;max-width:700px;margin:0 auto;width:100%}.card-area{width:100%;margin-bottom:30px;cursor:pointer}.flashcard{width:100%;height:300px;perspective:1000px;position:relative}.card-front,.card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;background:#fff;border-radius:16px;box-shadow:0 10px 40px #0000001a;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;transition:transform .6s}.card-front{transform:rotateY(0)}.card-back{transform:rotateY(180deg);background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.flashcard.flipped .card-front{transform:rotateY(-180deg)}.flashcard.flipped .card-back{transform:rotateY(0)}.card-label{position:absolute;top:15px;left:20px;font-size:.75rem;text-transform:uppercase;letter-spacing:1px;opacity:.6;font-weight:600}.flashcard p{font-size:1.3rem;text-align:center;line-height:1.6;margin:0}.flip-hint{text-align:center;color:#999;font-size:.85rem;margin-top:15px}.card-controls{display:flex;gap:15px;align-items:center;margin-bottom:25px}.btn-nav{background:#fff;border:2px solid #e5e7eb;padding:12px 24px;border-radius:8px;cursor:pointer;font-weight:500;color:#333;transition:all .2s}.btn-nav:hover:not(:disabled){border-color:#667eea;color:#667eea}.btn-nav:disabled{opacity:.4;cursor:not-allowed}.btn-known{background:#fff;border:2px solid #10b981;color:#10b981;padding:12px 24px;border-radius:8px;cursor:pointer;font-weight:600;transition:all .2s}.btn-known:hover{background:#ecfdf5}.btn-known.active{background:#10b981;color:#fff}.extra-controls{margin-bottom:30px}.btn-shuffle{background:none;border:none;color:#667eea;cursor:pointer;font-size:1rem;padding:10px 20px}.btn-shuffle:hover{text-decoration:underline}.progress-bar{width:100%;height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(135deg,#667eea,#764ba2);transition:width .3s ease}@media(max-width:768px){.flashcards-header{padding:15px 20px;flex-wrap:wrap;gap:10px}.flashcards-header h1{font-size:1.1rem;order:-1;width:100%;text-align:center}.flashcards-main{padding:25px 15px}.flashcard{height:250px}.flashcard p{font-size:1.1rem}.card-controls{flex-wrap:wrap;justify-content:center}}.match-container{min-height:100vh;background:#f5f7fa}.match-loading{min-height:100vh;display:flex;align-items:center;justify-content:center;color:#666}.match-header{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:20px 30px;display:flex;justify-content:space-between;align-items:center}.match-header h1{margin:0;font-size:1.3rem}.match-stats{display:flex;gap:20px;font-weight:500}.timer{font-variant-numeric:tabular-nums}.match-main{padding:30px 20px;max-width:800px;margin:0 auto}.match-instructions{text-align:center;color:#666;margin-bottom:25px}.tiles-grid{display:grid;gap:15px;margin-bottom:25px}.tile{aspect-ratio:1;min-height:100px;perspective:1000px;cursor:pointer;border:none;background:none;padding:0}.tile-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .4s}.tile.flipped .tile-inner,.tile.matched .tile-inner{transform:rotateY(180deg)}.tile-front,.tile-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:12px;display:flex;align-items:center;justify-content:center;padding:10px;box-sizing:border-box}.tile-front{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:2rem;font-weight:700}.tile-back{transform:rotateY(180deg);background:#fff;box-shadow:0 4px 15px #0000001a}.tile.question .tile-back{border:3px solid #667eea;color:#333}.tile.answer .tile-back{border:3px solid #10b981;color:#333}.tile-back span{font-size:.85rem;line-height:1.4;text-align:center;overflow:hidden;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical}.tile.matched .tile-back{background:#ecfdf5;border-color:#10b981}.tile:disabled{cursor:default}.match-progress{text-align:center;color:#666;font-size:.95rem}.match-complete{min-height:100vh;background:linear-gradient(135deg,#10b981,#059669);display:flex;align-items:center;justify-content:center;padding:20px}.complete-card{background:#fff;border-radius:20px;padding:50px 40px;text-align:center;max-width:400px;width:100%;box-shadow:0 20px 60px #0003}.complete-card h2{margin:0 0 10px;font-size:2rem;color:#333}.complete-card>p{color:#666;margin-bottom:30px}.stats{display:flex;justify-content:center;gap:40px;margin-bottom:30px}.stat{display:flex;flex-direction:column}.stat-value{font-size:2rem;font-weight:700;color:#10b981}.stat-label{font-size:.85rem;color:#666}.btn-play-again{background:linear-gradient(135deg,#10b981,#059669);color:#fff;border:none;padding:14px 30px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .2s}.btn-back-modes{background:none;border:2px solid #e5e7eb;padding:12px 30px;border-radius:8px;font-weight:500;cursor:pointer;color:#666}.btn-back-modes:hover{border-color:#10b981;color:#10b981}@media(max-width:600px){.match-header{flex-wrap:wrap;gap:10px;padding:15px 20px}.match-header h1{order:-1;width:100%;text-align:center}.tiles-grid{gap:10px}.tile{min-height:80px}.tile-back span{font-size:.75rem;-webkit-line-clamp:3}.complete-card{padding:35px 25px}}.learn-container{min-height:100vh;background:#f5f7fa;display:flex;flex-direction:column}.learn-loading{min-height:100vh;display:flex;align-items:center;justify-content:center;color:#666}.learn-header{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;padding:20px 30px;display:flex;justify-content:space-between;align-items:center}.learn-header h1{margin:0;font-size:1.3rem}.learn-progress{font-weight:600;font-size:1.1rem}.learn-main{flex:1;padding:40px 20px;max-width:700px;margin:0 auto;width:100%}.question-card{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px #00000014;margin-bottom:30px}.question-label{font-size:.75rem;text-transform:uppercase;letter-spacing:1px;color:#999;margin-bottom:12px}.answer-section{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px #00000014;margin-bottom:30px}.answer-input{width:100%;padding:16px;border:2px solid #e5e7eb;border-radius:10px;font-size:1.1rem;margin-bottom:20px;transition:border-color .2s}.answer-input:focus{outline:none;border-color:#f59e0b}.answer-actions{display:flex;gap:15px}.btn-check{flex:1;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border:none;padding:14px 24px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .2s,opacity .2s}.btn-check:hover:not(:disabled){transform:translateY(-2px)}.btn-check:disabled{opacity:.5;cursor:not-allowed}.btn-show{background:none;border:2px solid #e5e7eb;padding:14px 24px;border-radius:8px;color:#666;font-weight:500;cursor:pointer;transition:border-color .2s}.btn-show:hover{border-color:#ccc}.feedback-section{text-align:center}.feedback-message{display:flex;align-items:center;justify-content:center;gap:10px;font-size:1.3rem;font-weight:600;margin-bottom:20px}.feedback-section.correct .feedback-message{color:#10b981}.feedback-section.incorrect .feedback-message{color:#ef4444}.feedback-section.shown .feedback-message{color:#8b5cf6}.feedback-icon{font-size:1.5rem}.your-answer{background:#fef2f2;color:#991b1b;padding:12px 16px;border-radius:8px;margin-bottom:15px;text-align:left}.correct-answer{background:#ecfdf5;padding:16px;border-radius:8px;text-align:left;margin-bottom:25px}.correct-answer strong{color:#065f46;display:block;margin-bottom:8px}.correct-answer p{margin:0;color:#333;line-height:1.5}.btn-next{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:14px 40px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .2s}.progress-fill{height:100%;background:linear-gradient(135deg,#f59e0b,#d97706);transition:width .3s ease}.learn-complete{min-height:100vh;background:linear-gradient(135deg,#f59e0b,#d97706);display:flex;align-items:center;justify-content:center;padding:20px}.complete-card{background:#fff;border-radius:20px;padding:50px 40px;text-align:center;max-width:450px;width:100%;box-shadow:0 20px 60px #0003}.complete-card h2{margin:0 0 25px;color:#333;font-size:1.8rem}.score-circle{width:140px;height:140px;border-radius:50%;background:linear-gradient(135deg,#f59e0b,#d97706);display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 30px;color:#fff}.score-percentage{font-size:2.5rem;font-weight:700}.score-label{font-size:.85rem;opacity:.9}.score-breakdown{display:flex;justify-content:center;gap:30px;margin-bottom:30px}.score-item{display:flex;flex-direction:column;align-items:center}.score-value{font-size:1.8rem;font-weight:700}.score-item.correct .score-value{color:#10b981}.score-item.incorrect .score-value{color:#ef4444}.score-item.shown .score-value{color:#8b5cf6}.score-text{font-size:.85rem;color:#666}.btn-restart{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border:none;padding:14px 30px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer}.btn-modes:hover{border-color:#f59e0b;color:#f59e0b}@media(max-width:768px){.learn-header{flex-wrap:wrap;gap:10px;padding:15px 20px}.learn-header h1{order:-1;width:100%;text-align:center}.learn-main{padding:25px 15px}.question-card,.answer-section{padding:20px}.answer-actions{flex-direction:column}.complete-card{padding:35px 25px}}.test-container{min-height:100vh;background:#f5f7fa;display:flex;flex-direction:column}.test-loading,.test-error{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#666;text-align:center;padding:20px}.test-error h2{margin-bottom:10px;color:#333}.test-error button{margin-top:20px;padding:12px 24px;background:#ef4444;color:#fff;border:none;border-radius:8px;cursor:pointer}.test-header{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;padding:20px 30px;display:flex;justify-content:space-between;align-items:center}.test-header h1{margin:0;font-size:1.3rem}.btn-back{background:#fff3;color:#fff;border:none;padding:10px 18px;border-radius:8px;cursor:pointer;font-weight:500}.btn-back:hover{background:#ffffff4d}.test-progress{font-weight:600;font-size:1.1rem}.test-main{flex:1;padding:40px 20px;max-width:700px;margin:0 auto;width:100%}.question-card{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px #00000014;margin-bottom:25px}.question-number{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:#ef4444;font-weight:600;margin-bottom:12px}.question-text{font-size:1.3rem;color:#333;margin:0;line-height:1.6}.options-list{display:flex;flex-direction:column;gap:12px;margin-bottom:25px}.option-btn{display:flex;align-items:center;gap:15px;background:#fff;border:2px solid #e5e7eb;border-radius:12px;padding:16px 20px;cursor:pointer;transition:all .2s;text-align:left}.option-btn:hover:not(:disabled){border-color:#ef4444}.option-btn.selected{border-color:#ef4444;background:#fef2f2}.option-btn.correct{border-color:#10b981;background:#ecfdf5}.option-btn.incorrect{border-color:#ef4444;background:#fef2f2}.option-btn:disabled{cursor:default}.option-letter{width:32px;height:32px;border-radius:50%;background:#f3f4f6;display:flex;align-items:center;justify-content:center;font-weight:600;color:#666;flex-shrink:0}.option-btn.selected .option-letter{background:#ef4444;color:#fff}.option-btn.correct .option-letter{background:#10b981;color:#fff}.option-btn.incorrect .option-letter{background:#ef4444;color:#fff}.option-text{flex:1;color:#333;line-height:1.4}.test-actions{margin-bottom:25px}.btn-submit,.btn-next{width:100%;padding:16px;border:none;border-radius:10px;font-weight:600;font-size:1.1rem;cursor:pointer;transition:transform .2s,opacity .2s}.btn-submit{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff}.btn-submit:hover:not(:disabled){transform:translateY(-2px)}.btn-submit:disabled{opacity:.5;cursor:not-allowed}.btn-next{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-next:hover{transform:translateY(-2px)}.progress-bar{height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(135deg,#ef4444,#dc2626);transition:width .3s ease}.test-complete{min-height:100vh;background:linear-gradient(135deg,#ef4444,#dc2626);display:flex;align-items:center;justify-content:center;padding:20px}.test-complete .complete-card{background:#fff;border-radius:20px;padding:40px;max-width:600px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px #0003}.test-complete h2{text-align:center;margin:0 0 25px;color:#333;font-size:1.8rem}.score-display{text-align:center;margin-bottom:30px}.score-circle{display:flex;align-items:baseline;justify-content:center;font-size:3rem;font-weight:700;color:#333}.score-divider{margin:0 5px;color:#999;font-weight:400}.score-total{color:#999}.score-percentage{color:#ef4444;font-weight:600;font-size:1.2rem;margin:10px 0 0}.results-summary{margin-bottom:30px}.results-summary h3{color:#333;margin:0 0 15px;font-size:1.1rem}.results-list{display:flex;flex-direction:column;gap:10px;max-height:300px;overflow-y:auto}.result-item{display:flex;gap:12px;padding:12px;border-radius:8px}.result-item.correct{background:#ecfdf5}.result-item.incorrect{background:#fef2f2}.result-icon{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.85rem;flex-shrink:0}.result-item.correct .result-icon{background:#10b981;color:#fff}.result-item.incorrect .result-icon{background:#ef4444;color:#fff}.result-content{flex:1}.result-question{margin:0 0 5px;color:#333;font-size:.95rem}.result-your-answer{margin:0;color:#ef4444;font-size:.85rem}.result-correct{margin:0;color:#10b981;font-size:.85rem}.complete-actions{display:flex;flex-direction:column;gap:12px}.btn-restart{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;border:none;padding:14px 30px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer}.btn-restart:hover{transform:translateY(-2px)}.btn-modes{background:none;border:2px solid #e5e7eb;padding:12px 30px;border-radius:8px;color:#666;font-weight:500;cursor:pointer}.btn-modes:hover{border-color:#ef4444;color:#ef4444}@media(max-width:768px){.test-header{flex-wrap:wrap;gap:10px;padding:15px 20px}.test-header h1{order:-1;width:100%;text-align:center}.test-main{padding:25px 15px}.question-card{padding:20px}.question-text{font-size:1.1rem}.test-complete .complete-card{padding:30px 20px}}.gravity-container{height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#0f0f23,#1a1a2e,#16213e);overflow:hidden}.gravity-loading{height:100vh;display:flex;align-items:center;justify-content:center;background:#0f0f23;color:#fff}.gravity-start{height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#0f0f23,#1a1a2e,#16213e);padding:20px}.start-card{background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:50px 40px;text-align:center;color:#fff;max-width:400px}.start-card h1{margin:0 0 15px;font-size:2.5rem}.start-card>p{color:#fffc;margin-bottom:10px}.rules{background:#0003;border-radius:10px;padding:15px;margin:20px 0;text-align:left}.rules p{margin:8px 0;color:#ffffffb3;font-size:.9rem}.high-score{color:gold;font-weight:600;margin:15px 0}.btn-start{background:linear-gradient(135deg,#8b5cf6,#6d28d9);color:#fff;border:none;padding:16px 50px;border-radius:10px;font-size:1.2rem;font-weight:600;cursor:pointer;margin-bottom:15px;transition:transform .2s,box-shadow .2s;width:100%}.btn-start:hover{transform:translateY(-3px);box-shadow:0 10px 30px #8b5cf666}.btn-back-modes{background:none;border:1px solid rgba(255,255,255,.3);color:#ffffffb3;padding:12px 30px;border-radius:8px;cursor:pointer;width:100%}.btn-back-modes:hover{border-color:#ffffff80;color:#fff}.gravity-header{background:#0000004d;padding:15px 20px;display:flex;justify-content:space-between;align-items:center;color:#fff}.btn-back{background:#ffffff1a;color:#fff;border:none;padding:8px 16px;border-radius:6px;cursor:pointer}.btn-back:hover{background:#fff3}.game-stats{display:flex;gap:25px;font-size:1.1rem;font-weight:500}.stat-score{color:#8b5cf6}.stat-streak{color:#f59e0b}.gravity-arena{flex:1;position:relative;overflow:hidden}.questions-area{position:absolute;inset:0 0 100px}.falling-question{position:absolute;transform:translate(-50%);background:linear-gradient(135deg,#8b5cf6,#6d28d9);color:#fff;padding:12px 20px;border-radius:10px;font-size:.95rem;max-width:250px;text-align:center;box-shadow:0 5px 20px #8b5cf666;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 5px 20px #8b5cf666}50%{box-shadow:0 5px 30px #8b5cf699}}.danger-zone{position:absolute;bottom:80px;left:0;right:0;height:4px;background:linear-gradient(90deg,transparent,#ef4444,transparent);opacity:.5}.answer-form{position:absolute;bottom:0;left:0;right:0;padding:20px;display:flex;gap:12px;background:#00000080}.answer-form input{flex:1;padding:16px 20px;border:2px solid rgba(255,255,255,.2);border-radius:10px;background:#ffffff1a;color:#fff;font-size:1.1rem}.answer-form input:focus{outline:none;border-color:#8b5cf6}.answer-form input::placeholder{color:#ffffff80}.answer-form button{background:linear-gradient(135deg,#8b5cf6,#6d28d9);color:#fff;border:none;padding:16px 30px;border-radius:10px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .1s}.answer-form button:hover{transform:scale(1.05)}.gravity-gameover{height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#0f0f23,#1a1a2e,#16213e);padding:20px}.gameover-card{background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:50px 40px;text-align:center;color:#fff;max-width:400px;width:100%}.gameover-card h2{margin:0 0 25px;font-size:2rem}.final-score{display:flex;flex-direction:column;margin-bottom:15px}.final-score .score-value{font-size:4rem;font-weight:700;color:#8b5cf6}.final-score .score-label{font-size:1rem;color:#fff9}.new-record{color:gold;font-size:1.2rem;font-weight:600;margin:10px 0}.gameover-actions{display:flex;flex-direction:column;gap:12px;margin-top:25px}.btn-play-again{background:linear-gradient(135deg,#8b5cf6,#6d28d9);color:#fff;border:none;padding:14px 30px;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer}.btn-play-again:hover{transform:translateY(-2px)}@media(max-width:768px){.start-card,.gameover-card{padding:35px 25px}.game-stats{gap:15px;font-size:.95rem}.falling-question{font-size:.85rem;padding:10px 15px;max-width:200px}.answer-form{flex-direction:column;gap:10px}.answer-form button{padding:14px}}.cpd-presentation{min-height:100vh;background:linear-gradient(135deg,#0d9488,#065f46);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;position:relative;outline:none}.slide-container{width:100%;max-width:960px;min-height:540px;display:flex;align-items:center;justify-content:center}.slide{width:100%;padding:2rem;animation:fadeIn .3s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.slide h1{font-family:Georgia,serif;font-size:3rem;font-weight:700;color:#fff;margin-bottom:.5rem;text-align:center}.slide h2{font-family:Georgia,serif;font-size:2.25rem;font-weight:700;color:#0d9488;margin-bottom:.5rem}.slide h3{font-size:1.25rem;font-weight:700;color:#1e293b;margin-bottom:.25rem}.slide .subtitle{font-size:1.25rem;color:#ffffffd9;text-align:center;margin-bottom:2rem}.slide .slide-subtitle{font-size:1rem;color:#64748b;margin-bottom:2rem}.badge{display:inline-block;background:#fff3;color:#fff;padding:.5rem 1rem;border-radius:2rem;font-size:.875rem;font-weight:600;margin-bottom:1rem}.badge-orange{background:#f97316}.slide-title{text-align:center}.slide-title .title-footer{display:flex;justify-content:center;gap:2rem;margin-top:3rem;color:#ffffffb3}.slide-title .url{font-weight:600;color:#fff}.slide-overview{background:#fff;border-radius:1rem;padding:2rem}.slide-overview .duration-badge{display:inline-block;background:#f0fdf4;color:#166534;padding:.25rem .75rem;border-radius:1rem;font-size:.875rem;font-weight:600;margin-bottom:1.5rem}.overview-items{display:flex;flex-direction:column;gap:1rem}.overview-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:#f8fafc;border-radius:.5rem}.overview-item .item-number{width:2.5rem;height:2.5rem;background:#0d9488;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.overview-item .item-content{flex:1}.overview-item .item-content h3{margin:0}.overview-item .item-content p{margin:0;color:#64748b;font-size:.875rem}.overview-item .item-time{color:#64748b;font-size:.875rem}.slide-problem{background:#fff;border-radius:1rem;padding:2rem}.problem-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.problem-card{background:#fef2f2;border-left:4px solid #EF4444;padding:1.5rem;border-radius:.5rem}.problem-card .problem-icon{font-size:2rem;margin-bottom:.5rem;display:block}.problem-card h3{color:#991b1b;margin-bottom:.25rem}.problem-card p{color:#64748b;font-size:.875rem;margin:0}.slide-solution{background:#fff;border-radius:1rem;padding:2rem}.solution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.solution-card{background:#f0fdf4;border-left:4px solid #22C55E;padding:1.5rem;border-radius:.5rem}.solution-card .solution-icon{font-size:2rem;margin-bottom:.5rem;display:block}.solution-card h3{color:#166534;margin-bottom:.25rem}.solution-card p{color:#64748b;font-size:.875rem;margin:0}.slide-demo{text-align:center}.demo-steps{display:flex;justify-content:center;align-items:center;gap:.5rem;margin-top:3rem}.demo-step{display:flex;flex-direction:column;align-items:center;gap:.5rem}.demo-step .step-circle{width:3rem;height:3rem;border:2px solid #0D9488;border-radius:.5rem;background:#ffffff1a}.demo-step.active .step-circle{background:#f97316;border-color:#f97316}.demo-step span{color:#ffffffb3;font-size:.875rem}.demo-step .step-connector{width:2rem;height:2px;background:#ffffff4d;margin:0 .5rem}.slide-modes{background:#fff;border-radius:1rem;padding:2rem}.modes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.mode-card{background:#f8fafc;border:2px solid #E2E8F0;border-radius:.75rem;padding:1.5rem;text-align:left}.mode-card .mode-icon{width:3rem;height:3rem;border-radius:.5rem;margin-bottom:1rem}.mode-card h3{margin-bottom:.5rem}.mode-card p{color:#64748b;font-size:.875rem;margin:0;line-height:1.5}.slide-principles{background:#fff;border-radius:1rem;padding:2rem}.principles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.principle-card{background:linear-gradient(135deg,var(--accent-color) 0%,color-mix(in srgb,var(--accent-color) 70%,#000) 100%);border-radius:.75rem;padding:1.5rem;color:#fff}.principle-card .principle-label{font-size:.75rem;opacity:.8}.principle-card h3{color:#fff;font-family:Georgia,serif;font-size:1.5rem;margin:.5rem 0}.principle-card p{font-size:.875rem;opacity:.9;line-height:1.5;margin-bottom:1rem}.principle-card .principle-tip{background:#ffffff26;border-radius:.5rem;padding:.75rem;font-size:.875rem}.slide-workflow{background:#f8fafc;border-radius:1rem;padding:2rem}.workflow-section{display:flex;align-items:center;gap:1rem;margin-bottom:.5rem}.workflow-label{background:#0d9488;color:#fff;padding:.5rem 1rem;border-radius:2rem;font-size:.875rem;min-width:5rem;text-align:center}.workflow-label.student{background:#f97316}.workflow-steps{display:flex;align-items:center;gap:.5rem;flex:1}.workflow-step{display:flex;align-items:center}.workflow-step .step-box{background:#fff;border:2px solid #0D9488;border-radius:.5rem;padding:.75rem 1rem;text-align:center;min-width:8rem}.workflow-step .step-box.student-step{border-color:#f97316}.workflow-step .step-box strong{display:block;font-size:.75rem;color:#0d9488}.workflow-step .step-box.student-step strong{color:#f97316}.workflow-step .step-box span{font-size:.75rem;color:#64748b}.workflow-step.highlight .step-box{background:#f97316;border-color:#f97316}.workflow-step.highlight .step-box strong,.workflow-step.highlight .step-box span{color:#fff}.workflow-step.highlight-green .step-box{background:#22c55e;border-color:#22c55e}.workflow-step.highlight-green .step-box strong,.workflow-step.highlight-green .step-box span{color:#fff}.workflow-step .arrow{color:#0d9488;font-size:1.25rem;margin:0 .25rem}.workflow-step .arrow.orange{color:#f97316}.workflow-arrow-down{text-align:center;color:#64748b;font-size:1.5rem;margin:.5rem 0}.workflow-benefits{display:flex;justify-content:center;gap:2rem;margin-top:1.5rem}.workflow-benefits .benefit{color:#22c55e;font-size:.875rem}.slide-getting-started{background:#fff;border-radius:1rem;padding:2rem}.getting-started-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.docs-section{background:#f1f5f9;border-radius:.75rem;padding:1.5rem}.docs-section .section-label{color:#64748b;font-size:.75rem;font-weight:600}.docs-section h3{color:#0d9488;font-size:1.5rem;margin:.5rem 0}.docs-section p{color:#1e293b;font-size:.875rem;margin-bottom:1rem}.docs-section .divider{border-top:1px solid #E2E8F0;margin:1rem 0}.docs-section .guides-label{color:#64748b;font-size:.875rem}.docs-section ul{list-style:disc;padding-left:1.5rem;margin-top:.5rem}.docs-section li{color:#1e293b;font-size:1rem;line-height:2}.quickstart-section h3{color:#1e293b;margin-bottom:1rem}.quickstart-steps{display:flex;flex-direction:column;gap:1rem}.quickstart-step{display:flex;align-items:flex-start;gap:.75rem}.quickstart-step .step-indicator{width:1.5rem;height:1.5rem;background:#0d9488;border-radius:.25rem;flex-shrink:0;margin-top:.125rem}.quickstart-step.highlight .step-indicator{background:#f97316}.quickstart-step .step-content strong{display:block;color:#1e293b;font-size:.875rem}.quickstart-step .step-content span{color:#64748b;font-size:.875rem}.slide-activity{text-align:center}.activity-box{background:#fff;border-radius:1rem;padding:2rem;max-width:600px;margin:0 auto 2rem}.activity-box p{color:#1e293b;font-size:1rem;line-height:1.6;margin-bottom:1rem}.activity-box .time-badge{display:inline-block;background:#ecfdf5;color:#0d9488;padding:.5rem 1rem;border-radius:2rem;font-weight:600}.activity-url{color:#fff;font-weight:700;font-size:1.25rem}.slide-tips{background:#fff;border-radius:1rem;padding:2rem}.tips-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.tips-column{padding-top:1rem}.tips-column .tips-header{font-size:1rem;font-weight:700;margin-bottom:1rem;padding:.75rem 1rem;border-radius:.25rem}.tips-column.do .tips-header{background:#f0fdf4;color:#166534;border-left:4px solid #22C55E}.tips-column.dont .tips-header{background:#fef2f2;color:#991b1b;border-left:4px solid #EF4444}.tip-item{color:#1e293b;font-size:.875rem;line-height:1.5;margin-bottom:.75rem}.tip-item strong{color:#1e293b}.slide-thankyou{text-align:center}.links-box{background:#ffffff1a;border:1px solid white;border-radius:1rem;padding:2rem;display:flex;justify-content:center;gap:3rem;margin:2rem auto;max-width:500px}.link-item{text-align:center}.link-item .link-label{display:block;color:#ffffffb3;font-size:.75rem;margin-bottom:.5rem}.link-item strong{color:#fff;font-size:1rem}.slide-thankyou .author{color:#ffffffd9;font-size:1rem}.presentation-controls{display:flex;align-items:center;gap:2rem;margin-top:2rem}.nav-button{background:#fff3;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:.5rem;font-size:1rem;cursor:pointer;transition:background .2s}.nav-button:hover:not(:disabled){background:#ffffff4d}.nav-button:disabled{opacity:.5;cursor:not-allowed}.slide-indicators{display:flex;gap:.5rem}.indicator{width:.75rem;height:.75rem;border-radius:50%;background:#ffffff4d;border:none;cursor:pointer;transition:background .2s}.indicator.active{background:#fff}.indicator:hover{background:#fff9}.slide-counter{position:absolute;bottom:1rem;left:1rem;color:#ffffffb3;font-size:.875rem}.exit-button{position:absolute;top:1rem;right:1rem;background:#fff3;color:#fff;border:none;width:2.5rem;height:2.5rem;border-radius:50%;font-size:1.25rem;cursor:pointer;transition:background .2s}.exit-button:hover{background:#ffffff4d}@media(max-width:900px){.problem-grid,.solution-grid,.tips-grid,.getting-started-grid{grid-template-columns:1fr}.modes-grid{grid-template-columns:repeat(2,1fr)}.principles-grid{grid-template-columns:1fr}.workflow-steps{flex-wrap:wrap;justify-content:center}.slide h1{font-size:2rem}.slide h2{font-size:1.75rem}}@media(max-width:600px){.modes-grid{grid-template-columns:1fr}.links-box{flex-direction:column;gap:1.5rem}.workflow-section{flex-direction:column}.workflow-benefits{flex-direction:column;gap:.5rem}}