/* ============================================================
   NEUROBOTICS IP — VERSION 6  "Warm Pulse"
   V2's bold deep-tech structure, dressed in V3's warm-paper palette.
   Self-contained.
   ============================================================ */
:root {
  --bg: #f3efe6;
  --bg-2: #ebe5d8;
  --surface: #faf7f0;
  --surface-2: #f0e9da;
  --fg: #1c1a16;
  --fg-2: #4d473d;
  --muted: #918a7b;
  --border: #d9d2c3;
  --accent: #8a2f2a;        /* oxblood */
  --accent-2: #2f4a78;      /* navy (warm secondary, from V3) */
  --accent-fg: #faf7f0;     /* paper, for text on oxblood */
  --glow: 0 14px 34px -14px rgba(138,47,42,.45);
  --font-display: "Sora", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --max: 1240px;
  --ease: cubic-bezier(.22,.61,.36,1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* ambient warm wash */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 78% 8%, rgba(138,47,42,.07), transparent 60%),
    radial-gradient(50% 40% at 12% 92%, rgba(47,74,120,.06), transparent 60%);
}
.wrap { position: relative; z-index: 1; }
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 32px; }
section { padding: 130px 0; position: relative; }

a { color: inherit; text-decoration: none; }
h1,h2,h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.04; letter-spacing: -.025em; }
h1 { font-size: clamp(44px, 6.6vw, 92px); text-wrap: pretty; }
h2 { font-size: clamp(30px, 4vw, 54px); text-wrap: balance; }
p { text-wrap: pretty; }
.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ""; width: 26px; height: 1.5px; background: var(--accent); }
.lead { font-size: clamp(17px, 1.7vw, 21px); color: var(--fg-2); line-height: 1.55; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-body); font-size: 15px; font-weight: 600; padding: 15px 26px; border-radius: 10px; border: 1.5px solid transparent; cursor: pointer; transition: transform .25s var(--ease), box-shadow .25s, background .25s, color .25s, border-color .25s; }
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow); }
.btn-ghost { border-color: var(--border); color: var(--fg); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* nav */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; display: flex; align-items: center; justify-content: space-between; padding: 18px 32px; background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: blur(16px) saturate(150%); border-bottom: 1px solid transparent; transition: border-color .4s; }
.nav.scrolled { border-bottom-color: var(--border); }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 600; font-size: 18px; letter-spacing: -.01em; line-height: 1.05; }
.brand .mark { width: 31px; height: 31px; flex: none; }
.brand .mark svg { width: 100%; height: 100%; display: block; }
.brand small { font-family: var(--font-mono); font-size: 10px; color: var(--muted); letter-spacing: .12em; display: block; line-height: 1; margin-top: 2px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { font-size: 14.5px; color: var(--fg-2); font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--accent); }
@media (max-width: 880px){ .nav-links { display: none; } }

/* hero */
.hero { padding-top: 150px; padding-bottom: 80px; min-height: 96vh; display: flex; flex-direction: column; justify-content: center; }
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 56px; align-items: center; max-width: 900px; }
.hero h1 { margin: 24px 0 26px; }
.hero .lead { max-width: 52ch; }
.hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.hero-visual { display: none; }
.hero-visual .glowcard { position: relative; aspect-ratio: 1/1; border: 1px solid var(--border); border-radius: 20px; background: radial-gradient(120% 120% at 50% 0%, rgba(138,47,42,.05), transparent 55%), var(--surface); display: grid; place-items: center; padding: 7%; overflow: hidden; box-shadow: 0 40px 110px -55px rgba(138,47,42,.45); }
.hero-visual .corner { position: absolute; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; top: 18px; color: var(--muted); }
.hero-visual .corner.l { left: 20px; }
.hero-visual .corner.r { right: 20px; color: var(--accent); display: flex; align-items: center; gap: 7px; }
.hero-visual .corner.r .live { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: nb-pulse 2.6s var(--ease) infinite; }
.hero-visual .corner.bl, .hero-visual .corner.br { top: auto; bottom: 18px; display: flex; align-items: center; gap: 7px; }
.hero-visual .corner.bl { left: 20px; color: var(--accent); }
.hero-visual .corner.br { right: 20px; color: var(--accent-2); }
.hero-visual .corner .lg-clk { width: 11px; height: 11px; border-radius: 50%; border: 1.4px solid var(--accent); flex: none; }
.hero-visual .corner .lg-tag { width: 14px; height: 9px; border-radius: 2.5px; background: var(--accent-2); flex: none; }
@media (max-width: 940px){ .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero-visual .glowcard { max-width: 460px; } }

/* stat row with dividers */
.stat-row { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 76px; border-top: 1px solid var(--border); }
.stat-row .stat { padding: 28px 26px 4px 0; position: relative; }
.stat-row .stat:not(:last-child)::after { content: ""; position: absolute; right: 26px; top: 28px; bottom: 8px; width: 1px; background: linear-gradient(var(--border), transparent); }
.stat-row .num { font-family: var(--font-display); font-weight: 600; font-size: clamp(32px, 3.6vw, 46px); letter-spacing: -.02em; line-height: 1; }
.stat-row .num .u { color: var(--accent); }
.stat-row .lbl { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-top: 12px; }
@media (max-width: 720px){ .stat-row { grid-template-columns: repeat(2,1fr); row-gap: 18px; } }

/* big statement */
.statement { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-2); }
.statement .big { font-family: var(--font-display); font-weight: 600; font-size: clamp(26px, 3.4vw, 46px); line-height: 1.18; letter-spacing: -.02em; max-width: 20ch; }
.statement .big em { color: var(--accent); font-style: normal; }
.statement .sub { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 48px; }
.statement .sub p { color: var(--fg-2); }
@media (max-width: 820px){ .statement .sub { grid-template-columns: 1fr; gap: 22px; } }

/* section head */
.sec-head { max-width: 760px; margin-bottom: 56px; }
.sec-head h2 { margin: 18px 0 16px; }

/* F1/F2 panels */
.panels { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.panel { position: relative; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); padding: 48px 44px; overflow: hidden; transition: border-color .35s, box-shadow .35s, transform .35s var(--ease); }
.panel:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); box-shadow: 0 30px 70px -45px rgba(138,47,42,.5); transform: translateY(-4px); }
.panel .ghost { position: absolute; top: -28px; right: -6px; font-family: var(--font-display); font-weight: 700; font-size: 200px; line-height: 1; color: var(--fg); opacity: .045; letter-spacing: -.04em; pointer-events: none; }
.panel .pill { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; padding: 7px 13px; border: 1px solid var(--accent); border-radius: 999px; color: var(--accent); display: inline-flex; align-items: center; gap: 8px; }
.panel .pill .d { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: nb-pulse 2.6s var(--ease) infinite; }
.panel h3 { font-size: clamp(21px, 2.2vw, 28px); margin: 22px 0 8px; }
.panel .subtitle { font-style: italic; color: var(--fg-2); font-size: 15.5px; margin-bottom: 20px; }
.panel .desc { color: var(--fg-2); font-size: 15px; }
.panel .protected { list-style: none; margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 12px; }
.panel .protected li { font-size: 14px; padding-left: 22px; position: relative; }
.panel .protected li::before { content: ""; position: absolute; left: 0; top: 7px; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); }
.panel .protected li b { color: var(--fg); font-weight: 600; }
.panel .protected li span { color: var(--fg-2); }
.panel .filing { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.panel .filing .f { font-family: var(--font-mono); font-size: 11.5px; padding: 7px 11px; border: 1px solid var(--border); border-radius: 7px; color: var(--fg-2); }
.panel .filing .f b { color: var(--accent-2); }
@media (max-width: 820px){ .panels { grid-template-columns: 1fr; } }

/* applications marquee */
.apps-section { border-top: 1px solid var(--border); background: var(--bg-2); padding: 84px 0; overflow: hidden; }
.apps-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 40px; flex-wrap: wrap; }
.apps-head h2 { font-size: clamp(24px, 2.6vw, 34px); }
.marquee { display: flex; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.marquee .track { display: flex; gap: 16px; padding-right: 16px; animation: scrollx 28s linear infinite; flex: none; }
.marquee .item { display: flex; align-items: center; gap: 14px; white-space: nowrap; font-family: var(--font-display); font-weight: 500; font-size: clamp(22px, 2.6vw, 34px); color: var(--fg); padding: 14px 30px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
.marquee .item .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent-2); flex: none; }
@keyframes scrollx { to { transform: translateX(-50%); } }

/* CTA */
.cta { text-align: center; }
.cta-band { border: 1px solid var(--border); border-radius: 22px; padding: 88px 48px; background: radial-gradient(120% 140% at 50% 0%, rgba(138,47,42,.07), transparent 55%), var(--surface); position: relative; overflow: hidden; }
.cta-band h2 { margin-bottom: 16px; }
.cta-band .lead { max-width: 52ch; margin: 0 auto 32px; }
.cta-band .hero-cta { justify-content: center; }
.cta-note { margin: 34px auto 0; max-width: 540px; font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-2); display: flex; gap: 14px; align-items: flex-start; text-align: left; border: 1px dashed color-mix(in srgb, var(--accent) 40%, var(--border)); border-radius: 12px; padding: 18px 22px; line-height: 1.6; }
.cta-note .d { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); margin-top: 5px; flex: none; animation: nb-pulse 2.6s var(--ease) infinite; }

/* inquiry form */
.inquiry { max-width: 720px; margin: 36px auto 0; text-align: left; }
.inquiry .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.f-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.field.full { grid-column: 1 / -1; }
.field .lbl { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.field .lbl i { color: var(--accent); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; max-width: 100%; font-family: var(--font-body); font-size: 15px; color: var(--fg);
  background: var(--bg); border: 1.5px solid var(--border); border-radius: 10px;
  padding: 13px 15px; transition: border-color .2s, box-shadow .2s; -webkit-appearance: none; appearance: none;
}
.field textarea { resize: vertical; min-height: 120px; line-height: 1.5; }
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%238a2f2a' stroke-width='1.6' d='M1 1.5L6 6.5L11 1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 15px center; padding-right: 38px; cursor: pointer;
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: .75; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.field input:user-invalid, .field textarea:user-invalid { border-color: color-mix(in srgb, var(--accent) 70%, #c0392b); }
.f-foot { display: flex; align-items: center; gap: 18px; margin-top: 22px; flex-wrap: wrap; }
.inquiry .submit { cursor: pointer; }
.inquiry .submit[disabled] { opacity: .6; cursor: progress; }
.f-status { font-family: var(--font-mono); font-size: 13px; line-height: 1.45; }
.f-status.ok { color: var(--accent-2); }
.f-status.err { color: #b23b2e; }
.inquiry.sent .f-grid, .inquiry.sent .f-foot { display: none; }
.form-done { display: none; text-align: center; padding: 18px 0 4px; }
.inquiry.sent + .form-done { display: block; }
.form-done .chk { width: 54px; height: 54px; border-radius: 50%; border: 2px solid var(--accent); display: grid; place-items: center; margin: 0 auto 18px; color: var(--accent); }
.form-done h3 { font-family: var(--font-display); font-size: 24px; margin-bottom: 8px; }
.form-done p { color: var(--fg-2); font-size: 15px; max-width: 44ch; margin: 0 auto; }
@media (max-width: 640px){
  .f-grid { grid-template-columns: 1fr; gap: 16px; }
  .cta-band { padding: 48px 22px; }
  .inquiry { margin-top: 28px; }
  .field input, .field select, .field textarea { font-size: 16px; padding: 12px 14px; }
  .field select { background-position: right 13px center; padding-right: 36px; }
  .f-foot { gap: 12px; margin-top: 18px; }
  .inquiry .submit { width: 100%; justify-content: center; }
  .f-status { width: 100%; }
}

/* footer */
footer { border-top: 1px solid var(--border); padding: 54px 0 40px; }
.foot-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.foot-brand { max-width: 320px; }
.foot-brand p { color: var(--fg-2); font-size: 14px; margin-top: 16px; }
.foot-cols { display: flex; gap: 60px; flex-wrap: wrap; }
.foot-col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; font-weight: 500; }
.foot-col a { display: block; font-size: 14.5px; color: var(--fg-2); margin-bottom: 10px; transition: color .2s; }
.foot-col a:hover { color: var(--accent); }
.foot-bottom { display: flex; justify-content: space-between; margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: 12px; color: var(--muted); flex-wrap: wrap; gap: 12px; }

/* timing-fabric schematic — warm/paper */
.timing-fabric { width: 100%; }
.timing-fabric svg { width: 100%; height: 100%; display: block; overflow: visible; }
.tf-spoke { stroke: var(--border); stroke-width: 1.4; }
.tf-chip { color: var(--fg-2); animation: tfChipColor 3.4s var(--ease) infinite; }
.tf-chip .tf-node { fill: var(--surface-2); stroke: var(--border); stroke-width: 1.5; animation: tfChipStroke 3.4s var(--ease) infinite; }
.tf-chip .tf-ico { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tf-chip .tf-ico .fill { fill: currentColor; stroke: none; }
@keyframes tfChipColor { 0%, 30%, 66%, 100% { color: var(--fg-2); } 40%, 46% { color: var(--accent); } }
.tf-hub-ring { fill: var(--surface); stroke: var(--accent); stroke-width: 2; animation: tfHubReg 3.4s var(--ease) infinite; }
.tf-hub-label { fill: var(--accent); font-family: var(--font-mono); font-weight: 600; font-size: 14px; }
.tf-hub-ico { fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.tf-broadcast { fill: none; stroke: var(--accent); stroke-width: 1.4; transform-box: fill-box; transform-origin: center; animation: tfWave 3.4s var(--ease) infinite; }
.tf-broadcast.w2 { animation-delay: .3s; }

/* outbound: clock event riding hub -> sensor */
.tf-out { opacity: 0; }
.tf-out .cface { fill: var(--surface); stroke: var(--accent); stroke-width: 1.4; }
.tf-out .chand { fill: none; stroke: var(--accent); stroke-width: 1.4; stroke-linecap: round; }
.tf-out.o1 { animation: tfo1 3.4s var(--ease) infinite; }
.tf-out.o2 { animation: tfo2 3.4s var(--ease) infinite; }
.tf-out.o3 { animation: tfo3 3.4s var(--ease) infinite; }
.tf-out.o4 { animation: tfo4 3.4s var(--ease) infinite; }
.tf-out.o5 { animation: tfo5 3.4s var(--ease) infinite; }
.tf-out.o6 { animation: tfo6 3.4s var(--ease) infinite; }

/* return: capture + timestamp tag riding sensor -> hub */
.tf-ret { opacity: 0; }
.tf-ret .ttag { fill: var(--accent-2); stroke: none; }
.tf-ret .thole { fill: var(--surface); }
.tf-ret .tline { fill: none; stroke: var(--surface); stroke-width: 1.3; stroke-linecap: round; opacity: .9; }
.tf-ret.r1 { animation: tfr1 3.4s var(--ease) infinite; }
.tf-ret.r2 { animation: tfr2 3.4s var(--ease) infinite; }
.tf-ret.r3 { animation: tfr3 3.4s var(--ease) infinite; }
.tf-ret.r4 { animation: tfr4 3.4s var(--ease) infinite; }
.tf-ret.r5 { animation: tfr5 3.4s var(--ease) infinite; }
.tf-ret.r6 { animation: tfr6 3.4s var(--ease) infinite; }

/* outbound clock travels out 4%->36%, absorbed by 44% */
@keyframes tfo1 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(0,-150px);opacity:1} 44%,100%{transform:translate(0,-150px);opacity:0} }
@keyframes tfo2 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(130px,-75px);opacity:1} 44%,100%{transform:translate(130px,-75px);opacity:0} }
@keyframes tfo3 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(130px,75px);opacity:1} 44%,100%{transform:translate(130px,75px);opacity:0} }
@keyframes tfo4 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(0,150px);opacity:1} 44%,100%{transform:translate(0,150px);opacity:0} }
@keyframes tfo5 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(-130px,75px);opacity:1} 44%,100%{transform:translate(-130px,75px);opacity:0} }
@keyframes tfo6 { 0%{transform:translate(0,0);opacity:0} 5%{opacity:1} 36%{transform:translate(-130px,-75px);opacity:1} 44%,100%{transform:translate(-130px,-75px);opacity:0} }

/* return tag emitted at 48% (after capture flash), arrives hub by 80% */
@keyframes tfr1 { 0%,44%{transform:translate(0,-150px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }
@keyframes tfr2 { 0%,44%{transform:translate(130px,-75px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }
@keyframes tfr3 { 0%,44%{transform:translate(130px,75px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }
@keyframes tfr4 { 0%,44%{transform:translate(0,150px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }
@keyframes tfr5 { 0%,44%{transform:translate(-130px,75px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }
@keyframes tfr6 { 0%,44%{transform:translate(-130px,-75px);opacity:0} 50%{opacity:1} 80%{transform:translate(0,0);opacity:1} 87%,100%{transform:translate(0,0);opacity:0} }

@keyframes tfWave { 0%{transform:scale(.42);opacity:.5} 32%{opacity:0} 100%{transform:scale(2.4);opacity:0} }
@keyframes tfChipStroke { 0%,30%,66%,100%{stroke:var(--border);stroke-width:1.5} 40%,46%{stroke:var(--accent);stroke-width:2.6} }
@keyframes tfHubReg { 0%,72%,100%{stroke-width:2} 82%{stroke-width:3.6} }
@keyframes nb-pulse { 0%,100%{opacity:1} 50%{opacity:.3} }

/* reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* version switcher (shared neutral chrome) */
.ver-nav { position: fixed; z-index: 100; left: 50%; bottom: 24px; transform: translateX(-50%); display: flex; align-items: center; gap: 4px; padding: 7px 8px; background: rgba(28,26,22,.9); backdrop-filter: blur(20px) saturate(160%); border: 1px solid rgba(255,255,255,.12); border-radius: 999px; box-shadow: 0 16px 50px -12px rgba(0,0,0,.45); font-family: "IBM Plex Sans", sans-serif; }
.ver-nav .vl { font-family: "IBM Plex Mono", monospace; font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,250,243,.5); padding: 0 8px; white-space: nowrap; }
.ver-nav a, .ver-nav span.v { display: inline-flex; align-items: center; justify-content: center; min-width: 34px; height: 34px; padding: 0 10px; border-radius: 999px; font-family: "IBM Plex Mono", monospace; font-size: 13px; font-weight: 500; color: rgba(255,250,243,.65); transition: background .25s, color .25s; }
.ver-nav a:hover { background: rgba(255,255,255,.1); color: #fff; }
.ver-nav a.active { background: var(--accent); color: var(--accent-fg); }
.ver-nav span.v.disabled { color: rgba(255,250,243,.25); cursor: not-allowed; }

/* about-page helpers */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.q-block { border-left: 2px solid var(--accent); padding-left: 30px; }
.q-block p { font-family: var(--font-display); font-size: clamp(20px, 2.1vw, 29px); line-height: 1.4; color: var(--fg); font-weight: 500; }
.q-block cite { display: block; margin-top: 20px; font-family: var(--font-mono); font-size: 13px; color: var(--muted); font-style: normal; letter-spacing: .04em; }
@media (max-width: 820px){ .about-split { grid-template-columns: 1fr; gap: 32px; } }
@media (prefers-reduced-motion: reduce){ .tf-out,.tf-ret,.tf-broadcast,.tf-chip,.tf-chip .tf-node,.tf-hub-ring,.marquee .track,.hero-visual .corner.r .live,.panel .pill .d,.cta-note .d { animation: none; } .tf-out,.tf-ret { opacity: 0; } }

/* ===== mobile menu (hamburger drawer) ===== */
.nav-toggle { display: none; }
.mobile-nav { display: none; }
.mobile-nav-backdrop { display: none; }
@media (max-width: 880px){
  body.mnav-ready .nav > *:not(.brand):not(.nav-toggle),
  body.mnav-ready .masthead > *:not(.brand):not(.nav-toggle) { display: none !important; }
  .nav-toggle {
    display: inline-flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px;
    width: 46px; height: 46px; padding: 0 11px; border: 1px solid var(--border); border-radius: 11px;
    background: transparent; cursor: pointer; -webkit-tap-highlight-color: transparent;
  }
  .nav-toggle span { height: 2px; width: 100%; background: var(--fg); border-radius: 2px; transition: transform .25s var(--ease), opacity .2s; }
  .nav-toggle.open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2){ opacity: 0; }
  .nav-toggle.open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }
  .mobile-nav {
    display: flex; flex-direction: column; gap: 2px;
    position: fixed; top: 0; right: 0; bottom: 0; width: min(84vw, 350px);
    background: var(--surface); z-index: 90; transform: translateX(102%);
    transition: transform .32s var(--ease); padding: 86px 26px 30px;
    box-shadow: -28px 0 80px -40px rgba(0,0,0,.35); overflow-y: auto;
    border-left: 1px solid var(--border);
  }
  .mobile-nav.open { transform: none; }
  .mobile-nav-close {
    position: absolute; top: 20px; right: 22px; width: 40px; height: 40px;
    border: none; background: transparent; color: var(--fg); font-size: 30px; line-height: 1;
    cursor: pointer; -webkit-tap-highlight-color: transparent;
  }
  .mobile-nav a { font-size: 18px; font-weight: 500; color: var(--fg); padding: 16px 2px; border-bottom: 1px solid var(--border); }
  .mobile-nav a.m-cta { margin-top: 20px; padding: 16px; border: none; border-radius: 10px; background: var(--accent); color: var(--accent-fg); text-align: center; font-weight: 600; }
  .mobile-nav-backdrop {
    display: block; position: fixed; inset: 0; background: rgba(28,26,22,.4); z-index: 80;
    opacity: 0; pointer-events: none; transition: opacity .32s; backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
  }
  .mobile-nav-backdrop.open { opacity: 1; pointer-events: auto; }
}