:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--bg-primary: #0a0a0a;--bg-secondary: #111111;--bg-card: rgba(255, 255, 255, .03);--bg-card-hover: rgba(255, 255, 255, .06);--border: rgba(255, 255, 255, .1);--border-active: rgba(255, 255, 255, .25);--text-primary: #fafafa;--text-secondary: rgba(255, 255, 255, .65);--text-muted: rgba(255, 255, 255, .4);--accent: #3b82f6;--accent-hover: #60a5fa;--accent-glow: rgba(59, 130, 246, .15);--success: #22c55e;--warning: #eab308;--danger: #ef4444;--radius: .75rem;--radius-sm: .5rem}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg-primary);color:var(--text-primary)}.app{min-height:100vh;display:flex;flex-direction:column}.header{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;border-bottom:1px solid var(--border);background:var(--bg-secondary);position:sticky;top:0;z-index:100}.header-left{display:flex;align-items:center;gap:.75rem}.logo-icon{width:36px;height:36px;border-radius:8px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:1.2rem}.app-title{font-size:1.25rem;font-weight:700;letter-spacing:-.02em}.header-right{display:flex;align-items:center;gap:1rem}.streak-badge{display:flex;align-items:center;gap:.4rem;background:#eab3081a;color:var(--warning);padding:.35rem .75rem;border-radius:999px;font-size:.8rem;font-weight:600}.xp-badge{display:flex;align-items:center;gap:.4rem;background:var(--accent-glow);color:var(--accent);padding:.35rem .75rem;border-radius:999px;font-size:.8rem;font-weight:600}.main-content{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.nav-tabs{display:flex;gap:.25rem;background:var(--bg-secondary);padding:.25rem;border-radius:var(--radius);margin-bottom:2rem;border:1px solid var(--border);overflow-x:auto}.nav-tab{padding:.6rem 1.2rem;border-radius:var(--radius-sm);border:none;background:transparent;color:var(--text-secondary);cursor:pointer;font-size:.875rem;font-weight:500;transition:all .2s;white-space:nowrap;display:flex;align-items:center;gap:.5rem}.nav-tab:hover{background:var(--bg-card-hover);color:var(--text-primary)}.nav-tab.active{background:var(--accent);color:#fff}.vehicle-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem;margin-bottom:2rem}.vehicle-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem;cursor:pointer;transition:all .25s ease;position:relative;overflow:hidden}.vehicle-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent);transform:scaleX(0);transition:transform .25s ease}.vehicle-card:hover{border-color:var(--border-active);background:var(--bg-card-hover);transform:translateY(-2px)}.vehicle-card:hover:before{transform:scaleX(1)}.vehicle-card.selected{border-color:var(--accent);box-shadow:0 0 20px var(--accent-glow)}.vehicle-card.selected:before{transform:scaleX(1)}.vehicle-icon{font-size:3rem;margin-bottom:1rem;display:block}.vehicle-name{font-size:1.15rem;font-weight:600;margin-bottom:.4rem}.vehicle-desc{font-size:.85rem;color:var(--text-secondary);margin-bottom:1rem}.vehicle-meta{display:flex;gap:1rem;font-size:.75rem;color:var(--text-muted)}.vehicle-meta span{display:flex;align-items:center;gap:.3rem}.section-title{font-size:1.35rem;font-weight:700;margin-bottom:.5rem;letter-spacing:-.02em}.section-subtitle{color:var(--text-secondary);font-size:.9rem;margin-bottom:1.5rem}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem}.lesson-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;cursor:pointer;transition:all .2s;display:flex;gap:1rem}.lesson-card:hover{border-color:var(--border-active);background:var(--bg-card-hover)}.lesson-card.locked{opacity:.5;cursor:not-allowed}.lesson-number{width:40px;height:40px;border-radius:50%;background:var(--accent-glow);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;flex-shrink:0}.lesson-number.completed{background:#22c55e26;color:var(--success)}.lesson-number.locked{background:#ffffff0d;color:var(--text-muted)}.lesson-info{flex:1;min-width:0}.lesson-title{font-weight:600;font-size:.95rem;margin-bottom:.3rem}.lesson-meta{font-size:.8rem;color:var(--text-secondary);display:flex;gap:.75rem}.lesson-progress-bar{height:3px;background:#ffffff14;border-radius:999px;margin-top:.75rem;overflow:hidden}.lesson-progress-fill{height:100%;background:var(--accent);border-radius:999px;transition:width .3s ease}.lesson-view{max-width:800px;margin:0 auto}.lesson-header{margin-bottom:2rem}.lesson-breadcrumb{font-size:.8rem;color:var(--text-muted);margin-bottom:.75rem;cursor:pointer;display:inline-flex;align-items:center;gap:.3rem}.lesson-breadcrumb:hover{color:var(--text-secondary)}.lesson-content{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:1.5rem;line-height:1.8}.lesson-content h2{font-size:1.25rem;margin-bottom:1rem;color:var(--accent)}.lesson-content h3{font-size:1.05rem;margin:1.5rem 0 .75rem}.lesson-content p{margin-bottom:1rem;color:var(--text-secondary)}.lesson-content ul{padding-left:1.5rem;margin-bottom:1rem;color:var(--text-secondary)}.lesson-content li{margin-bottom:.4rem}.lesson-content .highlight-box{background:var(--accent-glow);border-left:3px solid var(--accent);padding:1rem 1.25rem;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:1rem 0}.lesson-content .warning-box{background:#eab30814;border-left:3px solid var(--warning);padding:1rem 1.25rem;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:1rem 0;color:var(--warning)}.quiz-container{max-width:700px;margin:0 auto}.quiz-progress{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.quiz-progress-bar{flex:1;height:6px;background:#ffffff14;border-radius:999px;overflow:hidden}.quiz-progress-fill{height:100%;background:var(--accent);border-radius:999px;transition:width .3s ease}.quiz-progress-text{font-size:.85rem;color:var(--text-secondary);white-space:nowrap}.quiz-question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:1.5rem}.quiz-question{font-size:1.15rem;font-weight:600;margin-bottom:1.5rem;line-height:1.6}.quiz-options{display:flex;flex-direction:column;gap:.75rem}.quiz-option{background:#ffffff08;border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem 1.25rem;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:.75rem;font-size:.95rem;color:var(--text-primary);text-align:left;width:100%}.quiz-option:hover:not(.selected):not(.correct):not(.wrong){border-color:var(--border-active);background:var(--bg-card-hover)}.quiz-option.selected{border-color:var(--accent);background:var(--accent-glow)}.quiz-option.correct{border-color:var(--success);background:#22c55e1a;color:var(--success)}.quiz-option.wrong{border-color:var(--danger);background:#ef44441a;color:var(--danger)}.option-letter{width:28px;height:28px;border-radius:50%;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600;flex-shrink:0}.quiz-option.selected .option-letter{background:var(--accent);border-color:var(--accent);color:#fff}.quiz-option.correct .option-letter{background:var(--success);border-color:var(--success);color:#fff}.quiz-option.wrong .option-letter{background:var(--danger);border-color:var(--danger);color:#fff}.quiz-explanation{margin-top:1.25rem;padding:1rem 1.25rem;background:#ffffff08;border-radius:var(--radius-sm);font-size:.9rem;color:var(--text-secondary);line-height:1.6}.btn{padding:.7rem 1.5rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:transparent;color:var(--text-primary);cursor:pointer;font-size:.9rem;font-weight:500;transition:all .2s;display:inline-flex;align-items:center;gap:.5rem}.btn:hover{border-color:var(--border-active);background:var(--bg-card-hover)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn-success{background:var(--success);border-color:var(--success);color:#fff}.btn-lg{padding:.85rem 2rem;font-size:1rem}.btn:disabled{opacity:.4;cursor:not-allowed}.signs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem;margin-top:1rem}.sign-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center;transition:all .2s}.sign-card:hover{border-color:var(--border-active);transform:translateY(-2px)}.sign-visual{font-size:3rem;margin-bottom:.75rem;display:block;line-height:1}.sign-name{font-weight:600;font-size:.85rem;margin-bottom:.3rem}.sign-meaning{font-size:.75rem;color:var(--text-secondary)}.dashboard{background:linear-gradient(180deg,#1a1a2e,#0f0f23);border-radius:var(--radius);border:1px solid var(--border);padding:2rem;margin-bottom:1.5rem}.dashboard-header{text-align:center;margin-bottom:1.5rem}.windshield{height:200px;background:linear-gradient(180deg,#1a2332,#2a3a4a 40%,#3a4a5a);border-radius:var(--radius) var(--radius) 50% 50%;margin-bottom:1.5rem;position:relative;overflow:hidden;border:2px solid rgba(255,255,255,.05)}.road-line{position:absolute;bottom:20px;left:50%;transform:translate(-50%);width:4px;height:60px;background:#ffffff4d;border-radius:2px}.road-line:before,.road-line:after{content:"";position:absolute;width:4px;height:40px;background:#ffffff26;border-radius:2px;left:-30px}.road-line:after{left:30px}.instruments{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap}.gauge{text-align:center}.gauge-circle{width:90px;height:90px;border-radius:50%;border:3px solid rgba(255,255,255,.1);display:flex;flex-direction:column;align-items:center;justify-content:center;margin-bottom:.5rem;position:relative}.gauge-circle:before{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:50%;border:3px solid transparent;border-top-color:var(--accent);transform:rotate(var(--gauge-rotation, 0deg))}.gauge-value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.gauge-unit{font-size:.65rem;color:var(--text-muted);text-transform:uppercase}.gauge-label{font-size:.75rem;color:var(--text-secondary)}.controls-panel{display:flex;justify-content:center;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}.control-btn{padding:.75rem 1.5rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:#ffffff0d;color:var(--text-primary);cursor:pointer;font-size:.85rem;font-weight:500;transition:all .15s;display:flex;align-items:center;gap:.5rem}.control-btn:hover{background:#ffffff1a;border-color:var(--border-active)}.control-btn.active{background:var(--accent);border-color:var(--accent)}.control-btn.danger{border-color:#ef44444d}.control-btn.danger:hover{background:#ef444426;border-color:var(--danger)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center}.stat-value{font-size:2rem;font-weight:700;color:var(--accent);margin-bottom:.25rem}.stat-label{font-size:.8rem;color:var(--text-secondary)}.achievements-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.achievement-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;display:flex;gap:1rem;align-items:center}.achievement-card.locked{opacity:.4}.achievement-icon{font-size:2rem;flex-shrink:0}.achievement-info{flex:1}.achievement-name{font-weight:600;font-size:.9rem;margin-bottom:.2rem}.achievement-desc{font-size:.75rem;color:var(--text-secondary)}.score-card{text-align:center;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:3rem 2rem;max-width:500px;margin:0 auto}.score-circle{width:120px;height:120px;border-radius:50%;border:4px solid var(--accent);display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 1.5rem}.score-circle.excellent{border-color:var(--success)}.score-circle.good{border-color:var(--accent)}.score-circle.needs-work{border-color:var(--warning)}.score-value{font-size:2.5rem;font-weight:700}.score-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase}.score-title{font-size:1.35rem;font-weight:700;margin-bottom:.5rem}.score-message{color:var(--text-secondary);margin-bottom:1.5rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease forwards}@media(max-width:768px){.header{padding:.75rem 1rem}.main-content{padding:1rem}.nav-tabs{overflow-x:auto}.vehicle-grid,.lesson-grid{grid-template-columns:1fr}.instruments{gap:1rem}.controls-panel{flex-direction:column;align-items:center}}