:root{--color-calm-blue: #B8D4E8;--color-calm-green: #C8E6C9;--color-calm-lavender: #E1D5E7;--color-calm-peach: #FFDAB9;--color-calm-cream: #FFF8E7;--color-calm-mint: #C5E8D5;--color-text-primary: #2D3748;--color-text-secondary: #4A5568;--color-text-muted: #718096;--color-bg-main: #F7FAFC;--color-bg-card: #FFFFFF;--color-bg-highlight: #EDF2F7;--color-accent-success: #68D391;--color-accent-warning: #F6E05E;--color-accent-info: #63B3ED;--color-accent-error: #FC8181;--color-traffic-red: #E57373;--color-traffic-yellow: #FFD54F;--color-traffic-green: #81C784;--spacing-xs: .5rem;--spacing-sm: .75rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--shadow-soft: 0 2px 8px rgba(0, 0, 0, .08);--shadow-medium: 0 4px 12px rgba(0, 0, 0, .1);--transition-gentle: .4s ease;--transition-slow: .6s ease;font-family:Nunito,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.reduce-animations *,.reduce-animations *:before,.reduce-animations *:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.2s!important}.font-size-normal{font-size:16px}.font-size-large{font-size:18px}.font-size-larger{font-size:20px}body{margin:0;min-width:320px;min-height:100vh;background-color:var(--color-bg-main);color:var(--color-text-primary)}.header{background:linear-gradient(135deg,var(--color-calm-lavender) 0%,var(--color-calm-blue) 100%);padding:var(--spacing-lg) var(--spacing-xl);box-shadow:var(--shadow-soft);position:sticky;top:0;z-index:100}.header.animated{animation:slideDown .8s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.header-content{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md)}.logo-link{text-decoration:none;text-align:center}.title{color:var(--color-text-primary);font-size:1.8rem;font-weight:700;margin:0;letter-spacing:.5px}.subtitle{color:var(--color-text-secondary);font-size:1.1rem;margin-top:var(--spacing-xs);font-weight:400}.nav{display:flex;gap:var(--spacing-md);flex-wrap:wrap;justify-content:center}.nav-link{text-decoration:none;color:var(--color-text-primary);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-lg);font-size:1.1rem;font-weight:600;background:#fff9;transition:all var(--transition-gentle);border:2px solid transparent}.nav-link:hover{background:#ffffffe6;transform:translateY(-2px);box-shadow:var(--shadow-soft)}.nav-link.active{background:var(--color-bg-card);border-color:var(--color-calm-green);box-shadow:var(--shadow-medium)}.menu-toggle{display:none;background:#fffc;border:none;font-size:1.5rem;cursor:pointer;padding:var(--spacing-sm);border-radius:var(--radius-md);transition:all var(--transition-gentle)}.menu-toggle:hover{background:#fff}.student-info{margin-top:var(--spacing-sm)}.badge{background:#fffc;color:var(--color-text-secondary);padding:var(--spacing-xs) var(--spacing-md);border-radius:var(--radius-xl);font-size:.9rem;font-weight:600}@media(max-width:768px){.header{padding:var(--spacing-md)}.title{font-size:1.4rem}.nav{flex-direction:column;align-items:center;gap:var(--spacing-sm)}.nav.open{display:flex}.menu-toggle{display:block}}@media(max-width:480px){.title{font-size:1.2rem}.nav-link{padding:var(--spacing-sm) var(--spacing-md);font-size:1rem}}.footer{background:linear-gradient(135deg,var(--color-calm-blue) 0%,var(--color-calm-lavender) 100%);padding:var(--spacing-lg) var(--spacing-xl);margin-top:auto}.footer-content{max-width:1200px;margin:0 auto;text-align:center}.footer-message{display:flex;align-items:center;justify-content:center;gap:var(--spacing-md);margin-bottom:var(--spacing-sm)}.footer-emoji{font-size:1.5rem}.footer-message p{color:var(--color-text-primary);font-size:1.1rem;font-weight:600}.project-info{color:var(--color-text-secondary);font-size:.9rem}.project-info strong{color:var(--color-text-primary)}.safety-rule-card{background:var(--color-bg-card);border-radius:var(--radius-lg);padding:var(--spacing-lg);text-align:center;border:2px solid;transition:all var(--transition-gentle);box-shadow:var(--shadow-soft)}.safety-rule-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-medium)}.rule-icon{width:70px;height:70px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto var(--spacing-md);font-size:2rem;box-shadow:var(--shadow-soft)}.rule-title{font-size:1.2rem;font-weight:700;margin-bottom:var(--spacing-sm)}.rule-description{color:var(--color-text-secondary);font-size:1rem;line-height:1.6}.safety-rules-section{padding:var(--spacing-lg) 0}.section-title{text-align:center;color:var(--color-text-primary);font-size:1.6rem;font-weight:700;margin-bottom:var(--spacing-xl)}.rules-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg);max-width:1000px;margin:0 auto}@media(max-width:600px){.rules-grid{grid-template-columns:1fr;gap:var(--spacing-md)}.section-title{font-size:1.3rem}}.home-page{padding:var(--spacing-lg) 0}.welcome-section{text-align:center;padding:var(--spacing-xl);margin-bottom:var(--spacing-lg);background:var(--color-bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-soft);max-width:800px;margin-left:auto;margin-right:auto}.welcome-title{color:var(--color-text-primary);font-size:1.8rem;font-weight:700;margin-bottom:var(--spacing-md)}.welcome-text{color:var(--color-text-secondary);font-size:1.2rem;line-height:1.6}@media(max-width:600px){.welcome-section{padding:var(--spacing-lg);margin:0 var(--spacing-md) var(--spacing-lg)}.welcome-title{font-size:1.4rem}.welcome-text{font-size:1rem}}.traffic-section{padding:var(--spacing-xl);text-align:center}.traffic-title{color:var(--color-text-primary);font-size:1.6rem;font-weight:700;margin-bottom:var(--spacing-xl)}.traffic-container{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xl);max-width:400px;margin:0 auto;background:var(--color-bg-card);padding:var(--spacing-xl);border-radius:var(--radius-xl);box-shadow:var(--shadow-medium)}.traffic-light-box{background:linear-gradient(180deg,#4a5568,#2d3748);padding:var(--spacing-lg);border-radius:var(--radius-lg);display:flex;flex-direction:column;gap:var(--spacing-md);box-shadow:var(--shadow-medium)}.light{width:70px;height:70px;border-radius:50%;transition:all .6s ease;opacity:.3}.light.red{background:var(--color-traffic-red)}.light.yellow{background:var(--color-traffic-yellow)}.light.green{background:var(--color-traffic-green)}.light.active{opacity:1;box-shadow:0 0 30px currentColor}.light.active.red{box-shadow:0 0 30px var(--color-traffic-red)}.light.active.yellow{box-shadow:0 0 30px var(--color-traffic-yellow)}.light.active.green{box-shadow:0 0 30px var(--color-traffic-green)}.light-message{text-align:center;padding:var(--spacing-md)}.emoji{font-size:3rem;display:block;margin-bottom:var(--spacing-sm)}.message{font-size:1.8rem;font-weight:700;margin-bottom:var(--spacing-sm);transition:color .4s ease}.message.red{color:var(--color-traffic-red)}.message.yellow{color:#d4a500}.message.green{color:#43a047}.light-description{color:var(--color-text-secondary);font-size:1.1rem;line-height:1.6}@media(max-width:480px){.traffic-container{padding:var(--spacing-lg)}.light{width:60px;height:60px}.message{font-size:1.5rem}}.feedback-form-container{background:linear-gradient(135deg,var(--color-calm-lavender) 0%,var(--color-calm-blue) 100%);border-radius:var(--radius-xl);padding:var(--spacing-xl);margin:var(--spacing-lg) auto;max-width:500px;box-shadow:var(--shadow-medium)}.form-title{color:var(--color-text-primary);font-size:1.5rem;text-align:center;margin-bottom:var(--spacing-xs);font-weight:700}.form-subtitle{color:var(--color-text-secondary);text-align:center;margin-bottom:var(--spacing-lg)}.feedback-form{display:flex;flex-direction:column;gap:var(--spacing-md)}.form-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.form-group label{color:var(--color-text-primary);font-weight:600;font-size:1.05rem}.form-group input,.form-group select,.form-group textarea{padding:12px 15px;border:2px solid transparent;border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all var(--transition-gentle);background:#fffffff2}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--color-calm-green);box-shadow:0 0 8px #c8e6c980;background:#fff}.form-group input.error,.form-group textarea.error{border-color:var(--color-accent-error);background:#fff5f5}.error-text{color:#c53030;font-size:.85rem;font-weight:500}.form-group textarea{resize:vertical;min-height:100px}.form-buttons{display:flex;gap:var(--spacing-md);margin-top:var(--spacing-md)}.submit-btn,.reset-btn{flex:1;padding:12px 20px;border:none;border-radius:var(--radius-md);font-size:1.05rem;font-weight:600;cursor:pointer;transition:all var(--transition-gentle)}.submit-btn{background:linear-gradient(135deg,var(--color-accent-success),#48BB78);color:#fff}.submit-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-medium)}.reset-btn{background:#ffffff4d;color:var(--color-text-primary);border:2px solid rgba(255,255,255,.5)}.reset-btn:hover{background:#ffffff80}.success-message{text-align:center;padding:var(--spacing-xl);color:var(--color-text-primary)}.success-emoji{font-size:4rem;display:block;margin-bottom:var(--spacing-md)}.success-message h3{font-size:1.6rem;margin-bottom:var(--spacing-sm);font-weight:700}.success-message p{font-size:1.1rem;color:var(--color-text-secondary)}@media(max-width:600px){.feedback-form-container{margin:var(--spacing-md);padding:var(--spacing-lg)}.form-buttons{flex-direction:column}}.learn-page{padding:var(--spacing-lg);max-width:900px;margin:0 auto}.learn-page.fade-in{animation:fadeIn .6s ease-out}.page-title{text-align:center;color:var(--color-text-primary);font-size:1.8rem;font-weight:700;margin-bottom:var(--spacing-xl)}.tabs{display:flex;justify-content:center;gap:var(--spacing-md);margin-bottom:var(--spacing-xl);flex-wrap:wrap}.tab-btn{padding:var(--spacing-md) var(--spacing-lg);border:2px solid var(--color-calm-blue);border-radius:var(--radius-lg);background:var(--color-bg-card);color:var(--color-text-primary);font-size:1.1rem;font-weight:600;cursor:pointer;transition:all var(--transition-gentle)}.tab-btn:hover{background:var(--color-calm-blue);transform:translateY(-2px)}.tab-btn.active{background:var(--color-calm-green);border-color:var(--color-calm-green);box-shadow:var(--shadow-soft)}.tab-content{background:var(--color-bg-card);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:var(--shadow-soft)}.tips-section h3{color:var(--color-text-primary);font-size:1.4rem;margin-bottom:var(--spacing-lg);text-align:center}.loading{text-align:center;color:var(--color-text-muted);font-size:1.1rem;padding:var(--spacing-xl)}.loader{display:inline-block;margin-right:var(--spacing-sm);animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error{text-align:center;color:var(--color-accent-error);padding:var(--spacing-md)}.tips-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--spacing-md)}.tip-item{padding:var(--spacing-md);border-radius:var(--radius-md);background:var(--color-bg-highlight);border-left:4px solid var(--color-calm-green);font-size:1.05rem;line-height:1.6}.tip-badge{display:inline-block;background:var(--color-calm-lavender);color:var(--color-text-secondary);padding:2px 8px;border-radius:var(--radius-sm);font-size:.8rem;margin-right:var(--spacing-sm);font-weight:600}@media(max-width:600px){.learn-page{padding:var(--spacing-md)}.page-title{font-size:1.4rem}.tabs{flex-direction:column;align-items:center}.tab-btn{width:100%;max-width:250px;text-align:center}.tab-content{padding:var(--spacing-lg)}}.quiz-page{padding:var(--spacing-lg);max-width:800px;margin:0 auto}.quiz-page-title{text-align:center;color:var(--color-text-primary);font-size:1.8rem;font-weight:700;margin-bottom:var(--spacing-xl)}.scoreboard{display:flex;justify-content:center;gap:var(--spacing-xl);margin-bottom:var(--spacing-xl);flex-wrap:wrap}.score-item{background:var(--color-bg-card);padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-soft);min-width:150px}.score-item.stars{background:linear-gradient(135deg,#fff8e1,#ffecb3)}.score-label{display:block;color:var(--color-text-muted);font-size:.9rem;margin-bottom:var(--spacing-xs)}.score-value{display:block;color:var(--color-text-primary);font-size:1.8rem;font-weight:700}.levels-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.level-card{background:var(--color-bg-card);border:3px solid;border-radius:var(--radius-xl);padding:var(--spacing-xl);text-align:center;cursor:pointer;transition:all var(--transition-gentle);box-shadow:var(--shadow-soft);position:relative;overflow:hidden}.level-card:hover:not(.locked){transform:translateY(-5px);box-shadow:var(--shadow-medium)}.level-card.locked{opacity:.6;cursor:not-allowed;background:var(--color-bg-highlight)}.level-card.completed{background:linear-gradient(135deg,#c8e6c94d,#b8d4e84d)}.level-emoji{font-size:3rem;margin-bottom:var(--spacing-sm)}.level-name{color:var(--color-text-primary);font-size:1.4rem;font-weight:700;margin-bottom:var(--spacing-xs)}.level-description{color:var(--color-text-secondary);font-size:1rem;margin-bottom:var(--spacing-md)}.lock-icon{font-size:2rem;position:absolute;top:10px;right:10px}.stars-earned{font-size:1.5rem;margin-top:var(--spacing-sm)}.play-text{display:block;color:var(--color-accent-success);font-weight:600;margin-top:var(--spacing-sm)}.level-hint{text-align:center;color:var(--color-text-muted);font-size:1rem;font-style:italic}.level-header{display:flex;align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.back-arrow{background:var(--color-bg-card);border:2px solid var(--color-calm-blue);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-gentle);color:var(--color-text-primary)}.back-arrow:hover{background:var(--color-calm-blue)}.current-level-title{color:var(--color-text-primary);font-size:1.5rem;font-weight:700;flex:1;text-align:center;margin-right:80px}.quiz-container{background:var(--color-bg-card);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:var(--shadow-medium)}.progress-bar{height:12px;background:var(--color-bg-highlight);border-radius:var(--radius-md);overflow:hidden;margin-bottom:var(--spacing-lg)}.progress{height:100%;background:linear-gradient(90deg,var(--color-calm-green),var(--color-calm-blue));border-radius:var(--radius-md);transition:width .6s ease}.question-counter{text-align:center;color:var(--color-text-muted);font-size:1rem;margin-bottom:var(--spacing-md)}.question{text-align:center;color:var(--color-text-primary);font-size:1.3rem;font-weight:600;margin-bottom:var(--spacing-xl);line-height:1.5}.options{display:flex;flex-direction:column;gap:var(--spacing-md)}.option-btn{padding:var(--spacing-md) var(--spacing-lg);border:2px solid var(--color-calm-blue);border-radius:var(--radius-lg);background:var(--color-bg-card);color:var(--color-text-primary);font-size:1.1rem;font-weight:500;cursor:pointer;transition:all var(--transition-gentle);text-align:left}.option-btn:hover:not(:disabled){background:var(--color-calm-blue);transform:translate(4px)}.option-btn:disabled{cursor:default}.option-btn.correct{background:var(--color-accent-success);border-color:var(--color-accent-success);color:#fff}.option-btn.wrong{background:var(--color-accent-error);border-color:var(--color-accent-error);color:#fff}.feedback{margin-top:var(--spacing-lg);padding:var(--spacing-md);border-radius:var(--radius-md);text-align:center;font-size:1.2rem;font-weight:600}.feedback.correct{background:#68d39133;color:#276749}.feedback.wrong{background:#fc818133;color:#c53030}.result-container{text-align:center;padding:var(--spacing-xl);background:var(--color-bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-medium)}.result-emoji{font-size:5rem;margin-bottom:var(--spacing-md);animation:bounce .6s ease infinite alternate}@keyframes bounce{0%{transform:translateY(0)}to{transform:translateY(-10px)}}.result-title{color:var(--color-text-primary);font-size:1.8rem;font-weight:700;margin-bottom:var(--spacing-md)}.stars-display{font-size:2.5rem;margin-bottom:var(--spacing-md)}.result-score{font-size:1.2rem;color:var(--color-text-secondary);margin-bottom:var(--spacing-md)}.score{color:var(--color-accent-success);font-weight:700;font-size:1.5rem}.total{font-weight:700}.result-message{color:var(--color-text-secondary);font-size:1.1rem;margin-bottom:var(--spacing-lg)}.unlock-message{background:linear-gradient(135deg,#fff8e1,#ffecb3);color:#f57c00;padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-lg);font-size:1.2rem;font-weight:700;margin-bottom:var(--spacing-lg);animation:pulse 1s ease infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}.result-buttons{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.restart-btn,.back-btn{padding:var(--spacing-md) var(--spacing-xl);border:none;border-radius:var(--radius-lg);font-size:1.1rem;font-weight:600;cursor:pointer;transition:all var(--transition-gentle)}.restart-btn{background:linear-gradient(135deg,var(--color-calm-green),var(--color-calm-blue));color:var(--color-text-primary)}.back-btn{background:var(--color-bg-highlight);color:var(--color-text-primary);border:2px solid var(--color-calm-blue)}.restart-btn:hover,.back-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-medium)}@media(max-width:600px){.quiz-page{padding:var(--spacing-md)}.quiz-page-title{font-size:1.4rem}.levels-container{grid-template-columns:1fr}.level-card{padding:var(--spacing-lg)}.result-buttons{flex-direction:column}.restart-btn,.back-btn{width:100%}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Nunito,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(180deg,var(--color-calm-cream) 0%,var(--color-calm-mint) 50%,var(--color-calm-blue) 100%);min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding:var(--spacing-lg);max-width:1200px;margin:0 auto;width:100%}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.main-content>*{animation:fadeIn .8s ease-out forwards}.main-content>*:nth-child(2){animation-delay:.3s}.main-content>*:nth-child(3){animation-delay:.5s}@media(max-width:768px){.main-content{padding:var(--spacing-md)}}.app:before{content:"";position:fixed;inset:0;background-image:radial-gradient(circle at 10% 20%,rgba(184,212,232,.2) 0%,transparent 25%),radial-gradient(circle at 90% 30%,rgba(200,230,201,.2) 0%,transparent 25%),radial-gradient(circle at 50% 80%,rgba(225,213,231,.2) 0%,transparent 25%);pointer-events:none;z-index:-1}*:focus-visible{outline:3px solid var(--color-calm-blue);outline-offset:2px}.skip-link{position:absolute;top:-40px;left:0;background:var(--color-text-primary);color:#fff;padding:var(--spacing-sm) var(--spacing-md);z-index:100;transition:top var(--transition-gentle)}.skip-link:focus{top:0}