/* HEAT Enterprises — design system
   Typography: Fraunces (display/serif) + Inter (body/UI). Two families only.
   Palette: near-black neutrals. Red is reserved for the logo mark — never used in UI chrome. */

:root{
  --bg: #0d0d0c;
  --panel: #131311;
  --panel-2: #17170f14;
  --ink: #f2f0ea;
  --ink-dim: #a8a49a;
  --ink-faint: #847f75;
  --hairline: rgba(242,240,234,0.14);
  --hairline-strong: rgba(242,240,234,0.24);
  --radius-sm: 4px;
  --radius-md: 10px;
  --content-max: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
}
a{color:inherit;}
img{max-width:100%;display:block;}
.serif{font-family:'Fraunces',serif;}

.wrap{max-width:var(--content-max);margin:0 auto;padding:0 48px;}
@media (max-width:640px){.wrap{padding:0 24px;}}

/* ---------- Nav ---------- */
header{
  position:sticky;top:0;z-index:20;
  background:rgba(13,13,12,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--hairline);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;padding:18px 0;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand-plate{background:#f7f6f2;border-radius:6px;padding:5px 7px;display:flex;align-items:center;justify-content:center;}
.brand-plate img{height:20px;width:auto;display:block;}
.brand-name{font-size:13px;letter-spacing:0.13em;text-transform:uppercase;color:var(--ink);}
nav.links{display:flex;gap:36px;font-size:14px;color:var(--ink-dim);}
nav.links a{text-decoration:none;border-bottom:1px solid transparent;padding-bottom:2px;transition:border-color .2s,color .2s;}
nav.links a:hover{color:var(--ink);border-color:var(--hairline-strong);}
@media (max-width:760px){nav.links{display:none;}}
@media (max-width:420px){
  .brand-name{display:none;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Inter',sans-serif;font-size:13.5px;font-weight:500;
  padding:12px 20px;border-radius:var(--radius-sm);
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:opacity .2s, background .2s, border-color .2s;
}
.btn-primary{background:var(--ink);color:var(--bg);}
.btn-primary:hover{opacity:0.86;}
.btn-secondary{border-color:var(--hairline-strong);color:var(--ink);background:transparent;}
.btn-secondary:hover{border-color:var(--ink-dim);}
@media (max-width:420px){.btn{padding:10px 15px;font-size:12.5px;}}

/* ---------- Hero ---------- */
.hero{padding:108px 0 0;text-align:center;}
@media (max-width:640px){.hero{padding:64px 0 0;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:0.13em;text-transform:uppercase;color:var(--ink-dim);
  margin-bottom:26px;
}
.eyebrow .dot{width:5px;height:5px;border-radius:50%;background:var(--ink-dim);}
h1.display{
  font-family:'Fraunces',serif;font-weight:500;
  font-size:clamp(36px,5.6vw,72px);line-height:1.06;letter-spacing:-0.01em;
  max-width:800px;margin:0 auto 24px;
}
h1.display em{font-style:italic;font-weight:500;}
.hero-sub{font-size:17.5px;color:var(--ink-dim);max-width:500px;margin:0 auto 36px;line-height:1.6;}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-bottom:80px;flex-wrap:wrap;}
@media (max-width:640px){.hero-actions{margin-bottom:56px;}}

/* ---------- Section scaffolding (numbered, editorial) ---------- */
.section{padding:96px 0;border-top:1px solid var(--hairline);}
@media (max-width:640px){.section{padding:60px 0;}}
.section-label{
  display:flex;align-items:baseline;gap:14px;margin-bottom:20px;
}
.section-label .num{font-family:'Fraunces',serif;font-style:italic;color:var(--ink-dim);font-size:15px;}
.section-label .tag{font-size:12px;letter-spacing:0.12em;text-transform:uppercase;color:var(--ink-dim);}
.section-head{max-width:640px;margin:0 auto 52px;text-align:center;}
.section-head h2{
  font-family:'Fraunces',serif;font-weight:500;font-size:clamp(26px,3.2vw,38px);
  margin:0 0 14px;letter-spacing:-0.01em;
}
.section-head p{color:var(--ink-dim);font-size:15.5px;margin:0;line-height:1.65;}

/* ---------- Device frame (website preview) ---------- */
.device{
  max-width:960px;margin:0 auto;
  border:1px solid var(--hairline-strong);border-radius:var(--radius-md);
  background:var(--panel);overflow:hidden;
}
.device-bar{
  display:flex;align-items:center;gap:7px;padding:13px 18px;
  border-bottom:1px solid var(--hairline);
}
.device-bar span{width:8px;height:8px;border-radius:50%;border:1px solid var(--hairline-strong);}
.device-body{display:grid;grid-template-columns:1.05fr 0.95fr;gap:0;}
@media (max-width:700px){.device-body{grid-template-columns:1fr;}}
.device-copy{padding:40px;border-right:1px solid var(--hairline);}
@media (max-width:700px){.device-copy{border-right:none;border-bottom:1px solid var(--hairline);}}
.concept-tag{
  display:inline-block;font-size:10.5px;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--ink-dim);border:1px solid var(--hairline-strong);padding:5px 9px;border-radius:3px;
  margin-bottom:16px;
}
.device-copy .device-name{font-family:'Fraunces',serif;font-size:22px;font-weight:500;margin:0 0 10px;}
.device-copy p{color:var(--ink-dim);font-size:14px;margin:0;line-height:1.65;}
.device-visual{
  position:relative;overflow:hidden;min-height:220px;background:var(--panel);
}
.device-embed{
  position:absolute;top:0;left:0;width:1280px;height:900px;border:0;
  transform:scale(0.36);transform-origin:top left;pointer-events:none;
}

/* ---------- Work grid ---------- */
.work-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:900px;margin:0 auto;}
@media (max-width:760px){.work-grid{grid-template-columns:1fr;}}
.work-card{
  display:block;text-decoration:none;color:inherit;
  border:1px solid var(--hairline-strong);border-radius:var(--radius-md);overflow:hidden;
  background:var(--panel);transition:border-color .2s;
}
.work-card:hover{border-color:var(--ink-dim);}
.work-preview{position:relative;overflow:hidden;height:190px;border-bottom:1px solid var(--hairline);background:#000;}
.work-preview iframe{
  position:absolute;top:0;left:0;width:1280px;height:900px;border:0;
  transform:scale(0.34);transform-origin:top left;pointer-events:none;
}
.work-info{padding:22px 24px 26px;}
.work-info h3{font-size:19px;font-weight:500;margin:12px 0 8px;}
.work-info p{font-size:13.5px;color:var(--ink-dim);margin:0;line-height:1.6;}

/* ---------- Demo section ---------- */
.demo-panel{max-width:660px;margin:0 auto;border:1px solid var(--hairline-strong);border-radius:var(--radius-md);overflow:hidden;background:var(--panel);}
.demo-tabs{display:flex;border-bottom:1px solid var(--hairline);}
.demo-tab{
  flex:1;text-align:center;padding:16px;font-size:13.5px;font-weight:500;color:var(--ink-dim);
  background:none;border:none;font-family:'Inter',sans-serif;cursor:pointer;
  border-bottom:2px solid transparent;margin-bottom:-1px;
  transition:color .2s, border-color .2s;
}
.demo-tab.active{color:var(--ink);border-bottom-color:var(--ink);}
.demo-body{padding:32px;}
.chat-row{display:flex;margin-bottom:12px;}
.chat-row.self{justify-content:flex-end;}
.chat-bubble{
  border:1px solid var(--hairline);border-radius:var(--radius-sm);
  padding:12px 14px;font-size:13.5px;max-width:80%;background:transparent;
  opacity:0;transform:translateY(6px);
  animation:bubbleIn .5s ease forwards;
}
.chat-row.self .chat-bubble{background:var(--ink);color:var(--bg);border-color:var(--ink);}
@keyframes bubbleIn{to{opacity:1;transform:translateY(0);}}
.demo-foot{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:16px;padding-top:16px;border-top:1px solid var(--hairline);
}
.demo-foot .meta{font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-faint);}
.replay-btn{
  font-size:12.5px;color:var(--ink-dim);border:1px solid var(--hairline-strong);
  padding:7px 13px;border-radius:var(--radius-sm);background:none;font-family:'Inter',sans-serif;cursor:pointer;
  transition:color .2s, border-color .2s;
}
.replay-btn:hover{color:var(--ink);border-color:var(--ink-dim);}

/* scroll reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease, transform .6s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* ---------- Approach list (reused editorial numbered rows) ---------- */
.approach-list{max-width:760px;margin:0 auto;border-top:1px solid var(--hairline);}
.approach-item{
  display:grid;grid-template-columns:64px 1fr 1.3fr;gap:24px;
  padding:28px 0;border-bottom:1px solid var(--hairline);align-items:baseline;
}
@media (max-width:640px){.approach-item{grid-template-columns:36px 1fr;}
  .approach-item .approach-desc{grid-column:2;margin-top:4px;}}
.approach-num{font-family:'Fraunces',serif;font-style:italic;color:var(--ink-dim);font-size:16px;}
.approach-title{font-size:15.5px;font-weight:600;}
.approach-desc{color:var(--ink-dim);font-size:14.5px;line-height:1.6;}

/* ---------- Founders ---------- */
.founders-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;max-width:760px;margin:0 auto;}
@media (max-width:640px){.founders-grid{grid-template-columns:1fr;gap:40px;}}
.founder-card{text-align:center;}
.founder-photo{
  aspect-ratio:4/5;width:100%;max-width:240px;margin:0 auto 20px;
  border:1px solid var(--hairline-strong);border-radius:var(--radius-md);
  overflow:hidden;background:var(--panel);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
}
.founder-photo img{width:100%;height:100%;object-fit:cover;object-position:center top;display:block;}
.founder-photo span.serif{font-size:34px;color:var(--ink-dim);font-style:italic;}
.founder-photo small{font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-faint);}
.founder-card h3{font-size:19px;font-weight:500;margin:0 0 4px;}
.founder-role{font-size:12.5px;letter-spacing:0.05em;text-transform:uppercase;color:var(--ink-dim);margin:0 0 10px;}
.founder-bio{font-size:14px;color:var(--ink-dim);margin:0;line-height:1.6;}

/* ---------- Contact form ---------- */
.contact-form{max-width:640px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:22px 20px;}
.form-row{display:flex;flex-direction:column;gap:7px;}
.form-row-full{grid-column:1 / -1;}
@media (max-width:640px){.contact-form{grid-template-columns:1fr;}}
.form-row label{font-size:13px;color:var(--ink-dim);}
.form-row label .optional{color:var(--ink-faint);}
.form-row input, .form-row select, .form-row textarea{
  font-family:'Inter',sans-serif;font-size:14.5px;color:var(--ink);
  background:var(--panel);border:1px solid var(--hairline-strong);border-radius:var(--radius-sm);
  padding:11px 13px;transition:border-color .2s, box-shadow .2s;
}
.form-row input:focus-visible, .form-row select:focus-visible, .form-row textarea:focus-visible{
  border-color:var(--ink-dim);outline:2px solid var(--ink);outline-offset:1px;
}
.form-row textarea{resize:vertical;min-height:96px;}
.form-row.has-error input, .form-row.has-error select, .form-row.has-error textarea{border-color:#c25c4e;}
.field-error{font-size:12px;color:#c9897c;min-height:14px;}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;gap:16px;margin-top:6px;}
.form-status{font-size:13.5px;color:var(--ink-dim);}
.form-status.success{color:#8fbf9f;}
.form-status.error{color:#c9897c;}
.btn[disabled]{opacity:0.6;cursor:default;}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--hairline);padding:40px 0;margin-top:40px;}
.footer-row{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.footer-contact{display:flex;gap:20px;font-size:13.5px;color:var(--ink-dim);}
.footer-contact a{text-decoration:none;}
.footer-contact a:hover{color:var(--ink);}
.footer-meta{font-size:12.5px;color:var(--ink-faint);}