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ease;color:var(--color-text-muted);background:transparent}.tab-btn.active{background:#fff;color:var(--color-primary);box-shadow:var(--shadow-sm)}.tab-btn:hover:not(.active){color:var(--color-text-main)}.modules-section h3{font-family:var(--font-heading);font-size:1.6rem;font-weight:800;margin-bottom:1.5rem;display:flex;align-items:center;gap:.75rem;background:linear-gradient(135deg,#334155 0%,var(--color-primary) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:.02em;text-transform:uppercase;position:relative;padding-left:16px}.modules-section h3:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:70%;background:linear-gradient(180deg,var(--color-primary),var(--color-secondary));border-radius:2px}.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:2rem}.module-card{background:#fff;border-radius:20px;padding:2rem;text-align:center;transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer;border:1px solid #f1f5f9;box-shadow:var(--shadow-sm);position:relative;overflow:hidden;height:100%;display:flex;flex-direction:column;align-items:center}.module-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-soft);border-color:var(--color-primary-light)}.module-icon{font-size:3.5rem;margin-bottom:1.5rem;transition:transform .3s ease;background:#f8fafc;width:100px;height:100px;display:flex;align-items:center;justify-content:center;border-radius:50%}.module-card:hover .module-icon{transform:scale(1.1) rotate(5deg);background:var(--color-primary-light)}.module-image-container{width:100%;margin-bottom:1.25rem;border-radius:16px;overflow:hidden;background:linear-gradient(135deg,#f8fafc,#e2e8f0)}.module-image-container.learning-image{height:400px;background:linear-gradient(135deg,#f0f4ff,#fff,#f5f0ff)}.learning-image .module-image{-o-object-fit:contain;object-fit:contain}.learning-grid{grid-template-columns:repeat(2,1fr);max-width:1300px;margin:0 auto;gap:3rem}.learning-grid .module-card{padding:1.5rem}.module-image-container.practice-image{height:220px;border-radius:16px;background:linear-gradient(135deg,#e8f4f8,#f0f7fa,#e8f0f8)}.practice-grid .module-card{padding:1.25rem}.practice-image .module-image{-o-object-fit:cover;object-fit:cover;width:100%;height:100%}.practice-grid .module-card:nth-child(2) .module-image,.practice-grid .module-card:nth-child(3) .module-image{transform:scale(1.15)}.module-image{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;transition:transform .3s ease}.module-card:hover .module-image{transform:scale(1.05)}.module-card h4{font-family:var(--font-heading);font-size:1.3rem;margin-bottom:.75rem;font-weight:800;background:linear-gradient(135deg,#1e293b,#475569);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.01em;transition:all .3s ease}.module-card:hover h4{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 100%);-webkit-background-clip:text;background-clip:text}.module-desc{color:#64748b;font-size:.95rem;margin-bottom:1.5rem;line-height:1.6;flex-grow:1;font-weight:500;letter-spacing:.01em}.module-status{display:inline-flex;align-items:center;background:#f1f5f9;padding:.5rem 1.2rem;border-radius:99px;font-size:.85rem;color:var(--color-text-muted);font-weight:600;margin-top:auto;transition:all .2s}.module-card:hover .module-status{background:var(--color-primary);color:#fff}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.auth-container{flex:1;display:flex;justify-content:center;align-items:center;padding:2rem;background:linear-gradient(135deg,#f0fdf4,#fff,#f0f9ff)}.auth-logo{display:block;max-height:80px;width:auto;margin:0 auto 1.5rem}.auth-card{background:#fff;border:1px solid #e2e8f0;border-radius:24px;padding:3rem;width:100%;max-width:450px;box-shadow:var(--shadow-lg);animation:fadeInUp .5s ease-out}.auth-card h2{font-family:var(--font-heading);font-size:2rem;color:var(--color-text-main);margin-bottom:2rem;text-align:center;font-weight:800}.form-group label{color:var(--color-text-main);font-weight:600}.form-group input{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;color:var(--color-text-main)}.form-group input:focus{background:#fff;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.auth-button{background:var(--color-primary);border-radius:12px;padding:1.2rem;box-shadow:0 4px 6px -1px #6366f166}.auth-button:hover{background:var(--color-primary-hover);transform:translateY(-2px);box-shadow:0 10px 15px -3px #6366f180}.lesson-view{background:#f8fafc;gap:1.5rem}.lesson-content,.lesson-playground{background:#fff;border:1px solid #e2e8f0;border-radius:20px;box-shadow:var(--shadow-sm)}.lesson-content h2{color:var(--color-text-main)}.concept-badge{background:var(--color-primary-light);color:var(--color-primary)}.code-block{background:#1e293b;border-radius:12px}.example-section{background:#f8fafc;border-left:4px solid var(--color-primary);border-radius:8px}.challenge-section{background:#fff1f2;border-left:4px solid var(--color-secondary)}.lesson-item.completed{border-color:var(--color-success);background:#ecfdf5}.module-page{max-width:1000px;margin:0 auto;padding:2rem}.module-header h1{font-family:var(--font-heading);font-size:2rem;font-weight:700;color:var(--color-text-main);margin-top:1rem}.back-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#fff;border:1px solid #e2e8f0;border-radius:8px;color:var(--color-text-muted);font-size:.875rem;cursor:pointer;transition:all .2s}.back-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-light)}.units-container{display:flex;flex-direction:column;gap:1.5rem}.unit-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid #e2e8f0}.unit-card h2{padding:1.25rem 1.5rem;margin:0;font-family:var(--font-heading);font-size:1.25rem;font-weight:700;color:var(--color-text-main);background:linear-gradient(135deg,var(--color-primary-light) 0%,rgba(255,255,255,0) 100%);border-bottom:1px solid #e2e8f0}.lessons-list{display:flex;flex-direction:column}.lesson-item{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border-bottom:1px solid #f1f5f9;cursor:pointer;transition:all .2s ease}.lesson-item:last-child{border-bottom:none}.lesson-item:hover{background:var(--color-primary-light);transform:translate(4px)}.lesson-item.completed{background:#ecfdf5}.lesson-item.completed .lesson-title{color:var(--color-success)}.lesson-item.locked{opacity:.5;cursor:not-allowed}.lesson-info{display:flex;flex-direction:column;gap:.25rem}.lesson-title{font-weight:600;font-size:1rem;color:var(--color-text-main)}.lesson-concept{font-size:.875rem;color:var(--color-text-muted)}.lesson-status{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:#f1f5f9;color:var(--color-text-muted);transition:all .2s}.lesson-item:hover .lesson-status{background:var(--color-primary);color:#fff}.lesson-item.completed .lesson-status{background:var(--color-success);color:#fff}.loading{display:flex;align-items:center;justify-content:center;min-height:300px;font-size:1.125rem;color:var(--color-text-muted)}:root{--color-border: #e2e8f0;--color-bg-elevated: #f8fafc;--color-primary-dark: #4f46e5}.auth-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 80px);padding:2rem;position:relative;z-index:10}.auth-card{background:#ffffffe6;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);padding:3.5rem;border-radius:24px;box-shadow:0 25px 50px -12px #0000001a,0 0 0 1px #fff9 inset;width:100%;max-width:440px;animation:authSlideUp .6s cubic-bezier(.16,1,.3,1);position:relative;overflow:hidden}.auth-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent))}.auth-card h2{font-family:var(--font-heading);font-size:2.25rem;font-weight:800;text-align:center;margin-bottom:2.5rem;color:var(--color-text-main);background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-size:.9rem;font-weight:600;color:var(--color-text-main);margin-bottom:.5rem;margin-left:.25rem}.form-group input{width:100%;padding:.875rem 1.25rem;border:2px solid #e2e8f0;border-radius:12px;font-size:1rem;font-family:var(--font-body);transition:all .2s cubic-bezier(.4,0,.2,1);background:#f8fafc;color:var(--color-text-main)}.form-group input:hover{border-color:#cbd5e1}.form-group input:focus{outline:none;border-color:var(--color-primary);background:#fff;box-shadow:0 0 0 4px var(--color-primary-light);transform:translateY(-1px)}.form-group input::-moz-placeholder{color:#94a3b8}.form-group input::placeholder{color:#94a3b8}.error-message{background:#fef2f2;border:1px solid #fee2e2;color:#ef4444;padding:.75rem;border-radius:8px;font-size:.875rem;margin-bottom:1.5rem;text-align:center;font-weight:500;display:flex;align-items:center;justify-content:center;gap:.5rem}.auth-button{width:100%;padding:1rem;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-hover));color:#fff;border:none;border-radius:14px;font-size:1.125rem;font-weight:700;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);margin-top:1rem;box-shadow:0 4px 6px -1px #6366f133;display:flex;justify-content:center;align-items:center;gap:.5rem}.auth-button:hover{transform:translateY(-2px);box-shadow:0 10px 20px -5px #6366f166;filter:brightness(1.05)}.auth-button:active{transform:translateY(0)}.auth-button:disabled{opacity:.7;cursor:not-allowed;transform:none!important}.auth-link{text-align:center;margin-top:2rem;color:var(--color-text-muted);font-size:.95rem;padding-top:1.5rem;border-top:1px solid #f1f5f9}.auth-link a{color:var(--color-primary);text-decoration:none;font-weight:700;margin-left:.5rem;position:relative;transition:color .2s}.auth-link a:hover{color:var(--color-primary-dark)}.auth-link a:after{content:"";position:absolute;width:100%;height:2px;bottom:-2px;left:0;background-color:var(--color-primary);transform:scaleX(0);transform-origin:bottom right;transition:transform .3s ease-out}.auth-link a:hover:after{transform:scaleX(1);transform-origin:bottom left}@keyframes authSlideUp{0%{opacity:0;transform:translateY(40px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:640px){.auth-card{padding:2rem}.auth-card h2{font-size:1.75rem}}.dashboard:before,.dashboard:after{content:"";position:fixed;border-radius:50%;filter:blur(100px);opacity:.4;pointer-events:none;z-index:-1}.dashboard:before{width:600px;height:600px;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 70%);top:-200px;right:-200px;animation:floatOrb 20s ease-in-out infinite}.dashboard:after{width:500px;height:500px;background:radial-gradient(circle,rgba(139,92,246,.12) 0%,transparent 70%);bottom:-150px;left:-150px;animation:floatOrb 25s ease-in-out infinite reverse}@keyframes floatOrb{0%,to{transform:translate(0) scale(1)}25%{transform:translate(30px,-20px) scale(1.05)}50%{transform:translate(-20px,30px) scale(.95)}75%{transform:translate(20px,20px) scale(1.02)}}.module-card{background:#ffffffd9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.5);box-shadow:0 8px 32px #6366f114,0 0 0 1px #ffffff1a inset;transition:all .4s cubic-bezier(.4,0,.2,1)}.module-card:hover{background:#fffffff2;border-color:#6366f133;box-shadow:0 20px 50px #6366f126,0 0 0 1px #6366f11a,0 0 40px #6366f10d;transform:translateY(-8px)}.module-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent 0%,rgba(99,102,241,.5) 20%,rgba(139,92,246,.6) 50%,rgba(99,102,241,.5) 80%,transparent 100%);border-radius:20px 20px 0 0;opacity:0;transition:opacity .3s ease}.module-card:hover:before{opacity:1}.hero-section:after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(99,102,241,.08) 1px,transparent 1px);background-size:40px 40px;z-index:0;animation:gridPulse 8s ease-in-out infinite}@keyframes gridPulse{0%,to{opacity:.3}50%{opacity:.6}}.cta-button{position:relative;overflow:hidden}.cta-button:before{content:"";position:absolute;top:50%;left:50%;width:120%;height:120%;background:radial-gradient(circle,rgba(255,255,255,.3) 0%,transparent 60%);transform:translate(-50%,-50%) scale(0);transition:transform .5s ease}.cta-button:hover:before{transform:translate(-50%,-50%) scale(1)}.modules-section h3:before{content:"";display:inline-block;width:4px;height:1.2em;background:var(--tech-gradient-1);border-radius:2px;margin-right:12px;vertical-align:middle;box-shadow:0 0 10px var(--tech-glow-primary)}.tab-btn{position:relative;overflow:hidden}.tab-btn.active:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:40%;height:2px;background:var(--tech-gradient-1);border-radius:2px;box-shadow:0 0 8px var(--tech-glow-primary)}@keyframes float{0%,to{transform:translateY(0) translate(0);opacity:.3}50%{transform:translateY(-20px) translate(10px);opacity:.6}}.floating-shapes{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:hidden}.floating-shapes>div{position:absolute;opacity:.75}.shape-circle{border-radius:50%;background:linear-gradient(135deg,#6366f14d,#8b5cf638)}.shape-1{width:180px;height:180px;top:12%;right:6%;animation:floatShape1 18s ease-in-out infinite}.shape-2{width:130px;height:130px;bottom:18%;left:5%;background:linear-gradient(135deg,#4f46e540,#6366f12e);animation:floatShape2 22s ease-in-out infinite}.shape-ring{border-radius:50%;border:3px solid 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80px);padding:2rem 3rem;max-width:1400px;margin:0 auto;width:100%}.module-header{margin-bottom:2rem}.module-header h1{font-family:var(--font-heading);font-size:2.2rem;font-weight:800;margin-top:1rem;background:linear-gradient(135deg,#1e293b 0%,var(--color-primary) 50%,var(--color-secondary) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.01em;position:relative;padding-bottom:.75rem}.module-header h1:after{content:"";position:absolute;bottom:0;left:0;width:80px;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:2px}.back-btn{display:inline-flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,#3b82f614,#6366f11f);border:1px solid rgba(59,130,246,.2);color:#1e40af;padding:.6rem 1.2rem;border-radius:999px;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .3s ease}.back-btn:hover{background:linear-gradient(135deg,#3b82f626,#8b5cf633);border-color:#6366f166;transform:translate(-3px);box-shadow:0 4px 12px #6366f133}.units-container{display:flex;flex-direction:column;gap:2rem}.unit-card{background:#fff;border-radius:20px;padding:2rem;border:1px solid #f1f5f9;box-shadow:var(--shadow-sm)}.unit-card h2{font-family:var(--font-heading);font-size:1.5rem;font-weight:800;margin-bottom:1.5rem;background:linear-gradient(135deg,#334155 0%,var(--color-primary) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:.01em;display:flex;align-items:center;gap:.75rem;padding-left:16px;position:relative}.unit-card h2:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:60%;background:linear-gradient(180deg,var(--color-primary),var(--color-secondary));border-radius:2px}.lessons-list{display:flex;flex-direction:column;gap:.75rem}.lesson-item{display:flex;align-items:center;padding:1.25rem 1.5rem;background:linear-gradient(135deg,#f8fafc,#fff);border:1px solid #e2e8f0;border-radius:16px;cursor:pointer;transition:all .3s ease}.lesson-item:hover{background:linear-gradient(135deg,#6366f10d,#8b5cf614);border-color:#6366f14d;transform:translate(8px);box-shadow:0 4px 15px #6366f126}.lesson-item.completed{border-left:4px solid #22c55e}.lesson-info{flex:1;display:flex;flex-direction:column;gap:.25rem}.lesson-title{font-weight:700;font-size:1.1rem;color:#1e293b;letter-spacing:-.01em;transition:all .3s ease}.lesson-item:hover .lesson-title{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 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