:root{--bg: #060010;--surface: #0d001f;--card: #120028;--card-hover: #1a003a;--purple: #8b5cf6;--purple-light: #a78bfa;--cyan: #06b6d4;--cyan-light: #22d3ee;--text: #e2e8f0;--text-muted: #7c8db5;--text-faint: #4a5578;--border: rgba(139, 92, 246, .25);--border-hover: rgba(6, 182, 212, .5);--glow-purple: rgba(139, 92, 246, .12);--glow-cyan: rgba(6, 182, 212, .12);--sidebar-w: 280px;--header-h: 60px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background-color:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;background-image:radial-gradient(1px 1px at 10% 20%,rgba(255,255,255,.6) 0%,transparent 100%),radial-gradient(1px 1px at 30% 70%,rgba(255,255,255,.4) 0%,transparent 100%),radial-gradient(1px 1px at 50% 15%,rgba(255,255,255,.5) 0%,transparent 100%),radial-gradient(1px 1px at 70% 50%,rgba(255,255,255,.3) 0%,transparent 100%),radial-gradient(1px 1px at 85% 30%,rgba(255,255,255,.6) 0%,transparent 100%),radial-gradient(1px 1px at 20% 85%,rgba(255,255,255,.4) 0%,transparent 100%),radial-gradient(1px 1px at 60% 90%,rgba(255,255,255,.3) 0%,transparent 100%),radial-gradient(1px 1px at 90% 80%,rgba(255,255,255,.5) 0%,transparent 100%),radial-gradient(1px 1px at 45% 55%,rgba(255,255,255,.2) 0%,transparent 100%),radial-gradient(1px 1px at 75% 10%,rgba(255,255,255,.5) 0%,transparent 100%)}a{color:var(--cyan);text-decoration:none;transition:color .2s}a:hover{color:var(--cyan-light);text-decoration:underline}.site-header{position:sticky;top:0;z-index:100;height:var(--header-h);background:#060010e6;backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 1.5rem;gap:1rem}.site-logo{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;font-weight:700;color:var(--text);text-decoration:none;white-space:nowrap;flex-shrink:0}.site-logo:hover{color:var(--purple-light);text-decoration:none}.site-logo .logo-icon{font-size:1.4rem}.site-logo .logo-text{background:linear-gradient(90deg,var(--purple-light),var(--cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-search{flex:1;max-width:480px;position:relative}.header-search input{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.45rem 1rem .45rem 2.5rem;color:var(--text);font-size:.9rem;outline:none;transition:border-color .2s,box-shadow .2s}.header-search input::placeholder{color:var(--text-faint)}.header-search input:focus{border-color:var(--purple);box-shadow:0 0 0 3px var(--glow-purple)}.header-search .search-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--text-faint);pointer-events:none;font-size:.9rem}.search-results{display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--card);border:1px solid var(--border);border-radius:8px;max-height:380px;overflow-y:auto;z-index:200;box-shadow:0 8px 32px #00000080}.search-results.open{display:block}.search-result-item{display:block;padding:.65rem 1rem;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border);transition:background .15s}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background:var(--card-hover);color:var(--cyan-light);text-decoration:none}.search-result-item .result-title{font-size:.9rem;font-weight:500}.search-result-item .result-cat{font-size:.75rem;color:var(--text-muted);margin-top:1px}.search-no-results{padding:1rem;text-align:center;color:var(--text-muted);font-size:.9rem}.header-nav{margin-left:auto;display:flex;gap:.75rem;flex-shrink:0}.header-nav a{font-size:.85rem;color:var(--text-muted);padding:.3rem .6rem;border-radius:6px;transition:color .2s,background .2s}.header-nav a:hover{color:var(--text);background:var(--surface);text-decoration:none}.menu-toggle{display:none;background:none;border:none;color:var(--text);cursor:pointer;font-size:1.3rem;padding:.25rem}.hero{text-align:center;padding:5rem 1.5rem 3rem;position:relative}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(139,92,246,.15) 0%,transparent 70%);pointer-events:none}.hero-badge{display:inline-block;font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:var(--cyan);border:1px solid rgba(6,182,212,.3);border-radius:999px;padding:.3rem .9rem;margin-bottom:1.5rem}.hero h1{font-size:clamp(2.2rem,6vw,4rem);font-weight:800;line-height:1.1;margin-bottom:1rem;background:linear-gradient(135deg,var(--purple-light) 0%,var(--cyan-light) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-sub{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--text-muted);max-width:560px;margin:0 auto 2.5rem;line-height:1.7}.hero-stats{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap;margin-bottom:3rem}.hero-stat{text-align:center}.hero-stat .num{font-size:1.6rem;font-weight:700;color:var(--cyan)}.hero-stat .lbl{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}.categories-section{max-width:1200px;margin:0 auto;padding:0 1.5rem 5rem}.section-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--text-faint);margin-bottom:1.5rem;padding-left:.25rem}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}.category-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.5rem;text-decoration:none;color:var(--text);transition:transform .2s,border-color .2s,box-shadow .2s,background .2s;position:relative;overflow:hidden}.category-card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--purple),var(--cyan));opacity:0;transition:opacity .2s}.category-card:hover{transform:translateY(-4px);border-color:var(--border-hover);box-shadow:0 8px 32px #06b6d426;background:var(--card-hover);text-decoration:none;color:var(--text)}.category-card:hover:before{opacity:1}.card-icon{font-size:2rem;margin-bottom:.75rem;line-height:1}.card-number{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--purple-light);margin-bottom:.35rem}.card-title{font-size:1rem;font-weight:600;margin-bottom:.5rem;line-height:1.3}.card-desc{font-size:.85rem;color:var(--text-muted);line-height:1.5;flex:1}.card-count{margin-top:1rem;font-size:.75rem;color:var(--text-faint)}.note-layout{display:flex;min-height:calc(100vh - var(--header-h))}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);padding:1.5rem 0;position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.sidebar-header{padding:0 1.25rem 1rem;border-bottom:1px solid var(--border);margin-bottom:1rem}.sidebar-back{display:flex;align-items:center;gap:.4rem;font-size:.78rem;color:var(--text-muted);text-decoration:none;margin-bottom:.75rem;transition:color .15s}.sidebar-back:hover{color:var(--cyan);text-decoration:none}.sidebar-cat-title{font-size:.85rem;font-weight:700;color:var(--purple-light);line-height:1.3}.sidebar-group{margin-bottom:.5rem}.sidebar-group-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint);padding:.5rem 1.25rem .3rem}.sidebar-link{display:block;padding:.45rem 1.25rem;font-size:.85rem;color:var(--text-muted);text-decoration:none;border-left:2px solid transparent;transition:color .15s,border-color .15s,background .15s;line-height:1.4}.sidebar-link:hover{color:var(--text);background:var(--glow-purple);text-decoration:none}.sidebar-link.active{color:var(--cyan-light);border-left-color:var(--cyan);background:var(--glow-cyan);font-weight:500}.note-main{flex:1;min-width:0;padding:2.5rem clamp(1.5rem,5vw,4rem)}.note-breadcrumb{font-size:.8rem;color:var(--text-faint);margin-bottom:2rem;display:flex;align-items:center;gap:.4rem;flex-wrap:wrap}.note-breadcrumb a{color:var(--text-muted)}.note-breadcrumb a:hover{color:var(--cyan)}.note-breadcrumb .sep{color:var(--text-faint)}.note-content{max-width:72ch;line-height:1.85;color:var(--text)}.note-content h1{font-size:clamp(1.6rem,4vw,2.2rem);font-weight:800;line-height:1.2;margin-bottom:1.5rem;background:linear-gradient(135deg,var(--text) 60%,var(--purple-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.note-content h2{font-size:1.3rem;font-weight:700;color:var(--purple-light);margin:2.5rem 0 .75rem;padding-bottom:.4rem;border-bottom:1px solid var(--border)}.note-content h3{font-size:1.05rem;font-weight:600;color:var(--cyan-light);margin:1.75rem 0 .5rem}.note-content h4{font-size:.95rem;font-weight:600;color:var(--text-muted);margin:1.5rem 0 .4rem}.note-content p{margin-bottom:1.1rem}.note-content ul,.note-content ol{padding-left:1.5rem;margin-bottom:1.1rem}.note-content li{margin-bottom:.35rem}.note-content a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(6,182,212,.3);transition:color .15s,border-color .15s}.note-content a:hover{color:var(--cyan-light);border-bottom-color:var(--cyan-light);text-decoration:none}.note-content blockquote{border-left:3px solid var(--purple);margin:1.5rem 0;padding:.75rem 1.25rem;background:var(--glow-purple);border-radius:0 8px 8px 0;color:var(--text-muted);font-style:italic}.note-content blockquote p{margin:0}.note-content code{font-family:Fira Code,Cascadia Code,Consolas,monospace;background:#8b5cf61f;border:1px solid var(--border);border-radius:4px;padding:.15em .4em;font-size:.85em;color:var(--purple-light)}.note-content pre{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:1.25rem;overflow-x:auto;margin-bottom:1.1rem}.note-content pre code{background:none;border:none;padding:0;font-size:.88rem;color:var(--text)}.note-content strong{color:var(--text);font-weight:600}.note-content em{color:var(--text-muted);font-style:italic}.note-content hr{border:none;border-top:1px solid var(--border);margin:2rem 0}.note-content table{width:100%;border-collapse:collapse;margin-bottom:1.5rem;font-size:.9rem}.note-content th{background:var(--surface);padding:.6rem .9rem;text-align:left;font-weight:600;color:var(--purple-light);border:1px solid var(--border);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}.note-content td{padding:.55rem .9rem;border:1px solid var(--border);color:var(--text);vertical-align:top}.note-content tr:nth-child(2n) td{background:#8b5cf60a}.note-content tr:hover td{background:var(--glow-purple)}.cat-page{max-width:900px;margin:0 auto;padding:3rem 1.5rem 5rem}.cat-hero{margin-bottom:3rem}.cat-icon{font-size:3rem;margin-bottom:1rem}.cat-hero h1{font-size:clamp(1.8rem,4vw,2.5rem);font-weight:800;background:linear-gradient(135deg,var(--purple-light),var(--cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.cat-hero p{color:var(--text-muted);font-size:1rem}.note-list{list-style:none}.note-list-group{margin-bottom:2rem}.note-list-group-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint);margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}.note-list-item a{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:8px;color:var(--text);text-decoration:none;border:1px solid transparent;transition:background .15s,border-color .15s}.note-list-item a:hover{background:var(--card);border-color:var(--border);text-decoration:none}.note-list-item a:hover .note-list-title{color:var(--cyan-light)}.note-list-item .arrow{color:var(--text-faint);font-size:.8rem;margin-left:auto}.note-list-title{font-size:.95rem;font-weight:500}.site-footer{border-top:1px solid var(--border);padding:2rem 1.5rem;text-align:center;color:var(--text-faint);font-size:.8rem}.site-footer a{color:var(--text-faint)}.site-footer a:hover{color:var(--cyan)}@media (max-width: 768px){.note-layout{flex-direction:column}.sidebar{width:100%;height:auto;position:static;border-right:none;border-bottom:1px solid var(--border);display:none}.sidebar.open,.menu-toggle{display:block}.header-search{max-width:none}.header-nav{display:none}.hero{padding:3rem 1.5rem 2rem}.note-main{padding:1.5rem}.hero-stats{gap:1rem}}@media (max-width: 480px){.cards-grid{grid-template-columns:1fr 1fr}.hero h1{font-size:1.8rem}}