/* ============================================================
   Φ · Physical Hardware Intelligence
   Editorial print aesthetic — warm paper, ink, serif.
   ============================================================ */

:root{
  --paper:#ECE7DC;
  --paper-2:#E4DDCD;
  --ink:#1B1712;
  --ink-2:#544c40;
  --ink-3:#928975;
  --line:#D3C9B4;
  --line-2:#BEB39A;
  --apple:#B23A2E;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --disp:"Fraunces",Georgia,"Times New Roman",serif;
  --serif:"Newsreader",Georgia,serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:19px;line-height:1.62;font-weight:400;
  font-optical-sizing:auto;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
/* paper grain */
body::after{
  content:"";position:fixed;inset:0;z-index:2;pointer-events:none;
  mix-blend-mode:multiply;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.09'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--disp);font-weight:500;line-height:1.06;letter-spacing:-.01em;margin:0}
em{font-style:italic}
::selection{background:var(--ink);color:var(--paper)}
.grad{font-style:italic;font-weight:500}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,4vw,44px);
  transition:background .3s,border-color .3s,backdrop-filter .3s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(236,231,220,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.brand-sub{font-family:var(--disp);font-size:15px;font-weight:500;letter-spacing:.01em;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{position:relative;font-family:var(--serif);font-size:16px;color:var(--ink-2);transition:color .2s}
.nav-links a:not(.nav-cta)::after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:1px;background:var(--ink);transition:right .25s var(--ease)}
.nav-links a:not(.nav-cta):hover::after,.nav-links a.active::after{right:0}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-cta{border:1px solid var(--ink);border-radius:3px;padding:6px 16px;color:var(--ink)!important;transition:background .2s,color .2s}
.nav-cta:hover{background:var(--ink);color:var(--paper)!important}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:1.5px;background:var(--ink);transition:.3s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- layout ---------- */
main{position:relative;z-index:1}
.section{max-width:var(--maxw);margin:0 auto;padding:clamp(80px,12vw,150px) clamp(20px,5vw,44px) 0;scroll-margin-top:80px}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:clamp(34px,5vw,54px)}
.sec-idx{font-family:var(--mono);font-size:13px;color:var(--ink-3)}
.sec-label{font-family:var(--disp);font-size:15px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--ink);padding-bottom:5px;border-bottom:1px solid var(--ink)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--serif);font-size:17px;letter-spacing:.01em;
  padding:11px 24px;border-radius:3px;border:1px solid var(--ink);color:var(--ink);
  background:transparent;cursor:pointer;transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn-lg{padding:14px 30px;font-size:18px}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}

/* ---------- hero ---------- */
.hero{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,5vw,44px);
  min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.hero-copy{padding-top:clamp(24px,4vh,52px);max-width:820px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);margin-bottom:22px}
.hero-title{font-size:clamp(2.5rem,6vw,4.3rem);font-weight:500;line-height:1.03;letter-spacing:-.02em}
.hero-lede{font-size:clamp(1.05rem,1.8vw,1.3rem);color:var(--ink-2);max-width:34ch;margin:24px auto 0}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}
#armCanvas{display:block;width:100%;height:clamp(340px,45vh,480px);margin-top:14px;touch-action:pan-y}
.arm-readout{max-width:52ch;min-height:2.9em;margin:2px auto 0;font-size:1.02rem;color:var(--ink);line-height:1.45}
.arm-readout b{font-family:var(--disp);font-weight:600}
.arm-readout .ar-hint{font-style:italic;color:var(--ink-3)}
.scroll-hint{display:inline-flex;align-items:center;gap:8px;font-family:var(--serif);font-size:15px;font-style:italic;
  color:var(--ink-2);margin:18px 0 34px;border-bottom:1px solid var(--line-2);padding-bottom:2px}
.scroll-hint .arrow{font-style:normal}
.scroll-hint:hover{color:var(--ink);border-color:var(--ink)}

/* ---------- mission ---------- */
.mission-statement{font-size:clamp(1.7rem,3.6vw,2.9rem);font-weight:400;line-height:1.22;letter-spacing:-.01em;max-width:20ch}
.mission-statement em{font-style:italic}
.mission-statement .hl{border-bottom:1.5px solid var(--ink)}
.mission-quote{font-style:italic;font-size:clamp(1.15rem,1.9vw,1.4rem);color:var(--ink-2);
  margin:40px 0 0;padding-left:22px;border-left:2px solid var(--ink);max-width:40ch}

/* ---------- pillars ---------- */
.pillar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px)}
.card{padding:22px 0 0;border-top:1px solid var(--ink);transition:border-color .3s}
.card-num{font-family:var(--mono);font-size:12px;color:var(--ink-3);margin-bottom:16px}
.card h3{font-size:1.35rem;font-weight:500;margin-bottom:10px}
.card p{color:var(--ink-2);font-size:1rem;margin:0}

/* ---------- robot ---------- */
.robot-intro{max-width:760px;margin-bottom:clamp(34px,4vw,56px)}
.robot-intro h2{font-size:clamp(1.8rem,3.6vw,2.8rem);font-weight:500}
.robot-intro p{color:var(--ink-2);font-size:1.12rem;margin:18px 0 0}
.robot-intro b{font-weight:500;font-style:italic}
.robot-stage{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:center}
.arm-diagram{position:relative;border:1px solid var(--line);border-radius:4px;background:var(--paper-2);padding:26px;color:var(--ink)}
.arm-blueprint .link{stroke-width:8;stroke-linecap:round;stroke:var(--ink)}
.arm-blueprint rect,.arm-blueprint line:not(.link){stroke-width:1.5;stroke:var(--line-2)}
.joint{cursor:pointer}
.joint circle{fill:var(--paper);stroke:var(--ink);stroke-width:2;transition:.22s var(--ease)}
.joint text{fill:var(--ink);font-family:var(--mono);font-size:12px;text-anchor:middle;transition:.22s}
.joint:hover circle,.joint:focus circle,.joint.active circle{fill:var(--ink)}
.joint:hover text,.joint:focus text,.joint.active text{fill:var(--paper)}
.joint:focus{outline:none}
.arm-hint{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.robot-panel{display:flex;flex-direction:column;gap:26px}
.joint-readout{border-left:2px solid var(--ink);padding:4px 0 4px 22px;min-height:130px}
.jr-tag{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
#jrTitle{font-size:1.5rem;font-weight:500;margin:10px 0 8px}
#jrBody{color:var(--ink-2);margin:0;font-size:1.02rem}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(20px,3vw,40px)}
.spec{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line)}
.spec-k{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.spec-v{font-size:1rem;color:var(--ink)}
#diagramCanvas{width:100%;aspect-ratio:1 / 0.92;display:block;touch-action:manipulation}
.dof-list{list-style:none;margin:0;padding:0}
.dof-list li{border-top:1px solid var(--line)}
.dof-list li:first-child{border-top:0}
.dof-list button{width:100%;display:flex;gap:12px;align-items:baseline;text-align:left;background:none;border:0;
  cursor:pointer;font-family:var(--serif);font-size:1.02rem;color:var(--ink-2);padding:10px 2px;transition:color .2s,padding .2s var(--ease)}
.dof-list button b{font-family:var(--mono);font-size:12px;color:var(--ink-3);transition:color .2s}
.dof-list button:hover,.dof-list button.active{color:var(--ink);padding-left:9px}
.dof-list button.active b{color:var(--apple)}

/* ---------- loop ring ---------- */
.loop-h2{font-size:clamp(1.8rem,3.6vw,2.7rem);font-weight:500;text-align:center;margin-bottom:clamp(30px,4vw,48px)}
.loop-ring{position:relative;width:min(430px,86vw);aspect-ratio:1;margin:0 auto 46px}
.loop-ring svg{width:100%;height:100%;overflow:visible}
.ring-track{fill:none;stroke:var(--line-2);stroke-width:1.5}
.ring-progress{fill:none;stroke:var(--ink);stroke-width:2.5;stroke-linecap:round;
  stroke-dasharray:722.6;stroke-dashoffset:722.6;transition:stroke-dashoffset .7s var(--ease)}
.lnode{cursor:pointer}
.lnode>circle{fill:var(--paper);stroke:var(--line-2);stroke-width:1.5;transition:.3s var(--ease)}
.lnode>text{fill:var(--ink-2);font-family:var(--mono);font-size:15px;text-anchor:middle;dominant-baseline:central;transition:.3s}
.lnode .lbl{fill:var(--ink-3);font-family:var(--serif);font-size:13px;font-style:italic;dominant-baseline:middle}
.lnode .lbl.lbl-start{text-anchor:start}
.lnode .lbl.lbl-end{text-anchor:end}
.lnode:focus{outline:none}
.lnode:hover>circle,.lnode:focus>circle{stroke:var(--ink)}
.lnode.active>circle{fill:var(--ink);stroke:var(--ink)}
.lnode.active>text{fill:var(--paper)}
.lnode.active .lbl{fill:var(--ink);font-style:normal}
.ring-center{position:absolute;inset:23% 20%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px;pointer-events:none}
.rc-idx{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--ink-3)}
#rcTitle{font-size:clamp(1.3rem,2.4vw,1.7rem);font-weight:500}
#rcBody{color:var(--ink-2);font-size:.98rem;margin:0;max-width:22ch;line-height:1.5}

/* chips (zoo / events / pipeline) */
.zoo,.events{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.zoo-label,.events-label,.ladder-label,.founders-label{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.zoo-chips,.event-chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.zoo-chips span,.event-chips span{font-family:var(--serif);font-size:15px;padding:5px 15px;border:1px solid var(--line-2);border-radius:20px;color:var(--ink)}
.zoo-chips .muted{color:var(--ink-3);border-style:dashed}

/* ---------- stack / repo ---------- */
.stack-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:clamp(24px,4vw,52px);align-items:start}
.repo-card{padding:clamp(28px,3vw,40px);border:1px solid var(--line-2);border-radius:4px;background:var(--paper-2);display:flex;flex-direction:column}
.repo-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}
.repo-path{font-family:var(--mono);font-size:13.5px;color:var(--ink-2)}
.repo-path b{color:var(--ink)}
.repo-badge{font-family:var(--mono);font-size:11px;color:var(--ink-3);border:1px solid var(--line-2);border-radius:20px;padding:2px 11px}
.repo-card h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:500}
.repo-card>p{color:var(--ink-2);margin:14px 0 24px;font-size:1.05rem}
.pipeline{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:6px 0 28px}
.pipeline span{font-family:var(--mono);font-size:12px;color:var(--ink);border:1px solid var(--line-2);border-radius:4px;padding:7px 13px;background:var(--paper);transition:background .2s var(--ease),color .2s,border-color .2s}
.pipeline span:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.pipeline i{color:var(--ink-3);font-style:normal}
.repo-card .btn{align-self:flex-start;margin-top:auto}
.ladder{padding-top:4px}
.ladder ul{list-style:none;margin:16px 0 0;padding:0}
.ladder li{position:relative;padding:14px 0 14px 56px;border-top:1px solid var(--line);transition:padding-left .22s var(--ease)}
.ladder li:first-child{border-top:0}
.ladder li::before{content:attr(data-lvl);position:absolute;left:0;top:14px;font-family:var(--mono);font-size:12px;color:var(--ink-2);border:1px solid var(--line-2);border-radius:3px;padding:2px 7px;transition:background .22s,color .22s,border-color .22s}
.ladder li:hover{padding-left:62px}
.ladder li:hover::before{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ladder li:hover b{color:var(--ink)}
.ladder li b{display:block;font-family:var(--disp);font-size:1.1rem;font-weight:500}
.ladder li span{color:var(--ink-2);font-size:.95rem}

/* ---------- roadmap ---------- */
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--ink);margin-bottom:44px}
.tl-item{position:relative;padding:32px 28px 12px 0}
.tl-item:not(:last-child){border-right:1px solid var(--line)}
.tl-item{padding-left:28px}
.tl-item:first-child{padding-left:0}
.tl-dot{position:absolute;top:-6.5px;left:28px;width:11px;height:11px;border-radius:50%;background:var(--paper);border:1.5px solid var(--ink-3)}
.tl-item:first-child .tl-dot{left:0}
.tl-item.done .tl-dot{background:var(--ink);border-color:var(--ink)}
.tl-item.now .tl-dot{border-color:var(--ink);background:var(--paper)}
.tl-when{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink-3)}
.tl-item h4{font-size:1.25rem;font-weight:500;margin:12px 0 8px}
.tl-item p{color:var(--ink-2);font-size:1rem;margin:0}

/* ---------- join ---------- */
.join{max-width:var(--maxw);margin:0 auto;padding-top:clamp(48px,6vw,80px)}
.join-inner{margin-top:0;padding:clamp(36px,4.5vw,58px) clamp(24px,5vw,64px);
  border:1px solid var(--line-2);border-radius:6px;background:var(--paper-2);text-align:center}
.join-inner .sec-head{justify-content:center}
.join-title{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:500}
.join-lede{color:var(--ink-2);max-width:44ch;margin:18px auto 0;font-size:1.2rem}
.join-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:26px 0 34px}
.founders{border-top:1px solid var(--line);padding-top:26px}
.founders-label{display:block;margin-bottom:18px}
.founder-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.founder b{display:block;font-family:var(--disp);font-size:1.1rem;font-weight:500}
.founder span{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--ink-3)}
.advisor{color:var(--ink-2);margin:20px 0 0;font-size:1rem;font-style:italic}
.advisor b{font-style:normal;font-weight:500}

/* ---------- footer ---------- */
.footer{max-width:var(--maxw);margin:clamp(90px,12vw,160px) auto 0;
  padding:40px clamp(20px,5vw,44px) 54px;border-top:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;position:relative;z-index:1}
.footer-brand{display:flex;align-items:center;gap:14px}
.footer-brand b{display:block;font-family:var(--disp);font-size:1.05rem;font-weight:500}
.footer-brand span{font-size:14px;color:var(--ink-3)}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:15px;color:var(--ink-2);border-bottom:1px solid transparent;transition:border-color .2s}
.footer-links a:hover{border-color:var(--ink)}
.footer-fine{width:100%;font-family:var(--mono);font-size:11px;color:var(--ink-3);margin:6px 0 0}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============================================================ RESPONSIVE */
@media (max-width:900px){
  .nav-links{position:fixed;inset:0 0 auto 0;top:0;padding:90px 32px 34px;
    flex-direction:column;align-items:flex-start;gap:2px;
    background:var(--paper);border-bottom:1px solid var(--line);
    transform:translateY(-102%);transition:transform .4s var(--ease)}
  .nav-links.open{transform:none}
  .nav-links a{font-size:22px;font-family:var(--disp);padding:14px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-cta{border:1px solid var(--ink);width:100%;text-align:center;margin-top:12px;padding:12px}
  .nav-toggle{display:flex;z-index:60}
  .hero{justify-content:flex-start}
  .hero-copy{padding-top:clamp(96px,15vh,124px)}
  #armCanvas{height:46vh;min-height:320px}
  .robot-stage,.stack-grid{grid-template-columns:1fr}
  .pillar-grid{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr;border-top:0}
  .tl-item{border-right:0!important;border-left:1px solid var(--line);padding-left:26px}
  .tl-item:first-child{padding-left:26px}
  .tl-dot,.tl-item:first-child .tl-dot{left:-6.5px;top:36px}
  .founder-row{grid-template-columns:1fr 1fr}
}
@media (max-width:540px){
  body{font-size:18px}
  .pillar-grid,.founder-row{grid-template-columns:1fr}
  .btn{width:100%;justify-content:center}
  .hero-cta,.join-cta{width:100%}
  .footer{flex-direction:column;align-items:flex-start}
  .mission-statement{max-width:none}
}

/* ---------- intro · eyes opening ---------- */
html.intro-lock,html.intro-lock body{overflow:hidden}
.intro{
  position:fixed;inset:0;z-index:9999;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;
  background:var(--paper);
  animation:introOut .5s var(--ease) 1.8s forwards;
}
.intro-mark{width:min(50vmin,560px);height:auto}
.intro-eye{transform-box:fill-box;transform-origin:center;transform:scaleY(.06)}
.intro-eye-l{animation:introEye .45s cubic-bezier(.34,1.56,.64,1) .4s forwards}
.intro-eye-r{animation:introEye .45s cubic-bezier(.34,1.56,.64,1) .48s forwards}
@keyframes introEye{0%{transform:scaleY(.06)}55%{transform:scaleY(1.2)}100%{transform:scaleY(1)}}
@keyframes introOut{to{opacity:0;visibility:hidden;pointer-events:none}}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}