:root{--color-bg-primary:#fff;--color-bg-secondary:#f8fafc;--color-bg-tertiary:#f1f5f9;--color-surface:#f1f5f9cc;--color-surface-hover:#e2e8f0e6;--color-primary:#3b82f6;--color-primary-dark:#1d4ed8;--color-primary-light:#60a5fa;--color-secondary:#0ea5e9;--gradient-primary:linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);--gradient-secondary:linear-gradient(135deg, #0ea5e9 0%, #3b82f6 100%);--gradient-accent:linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);--color-text-primary:#0f172a;--color-text-secondary:#334155;--color-text-muted:#64748b;--color-border:#e2e8f0;--color-border-hover:#3b82f6;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000d;--shadow-xl:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000000d;--shadow-glow:0 0 20px #3b82f640;--spacing-xs:.25rem;--spacing-sm:.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--radius-sm:.375rem;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem;--radius-2xl:1.5rem;--transition-fast:.15s ease;--transition-base:.2s ease;--transition-slow:.3s ease;--transition-slower:.4s ease;--navbar-height:70px;--sidebar-max-height:400px}[data-theme=dark]{--color-bg-primary:#0f172a;--color-bg-secondary:#1e293b;--color-bg-tertiary:#334155;--color-surface:#1e293bcc;--color-surface-hover:#334155e6;--color-text-primary:#f8fafc;--color-text-secondary:#e2e8f0;--color-text-muted:#94a3b8;--color-border:#334155;--color-border-hover:#60a5fa;--shadow-sm:0 1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #0006;--shadow-lg:0 10px 15px -3px #0006;--shadow-xl:0 20px 25px -5px #00000080;--shadow-glow:0 0 20px #3b82f64d}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--color-text-primary);background:var(--color-bg-primary);min-height:100vh;transition:background-color var(--transition-slow), color var(--transition-slow);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;overflow-x:hidden}h1{font-size:clamp(2rem,5vw,3rem);font-weight:700;line-height:1.2}h2{font-size:clamp(1.5rem,4vw,2rem);font-weight:600;line-height:1.3}h3{font-size:clamp(1.25rem,3vw,1.5rem);font-weight:600;line-height:1.4}.navbar{background:var(--color-surface);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);z-index:1000;height:var(--navbar-height);transition:all var(--transition-slow);position:fixed;top:0;left:0;right:0}.nav-container{max-width:1400px;padding:0 var(--spacing-xl);justify-content:space-between;align-items:center;height:100%;margin:0 auto;display:flex}.nav-brand{align-items:center;gap:var(--spacing-sm);letter-spacing:-.025em;color:var(--color-text-primary);cursor:pointer;transition:transform var(--transition-base);font-size:1.5rem;font-weight:800;display:flex}.nav-brand:hover{transform:scale(1.02)}.nav-brand svg{filter:drop-shadow(0 0 10px #3b82f666)}.nav-toggle{background:var(--color-bg-tertiary);border:1px solid var(--color-border);cursor:pointer;padding:var(--spacing-sm);border-radius:var(--radius-md);width:40px;height:40px;transition:all var(--transition-base);flex-direction:column;justify-content:center;align-items:center;gap:4px;display:none}.nav-toggle:hover{background:var(--color-surface-hover);border-color:var(--color-primary)}.nav-toggle span{background:var(--color-text-primary);width:20px;height:2px;transition:all var(--transition-slow);border-radius:2px}.nav-toggle.active span:first-child{transform:translateY(6px)rotate(45deg)}.nav-toggle.active span:nth-child(2){opacity:0;transform:translate(-10px)}.nav-toggle.active span:nth-child(3){transform:translateY(-6px)rotate(-45deg)}.nav-menu{gap:var(--spacing-xs);align-items:center;list-style:none;display:flex}.nav-link{color:var(--color-text-secondary);padding:var(--spacing-sm) var(--spacing-lg);transition:all var(--transition-base);border-radius:var(--radius-md);cursor:pointer;align-items:center;gap:var(--spacing-sm);background:0 0;border:none;font-family:inherit;font-size:.9375rem;font-weight:600;text-decoration:none;display:flex;position:relative}.nav-link:hover{color:var(--color-primary);background:var(--color-bg-tertiary)}.nav-link.active{color:var(--color-primary);background:#3b82f61a}.nav-link.active:after{content:"";background:var(--gradient-primary);border-radius:3px 3px 0 0;height:3px;animation:.3s scaleInX;position:absolute;bottom:0;left:20%;right:20%}@keyframes scaleInX{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.theme-toggle{background:var(--color-bg-tertiary);border:1px solid var(--color-border);color:var(--color-text-primary);cursor:pointer;width:40px;height:40px;transition:all var(--transition-base);margin-left:var(--spacing-sm);border-radius:10px;justify-content:center;align-items:center;display:flex}.theme-toggle:hover{border-color:var(--color-primary);background:var(--color-surface-hover);color:var(--color-primary);transform:translateY(-2px);box-shadow:0 4px 12px #3b82f633}.nav-actions{align-items:center;gap:var(--spacing-sm);display:flex}.sidebar{top:var(--navbar-height);background:var(--color-bg-secondary);max-height:0;transition:max-height var(--transition-slower) ease, padding var(--transition-slower) ease;z-index:999;box-shadow:var(--shadow-xl);border-bottom:1px solid var(--color-border);position:fixed;left:0;right:0;overflow:hidden}.sidebar.active{max-height:var(--sidebar-max-height);padding:var(--spacing-md) 0}.sidebar-menu{list-style:none}.sidebar-link,.sidebar-btn{color:var(--color-text-primary);padding:var(--spacing-md) var(--spacing-xl);align-items:center;gap:var(--spacing-sm);transition:background-color var(--transition-base);cursor:pointer;background:0 0;border:none;width:100%;font-family:inherit;font-size:1rem;font-weight:500;text-decoration:none;display:flex}.sidebar-link:hover,.sidebar-btn:hover{background:var(--color-surface-hover)}.main-content{margin-top:var(--navbar-height);padding:var(--spacing-2xl) var(--spacing-md);transition:margin-top var(--transition-slower) ease;min-height:calc(100vh - var(--navbar-height))}.main-content.sidebar-open{margin-top:calc(var(--navbar-height) + var(--sidebar-max-height))}.container{max-width:1400px;padding:0 var(--spacing-md);margin:0 auto}.hero-section{text-align:center;padding:var(--spacing-2xl) 0;margin-bottom:var(--spacing-2xl)}.hero-title{margin-bottom:var(--spacing-md);animation:.6s fadeInUp}.gradient-text{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:var(--color-text-secondary);margin-bottom:var(--spacing-xl);font-size:clamp(1rem,2.5vw,1.25rem);animation:.6s .2s both fadeInUp}.hero-stats{justify-content:center;gap:var(--spacing-2xl);flex-wrap:wrap;animation:.6s .4s both fadeInUp;display:flex}.stat-item{align-items:center;gap:var(--spacing-xs);flex-direction:column;display:flex}.stat-value{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:clamp(1.5rem,4vw,2.5rem);font-weight:700}.stat-label{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.875rem}.section-header{margin-bottom:var(--spacing-xl);justify-content:space-between;align-items:center;display:flex}.btn{background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-primary);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;align-items:center;gap:var(--spacing-sm);transition:all var(--transition-base);font-size:.875rem;font-weight:500;display:flex}.btn:hover{background:var(--color-surface-hover);border-color:var(--color-primary);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.btn-primary{background:var(--gradient-primary);color:#fff;border:none}.btn-primary:hover{box-shadow:var(--shadow-glow)}.repositories-grid{gap:var(--spacing-lg);margin-bottom:var(--spacing-xl);grid-template-columns:repeat(auto-fill,minmax(320px,1fr));display:grid}.about-feature-card{border:1px solid var(--color-border);padding:var(--spacing-xl);border-radius:var(--radius-xl);background:0 0;transition:all .3s}.repo-card{border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-lg);cursor:pointer;transition:all var(--transition-base);background:0 0;animation:.4s fadeIn}.repo-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-glow);transform:translateY(-5px)}.repo-header{align-items:flex-start;gap:var(--spacing-md);margin-bottom:var(--spacing-md);display:flex}.repo-icon{background:var(--gradient-primary);border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.5rem;display:flex}.repo-info{flex:1}.repo-name{color:var(--color-text-primary);margin-bottom:var(--spacing-xs);font-size:1.125rem;font-weight:600}.repo-owner{color:var(--color-text-muted);font-size:.875rem}.repo-description{color:var(--color-text-secondary);margin-bottom:var(--spacing-md);-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;font-size:.875rem;line-height:1.5;display:-webkit-box;overflow:hidden}.repo-stats{gap:var(--spacing-lg);color:var(--color-text-muted);font-size:.875rem;display:flex}.repo-stat{align-items:center;gap:var(--spacing-xs);display:flex}.subjects-grid{gap:var(--spacing-xl);margin-top:var(--spacing-xl);perspective:1000px;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));display:grid}.subject-card{border:1px solid var(--color-border);padding:var(--spacing-xl);cursor:pointer;gap:var(--spacing-lg);-webkit-backdrop-filter:blur(8px);background:0 0;border-radius:16px;flex-direction:column;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden}.subject-card-glow{background:radial-gradient(circle at 50% -20%, var(--color-primary-light), transparent 70%);opacity:0;pointer-events:none;width:100%;height:100%;transition:opacity .4s;position:absolute;top:0;left:0}.subject-icon-container{background:var(--color-surface-light);border:1px solid var(--color-border);border-radius:14px;justify-content:center;align-items:center;width:54px;height:54px;font-size:1.75rem;transition:all .3s;display:flex}.subject-card:hover .subject-icon-container{background:var(--color-primary);border-color:var(--color-primary);box-shadow:0 0 20px var(--color-primary-light);transform:scale(1.1)rotate(-5deg)}.subject-badge{color:var(--color-primary);text-transform:uppercase;letter-spacing:.05em;background:#3b82f61a;border:1px solid #3b82f633;border-radius:20px;padding:6px 12px;font-size:.75rem;font-weight:700}.subject-body{gap:var(--spacing-xs);flex-direction:column;display:flex}.subject-name{color:var(--color-text-primary);text-transform:capitalize;margin:0;font-size:1.35rem;font-weight:700}.subject-description{color:var(--color-text-secondary);-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:.9375rem;line-height:1.5;display:-webkit-box;overflow:hidden}.subject-footer{padding-top:var(--spacing-md);border-top:1px solid var(--color-border);justify-content:space-between;align-items:center;margin-top:auto;display:flex}.study-action{color:var(--color-primary);opacity:.8;font-size:.875rem;font-weight:600;transition:opacity .3s}.subject-card:hover .study-action{opacity:1}.subject-card-glare{z-index:0;pointer-events:none;background:linear-gradient(90deg,#fff0 0%,#ffffff1a 50%,#fff0 100%);width:50%;height:100%;transition:all .7s;position:absolute;top:0;left:-100%;transform:skew(-25deg)}.subject-card:hover .subject-card-glare{left:200%}.subject-card-orb{filter:blur(40px);opacity:0;z-index:-1;pointer-events:none;border-radius:50%;transition:all .7s cubic-bezier(.34,1.56,.64,1);position:absolute}.subject-card-orb-1{background:#3b82f659;width:120px;height:120px;top:-30px;left:-30px}.subject-card-orb-2{background:#93c5fd40;width:140px;height:140px;bottom:-40px;right:-20px}.subject-card:hover .subject-card-orb{opacity:1;transform:scale(1.3)}.subject-card-pattern{opacity:.2;z-index:-1;pointer-events:none;background-image:radial-gradient(#3b82f640 1px,#0000 1px);background-size:16px 16px;transition:opacity .4s;position:absolute;inset:0;-webkit-mask-image:radial-gradient(#000 0%,#0000 80%);mask-image:radial-gradient(#000 0%,#0000 80%)}.subject-card:hover .subject-card-pattern{opacity:.5}.subject-card-arrow-container{width:32px;height:32px;color:var(--color-primary);background:#3b82f614;border-radius:50%;justify-content:center;align-items:center;transition:all .3s cubic-bezier(.34,1.56,.64,1);display:flex}.subject-card:hover .subject-card-arrow-container{background:var(--color-primary);color:#fff;transform:translate(4px)scale(1.1)}.subject-card:hover .subject-card-arrow-container .subject-arrow{color:#fff}.practical-flow{animation:.5s fadeIn}.practical-step-header{align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-md);display:flex}.practical-back-btn{color:var(--color-primary);background:#3b82f61f;border-color:#3b82f659;font-weight:700}.practical-back-btn:hover{background:#3b82f633;border-color:#3b82f680;transform:translateY(-1px)}.empty-state{padding:60px var(--spacing-xl);background:var(--color-surface);border:1px dashed var(--color-border);border-radius:var(--radius-2xl);margin-top:var(--spacing-xl);color:var(--color-text-muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;animation:.5s fadeIn;display:flex}.empty-icon{margin-bottom:var(--spacing-lg);filter:grayscale(.5);opacity:.6;font-size:3.5rem}.empty-state p{font-size:1.1rem;font-weight:500}.progress-page{min-height:60vh;padding:var(--spacing-2xl) 0;justify-content:center;align-items:center;animation:.6s fadeInUp;display:flex}.progress-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-2xl);width:100%;max-width:760px;box-shadow:var(--shadow-xl);text-align:center;padding:clamp(1.5rem,4vw,3rem)}.progress-badge{align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg);color:var(--color-primary);text-transform:uppercase;letter-spacing:.08em;background:#3b82f61a;border-radius:999px;padding:.45rem .85rem;font-size:.8rem;font-weight:700;display:inline-flex}.progress-dot{background:var(--color-primary);border-radius:999px;width:10px;height:10px;animation:1.8s infinite pulseGlow;box-shadow:0 0 #3b82f659}.progress-title{margin-bottom:var(--spacing-md);font-size:clamp(2rem,6vw,3.25rem);line-height:1.05}.progress-subtitle{color:var(--color-text-secondary);max-width:58ch;margin:0 auto;font-size:1rem;line-height:1.7}.progress-tags{gap:var(--spacing-sm);margin:var(--spacing-xl) 0;flex-wrap:wrap;justify-content:center;display:flex}.progress-tag{border:1px solid var(--color-border);background:var(--color-bg-secondary);color:var(--color-text-secondary);border-radius:999px;align-items:center;padding:.55rem .9rem;font-size:.875rem;font-weight:600;display:inline-flex}.progress-actions{justify-content:center;gap:var(--spacing-md);margin-top:var(--spacing-xl);flex-wrap:wrap;display:flex}.about-container{max-width:1000px;padding-bottom:var(--spacing-2xl);margin:0 auto;animation:.6s fadeIn}.about-hero{text-align:center;padding:var(--spacing-2xl) 0;margin-bottom:var(--spacing-2xl);position:relative}.about-title{margin-bottom:var(--spacing-md);letter-spacing:-.05em;font-size:clamp(2.5rem,8vw,4rem);font-weight:900;line-height:1.1}.about-subtitle{color:var(--color-text-secondary);max-width:600px;margin:0 auto var(--spacing-xl);font-size:1.25rem;line-height:1.6}.about-hero-badge{background:var(--color-bg-tertiary);border:1px solid var(--color-border);color:var(--color-primary);text-transform:uppercase;letter-spacing:.1em;border-radius:20px;padding:6px 16px;font-size:.8125rem;font-weight:700;display:inline-block}.about-grid{gap:var(--spacing-lg);margin-bottom:var(--spacing-2xl);grid-template-columns:repeat(auto-fit,minmax(220px,1fr));display:grid}.about-feature-card{background:var(--color-surface);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-xl);text-align:center;transition:all var(--transition-base)}.about-feature-card:hover{border-color:var(--color-primary);transform:translateY(-8px);box-shadow:0 10px 30px #3b82f626}.feature-icon-wrapper{background:var(--gradient-primary);color:#fff;width:56px;height:56px;margin:0 auto var(--spacing-lg);border-radius:16px;justify-content:center;align-items:center;display:flex;box-shadow:0 8px 16px #3b82f633}.about-feature-card h3{margin-bottom:var(--spacing-sm);font-size:1.25rem}.about-feature-card p{color:var(--color-text-secondary);font-size:.9375rem;line-height:1.5}.about-content-section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-2xl);padding:var(--spacing-2xl);margin-bottom:var(--spacing-2xl)}.content-box h2{margin-bottom:var(--spacing-lg)}.content-box p{color:var(--color-text-secondary);margin-bottom:var(--spacing-xl);font-size:1.125rem;line-height:1.8}.mission-quote{color:var(--color-primary);border-left:4px solid var(--color-primary);padding-left:var(--spacing-lg);margin:var(--spacing-xl) 0;font-size:1.5rem;font-style:italic;font-weight:600}.footer{border-top:1px solid var(--color-border);padding:var(--spacing-xl) 0;margin-top:var(--spacing-3xl);background:var(--color-surface);-webkit-backdrop-filter:blur(12px)}.footer-container{max-width:1400px;padding:0 var(--spacing-xl);margin:0 auto}.footer-content{justify-content:center;align-items:center;gap:var(--spacing-md);color:var(--color-text-secondary);text-align:center;flex-direction:column;display:flex}.footer-copyright{align-items:center;gap:var(--spacing-sm);font-size:.9375rem;font-weight:500;display:flex}.author-link{color:var(--color-primary);transition:all var(--transition-base);border-bottom:2px solid #0000;font-weight:700;text-decoration:none}.author-link:hover{border-bottom-color:var(--color-primary);filter:brightness(1.2)}.footer-copyright .dot{opacity:.4}.search-container{margin-bottom:var(--spacing-xl);position:relative}.search-icon{left:var(--spacing-md);color:var(--color-text-muted);pointer-events:none;position:absolute;top:50%;transform:translateY(-50%)}.search-input{width:100%;padding:var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);color:var(--color-text-primary);transition:all var(--transition-base);font-size:1rem}.search-input:focus{border-color:var(--color-primary);box-shadow:var(--shadow-glow);outline:none}.search-input::placeholder{color:var(--color-text-muted)}.notes-list{gap:var(--spacing-md);margin-top:var(--spacing-xl);flex-direction:column;display:flex}.note-item-card{border:1px solid var(--color-border);padding:var(--spacing-lg);cursor:pointer;align-items:center;gap:var(--spacing-lg);background:0 0;border-radius:16px;transition:all .3s cubic-bezier(.23,1,.32,1);display:flex;position:relative;overflow:hidden}.note-item-card:hover{border-color:var(--color-primary);background:0 0;transform:translate(8px);box-shadow:0 10px 20px #0000001a}.note-item-card:before{content:"";background:var(--color-primary);border-radius:0 4px 4px 0;width:4px;height:0;transition:height .3s;position:absolute;top:50%;left:0;transform:translateY(-50%)}.note-item-card:hover:before{height:50%}.note-card-icon-wrapper{background:var(--color-surface-light);border:1px solid var(--color-border);width:48px;height:48px;color:var(--color-text-secondary);border-radius:12px;justify-content:center;align-items:center;transition:all .3s;display:flex}.note-item-card:hover .note-card-icon-wrapper{color:var(--color-primary);background:#3b82f61a;border-color:#3b82f64d}.note-card-details{gap:var(--spacing-xs);flex-direction:column;flex:1;min-width:0;display:flex}.note-card-title-row{justify-content:space-between;align-items:center;gap:var(--spacing-md);display:flex}.note-card-name{color:var(--color-text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:1.05rem;font-weight:600;overflow:hidden}.note-card-size{color:var(--color-text-muted);background:var(--color-surface-hover);border-radius:6px;padding:2px 8px;font-size:.75rem;font-weight:500}.note-card-meta{align-items:center;gap:var(--spacing-md);display:flex}.note-type-badge{text-transform:uppercase;letter-spacing:.05em;border-radius:4px;padding:2px 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