/* ============ PORTER v2 — Pally-style single-thread demo ============ */
:root{
  --bg:#FAFAF7;
  --surface:#FFFFFF;
  --ink:#0B0B0C;
  --ink-2:#3E3E3C;
  --mute:#9C9C94;
  --hair:#E8E7E1;
  --blue:#2F55FF;
  --imsg:#0A84FF;
  --lime:#B7F542;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --apple:-apple-system,"SF Pro Text","Helvetica Neue","Segoe UI",sans-serif;
  --r:14px;
  --shadow-soft:0 1px 2px rgba(11,11,12,.04),0 8px 24px rgba(11,11,12,.05);
  --shadow-float:0 2px 4px rgba(11,11,12,.05),0 24px 64px rgba(11,11,12,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:450;
  font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--lime);color:var(--ink)}

.eyebrow{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--mute)}
.sec-h{font-size:clamp(32px,4.6vw,56px);font-weight:600;letter-spacing:-.03em;line-height:1.06;margin-top:20px}
.sec-sub{color:var(--ink-2);max-width:560px;margin:22px auto 0;font-size:17px}
.mute{color:var(--mute)}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:8px;vertical-align:1px}
.dot-live{background:var(--lime);animation:pulse 2.4s infinite}
.dot-blue{background:var(--blue)}
.dot-ink{background:var(--ink)}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(183,245,66,.55)}70%{box-shadow:0 0 0 8px rgba(183,245,66,0)}100%{box-shadow:0 0 0 0 rgba(183,245,66,0)}}

.btn{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:550;
  text-decoration:none;cursor:pointer;border:0;border-radius:999px;padding:14px 26px;
  transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(11,11,12,.18)}
.btn-primary .arr{transition:transform .25s}
.btn-primary:hover .arr{transform:translateX(4px)}
.btn-small{background:var(--ink);color:#fff;font-size:13px;padding:9px 18px}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}.d4{transition-delay:.42s}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(250,250,247,.75);border-bottom:1px solid transparent;transition:border-color .3s}
.nav.scrolled{border-bottom-color:var(--hair)}
.nav-inner{max-width:1200px;margin:0 auto;padding:16px 32px;display:flex;align-items:center;justify-content:space-between}
.wordmark{font-weight:650;font-size:18px;letter-spacing:-.02em}
.nav-right{display:flex;align-items:center;gap:22px}
.nav-status{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2)}

/* hero */
.hero{padding:180px 24px 120px;text-align:center}
.hero-h{font-size:clamp(48px,8vw,104px);font-weight:650;letter-spacing:-.045em;line-height:.98;margin-top:26px}
.hero-sub{max-width:640px;margin:30px auto 0;font-size:19px;color:var(--ink-2)}
.hero-cta{margin-top:38px}
.micro{margin-top:18px;font-size:13px;color:var(--mute)}

/* hero inline email capture */
.hero-join{display:flex;gap:10px;max-width:460px;margin:38px auto 0}
.hj-input{flex:1;min-width:0;font-family:var(--sans);font-size:15px;color:var(--ink);
  background:var(--surface);border:1px solid var(--hair);border-radius:999px;
  padding:13px 20px;outline:none;transition:border-color .2s}
.hj-input:focus{border-color:var(--ink)}
.hj-btn{flex-shrink:0}
.hj-err{text-align:center;margin-top:10px}
.hj-step2{margin-top:38px}
.hj-q{margin-top:0;font-size:15px;font-weight:550}
.hj-opts{justify-content:center;margin-top:14px}
#hjDone{margin-top:38px}
@media (max-width:560px){
  .hero-join{flex-direction:column;max-width:340px}
  .hj-btn{justify-content:center}
}

/* philosophy */
.philo{padding:150px 24px 60px;text-align:center}
.philo-h{font-size:clamp(34px,5.4vw,68px);font-weight:600;letter-spacing:-.04em;line-height:1.08}
.philo-punch{margin-top:38px;font-size:clamp(22px,2.8vw,34px);font-weight:600;letter-spacing:-.02em}

/* converge headline */
.converge{padding:120px 24px 30px;text-align:center}

/* ============ the sticky phone stage ============ */
.stage-scroll{height:420vh;position:relative}
.stage-sticky{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;overflow:hidden}
/* iOS Safari: 100vh includes the collapsible URL bar; svh is the stable visible height */
@supports (height:100svh){
  .stage-sticky{height:100svh}
}
@media (max-width:700px){
  .stage-scroll{height:300vh}
}
.stage-glow{position:absolute;width:720px;height:720px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,85,255,.10),rgba(123,97,255,.05) 45%,transparent 70%);
  filter:blur(10px);animation:glowpulse 7s ease-in-out infinite}
@keyframes glowpulse{0%,100%{transform:scale(1);opacity:.8}50%{transform:scale(1.12);opacity:1}}

.device{position:relative;width:min(360px,92vw)}
.dv-btn{position:absolute;background:#2A2A2E;border-radius:2px;z-index:0}
.dv-silent{left:-2px;top:110px;width:3px;height:26px}
.dv-volup{left:-2px;top:160px;width:3px;height:44px}
.dv-voldn{left:-2px;top:214px;width:3px;height:44px}
.dv-power{right:-2px;top:180px;width:3px;height:70px}
.bezel{position:relative;z-index:1;background:#111114;border-radius:54px;padding:9px;
  box-shadow:0 2px 6px rgba(11,11,12,.12),0 40px 90px rgba(11,11,12,.22),inset 0 0 0 1.5px #3A3A40}
.screen{position:relative;background:#fff;border-radius:45px;overflow:hidden;
  height:min(700px,76vh);display:flex;flex-direction:column}
@supports (height:1svh){
  .screen{height:min(700px,72svh)}
}
.island{position:absolute;top:11px;left:50%;transform:translateX(-50%);
  width:104px;height:28px;background:#000;border-radius:999px;z-index:5}
.statusbar{display:flex;justify-content:space-between;align-items:center;
  padding:16px 26px 6px;font-family:var(--apple)}
.sb-time{font-size:13.5px;font-weight:600}
.sb-icons{display:flex;gap:6px;align-items:center}
.sb-signal{width:17px;height:11px}.sb-wifi{width:16px;height:12px}.sb-batt{width:25px;height:12px}
.thread-head{display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:6px 20px 10px;border-bottom:1px solid var(--hair);background:rgba(249,249,249,.94)}
.th-avatar{width:44px;height:44px;border-radius:50%;color:#fff;
  background:linear-gradient(180deg,#4E9BFF,#0A84FF);
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:600;
  font-family:var(--apple)}
.th-name{font-family:var(--apple);font-size:12px;font-weight:550}
.th-name i{font-style:normal;color:#B9BDC4}

/* the thread itself — bottom-anchored, items revealed by scroll */
.thread{flex:1;display:flex;flex-direction:column;justify-content:flex-end;
  gap:9px;padding:16px 14px 22px;overflow:hidden}
.titem{display:none}
.titem.on{display:block;animation:arrive .55s cubic-bezier(.2,.8,.2,1) both}
@keyframes arrive{from{opacity:0;transform:translateY(16px) scale(.96)}to{opacity:1;transform:none}}
.tmsg{max-width:82%;padding:9px 14px;border-radius:19px;font-size:14px;line-height:1.4;
  font-family:var(--apple)}
.tm-in{align-self:flex-start;background:#E9E9EB;color:#000;border-bottom-left-radius:5px;margin-right:auto}
.tm-out{align-self:flex-end;background:var(--imsg);color:#fff;border-bottom-right-radius:5px;margin-left:auto}
.titem.on.tmsg{display:block}
.tsep{align-self:center;text-align:center;font-family:var(--apple);font-size:10.5px;color:#8E8E93;padding:4px 0}
.tsep b{font-weight:600}
.tdel{font-size:10px;padding:0;margin-top:-4px;align-self:flex-end;text-align:right}
.stage-cap{margin-top:26px;font-family:var(--mono);font-size:11.5px;color:var(--mute);
  text-align:center;padding:0 24px;max-width:520px}

/* killer */
.killer{position:relative;background:var(--ink);color:#fff;padding:170px 24px;text-align:center;overflow:hidden}
.killer-field{position:absolute;inset:0;pointer-events:none}
.kchip{position:absolute;font-family:var(--mono);font-size:10px;white-space:nowrap;
  color:rgba(255,255,255,.38);border:1px solid rgba(255,255,255,.12);
  padding:5px 10px;border-radius:999px;background:rgba(255,255,255,.03);
  opacity:0}
.kchip.go{animation:converge var(--dur,3s) var(--del,0s) cubic-bezier(.4,.05,.2,1) forwards}
@keyframes converge{
  0%{opacity:0;transform:translate(0,0) scale(1)}
  12%{opacity:1}
  82%{opacity:.9}
  100%{opacity:0;transform:translate(var(--tx),var(--ty)) scale(.25)}
}
.killer-inner{position:relative;z-index:1}
.killer-h{font-size:clamp(44px,7vw,96px);font-weight:650;letter-spacing:-.04em;line-height:1.04}
.k-accent{color:var(--lime)}
.killer-sub{margin-top:26px;font-size:18px;color:rgba(255,255,255,.55)}
.killer-cards{margin-top:64px;display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.kc{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r);padding:18px 22px;font-size:14px;font-weight:500;text-align:left;
  display:flex;flex-direction:column;gap:8px;
  opacity:0;transform:translateY(20px) scale(.96);
  transition:opacity .7s,transform .7s cubic-bezier(.2,.8,.2,1)}
.killer.armed .kc{opacity:1;transform:none}
.killer.armed .kc:nth-child(1){transition-delay:1.4s}
.killer.armed .kc:nth-child(2){transition-delay:1.6s}
.killer.armed .kc:nth-child(3){transition-delay:1.8s}
.kc-tag{font-family:var(--mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:var(--lime)}

/* memory constellation */
.memory{padding:150px 24px 110px;text-align:center}
.const{position:relative;max-width:820px;height:520px;margin:80px auto 0}
.const-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.const-core{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:var(--surface);border:1px solid var(--hair);border-radius:18px;
  padding:22px 34px;box-shadow:var(--shadow-float);z-index:2;
  display:flex;flex-direction:column;gap:4px}
.cc-k{font-family:var(--mono);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--mute)}
.const-core strong{font-size:19px;font-weight:650;letter-spacing:-.02em;white-space:nowrap}
.const-node{
  position:absolute;left:var(--cx);top:var(--cy);transform:translate(-50%,-50%) scale(.85);
  font-family:var(--mono);font-size:11.5px;color:var(--ink-2);
  background:rgba(255,255,255,.7);border:1px solid var(--hair);border-radius:999px;
  padding:8px 15px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  opacity:0;transition:opacity .7s,transform .7s cubic-bezier(.2,.8,.2,1),border-color .4s,color .4s;
  white-space:nowrap;z-index:2}
.const.armed .const-node{opacity:1;transform:translate(-50%,-50%) scale(1);animation:orbit 9s ease-in-out infinite}
.const-node:hover{border-color:#7B61FF;color:#7B61FF}
@keyframes orbit{0%,100%{margin-top:0}50%{margin-top:-8px}}
.const.armed .const-node:nth-child(odd){animation-delay:-4.5s}
.const.armed .const-node:nth-child(3n){animation-delay:-2.5s}
.const-open{border-color:rgba(47,85,255,.45);color:var(--blue);background:rgba(47,85,255,.06);font-weight:500}
.const-open:hover{border-color:var(--blue);color:var(--blue)}
.cn-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--blue);
  margin-right:8px;vertical-align:1px;animation:pulse 2.4s infinite}
@media (max-width:700px){
  .const{height:auto;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;padding-top:120px}
  .const-node{position:static;transform:none;opacity:1}
  .const.armed .const-node{transform:none;animation:none}
  .const-core{top:40px;transform:translate(-50%,0)}
  .const-lines{display:none}
}

/* use cases */
.cases{padding:150px 24px;text-align:center;max-width:1080px;margin:0 auto}
.case-grid{margin-top:70px;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;text-align:left}
.case{background:var(--surface);border:1px solid var(--hair);border-radius:18px;padding:26px;
  box-shadow:var(--shadow-soft);display:flex;flex-direction:column;gap:14px;
  transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s,opacity .9s cubic-bezier(.2,.7,.2,1)}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-float)}
.case-emoji{font-size:26px}
.case h3{font-size:16px;font-weight:600;letter-spacing:-.01em}
.mini{display:flex;flex-direction:column;gap:7px}
.mini-in,.mini-out{max-width:92%;padding:8px 13px;border-radius:16px;font-size:13px;line-height:1.4;font-family:var(--apple)}
.mini-in{align-self:flex-start;background:#E9E9EB;color:#000;border-bottom-left-radius:4px}
.mini-out{align-self:flex-end;background:var(--imsg);color:#fff;border-bottom-right-radius:4px}
.case-srcs{display:flex;gap:4px 14px;flex-wrap:wrap;margin-top:auto}
.case-srcs span{font-size:12.5px;font-style:italic;color:var(--mute)}

/* trust */
.trust{padding:150px 24px;text-align:center;max-width:900px;margin:0 auto}
.trust-cols{margin-top:70px;display:grid;grid-template-columns:1fr 1fr;gap:24px;text-align:left}
@media (max-width:700px){.trust-cols{grid-template-columns:1fr}}
.tc{border:1px solid var(--hair);border-radius:var(--r);padding:32px;background:var(--surface);box-shadow:var(--shadow-soft)}
.tc-head{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:22px}
.tc-list{list-style:none}
.tc-list li{padding:11px 0;border-bottom:1px solid var(--hair);font-size:15px;font-weight:500}
.tc-list li:last-child{border-bottom:0}
.tc-auto li::before{content:"✓";color:var(--blue);margin-right:12px;font-weight:600}
.tc-you li::before{content:"→";color:var(--ink);margin-right:12px;font-weight:600}
.trust-note{margin-top:36px;font-family:var(--mono);font-size:12px;color:var(--mute)}
.trust-data{margin-top:10px}

/* cta / footer */
.cta{padding:170px 24px;text-align:center}
.cta-h{font-size:clamp(40px,6.4vw,84px);font-weight:650;letter-spacing:-.04em;line-height:1.02}
.beta-card{max-width:420px;margin:52px auto 0;background:var(--surface);border:1px solid var(--hair);
  border-radius:18px;padding:28px;box-shadow:var(--shadow-soft);text-align:left}
.bf-label{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--mute);margin:20px 0 8px}
.bf-label:first-child{margin-top:0}
.bf-input{width:100%;font-family:var(--sans);font-size:15px;color:var(--ink);
  background:var(--bg);border:1px solid var(--hair);border-radius:10px;padding:12px 14px;outline:none;
  transition:border-color .2s}
.bf-input:focus{border-color:var(--ink)}
.bf-opts{display:flex;gap:8px;flex-wrap:wrap}
.bf-opts button{font-family:var(--sans);font-size:14px;font-weight:500;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--hair);border-radius:999px;padding:8px 15px;
  cursor:pointer;transition:border-color .2s,background .2s,color .2s}
.bf-opts button:hover{border-color:var(--ink)}
.bf-opts button.sel{background:var(--ink);border-color:var(--ink);color:#fff}
.bf-err{font-size:12.5px;color:#C0392B;margin-top:12px}
.hp{position:absolute !important;left:-9999px !important;top:-9999px !important;
  opacity:0;height:0;width:0;pointer-events:none}
.bf-submit{width:100%;justify-content:center;margin-top:20px}
.bf-q{font-size:15px;font-weight:550;margin-bottom:14px}
.bf-ta{resize:vertical;min-height:76px}
.bf-skip{display:block;margin:12px auto 0;background:none;border:0;cursor:pointer;
  font-family:var(--sans);font-size:12.5px;color:var(--mute);text-decoration:underline}
.foot{max-width:1200px;margin:0 auto;padding:40px 32px 56px;display:flex;justify-content:space-between;
  align-items:center;border-top:1px solid var(--hair)}
.foot-note{font-family:var(--mono);font-size:11px;color:var(--mute)}
@media (max-width:600px){.foot{flex-direction:column;gap:12px}}