:root{--bg:#fff;--fg:#0a0a0a;--mut:#5f6368;--sub:#fafafa;--card:#fff;--bd:#eaeaea;--bd2:#d4d4d4;--ac:#0b7a5b;--acbg:#e8f5f0;--code:#f4f4f5;--r:10px;
--sans:"Geist","Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.65 var(--sans);background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:3px;text-decoration-color:var(--bd2)}a:hover{text-decoration-color:var(--fg)}
.w{max-width:1100px;margin:0 auto;padding:0 24px}.nw{max-width:760px}
:focus-visible{outline:2px solid var(--ac);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:var(--bg);padding:8px;z-index:9}
header.top{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--bd)}
header.top .w{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:inline-flex;align-items:center;gap:9px;font-weight:600;letter-spacing:-.01em;text-decoration:none;font-size:16px}.logo svg{width:24px;height:24px}
.logo b{font-weight:600}.logo span{color:var(--mut);font-weight:500}
nav.main{display:flex;align-items:center;gap:22px;font-size:14px}nav.main a{text-decoration:none;color:var(--mut)}nav.main a:hover,nav.main a[aria-current]{color:var(--fg)}
.btn{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 16px;border-radius:8px;border:1px solid var(--fg);background:var(--fg);color:var(--bg)!important;font:500 14px var(--sans);text-decoration:none;cursor:pointer;white-space:nowrap}
.btn:hover{opacity:.88}.btn.ghost{background:transparent;color:var(--fg)!important;border-color:var(--bd2)}.btn.ghost:hover{border-color:var(--fg);opacity:1}
nav.main .btn{height:34px;padding:0 12px;font-size:13px}
@media(max-width:760px){nav.main a.hide-m{display:none}nav.main{gap:14px}}
h1,h2,h3{letter-spacing:-.025em;line-height:1.15;margin:0 0 12px;font-weight:650}
h1{font-size:clamp(36px,6vw,64px);letter-spacing:-.04em}h2{font-size:clamp(24px,3.4vw,32px)}h3{font-size:18px;letter-spacing:-.01em}
p{margin:0 0 14px}.lead{font-size:clamp(17px,2vw,20px);color:var(--mut);max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:500 13px var(--mono);color:var(--mut);border:1px solid var(--bd);border-radius:99px;padding:4px 12px;margin-bottom:22px;background:var(--bg)}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--ac);display:inline-block}
.hero{position:relative;border-bottom:1px solid var(--bd);overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--bd) 1px,transparent 1px),linear-gradient(90deg,var(--bd) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse at 70% 0%,#000 10%,transparent 65%);-webkit-mask-image:radial-gradient(ellipse at 70% 0%,#000 10%,transparent 65%);opacity:.7;pointer-events:none}
.hero .w{position:relative;padding-top:72px;padding-bottom:72px}
.hgrid{display:grid;gap:48px;align-items:center}@media(min-width:960px){.hgrid{grid-template-columns:1.1fr .9fr}}
.ctas{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 0}
section.s{padding:80px 0;border-bottom:1px solid var(--bd)}section.alt{background:var(--sub)}
.sh{max-width:640px;margin-bottom:36px}.sh p{color:var(--mut)}
.k{font:500 12px var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--ac);margin-bottom:10px;display:block}
.grid{display:grid;gap:0;border:1px solid var(--bd);border-radius:var(--r);overflow:hidden;background:var(--card)}
@media(min-width:820px){.grid.c3{grid-template-columns:repeat(3,1fr)}.grid.c4{grid-template-columns:repeat(4,1fr)}.grid.c2{grid-template-columns:repeat(2,1fr)}}
.grid>*{padding:26px;border-bottom:1px solid var(--bd)}
@media(min-width:820px){.grid>*{border-bottom:0;border-right:1px solid var(--bd)}.grid>*:last-child{border-right:0}}
.grid>*:last-child{border-bottom:0}
a.cardlink{text-decoration:none;display:flex;flex-direction:column;transition:background .15s}a.cardlink:hover{background:var(--sub)}
.cardlink .go{margin-top:auto;padding-top:18px;font:500 13px var(--mono);color:var(--fg)}.cardlink p{color:var(--mut);font-size:15px}
.num{font:500 12px var(--mono);color:var(--mut);margin-bottom:14px;display:block}
.term{border:1px solid var(--bd);border-radius:12px;background:var(--card);box-shadow:0 1px 0 var(--bd),0 24px 60px -24px rgba(0,0,0,.18);overflow:hidden;font:13px/1.7 var(--mono)}
.term .bar{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--bd);color:var(--mut);font-size:12px}.term .bar i{width:10px;height:10px;border-radius:50%;background:var(--bd2);display:inline-block}.term .bar span{margin-left:8px}
.term pre{margin:0;padding:18px 18px 20px;overflow:auto;white-space:pre}.c1{color:var(--mut)}.c2{color:var(--ac)}
form.sub{display:flex;flex-wrap:wrap;gap:8px;max-width:480px;margin-top:26px}
input,select,textarea{font:15px var(--sans);color:var(--fg);background:var(--bg);border:1px solid var(--bd2);border-radius:8px;padding:0 12px;height:40px;width:100%}
textarea{height:auto;padding:10px 12px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--fg);box-shadow:0 0 0 3px color-mix(in srgb,var(--fg) 12%,transparent)}
form.sub input[type=email]{flex:1 1 240px;width:auto}
.hp{position:absolute!important;left:-9999px!important}
.note{font-size:13px;color:var(--mut)}.msg{font-size:14px;min-height:1.4em;margin-top:8px;font-weight:500}.msg.ok{color:var(--ac)}.msg.err{color:#d93036}
.reveal{display:none;margin-top:16px;padding:16px;border:1px solid var(--ac);background:var(--acbg);border-radius:var(--r)}.reveal.on{display:block}
.cta{border:1px solid var(--bd);border-radius:14px;padding:44px 32px;background:var(--card);display:grid;gap:24px;align-items:center}@media(min-width:860px){.cta{grid-template-columns:1.2fr 1fr}}
.cta form.sub{margin-top:0}
ul.ticks{list-style:none;padding:0;margin:0}ul.ticks li{padding:6px 0 6px 26px;position:relative;color:var(--mut)}ul.ticks li:before{content:"";position:absolute;left:2px;top:13px;width:12px;height:7px;border-left:2px solid var(--ac);border-bottom:2px solid var(--ac);transform:rotate(-45deg)}
footer.ft{padding:48px 0 56px;color:var(--mut);font-size:14px}
.fgrid{display:grid;gap:28px}@media(min-width:760px){.fgrid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.fgrid h4{margin:0 0 10px;color:var(--fg);font-size:13px;font-weight:600}.fgrid ul{list-style:none;padding:0;margin:0}.fgrid li{margin:6px 0}.fgrid a{text-decoration:none}.fgrid a:hover{color:var(--fg)}
.legal{margin-top:36px;padding-top:20px;border-top:1px solid var(--bd);font-size:12.5px;line-height:1.6}
/* docs layout */
.docs{display:grid;gap:40px;padding-top:40px;padding-bottom:80px}@media(min-width:1000px){.docs{grid-template-columns:220px minmax(0,1fr)}}
.side{font-size:14px}@media(min-width:1000px){.side{position:sticky;top:84px;align-self:start}}
.side h4{font:500 12px var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--mut);margin:0 0 10px}
.side ul{list-style:none;margin:0 0 24px;padding:0}.side li a{display:block;padding:5px 10px;margin-left:-10px;border-radius:6px;text-decoration:none;color:var(--mut)}.side li a:hover{color:var(--fg);background:var(--sub)}.side li a[aria-current]{color:var(--fg);background:var(--sub);font-weight:500}
@media(max-width:999px){.side ul.toc{display:none}.side h4.toc{display:none}.side ul{display:flex;flex-wrap:wrap;gap:4px 14px}.side li a{margin:0;padding:3px 0}}
article{max-width:760px;min-width:0}
article h1{font-size:clamp(32px,4.6vw,46px)}article h2{margin-top:48px;padding-top:8px;font-size:24px}article h3{margin-top:28px}
article p,article li{color:color-mix(in srgb,var(--fg) 82%,var(--mut))}article ul,article ol{padding-left:22px}article li{margin:6px 0}
.crumb{font:500 13px var(--mono);color:var(--mut);margin-bottom:18px}.crumb a{text-decoration:none}
.meta{display:flex;flex-wrap:wrap;gap:8px 16px;font:13px var(--mono);color:var(--mut);margin:18px 0 26px}
.callout{border:1px solid var(--bd);border-left:3px solid var(--fg);border-radius:8px;padding:14px 16px;background:var(--sub);font-size:14.5px;margin:20px 0}.callout p:last-child{margin:0}.callout strong{color:var(--fg)}
.callout.uk{border-left-color:var(--ac)}.callout.uk .flag{font:600 11px var(--mono);letter-spacing:.06em;color:var(--ac);display:block;margin-bottom:4px}
.callout.us .flag{font:600 11px var(--mono);letter-spacing:.06em;color:var(--fg);display:block;margin-bottom:4px}
code,kbd{font:13.5px var(--mono);background:var(--code);border:1px solid var(--bd);border-radius:5px;padding:1px 5px}
pre.f{font:13.5px/1.7 var(--mono);background:var(--code);border:1px solid var(--bd);border-radius:var(--r);padding:16px 18px;overflow:auto;white-space:pre}
.tool{border:1px solid var(--bd);border-radius:12px;background:var(--card);margin:24px 0;overflow:hidden}
.tool .th{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;border-bottom:1px solid var(--bd);font:500 13px var(--mono);color:var(--mut);background:var(--sub)}
.tool .tb{padding:20px 18px;display:grid;gap:16px}@media(min-width:720px){.tool .tb.two{grid-template-columns:1fr 1fr}}
.field label{display:block;font-size:13.5px;font-weight:500;margin-bottom:6px}.field .hint{font-size:12.5px;color:var(--mut);margin-top:4px}
.seg{display:flex;flex-wrap:wrap;gap:6px}.seg label{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--bd2);border-radius:8px;padding:7px 11px;font-size:14px;font-weight:400;margin:0;cursor:pointer}
.seg input{width:auto;height:auto;margin:0;accent-color:var(--fg)}.seg label:has(input:checked){border-color:var(--fg);background:var(--sub)}
.out{border-top:1px solid var(--bd);padding:18px;background:var(--sub)}
.kv{display:grid;grid-template-columns:1fr auto;gap:6px 18px;font-size:14.5px}.kv dt{color:var(--mut)}.kv dd{margin:0;font:500 14.5px var(--mono);text-align:right}
.kv .big{font-size:20px;color:var(--fg)}.kv dt.bigl{color:var(--fg);font-weight:600}
.result{font-size:20px;font-weight:600;letter-spacing:-.01em;margin:0 0 6px}.result small{display:block;font:500 12px var(--mono);color:var(--mut);letter-spacing:.04em;text-transform:uppercase;margin-bottom:4px}
.rules{counter-reset:r;list-style:none;padding:0!important}.rules li{border:1px solid var(--bd);border-radius:8px;padding:10px 14px;margin:8px 0;font-size:14.5px}.rules li.hit{border-color:var(--ac);background:var(--acbg)}
.rules code{margin-right:6px}
table{border-collapse:collapse;width:100%;font-size:14.5px;margin:16px 0}th,td{text-align:left;border-bottom:1px solid var(--bd);padding:9px 10px;vertical-align:top}th{font-weight:600;font-size:13px;color:var(--mut)}
.sources{font-size:14.5px}.sources li{margin:8px 0}.sources .org{font:500 12px var(--mono);color:var(--mut);margin-right:6px}
.disc{font-size:13.5px;color:var(--mut);border:1px solid var(--bd);border-radius:8px;padding:12px 14px;margin:0 0 8px}.disc strong{color:var(--fg)}
.pager{display:grid;gap:12px;margin-top:56px}@media(min-width:640px){.pager{grid-template-columns:1fr 1fr}}
.pager a{border:1px solid var(--bd);border-radius:var(--r);padding:14px 16px;text-decoration:none}.pager a:hover{border-color:var(--fg)}.pager small{display:block;color:var(--mut);font-size:12.5px}.pager .nx{text-align:right}
textarea.md{font:13px/1.6 var(--mono);min-height:340px;background:var(--code)}
.row{display:flex;flex-wrap:wrap;gap:8px}
.page{padding-top:56px;padding-bottom:80px}
@media print{header.top,footer.ft,.side,.noprint,.pager{display:none!important}body{background:#fff;color:#000}}
.logo b{white-space:nowrap}nav.main a{white-space:nowrap}
@media(max-width:560px){nav.main a[href="/pack/"]{display:none}.term{font-size:11.5px}.term pre{padding:14px}.hero .w{padding-top:48px;padding-bottom:56px}}


/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}/* light-theme */:root{color-scheme:light;--field:#8a8a8a}input,select,textarea,.seg label{border-color:var(--field)}::placeholder{color:var(--mut);opacity:1}.logo img{display:block;height:28px;width:auto}.xlink{display:inline-flex;align-items:center;gap:6px}.xlink .xi{flex:none}.social{display:flex;flex-wrap:wrap;gap:8px 16px}.disc.box{border:1px solid var(--bd2);border-left:3px solid var(--fg);background:var(--sub);padding:16px 18px;font-size:14px;color:var(--fg)}.disc.box p{margin:8px 0 0;color:var(--fg)}.disc.box p.small{font-size:13px;color:var(--mut)}.toolnote{font-size:13px;color:var(--mut);border-top:1px dashed var(--bd2);margin:14px 0 0;padding-top:10px}.out>.toolnote:first-child{border-top:0;margin:0 0 12px;padding:0}.ctanote{margin-top:10px}.flagged{background:#fff7e0;border:1px solid #e0c060;padding:10px 12px;border-radius:8px;color:#0a0a0a}.pair{display:grid;gap:12px;margin:20px 0}@media(min-width:760px){.pair{grid-template-columns:1fr 1fr}}.pair .callout{margin:0}.callout.j{border-left-color:var(--ac)}.callout.j .flag{font:600 11px var(--mono);letter-spacing:.06em;color:var(--ac);display:block;margin-bottom:6px}.callout h4{font-size:14.5px;margin:12px 0 4px;color:var(--fg)}.callout h4:first-of-type{margin-top:0}.nextdocs{margin-top:32px;padding-top:14px;border-top:1px solid var(--bd2)}.tips{display:grid;gap:16px;margin-top:28px}@media(min-width:760px){.tips{grid-template-columns:1fr 1fr}}.tipslot{border:1px solid var(--bd2);border-radius:10px;padding:18px}.tipslot h2{font-size:18px;margin:0 0 6px}.tiprow{display:flex;gap:8px;align-items:center;margin:10px 0}.tipaddr{flex:1;min-width:0;overflow-wrap:anywhere;font:13px var(--mono);background:var(--sub);padding:8px 10px;border-radius:6px}.tipqr svg{display:block;max-width:220px;height:auto}/* end light-theme *//* redesign */
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/fonts/newsreader-latin-opsz-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/fonts/newsreader-latin-ext-opsz-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
:root{--fg:#1a1a1a;--mut:#454545;--sub:#f7f5f0;--warm:#f7f5f0;--bd:#e4e1da;--bd2:#cfcbc2;--navy:#1f2a44;--serif:"Newsreader","Source Serif 4",Georgia,"Times New Roman",serif}
body{font-size:17.5px;line-height:1.6;color:var(--fg)}
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.012em;line-height:1.12;font-optical-sizing:auto}
h1{letter-spacing:-.02em}h2{color:var(--navy)}h3{font-size:21px}
article h2{font-size:28px}.callout h4,.fgrid h4{font-family:var(--sans)}
.lead{color:var(--mut)}article p,article li{color:var(--fg)}
.k{color:var(--navy);font-size:12.5px}.eyebrow{color:var(--mut)}
.note,.toolnote{font-size:14.5px;color:var(--mut)}.legal{font-size:14px;color:var(--mut)}
footer.ft{font-size:15px;color:var(--mut);background:#fff}
nav.main{font-size:15px}nav.main a{color:var(--mut)}
.disc.box{font-size:15px;border-left-color:var(--navy);background:var(--warm)}.disc.box p.small{font-size:14px;color:var(--mut)}
.callout{font-size:16px;background:var(--warm)}.callout.j{border-left-color:var(--navy)}.callout.j .flag{color:var(--navy);display:inline;margin:0}.callout h4{font-size:16px;color:var(--navy)}
.jh{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.jt{display:inline-flex;gap:0;vertical-align:middle}.jt b{font:600 11px/1 var(--mono);letter-spacing:.06em;padding:4px 7px;border:1px solid var(--navy);color:var(--navy);background:#fff}.jt b+b{border-left:0}.jt b:first-child{border-radius:4px 0 0 4px}.jt b:last-child{border-radius:0 4px 4px 0}.jt b.on{background:var(--navy);color:#fff}
.num{display:flex;align-items:center;justify-content:space-between;color:var(--mut);font-size:13px}
table,.sources,.kv,.kv dd,.rules li{font-size:16px}th{font-size:14px;color:var(--mut)}.sources .org{font-size:13px;color:var(--mut)}
.meta,.crumb{font-size:14px;color:var(--mut)}.side{font-size:15px}.side h4{color:var(--mut)}.side li a{color:var(--mut)}
.field label{font-size:15px}.field .hint{font-size:14px;color:var(--mut)}input,select,textarea{font-size:16px}.seg label{font-size:15px}
.tool .th{background:var(--warm);color:var(--mut);font-size:13.5px}.out{background:var(--warm)}
.cardlink p{font-size:16px;color:var(--mut)}a.cardlink:hover{background:var(--warm)}.cardlink h3{font-size:24px}
section.alt{background:var(--warm)}.grid{background:#fff}
svg.art{display:block;color:var(--fg);width:120px;height:72px;margin:0 0 16px}article>svg.art{margin:0 0 6px}
.pager small{color:var(--mut);font-size:13.5px}
/* calculator preview in the hero */
.calc{margin:0;border:1px solid var(--bd2);border-radius:12px;background:#fff;padding:22px 22px 18px;box-shadow:0 24px 60px -30px rgba(31,42,68,.28)}
.calc .ch{display:flex;align-items:center;gap:10px;font:500 13px var(--mono);color:var(--mut);margin-bottom:18px}
.exl,.ill{font:600 11.5px/1 var(--mono);font-style:normal;letter-spacing:.06em;text-transform:uppercase;color:var(--navy);border:1px solid var(--navy);border-radius:4px;padding:4px 7px}
.ill{margin-left:8px;vertical-align:1px}
.crow{margin:0 0 16px}.cl{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 12px;font-size:15px;margin-bottom:6px}.cv{font:500 15px var(--mono);white-space:nowrap}
.cb{height:14px;border:1.5px solid var(--fg);border-radius:3px;background:#fff;overflow:hidden}.cb i{display:block;height:100%;width:var(--w)}
.c-cash{background:repeating-linear-gradient(90deg,transparent 0 9px,var(--bd2) 9px 10px)}.c-res{background:var(--navy)}.c-btc{background:#0b7a5b}
.calc figcaption{font-size:14.5px;color:var(--mut);border-top:1px solid var(--bd);padding-top:12px;margin-top:4px}
/* worked example strip */
.wxg{display:grid;gap:16px}@media(min-width:820px){.wxg{grid-template-columns:repeat(3,1fr)}}
.wxi{background:#fff;border:1px solid var(--bd);border-radius:10px;padding:20px 22px;display:flex;flex-direction:column}
.wl{font:500 12.5px var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--mut);margin-bottom:8px}
.bn{font:500 clamp(34px,4.4vw,46px)/1.1 var(--serif);letter-spacing:-.02em;color:var(--fg);font-variant-numeric:tabular-nums lining-nums}
.wl2{font-size:15px;color:var(--mut);margin-top:8px}
/* gentle motion, only when the visitor has not asked for reduced motion */
html.motion .fx{opacity:0;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease}html.motion .fx.in{opacity:1;transform:none}
html.motion .calc .cb i{width:0;transition:width .9s ease}html.motion .calc.in .cb i{width:var(--w)}
@media(prefers-reduced-motion:reduce){html .fx{opacity:1!important;transform:none!important;transition:none!important}.calc .cb i{width:var(--w)!important;transition:none!important}}
@media(max-width:560px){body{font-size:17px}.calc{padding:18px 16px 14px}.cv{font-size:14px}.hero .w{padding-top:40px}}
/* end redesign */

/* no grid background in hero */
.hero:before{display:none!important;background:none!important}