/* ============================================================
   LINC — pre-launch landing page
   palette: cyan #00d4e8 on deep navy #060c10
   ============================================================ */

*{box-sizing:border-box;margin:0;padding:0}

:root{
  --cyan:#00d4e8;
  --cyan-dim:#00a8b8;
  --cyan-faint:#008898;
  --navy:#060c10;
  --navy-deep:#02060a;
  --ink:#b8e0e8;
  --ink-soft:#80c0c8;
  --mute:#1a4050;
  --mute-2:#1a3a48;
  --line:#0a1e28;
  --card-line:#0d2a38;
}

html{scroll-behavior:smooth}
body{
  background:var(--navy-deep);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
.wrap{max-width:680px;margin:0 auto}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:50;
  display:flex;justify-content:space-between;align-items:center;
  padding:14px 24px;
  background:rgba(6,12,16,0.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:0.5px solid #0d1e24;
}
.nav-logo{font-size:17px;font-weight:500;color:#c8f0f4;letter-spacing:0.08em}
.nav-logo em,.foot-logo em,h1 em{color:var(--cyan);font-style:normal}
.nav-links{display:flex;gap:18px;align-items:center}
.nav-link{font-size:12px;color:var(--mute-2);transition:color .2s}
.nav-link:hover{color:var(--cyan-dim)}
.nav-cta{
  font-size:12px;background:#031820;color:var(--cyan);
  border:0.5px solid var(--cyan);border-radius:6px;padding:6px 13px;
  cursor:pointer;transition:background .2s,box-shadow .2s;
}
.nav-cta:hover{background:#04222e;box-shadow:0 0 14px rgba(0,212,232,0.25)}
.nav-burger{display:none;background:none;border:none;cursor:pointer;padding:6px;flex-direction:column;gap:4px}
.nav-burger span{display:block;width:20px;height:1.5px;background:var(--cyan-dim);transition:transform .25s,opacity .25s}
.nav-burger.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ---------- apartment hero ---------- */
.apt{
  position:relative;
  height:100vh;height:100svh;
  min-height:520px;
  background:#07111a;
  overflow:hidden;
}
#scene{position:absolute;inset:0;width:100%;height:100%;display:block}

.stage-tag{
  position:absolute;top:18px;left:20px;z-index:5;
  background:rgba(3,20,30,0.9);border:0.5px solid #0d3040;border-radius:12px;
  padding:5px 12px;font-size:11px;color:#00b8cc;letter-spacing:0.06em;
}

.hud{position:absolute;top:18px;right:20px;z-index:5;display:flex;flex-direction:column;gap:6px}
.hud-card{
  background:rgba(4,12,20,0.92);border:0.5px solid var(--card-line);
  border-radius:7px;padding:6px 12px;min-width:104px;
}
.hud-val{font-size:16px;font-weight:500;color:var(--cyan);font-variant-numeric:tabular-nums}
.hud-lbl{font-size:9px;color:#2a5a70;letter-spacing:0.05em;text-transform:lowercase}

/* room furniture — DOM layer above the Three.js window scene */
.room{position:absolute;inset:0;z-index:3;pointer-events:none}
.floor{
  position:absolute;bottom:0;left:0;right:0;height:14vh;min-height:80px;
  background:#06101a;border-top:0.5px solid #0d2030;
}

.couch{
  position:absolute;bottom:calc(14vh - 2px);left:50%;transform:translateX(-50%);
  width:min(340px,60vw);height:96px;
  background:#0d1e2a;border-radius:14px 14px 0 0;border:0.5px solid #122430;
}
.couch-back{position:absolute;top:-28px;left:0;right:0;height:34px;background:#0f2230;border-radius:10px 10px 0 0;border:0.5px solid #152840}
.couch-cushion{position:absolute;top:10px;left:12px;right:12px;height:46px;background:#102030;border-radius:7px;border:0.5px solid #152a3a}
.couch-arm{position:absolute;top:-28px;width:24px;height:124px;background:#0d1e2a;border:0.5px solid #122430}
.couch-arm-l{left:-22px;border-radius:10px 0 0 0}
.couch-arm-r{right:-22px;border-radius:0 10px 0 0}

.link-cat{
  position:absolute;bottom:calc(14vh + 76px);left:50%;transform:translateX(-50%);
  width:76px;
}
.link-svg{width:100%;height:auto;animation:breathe 4s ease-in-out infinite;transform-origin:bottom center}
.link-collar{animation:collar-pulse 2.5s ease-in-out infinite}
.link-eye{animation:blink 6s infinite}

.bowl-area{
  position:absolute;bottom:calc(14vh + 4px);right:18%;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  pointer-events:auto;
}
.bowl-rim{width:52px;height:7px;background:#0a2030;border-radius:4px;border:0.5px solid #0d3040}
.bowl-body{width:44px;height:20px;background:#08161e;border:0.5px solid #0d3040;border-radius:0 0 22px 22px;overflow:hidden;position:relative}
.bowl-liquid{
  position:absolute;bottom:0;left:0;right:0;height:0%;
  background:var(--cyan);border-radius:0 0 20px 20px;
  transition:height 0.8s ease;
  box-shadow:0 0 10px rgba(0,212,232,0.5);
}
.bowl-lbl{font-size:9px;color:#2a5a70;text-align:center;line-height:1.3;margin-top:2px}

.plant-wrap{position:absolute;bottom:14vh;right:36%}
.plant-stem{position:relative;width:3px;height:84px;background:#091a0e;margin-left:14px}
.plant-leaf{position:absolute;width:26px;height:11px;background:#091a0e;border-radius:50%}
.plant-pot{width:32px;height:22px;background:#0a1520;border:0.5px solid #102030;border-radius:0 0 6px 6px;margin-top:-1px}

.table{
  position:absolute;bottom:calc(14vh - 2px);left:12%;
  width:130px;height:44px;background:#08121a;
  border-radius:65px 65px 0 0;border:0.5px solid #0d1e28;
}

.scroll-hint{
  position:absolute;bottom:18px;left:50%;transform:translateX(-50%);z-index:5;
  color:#1a4a5a;font-size:16px;animation:hint-bob 2.2s ease-in-out infinite;
}

/* ---------- hero copy ---------- */
.hero{padding:64px 24px 56px;background:var(--navy);border-top:0.5px solid var(--line)}
.eyebrow{font-size:11px;color:#00707e;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:12px}
h1{font-size:clamp(26px,4.5vw,40px);font-weight:500;color:var(--ink);line-height:1.3;margin-bottom:14px}
.sub{font-size:15px;color:var(--mute);line-height:1.7;margin-bottom:26px;max-width:520px}
.btns{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.btn-main{
  font-size:14px;background:#031820;color:var(--cyan);
  border:0.5px solid var(--cyan);border-radius:8px;padding:12px 22px;
  cursor:pointer;font-weight:500;display:inline-block;
  transition:background .2s,box-shadow .2s;
}
.btn-main:hover{background:#04222e;box-shadow:0 0 18px rgba(0,212,232,0.3)}
.btn-sec{font-size:14px;color:var(--mute);cursor:pointer;transition:color .2s}
.btn-sec:hover{color:var(--cyan-dim)}

.divider{height:0.5px;background:var(--line)}

/* ---------- demo section ---------- */
.demo-sec{background:#050b10;padding:56px 24px}
.sec-title{font-size:19px;font-weight:500;color:var(--cyan-dim);margin-bottom:6px}
.sec-sub{font-size:14px;color:var(--mute-2);margin-bottom:22px;line-height:1.6}

.upload-box{
  position:relative;
  border:1px dashed var(--card-line);border-radius:12px;
  padding:38px 20px;text-align:center;background:#040810;
  cursor:pointer;outline:none;
  transition:border-color .2s,background .2s;
}
.upload-box:hover,.upload-box:focus-visible,.upload-box.dragover{border-color:var(--cyan-faint);background:#050c14}
.upload-icon{font-size:30px;color:var(--card-line);margin-bottom:10px}
.upload-txt{font-size:14px;color:#2a4a58}
.upload-txt span{color:var(--cyan-faint)}
.upload-note{font-size:11px;color:#123040;margin-top:8px}
.upload-soon{
  display:none;margin-top:16px;font-size:13px;color:var(--cyan);
  letter-spacing:0.04em;
}
.upload-soon.show{display:block;animation:soon-in .4s ease}

/* example result card */
.result-card{
  margin-top:22px;background:#040c12;border:0.5px solid var(--card-line);
  border-radius:12px;overflow:hidden;
}
.result-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:9px 16px;border-bottom:0.5px solid var(--line);
}
.result-label{font-size:10px;color:#2a5a70;letter-spacing:0.1em;text-transform:uppercase}
.result-live-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:collar-pulse 2.5s infinite}
.result-body{display:flex;gap:16px;padding:16px;align-items:center}
.result-thumb{
  width:64px;height:64px;flex-shrink:0;border-radius:9px;
  background:#07111a;border:0.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;
}
.result-info{flex:1;min-width:0}
.result-behavior{font-size:17px;font-weight:500;color:var(--cyan);margin-bottom:8px}
.result-conf-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.result-conf-bar{flex:1;max-width:180px;height:5px;background:#081824;border-radius:3px;overflow:hidden}
.result-conf-fill{height:100%;background:var(--cyan);border-radius:3px;box-shadow:0 0 8px rgba(0,212,232,0.5)}
.result-conf-val{font-size:11px;color:#2a5a70;white-space:nowrap}
.result-correct{font-size:11px;color:#123040}
.result-correct span{color:var(--cyan-faint);cursor:pointer}

/* ---------- email capture ---------- */
.email-sec{background:#040a0e;padding:56px 24px;border-top:0.5px solid var(--line)}
.founding-pill{
  display:inline-block;background:#031520;border:0.5px solid var(--card-line);
  border-radius:12px;padding:4px 13px;font-size:11px;color:#007888;
  margin-bottom:14px;letter-spacing:0.05em;
}
.email-h{font-size:22px;font-weight:500;color:var(--ink-soft);margin-bottom:7px}
.email-sub{font-size:14px;color:#1a3040;margin-bottom:20px;line-height:1.6;max-width:480px}
.email-row{display:flex;gap:10px;max-width:440px}
.email-in{
  flex:1;min-width:0;background:#040e14;border:0.5px solid #0d2030;border-radius:8px;
  padding:12px 14px;font-size:14px;color:var(--cyan);outline:none;
  transition:border-color .2s;font-family:inherit;
}
.email-in::placeholder{color:#123040}
.email-in:focus{border-color:var(--cyan-faint)}
.email-btn{
  background:#031820;color:var(--cyan);border:0.5px solid var(--cyan);
  border-radius:8px;padding:12px 18px;font-size:14px;cursor:pointer;
  white-space:nowrap;font-family:inherit;transition:background .2s,box-shadow .2s,opacity .2s;
}
.email-btn:hover{background:#04222e;box-shadow:0 0 14px rgba(0,212,232,0.25)}
.email-btn:disabled{opacity:0.45;cursor:default;box-shadow:none}
.email-msg{font-size:13px;margin-top:12px;min-height:18px}
.email-msg.ok{color:var(--cyan)}
.email-msg.err{color:#e86a6a}
.email-note{font-size:11px;color:#0d2430;margin-top:8px}

/* ---------- content pages (privacy / terms / contact) ---------- */
.page-sec{background:var(--navy);min-height:calc(100vh - 120px);padding:56px 24px 72px}
.page-sec .wrap{max-width:640px}
.page-title{font-size:clamp(22px,3.5vw,30px);font-weight:500;color:var(--ink);margin-bottom:8px}
.page-title em{color:var(--cyan);font-style:normal}
.page-updated{font-size:11px;color:#123040;margin-bottom:32px;letter-spacing:0.05em}
.page-sec h2{font-size:15px;font-weight:500;color:var(--cyan-dim);margin:30px 0 8px}
.page-sec p{font-size:14px;color:var(--mute);line-height:1.75;margin-bottom:10px}
.page-sec ul{margin:6px 0 10px 18px}
.page-sec li{font-size:14px;color:var(--mute);line-height:1.75;margin-bottom:4px}
.page-sec strong{color:var(--ink-soft);font-weight:500}
.page-sec a{color:var(--cyan-faint);transition:color .2s}
.page-sec a:hover{color:var(--cyan)}
.contact-card{
  display:block;background:#040c12;border:0.5px solid var(--card-line);
  border-radius:12px;padding:18px 20px;margin-bottom:14px;
}
.contact-card-lbl{font-size:10px;color:#2a5a70;letter-spacing:0.1em;text-transform:uppercase;margin-bottom:5px}
.contact-card-val{font-size:16px;color:var(--cyan)}
.contact-card-note{font-size:12px;color:#1a3a48;margin-top:5px}

/* ---------- footer ---------- */
footer{
  background:#03080c;padding:18px 24px;border-top:0.5px solid #08181e;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
}
.foot-logo{font-size:12px;color:#1a3646}
.foot-links{display:flex;gap:16px}
.foot-link{font-size:11px;color:#122a38;transition:color .2s}
.foot-link:hover{color:var(--cyan-faint)}

/* ---------- scroll fade-in ---------- */
.fade-in{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.fade-in.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .fade-in{opacity:1;transform:none;transition:none}
  .link-svg,.link-collar,.scroll-hint,.result-live-dot{animation:none !important}
  html{scroll-behavior:auto}
}

/* ---------- animations ---------- */
@keyframes collar-pulse{0%,100%{opacity:0.7}50%{opacity:1}}
@keyframes breathe{0%,100%{transform:scaleY(1)}50%{transform:scaleY(1.025)}}
@keyframes blink{0%,46%,50%,100%{transform:none}48%{transform:scaleY(0.1)}}
@keyframes hint-bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,6px)}}
@keyframes soon-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- mobile ---------- */
@media (max-width:640px){
  .nav-burger{display:flex}
  .nav-links{
    display:none;position:absolute;top:100%;right:0;left:0;
    flex-direction:column;align-items:flex-end;gap:14px;
    padding:18px 24px;background:rgba(6,12,16,0.97);
    border-bottom:0.5px solid #0d1e24;
  }
  .nav-links.open{display:flex}
  .hud{flex-direction:row;flex-wrap:wrap;justify-content:flex-end;left:20px;gap:5px}
  .hud-card{min-width:0;flex:0 1 auto;padding:5px 9px}
  .hud-val{font-size:13px}
  .hud-lbl{font-size:8px}
  .stage-tag{top:78px;left:14px}
  .bowl-area{right:8%}
  .plant-wrap{display:none}
  .table{display:none}
  .hero{padding:48px 20px 44px}
  .demo-sec,.email-sec{padding:44px 20px}
  .email-row{flex-direction:column}
  .email-btn{width:100%}
}