:root{--bg:#0b2224;--sheet:#11373a;--hole:#071719;--ink:#e6f8fa;--mut:#a9d0d3;--line:#2f6367;--line2:#46878c;--sky:#7df9ff;--paper:#f2e6e2;--pink:#ff9ada;
--mono:"Anonymous Pro","Courier New",Courier,monospace;--slab:"Zilla Slab",Rockwell,Georgia,serif}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.68 var(--mono);overflow-wrap:break-word}
img,svg{max-width:100%}
a{color:var(--sky);text-underline-offset:3px}
a:hover{color:var(--paper)}
:focus-visible{outline:2px solid var(--paper);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:0;background:var(--paper);color:var(--bg);padding:12px 16px;z-index:50}
.skip:focus{left:8px;top:8px}
h1,h2,h3{font-family:var(--slab);font-weight:700;line-height:1.14;margin:0;color:var(--ink)}
p{margin:0 0 1.1em}

/* stencil head strip with duplicator slots */
.strip{background:var(--bg)}
.strip-in{max-width:780px;margin:0 auto;background:var(--sheet);border:1px solid var(--line);border-bottom:1px dashed var(--line2);display:flex;justify-content:space-between;gap:8px;padding:12px 26px 11px}
.strip i{display:block;flex:1 1 0;max-width:44px;height:12px;border-radius:6px;background:var(--hole);box-shadow:inset 0 1px 0 #000000,0 1px 0 rgba(125,249,255,.22)}

/* header */
.top{position:sticky;top:0;z-index:30;background:var(--bg)}
.top-in{position:relative;max-width:780px;margin:0 auto;background:var(--sheet);border:1px solid var(--line);border-top:0;border-bottom:3px double var(--line2);display:flex;align-items:center;flex-wrap:wrap;gap:6px 14px;padding:8px 18px 8px 26px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px;color:var(--ink);text-decoration:none;font:700 1.22rem/1 var(--slab);letter-spacing:.02em;margin-right:auto}
.logo .mark{flex:none}
.nav{display:flex;align-items:center;gap:2px;order:2}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 9px;color:var(--mut);text-decoration:none;font-size:.9rem}
.nav a:hover{color:var(--ink);text-decoration:underline}
.nav a[aria-current]{color:var(--ink);text-decoration:underline double;text-decoration-color:var(--sky)}
.top .key{order:3}
.burger{display:none;order:4;width:44px;height:44px;padding:11px 9px;background:none;border:1px solid var(--line2);cursor:pointer;flex-direction:column;justify-content:space-between}
.burger span{display:block;height:2px;background:var(--ink)}

/* buttons: the cream backing sheet seen through a cut window */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 18px;background:var(--paper);color:var(--bg);border:0;border-radius:0;font:700 .95rem/1.2 var(--mono);text-decoration:none;cursor:pointer;text-align:center;box-shadow:0 0 0 3px var(--sheet),0 0 0 4px var(--line2);transition:background .15s}
.btn:hover{background:#ffffff;color:var(--bg)}
.btn.big{min-height:52px;padding:10px 26px;font-size:1.05rem}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line2)}
.btn.ghost:hover{background:rgba(125,249,255,.12);color:var(--ink)}
.btn.sm{min-height:44px;padding:6px 14px;font-size:.88rem}
.btn[disabled]{opacity:.6;cursor:wait}

/* the sheet */
.sheet{position:relative;max-width:780px;margin:0 auto;background:var(--sheet);border:1px solid var(--line);border-top:0;border-bottom:0;padding:34px 44px 64px 72px;counter-reset:sec}
.sheet::before{content:"";position:absolute;left:0;top:0;bottom:0;width:20px;pointer-events:none;
background-image:repeating-linear-gradient(var(--sky) 0 1px,transparent 1px 120px),repeating-linear-gradient(var(--line2) 0 1px,transparent 1px 24px);background-size:20px 100%,10px 100%;background-repeat:no-repeat;opacity:.8}
.sheet>*{min-width:0}
body{min-height:100vh;display:flex;flex-direction:column}
main{flex:1 0 auto;display:flex;flex-direction:column;min-width:0}
.sheet{flex:1 0 auto;width:100%}

.crumbs ol{list-style:none;margin:0 0 20px;padding:0;display:flex;flex-wrap:wrap;font-size:.84rem;color:var(--mut)}
.crumbs li+li::before{content:"/";margin:0 8px;color:var(--line2)}
.crumbs a{color:var(--mut);display:inline-block;padding:10px 0}
.crumbs li{padding:10px 0}.crumbs li:has(a){padding:0}

.hero{padding:26px 0 8px}
.hero.slim{padding:0 0 4px}
.eyebrow,.cap,.slip-h{font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:var(--sky);margin:0 0 14px}
h1{font-size:clamp(2.1rem,6.2vw,3.35rem);letter-spacing:-.01em;padding-bottom:16px;border-bottom:3px double var(--line2);margin-bottom:20px}
.slim h1{font-size:clamp(1.9rem,5vw,2.6rem)}
.lead{font-size:1.1rem;color:var(--ink);margin-bottom:1.2em}
.meta{font-size:.86rem;color:var(--mut)}
.ticks{list-style:none;margin:0 0 1.5em;padding:0}
.ticks li{position:relative;padding:6px 0 6px 34px;border-bottom:1px dotted var(--line)}
.ticks li::before{content:"";position:absolute;left:0;top:1.05em;width:20px;height:8px;border-radius:4px;background:var(--hole);box-shadow:0 1px 0 rgba(125,249,255,.3)}
.cta-row{display:flex;flex-wrap:wrap;gap:18px;margin:26px 0 8px}

.try{margin:34px 0 0}
.try .cap{margin-bottom:10px}

/* code */
.codebox{border:1px solid var(--line2);background:var(--hole)}
.codetabs{display:flex;border-bottom:1px dashed var(--line2);overflow-x:auto}
.codetabs button{min-height:44px;padding:0 18px;background:none;border:0;border-right:1px solid var(--line);color:var(--mut);font:700 .9rem var(--mono);cursor:pointer}
.codetabs button[aria-selected="true"]{background:var(--paper);color:var(--bg)}
pre.code{position:relative;margin:0 0 1.3em;padding:54px 18px 18px;background:var(--hole);border:1px solid var(--line2);color:#dbf4f6;font:400 .9rem/1.6 var(--mono);overflow-x:auto;max-width:100%;white-space:pre;tab-size:2}
.codebox pre.code{border:0;margin:0}
pre.code code{font:inherit;background:none;padding:0;border:0;color:inherit}
pre.code .k{color:var(--sky);font-weight:700}pre.code .s{color:#ecbdae}pre.code .c{color:#93c2c6;font-style:italic}
.copy{position:absolute;top:6px;right:6px;min-height:40px;min-width:64px;padding:0 12px;background:transparent;color:var(--ink);border:1px solid var(--line2);font:700 .8rem var(--mono);cursor:pointer}
.copy:hover{background:var(--paper);color:var(--bg)}
code{font-family:var(--mono);background:var(--hole);border:1px solid var(--line);padding:1px 5px;font-size:.94em}

/* spec lines */
.spec{margin:34px 0 0;padding:6px 0;border-top:1px solid var(--line2);border-bottom:1px solid var(--line2)}
.spec div{display:flex;align-items:baseline;gap:10px;padding:9px 0}
.spec div+div{border-top:1px dotted var(--line)}
.spec dt{order:1;color:var(--mut);font-size:.92rem;flex:0 1 auto}
.spec div::after{content:"";order:2;flex:1 1 20px;border-bottom:2px dotted var(--line2);transform:translateY(-4px);min-width:16px}
.spec dd{order:3;margin:0;font:700 1.18rem/1.2 var(--slab);color:var(--paper);text-align:right}
.spec.big{margin-top:10px}
.spec.big dd{font-size:1.7rem}
.spec.big div{padding:13px 0}

/* numbered sections */
.sec{counter-increment:sec;counter-reset:it;margin-top:58px}
.sh{font-size:1.65rem;padding-bottom:10px;border-bottom:3px double var(--line2);margin-bottom:22px}
.sh::before{content:counter(sec) ".0";display:inline-block;margin-right:14px;font:700 .95rem var(--mono);color:var(--sky);vertical-align:.25em;letter-spacing:.05em}
.items{list-style:none;margin:0;padding:0;display:grid;gap:0 34px}
.items li{counter-increment:it;position:relative;padding:14px 0 6px 50px;border-top:1px dotted var(--line);min-width:0}
.items li::before{content:counter(sec) "." counter(it);position:absolute;left:0;top:17px;font:700 .9rem var(--mono);color:var(--sky)}
.items h3{font-size:1.16rem;margin-bottom:6px}
.items p{color:var(--mut);font-size:.96rem;margin-bottom:.8em}
.items.steps li{padding-left:74px;min-height:74px}
.items.steps li::before{content:counter(it);top:12px;width:52px;height:52px;display:flex;align-items:center;justify-content:center;background:var(--paper);color:var(--bg);font:700 1.7rem var(--slab);box-shadow:0 0 0 3px var(--sheet),0 0 0 4px var(--line2);left:4px}

/* prose */
.prose{margin-top:54px}
.prose h2{font-size:1.55rem;margin:1.9em 0 .7em;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:7px;text-decoration-color:var(--line2);line-height:1.35;scroll-margin-top:84px}
.prose>h2:first-child{margin-top:0}
.prose h3{font-size:1.2rem;margin:1.5em 0 .5em}
.prose ul,.prose ol{padding-left:1.5em;margin:0 0 1.2em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--sky)}
.prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:0 0 1.4em;font-size:.93rem}
.prose th,.prose td{border:1px solid var(--line2);padding:9px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--hole);color:var(--paper);font-weight:700}
.prose strong{color:var(--paper)}

/* faq */
.faq details{border-top:1px dotted var(--line2)}
.faq details:last-child{border-bottom:1px dotted var(--line2)}
.faq summary{list-style:none;cursor:pointer;position:relative;min-height:52px;padding:14px 44px 14px 0;font:700 1.12rem/1.35 var(--slab)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:10px;font:700 1.5rem var(--mono);color:var(--sky)}
.faq details[open] summary::after{content:"\2013"}
.faq p{color:var(--mut);padding:0 0 8px;margin-bottom:.8em}

/* end call to action */
.endcta{border:1px solid var(--line2);background:var(--hole);padding:26px 26px 22px;margin-top:64px}
.endcta .sh{border:0;margin-bottom:8px;padding:0}
.endcta p{color:var(--mut)}
.endcta .cta-row{margin:20px 0 6px}

/* takeaways + index slip */
.take{border:1px solid var(--line2);background:var(--hole);padding:20px 22px 8px;margin:24px 0 0}
.take .ticks{margin-bottom:.6em}.take .ticks li:last-child{border-bottom:0}
.slip{margin:30px 0 0}
.slip-in{border:1px dashed var(--line2);padding:18px 20px 12px}
.slip ol{list-style:none;margin:0;padding:0;counter-reset:tc}
.slip li{counter-increment:tc}
.slip a{display:flex;gap:10px;padding:9px 0;min-height:44px;align-items:baseline;color:var(--ink);text-decoration:none;border-top:1px dotted var(--line);font-size:.92rem;line-height:1.4}
.slip a::before{content:counter(tc,decimal-leading-zero);color:var(--sky);font-weight:700;flex:none}
.slip a:hover{color:var(--paper);text-decoration:underline}

/* signup */
.form{margin:22px 0 0;border:1px solid var(--line2);background:var(--hole);padding:22px 22px 20px}
.tabs2{display:flex;margin:0 0 18px;border:1px solid var(--line2)}
.tabs2 button{flex:1 1 0;min-height:46px;padding:6px 8px;background:none;border:0;color:var(--mut);font:700 .92rem var(--mono);cursor:pointer}
.tabs2 button[aria-selected="true"]{background:var(--paper);color:var(--bg)}
.msg{font-size:.92rem;margin:0 0 14px;padding:10px 14px;border-left:4px solid var(--sky);background:rgba(125,249,255,.1);color:var(--ink)}
.msg:empty{display:none}
.msg.err{border-left-color:var(--pink);background:rgba(255,154,218,.1);color:#ffd3ef}
.row{margin:0 0 14px}
.row label,.calc label{display:block;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--mut);margin-bottom:6px}
input,select,textarea{width:100%;min-height:48px;padding:10px 14px;background:var(--paper);color:var(--bg);border:0;border-radius:0;font:700 1rem/1.4 var(--mono);box-shadow:0 0 0 1px var(--line2)}
textarea{min-height:170px;resize:vertical;font-weight:400}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.note{font-size:.84rem;color:var(--mut);margin:8px 0 0}
.form .btn[data-submit]{width:100%;min-height:54px;font-size:1.05rem;margin-top:6px}
.form .btn.ghost[data-gauth]{min-height:50px;background:var(--sheet)}
.keyout{display:none}
.keyout.on{display:block}
.keyout h3{font-size:1.3rem;margin-bottom:12px}
.keybox{display:flex;align-items:center;gap:10px;background:var(--paper);color:var(--bg);padding:8px 8px 8px 14px;font-weight:700;margin-bottom:6px}
.keybox span{flex:1 1 auto;min-width:0;word-break:break-all}
.keybox .btn{background:var(--bg);color:var(--paper);box-shadow:none;flex:none}
.keyout>p{margin:14px 0}
.acts{display:flex;flex-wrap:wrap;gap:14px;margin:18px 0 6px}
.mut{color:var(--mut)}

/* calculator */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:18px 22px;border:1px solid var(--line2);background:var(--hole);padding:22px}
.calc>div{min-width:0}
.calc>div:last-child{grid-column:1/-1;border-top:1px dashed var(--line2);padding-top:16px;display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.calc>div:last-child label{margin:0}
.calc output{font:700 2.4rem/1 var(--slab);color:var(--paper)}

/* support */
.support{margin-top:10px}
.support form{border:1px solid var(--line2);background:var(--hole);padding:22px;position:relative}
.support .btn{min-height:52px;padding:10px 34px;margin-top:6px}
.support [data-support-msg]{color:var(--ink);font-size:.95rem}

/* 404 */
.nf{padding:40px 0 80px}
.nfs{background:none;margin:0 0 34px}
.nfs .strip-in{background:var(--hole);border-style:dashed;justify-content:center;gap:20px}

/* footer */
.foot{background:var(--bg)}
.foot-in{max-width:780px;margin:0 auto;background:var(--sheet);border:1px solid var(--line);border-top:3px double var(--line2);padding:26px 44px 34px 72px;font-size:.9rem}
.f-brand{display:flex;align-items:center;gap:10px;font:700 1.15rem var(--slab);margin:0 0 6px}
.f-tag{color:var(--mut);margin:0 0 14px}
.f-links{list-style:none;margin:0 0 14px;padding:10px 0 0;display:flex;flex-wrap:wrap;gap:0 22px;border-top:1px dotted var(--line2)}
.f-links a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink)}
.legal{color:var(--mut);font-size:.82rem;margin:0}

@media(min-width:700px){.items.two{grid-template-columns:1fr 1fr}}
@media(min-width:1320px){
.slip{position:absolute;left:100%;top:150px;bottom:40px;width:262px;margin:0 0 0 28px}
.slip-in{position:sticky;top:96px;background:var(--sheet);max-height:calc(100vh - 120px);overflow:auto}
}
@media(max-width:860px){
.burger{display:flex}
.top .key{order:2;min-height:44px;padding:6px 12px;font-size:.86rem}
.nav{display:none;order:5;flex:1 1 100%;flex-direction:column;align-items:stretch;border-top:1px dashed var(--line2);padding:4px 0}
.nav.open{display:flex}
.nav a{min-height:46px;padding:0 4px;border-bottom:1px dotted var(--line);font-size:1rem}
}
@media(max-width:640px){
body{font-size:16px}
.strip-in{padding:10px 14px 9px;border-left:0;border-right:0}
.strip i:nth-child(n+7){display:none}
.top-in{padding:6px 10px 6px 14px;border-left:0;border-right:0;gap:6px 8px}
.logo{font-size:1.08rem;gap:8px}
.sheet{border-left:0;border-right:0;padding:24px 16px 48px 28px}
.sheet::before{width:12px;background-size:12px 100%,6px 100%}
.foot-in{border-left:0;border-right:0;padding:24px 16px 30px 28px}
.sh{font-size:1.4rem}
.sh::before{display:block;margin:0 0 6px}
.items li{padding-left:42px}
.calc{grid-template-columns:1fr;padding:16px}
.form,.support form{padding:16px 14px}
.endcta{padding:20px 16px}
.cta-row .btn{flex:1 1 100%}
.spec dd{font-size:1.05rem}.spec.big dd{font-size:1.3rem}
.hero{padding-top:10px}
}
@media(max-width:380px){.top .key{padding:6px 9px;font-size:.8rem}.logo .mark{width:26px;height:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}