:root{--color-bg-primary: #ffffff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #f1f5f9;--color-surface: rgba(241, 245, 249, .8);--color-surface-hover: rgba(226, 232, 240, .9);--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 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .05);--shadow-glow: 0 0 20px rgba(59, 130, 246, .25);--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: rgba(30, 41, 59, .8);--color-surface-hover: rgba(51, 65, 85, .9);--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 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(59, 130, 246, .3)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--color-text-primary);background:var(--color-bg-primary);min-height:100vh;overflow-x:hidden;transition:background-color var(--transition-slow),color var(--transition-slow)}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);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--navbar-height);transition:all var(--transition-slow)}.nav-container{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);height:100%;display:flex;justify-content:space-between;align-items:center}.nav-brand{display:flex;align-items:center;gap:var(--spacing-sm);font-size:1.5rem;font-weight:800;letter-spacing:-.025em;color:var(--color-text-primary);cursor:pointer;transition:transform var(--transition-base)}.nav-brand:hover{transform:scale(1.02)}.nav-brand svg{filter:drop-shadow(0 0 10px rgba(59,130,246,.4))}.nav-toggle{display:none;flex-direction:column;background:var(--color-bg-tertiary);border:1px solid var(--color-border);cursor:pointer;padding:var(--spacing-sm);border-radius:var(--radius-md);gap:4px;width:40px;height:40px;justify-content:center;align-items:center;transition:all var(--transition-base)}.nav-toggle:hover{background:var(--color-surface-hover);border-color:var(--color-primary)}.nav-toggle span{width:20px;height:2px;background:var(--color-text-primary);border-radius:2px;transition:all var(--transition-slow)}.nav-toggle.active span:nth-child(1){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{display:flex;list-style:none;gap:var(--spacing-xs);align-items:center}.nav-link{color:var(--color-text-secondary);text-decoration:none;padding:var(--spacing-sm) var(--spacing-lg);transition:all var(--transition-base);border-radius:var(--radius-md);font-weight:600;font-size:.9375rem;cursor:pointer;background:none;border:none;font-family:inherit;position:relative;display:flex;align-items:center;gap:var(--spacing-sm)}.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:"";position:absolute;bottom:0;left:20%;right:20%;height:3px;background:var(--gradient-primary);border-radius:3px 3px 0 0;animation:scaleInX .3s ease}@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);width:40px;height:40px;border-radius:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-base);margin-left:var(--spacing-sm)}.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{display:flex;align-items:center;gap:var(--spacing-sm)}.sidebar{position:fixed;top:var(--navbar-height);left:0;right:0;background:var(--color-bg-secondary);max-height:0;overflow:hidden;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)}.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);text-decoration:none;padding:var(--spacing-md) var(--spacing-xl);display:flex;align-items:center;gap:var(--spacing-sm);transition:background-color var(--transition-base);font-weight:500;border:none;background:none;width:100%;cursor:pointer;font-size:1rem;font-family:inherit}.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;margin:0 auto;padding:0 var(--spacing-md)}.hero-section{text-align:center;padding:var(--spacing-2xl) 0;margin-bottom:var(--spacing-2xl)}.hero-title{margin-bottom:var(--spacing-md);animation:fadeInUp .6s ease}.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{color:var(--color-text-secondary);font-size:clamp(1rem,2.5vw,1.25rem);margin-bottom:var(--spacing-xl);animation:fadeInUp .6s ease .2s both}.hero-stats{display:flex;justify-content:center;gap:var(--spacing-2xl);flex-wrap:wrap;animation:fadeInUp .6s ease .4s both}.stat-item{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.stat-value{font-size:clamp(1.5rem,4vw,2.5rem);font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{color:var(--color-text-muted);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-xl)}.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;display:flex;align-items:center;gap:var(--spacing-sm);transition:all var(--transition-base);font-weight:500;font-size:.875rem}.btn:hover{background:var(--color-surface-hover);border-color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.btn-primary{background:var(--gradient-primary);border:none;color:#fff}.btn-primary:hover{box-shadow:var(--shadow-glow)}.repositories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.repo-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-lg);cursor:pointer;transition:all var(--transition-base);animation:fadeIn .4s ease}.repo-card:hover{transform:translateY(-5px);border-color:var(--color-primary);box-shadow:var(--shadow-glow)}.repo-header{display:flex;align-items:flex-start;gap:var(--spacing-md);margin-bottom:var(--spacing-md)}.repo-icon{width:48px;height:48px;background:var(--gradient-primary);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.5rem}.repo-info{flex:1}.repo-name{font-size:1.125rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-xs)}.repo-owner{font-size:.875rem;color:var(--color-text-muted)}.repo-description{color:var(--color-text-secondary);font-size:.875rem;margin-bottom:var(--spacing-md);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.repo-stats{display:flex;gap:var(--spacing-lg);font-size:.875rem;color:var(--color-text-muted)}.repo-stat{display:flex;align-items:center;gap:var(--spacing-xs)}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-xl);margin-top:var(--spacing-xl);perspective:1000px}.subject-card{position:relative;background:var(--color-surface);border:1px solid var(--color-border);border-radius:20px;padding:var(--spacing-xl);cursor:pointer;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;flex-direction:column;gap:var(--spacing-lg);overflow:hidden;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.subject-card-glow{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 50% -20%,var(--color-primary-light),transparent 70%);opacity:0;transition:opacity .4s ease;pointer-events:none}.subject-card:hover{transform:translateY(-8px);border-color:var(--color-primary);box-shadow:0 20px 40px #0003}.subject-card:hover .subject-card-glow{opacity:.15}.subject-header{display:flex;justify-content:space-between;align-items:flex-start}.subject-icon-container{width:54px;height:54px;background:var(--color-surface-light);border:1px solid var(--color-border);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.75rem;transition:all .3s ease}.subject-card:hover .subject-icon-container{background:var(--color-primary);border-color:var(--color-primary);transform:scale(1.1) rotate(-5deg);box-shadow:0 0 20px var(--color-primary-light)}.subject-badge{background:#3b82f61a;color:var(--color-primary);padding:6px 12px;border-radius:20px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;border:1px solid rgba(59,130,246,.2)}.subject-body{display:flex;flex-direction:column;gap:var(--spacing-xs)}.subject-name{font-size:1.35rem;font-weight:700;color:var(--color-text-primary);margin:0;text-transform:capitalize}.subject-description{font-size:.9375rem;color:var(--color-text-secondary);line-height:1.5;margin:0;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.subject-footer{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:var(--spacing-md);border-top:1px solid var(--color-border)}.study-action{font-size:.875rem;font-weight:600;color:var(--color-primary);opacity:.8;transition:opacity .3s ease}.subject-card:hover .study-action{opacity:1}.subject-arrow{color:var(--color-primary);transition:transform .3s ease}.subject-card:hover .subject-arrow{transform:translate(4px)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;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;animation:fadeIn .5s ease}.empty-icon{font-size:3.5rem;margin-bottom:var(--spacing-lg);filter:grayscale(.5);opacity:.6}.empty-state p{font-size:1.1rem;font-weight:500}.about-container{max-width:1000px;margin:0 auto;padding-bottom:var(--spacing-2xl);animation:fadeIn .6s ease}.about-hero{text-align:center;padding:var(--spacing-2xl) 0;margin-bottom:var(--spacing-2xl);position:relative}.about-title{font-size:clamp(2.5rem,8vw,4rem);font-weight:900;margin-bottom:var(--spacing-md);letter-spacing:-.05em;line-height:1.1}.about-subtitle{font-size:1.25rem;color:var(--color-text-secondary);max-width:600px;margin:0 auto var(--spacing-xl);line-height:1.6}.about-hero-badge{display:inline-block;padding:6px 16px;background:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:20px;font-size:.8125rem;font-weight:700;color:var(--color-primary);text-transform:uppercase;letter-spacing:.1em}.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-2xl)}.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{transform:translateY(-8px);border-color:var(--color-primary);box-shadow:0 10px 30px #3b82f626}.feature-icon-wrapper{width:56px;height:56px;background:var(--gradient-primary);color:#fff;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto var(--spacing-lg);box-shadow:0 8px 16px #3b82f633}.about-feature-card h3{font-size:1.25rem;margin-bottom:var(--spacing-sm)}.about-feature-card p{font-size:.9375rem;color:var(--color-text-secondary);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{font-size:1.125rem;line-height:1.8;color:var(--color-text-secondary);margin-bottom:var(--spacing-xl)}.mission-quote{font-size:1.5rem;font-weight:600;font-style:italic;color:var(--color-primary);border-left:4px solid var(--color-primary);padding-left:var(--spacing-lg);margin:var(--spacing-xl) 0}.footer{border-top:1px solid var(--color-border);padding:var(--spacing-xl) 0;margin-top:var(--spacing-3xl);background:var(--color-surface);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.footer-container{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl)}.footer-content{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:var(--spacing-md);color:var(--color-text-secondary);text-align:center}.footer-copyright{display:flex;align-items:center;gap:var(--spacing-sm);font-size:.9375rem;font-weight:500}.author-link{color:var(--color-primary);font-weight:700;text-decoration:none;transition:all var(--transition-base);border-bottom:2px solid transparent}.author-link:hover{border-bottom-color:var(--color-primary);filter:brightness(1.2)}.footer-copyright .dot{opacity:.4}.search-container{position:relative;margin-bottom:var(--spacing-xl)}.search-icon{position:absolute;left:var(--spacing-md);top:50%;transform:translateY(-50%);color:var(--color-text-muted);pointer-events:none}.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);font-size:1rem;transition:all var(--transition-base)}.search-input:focus{outline:none;border-color:var(--color-primary);box-shadow:var(--shadow-glow)}.search-input::placeholder{color:var(--color-text-muted)}.notes-list{display:flex;flex-direction:column;gap:var(--spacing-md);margin-top:var(--spacing-xl)}.note-item-card{display:flex;align-items:center;background:var(--color-surface);border:1px solid var(--color-border);border-radius:16px;padding:var(--spacing-lg);cursor:pointer;transition:all .3s cubic-bezier(.23,1,.32,1);gap:var(--spacing-lg);position:relative;overflow:hidden}.note-item-card:hover{background:var(--color-surface-light);border-color:var(--color-primary);transform:translate(8px);box-shadow:0 10px 20px #0000001a}.note-item-card:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:0;background:var(--color-primary);border-radius:0 4px 4px 0;transition:height .3s ease}.note-item-card:hover:before{height:50%}.note-card-icon-wrapper{width:48px;height:48px;background:var(--color-surface-light);border:1px solid var(--color-border);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary);transition:all .3s ease}.note-item-card:hover .note-card-icon-wrapper{background:#3b82f61a;color:var(--color-primary);border-color:#3b82f64d}.note-card-details{flex:1;display:flex;flex-direction:column;gap:var(--spacing-xs);min-width:0}.note-card-title-row{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md)}.note-card-name{font-weight:600;font-size:1.05rem;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.note-card-size{font-size:.75rem;color:var(--color-text-muted);font-weight:500;background:var(--color-surface-hover);padding:2px 8px;border-radius:6px}.note-card-meta{display:flex;align-items:center;gap:var(--spacing-md)}.note-type-badge{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:2px 6px;border-radius:4px}.type-folder{color:#d1b464;background:#d1b4641a}.type-pdf{color:#e57373;background:#e573731a}.type-code{color:#64b5f6;background:#64b5f61a}.type-text{color:var(--color-text-muted);background:var(--color-surface-hover)}.note-path{font-size:.8rem;color:var(--color-text-muted);opacity:.9}.note-card-action{color:var(--color-primary);opacity:0;transform:translate(-10px);transition:all .3s ease}.note-item-card:hover .note-card-action{opacity:1;transform:translate(0)}.note-content{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-2xl);line-height:1.8}.note-content h1,.note-content h2,.note-content h3,.note-content h4{color:var(--color-text-primary);margin-top:var(--spacing-xl);margin-bottom:var(--spacing-md)}.note-content h1:first-child,.note-content h2:first-child{margin-top:0}.note-content p{margin-bottom:var(--spacing-md);color:var(--color-text-secondary)}.note-content a{color:var(--color-primary);text-decoration:none}.note-content a:hover{text-decoration:underline}.note-content code{background:var(--color-bg-tertiary);color:var(--color-primary);padding:2px 6px;border-radius:var(--radius-sm);font-size:.875em;font-family:Courier New,monospace}.note-content pre{background:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);overflow-x:auto;margin:var(--spacing-md) 0}.note-content pre code{background:none;color:var(--color-text-primary);padding:0}.note-content ul,.note-content ol{margin-left:var(--spacing-xl);margin-bottom:var(--spacing-md);color:var(--color-text-secondary)}.note-content blockquote{border-left:4px solid var(--color-primary);padding-left:var(--spacing-md);margin:var(--spacing-md) 0;color:var(--color-text-secondary);font-style:italic}.note-content table{width:100%;border-collapse:collapse;margin:var(--spacing-md) 0}.note-content th,.note-content td{border:1px solid var(--color-border);padding:var(--spacing-sm) var(--spacing-md);text-align:left}.note-content th{background:var(--color-bg-tertiary);font-weight:600}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);gap:var(--spacing-md)}.spinner{width:48px;height:48px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);gap:var(--spacing-md);color:var(--color-text-secondary)}.error-state svg{color:#ef4444}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:2000;padding:var(--spacing-md);animation:fadeIn .2s ease}.modal-content{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-xl);max-width:500px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-lg);border-bottom:1px solid var(--color-border)}.modal-close{background:none;border:none;color:var(--color-text-secondary);cursor:pointer;padding:var(--spacing-sm);border-radius:var(--radius-md);transition:all var(--transition-base)}.modal-close:hover{background:var(--color-surface);color:var(--color-text-primary)}.modal-body{padding:var(--spacing-lg)}.cache-stats{display:grid;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.cache-stat{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:var(--color-surface);border-radius:var(--radius-md)}.cache-stat-label{color:var(--color-text-secondary)}.cache-stat-value{color:var(--color-text-primary);font-weight:700;font-size:1.25rem}.note-navigation{display:flex;justify-content:space-between;align-items:center;margin-top:var(--spacing-xl);padding:var(--spacing-lg);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.nav-index{font-size:.875rem;color:var(--color-text-secondary);font-weight:500}.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.math-block{margin:2rem 0;overflow-x:auto;overflow-y:hidden;display:flex;justify-content:center;padding:var(--spacing-md);background:rgba(var(--color-primary-rgb),.03);border-radius:var(--radius-lg)}.math-inline{padding:0 4px;vertical-align:middle}.math-error{color:#ef4444;background:#ef44441a;padding:2px 6px;border-radius:4px;font-family:monospace}.disabled-link{color:var(--color-text-secondary);opacity:.9;cursor:default}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted)}@media (max-width: 768px){.navbar .theme-toggle{display:none}.nav-toggle{display:flex}.nav-menu{display:none}.nav-container{padding:0 var(--spacing-md)}.nav-brand{font-size:1.25rem}.container{padding:0 var(--spacing-sm)}.main-content{padding:var(--spacing-lg) var(--spacing-sm)}.repositories-grid{grid-template-columns:1fr}.section-header{flex-direction:column;align-items:flex-start;gap:var(--spacing-md)}}@media (max-width: 480px){.hero-stats{flex-direction:column;gap:var(--spacing-md)}.repo-card,.note-content{padding:var(--spacing-md)}}