.App{overflow:hidden}.app-header{color:#1565c0;padding:30px;text-align:center}.app-header h1{font-size:2.5rem;margin-bottom:10px}.app-header p{font-size:1.1rem;opacity:.9}main{padding:40px}.quiz-container{max-width:600px;margin:0 auto}.progress{margin-bottom:30px}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.progress-text{color:#666;font-size:.9rem}.score-small{color:#666;font-size:.8rem;font-weight:500}.progress-bar{height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#90caf9,#64b5f6);transition:width .3s ease}.question-card{padding:30px}.question{color:#333;font-size:1.3rem;margin-bottom:25px;line-height:1.5}.answer-input{width:100%;padding:15px;font-size:1.1rem;border:2px solid #e0e0e0;border-radius:10px;margin-bottom:20px;transition:border-color .3s}.answer-input:focus{outline:none;border-color:#90caf9}.answer-input:disabled{background:#f5f5f5;cursor:not-allowed}.button-group{display:flex;gap:10px}.submit-btn,.hint-btn,.next-btn,.restart-btn{padding:12px 30px;font-size:1rem;border:none;border-radius:8px;cursor:pointer;transition:all .3s;font-weight:600}.submit-btn{background:linear-gradient(135deg,#90caf9,#64b5f6);color:#0d47a1;flex:1}.submit-btn:hover{transform:translateY(-2px);box-shadow:0 5px 15px #90caf94d}.hint-btn{background:#ffc107;color:#333}.hint-btn:hover{background:#ffb300}.hint{margin-top:15px;padding:15px;background:#fff3cd;border-left:4px solid #ffc107;border-radius:5px;color:#856404}.result{margin-top:20px;padding:20px;border-radius:10px;text-align:center}.result.correct{background:#d4edda;color:#155724;border:2px solid #c3e6cb}.result.incorrect{background:#f8d7da;color:#721c24;border:2px solid #f5c6cb}.result p{margin-bottom:10px;font-size:1.1rem}.result strong{color:#333;background:#fff;padding:2px 8px;border-radius:4px}.next-btn{background:#28a745;color:#fff;margin-top:15px}.next-btn:hover{background:#218838}.quiz-complete{text-align:center;padding:40px}.quiz-complete h2{color:#764ba2;font-size:2.5rem;margin-bottom:30px}.final-score{font-size:2rem;color:#333;margin-bottom:15px}.percentage{font-size:1.5rem;color:#666;margin-bottom:30px}.restart-btn{background:linear-gradient(135deg,#90caf9,#64b5f6);color:#0d47a1;padding:15px 40px;font-size:1.1rem}.restart-btn:hover{transform:translateY(-2px);box-shadow:0 5px 15px #90caf94d}.global-menu{position:fixed;top:20px;right:20px;z-index:1000}.hamburger-menu-global{background:none;border:none;cursor:pointer;display:flex;flex-direction:column;gap:4px;padding:12px;transition:all .3s}.hamburger-menu-global span{display:block;height:3px;width:25px;background:#64b5f6;border-radius:2px;transition:all .3s}.menu-dropdown-global{position:absolute;top:100%;right:0;background:#fff;border-radius:10px;box-shadow:0 4px 20px #00000026;padding:20px;min-width:200px;z-index:1000;border:1px solid #e0e0e0;margin-top:8px}.menu-item{margin-bottom:15px}.menu-item:last-child{margin-bottom:0}.menu-item span{display:block;color:#666;font-size:.9rem;margin-bottom:10px;font-weight:600}.mode-buttons{display:flex;gap:8px}.mode-btn-small{padding:8px 16px;font-size:.9rem;border:2px solid #90caf9;background:#fff;color:#1976d2;border-radius:6px;cursor:pointer;transition:all .3s;font-weight:600;flex:1}.mode-btn-small:hover{background:#f8fcff}.mode-btn-small.active{background:linear-gradient(135deg,#90caf9,#64b5f6);color:#0d47a1}.mode-btn-small:disabled{opacity:.5;cursor:not-allowed}.multiple-choice-options{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.option-btn{padding:15px;font-size:1.05rem;border:2px solid #e0e0e0;background:#fff;border-radius:10px;cursor:pointer;transition:all .3s;text-align:left}.option-btn:hover:not(:disabled){background:#f8fcff;border-color:#90caf9}.option-btn.selected{background:#f0f8ff;border-color:#90caf9;font-weight:600}.option-btn.correct{background:#d4edda;border-color:#28a745;color:#155724}.option-btn.incorrect{background:#f8d7da;border-color:#dc3545;color:#721c24}.option-btn:disabled{cursor:not-allowed}.result-message-container{height:60px;display:flex;align-items:center;justify-content:center;margin-top:20px}.result-message{text-align:center;font-size:1.2rem;font-weight:700;padding:15px;border-radius:10px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 600px){.app-header h1{font-size:2rem}.question{font-size:1.1rem}main{padding:20px}.global-menu{top:15px;right:15px}.menu-dropdown-global{min-width:180px;right:-10px}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background:linear-gradient(135deg,#f8fafc,#e2e8f0);min-height:100vh;display:flex;justify-content:center;align-items:center}#root{width:100%;max-width:800px;padding:20px}