/* MedhAI site — tokens and components per ~/medhai/brand/DESIGN.md v1.0 */
:root{
  --paper:#FAFAF7;--card:#FFFFFF;--ink:#1C2528;--navy:#0B2138;--petrol:#0F6B66;--petrol-soft:#E3F0EE;
  --amber:#B07514;--amber-soft:#F7EEDC;--live:#2E7D42;--live-soft:#E4F0E5;--slate:#5A6B70;--line:#E3E4DD;--code-bg:#F0F1EC;
  --teal-mark:#5EEAD4;
  --display:"Fraunces",Georgia,"Times New Roman",serif;--body:"Public Sans","Helvetica Neue",Arial,sans-serif;--mono:"IBM Plex Mono",Menlo,Consolas,monospace;
  --wrap:1120px;--prose:720px;--r:6px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;
  --paper:#131A1C;--card:#1A2225;--ink:#E8ECEA;--petrol:#3FA8A0;--petrol-soft:#1B3236;--amber:#D79A3C;--amber-soft:#33290F;
  --live:#6FBF7E;--live-soft:#1C2E20;--slate:#93A5A8;--line:#2A3437;--code-bg:#212B2E;}}
:root[data-theme="dark"]{color-scheme:dark;
  --paper:#131A1C;--card:#1A2225;--ink:#E8ECEA;--petrol:#3FA8A0;--petrol-soft:#1B3236;--amber:#D79A3C;--amber-soft:#33290F;
  --live:#6FBF7E;--live-soft:#1C2E20;--slate:#93A5A8;--line:#2A3437;--code-bg:#212B2E;}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--body);font-feature-settings:"kern"}
a{color:var(--petrol);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.1;margin:0 0 16px;text-wrap:balance;letter-spacing:-.01em}
h1{font-size:clamp(36px,5.2vw,56px);font-variation-settings:"opsz" 96}
h2{font-size:clamp(28px,3.4vw,36px);font-variation-settings:"opsz" 60}
h3{font-size:22px;font-variation-settings:"opsz" 24;margin-bottom:8px}
p{margin:0 0 16px}
.small{font-size:14px}.muted{color:var(--slate)}
.eyebrow{display:block;font:600 12px/1.4 var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--petrol);margin-bottom:12px}
.lead{font-size:clamp(18px,1.6vw,21px);line-height:1.5;max-width:var(--prose);color:var(--ink)}
.prose{max-width:var(--prose)}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:24px}
section{padding-block:72px}
@media (max-width:720px){section{padding-block:48px}.wrap{padding-inline:16px}}
.skip{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 12px;border:1px solid var(--line);border-radius:var(--r)}
.skip:focus{left:8px;z-index:20}

/* header */
.top{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:10}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:8px;font:600 18px/1 var(--body);color:var(--navy);text-decoration:none}
:root[data-theme="dark"] .brand{color:var(--ink)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .brand{color:var(--ink)}}
.brand svg{width:26px;height:26px}
.sub{font:600 15px var(--body);color:var(--petrol);text-decoration:none;padding:4px 10px;border:1px solid var(--petrol);border-radius:999px;white-space:nowrap}
.sub[aria-current]{background:var(--petrol);color:#fff}
.nav{display:flex;gap:20px;margin-left:auto;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;font-size:15px;font-weight:500;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current]{border-bottom-color:var(--petrol)}
.menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:var(--r);padding:8px 12px;font:500 14px var(--body);color:var(--ink)}
.mnav[hidden]{display:none}
.mnav{display:flex;flex-direction:column;border-top:1px solid var(--line);padding:8px 16px 16px}
.mnav a{padding:12px 0;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line);font-weight:500}
@media (max-width:900px){.nav,.top .sub{display:none}.menu{display:inline-flex;align-items:center;min-height:44px;margin-left:8px}.top .top-cta{margin-left:auto;min-height:40px}}
@media (min-width:901px){.mnav{display:none!important}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 20px;border-radius:var(--r);font:600 15px var(--body);text-decoration:none;border:1px solid transparent;cursor:pointer}
.btn.small{min-height:36px;padding:6px 14px;font-size:14px}
.btn.pri{background:var(--petrol);color:#fff;border-color:var(--petrol)}
.btn.pri:hover{filter:brightness(.92)}
.btn.sec{background:var(--card);color:var(--ink);border-color:var(--line)}
.btn.sec:hover{border-color:var(--slate)}
.btn:focus-visible{outline:2px solid var(--petrol);outline-offset:2px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}

/* hero */
.hero{padding-block:88px 40px}
.hero h1{max-width:820px}
@media (max-width:720px){.hero{padding-block:48px 24px}}

/* layouts */
.two{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:start}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
@media (max-width:960px){.grid4,.strip{grid-template-columns:repeat(2,minmax(0,1fr))}.grid3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:720px){.two,.grid2,.grid3,.grid4,.strip{grid-template-columns:minmax(0,1fr)}.two{gap:16px}}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.card h3{margin-top:4px}
.card p:last-child{margin-bottom:0}
.card .eyebrow{margin-bottom:6px}
.proof{display:flex;flex-direction:column;gap:8px}
.proof .date{font:500 13px var(--mono);color:var(--slate)}
.proof strong{font-weight:500;line-height:1.4}
.proof .measure{font:600 24px/1.2 var(--mono);color:var(--ink);font-variant-numeric:tabular-nums;margin-top:4px}
.proof .foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding-top:8px;font-size:14px}
.tag{display:inline-block;font:600 12px/1 var(--body);padding:5px 9px;border-radius:999px;white-space:nowrap}
.tag.live{background:var(--live-soft);color:var(--live)}
.tag.built{background:var(--petrol-soft);color:var(--petrol)}
.tag.pending{background:var(--amber-soft);color:var(--amber)}

/* band */
.band{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band .card{background:var(--paper)}

/* rules */
.rules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:8px}
.rules>div{display:flex;gap:16px;align-items:flex-start}
.rules .n{flex:none;width:36px;height:36px;border-radius:50%;background:var(--petrol);color:#fff;font:600 16px var(--mono);display:grid;place-items:center}
.rules h3{font-size:22px}
.rules p{margin:0;color:var(--slate)}
@media (max-width:900px){.rules{grid-template-columns:minmax(0,1fr)}}

/* offer path */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:8px 0 24px}
.step{display:flex;flex-direction:column;gap:8px;padding:24px;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
.step .num{width:32px;height:32px;border-radius:50%;background:var(--petrol);color:#fff;font:600 15px var(--mono);display:grid;place-items:center}
.step strong{font-family:var(--display);font-size:22px;font-weight:600}
.step p{margin:0;color:var(--slate)}
.step .price{font:500 13px var(--mono);color:var(--petrol);margin-top:auto;padding-top:8px}
@media (max-width:900px){.steps{grid-template-columns:minmax(0,1fr)}}

/* timeline */
.timeline{list-style:none;margin:0;padding:0;max-width:var(--prose);counter-reset:s}
.timeline li{position:relative;padding:0 0 32px 56px;counter-increment:s;border-left:1px solid var(--line);margin-left:18px}
.timeline li::before{content:counter(s);position:absolute;left:-19px;top:0;width:36px;height:36px;border-radius:50%;background:var(--petrol);color:#fff;font:600 15px var(--mono);display:grid;place-items:center}
.timeline li:last-child{border-left-color:transparent}
.timeline p{margin:0;color:var(--slate)}

/* ledger */
.ledger{background:var(--code-bg);border-radius:var(--r);padding:14px 16px;font:400 14px/1.6 var(--mono);overflow-x:auto;white-space:pre-wrap;word-break:break-word;margin:0 0 12px}
.ledger .t{color:var(--slate);margin-right:12px}
.ledger .ref{color:var(--amber)}

/* triplet */
.triplet{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,5fr) minmax(0,4fr);gap:24px;padding:24px 0;border-top:1px solid var(--line);align-items:start}
.triplet:last-of-type{border-bottom:1px solid var(--line)}
.triplet q{font-family:var(--display);font-size:22px;line-height:1.25;color:var(--slate);quotes:"\201C" "\201D"}
.triplet p{margin:0}
.triplet .proof{padding:0;border:0;background:none}
@media (max-width:900px){.triplet{grid-template-columns:minmax(0,1fr);gap:12px}}

/* diagram */
.diagram{max-width:100%;overflow-x:auto;color:var(--ink)}
.diagram svg{width:100%;min-width:640px;height:auto;display:block}

/* form */
.f{display:flex;flex-direction:column;gap:16px;max-width:520px}
.f label{display:flex;flex-direction:column;gap:6px;font:500 14px var(--body)}
.f input,.f select,.f textarea{min-height:44px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);color:var(--ink);font:400 16px var(--body)}
.f textarea{min-height:110px;resize:vertical}
.f input:focus,.f select:focus,.f textarea:focus{outline:2px solid var(--petrol);outline-offset:1px;border-color:var(--petrol)}
.f .btn{align-self:flex-start}

/* footer */
footer{background:var(--navy);color:#DCE3E6;padding-block:56px 32px;margin-top:24px}
footer .brand{color:#fff}
footer .brand svg{color:var(--teal-mark)}
footer a{color:#fff}
footer .eyebrow{color:var(--teal-mark)}
.fcols{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,3fr) minmax(0,4fr);gap:32px}
.fcols>div{display:flex;flex-direction:column;gap:8px}
.fcols .small{color:#B7C2C7}
.fineprint{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.15);font-size:13px;color:#B7C2C7;max-width:var(--prose)}
@media (max-width:720px){.fcols{grid-template-columns:minmax(0,1fr)}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* founder signature */
.sig{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);font:500 17px/1.5 var(--body)}
.sig a{color:var(--petrol)}

/* product screenshots */
.shot{margin:12px 0 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--card)}
.shot img{display:block;width:100%;height:auto;border-radius:0}
.shot figcaption{padding:8px 12px;font:500 12.5px var(--mono);color:var(--slate);border-top:1px solid var(--line);background:var(--paper)}
.card .shot{margin-top:14px}

/* homepage product image: sharp 2x capture on a quiet stage */
.hero-shot{margin:32px 0 0}
.hero-shot__stage{background:var(--petrol-soft);border-radius:10px;padding:clamp(12px,3vw,36px) clamp(12px,3vw,36px) 0;overflow:hidden}
.hero-shot__stage picture,.hero-shot__stage img{display:block;width:100%;height:auto}
.hero-shot__stage img{border:1px solid var(--line);border-bottom:0;border-radius:8px 8px 0 0;box-shadow:0 1px 2px rgba(11,33,56,.06),0 12px 32px -12px rgba(11,33,56,.18)}
.hero-shot figcaption{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:12px;font:500 12.5px/1.4 var(--mono);color:var(--slate)}
@media (max-width:720px){.hero-shot figcaption{flex-direction:column;gap:2px}}
.hero-shot__more{margin-top:20px}
@media (max-width:720px){
  .hero-shot__stage{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-right:12px}
  .hero-shot__stage picture{width:680px;max-width:none}
  .hero-shot figcaption span:first-child::after{content:" · swipe to see more";color:var(--slate)}
}

/* demonstration result card + expandable evidence */
.result-card{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:8px}
.result-card>div{background:var(--card);padding:20px 24px}
.result-card p{margin:0}
.result-card .tag{margin-right:6px;vertical-align:1px}
@media (max-width:720px){.result-card{grid-template-columns:minmax(0,1fr)}}
.evidence{margin-top:16px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:0 20px}
.evidence summary{cursor:pointer;padding:14px 0;font-weight:600;color:var(--petrol);list-style-position:inside}
.evidence[open] summary{border-bottom:1px solid var(--line);margin-bottom:12px}
.evidence .ledger{margin:8px 0 12px}
.transcript .prose{padding-bottom:12px}
.transcript .prose p{margin:0 0 12px;max-width:68ch}

/* enterprise lens section */
.enterprise{border-top:1px solid var(--line)}
.ent-grid{margin-top:28px;gap:32px 40px}
.ent-grid>div{border-top:2px solid var(--petrol);padding-top:16px}
.ent-grid h3{font-size:20px;margin-bottom:6px}
.ent-grid p{margin:0;color:var(--slate)}

.copyline{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:8px}
.copyline code{font:500 18px var(--mono);background:var(--code-bg);padding:8px 12px;border-radius:var(--r);user-select:all}

/* click to enlarge */
.hero-shot img,.shot img{cursor:zoom-in}
.hero-shot img:focus-visible,.shot img:focus-visible{outline:2px solid var(--petrol);outline-offset:3px}
dialog.zoom{max-width:min(96vw,1600px);width:96vw;padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink)}
dialog.zoom::backdrop{background:rgba(11,33,56,.72)}
dialog.zoom img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:6px}
dialog.zoom p{margin:10px 0 0;font:500 12.5px var(--mono);color:var(--slate)}
.zoom__close{display:block;margin:0 0 10px auto;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:6px 12px;font:600 14px var(--body);color:var(--ink);cursor:pointer}

.worklist{margin:0 0 16px;padding-left:20px}
.worklist li{margin:6px 0}

/* mobile refinements */
@media (max-width:720px){
  body{font-size:16px}
  .top .wrap{min-height:60px;gap:8px}
  .brand{min-height:44px}
  .mnav a{min-height:48px;display:flex;align-items:center}
  footer a{display:inline-flex;align-items:center;min-height:44px}
  .fcols>div{gap:0}
  .card{padding:20px}
  .ent-grid{gap:24px}
  .grid2,.grid3,.grid4{gap:16px}
  .hero{padding-block:36px 20px}
  section{padding-block:40px}
  .ctas .btn{flex:1 1 auto}
  .hero-shot figcaption,.shot figcaption{font-size:13px}
  .result-card>div{padding:16px 18px}
  .ledger{font-size:13px}
  .copyline code{font-size:16px}
}
@media (max-width:360px){ .top .top-cta{padding-inline:12px} h1{font-size:32px} }
@media (max-width:900px){ .top .btn.top-cta{min-height:44px;padding-inline:14px} }

/* demonstration video */
.video{margin:24px 0 0}
.video video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#0B2138;border:1px solid var(--line);border-radius:10px}
.video figcaption{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:10px;font:500 12.5px/1.4 var(--mono);color:var(--slate)}
.video-summary{margin-top:18px}
/* video player */
.video__frame{position:relative;border-radius:10px;overflow:hidden;background:#0B2138;border:1px solid var(--line)}
.video__frame video{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:16/9;border:0;border-radius:0;background:#0B2138}
.video__play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:16px;border:0;cursor:pointer;
  background:linear-gradient(to top,rgba(11,33,56,.55),rgba(11,33,56,.15));color:#fff;font:600 clamp(16px,2.2vw,22px)/1.2 var(--body);text-align:left}
.video__play small{font:500 13px var(--mono);opacity:.85}
.video__icon{width:clamp(56px,8vw,84px);height:clamp(56px,8vw,84px);border-radius:50%;background:var(--petrol);position:relative;flex:none;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.video__icon::after{content:"";position:absolute;left:54%;top:50%;transform:translate(-50%,-50%);border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff}
.video__play:hover .video__icon,.video__play:focus-visible .video__icon{filter:brightness(1.1)}
.video__play:focus-visible{outline:3px solid #5EEAD4;outline-offset:-3px}
.video__play[hidden]{display:none}
video::cue{font-family:"Public Sans",Arial,sans-serif;background:rgba(11,33,56,.85);color:#fff}
.ladder{margin:0 0 16px;padding-left:22px}
.ladder li{margin:6px 0}
.hero-who{margin:22px 0 0;max-width:62ch;font-size:15px;color:var(--slate)}
/* evidence split: result card beside a tall screenshot */
.evidence-split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:28px;align-items:start;margin-top:8px}
.evidence-split .shot{margin:0}
.result-card--stack{grid-template-columns:minmax(0,1fr)}
@media (max-width:860px){.evidence-split{grid-template-columns:minmax(0,1fr)}}