*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#2d3748;background:#f7fafc;font-size:16px}.app-container{min-height:100vh;display:flex;flex-direction:column}@media (max-width: 768px){.app-header{padding:1rem}.header-content{flex-direction:column;gap:1rem;text-align:center}.tab-navigation{padding:0 1rem;flex-wrap:wrap;gap:.5rem}.tab-btn{padding:.75rem 1rem;font-size:1rem}.tab-content-container{padding:1rem}.selection-header h1{font-size:2.5rem}.avatar-grid{grid-template-columns:1fr;gap:1.5rem}.practice-header{flex-direction:column;gap:1rem;align-items:stretch}.practice-controls{justify-content:center}.iframe-container{height:500px}#practice-tips{grid-template-columns:1fr}}@media (max-width: 480px){.logo-text{font-size:1.2rem}.selection-header h1{font-size:1.8rem}.selection-subtitle{font-size:1.1rem}.card-icon{font-size:2.5rem}.card-title{font-size:1.1rem}.practice-info h2{font-size:2rem}.iframe-container{height:400px}}.avatar-card{background:#fff;border-radius:12px;box-shadow:0 4px 6px #0000000d;border:2px solid #e2e8f0;transition:all .3s ease;overflow:hidden}.avatar-card:hover{transform:translateY(-4px);box-shadow:0 12px 25px #0000001a;border-color:#667eea}.card-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:1.5rem;text-align:center}.card-icon{font-size:3rem;margin-bottom:.5rem}.card-title{font-size:1.5rem;font-weight:700}.card-body{padding:1.5rem}.card-description{font-size:1.1rem;color:#4a5568;margin-bottom:1.5rem;line-height:1.6}.card-details{display:flex;flex-direction:column;gap:.75rem}.detail-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem;background:#f8f9fa;border-radius:6px}.detail-label{font-weight:600;color:#2d3748;font-size:1rem}.detail-value{color:#4a5568;text-align:right;flex:1;margin-left:1rem;font-size:1rem}.difficulty{padding:.25rem .75rem;border-radius:20px;font-size:.8rem;font-weight:700;text-transform:uppercase}.difficulty.intermediate{background:#fed7d7;color:#c53030}.difficulty.advanced{background:#fbb6ce;color:#97266d}.card-footer{padding:1.5rem;border-top:1px solid #e2e8f0}.select-btn{width:100%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem 2rem;border-radius:8px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.select-btn:hover{transform:translateY(-2px);box-shadow:0 8px 16px #667eea4d}.tab-content-container{flex:1;max-width:95%;margin:0 auto;width:100%;padding:2rem}.tab-content{display:none}.tab-content.active{display:block}.selection-header{text-align:center;margin-bottom:3rem}.selection-header h1{font-size:3rem;color:#2d3748;margin-bottom:1rem}.selection-subtitle{font-size:1.4rem;color:#718096;max-width:80%;margin:0 auto}.search-filter-section{display:flex;gap:1rem;margin-bottom:2rem;align-items:center;justify-content:center;flex-wrap:wrap}.search-container{display:flex;align-items:center;background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a;overflow:hidden;border:2px solid #e2e8f0;transition:border-color .3s ease}.search-container:focus-within{border-color:#667eea}.search-input{border:none;outline:none;padding:.75rem 1rem;font-size:1rem;width:300px;background:transparent}.search-input::placeholder{color:#a0aec0}.search-btn{background:#667eea;color:#fff;border:none;padding:.75rem 1rem;cursor:pointer;font-size:1.2rem;transition:background-color .3s ease}.search-btn:hover{background:#5a67d8}.category-select{padding:.75rem 1rem;border:2px solid #e2e8f0;border-radius:8px;background:#fff;font-size:1rem;cursor:pointer;outline:none;transition:border-color .3s ease}.category-select:focus{border-color:#667eea}.avatar-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(380px,1fr));gap:2rem;margin-top:2rem;max-width:100%}.stage-grid{margin-bottom:4rem;border-bottom:1px solid #e2e8f0;padding-bottom:2rem}.tab-content-container[data-v-b5452b60]{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.practice-header[data-v-b5452b60]{display:flex;justify-content:space-between;align-items:flex-start;padding:1.5rem;background:#fff;box-shadow:0 2px 8px #0000001a}.practice-info[data-v-b5452b60]{flex:1}.practice-info h2[data-v-b5452b60]{color:#2d3748;font-size:1.8rem;font-weight:700;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.practice-info p[data-v-b5452b60]{color:#4a5568;font-size:1.1rem;line-height:1.6;margin:0}.practice-controls[data-v-b5452b60]{display:flex;gap:1rem;flex-shrink:0}.control-btn[data-v-b5452b60]{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.control-btn[data-v-b5452b60]:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 16px #667eea4d}.control-btn[data-v-b5452b60]:disabled{opacity:.6;cursor:not-allowed;transform:none}.iframe-container[data-v-b5452b60]{background:#fff;border:2px solid #e2e8f0;border-radius:10px;height:700px;position:relative;overflow:hidden}#practice-iframe[data-v-b5452b60]{width:100%;height:100%;border:none;transition:opacity .3s ease}.loading-overlay[data-v-b5452b60]{position:absolute;inset:0;background:#fffffff2;display:flex;align-items:center;justify-content:center;z-index:10}.loading-spinner[data-v-b5452b60]{text-align:center}.spinner[data-v-b5452b60]{width:50px;height:50px;border:4px solid #e2e8f0;border-top:4px solid #667eea;border-radius:50%;animation:spin-b5452b60 1s linear infinite;margin:0 auto 1rem}@keyframes spin-b5452b60{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-text[data-v-b5452b60]{color:#4a5568;font-size:1.1rem;font-weight:500;margin:0}.app-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:1rem 2rem;box-shadow:0 2px 10px #0000001a}.header-content{display:flex;justify-content:space-between;align-items:center;max-width:95%;margin:0 auto;width:100%}.logo{display:flex;align-items:center;gap:.75rem}.logo-icon{font-size:2rem}.logo-text{font-size:1.8rem;font-weight:700}.header-info{text-align:right}.institution{font-size:1rem;opacity:.9}.tab-navigation{background:#fff;border-bottom:1px solid #e2e8f0;padding:0 2rem;display:flex;gap:1rem;margin:0 auto;width:100%}.tab-btn{background:none;border:none;padding:1rem 1.5rem;cursor:pointer;border-bottom:3px solid transparent;transition:all .3s ease;font-size:1.1rem;font-weight:500;color:#718096}.tab-btn:hover:not(:disabled){color:#667eea;background:#f7faff}.tab-btn.active{color:#667eea;border-bottom-color:#667eea;background:#f7faff}.tab-btn:disabled{opacity:.5;cursor:not-allowed}.bot-indicator{display:inline-block;margin-left:.5rem;padding:.2rem .5rem;background:#667eea;color:#fff;border-radius:12px;font-size:.8rem;font-weight:400}.main-content{min-height:calc(100vh - 140px);display:flex;flex-direction:column;background:#f8fafc}