:root{--ink: #0f172a;--ink-2: #334155;--ink-3: #64748b;--ink-4: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--accent-bg: rgba(79,70,229,.06);--surface: #ffffff;--bg: #f8fafc;--bg-elevated: #f1f5f9;--border: #e2e8f0;--border-light: #f1f5f9;--success: #059669;--success-bg: rgba(5,150,105,.08);--warning: #d97706;--warning-bg: rgba(217,119,6,.08);--danger: #dc2626;--danger-bg: rgba(220,38,38,.08);--font: "Inter", system-ui, -apple-system, sans-serif;--mono: "JetBrains Mono", "SF Mono", "Cascadia Code", "Fira Mono", monospace;--container: 1200px;--r: 16px;--r-sm: 10px;--r-pill: 999px;--shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.03);--shadow: 0 2px 8px rgba(0,0,0,.05), 0 1px 3px rgba(0,0,0,.04);--shadow-lg: 0 8px 24px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.04);--shadow-hover: 0 12px 32px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.05)}html.dark{--ink: #f1f5f9;--ink-2: #cbd5e1;--ink-3: #94a3b8;--ink-4: #64748b;--accent: #818cf8;--accent-hover: #a5b4fc;--accent-bg: rgba(129,140,248,.1);--surface: #0f172a;--bg: #020617;--bg-elevated: #1e293b;--border: #1e293b;--border-light: #1e293b;--success: #34d399;--success-bg: rgba(52,211,153,.1);--warning: #fbbf24;--warning-bg: rgba(251,191,36,.1);--danger: #f87171;--danger-bg: rgba(248,113,113,.1);--shadow-sm: 0 1px 2px rgba(0,0,0,.2);--shadow: 0 2px 8px rgba(0,0,0,.25);--shadow-lg: 0 8px 24px rgba(0,0,0,.3);--shadow-hover: 0 12px 32px rgba(0,0,0,.35)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-text-size-adjust:100%;overflow-x:hidden;scrollbar-gutter:stable}body{overflow-x:hidden}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased}html.dark body{color-scheme:dark}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover);text-decoration:underline}img{max-width:100%;display:block}table{width:100%;border-collapse:collapse}.container{max-width:var(--container);width:100%;margin:0 auto;padding-left:24px;padding-right:24px}.site-header{position:sticky;top:0;z-index:100;background:#f8fafccc;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}html.dark .site-header{background:#020617cc}.header-inner{max-width:var(--container);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:56px}.header-left{display:flex;align-items:center;gap:32px}.header-actions{display:flex;align-items:center;gap:8px}.theme-toggle{background:none;border:1px solid var(--border);border-radius:var(--r-sm);cursor:pointer;padding:7px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);transition:color .15s,border-color .15s,background .15s}.theme-toggle:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-bg)}.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.theme-toggle svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.theme-toggle .icon-sun{display:none}.theme-toggle .icon-moon,html.dark .theme-toggle .icon-sun{display:block}html.dark .theme-toggle .icon-moon{display:none}.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;margin:-8px}.menu-icon{display:block;width:22px;height:2px;background:var(--ink);position:relative;transition:background .2s}.menu-icon:before,.menu-icon:after{content:"";position:absolute;left:0;width:22px;height:2px;background:var(--ink);transition:transform .2s}.menu-icon:before{top:-6px}.menu-icon:after{top:6px}.menu-toggle[aria-expanded=true] .menu-icon{background:transparent}.menu-toggle[aria-expanded=true] .menu-icon:before{transform:translateY(6px) rotate(45deg)}.menu-toggle[aria-expanded=true] .menu-icon:after{transform:translateY(-6px) rotate(-45deg)}.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none}.logo:hover{text-decoration:none}.logo:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px}.logo-mark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:linear-gradient(135deg,#6366f1,#4f46e5);color:#fff;border-radius:10px;box-shadow:0 2px 8px #4f46e54d}.logo-mark svg{width:18px;height:18px;fill:currentColor}.logo-text{font-size:1.25rem;font-weight:700;color:var(--ink);letter-spacing:0}.logo-accent{color:var(--accent)}.logo-tld{color:var(--ink-4);font-weight:600;font-size:.85em}.header-nav{display:flex;align-items:center;gap:4px;background:var(--bg-elevated);padding:3px;border-radius:var(--r-pill)}.header-nav a{display:block;padding:6px 14px;font-size:.8125rem;font-weight:500;color:var(--ink-3);text-decoration:none;border-radius:var(--r-pill);transition:color .15s,background .15s}.header-nav a:hover{color:var(--ink);background:var(--surface);text-decoration:none}.header-nav a:focus-visible{outline:2px solid var(--accent);outline-offset:-2px;border-radius:var(--r-pill)}.header-nav a.active{color:var(--accent);background:var(--surface);font-weight:600;box-shadow:var(--shadow-sm)}.hero-section{padding:48px 24px 40px;text-align:center}.hero-eyebrow{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-4);margin-bottom:12px}.hero-ip-value{font-family:var(--mono);font-size:clamp(2.5rem,7vw,4rem);font-weight:700;line-height:1;color:var(--ink);letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-bottom:16px;word-break:break-all}html.dark .hero-ip-value{text-shadow:0 0 40px rgba(129,140,248,.15)}.hero-copy-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;font-size:.875rem;font-weight:600;font-family:var(--font);color:#fff;background:var(--accent);border:none;border-radius:var(--r-pill);cursor:pointer;transition:background .15s,transform .15s}.hero-copy-btn:hover{background:var(--accent-hover);transform:translateY(-1px)}.hero-copy-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.hero-copy-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.hero-subtitle{font-size:.9375rem;color:var(--ink-3);margin-top:12px}.geo-grid{max-width:var(--container);margin:0 auto;padding:0 24px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.geo-tile{background:var(--surface);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);text-align:center;transition:box-shadow .2s,transform .2s}.geo-tile:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.geo-tile-label{font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-4);margin-bottom:6px}.geo-tile-value{font-size:1rem;font-weight:700;color:var(--ink);line-height:1.3;word-break:break-word}.geo-tile-value.accent{color:var(--accent)}.geo-tile-value.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}.map-section{max-width:var(--container);margin:0 auto;padding:0 24px 32px}.map-card{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}.map-card-head{padding:16px 20px;font-size:.875rem;font-weight:700;color:var(--ink);border-bottom:1px solid var(--border-light)}#map{height:350px;width:100%}.system-grid{max-width:var(--container);margin:0 auto;padding:0 24px 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.system-tile{background:var(--surface);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);text-align:center}.system-tile-label{font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-4);margin-bottom:6px}.system-tile-value{font-size:.9375rem;font-weight:700;color:var(--ink);line-height:1.3}.faq-section{max-width:var(--container);margin:0 auto;padding:0 24px 32px}.faq-section h2{font-size:1.25rem;font-weight:700;color:var(--ink);margin-bottom:16px}.faq-list{display:flex;flex-direction:column;gap:8px}.faq-item{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow-sm);overflow:hidden}.faq-item summary{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;font-size:.9375rem;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;user-select:none;transition:color .15s}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:hover{color:var(--accent)}.faq-chevron{width:20px;height:20px;fill:none;stroke:var(--ink-4);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s;flex-shrink:0}.faq-item[open] .faq-chevron{transform:rotate(180deg)}.faq-answer{padding:0 20px 16px;font-size:.9375rem;color:var(--ink-2);line-height:1.75}.articles-section{max-width:var(--container);margin:0 auto;padding:0 24px 32px}.articles-section h2{font-size:1.25rem;font-weight:700;color:var(--ink);margin-bottom:16px}.articles-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.article-card{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s,transform .2s}.article-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.article-card a{display:block;text-decoration:none;padding:20px 24px}.article-card a:hover{text-decoration:none}.article-card-tag{display:inline-block;padding:3px 10px;font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;border-radius:var(--r-pill);margin-bottom:10px;color:var(--accent);background:var(--accent-bg)}.article-card-title{font-size:1.0625rem;font-weight:700;color:var(--ink);line-height:1.4;margin-bottom:8px}.article-card a:hover .article-card-title{color:var(--accent)}.article-card-excerpt{font-size:.875rem;color:var(--ink-3);line-height:1.65}.lookup-section{max-width:640px;margin:0 auto;padding:0 24px 32px}.lookup-form{display:flex;gap:10px;margin-bottom:24px}.lookup-input{flex:1;padding:12px 16px;font-size:1rem;font-family:var(--mono);border:2px solid var(--border);border-radius:var(--r);color:var(--ink);background:var(--surface);transition:border-color .15s,box-shadow .15s}.lookup-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.lookup-input::placeholder{color:var(--ink-4)}.lookup-btn{padding:12px 24px;font-size:.9375rem;font-weight:700;font-family:var(--font);color:#fff;background:var(--accent);border:none;border-radius:var(--r);cursor:pointer;transition:background .15s;white-space:nowrap}.lookup-btn:hover{background:var(--accent-hover)}.lookup-btn:disabled{opacity:.6;cursor:not-allowed}.lookup-result{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:24px}.lookup-error{color:var(--danger);font-size:.875rem;margin-bottom:16px}.breadcrumbs{max-width:var(--container);margin:0 auto;padding:16px 24px 0}.breadcrumbs ol{list-style:none;display:flex;align-items:center;gap:8px;font-size:.8125rem}.breadcrumbs li{display:flex;align-items:center;gap:8px;color:var(--ink-4)}.breadcrumbs a{color:var(--ink-3);text-decoration:none;transition:color .15s}.breadcrumbs a:hover{color:var(--accent);text-decoration:none}.breadcrumbs .separator{color:var(--ink-4)}.section{max-width:var(--container);margin:0 auto;padding:0 24px 32px}.page-header{max-width:var(--container);margin:0 auto;padding:40px 24px 32px}.page-header h1{font-size:1.75rem;font-weight:800;color:var(--ink);letter-spacing:-.01em}.page-header p{font-size:.9375rem;color:var(--ink-3);margin-top:6px}.prose{padding:24px 0;line-height:1.8}.prose h1{font-size:1.75rem;font-weight:800;color:var(--ink);letter-spacing:-.01em;margin-bottom:8px}.prose h2{font-size:1.25rem;font-weight:700;color:var(--ink);margin-top:32px;margin-bottom:10px}.prose h2:first-child{margin-top:0}.prose h3{font-size:1.0625rem;font-weight:700;color:var(--ink);margin-top:28px;margin-bottom:8px;padding-top:20px;border-top:1px solid var(--border-light)}.prose h3:first-child{margin-top:0;padding-top:0;border-top:none}.prose p{font-size:.9375rem;color:var(--ink-2);margin-bottom:14px}.prose p:last-child{margin-bottom:0}.prose strong{color:var(--ink);font-weight:600}.prose ul,.prose ol{margin-bottom:14px;padding-left:24px}.prose li{font-size:.9375rem;color:var(--ink-2);margin-bottom:6px;line-height:1.75}.prose a{color:var(--accent);text-decoration:underline}.prose a:hover{color:var(--accent-hover)}.prose blockquote{border-left:3px solid var(--accent);padding:12px 20px;margin:20px 0;background:var(--accent-bg);border-radius:0 var(--r-sm) var(--r-sm) 0;font-style:italic;color:var(--ink-3)}.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.875rem}.prose th,.prose td{padding:8px 14px;text-align:left;border-bottom:1px solid var(--border-light)}.prose th{background:var(--bg-elevated);font-weight:600;color:var(--ink-2);border-bottom-color:var(--border)}.site-footer{background:var(--surface);color:var(--ink-3);border-top:1px solid var(--border);margin-top:32px}.footer-inner{max-width:var(--container);margin:0 auto;padding:0 24px}.footer-grid{padding:48px 0 40px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;border-bottom:1px solid var(--border-light)}.footer-brand{font-size:.875rem;line-height:1.7}.footer-logo{font-size:1.125rem;font-weight:700;color:var(--ink);display:block;margin-bottom:12px;letter-spacing:0;text-decoration:none}.footer-logo:hover{color:var(--ink);text-decoration:none}.footer-logo span{color:var(--accent)}.footer-tld{color:var(--ink-4);font-weight:500;font-size:.85em}.footer-col h4{font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-4);margin-bottom:16px}.footer-col ul{list-style:none}.footer-col li{margin-bottom:10px}.footer-col a{color:var(--ink-3);font-size:.875rem;transition:color .15s;text-decoration:none}.footer-col a:hover{color:var(--accent);text-decoration:none}.footer-bottom{padding:20px 0;display:flex;justify-content:space-between;align-items:center;font-size:.75rem;color:var(--ink-4)}.skip-link{position:absolute;top:-100%;left:16px;z-index:200;padding:8px 16px;font-size:.875rem;font-weight:600;color:#fff;background:var(--accent);border-radius:var(--r-sm);text-decoration:none}.skip-link:focus{top:8px;color:#fff;text-decoration:none}.intro-section{max-width:var(--container);margin:0 auto;padding:0 24px 32px}.intro-section h2{font-size:1.25rem;font-weight:700;color:var(--ink);margin-bottom:16px}.intro-content{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:32px}.intro-content h3{font-size:1.0625rem;font-weight:700;color:var(--ink);margin-top:24px;margin-bottom:8px}.intro-content h3:first-child{margin-top:0}.intro-content p{font-size:.9375rem;color:var(--ink-2);line-height:1.8;margin-bottom:14px}.intro-content p:last-child{margin-bottom:0}.intro-content a{color:var(--accent);text-decoration:underline}.intro-content a:hover{color:var(--accent-hover)}html.dark .logo-mark{background:linear-gradient(135deg,#818cf8,#6366f1);box-shadow:0 2px 8px #818cf84d}html.dark .logo-accent{color:#818cf8}@media(max-width:1024px){.geo-grid,.system-grid{grid-template-columns:repeat(2,1fr)}.articles-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.intro-content{padding:24px}}@media(max-width:768px){.hero-section{padding:32px 16px 28px}.geo-grid,.map-section{padding:0 16px 24px}.system-grid{padding:0 16px 24px;grid-template-columns:1fr}.faq-section,.articles-section,.lookup-section,.section{padding:0 16px 24px}.page-header{padding:28px 16px 20px}.breadcrumbs{padding:12px 16px 0}.container{padding-left:16px;padding-right:16px}.header-inner,.footer-inner{padding:0 16px}.hero-ip-value{font-size:clamp(2rem,9vw,3rem)}.menu-toggle{display:block}.header-left{flex-direction:column;align-items:flex-start;gap:0}.header-inner{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:12px}.header-nav{display:none;flex-direction:column;width:100%;padding:8px 0;margin-top:8px;background:transparent;border-radius:0;gap:2px}.header-nav.is-open{display:flex}.header-nav a{padding:10px 16px;font-size:.875rem;border-radius:var(--r-sm)}.footer-grid{grid-template-columns:1fr;gap:24px;padding:32px 0}.footer-bottom{flex-direction:column;gap:6px;text-align:center}.intro-section{padding:0 16px 24px}.intro-content{padding:20px}.lookup-form{flex-direction:column}#map{height:260px}}@media(max-width:480px){.hero-ip-value{font-size:1.75rem}.logo-text{font-size:1.125rem}.logo-mark{width:28px;height:28px;border-radius:8px}.geo-grid{grid-template-columns:1fr 1fr;gap:10px}.geo-tile{padding:14px}}