:root{--bg: #f8fafc;--text: #172033;--soft: #3e4c63;--accent: #2563eb;--accent-ink: #1d4ed8;--accent-deep: #1e3a8a;--teal: #0d9488;--teal-ink: #0f766e;--line: #e2e8f0;--surface: #ffffff;--danger: #9f1239;--focus: #2563eb;--header: 4.25rem;--wrap: 1120px;--sans: "IBM Plex Sans", "Segoe UI", sans-serif;--mono: "IBM Plex Mono", ui-monospace, monospace}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:auto}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:1.0625rem;line-height:1.65;min-height:100vh}img,svg{max-width:100%;height:auto}h1,h2,h3,h4,p,ul,ol,dl,figure,blockquote,pre{margin-top:0}h1,h2,h3,h4{line-height:1.18;letter-spacing:-.03em;font-weight:600}a{color:var(--accent-ink)}code{font-family:var(--mono);font-size:.9em}a:hover{color:var(--accent-deep)}:focus{outline:none}:focus-visible{outline:2px solid var(--focus);outline-offset:3px}[id]{scroll-margin-top:5.25rem}.skip{position:absolute;left:1rem;top:-4rem;z-index:50;background:var(--text);color:#fff;padding:.6rem .9rem;border-radius:8px;text-decoration:none}.skip:focus{top:.75rem}.wrap{width:min(var(--wrap),calc(100% - 2.5rem));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--line)}.header-bar{position:relative;display:flex;align-items:center;justify-content:space-between;min-height:var(--header);gap:1rem}.logo{display:inline-flex;align-items:center;gap:.7rem;color:var(--text);text-decoration:none;min-height:44px}.logo:hover{color:var(--text)}.logo svg{width:32px;height:32px;flex:none}.logo-word{display:flex;flex-direction:column;line-height:1.05}.logo-name{font-weight:600;letter-spacing:-.03em;font-size:1.12rem}.logo-kicker{margin-top:.18rem;font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-ink);font-weight:500}.nav-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 .8rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--text);font:inherit;font-weight:500;cursor:pointer}.nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line);padding:.4rem 1.25rem .8rem;flex-direction:column}.nav.is-open{display:flex}.nav a{color:var(--text);text-decoration:none;font-weight:500;font-size:1rem;min-height:44px;display:flex;align-items:center}.nav a:hover,.nav a[aria-current=page]{color:var(--accent-ink)}.nav a[aria-current=page]{text-decoration:underline;text-underline-offset:.28rem}.site-footer{margin-top:4.5rem;border-top:1px solid var(--line);padding:2.5rem 0 2rem}.footer-grid{display:grid;gap:1.75rem}.footer-label{margin:0 0 .55rem;font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-ink)}.footer-label-next{margin-top:1.2rem}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li+li{margin-top:.35rem}.site-footer a{color:var(--text);text-decoration:none}.site-footer a:hover{color:var(--accent-ink);text-decoration:underline;text-underline-offset:.18em}.footer-mail{font-family:var(--mono);font-size:.92rem;word-break:break-all}.disclaimer{margin:1.5rem 0 0;color:var(--soft);font-size:.95rem;max-width:68ch}.footer-meta{margin:1rem 0 0;color:var(--soft);font-size:.9rem}.page-intro{padding:2.4rem 0 .25rem;max-width:44rem}.page-intro h1,.hero h1{margin:.35rem 0 .8rem;font-size:clamp(2rem,4.4vw,3.15rem)}.lede{margin:0;font-size:1.12rem;color:var(--text);max-width:46rem}.independence{margin:.9rem 0 0;color:var(--soft);font-size:.95rem;max-width:62ch}.crumbs{margin:0}.crumbs ol{display:flex;flex-wrap:wrap;gap:.35rem .4rem;list-style:none;margin:0;padding:0;font-size:.92rem;color:var(--soft)}.crumbs li{display:inline-flex;align-items:center;gap:.4rem}.crumbs li+li:before{content:"/";color:#94a3b8}.crumbs a{color:var(--soft);text-decoration:none}.crumbs a:hover{color:var(--accent-ink);text-decoration:underline;text-underline-offset:.18em}.hero{padding:2.4rem 0 1rem}.hero-grid{display:grid;gap:1.75rem;align-items:center}.kicker{margin:0;font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-ink)}.hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.35rem}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.55rem 1rem;border-radius:8px;border:1px solid transparent;font:inherit;font-weight:500;text-decoration:none;cursor:pointer}.btn-primary{background:var(--accent-ink);color:#fff}.btn-primary:hover{background:var(--accent-deep);color:#fff}.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--line)}.btn-secondary:hover{border-color:#cbd5e1;color:var(--text)}.btn:disabled{background:var(--line);color:var(--soft);cursor:not-allowed}.hero-fig{margin:0}.hero-fig svg{display:block;width:100%;background:var(--surface);border:1px solid var(--line);border-radius:12px}.hero-fig figcaption{margin-top:.55rem;color:var(--soft);font-size:.88rem}.band{padding:2.4rem 0 .4rem}.section-lead{margin:.45rem 0 1.1rem;max-width:46rem;color:var(--soft)}.symptom-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.symptom-list a{display:grid;gap:.25rem;padding:1rem 0;border-bottom:1px solid var(--line);color:inherit;text-decoration:none}.sym-code{font-family:var(--mono);font-size:.82rem;color:var(--teal-ink)}.sym-title{display:block;font-weight:600;letter-spacing:-.02em}.sym-text{display:block;color:var(--soft);margin-top:.15rem}.sym-go{font-family:var(--mono);font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;color:var(--accent-ink)}.proto-grid{display:grid;border-top:1px solid var(--line)}.proto-grid article{padding:1.15rem 0;border-bottom:1px solid var(--line)}.proto-grid h3{margin:0 0 .7rem;font-size:1.2rem}.proto-grid dl{margin:0}.proto-grid dt{font-family:var(--mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--teal-ink);margin-top:.55rem}.proto-grid dd{margin:.1rem 0 0}.secure-points{display:grid;gap:1.1rem;margin:0;padding:0;list-style:none}.secure-points li{padding-top:.9rem;border-top:1px solid var(--line)}.point-no{display:block;font-family:var(--mono);font-size:.78rem;color:var(--teal-ink);margin-bottom:.3rem}.text-link{display:inline-flex;align-items:center;min-height:44px;font-weight:500}.ask{display:grid;gap:.8rem;padding:1.4rem 0 0;border-top:1px solid var(--line)}.ask p{margin:0;max-width:46rem}.ask-mail{font-family:var(--mono);font-size:.95rem}.tool{display:grid;gap:1.25rem;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1.15rem}.tool h2{margin:.3rem 0 .45rem;font-size:clamp(1.6rem,3vw,2rem)}.tool-note,.result-note{color:var(--soft);margin:0}.choice-set{border:0;margin:0 0 1rem;padding:0}.choice-set legend{font-weight:600;margin-bottom:.45rem;padding:0}.choices{display:grid;gap:.45rem}.choice{display:flex;align-items:center;gap:.6rem;min-height:44px;padding:.4rem .7rem;border:1px solid var(--line);border-radius:8px;background:var(--bg);cursor:pointer}.choice:has(input:checked){border-color:var(--accent-ink);background:#eff6ff}.choice input{width:1.05rem;height:1.05rem;accent-color:var(--accent-ink)}.tool-result{border-top:1px solid var(--line);padding-top:1rem}.tool-result h3{margin:0 0 .45rem;font-size:1.25rem}.stage{margin:0 0 .55rem;font-family:var(--mono);font-size:.8rem;color:var(--teal-ink)}.result-links{display:flex;flex-wrap:wrap;gap:.35rem 1rem;list-style:none;margin:.8rem 0 0;padding:0}.result-links a{min-height:44px;display:inline-flex;align-items:center}.doc{display:grid;gap:1.25rem;padding-top:1.5rem;padding-bottom:1rem}.toc-label{margin:0 0 .35rem;font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-ink)}.toc ol{list-style:none;display:flex;flex-wrap:wrap;gap:.15rem 1rem;margin:0;padding:0}.toc a{color:var(--soft);text-decoration:none;display:inline-flex;align-items:center;min-height:44px}.toc a:hover{color:var(--accent-ink);text-decoration:underline;text-underline-offset:.18em}.prose{min-width:0;max-width:46rem}.prose h2{margin:2.1rem 0 .55rem;font-size:1.45rem}.prose h3{margin:1.4rem 0 .35rem;font-size:1.12rem}.prose p,.prose li,.prose dd{max-width:68ch}.prose ul:not(.steps):not(.map-list):not(.result-links),.prose ol:not(.steps){padding-left:1.2rem}.prose li+li,.stack>*+*{margin-top:.45rem}.prose a{text-underline-offset:.16em}.log,.mono{font-family:var(--mono);font-size:.86rem;line-height:1.55}.log{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:8px;padding:.9rem 1rem;overflow-wrap:anywhere;white-space:pre-wrap}.log-note,.fine{color:var(--soft);font-size:.92rem}.steps{list-style:none;padding:0;margin:.4rem 0 0;counter-reset:step}.steps>li{counter-increment:step;display:grid;grid-template-columns:2.1rem minmax(0,1fr);gap:.65rem;margin:.85rem 0;max-width:68ch}.steps>li:before{content:counter(step,decimal-leading-zero);font-family:var(--mono);font-size:.82rem;color:var(--teal-ink);padding-top:.15rem}.avoid{margin:1rem 0;padding-left:.9rem;border-left:3px solid var(--accent-ink)}.spec,.worked dl,.split-list{margin:.6rem 0 0}.spec>div,.worked dl>div,.split-list>div{display:grid;gap:.15rem;padding:.7rem 0;border-top:1px solid var(--line)}.spec dt,.worked dt,.split-list dt{font-family:var(--mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--teal-ink)}.spec dd,.worked dd,.split-list dd{margin:0}.worked{margin:1rem 0;padding:.2rem 0 .4rem;border-bottom:1px solid var(--line)}.worked figcaption{font-weight:600;margin-bottom:.45rem}.map-list{list-style:none;margin:.4rem 0 0;padding:0;border-top:1px solid var(--line)}.map-list li{display:grid;gap:.15rem;padding:.85rem 0;border-bottom:1px solid var(--line)}.map-list strong{font-weight:600}.related{margin-top:2.2rem;padding-top:.4rem}.related h2{margin-bottom:.4rem}.related ul{list-style:none;padding:0;margin:0}.related li+li{margin-top:.2rem}.related a{display:inline-flex;align-items:center;min-height:44px}.faq{padding:.5rem 0 1rem;max-width:46rem}.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:600;min-height:44px;display:flex;align-items:center;padding:.75rem 0;letter-spacing:-.02em}.faq summary:hover{color:var(--accent-ink)}.faq-a{margin:0;padding:0 0 1rem;color:var(--text)}.contact-layout{display:grid;gap:1.75rem;padding:2.4rem 0 1rem}.contact-layout h1{margin:.35rem 0 .8rem;font-size:clamp(2rem,4.4vw,3.15rem)}.contact-layout h2{margin:1.4rem 0 .4rem;font-size:1.15rem}.form-panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1.1rem}.form-row{margin-bottom:.9rem}.form-row label{display:block;font-weight:600;margin-bottom:.3rem}.help,.field-error{margin:.3rem 0 0;font-size:.92rem}.help{color:var(--soft)}.field-error{color:var(--danger)}input,select,textarea{width:100%;max-width:100%;min-width:0;font:inherit;color:var(--text);background:var(--bg);border:1px solid #cbd5e1;border-radius:8px;padding:.65rem .7rem;min-height:44px}textarea{min-height:160px;resize:vertical}.form-status,.form-error{margin:0 0 .9rem}.form-status{color:var(--teal-ink)}.form-error{color:var(--danger)}.legal{padding-bottom:1rem}.not-found{padding:3rem 0 2rem;max-width:40rem}.not-found .code{font-family:var(--mono);color:var(--teal-ink);margin:0}.not-found ul{padding-left:1.1rem}.not-found li+li{margin-top:.35rem}@media(min-width:720px){.footer-grid{grid-template-columns:1fr 1fr}.symptom-list a{grid-template-columns:9.5rem minmax(0,1fr) auto;gap:1rem;align-items:center}.secure-points{grid-template-columns:repeat(3,minmax(0,1fr));gap:0}.secure-points li{padding:0 1.2rem 0 0;margin-right:1.2rem;border-top:0;border-right:1px solid var(--line)}.secure-points li:last-child{border-right:0;margin-right:0;padding-right:0}.ask{grid-template-columns:minmax(0,1fr) auto;align-items:end}.spec>div,.worked dl>div{grid-template-columns:11rem minmax(0,1fr);gap:1rem;align-items:baseline}}@media(min-width:800px){.proto-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.proto-grid article{border-bottom:0;padding:1.2rem 1.25rem 1.2rem 0;margin-right:1.25rem;border-right:1px solid var(--line)}.proto-grid article:last-child{border-right:0;margin-right:0;padding-right:0}.hero-grid,.tool,.contact-layout{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:start}.tool-result{border-top:0;border-left:1px solid var(--line);padding-top:0;padding-left:1.25rem}.contact-layout{align-items:start;gap:2.5rem}}@media(min-width:960px){.nav-toggle{display:none}.nav,.nav.is-open{display:flex;position:static;flex-direction:row;align-items:center;gap:.15rem 1.05rem;background:transparent;border:0;padding:0}.nav a{min-height:44px;font-size:.95rem}.doc{grid-template-columns:12.5rem minmax(0,1fr);gap:2.5rem;align-items:start}.toc{position:sticky;top:5.4rem}.toc ol{display:block}.footer-grid{grid-template-columns:1.3fr 1fr .8fr}}@media(max-width:420px){.wrap{width:min(var(--wrap),calc(100% - 2rem))}.logo-kicker{display:none}}@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}.btn,.choice,.symptom-list a,.nav a{transition:background-color .16s ease,border-color .16s ease,color .16s ease}}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-sans-latin-400-normal.CDDApCn2.woff2) format("woff2"),url(/_astro/ibm-plex-sans-latin-400-normal.CYLoc0-x.woff) format("woff")}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/ibm-plex-sans-latin-500-normal.6ng42L7E.woff2) format("woff2"),url(/_astro/ibm-plex-sans-latin-500-normal.BgVn5rGT.woff) format("woff")}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/ibm-plex-sans-latin-600-normal.CuJfVYMP.woff2) format("woff2"),url(/_astro/ibm-plex-sans-latin-600-normal.Cu4Hd6ag.woff) format("woff")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-latin-400-normal.DMJ8VG8y.woff2) format("woff2"),url(/_astro/ibm-plex-mono-latin-400-normal.CvHOgSBP.woff) format("woff")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/ibm-plex-mono-latin-500-normal.DSY6xOcd.woff2) format("woff2"),url(/_astro/ibm-plex-mono-latin-500-normal.CB9ihrfo.woff) format("woff")}