:root {
  --electric-blue: #0066FF; --neon-green: #00FF66; --coral-pink: #FF4466;
  --sunny-yellow: #FFD700; --royal-purple: #7C3AED; --cyber-cyan: #00D4FF; --neon-orange: #FF6B00;
  --bg-primary: #F5F5FF; --bg-secondary: #FFFFFF; --bg-card: #FFFFFF;
  --text-primary: #1A1A2E; --text-secondary: #4A4A6A; --text-muted: #8888AA;
  --border-color: #1A1A2E; --shadow-color: rgba(26,26,46,0.2);
  --glass-bg: rgba(255,255,255,0.15); --glass-border: rgba(255,255,255,0.3);
  --border-width: 3px; --shadow-offset: 6px;
  --border-radius-sm: 8px; --border-radius-md: 16px; --border-radius-lg: 24px; --border-radius-xl: 32px;
  --font-primary: 'Prompt', sans-serif;
  --transition-fast: 0.2s ease; --transition-normal: 0.3s ease; --transition-slow: 0.5s ease;
  --nav-height: 64px; --container-max: 1200px;
}
[data-theme="dark"] {
  --bg-primary: #0A0A1A; --bg-secondary: #12122A; --bg-card: #1A1A3E;
  --text-primary: #E8E8FF; --text-secondary: #AAAAEE; --text-muted: #6666AA;
  --border-color: #E8E8FF; --shadow-color: rgba(0,0,0,0.4);
  --glass-bg: rgba(10,10,30,0.6); --glass-border: rgba(255,255,255,0.1);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-primary);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
.container{max-width:var(--container-max);margin:0 auto;padding:0 20px;position:relative;z-index:2}
a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;height:auto}button{cursor:pointer;font-family:inherit;border:none;background:none}input,textarea,select{font-family:inherit}
.text-center{text-align:center}
.loading-screen{position:fixed;inset:0;background:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:9999;transition:opacity .6s,visibility .6s}
.loading-screen.hidden{opacity:0;visibility:hidden;pointer-events:none}
.loader-container{text-align:center}
.loading-text{font-size:1.2rem;font-weight:600;color:var(--electric-blue);margin-top:1rem;animation:pulse 1.5s infinite}
.loading-bar{width:280px;height:12px;background:var(--bg-secondary);border:var(--border-width) solid var(--border-color);border-radius:50px;margin:1rem auto;overflow:hidden}
.loading-bar-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--electric-blue),var(--royal-purple));border-radius:50px;transition:width .3s}
.loading-percent{font-size:1.5rem;font-weight:800;color:var(--royal-purple)}
.loading-ring{display:inline-block;animation:spin 3s linear infinite;filter:drop-shadow(0 0 20px rgba(0,102,255,.3))}
@keyframes spin{to{transform:rotate(360deg)}}
.page-bg-haikei-waves{position:absolute;inset:0;z-index:0;overflow:hidden;opacity:.08}
.page-bg-haikei-waves svg{width:100%;height:100%}
.page-bg-haikei-grid{position:absolute;inset:0;z-index:0;overflow:hidden;opacity:.06;background-image:linear-gradient(var(--electric-blue) 1px,transparent 1px),linear-gradient(90deg,var(--electric-blue) 1px,transparent 1px);background-size:60px 60px}
.page-bg-haikei-dots{position:absolute;inset:0;z-index:0;overflow:hidden;opacity:.07;background-image:radial-gradient(var(--royal-purple) 1.5px,transparent 1.5px);background-size:30px 30px}
.page-bg-haikei-circuit{position:absolute;inset:0;z-index:0;overflow:hidden;opacity:.05}
@keyframes drift{0%{transform:translate(0,0)}50%{transform:translate(30px,-20px)}100%{transform:translate(0,0)}}
.page-bg-haikei-circuit .circuit-line{position:absolute;background:var(--electric-blue);animation:drift 8s ease-in-out infinite}
.circuit-line:nth-child(1){width:200px;height:2px;top:20%;left:-50px;animation-delay:0s}
.circuit-line:nth-child(2){width:150px;height:2px;top:50%;left:-30px;animation-delay:2s}
.circuit-line:nth-child(3){width:180px;height:2px;top:75%;left:-60px;animation-delay:4s}
.circuit-line:nth-child(4){width:2px;height:200px;top:-50px;left:80%;animation-delay:1s}
.circuit-line:nth-child(5){width:2px;height:150px;top:-30px;left:60%;animation-delay:3s}
.circuit-line::after{content:'';position:absolute;width:8px;height:8px;background:var(--neon-green);border-radius:50%;top:-3px;right:-4px;box-shadow:0 0 12px var(--neon-green);animation:pulse 2s infinite}
.floating-nav{position:fixed;top:16px;left:296px;width:calc(100% - 312px);max-width:var(--container-max);height:var(--nav-height);background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);display:flex;align-items:center;justify-content:space-between;padding:0 20px;z-index:1000;box-shadow:0 var(--shadow-offset) 0 var(--shadow-color);transition:all var(--transition-normal)}
.nav-brand{display:flex;align-items:center;gap:8px}.nav-logo{font-size:1.5rem}.nav-title{font-weight:700;font-size:1rem;color:var(--text-primary);white-space:nowrap}
.nav-center{flex:1;max-width:200px;margin:0 16px}
.nav-progress{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:50px;height:20px;position:relative;overflow:hidden}
.nav-progress-fill{height:100%;background:linear-gradient(90deg,var(--neon-green),var(--electric-blue));border-radius:50px;transition:width .5s;width:0%}
.nav-progress-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:var(--text-primary)}
.nav-actions{display:flex;align-items:center;gap:4px}
.nav-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);background:var(--bg-card);color:var(--text-primary);transition:all var(--transition-fast)}
.nav-btn:hover{transform:translate(-2px,-2px);box-shadow:2px 2px 0 var(--border-color)}
.nav-icon{width:20px;height:20px}.menu-btn{background:var(--sunny-yellow)}
.sidebar{position:fixed;top:0;left:0;width:280px;height:100vh;background:var(--bg-primary);border-right:var(--border-width) solid var(--border-color);z-index:999;overflow-y:auto}
.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:20px;border-bottom:var(--border-width) solid var(--border-color)}
.sidebar-header h2{font-size:1.1rem;font-weight:700}
.sidebar-user{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:2px solid var(--border-color)}
.sidebar-avatar{font-size:2rem}.sidebar-user-info{flex:1;display:flex;flex-direction:column}
.sidebar-username{font-weight:700;font-size:.95rem}.sidebar-level{font-size:.75rem;color:var(--text-muted)}
.xp-badge{background:linear-gradient(135deg,var(--sunny-yellow),var(--neon-orange));padding:4px 12px;border-radius:50px;font-weight:700;font-size:.8rem;color:#fff;border:2px solid var(--border-color)}
.sidebar-streak{padding:12px 20px;border-bottom:2px solid var(--border-color)}
.streak-display{display:flex;align-items:center;gap:6px;font-weight:600;font-size:.9rem}
.sidebar-menu{padding:8px}
.sidebar-item{display:block;width:100%;padding:12px 16px;text-align:left;font-size:.9rem;font-weight:500;border-radius:var(--border-radius-sm);border:2px solid transparent;transition:all var(--transition-fast);color:var(--text-secondary)}
.sidebar-item:hover{background:var(--bg-card);border-color:var(--border-color);transform:translateX(4px)}
.sidebar-item.active{background:var(--electric-blue);color:#fff;border-color:var(--border-color);font-weight:700}
.main-content{padding-top:80px;min-height:100vh;margin-left:280px}
.page-section{display:none;min-height:calc(100vh - 80px);padding:40px 24px 80px;position:relative;overflow:hidden}
.page-section.active{display:block;animation:fadeInPage .5s}
@keyframes fadeInPage{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.page-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.particle-canvas{position:absolute;inset:0;width:100%;height:100%}
.page-header{text-align:center;margin-bottom:40px;position:relative}
.page-number{display:inline-block;font-size:3rem;font-weight:900;color:var(--electric-blue);opacity:.15;line-height:1;margin-bottom:-10px}
.page-title{font-size:1.8rem;font-weight:800;line-height:1.3;position:relative}
.page-divider{width:80px;height:var(--border-width);background:var(--electric-blue);margin:12px auto 0;border-radius:50px}
.lottie-grid-top{display:flex;justify-content:center;gap:16px;margin-top:24px;flex-wrap:wrap}
.lottie-decor{display:flex;justify-content:center;gap:20px;margin-top:40px;flex-wrap:wrap;opacity:.6}
.lottie-inline{display:flex;justify-content:center;margin-bottom:20px}
.welcome-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;min-height:calc(100vh - 200px)}
.welcome-content{display:flex;flex-direction:column;gap:24px}
.badge-subject{display:inline-block;background:var(--royal-purple);color:#fff;padding:6px 16px;border-radius:50px;font-size:.85rem;font-weight:600;border:2px solid var(--border-color);width:fit-content}
.welcome-title{line-height:1.2}
.title-line{display:block;font-size:2.8rem;font-weight:900}
.gradient-text{background:linear-gradient(135deg,var(--electric-blue),var(--royal-purple),var(--coral-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.welcome-desc{font-size:1.05rem;color:var(--text-secondary);line-height:1.7}
.learning-objectives{background:var(--glass-bg);backdrop-filter:blur(8px);border:2px solid var(--border-color);border-radius:var(--border-radius-md);padding:20px}
.learning-objectives h3{font-size:1rem;font-weight:700;margin-bottom:12px}
.learning-objectives li{font-size:.9rem;color:var(--text-secondary);margin-bottom:6px;display:flex;align-items:center;gap:8px}
.welcome-stats{display:flex;gap:12px}
.stat-card{flex:1;text-align:center;padding:16px;background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);box-shadow:3px 3px 0 var(--border-color)}
.stat-number{display:block;font-size:1.8rem;font-weight:900;color:var(--electric-blue)}
.stat-label{font-size:.8rem;color:var(--text-muted);font-weight:500}
.btn-start{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:var(--electric-blue);color:#fff;font-size:1.1rem;font-weight:700;border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);box-shadow:4px 4px 0 var(--border-color);transition:all var(--transition-fast);width:fit-content}
.btn-start:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--border-color)}
.btn-start:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--border-color)}
.btn-icon{width:20px;height:20px}
.welcome-visual{position:relative}
.lottie-wrapper{width:100%;max-width:400px;margin:0 auto}
.floating-icons{position:absolute;inset:0;pointer-events:none}
.float-icon{font-size:2rem;pointer-events:none;display:block;animation:floatUp 3s ease-in-out infinite}
@keyframes floatUp{0%,100%{transform:translateY(0)}50%{transform:translateY(-15px)}}
.scroll-indicator{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);text-align:center;animation:bounce 2s infinite}
.scroll-indicator span{display:block;font-size:.75rem;color:var(--text-muted);margin-bottom:6px}
.scroll-mouse{width:24px;height:38px;border:2px solid var(--text-muted);border-radius:12px;margin:0 auto;position:relative}
.scroll-wheel{width:4px;height:8px;background:var(--text-muted);border-radius:2px;position:absolute;top:6px;left:50%;transform:translateX(-50%);animation:scrollWheel 1.5s infinite}
@keyframes scrollWheel{0%{opacity:1;transform:translateX(-50%) translateY(0)}100%{opacity:0;transform:translateX(-50%) translateY(10px)}}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}
/* ===== 3D Welcome Scene ===== */
.welcome-3d-scene{perspective:1200px;transform-style:preserve-3d;min-height:calc(100vh - 160px);display:flex;flex-direction:column;justify-content:center}
.vanta-bg{position:absolute;inset:0;z-index:0}
.page-bg-glow{position:absolute;top:50%;left:50%;width:600px;height:600px;transform:translate(-50%,-50%);background:radial-gradient(circle,rgba(0,102,255,0.15),rgba(124,58,237,0.08),transparent 70%);border-radius:50%;filter:blur(60px);animation:glowPulse 4s ease-in-out infinite;pointer-events:none;z-index:1}
@keyframes glowPulse{0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.8}50%{transform:translate(-50%,-50%) scale(1.2);opacity:1}}
[data-depth]{transition:transform .15s ease-out;will-change:transform}
.title-deep{text-shadow:0 5px 30px rgba(0,102,255,0.3)}
.glass-tilt{background:rgba(255,255,255,0.08);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:2px solid var(--border-color);border-radius:var(--border-radius-md);padding:20px;transition:transform .3s ease,box-shadow .3s ease}
.glass-tilt:hover{transform:translateZ(20px);box-shadow:0 10px 40px rgba(0,102,255,0.2)}
.tilt-card{transition:transform .25s ease,box-shadow .25s ease;cursor:default}
.tilt-card:hover{transform:translateZ(15px) rotateX(2deg) rotateY(2deg);box-shadow:6px 6px 0 var(--border-color),0 8px 30px rgba(0,102,255,0.15)}
.glow-btn{position:relative;overflow:hidden}
.glow-btn::before{content:'';position:absolute;inset:-4px;border-radius:calc(var(--border-radius-md) + 4px);background:linear-gradient(90deg,var(--electric-blue),var(--royal-purple),var(--coral-pink),var(--sunny-yellow),var(--electric-blue));background-size:300% 100%;z-index:-1;animation:glowBorder 3s linear infinite;opacity:0;transition:opacity .3s}
.glow-btn:hover::before{opacity:1}
.glow-btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--border-color),0 0 30px rgba(0,102,255,0.3)}
@keyframes glowBorder{0%{background-position:0% 50%}100%{background-position:300% 50%}}
.float-3d{filter:drop-shadow(0 10px 40px rgba(0,102,255,0.2));animation:float3d 6s ease-in-out infinite}
@keyframes float3d{0%,100%{transform:translateY(0) rotateY(0deg)}33%{transform:translateY(-10px) rotateY(3deg)}66%{transform:translateY(5px) rotateY(-2deg)}}
.content-grid{display:grid;grid-template-columns:1fr 360px;gap:32px}
.content-full{max-width:900px;margin:0 auto}
.text-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;margin-bottom:20px;box-shadow:4px 4px 0 var(--border-color);transition:all var(--transition-normal)}
.text-card:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--border-color)}
.text-card h3{font-size:1.2rem;font-weight:700;margin-bottom:12px}
.text-card p{font-size:.95rem;color:var(--text-secondary);line-height:1.8;margin-bottom:12px}
.text-card ul{padding-left:20px}
.text-card li{font-size:.95rem;color:var(--text-secondary);margin-bottom:8px;line-height:1.6}
.text-card.with-image{display:grid;grid-template-columns:280px 1fr;gap:24px;padding:0;overflow:hidden}
.card-image-wrap{position:relative;min-height:220px;overflow:hidden}
.card-image{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.text-card.with-image:hover .card-image{transform:scale(1.05)}
.card-image-caption{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.6);color:#fff;padding:6px 12px;font-size:.7rem;text-align:center;backdrop-filter:blur(4px)}
.card-text-wrap{padding:24px 24px 24px 0}
@media(max-width:768px){.text-card.with-image{grid-template-columns:1fr}.card-text-wrap{padding:16px}.card-image-wrap{min-height:180px;max-height:220px}}
.highlight-card{border-color:var(--electric-blue);background:linear-gradient(135deg,rgba(0,102,255,0.05),rgba(124,58,237,0.05))}
.reveal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:12px}
.reveal-item{perspective:600px;height:120px;cursor:pointer;position:relative}
.reveal-front,.reveal-back{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-radius-md);backface-visibility:hidden;transition:transform .5s;padding:12px;text-align:center}
.reveal-front{z-index:2}.reveal-item:hover .reveal-front{transform:rotateY(180deg)}
.reveal-item:hover .reveal-back{transform:rotateY(0deg)}
.reveal-back{transform:rotateY(-180deg);background:var(--electric-blue);color:#fff;font-size:.8rem}
.reveal-icon{font-size:1.8rem}
.content-sidebar{display:flex;flex-direction:column;gap:20px}
.example-card,.question-card,.mini-quiz-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:20px;box-shadow:4px 4px 0 var(--border-color)}
.example-card h4,.question-card h4,.mini-quiz-card h4{font-size:1rem;font-weight:700;margin-bottom:12px}
.example-timeline{display:flex;flex-direction:column;gap:12px}
.timeline-item{display:flex;gap:12px;align-items:flex-start}
.timeline-marker{font-size:1.3rem;flex-shrink:0}
.timeline-content h5{font-weight:700;font-size:.9rem}
.timeline-content p{font-size:.8rem;color:var(--text-muted);margin-top:2px}
.think-input{width:100%;padding:10px;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);background:var(--bg-secondary);color:var(--text-primary);font-size:.85rem;resize:vertical;margin:8px 0}
.btn-save-think{padding:8px 16px;background:var(--royal-purple);color:#fff;font-weight:600;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:.85rem;transition:all var(--transition-fast)}
.btn-save-think:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.quiz-options{display:flex;flex-direction:column;gap:8px}
.qz-option{padding:10px 14px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:.85rem;font-weight:500;text-align:left;color:var(--text-primary);transition:all var(--transition-fast)}
.qz-option:hover{background:var(--electric-blue);color:#fff;transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.qz-option.correct{background:var(--neon-green);color:#000;border-color:#000}
.qz-option.wrong{background:var(--coral-pink);color:#fff;border-color:#000}
.qz-option:disabled{opacity:.6;cursor:not-allowed}
.quiz-feedback{margin-top:10px;font-weight:600;font-size:.9rem;min-height:24px}
.cycle-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0}
.cycle-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);transition:all var(--transition-normal)}
.cycle-card:hover{transform:translate(-3px,-3px);box-shadow:7px 7px 0 var(--border-color)}
.cycle-icon{font-size:2.5rem;margin-bottom:12px}
.cycle-card h3{font-size:1.1rem;font-weight:800;margin-bottom:4px}
.cycle-period{font-size:.8rem;color:var(--text-muted);margin-bottom:12px}
.cycle-card li{font-size:.85rem;color:var(--text-secondary);margin-bottom:6px}
.cycle-example{margin-top:12px;padding-top:12px;border-top:2px dashed var(--border-color);font-size:.85rem;color:var(--text-muted)}
.cycle-rd{border-top:6px solid var(--electric-blue)}
.cycle-growth{border-top:6px solid var(--neon-green)}
.cycle-decline{border-top:6px solid var(--coral-pink)}
.graph-container{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.graph-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.chart-wrapper{width:100%;max-height:350px;position:relative}
.graph-caption{text-align:center;font-size:.8rem;color:var(--text-muted);margin-top:12px}
.dnd-container{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.dnd-container h3{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.dnd-container>p{font-size:.85rem;color:var(--text-muted);margin-bottom:16px}
.dnd-techs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;min-height:50px;padding:12px;background:var(--bg-secondary);border:2px dashed var(--border-color);border-radius:var(--border-radius-sm)}
.dnd-item{padding:8px 16px;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-weight:600;font-size:.85rem;cursor:grab;transition:all var(--transition-fast);user-select:none}
.dnd-item:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.dnd-item.dragging{opacity:.5}
.dnd-zones{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.dnd-zone{background:var(--bg-secondary);border:2px dashed var(--border-color);border-radius:var(--border-radius-md);padding:12px;min-height:120px;transition:all var(--transition-fast)}
.dnd-zone.drag-over{border-color:var(--electric-blue);background:rgba(0,102,255,0.05)}
.dnd-zone h4{font-size:.9rem;font-weight:700;text-align:center;margin-bottom:8px}
.dnd-dropzone{display:flex;flex-wrap:wrap;gap:6px;min-height:60px}
.dnd-actions{display:flex;gap:8px;margin-top:16px}
.dnd-feedback{margin-top:12px;font-weight:700;font-size:.95rem}
.btn-secondary{padding:10px 20px;background:var(--bg-card);color:var(--text-primary);font-weight:600;border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-sm);box-shadow:3px 3px 0 var(--border-color);transition:all var(--transition-fast);font-size:.85rem}
.btn-secondary:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--border-color)}
.btn-secondary:active{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--border-color)}
.timeline-slider-container{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.timeline-slider-container h3{font-size:1.1rem;font-weight:700;margin-bottom:20px}
.timeline-track{display:flex;justify-content:space-between;position:relative;padding:20px 0}
.timeline-track::before{content:'';position:absolute;top:50%;left:0;right:0;height:4px;background:var(--border-color);transform:translateY(-50%);border-radius:2px}
.timeline-point{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;transition:all var(--transition-fast);padding:8px}
.timeline-point::before{content:'';width:16px;height:16px;background:var(--bg-card);border:3px solid var(--border-color);border-radius:50%;transition:all var(--transition-fast)}
.timeline-point.active::before{background:var(--electric-blue);box-shadow:0 0 0 4px rgba(0,102,255,.3)}
.timeline-point:hover::before{background:var(--royal-purple)}
.tl-year{font-size:.7rem;font-weight:700;color:var(--text-muted)}
.tl-icon{font-size:1.2rem}
.timeline-display{text-align:center;padding:16px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);margin-top:12px}
.tl-display-year{font-size:1.5rem;font-weight:900;color:var(--electric-blue)}
.tl-display-desc{font-size:.9rem;color:var(--text-secondary);margin:4px 0}
.tl-display-progress{display:flex;align-items:center;gap:8px;font-size:.75rem;color:var(--text-muted);margin-top:8px}
.tl-progress-bar{flex:1;height:6px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:3px;overflow:hidden}
.tl-progress-fill{height:100%;background:linear-gradient(90deg,var(--coral-pink),var(--sunny-yellow),var(--neon-green));border-radius:3px;transition:width .5s}
.comparison-container{margin:24px 0}
.comparison-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.compare-card{display:flex;align-items:center;gap:12px;background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:20px;box-shadow:4px 4px 0 var(--border-color)}
.compare-before,.compare-after{flex:1;text-align:center}
.compare-label{display:inline-block;font-size:.7rem;font-weight:700;padding:2px 10px;border-radius:50px;margin-bottom:8px}
.compare-before .compare-label{background:var(--coral-pink);color:#fff}
.compare-after .compare-label{background:var(--neon-green);color:#000}
.compare-card h4{font-size:.9rem;font-weight:700;margin-top:4px}
.compare-card p{font-size:.75rem;color:var(--text-muted)}
.compare-arrow{font-size:1.5rem;font-weight:900;color:var(--electric-blue)}
.prediction-game{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.prediction-game h3{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.prediction-game>p{font-size:.85rem;color:var(--text-muted);margin-bottom:16px}
.prediction-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.prediction-card{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-md);padding:16px;text-align:center}
.prediction-icon{font-size:2rem;margin-bottom:8px}
.prediction-card h4{font-size:.95rem;font-weight:700;margin-bottom:12px}
.prediction-options{display:flex;flex-direction:column;gap:6px}
.pred-btn{padding:8px;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:.8rem;font-weight:500;transition:all var(--transition-fast);color:var(--text-primary)}
.pred-btn:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.pred-btn.selected{background:var(--royal-purple);color:#fff}
.prediction-feedback{margin-top:12px;font-weight:700;min-height:24px}
.infographic-container{margin:24px 0}
.infographic-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.infographic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.info-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);cursor:pointer;transition:all var(--transition-normal)}
.info-card:hover{transform:translate(-3px,-3px);box-shadow:7px 7px 0 var(--border-color)}
.info-icon{font-size:2.5rem;margin-bottom:12px}
.info-card h4{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.info-card>p{font-size:.85rem;color:var(--text-secondary);margin-bottom:12px}
.info-detail{max-height:0;overflow:hidden;transition:max-height .4s;font-size:.8rem;color:var(--text-muted)}
.info-card.expanded .info-detail{max-height:100px}
.science{border-left:6px solid var(--electric-blue)}
.math{border-left:6px solid var(--coral-pink)}
.engineering{border-left:6px solid var(--sunny-yellow)}
.art{border-left:6px solid var(--royal-purple)}
.matching-game{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.matching-game h3{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.matching-game>p{font-size:.85rem;color:var(--text-muted);margin-bottom:16px}
.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.match-col{display:flex;flex-direction:column;gap:8px}
.match-item{padding:12px 16px;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:.85rem;font-weight:600;cursor:grab;transition:all var(--transition-fast);text-align:center}
.match-tech{background:var(--electric-blue);color:#fff}.match-science{background:var(--bg-secondary);color:var(--text-primary)}
.match-item:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.match-actions{display:flex;gap:8px;margin-top:16px}.match-feedback{margin-top:12px;font-weight:700}
.impact-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
.impact-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color)}
.impact-header{display:flex;align-items:center;gap:8px;margin-bottom:16px}.impact-icon{font-size:1.5rem}
.impact-card h3{font-size:1.1rem;font-weight:700}
.impact-card li{font-size:.9rem;color:var(--text-secondary);margin-bottom:8px}
.positive{border-left:6px solid var(--neon-green)}.negative{border-left:6px solid var(--coral-pink)}
.scenario-sim{margin:24px 0}.scenario-sim h3{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.scenario-sim>p{font-size:.85rem;color:var(--text-muted);margin-bottom:16px}
.scenario-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin-bottom:16px}
.scenario-header{margin-bottom:16px}
.scenario-badge{display:inline-block;background:var(--sunny-yellow);color:#000;padding:4px 12px;border-radius:50px;font-size:.75rem;font-weight:700;border:2px solid var(--border-color);margin-bottom:8px}
.scenario-header h4{font-size:1rem;font-weight:700}
.scenario-options{display:flex;flex-direction:column;gap:8px}
.scenario-btn{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);transition:all var(--transition-fast);text-align:left;color:var(--text-primary)}
.scenario-btn:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.scenario-btn span:first-child{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--electric-blue);color:#fff;border-radius:50%;font-weight:800;font-size:.8rem;flex-shrink:0}
.scenario-btn.good-choice{background:var(--neon-green);color:#000}
.scenario-btn.bad-choice{background:var(--coral-pink);color:#fff}
.scenario-feedback{margin-top:12px;font-weight:600;font-size:.9rem;min-height:24px}
.flip-cards-container{margin:24px 0}.flip-cards-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.flip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.flip-card{perspective:600px;height:160px;cursor:pointer}
.flip-inner{position:relative;width:100%;height:100%;transition:transform .6s;transform-style:preserve-3d}
.flip-card.flipped .flip-inner{transform:rotateY(180deg)}
.flip-front,.flip-back{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:16px;text-align:center;box-shadow:4px 4px 0 var(--border-color)}
.flip-front span{font-size:2rem}.flip-front h4{font-size:.9rem;font-weight:700}
.flip-back{transform:rotateY(180deg);background:var(--royal-purple);color:#fff}
.flip-back p{font-size:.8rem;line-height:1.5}
.activity-table-container{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin:24px 0}
.activity-table-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.activity-controls{display:flex;gap:16px;margin-bottom:16px;flex-wrap:wrap}
.group-input{flex:1;min-width:200px}.group-input label{display:block;font-size:.85rem;font-weight:600;margin-bottom:4px}
.group-input input{width:100%;padding:8px 12px;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);background:var(--bg-secondary);color:var(--text-primary);font-size:.9rem}
.table-responsive{overflow-x:auto}
.activity-table{width:100%;border-collapse:collapse;border:2px solid var(--border-color)}
.activity-table th{background:var(--electric-blue);color:#fff;padding:12px 16px;font-size:.85rem;font-weight:700;text-align:center;border:2px solid var(--border-color)}
.activity-table td{padding:8px;border:2px solid var(--border-color);min-width:120px}
.tech-name{font-weight:700;background:var(--bg-secondary);text-align:center;font-size:.9rem}
.editable-cell{background:var(--bg-secondary);min-height:40px;outline:none;font-size:.85rem;transition:background var(--transition-fast)}
.editable-cell:focus{background:#fff;box-shadow:inset 0 0 0 2px var(--electric-blue)}
.activity-actions{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.activity-feedback{margin-top:12px;font-weight:600}
.activity-tips{margin-top:24px}.activity-tips h4{font-size:1rem;font-weight:700;margin-bottom:12px}
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.tip-card{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);padding:12px}
.tip-card strong{display:block;font-size:.85rem;margin-bottom:4px}
.tip-card p{font-size:.78rem;color:var(--text-muted);line-height:1.5}
.quiz-pre{max-width:500px;margin:0 auto}
.quiz-intro-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:32px;box-shadow:4px 4px 0 var(--border-color);text-align:center}
.quiz-intro-card h3{font-size:1.3rem;font-weight:800;margin:16px 0}
.quiz-rules{text-align:left;margin-bottom:20px}
.quiz-rules li{padding:6px 0;font-size:.9rem;color:var(--text-secondary)}
.quiz-name-input{margin-bottom:20px}
.quiz-name-input label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px;text-align:left}
.quiz-name-input input{width:100%;padding:10px 14px;border:2px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:.95rem;background:var(--bg-secondary);color:var(--text-primary)}
.quiz-top-bar{display:flex;align-items:center;gap:16px;margin-bottom:20px;padding:12px 16px;background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-sm)}
.quiz-timer{display:flex;align-items:center;gap:6px;font-size:1.1rem;font-weight:800;color:var(--coral-pink);white-space:nowrap}
.quiz-timer.warning{animation:pulse 1s infinite}
.quiz-progress-bar{flex:1;height:10px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:50px;overflow:hidden}
.quiz-progress-fill{height:100%;width:5%;background:linear-gradient(90deg,var(--electric-blue),var(--neon-green));border-radius:50px;transition:width .3s}
.quiz-counter{font-weight:700;font-size:.9rem;white-space:nowrap}
.quiz-question-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:32px;box-shadow:4px 4px 0 var(--border-color);margin-bottom:20px}
.quiz-q-number{font-size:.85rem;font-weight:700;color:var(--electric-blue);margin-bottom:12px}
.quiz-q-text{font-size:1.05rem;font-weight:600;line-height:1.6;margin-bottom:20px}
.quiz-choices-q{display:flex;flex-direction:column;gap:10px}
.quiz-choice{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);cursor:pointer;transition:all var(--transition-fast);font-size:.9rem}
.quiz-choice:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--border-color)}
.quiz-choice .choice-letter{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--electric-blue);color:#fff;border-radius:50%;font-weight:800;font-size:.8rem;flex-shrink:0}
.quiz-choice.selected{background:var(--electric-blue);color:#fff;border-color:var(--electric-blue)}
.quiz-choice.selected .choice-letter{background:#fff;color:var(--electric-blue)}
.quiz-nav-buttons{display:flex;justify-content:space-between;gap:12px}
.btn-submit{background:var(--neon-green)!important;color:#000!important;font-weight:800!important}
.quiz-result{max-width:500px;margin:0 auto}
.result-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px;box-shadow:6px 6px 0 var(--border-color);text-align:center}
.result-icon{font-size:3rem;margin-bottom:12px}
.result-card h3{font-size:1.3rem;font-weight:800;margin-bottom:20px}
.result-score-container{display:flex;justify-content:center;margin-bottom:20px}
.result-circle{width:140px;height:140px;border-radius:50%;border:6px solid var(--electric-blue);display:flex;align-items:center;justify-content:center;flex-direction:column;background:var(--bg-secondary)}
.result-score{font-size:2.5rem;font-weight:900;color:var(--electric-blue);line-height:1}
.result-total{font-size:1rem;color:var(--text-muted);font-weight:600}
.result-detail p{font-size:.95rem;margin:4px 0}
.result-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:16px 0}
.result-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:20px}
.answers-review{margin-top:32px}.answers-review h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.answer-item{background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);padding:16px;margin-bottom:10px}
.answer-item .q{font-weight:700;font-size:.9rem;margin-bottom:6px}
.answer-item .a{font-size:.85rem}
.answer-item.correct-answer{border-left:4px solid var(--neon-green)}
.answer-item.wrong-answer{border-left:4px solid var(--coral-pink)}
.dash-profile{display:flex;align-items:center;gap:24px;background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:24px;box-shadow:4px 4px 0 var(--border-color);margin-bottom:24px;flex-wrap:wrap}
.profile-avatar{font-size:3rem}.profile-info{flex:1;min-width:200px}.profile-info h3{font-size:1.2rem;font-weight:700}
.profile-level{margin-top:8px}
.level-badge{display:inline-block;background:linear-gradient(135deg,var(--sunny-yellow),var(--neon-orange));color:#fff;padding:2px 12px;border-radius:50px;font-size:.75rem;font-weight:800;border:2px solid var(--border-color);margin-bottom:6px}
.xp-bar-container{display:flex;align-items:center;gap:8px}
.xp-bar{flex:1;height:12px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:50px;overflow:hidden}
.xp-bar-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--electric-blue),var(--royal-purple));border-radius:50px;transition:width .5s}
.xp-text{font-size:.8rem;font-weight:700;white-space:nowrap}
.profile-stats{display:flex;gap:16px}
.dash-stat{text-align:center;padding:12px 16px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);min-width:80px}
.dash-stat-value{display:block;font-size:1.3rem;font-weight:900;color:var(--electric-blue)}
.dash-stat-label{font-size:.7rem;color:var(--text-muted)}
.dash-charts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:24px}
.chart-card{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:20px;box-shadow:4px 4px 0 var(--border-color)}
.chart-card h4{font-size:.9rem;font-weight:700;margin-bottom:12px}
.chart-card canvas{max-height:200px}
.badges-container{margin-bottom:24px}.badges-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.badges-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.badge-card{text-align:center;padding:16px 12px;border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);background:var(--bg-card);transition:all var(--transition-normal)}
.badge-card:not(.locked):hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--border-color)}
.badge-card.locked{opacity:.4;filter:grayscale(1)}
.badge-card.unlocked{background:linear-gradient(135deg,var(--sunny-yellow),var(--neon-orange));color:#fff}
.badge-icon{font-size:2rem;display:block;margin-bottom:6px}
.badge-name{display:block;font-size:.75rem;font-weight:700;margin-bottom:2px}
.badge-desc{display:block;font-size:.65rem;color:var(--text-muted)}
.badge-card.unlocked .badge-desc{color:rgba(255,255,255,.8)}
.certificate-container{margin-bottom:24px}.certificate-container h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.certificate-card{background:linear-gradient(135deg,#fff,#f8f8ff);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-lg);padding:32px;text-align:center;box-shadow:6px 6px 0 var(--border-color);max-width:500px;margin:0 auto}
.cert-icon{font-size:3rem;display:block;margin-bottom:8px}
.certificate-card h4{font-size:1.3rem;font-weight:800;margin-bottom:16px}
.cert-body{margin:16px 0;font-size:.9rem;line-height:1.8}
.cert-footer{display:flex;justify-content:center;gap:12px;margin-top:20px}
.leaderboard-intro{text-align:center;margin-bottom:24px}.leaderboard-intro p{font-size:1rem;color:var(--text-secondary);margin-top:12px}
.leaderboard-podium{display:flex;justify-content:center;align-items:flex-end;gap:16px;margin-bottom:32px}
.podium-item{text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}
.podium-avatar{font-size:2rem}.podium-name{font-weight:700;font-size:.85rem}
.podium-score{font-size:.75rem;color:var(--text-muted);font-weight:600}
.podium-bar{width:80px;border-radius:var(--border-radius-sm) var(--border-radius-sm) 0 0;border:2px solid var(--border-color)}
.first-bar{height:120px;background:linear-gradient(180deg,var(--sunny-yellow),var(--neon-orange))}
.second-bar{height:80px;background:linear-gradient(180deg,#C0C0C0,#808080)}
.third-bar{height:60px;background:linear-gradient(180deg,#CD7F32,#8B4513)}
.podium-item.first .podium-avatar{font-size:2.5rem}
.podium-crown{font-size:1.5rem;animation:bounce 2s infinite}
.leaderboard-table-container{background:var(--bg-card);border:var(--border-width) solid var(--border-color);border-radius:var(--border-radius-md);padding:20px;box-shadow:4px 4px 0 var(--border-color);margin-bottom:16px;overflow-x:auto}
.leaderboard-table{width:100%;border-collapse:collapse}
.leaderboard-table th{background:var(--electric-blue);color:#fff;padding:10px 12px;font-size:.8rem;font-weight:700;text-align:center;border:2px solid var(--border-color)}
.leaderboard-table td{padding:10px 12px;text-align:center;font-size:.85rem;border:2px solid var(--border-color);background:var(--bg-secondary)}
.leaderboard-table tr:nth-child(1) td{background:rgba(255,215,0,0.1)}
.leaderboard-table tr:nth-child(2) td{background:rgba(192,192,192,0.1)}
.leaderboard-table tr:nth-child(3) td{background:rgba(205,127,50,0.1)}
.leaderboard-actions{display:flex;gap:8px;justify-content:center;margin-bottom:16px}
.leaderboard-note{text-align:center;font-size:.8rem;color:var(--text-muted);padding:12px}
.site-footer{text-align:center;padding:32px 20px;background:var(--bg-secondary);border-top:var(--border-width) solid var(--border-color);font-size:.8rem;color:var(--text-muted);line-height:2}
.toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-radius-sm);box-shadow:4px 4px 0 var(--border-color);font-weight:600;font-size:.85rem;animation:slideInRight .3s,fadeOut .3s 2.7s forwards;display:flex;align-items:center;gap:8px}
.toast.success{border-left:4px solid var(--neon-green)}
.toast.error{border-left:4px solid var(--coral-pink)}
.toast.info{border-left:4px solid var(--electric-blue)}
@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{opacity:1;transform:translateX(0)}}
@keyframes fadeOut{to{opacity:0;transform:translateX(50px)}}
.confetti-canvas{position:fixed;inset:0;pointer-events:none;z-index:9998}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
@media(max-width:1024px){
.welcome-grid{gap:24px}.welcome-3d-scene{min-height:auto;padding:60px 0}
.title-line{font-size:2.2rem}.content-grid{grid-template-columns:1fr}
.cycle-cards{grid-template-columns:1fr 1fr}.prediction-grid{grid-template-columns:1fr 1fr}
.badges-grid{grid-template-columns:repeat(3,1fr)}.flip-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.sidebar{width:200px}.main-content{margin-left:200px}.floating-nav{left:216px;width:calc(100% - 232px)}
.sidebar-user{flex-wrap:wrap;gap:8px;padding:12px 16px}.sidebar-avatar{font-size:1.4rem}.sidebar-xp{width:100%}
.sidebar-streak{padding:10px 16px}.sidebar-menu{padding:4px}.sidebar-item{padding:10px 12px;font-size:.82rem}
.floating-nav{padding:0 12px}.nav-title{display:none}.nav-center{max-width:120px}
.welcome-grid{grid-template-columns:1fr}.welcome-visual{order:-1}.lottie-wrapper{max-width:280px}
.welcome-3d-scene{min-height:auto;padding:40px 0}
.title-line{font-size:1.8rem}.welcome-stats{gap:8px}.stat-card{padding:12px}.stat-number{font-size:1.4rem}
.page-title{font-size:1.4rem}.cycle-cards{grid-template-columns:1fr}.dnd-zones{grid-template-columns:1fr}
.comparison-grid{grid-template-columns:1fr}.prediction-grid{grid-template-columns:1fr}
.infographic-grid{grid-template-columns:1fr}.impact-grid{grid-template-columns:1fr}
.flip-grid{grid-template-columns:repeat(2,1fr)}.dash-charts{grid-template-columns:1fr}
.badges-grid{grid-template-columns:repeat(2,1fr)}.tips-grid{grid-template-columns:1fr}
.leaderboard-podium{gap:8px}.podium-bar{width:60px}.profile-stats{width:100%;justify-content:center}
.match-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
.sidebar{width:56px}.sidebar-header h2,.sidebar-user-info,.sidebar-streak,.sidebar-item span{display:none}
.sidebar-item{text-align:center;padding:10px 4px;font-size:1rem}.sidebar-user{justify-content:center;padding:12px 4px}
.sidebar-avatar{font-size:1.3rem}.sidebar-xp{display:none}.sidebar-streak{display:none}
.main-content{margin-left:56px}.floating-nav{left:72px;width:calc(100% - 88px)}
.nav-actions{gap:2px}.nav-btn{width:34px;height:34px}.title-line{font-size:1.5rem}
.container{padding:0 12px}.text-card{padding:16px}.flip-card{height:140px}
.badges-grid{grid-template-columns:repeat(2,1fr)}.quiz-top-bar{flex-wrap:wrap}.quiz-question-card{padding:20px}
}