:root{--ink: #0d1b2c;--body: #2c3d52;--muted: #5a6b80;--accent: #0b5cab;--accent-dark: #084179;--accent-wash: #eef4fb;--surface: #ffffff;--page: #f1f5f9;--border: #d4dde8;--border-strong: #b3c2d4;--result-bg: #f4f9f4;--result-border: #b9d7bf;--result-ink: #14532d;--warn-bg: #fff8e8;--warn-border: #e5c67a;--warn-ink: #6b4a05;--error-bg: #fdeeee;--error-border: #e2a5a5;--error-ink: #94181a;--radius: 10px;--shadow: 0 1px 2px rgba(13, 27, 44, .06), 0 4px 14px rgba(13, 27, 44, .05);--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--wrap: 70rem;--prose: 44rem}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}body{margin:0;background:var(--page);color:var(--body);font-family:var(--font);font-size:1rem;line-height:1.6;display:flex;flex-direction:column;min-height:100vh;overflow-wrap:break-word}h1,h2,h3,h4{color:var(--ink);line-height:1.25;margin:0 0 .5em;font-weight:650;letter-spacing:-.01em}h1{font-size:clamp(1.7rem,1.3rem + 1.8vw,2.5rem)}h2{font-size:clamp(1.3rem,1.15rem + .7vw,1.6rem);margin-top:2rem}h3{font-size:1.1rem;margin-top:1.5rem}p{margin:0 0 1rem}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}a:hover{color:var(--accent-dark)}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}ul,ol{margin:0 0 1rem;padding-left:1.25rem}li{margin-bottom:.4rem}code{font-family:var(--mono);font-size:.9em;background:var(--accent-wash);padding:.1em .35em;border-radius:4px}hr{border:0;border-top:1px solid var(--border);margin:2rem 0}.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 1rem}.prose{max-width:var(--prose)}.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:.75rem 1rem;z-index:100}.skip-link:focus{left:0}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.75rem}.brand{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;color:var(--ink);text-decoration:none;font-size:1.05rem;letter-spacing:-.02em;padding:.3rem 0}.brand:hover{color:var(--accent-dark)}.brand svg{flex:none}.nav-toggle{display:inline-flex;align-items:center;gap:.5rem;background:var(--surface);border:1px solid var(--border-strong);border-radius:8px;color:var(--ink);font:inherit;font-size:.95rem;padding:.55rem .8rem;cursor:pointer;min-height:44px}.nav-toggle:hover{background:var(--accent-wash)}.nav{display:none}.nav.is-open{display:block;padding:.5rem 0 1rem;border-top:1px solid var(--border)}.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.15rem}.nav a{display:block;padding:.7rem .5rem;color:var(--body);text-decoration:none;border-radius:6px;font-size:1rem;min-height:44px}.nav a:hover{background:var(--accent-wash);color:var(--accent-dark)}.nav a[aria-current=page]{color:var(--accent-dark);font-weight:650;background:var(--accent-wash)}@media(min-width:62rem){.nav-toggle{display:none}.nav,.nav.is-open{display:block;border-top:0;padding:0}.nav ul{flex-direction:row;align-items:center;gap:.1rem}.nav a{padding:.5rem .7rem;font-size:.95rem;min-height:0}}.site-footer{margin-top:auto;background:var(--ink);color:#c7d4e2;padding:2.5rem 0 2rem;font-size:.925rem}.site-footer h2{color:#fff;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 .75rem}.site-footer a{color:#dbe6f2;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin-bottom:.45rem}.footer-grid{display:grid;gap:2rem;grid-template-columns:1fr}@media(min-width:40rem){.footer-grid{grid-template-columns:repeat(3,1fr)}}@media(min-width:62rem){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}.footer-bottom{margin-top:2rem;padding-top:1.25rem;border-top:1px solid rgba(255,255,255,.15);color:#9fb2c7;font-size:.85rem}main{padding:1.75rem 0 3rem}@media(min-width:48rem){main{padding:2.5rem 0 4rem}}.breadcrumb{font-size:.875rem;color:var(--muted);margin-bottom:1rem}.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;margin:0;padding:0}.breadcrumb li{margin:0}.breadcrumb li+li:before{content:"/";margin-right:.35rem;color:var(--border-strong)}.lede{font-size:1.1rem;color:var(--body);max-width:var(--prose)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.calc{margin:1.5rem 0 2rem;padding:1.25rem;scroll-margin-top:1rem}@media(min-width:48rem){.calc{padding:1.75rem}}@media(min-width:60rem){.calc__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:2rem;align-items:start}}.calc h2{margin-top:0}.field{margin-bottom:1.1rem}.field.is-hidden{display:none}.field label,.field .field__label{display:block;font-weight:600;color:var(--ink);margin-bottom:.3rem;font-size:.95rem}.field input[type=number],.field input[type=text],.field input[type=datetime-local],.field select{width:100%;font:inherit;font-size:1rem;padding:.65rem .7rem;border:1px solid var(--border-strong);border-radius:8px;background:var(--surface);color:var(--ink);min-height:44px}.field input:focus,.field select:focus{border-color:var(--accent)}.field input[aria-invalid=true]{border-color:var(--error-border);background:var(--error-bg)}.field__row{display:flex;gap:.5rem;align-items:stretch}.field__row input{flex:1 1 auto;width:auto;min-width:0}.field__row select{flex:0 0 auto;width:auto;min-width:5rem;max-width:45%}.field__hint{display:block;font-size:.85rem;color:var(--muted);margin-top:.3rem}.field__error{display:none;font-size:.875rem;color:var(--error-ink);font-weight:600;margin-top:.3rem}.field__error.is-shown{display:block}.calc__actions{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.25rem}.btn{font:inherit;font-size:1rem;font-weight:600;padding:.7rem 1.4rem;border-radius:8px;border:1px solid transparent;cursor:pointer;min-height:46px}.btn--primary{background:var(--accent);color:#fff}.btn--primary:hover{background:var(--accent-dark)}.btn--secondary{background:var(--surface);color:var(--ink);border-color:var(--border-strong)}.btn--secondary:hover{background:var(--accent-wash)}.results{margin-top:1.5rem}@media(min-width:60rem){.results{margin-top:0}}.results__empty{border:1px dashed var(--border-strong);border-radius:var(--radius);padding:1.25rem;color:var(--muted);font-size:.95rem}.results__panel{border:1px solid var(--result-border);border-radius:var(--radius);background:var(--result-bg);padding:1.1rem 1.25rem}.results__panel h3{margin:0 0 .75rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--result-ink)}.result{padding:.55rem 0;border-bottom:1px solid rgba(20,83,45,.12)}.result:last-of-type{border-bottom:0}.result__label{display:block;font-size:.875rem;color:var(--body)}.result__value{display:block;font-size:1.15rem;font-weight:700;color:var(--ink)}.result--primary .result__value{font-size:1.6rem;color:var(--result-ink)}.result__alt{font-size:.9rem;font-weight:500;color:var(--muted);margin-left:.4rem}.result__note{display:block;font-size:.825rem;color:var(--muted);margin-top:.15rem}.result-list{list-style:none;padding:0;margin:.25rem 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(7rem,1fr));gap:.35rem 1rem}.result-list li{margin:0;font-size:.95rem}.result-list strong{color:var(--ink)}.notes{margin-top:1rem;padding-top:.85rem;border-top:1px solid rgba(20,83,45,.15);font-size:.9rem;color:var(--body)}.notes ul{margin:0;padding-left:1.1rem}.alert{border-radius:8px;padding:.85rem 1rem;font-size:.95rem;margin-bottom:1rem}.alert--error{background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-ink)}.alert--error strong{display:block;margin-bottom:.15rem}.alert--warn{background:var(--warn-bg);border:1px solid var(--warn-border);color:var(--warn-ink)}.noscript-note{background:var(--warn-bg);border:1px solid var(--warn-border);color:var(--warn-ink);border-radius:8px;padding:.85rem 1rem;font-size:.95rem;margin-bottom:1rem}.safety{border-left:4px solid var(--warn-border);background:var(--warn-bg);color:var(--warn-ink);padding:.9rem 1rem;border-radius:0 8px 8px 0;font-size:.925rem;margin:1.5rem 0}.safety p:last-child{margin-bottom:0}.safety a{color:var(--warn-ink);font-weight:600}.example{background:var(--accent-wash);border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.15rem;margin:1rem 0 1.5rem;max-width:var(--prose)}.example h3{margin-top:0;font-size:1rem}.example dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:.3rem 1rem;font-size:.95rem}.example dt{color:var(--muted)}.example dd{margin:0;color:var(--ink);font-weight:600}.example__answer{margin:.85rem 0 0;padding-top:.75rem;border-top:1px solid var(--border);font-weight:600;color:var(--ink)}.tool-grid{list-style:none;padding:0;margin:1.25rem 0 0;display:grid;gap:.85rem;grid-template-columns:1fr}@media(min-width:38rem){.tool-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:62rem){.tool-grid{grid-template-columns:repeat(3,1fr)}}.tool-grid li{margin:0}.tool-card{display:flex;flex-direction:column;height:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.1rem;text-decoration:none;box-shadow:var(--shadow)}.tool-card:hover{border-color:var(--accent)}.tool-card strong{display:block;color:var(--ink);font-size:1.02rem;margin-bottom:.3rem;line-height:1.3}.tool-card span{color:var(--body);font-size:.9rem;line-height:1.5}.cat-grid{list-style:none;padding:0;margin:1.25rem 0 0;display:grid;gap:.85rem;grid-template-columns:1fr}@media(min-width:38rem){.cat-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:70rem){.cat-grid{grid-template-columns:repeat(5,1fr)}}.cat-grid li{margin:0}.cat-card{display:block;height:100%;background:var(--surface);border:1px solid var(--border);border-top:3px solid var(--accent);border-radius:var(--radius);padding:1rem;text-decoration:none;box-shadow:var(--shadow)}.cat-card:hover{border-color:var(--accent);border-top-color:var(--accent-dark)}.cat-card strong{display:block;color:var(--ink);margin-bottom:.25rem}.cat-card span{color:var(--muted);font-size:.875rem}.hero{padding:.5rem 0 1.5rem}.hero h1{max-width:20ch}.hero p{max-width:var(--prose);font-size:1.1rem}.section{margin-top:2.5rem}.section>p{max-width:var(--prose)}.section__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem}.section__head h2{margin:0}.section__head a{font-size:.925rem;font-weight:600}.search{margin:1.5rem 0;max-width:32rem}.search label{display:block;font-weight:600;color:var(--ink);margin-bottom:.35rem}.search input{width:100%;font:inherit;font-size:1rem;padding:.7rem .8rem;border:1px solid var(--border-strong);border-radius:8px;min-height:46px;background:var(--surface);color:var(--ink)}.search__status{font-size:.9rem;color:var(--muted);margin-top:.4rem;min-height:1.4em}.dir-group{margin-top:2rem}.dir-group[hidden],.tool-grid li[hidden]{display:none}.related{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}.related h2{margin-top:0;font-size:1.1rem}.related ul{list-style:none;padding:0;margin:0;display:grid;gap:.5rem;grid-template-columns:1fr}@media(min-width:38rem){.related ul{grid-template-columns:repeat(3,1fr)}}.related li{margin:0}.related a{display:block;padding:.75rem .9rem;background:var(--surface);border:1px solid var(--border);border-radius:8px;text-decoration:none;font-weight:600;font-size:.95rem}.related a:hover{border-color:var(--accent)}.sources{font-size:.95rem}.sources li{margin-bottom:.5rem}.meta-line{font-size:.85rem;color:var(--muted);margin-top:2rem}.u-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}