/* ============================================================
   Molecular Acoustics — Technology Exploration Site
   Prepared by IMMERSV. Light theme, MA magenta accent.
   Common Mode = deep blue · Differential Mode = magenta
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --bg:#FBFBFD;
  --bg-alt:#F3F4F7;
  --bg-ink:#0E1116;
  --ink:#15181D;
  --ink-soft:#525a64;
  --ink-faint:#8b929b;
  --line:#E5E7EC;
  --line-strong:#d3d7de;

  /* Common Mode — IMMERSV deep blue */
  --cm:#0F4761;
  --cm-2:#1A5275;
  --cm-tint:#E9F0F4;

  /* Differential Mode — MA magenta */
  --dm:#D6008C;
  --dm-2:#A3006B;
  --dm-tint:#FBE6F3;

  --white:#ffffff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(16,22,30,.04), 0 12px 34px rgba(16,22,30,.07);
  --shadow-lg:0 24px 60px rgba(16,22,30,.14);
  --maxw:1350px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,.display{font-family:'Poppins',sans-serif;font-weight:600;letter-spacing:-.02em;line-height:1.08;color:var(--ink)}
a{color:var(--dm-2);text-decoration:none}
a:hover{text-decoration:underline}
img{
    max-width: 100%;
    height: auto;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(251,251,253,.82);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 26px;
    height: 102px;
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 28px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;font-family:'Poppins';font-weight:600;font-size:16px;letter-spacing:-.01em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:26px;height:26px;flex:0 0 26px}
.brand .sub{color:var(--ink-faint);font-weight:400;font-size:12.5px;letter-spacing:.02em}
.nav-links{
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    flex: 0 0 auto;
    flex-wrap: nowrap;
}
.nav-links a{
  color:var(--ink-soft);font-size:14px;font-weight:500;padding:8px 12px;border-radius:9px;
  white-space:nowrap;
  transition:background .2s,color .2s;
}
.nav-links a:hover{background:var(--bg-alt);color:var(--ink);text-decoration:none}
.nav-links a.active{color:var(--dm-2);background:var(--dm-tint)}
.nav-cta{background:var(--ink);color:#fff !important}
.nav-cta:hover{background:#000 !important}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line-strong);border-radius:9px;width:40px;height:36px;font-size:18px;cursor:pointer}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.9}
.hero-grad{position:absolute;inset:0;background:
  radial-gradient(120% 90% at 80% 10%, rgba(214,0,140,.10), transparent 55%),
  radial-gradient(90% 80% at 8% 90%, rgba(15,71,97,.10), transparent 55%);
  pointer-events:none}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:96px 28px 88px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:'Poppins';font-weight:500;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dm-2);margin-bottom:22px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--dm);border-radius:2px}
.hero h1{font-size:clamp(2.5rem,5.4vw,4.3rem);font-weight:600;max-width:16ch}
.hero .lede{font-size:clamp(1.05rem,1.7vw,1.32rem);color:var(--ink-soft);max-width:56ch;margin:26px 0 0}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:38px}
.btn{
  display:inline-flex;align-items:center;gap:9px;font-family:'Poppins';font-weight:500;font-size:15px;
  padding:13px 22px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:transform .16s var(--ease),box-shadow .2s,background .2s;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--dm);color:#fff;box-shadow:0 10px 24px rgba(214,0,140,.28)}
.btn-primary:hover{background:var(--dm-2)}
.btn-ghost{background:var(--white);color:var(--ink);border-color:var(--line-strong);box-shadow:var(--shadow)}
.btn-ghost:hover{border-color:var(--ink-faint)}
.btn-arrow{transition:transform .18s var(--ease)}
.btn:hover .btn-arrow{transform:translateX(3px)}

/* mode chips under hero */
.mode-strip{display:flex;gap:18px;flex-wrap:wrap;margin-top:52px}
.mode-chip{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-soft);font-weight:500}
.dot{width:11px;height:11px;border-radius:50%}
.dot.cm{background:var(--cm)}
.dot.dm{background:var(--dm)}

/* ---------- Sections ---------- */
section{
	/* [disabled]padding-top: 84px; */
	padding-right: 0;
	padding-left: 0;
	/* [disabled]padding-bottom: 84px; */
}
.sec-alt{background:var(--bg-alt)}
.sec-ink{background:var(--bg-ink);color:#e9edf2}
.sec-ink h2,.sec-ink h3{color:#fff}
.sec-head{max-width:64ch;margin-bottom:46px}
.kicker{font-family:'Poppins';font-weight:600;font-size:12.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--dm-2);margin:0 0 14px}
.sec-ink .kicker{color:#ff5cbf}
h2.sec-title{font-size:clamp(1.8rem,3.3vw,2.7rem);margin:0}
.sec-head p{font-size:1.12rem;color:var(--ink-soft);margin:18px 0 0}
.sec-ink .sec-head p{color:#aeb7c2}

/* ---------- Principle two-field ---------- */
.fields{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.field{border-radius:var(--radius);padding:34px 32px;border:1px solid var(--line);background:var(--white);box-shadow:var(--shadow)}
.field.cm{border-top:4px solid var(--cm)}
.field.dm{border-top:4px solid var(--dm)}
.field .tag{font-family:'Poppins';font-weight:600;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.field.cm .tag{color:var(--cm)}
.field.dm .tag{color:var(--dm)}
.field h3{font-size:1.5rem;margin:10px 0 12px}
.field p{margin:0;color:var(--ink-soft)}

/* ---------- Chain ---------- */
.chain{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:stretch;gap:0;margin-top:8px}
.chain-node{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);position:relative;transition:transform .2s var(--ease),box-shadow .2s}
.chain-node:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.chain-node .num{font-family:'Poppins';font-weight:700;font-size:13px;color:var(--dm);letter-spacing:.08em}
.chain-node h3{font-size:1.4rem;margin:8px 0 10px}
.chain-node p{margin:0;color:var(--ink-soft);font-size:.97rem}
.chain-node .go{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-family:'Poppins';font-weight:500;font-size:14px;color:var(--dm-2)}
.chain-arrow{display:flex;align-items:center;justify-content:center;color:var(--line-strong);font-size:26px;padding:0 6px}

/* ---------- Card grid ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;box-shadow:var(--shadow);transition:transform .2s var(--ease),box-shadow .22s,border-color .2s;
  color:var(--ink);
}
a.card:hover{text-decoration:none;transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--dm)}
.card .idx{font-family:'Poppins';font-weight:600;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint)}
.card h3{font-size:1.42rem;margin:12px 0 10px}
.card p{margin:0 0 18px;color:var(--ink-soft);font-size:.98rem}
.card .go{margin-top:auto;display:inline-flex;align-items:center;gap:7px;font-family:'Poppins';font-weight:500;font-size:14px;color:var(--dm-2)}
.card .icn{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--dm-tint);color:var(--dm-2);margin-bottom:4px}
.card.market .icn{background:var(--cm-tint);color:var(--cm)}

/* ---------- Vertical page hero ---------- */
.vhero{position:relative;overflow:hidden;background:var(--bg-ink);color:#eef2f6;border-bottom:1px solid #20262f}
.vhero canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.7}
.vhero .hero-grad{background:radial-gradient(90% 80% at 82% 20%, rgba(214,0,140,.22), transparent 60%),radial-gradient(80% 80% at 6% 100%, rgba(26,82,117,.32), transparent 60%)}
.vhero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:74px 28px 66px}
.vhero .eyebrow{color:#ff5cbf}
.vhero .eyebrow::before{background:var(--dm)}
.vhero h1{color:#fff;font-size:clamp(2.2rem,4.6vw,3.6rem)}
.vhero .lede{
	color: #495666;
	font-size: clamp(1.02rem,1.6vw,1.25rem);
	max-width: 60ch;
	margin-top: 22px
}
.crumbs{
	font-size: 13px;
	color: #495666;
	margin-bottom: 24px
}
.crumbs a{color:#b9c2cd}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.badge{font-family:'Poppins';font-weight:500;font-size:12px;letter-spacing:.02em;padding:6px 13px;border-radius:999px;border:1px solid rgba(255,255,255,.16);color:#d7dee6;background:rgba(255,255,255,.05)}
.badge.granted{color:#7ff0c0;border-color:rgba(127,240,192,.3)}
.badge.dm{color:#ff8fd0;border-color:rgba(255,143,208,.32)}

/* ---------- Content blocks ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}
.prose h3{font-size:1.5rem;margin:0 0 14px}
.prose h4{font-family:'Poppins';font-weight:600;font-size:1.05rem;margin:28px 0 10px;color:var(--ink)}
.prose p{color:var(--ink-soft);margin:0 0 16px}
.steps{list-style:none;padding:0;margin:0;counter-reset:s}
.steps li{position:relative;padding:0 0 22px 52px;counter-increment:s}
.steps li::before{content:counter(s);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:10px;background:var(--dm-tint);color:var(--dm-2);font-family:'Poppins';font-weight:600;display:flex;align-items:center;justify-content:center;font-size:15px}
.steps li:not(:last-child)::after{content:"";position:absolute;left:16px;top:34px;bottom:6px;width:2px;background:var(--line)}
.steps b{color:var(--ink)}
.steps p{margin:4px 0 0;color:var(--ink-soft);font-size:.97rem}

.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 30px}
.panel + .panel{margin-top:22px}
.panel h4{font-family:'Poppins';font-weight:600;font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;color:var(--dm-2);margin:0 0 16px}
.list{list-style:none;padding:0;margin:0}
.list li{position:relative;padding:9px 0 9px 26px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.list li::before{content:"";position:absolute;left:2px;top:17px;width:9px;height:9px;border-radius:50%;background:var(--dm);opacity:.85}
.list.cm li::before{background:var(--cm)}
.list li b{color:var(--ink);font-weight:600}

/* stat row */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px 24px;box-shadow:var(--shadow)}
.stat .n{font-family:'Poppins';font-weight:600;font-size:2rem;color:var(--dm-2);line-height:1}
.stat .l{color:var(--ink-soft);font-size:.9rem;margin-top:8px}

/* diagram card */
.figure{background:linear-gradient(180deg,#fff, #fbfbfe);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.figure .cap{font-size:.82rem;color:var(--ink-faint);margin-top:14px;text-align:center}
.figure svg{display:block;width:100%;height:auto}
.figure picture,.figure img{
    display: block;
    width: 100%;
    height: auto;
    border-radius: 30px
}

/* patent strip */
.patent-strip{border-top:1px solid var(--line);background:var(--bg-alt)}
.patent-strip .wrap{padding-top:34px;padding-bottom:34px}
.patent-strip h4{font-family:'Poppins';font-weight:600;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 14px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{font-size:12.5px;font-family:'Inter';font-weight:500;padding:6px 12px;border-radius:8px;background:var(--white);border:1px solid var(--line-strong);color:var(--ink-soft)}
.chip .s{font-weight:600}
.chip.granted .s{color:var(--cm-2)}
.chip.pending .s{color:var(--dm-2)}

/* cross links */
.crosslinks{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:8px}
.xlink{display:flex;justify-content:space-between;align-items:center;gap:14px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 24px;box-shadow:var(--shadow);color:var(--ink);transition:transform .18s var(--ease),border-color .2s}
.xlink:hover{text-decoration:none;transform:translateY(-3px);border-color:var(--dm)}
.xlink .t{font-family:'Poppins';font-weight:500}
.xlink .d{font-size:.86rem;color:var(--ink-faint)}
.xlink .ar{color:var(--dm-2);font-size:20px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,#0F4761,#122c3b 60%,#3a0a29);color:#fff;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(1.7rem,3vw,2.4rem)}
.cta-band p{color:#c8d2db;max-width:52ch;margin:16px auto 30px}
.cta-band .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.24)}

/* ---------- Footer ---------- */
.foot{background:var(--bg-ink);color:#9aa4af;padding:54px 0 40px;border-top:1px solid #1c222b}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot .brand{color:#fff}
.foot .brand .sub{color:#7d8792}
.foot-links{display:flex;gap:40px;flex-wrap:wrap}
.foot-col h5{font-family:'Poppins';font-weight:600;color:#e6ebf0;font-size:13px;letter-spacing:.04em;margin:0 0 12px}
.foot-col a{display:block;color:#9aa4af;font-size:13.5px;padding:4px 0}
.foot-col a:hover{color:#fff;text-decoration:none}
.foot-note{margin-top:36px;padding-top:22px;border-top:1px solid #1c222b;font-size:12px;color:#6f7883;line-height:1.7}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .split{grid-template-columns:1fr;gap:34px}
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .chain{grid-template-columns:1fr}
  .chain-arrow{transform:rotate(90deg);padding:8px 0}
  .fields{grid-template-columns:1fr}
  .crosslinks{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 20px 18px;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px}
  .nav-toggle{display:block}
  .grid-3,.grid-4,.grid-2,.stats{grid-template-columns:1fr}
  .hero-inner{padding:64px 24px 58px}
  section{padding:60px 0}
}