/* Resident AI Partners — site styles. Tokens mirror the brand system (05-Brand). */
@font-face{font-family:"Geist";src:url("/fonts/Geist-Regular.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Geist";src:url("/fonts/Geist-Medium.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Geist";src:url("/fonts/Geist-SemiBold.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("/fonts/GeistMono-Regular.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("/fonts/GeistMono-Medium.woff2") format("woff2");font-weight:500;font-display:swap}

:root{
  --surface:#ffffff; --surface-alt:#f4f6f5; --line:#dde3e0; --ink:#0e1513; --ink-muted:#5a6461;
  --evergreen:#12604e; --evergreen-soft:#e4f1ec; --on-evergreen:#ffffff; --night:#0e1513; --night-ink:#eef2f0; --night-muted:#aab5b0; --night-line:#26302c;
  --caution:#9a5a00; --critical:#b42318;
  --sans:"Geist",-apple-system,"Helvetica Neue",Arial,sans-serif; --mono:"Geist Mono",ui-monospace,Menlo,monospace;
  --radius-sm:6px; --radius-md:12px; --radius-lg:24px; --radius-xl:32px; --radius-full:9999px;
  --focus:0 0 0 2px var(--surface),0 0 0 4px var(--evergreen);
  --shadow-float:0 1px 2px rgba(14,21,19,.06),0 12px 32px rgba(14,21,19,.10);
  --ease:cubic-bezier(.16,1,.3,1); --ease-soft:cubic-bezier(.25,.8,.25,1); --ease-in-out:cubic-bezier(.65,0,.35,1);
  --header-h:64px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --surface:#0b0f0e; --surface-alt:#131a18; --line:#26302c; --ink:#eef2f0; --ink-muted:#9aa6a1;
  --evergreen:#5cc4a4; --evergreen-soft:#10302a; --on-evergreen:#08201a; --night:#050807; --night-line:#1c2522;
  --caution:#f0aa4a; --critical:#ff8a7a; --shadow-float:0 1px 2px rgba(0,0,0,.4),0 12px 32px rgba(0,0,0,.5); color-scheme:dark}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{margin:0;background:var(--surface);color:var(--ink);font:400 16px/26px var(--sans);-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%}
a{color:var(--evergreen)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
[hidden]{display:none!important}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
.narrow{max-width:760px}
.skip{position:absolute;left:12px;top:-60px;z-index:50;background:var(--ink);color:var(--surface);padding:10px 16px;border-radius:var(--radius-full);text-decoration:none;font-size:14px}
.skip:focus{top:12px}

/* header */
.site-header{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:saturate(1.4) blur(16px);-webkit-backdrop-filter:saturate(1.4) blur(16px);border-bottom:1px solid transparent;transition:border-color .3s,background-color .3s}
.site-header.scrolled{border-bottom-color:var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--header-h)}
.logo{display:block;color:var(--ink);flex:none}
.logo svg{height:30px;width:auto;display:block}
.nav{display:flex;align-items:center;gap:28px;font-size:14px}
.nav a{color:var(--ink-muted);text-decoration:none;transition:color .2s}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
.head-actions{display:flex;align-items:center;gap:8px}
.menu-btn{display:none;width:40px;height:40px;border-radius:var(--radius-full);border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;align-items:center;justify-content:center;padding:0}
.menu-btn span{display:block;width:16px;height:1.5px;background:currentColor;position:relative;transition:transform .3s var(--ease),background-color .2s}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;transition:transform .3s var(--ease)}
.menu-btn span::before{top:-5px}.menu-btn span::after{top:5px}
.menu-open .menu-btn span{background:transparent}
.menu-open .menu-btn span::before{transform:translateY(5px) rotate(45deg)}
.menu-open .menu-btn span::after{transform:translateY(-5px) rotate(-45deg)}
.header-main{display:flex;align-items:center;gap:28px}
@media (max-width:860px){
  .logo svg{height:26px}
  .menu-btn{display:inline-flex}
  .nav{position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:0;padding:8px max(20px,env(safe-area-inset-left)) 24px;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow-float);
    opacity:0;transform:translateY(-8px);pointer-events:none;visibility:hidden;transition:opacity .25s var(--ease),transform .3s var(--ease),visibility 0s .3s}
  .nav a{font-size:20px;line-height:28px;color:var(--ink);padding:14px 0;border-bottom:1px solid var(--line)}
  .menu-open .nav{opacity:1;transform:none;pointer-events:auto;visibility:visible;transition:opacity .25s var(--ease),transform .3s var(--ease)}
}
@media (max-width:480px){.logo svg{height:20px}.head-actions .btn-small{padding:0 14px;height:36px;font-size:13px}.menu-btn{width:36px;height:36px}.site-header .wrap{gap:10px}}

/* type */
h1,h2,h3{font-weight:500;margin:0;text-wrap:balance}
.display-xxl{font-size:clamp(44px,8.4vw,112px);line-height:.98;letter-spacing:-.045em}
.display-xl{font-size:clamp(40px,7vw,80px);line-height:1.01;letter-spacing:-.04em}
.display{font-size:clamp(34px,5vw,60px);line-height:1.04;letter-spacing:-.038em}
.title{font-size:clamp(24px,3vw,32px);line-height:1.18;letter-spacing:-.02em}
.heading{font-size:21px;line-height:28px;letter-spacing:-.01em}
.lead{font-size:clamp(17px,1.9vw,21px);line-height:1.55;color:var(--ink-muted);max-width:58ch;margin:0;text-wrap:pretty}
.eyebrow{font-size:12px;line-height:16px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-muted)}
.muted{color:var(--ink-muted)}
.caption{font-size:13px;line-height:19px;color:var(--ink-muted)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.green{color:var(--evergreen)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--radius-full);font:500 15px/1 var(--sans);text-decoration:none;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .2s var(--ease),filter .2s,background-color .2s,color .2s,border-color .2s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--evergreen);color:var(--on-evergreen)}
.btn-primary:hover{filter:brightness(1.1)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--ink)}
.btn-small{height:38px;padding:0 16px;font-size:14px}
.btn .arr{transition:transform .25s var(--ease)}
.btn:hover .arr,.link-arrow:hover .arr{transform:translateX(3px)}
.link-arrow{font-weight:500;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}
.arr{display:inline-block}

/* sections */
section{padding-block:clamp(80px,11vw,152px)}
.alt{background:var(--surface-alt)}
.night{background:var(--night);color:var(--night-ink)}
.night .lead,.night .muted,.night .caption{color:var(--night-muted)}
.night .eyebrow{color:var(--night-muted)}
.section-head{display:grid;gap:16px;margin-bottom:clamp(40px,6vw,72px);max-width:760px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface-alt);border-radius:var(--radius-md);padding:28px;display:grid;gap:10px;align-content:start}
.alt .card{background:var(--surface)}
.card p{margin:0;color:var(--ink-muted)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding-block:56px 40px;font-size:14px;color:var(--ink-muted)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(2,minmax(0,1fr));gap:32px;margin-bottom:48px}
.foot-grid h2{font:500 13px/18px var(--sans);color:var(--ink);margin-bottom:12px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.foot-grid p{margin:12px 0 0;max-width:34ch}
.foot-base{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between;border-top:1px solid var(--line);padding-top:24px}
.site-footer a{color:var(--ink-muted);text-decoration:none;overflow-wrap:anywhere}
.site-footer a:hover{color:var(--ink)}
@media (max-width:640px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.foot-grid>div:first-child{grid-column:1/-1}}

/* motion: content is visible without JS; site.js adds .js to <html> before first paint */
.js .reveal{opacity:0;transform:translate3d(0,24px,0);transition:opacity .8s var(--ease-soft),transform 1.1s var(--ease);transition-delay:calc(var(--d,0) * 80ms);will-change:opacity,transform}
.js .reveal-scale{opacity:0;transform:translate3d(0,24px,0) scale(.97);transition:opacity .9s var(--ease-soft),transform 1.3s var(--ease);transition-delay:calc(var(--d,0) * 80ms);will-change:opacity,transform}
.js .reveal.in,.js .reveal-scale.in{opacity:1;transform:none}
.lines .ln{display:block;overflow:hidden;padding-bottom:.1em;margin-bottom:-.1em}
.lines .ln>span{display:block}
.js .lines .ln>span{transform:translate3d(0,108%,0);transition:transform 1.2s var(--ease);transition-delay:calc(var(--i,0) * 100ms + 60ms)}
.js .lines.in .ln>span{transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .js .reveal,.js .reveal-scale,.js .lines .ln>span{opacity:1;transform:none}
}