.error-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background-color:#f8f9fa;font-family:Arial,sans-serif;text-align:center;padding:20px}.error-title{font-size:2.5rem;color:#dc3545;margin-bottom:20px}.error-message{font-size:1.2rem;color:#6c757d;margin-bottom:10px}.error-instruction{font-size:1rem;color:#6c757d;margin-top:10px}.category-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;padding:20px;text-align:center}.category-buttons{display:flex;gap:20px;margin-top:30px}.category-btn{padding:15px 30px;font-size:18px;border-radius:10px;border:2px solid #ddd;cursor:pointer;color:#fff;transition:all .3s}.category-btn.active{background-color:#4caf50;color:#fff;border-color:#4caf50}.category-btn:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}.menu-container{padding:20px;max-width:600px;margin:0 auto}.menu-buttons{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:30px}.menu-btn{display:flex;align-items:center;justify-content:center;padding:20px;background-color:#4caf50;color:#fff;text-decoration:none;border-radius:10px;font-size:16px;text-align:center;transition:all .3s}.menu-btn:hover{background-color:#45a049;transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}.tickets-container{padding:20px;max-width:800px;margin:0 auto}.tickets-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px;margin-top:20px}.ticket-card{padding:20px;background-color:#f8f8f8;border-radius:10px;text-decoration:none;color:#333;position:relative;transition:all .3s;text-align:center}.ticket-card:hover{transform:translateY(-3px);box-shadow:0 4px 8px #0000001a;background-color:#e8f5e9}.ticket-status{position:absolute;top:10px;right:10px;width:25px;height:25px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.ticket-status.passed{background-color:#4caf50;color:#fff}.ticket-status.failed{background-color:#f44336;color:#fff}.exam-container{padding:20px;max-width:800px;margin:0 auto;position:relative}.loading,.no-questions{text-align:center;padding:40px;font-size:18px}.header-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:15px;height:40px}.timer{background-color:#333;color:#fff;padding:8px 12px;border-radius:20px;font-weight:700;font-size:.9rem;height:100%;display:flex;align-items:center}.back-btn{background:none;border:none;color:var(--tg-theme-link-color, #3366cc);font-size:1rem;cursor:pointer;padding:8px 12px;height:100%;display:flex;align-items:center}.favorite-btn{width:40px;height:40px;border-radius:50%;background-color:#ffeb3b;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;padding:0}.favorite-btn.active{background-color:#ffc107}.questions-scroll-container{width:100%;overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none;margin-bottom:15px}.questions-scroll-container::-webkit-scrollbar{display:none}.question-nav{display:inline-flex;gap:5px;padding-bottom:5px;min-width:100%}.nav-btn{width:40px;height:40px;min-width:40px;border-radius:50%;border:1px solid #ddd;background-color:#f8f8f8;cursor:pointer;display:flex;align-items:center;justify-content:center}.nav-btn.correct{background-color:#4caf50;color:#fff;border-color:#4caf50}.nav-btn.current{background-color:#7b7f7c;color:#fff;border-color:#7b7f7c}.nav-btn.wrong{background-color:#f44336;color:#fff;border-color:#f44336}.nav-btn.exam{background-color:#ccc;color:#fff;border-color:#ccc}.question{margin-bottom:30px}.question h3{margin-bottom:10px}.question-image{max-width:100%;height:auto;border-radius:5px;margin-top:10px}.answers{display:grid;grid-template-columns:1fr;gap:5px;margin-bottom:20px}.answer-btn{padding:15px;border:1px solid #ddd;border-radius:5px;background-color:#f8f8f8;text-align:left;cursor:pointer;transition:all .2s}.answer-btn:hover:not(:disabled){background-color:#e8f5e9}.answer-btn:disabled{cursor:not-allowed}.answer-btn.correct{background-color:#4caf50;color:#fff}.answer-btn.wrong{background-color:#f44336;color:#fff}.answer-btn.exam{background-color:#736362;color:#fff}.explanation{padding:15px;background-color:#fff8e1;border-left:4px solid #ffc107;margin-bottom:20px;border-radius:0 5px 5px 0}.next-btn{padding:10px 20px;background-color:#2196f3;color:#fff;border:none;border-radius:5px;cursor:pointer;width:100%;margin-top:20px}.result-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000}.result-modal{background:var(--tg-theme-bg-color, white);padding:25px;border-radius:15px;max-width:90%;width:500px;max-height:80vh;overflow-y:auto;color:var(--tg-theme-text-color, #000)}.result-text{font-size:1.1rem;margin:15px 0;text-align:center;font-weight:700;color:var(--tg-theme-text-color, #000)}.wrong-answers-section{margin:20px 0;padding:15px;background-color:var(--tg-theme-secondary-bg-color, #f8f8f8);border-radius:10px}.wrong-answer-item{margin-bottom:15px}.wrong-answer-item p{margin:5px 0;font-size:.9rem}.explanation{font-style:italic;color:var(--tg-theme-hint-color, #666);margin-top:8px}.divider{border:none;border-top:1px solid #ddd;margin:10px 0}.modal-btn{padding:12px 20px;margin:0 10px;border-radius:8px;font-weight:500;cursor:pointer;transition:all .2s}.modal-btn{background-color:var(--tg-theme-button-color, #4CAF50);color:var(--tg-theme-button-text-color, white)}.modal-btn.secondary{background-color:var(--tg-theme-secondary-bg-color, #f0f0f0);color:var(--tg-theme-text-color, #000)}.modal-btn:hover{opacity:.9;transform:translateY(-2px)}.header-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:10px}.back-btn{background:none;border:none;color:var(--tg-theme-link-color, #3366cc);font-size:1rem;cursor:pointer;padding:8px 12px}.header-spacer{width:40px}.topics-container{padding:20px;max-width:800px;margin:0 auto}.loading{text-align:center;padding:40px;font-size:18px}.topics-list{display:grid;grid-template-columns:1fr;gap:15px;margin-top:20px}.topic-card{padding:20px;background-color:#f8f8f8;border-radius:10px;text-decoration:none;color:#333;transition:all .3s}.topic-card:hover{transform:translateY(-3px);box-shadow:0 4px 8px #0000001a;background-color:#e8f5e9}.topic-card h3{margin-bottom:10px;color:#2196f3}.topic-card p{color:#666;font-size:14px}body{font-family:Arial,sans-serif;margin:0;padding:0;background-color:#f4f4f9;color:#333;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-webkit-user-drag:none}.app-container{max-width:100%;min-height:100vh;margin:0 auto;padding:16px;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--tg-theme-bg-color, #ffffff);color:var(--tg-theme-text-color, #000000)}h1,h2,h3,h4{color:var(--tg-theme-text-color, #000000);margin-top:0}h2{font-size:1.5rem;margin-bottom:1.5rem;text-align:center}button{border-radius:10px;border:none;padding:12px 20px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;background-color:var(--tg-theme-button-color, #4CAF50);color:var(--tg-theme-button-text-color, #d88585);width:100%;margin:8px 0;box-shadow:0 2px 4px #0000001a}button:hover{transform:translateY(-2px);box-shadow:0 4px 8px #00000026}button:disabled{background-color:#ccc;cursor:not-allowed;transform:none;box-shadow:none}.primary-btn{background-color:var(--tg-theme-button-color, #4CAF50)}.secondary-btn{background-color:var(--tg-theme-secondary-bg-color, #f0f0f0);color:var(--tg-theme-text-color, #000000)}.danger-btn{background-color:#f44336}.correct{background-color:#4caf50!important;color:#fff!important}.wrong{background-color:#f44336!important;color:#fff!important}.card{background-color:var(--tg-theme-secondary-bg-color, #f8f8f8);border-radius:12px;padding:16px;margin-bottom:16px;box-shadow:0 2px 4px #0000000d}.nav-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:20px 0}input,select,textarea{width:100%;padding:12px;margin:8px 0;border:1px solid #ddd;border-radius:8px;font-size:1rem;background-color:var(--tg-theme-secondary-bg-color, #f8f8f8);color:var(--tg-theme-text-color, #000000)}.loading{display:flex;justify-content:center;align-items:center;height:200px;font-size:1.2rem;color:var(--tg-theme-hint-color, #888888)}.img-responsive{max-width:100%;height:auto;border-radius:8px;margin:10px 0}@media (max-width: 600px){.app-container{padding:12px}button{padding:10px 16px;font-size:.9rem}h2{font-size:1.3rem}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in{animation:fadeIn .3s ease-in}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--tg-theme-secondary-bg-color, #f1f1f1)}::-webkit-scrollbar-thumb{background:var(--tg-theme-button-color, #888);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--tg-theme-button-color, #555)}.tg-header{background-color:var(--tg-theme-bg-color);padding:12px 16px;position:sticky;top:0;z-index:100}.timer{background-color:var(--tg-theme-button-color, #4CAF50);color:#fff;padding:8px 12px;border-radius:20px;display:inline-block;font-weight:700;margin-bottom:15px}