:root{--ink:#081526;--ink-2:#13263d;--paper:#f6f9fb;--white:#fff;--mint:#3ee6bf;--mint-dark:#087b68;--sky:#b8d8ff;--line:#dce6ee;--muted:#5b6b7c;--danger:#b42318;--shadow:0 24px 70px rgba(4,21,39,.12);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));background:rgba(246,249,251,.9);border-bottom:1px solid var(--line);backdrop-filter:blur(18px);position:sticky;top:0;z-index:20}.brand{display:inline-flex;align-items:center;gap:10px;font-size:1.12rem;font-weight:800;letter-spacing:-.02em}.brand-mark{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--ink);color:var(--mint);font-size:1.45rem}.brand-logo{width:32px;height:32px;display:block;border-radius:10px}.site-nav{display:flex;align-items:center;gap:30px}.site-nav a{color:#405166;font-weight:650;font-size:.94rem}.site-nav a:hover,.site-nav a:focus-visible,.site-nav a.active{color:var(--ink)}.menu-button{display:none;border:1px solid var(--line);background:var(--white);border-radius:9px;padding:8px 12px;color:var(--ink)}main{overflow:hidden}.tool-hero{min-height:490px;background:var(--ink);color:var(--white);padding:82px max(24px,calc((100vw - 1000px)/2)) 72px;position:relative}.tool-hero:after{content:"";position:absolute;width:380px;height:380px;border:1px solid rgba(62,230,191,.18);border-radius:50%;right:-90px;top:-140px;box-shadow:0 0 0 65px rgba(62,230,191,.035),0 0 0 130px rgba(62,230,191,.025)}.eyebrow,.kicker{text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;font-weight:800}.eyebrow{color:#c5d2df;display:flex;align-items:center;gap:9px}.pulse{width:9px;height:9px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 6px rgba(62,230,191,.12)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.1rem,5vw,4.35rem);line-height:1.03;letter-spacing:-.055em;margin:16px 0 24px;max-width:820px}h2{font-size:clamp(1.65rem,3vw,2.45rem);line-height:1.12;letter-spacing:-.04em}.ip-readout{display:flex;align-items:center;gap:16px;position:relative;z-index:1}.ip-value{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:clamp(1.25rem,4vw,2.55rem);font-weight:700;letter-spacing:-.04em;overflow-wrap:anywhere}.copy-button{border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.07);color:#fff;border-radius:10px;padding:9px 14px;cursor:pointer}.copy-button:disabled{opacity:.45;cursor:default}.status{color:#9fb1c3;margin:8px 0 34px}.lookup-bar{max-width:720px;position:relative;z-index:1}.lookup-bar label{display:block;font-weight:750;margin-bottom:9px}.input-row{display:flex;gap:10px}.input-row input{flex:1;min-width:0;background:#fff;border:2px solid #fff;border-radius:12px;padding:14px 16px;color:var(--ink);outline:none}.input-row input:focus{border-color:var(--mint)}.input-row button{background:var(--mint);color:#04271f;border:0;border-radius:12px;padding:14px 22px;font-weight:850;cursor:pointer}.input-row button:hover{background:#70f2d3}.lookup-bar>p{font-size:.86rem;color:#91a6ba;margin:8px 0 0}.details-shell{max-width:1180px;margin:-34px auto 0;padding:0 24px 52px;position:relative;z-index:2}.section-heading{background:#fff;border-radius:var(--radius) var(--radius) 0 0;padding:34px 36px 20px;display:flex;justify-content:space-between;gap:30px;align-items:end;box-shadow:var(--shadow)}.section-heading h2{margin:7px 0 0}.section-heading p{max-width:450px;color:var(--muted);margin:0}.kicker{color:var(--mint-dark)}.details-grid{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;padding:0 24px 34px;box-shadow:var(--shadow);border-radius:0 0 var(--radius) var(--radius)}.detail-card{padding:22px 14px;border-top:1px solid var(--line)}.detail-card span{display:block;color:var(--muted);font-size:.85rem;margin-bottom:5px}.detail-card strong{font-size:1.04rem;overflow-wrap:anywhere}.notice{margin:18px 0 0;padding:14px 18px;border-radius:12px}.error{background:#fff1f0;color:var(--danger);border:1px solid #ffd5d2}.content-grid{max-width:1180px;margin:0 auto;padding:36px 24px 86px;display:grid;grid-template-columns:1.4fr .9fr;gap:26px}.article-card,.checklist-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:38px}.article-card p,.checklist-card p{color:var(--muted)}.feature-article{position:relative}.feature-article:before{content:"";display:block;width:74px;height:5px;border-radius:4px;background:var(--mint);margin-bottom:28px}.text-link{display:inline-flex;gap:8px;font-weight:800;color:#096b5b}.numbered-list{list-style:none;padding:0;margin:25px 0 0}.numbered-list li{display:flex;gap:16px;padding:19px 0;border-top:1px solid var(--line)}.numbered-list li>span{color:var(--mint-dark);font-weight:850}.numbered-list p{margin:3px 0 0;font-size:.92rem}.faq-section{max-width:860px;margin:0 auto;padding:20px 24px 100px}.faq-section h2{margin-top:8px}.faq-section details{border-top:1px solid var(--line);padding:20px 0}.faq-section summary{font-weight:780;font-size:1.04rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px}.faq-section summary:after{content:"+";color:var(--mint-dark);font-size:1.3rem}.faq-section details[open] summary:after{content:"−"}.faq-section details p{color:var(--muted);margin:12px 0 0;max-width:760px}.site-footer{background:#06111f;color:#d8e2eb;padding:54px max(24px,calc((100vw - 1180px)/2)) 30px;display:grid;grid-template-columns:1fr auto;gap:30px}.footer-brand{color:#fff}.site-footer p{color:#8fa1b3;margin:13px 0 0}.site-footer nav{display:grid;grid-template-columns:repeat(3,auto);gap:10px 26px;align-content:start}.site-footer nav a:hover{text-decoration:underline}.copyright{grid-column:1/-1;border-top:1px solid #203044;padding-top:24px!important;font-size:.86rem}.page-hero{background:var(--ink);color:#fff;padding:74px max(24px,calc((100vw - 960px)/2))}.page-hero p{color:#afbfce;max-width:700px;font-size:1.08rem}.page-shell{max-width:960px;margin:0 auto;padding:64px 24px 96px}.prose{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(28px,5vw,58px)}.prose h2{margin-top:44px}.prose h2:first-child{margin-top:0}.prose h3{margin-top:30px}.prose p,.prose li{color:#44566a}.prose a{color:#087b68;text-decoration:underline}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.guide-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;display:flex;flex-direction:column}.guide-card p{color:var(--muted);flex:1}.guide-card a{font-weight:800;color:#087b68}.contact-box{display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px;background:#e9fff9;border:1px solid #b7efdf;border-radius:18px;padding:26px}.button-link{display:inline-block;background:var(--ink);color:#fff!important;text-decoration:none!important;padding:12px 18px;border-radius:10px;font-weight:780}.skip-note{font-size:.88rem;color:var(--muted)}@media(max-width:760px){.site-header{height:auto;min-height:68px;flex-wrap:wrap;padding:15px 20px}.menu-button{display:block}.site-nav{display:none;flex-basis:100%;padding:16px 0 5px;gap:10px;flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.site-nav a{padding:9px 0}.tool-hero{padding-top:58px}.ip-readout{align-items:flex-start;flex-direction:column}.section-heading{padding:28px 24px 16px;align-items:start;flex-direction:column}.details-grid{grid-template-columns:1fr;padding:0 18px 26px}.content-grid{grid-template-columns:1fr;padding-top:16px}.article-card,.checklist-card{padding:28px}.site-footer{grid-template-columns:1fr}.site-footer nav{grid-template-columns:repeat(2,auto);justify-content:start}.cards{grid-template-columns:1fr}.contact-box{grid-template-columns:1fr}.input-row{flex-direction:column}}