/* Rathlow marketing site, facelift 2026-09-04. Self-hosted fonts only, no CDN. */
@font-face{font-family:'IBM Plex Sans';src:url("fonts/IBMPlexSans-400.woff2") format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url("fonts/IBMPlexSans-500.woff2") format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Sans';src:url("fonts/IBMPlexSans-600.woff2") format('woff2');font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url("fonts/IBMPlexMono-400.woff2") format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url("fonts/IBMPlexMono-500.woff2") format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url("fonts/IBMPlexMono-600.woff2") format('woff2');font-weight:600;font-style:normal;font-display:swap}

:root{
  --ink:#171613; --ink-2:#232120; --ink-3:#2E2B28;
  --canvas:#F3F2ED; --paper:#FFFFFF; --header:#EDEBE4; --sand:#E7E4DA;
  --rust:#BF4D2B; --rust-hover:#A43E20; --rust-wash:rgba(191,77,43,.10);
  --line:#DEDBD2; --line-2:#E4E6E9; --line-ink:rgba(243,242,237,.12);
  --text:#3A3835; --heading:#171613; --muted:#726E66; --faint:#9A968D;
  --on-ink:#F3F2ED; --on-ink-muted:rgba(243,242,237,.66); --on-ink-dim:rgba(243,242,237,.42);
  --blue:#3E6FA6; --blue-text:#35618F; --green:#4C8A5D; --green-text:#3E7550; --amber:#C8832E; --amber-text:#9E5F16;
  --sans:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --r:10px; --r-sm:6px; --wrap:1180px;
  --shadow:0 1px 2px rgba(23,22,19,.06),0 12px 40px -18px rgba(23,22,19,.28);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--canvas);color:var(--text);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--rust);color:#fff}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.mono{font-family:var(--mono)}
.eyebrow{font:600 11.5px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--rust);display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--rust);display:inline-block}
.on-ink .eyebrow{color:var(--rust)}
h1,h2,h3{color:var(--heading);font-weight:600;letter-spacing:-.02em;line-height:1.08;text-wrap:balance}
h1{font-size:clamp(38px,4.6vw,56px)}
h2{font-size:clamp(30px,3.6vw,44px)}
h3{font-size:20px;letter-spacing:-.01em;line-height:1.25}
.lede{font-size:clamp(17px,1.5vw,20px);line-height:1.55;color:var(--muted);max-width:620px;text-wrap:pretty}
p{text-wrap:pretty}
.on-ink{background:var(--ink);color:var(--on-ink-muted)}
.on-ink h1,.on-ink h2,.on-ink h3{color:var(--on-ink)}
.on-ink .lede{color:var(--on-ink-muted)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-sm);font:500 14.5px var(--sans);border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,transform .15s,color .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--rust);color:#fff}
.btn-primary:hover{background:var(--rust-hover)}
.btn-ghost{background:transparent;color:var(--heading);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--heading)}
.on-ink .btn-ghost{color:var(--on-ink);border-color:rgba(243,242,237,.28)}
.on-ink .btn-ghost:hover{border-color:var(--on-ink)}
.btn-sm{height:36px;padding:0 14px;font-size:13.5px}
.btn .arrow{transition:transform .15s}
.btn:hover .arrow{transform:translateX(3px)}
.textlink{font-weight:500;color:var(--heading);border-bottom:1px solid var(--line);padding-bottom:1px;transition:border-color .15s}
.textlink:hover{border-color:var(--rust);color:var(--rust)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(243,242,237,.86);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.site-header .wrap{height:68px;display:flex;align-items:center;gap:36px}
.logo{display:flex;align-items:center;gap:10px;color:var(--heading);font:600 19px/1 var(--sans);letter-spacing:-.02em;flex:none}
.logo svg{width:22px;height:22px}
.nav{display:flex;gap:28px;flex:1}
.nav a{font-size:14px;font-weight:500;color:var(--text);padding:6px 0;position:relative}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--rust);transform:scaleX(0);transform-origin:left;transition:transform .2s}
.nav a:hover::after,.nav a[aria-current]::after{transform:scaleX(1)}
.nav a[aria-current]{color:var(--heading);font-weight:600}
.hdr-cta{display:flex;gap:10px;align-items:center;flex:none}
.nav-toggle{display:none}
.nav-burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);align-items:center;justify-content:center;cursor:pointer;flex:none}
.nav-burger span{width:18px;height:2px;background:var(--heading);position:relative;display:block}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--heading)}
.nav-burger span::before{top:-6px}.nav-burger span::after{top:6px}
@media (max-width:900px){
  .site-header .wrap{gap:16px}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--canvas);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 28px 16px}
  .nav a{padding:12px 0;border-bottom:1px solid var(--line);font-size:16px}
  .nav a::after{display:none}
  .nav-toggle:checked ~ .nav{display:flex}
  .nav-burger{display:flex;margin-left:auto}
  .hdr-cta .btn-ghost{display:none}
}
@media (max-width:520px){.hdr-cta{display:none}}

/* sections */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head .eyebrow{margin-bottom:18px}
.section-head h2{margin-bottom:16px}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g4,.g3,.g2{grid-template-columns:1fr}}

/* cards */
.card{background:var(--paper);border:1px solid var(--line-2);border-radius:var(--r);padding:26px;box-shadow:0 1px 2px rgba(23,22,19,.04);transition:transform .2s,box-shadow .2s,border-color .2s}
.card h3{margin-bottom:10px}
.card p{font-size:14.5px;line-height:1.65;color:var(--text)}
.card .num{font:600 12px var(--mono);color:var(--rust);margin-bottom:16px;letter-spacing:.04em}
.card .glyph{width:38px;height:38px;border-radius:8px;background:var(--rust-wash);display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:var(--rust)}
.card .glyph svg{width:20px;height:20px}
.card-hover:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line)}
.on-ink .card{background:var(--ink-2);border-color:var(--line-ink);box-shadow:none}
.on-ink .card p{color:var(--on-ink-muted)}
.on-ink .card h3{color:var(--on-ink)}

/* hero */
.hero{padding:96px 0 88px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:48px}}
.hero h1{margin:22px 0 22px}
.hero .lede{margin-bottom:34px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.hero-note{font-size:13.5px;color:var(--on-ink-dim)}
.hero-note b{color:var(--on-ink-muted);font-weight:500}
.hero::before{content:"";position:absolute;inset:auto -10% -40% auto;width:60vw;height:60vw;max-width:800px;max-height:800px;border-radius:50%;background:radial-gradient(closest-side,rgba(191,77,43,.16),transparent 70%);pointer-events:none}

/* product mock (grid) */
.mock{background:var(--canvas);border-radius:12px;border:1px solid rgba(243,242,237,.14);box-shadow:0 30px 80px -30px rgba(0,0,0,.7);overflow:hidden;color:var(--text);font-size:12.5px;position:relative}
.mock-bar{height:36px;background:var(--header);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 14px;gap:14px;font:500 11.5px var(--mono);color:var(--muted)}
.mock-bar .dots{display:flex;gap:6px}
.mock-bar .dots i{width:9px;height:9px;border-radius:50%;background:#D7DADE;display:block}
.mock-bar .tab{color:var(--heading);font-weight:600}
.mock table{width:100%;border-collapse:collapse;background:var(--paper)}
.mock th{font:600 10.5px var(--mono);letter-spacing:.05em;text-transform:uppercase;color:var(--faint);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line-2);background:#FAFAF8}
.mock td{padding:10px 12px;border-bottom:1px solid var(--line-2);color:var(--heading);white-space:nowrap}
.mock td.c{font-family:var(--mono);font-size:11.5px;color:var(--muted)}
.mock tr:last-child td{border-bottom:0}
.dot{display:inline-flex;align-items:center;gap:6px;font:500 11.5px var(--mono);color:var(--muted)}
.dot::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--faint);flex:none}
.dot.filed::before{background:var(--green)} .dot.filed{color:var(--green-text)}
.dot.prep::before{background:var(--blue)} .dot.prep{color:var(--blue-text)}
.dot.soon::before{background:var(--amber)} .dot.soon{color:var(--amber-text)}
.dot.over::before{background:var(--rust)} .dot.over{color:var(--rust);font-weight:600}
.pill{display:inline-block;font:600 10px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:3px 7px;border-radius:4px;border:1px solid}
.pill.file{background:var(--rust-wash);color:#9A3D22;border-color:rgba(191,77,43,.35)}
.pill.comply{background:rgba(62,111,166,.12);color:#2E5885;border-color:rgba(62,111,166,.35)}
.pill.watch{background:#EEF0F2;color:#6E6A62;border-color:#D7DADE}
.conf{display:inline-block;font:600 10px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:3px 7px;border-radius:4px}
.conf.high{background:#E1F0EC;color:#2B6E5E}.conf.med{background:#F5EBD8;color:#8A5A17}.conf.low{background:#F5E4DE;color:#86382A}
.finding{position:absolute;right:-6px;bottom:-14px;width:min(340px,86%);background:var(--paper);border:1px solid var(--line);border-radius:10px;box-shadow:0 18px 50px -14px rgba(23,22,19,.45);padding:14px 16px;transform:rotate(-1.2deg)}
.finding .top{display:flex;align-items:center;gap:8px;margin-bottom:8px;font:500 11.5px var(--mono);color:var(--muted)}
.finding .body{font-size:12.5px;line-height:1.5;color:var(--heading);margin-bottom:12px}
.finding .body em{font-style:normal;background:var(--rust-wash);padding:0 3px;border-radius:3px}
.finding .acts{display:flex;gap:6px;flex-wrap:wrap}
.finding .acts span{font:500 11px var(--sans);border:1px solid var(--line);border-radius:4px;padding:4px 8px;color:var(--heading)}
.finding .acts span.pri{background:var(--rust);color:#fff;border-color:var(--rust)}
.sample{position:absolute;top:8px;right:12px;font:500 10px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--faint)}
.mock-wrap{position:relative;padding-bottom:26px}
@media (max-width:640px){.finding{position:static;width:auto;transform:none;margin-top:14px}.mock-wrap{padding-bottom:0}}

/* problem strip */
.problem{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:start}
@media (max-width:980px){.problem{grid-template-columns:1fr;gap:40px}}
.problem p{font-size:17px;line-height:1.65;color:var(--text);margin-bottom:16px}
.problem p strong{color:var(--heading);font-weight:600}
.stack{border-top:1px solid var(--line)}
.stack .row{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:22px 0;border-bottom:1px solid var(--line)}
.stack .row .n{font:600 13px var(--mono);color:var(--rust);padding-top:3px}
.stack .row h3{font-size:17px;margin-bottom:6px}
.stack .row p{font-size:14.5px;color:var(--muted);margin:0}

/* modules band */
.modules .card{padding:24px}
.modules h3{font-size:16.5px}
.modules p{font-size:13.5px;color:var(--muted)}

/* split feature */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0}
.split.rev>.copy{order:2}
@media (max-width:980px){.split{grid-template-columns:1fr;gap:32px;padding:40px 0}.split.rev>.copy{order:0}}
.split .copy h2{font-size:clamp(26px,3vw,36px);margin:16px 0 16px}
.split .copy p{font-size:15.5px;line-height:1.7;margin-bottom:14px}
.panel{background:var(--paper);border:1px solid var(--line-2);border-radius:12px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.panel .ph{padding:12px 16px;border-bottom:1px solid var(--line-2);font:600 12.5px var(--sans);color:var(--heading);display:flex;justify-content:space-between;align-items:center}
.panel .ph .sample{position:static}
.panel .pb{padding:16px}
.list{display:flex;flex-direction:column}
.list .li{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line-2);font-size:13.5px;color:var(--heading)}
.list .li:last-child{border-bottom:0}
.list .li .grow{flex:1}
.list .li .c{font:500 12px var(--mono);color:var(--muted)}
.keycap{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:5px;padding:5px 9px;font:500 12px var(--sans);color:var(--heading)}
.keycap i{font:500 10px var(--mono);background:var(--header);border-radius:3px;padding:1px 5px;color:var(--muted);font-style:normal}

/* charter strip */
.charter{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
@media (max-width:980px){.charter{grid-template-columns:1fr;gap:32px}}
.charter p{font-size:15.5px;line-height:1.7;margin-bottom:14px}
.commit{border-top:1px solid var(--line-ink)}
.commit .row{display:grid;grid-template-columns:44px 1fr;gap:14px;padding:20px 0;border-bottom:1px solid var(--line-ink)}
.commit .row .n{font:600 13px var(--mono);color:var(--rust);padding-top:2px}
.commit .row h3{font-size:16px;margin-bottom:4px}
.commit .row p{font-size:14px;color:var(--on-ink-muted);margin:0}

/* cohort banner */
.banner{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:40px;display:grid;grid-template-columns:1.3fr auto;gap:32px;align-items:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.banner::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--rust)}
.banner h2{font-size:clamp(24px,2.6vw,32px);margin:10px 0 10px}
.banner p{font-size:15px;color:var(--text);max-width:600px}
@media (max-width:820px){.banner{grid-template-columns:1fr;padding:28px}}

/* cta band */
.cta{padding:88px 0;text-align:center}
.cta h2{margin-bottom:12px}
.cta p{margin:0 auto 28px;max-width:560px}

/* page hero (inner pages) */
.page-hero{padding:88px 0 40px}
.page-hero .eyebrow{margin-bottom:18px}
.page-hero h1{font-size:clamp(36px,4.6vw,56px);margin-bottom:18px;max-width:820px}
.page-hero .lede{max-width:680px}
.prose{max-width:720px}
.prose p{font-size:16.5px;line-height:1.7;margin-bottom:18px}
.prose h2{font-size:26px;margin:40px 0 12px}

/* faq */
.faq details{border-top:1px solid var(--line);padding:0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:22px 0;font:600 17.5px var(--sans);color:var(--heading);display:flex;justify-content:space-between;align-items:center;gap:20px;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 26px var(--mono);color:var(--rust);flex:none;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 0 24px;font-size:15.5px;line-height:1.7;max-width:720px}

/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.steps{grid-template-columns:1fr}}
.steps .st{border-top:2px solid var(--line);padding-top:18px}
.steps .st::before{counter-increment:s;content:"0" counter(s);font:600 12px var(--mono);color:var(--rust);display:block;margin-bottom:12px}
.steps .st h3{font-size:16.5px;margin-bottom:8px}
.steps .st p{font-size:14px;color:var(--muted)}

/* footer */
.footer{background:var(--ink);color:var(--on-ink-muted);padding:64px 0 28px;border-top:1px solid var(--line-ink)}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
@media (max-width:820px){.footer .cols{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.footer .cols{grid-template-columns:1fr}}
.footer .logo{color:var(--on-ink);margin-bottom:14px}
.footer .blurb{font-size:13.5px;line-height:1.6;max-width:300px}
.footer .h{font:600 11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--on-ink-dim);margin-bottom:14px}
.footer .col a{display:block;font-size:13.5px;color:var(--on-ink-muted);padding:5px 0;transition:color .15s}
.footer .col a:hover{color:var(--on-ink)}
.footer .legal{margin-top:40px;padding-top:20px;border-top:1px solid var(--line-ink);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--on-ink-dim)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* misc */
.tick{font:500 13px var(--mono);color:var(--muted);display:flex;gap:18px;flex-wrap:wrap;margin-top:28px}
.tick span::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--rust);margin-right:8px;vertical-align:middle}
.status-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
@media (max-width:760px){.status-strip{grid-template-columns:1fr}}
.status-strip>div{background:var(--paper);padding:22px 24px}
.status-strip .k{font:600 11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--faint);margin-bottom:8px}
.status-strip .v{font-size:16px;font-weight:600;color:var(--heading);letter-spacing:-.01em}
.status-strip .s{font-size:13px;color:var(--muted);margin-top:4px}

/* mobile overflow guards */
.hero-grid>*,.split>*,.problem>*,.charter>*,.grid>*{min-width:0}
.mock{overflow-x:auto}
@media (max-width:640px){.mock td,.mock th{padding:9px 10px}.mock th:nth-child(5),.mock td:nth-child(5){display:none}.hero{padding:64px 0 56px}.section{padding:64px 0}}
.mock-bar span{white-space:nowrap}
@media (max-width:640px){.mock-bar span:not(.tab):not(.sample){display:none}.finding .top{flex-wrap:wrap}}

.strip-ink{background:var(--line-ink);border-color:var(--line-ink)}
.strip-ink>div{background:var(--ink-2)}
.strip-ink .v{color:var(--on-ink)}
.strip-ink .s{color:var(--on-ink-muted)}