:root{
  --bg:#0a0e14; --bg2:#0f151e; --panel:#141c27; --line:#243041;
  --text:#e8edf3; --muted:#a3b0c0; --accent:#ff5a1f; --accent2:#ffb020; --teal:#2fd4c0;
  --est:#2fd4c0; --pilot:#ffb020; --hyp:#b49cff;
  --radius:16px; --maxw:1180px;
  --font:"Inter","Segoe UI",Roboto,"Helvetica Neue",Arial,system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 var(--font);-webkit-font-smoothing:antialiased}
img,video,svg,iframe{display:block;max-width:100%}
a{color:var(--accent2)}
a:hover{color:#ffd27a}
:focus-visible{outline:3px solid var(--accent2);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#000;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:12px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,5.4vw,4.3rem);font-weight:800}
h2{font-size:clamp(1.8rem,3.4vw,2.7rem);font-weight:800;max-width:22ch}
h3{font-size:1.2rem;font-weight:700}
p{margin:0 0 1em}
.accent{background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{font:600 .8rem/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent2);margin-bottom:1rem}
.lede{font-size:1.2rem;color:#cfd8e3;max-width:38ch}
.lede-sm{color:var(--muted);max-width:60ch}
.fine{font-size:.85rem;color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:.4em;background:linear-gradient(135deg,var(--accent),#ff7a2f);color:#0a0e14;font-weight:700;text-decoration:none;padding:.85em 1.4em;border-radius:999px;border:0;cursor:pointer;font-size:1rem;transition:transform .15s,box-shadow .15s;box-shadow:0 8px 24px -10px rgba(255,90,31,.7)}
.btn:hover{color:#0a0e14;transform:translateY(-1px);box-shadow:0 12px 28px -10px rgba(255,90,31,.9)}
.btn-ghost{background:transparent;color:var(--text);border:1.5px solid #3a4a5e;box-shadow:none}
.btn-ghost:hover{color:var(--text);border-color:var(--accent2)}
.btn-sm{padding:.55em 1.1em;font-size:.9rem}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,14,20,.82);backdrop-filter:blur(10px);border-bottom:1px solid rgba(36,48,65,.7)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:.55em;color:var(--text);text-decoration:none;font-weight:800;font-size:1.2rem;letter-spacing:-.01em}
.brand-mark{width:30px;height:30px;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:1.6rem}
.nav-links a:not(.btn){color:var(--muted);text-decoration:none;font-weight:500;font-size:.95rem}
.nav-links a:not(.btn):hover{color:var(--text)}
.nav-toggle{display:none;background:none;border:1.5px solid #3a4a5e;color:var(--text);border-radius:999px;padding:.4em 1em;font:inherit;font-size:.9rem}

/* hero */
.hero{position:relative;overflow:hidden;padding:72px 0 88px;background:
  radial-gradient(900px 500px at 85% 20%,rgba(255,90,31,.18),transparent 60%),
  radial-gradient(700px 500px at 0% 100%,rgba(47,212,192,.10),transparent 60%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:center}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 36px}
.hero-stats{list-style:none;padding:0;margin:0 0 10px;display:flex;gap:36px;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats .num{font:700 1.9rem/1.1 var(--mono);color:var(--text)}
.hero-stats .lbl{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.hero-media{position:relative;margin:0;justify-self:center;width:100%;max-width:340px}
.hero-video{width:100%;aspect-ratio:9/16;object-fit:cover;border-radius:24px;border:1px solid var(--line);box-shadow:0 40px 80px -30px rgba(0,0,0,.8),0 0 0 8px rgba(255,255,255,.02)}
.hero-media figcaption{font-size:.82rem;color:var(--muted);margin-top:12px;text-align:center}
.orbit{position:absolute;inset:-36px;border-radius:50%;border:1.5px dashed rgba(255,176,32,.25);z-index:-1;animation:spin 40s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* sections */
.section{padding:96px 0}
.section-alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.story-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:64px;align-items:center}
.story-media{margin:0}
.story-media video{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}
.story-media figcaption{font-size:.82rem;color:var(--muted);margin-top:10px}
.timeline{list-style:none;padding:0;margin:24px 0;border-left:2px solid var(--line)}
.timeline li{display:grid;grid-template-columns:72px 1fr;gap:16px;padding:0 0 18px 20px;position:relative}
.timeline li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,90,31,.2)}
.t-year{font:700 1rem var(--mono);color:var(--accent2)}
.callout{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--pilot);padding:16px 18px;border-radius:12px;color:#d5dde7}

/* badges */
.badge{display:inline-block;font:700 .72rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:.45em .7em;border-radius:6px;white-space:nowrap;vertical-align:middle;margin-right:.4em}
.badge-est{background:rgba(47,212,192,.14);color:var(--est);border:1px solid rgba(47,212,192,.45)}
.badge-pilot{background:rgba(255,176,32,.14);color:var(--pilot);border:1px solid rgba(255,176,32,.45)}
.badge-hyp{background:rgba(180,156,255,.14);color:var(--hyp);border:1px solid rgba(180,156,255,.45)}
.badge-calc{background:rgba(255,90,31,.12);color:#ff8a5c;border:1px solid rgba(255,90,31,.45)}

/* physics */
.physics-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;margin-top:12px}
.formula{font:600 1.5rem/1 var(--mono);background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:8px 0 20px;color:var(--text);display:inline-block}
.formula span{color:var(--accent2)}
.formula sub{font-size:.55em;color:var(--muted)}
.diagram{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.diagram svg{width:100%;height:auto}
.diagram text{font-family:var(--font)}
.diagram figcaption{color:var(--muted);font-size:.85rem;text-align:center;margin-top:6px}

.calc{margin:64px 0 48px;background:linear-gradient(180deg,#151e2a,#111823);border:1px solid var(--line);border-radius:20px;padding:32px}
.calc-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.calc-head h3{margin:0;font-size:1.45rem}
.calc-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}
.calc label{display:flex;justify-content:space-between;font-weight:600;margin:6px 0 8px;color:#d5dde7}
.calc output{font-family:var(--mono);color:var(--accent2)}
input[type=range]{width:100%;accent-color:var(--accent);height:28px;margin:0 0 14px}
.readouts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:8px 0 0}
.readouts div{background:#0d131b;border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.readouts dt{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.readouts dd{margin:2px 0 0;font:700 1.4rem var(--mono);color:var(--text)}
.readouts small{font-size:.7em;color:var(--muted)}
.calc-chart svg{width:100%;height:auto}
.calc .fine{margin:20px 0 0;max-width:110ch}

.cards{display:grid;gap:20px}
.cards-3{grid-template-columns:repeat(3,1fr)}
.cards-4{grid-template-columns:repeat(4,1fr);margin-top:28px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card p{color:#c3cdd9;margin:0}
.config-note{color:var(--muted);max-width:80ch;margin:20px 0 64px}
.aud{display:flex;flex-direction:column}
.aud svg{width:34px;height:34px;color:var(--accent);margin-bottom:14px}
.aud p{flex:1;margin-bottom:16px}
.aud a{font-weight:700;text-decoration:none}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.ticks{list-style:none;padding:0;margin:0 0 28px}
.ticks li{position:relative;padding-left:26px;margin-bottom:10px;color:#c9d3de}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:12px;height:12px;border-radius:3px;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.render{margin:0}
.render img{border-radius:var(--radius);border:1px solid var(--line);width:100%;height:auto}
.render figcaption{font-size:.82rem;color:var(--muted);margin-top:10px}

/* evidence */
.legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;color:var(--muted);font-size:.9rem;margin:20px 0 30px}
.evidence{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:18px}
.evidence li{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.evidence li:last-child:nth-child(odd){grid-column:1/-1}
.evidence li .badge{margin-bottom:12px}
.evidence h3{font-size:1.1rem}
.evidence h3 small{display:block;font-weight:500;font-size:.8rem;color:var(--muted);margin-top:4px;letter-spacing:0}
.evidence p{color:#c3cdd9;margin-bottom:.6em}
.cite{font-size:.82rem;color:var(--muted)!important}

/* specs */
.specs{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:28px 0 12px}
.specs div{background:var(--panel);padding:24px}
.specs dt{font:600 .75rem var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.specs dd{margin:8px 0 0;font-size:1.25rem;font-weight:700}

/* videos */
.vo2{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:28px;margin:28px 0 56px}
.vo2 h3{font-size:1.6rem;margin-top:10px}
.vo2-frame{aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#000;border:1px solid var(--line)}
.vo2-frame iframe{width:100%;height:100%;border:0}
.sub{margin:0 0 18px;color:var(--text)}
.vgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:48px}
.vcard{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.vcard video{width:100%;aspect-ratio:9/16;object-fit:cover;background:#000;max-height:560px}
.vcard figcaption{padding:14px 16px 18px;color:#c3cdd9;font-size:.93rem}
.vcard figcaption strong{display:block;color:var(--text);margin-bottom:2px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
address{font-style:normal;line-height:1.9;margin-top:20px;font-size:1.05rem}
.form{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:28px;display:flex;flex-direction:column}
.form label{font-weight:600;margin:14px 0 6px;font-size:.95rem}
.form label:first-child{margin-top:0}
.opt{color:var(--muted);font-weight:400}
.form input,.form select,.form textarea{background:#0d131b;color:var(--text);border:1px solid #33435a;border-radius:10px;padding:12px 14px;font:inherit;font-size:1rem}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--accent2);outline:none;box-shadow:0 0 0 3px rgba(255,176,32,.25)}
.form .btn{margin-top:20px;align-self:flex-start}
.form .fine{margin:12px 0 0}

.footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:.9rem}
.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer a{color:var(--muted)}

/* responsive */
@media (max-width:980px){
  .hero-grid,.story-grid,.physics-grid,.calc-grid,.split,.contact-grid,.vo2{grid-template-columns:1fr}
  .hero-media{max-width:300px}
  .story-media{max-width:420px}
  .cards-4{grid-template-columns:1fr 1fr}
  .specs{grid-template-columns:repeat(2,1fr)}
  .evidence{grid-template-columns:1fr}
}
@media (max-width:760px){
  body{font-size:16px}
  .section{padding:68px 0}
  .hero{padding:44px 0 64px}
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:0;background:#0d131b;border-bottom:1px solid var(--line);padding:8px 24px 20px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;width:100%}
  .nav-links .btn{width:auto;margin-top:8px;padding:.6em 1.2em}
  .cards-3,.cards-4,.vgrid{grid-template-columns:1fr}
  .vcard video{max-height:520px}
  .hero-stats{gap:24px}
  .readouts{grid-template-columns:1fr 1fr}
  .calc{padding:22px}
  .timeline li{grid-template-columns:56px 1fr}
  .formula{font-size:1.15rem}
  .hero-media{max-width:250px}
  .orbit{display:none}
  .hero-stats{display:grid;grid-template-columns:repeat(3,auto);gap:14px;justify-content:start}
  .hero-stats .num{font-size:1.35rem}
  .hero-stats .lbl{font-size:.7rem}
  .story-media video{aspect-ratio:1/1}
  .vcard video{aspect-ratio:4/5;max-height:none}
  .readouts dd{font-size:1.2rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .orbit{animation:none}
  *{transition:none!important}
}

/* =========================================================
   v6 additions: rules for the current page markup
   ========================================================= */
html,body{overflow-x:hidden}
body{overflow-x:clip}
.mono{font-family:var(--mono);letter-spacing:.02em}
.tnum{font-variant-numeric:tabular-nums}
.metal{background:linear-gradient(180deg,#ffffff 0%,#d9e1ea 45%,#8b98a8 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.display{font-size:clamp(2rem,4.2vw,3.3rem);max-width:24ch}
.h3-lg{font-size:clamp(1.3rem,2vw,1.6rem)}
.section-tight{padding:72px 0}
.tick{display:inline-block;width:22px;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));vertical-align:middle;margin-right:.7em;border-radius:2px;position:relative;top:-2px}

/* hero: full-bleed looping background */
.hero{min-height:min(92vh,860px);display:flex;flex-direction:column;justify-content:center;padding:120px 0 64px;isolation:isolate;background:#05070a}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;max-width:none;object-fit:cover;object-position:50% 35%;z-index:-3;pointer-events:none}
.hero-shade{position:absolute;inset:0;z-index:-2;pointer-events:none;background:
  linear-gradient(90deg,rgba(5,7,10,.94) 0%,rgba(5,7,10,.82) 38%,rgba(5,7,10,.45) 70%,rgba(5,7,10,.3) 100%),
  linear-gradient(180deg,rgba(5,7,10,.55) 0%,rgba(5,7,10,0) 30%,rgba(5,7,10,0) 65%,var(--bg) 100%),
  radial-gradient(800px 500px at 85% 15%,rgba(255,90,31,.20),transparent 60%)}
.blueprint{position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(47,212,192,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,212,192,.07) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse at 30% 50%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse at 30% 50%,#000 20%,transparent 75%)}
.hero-inner{position:relative;z-index:1;width:100%}
.hero h1{max-width:16ch;text-shadow:0 2px 30px rgba(0,0,0,.35)}
.hero h1 .metal,.hero h1 .accent{display:block}
.hero .lede{color:#dde4ec;max-width:44ch}
.hero-note{color:var(--muted);max-width:52ch;border-left:2px solid var(--accent);padding-left:14px;font-size:.98rem}
.readout{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;margin:0;max-width:860px;background:rgba(36,48,65,.8);border:1px solid rgba(36,48,65,.9);border-radius:14px;overflow:hidden;backdrop-filter:blur(8px)}
.readout div{background:rgba(10,14,20,.78);padding:14px 16px}
.readout dt{font:600 .7rem/1.2 var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}
.readout dd{margin:6px 0 0;font:700 1.05rem/1.25 var(--mono);color:var(--text)}
.readout small{font-size:.72em;color:var(--accent2)}
.hero-cap{position:relative;z-index:1;margin:36px auto 0;font:500 .75rem/1.4 var(--mono);color:#7d8a99;letter-spacing:.04em;width:100%}

/* origin */
.origin-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:64px;align-items:start;margin:40px 0 36px}
.origin-text p{color:#c9d3de}
.dropcap::first-letter{float:left;font:800 4.2rem/.82 var(--font);margin:.08em .12em 0 0;color:var(--accent);background:linear-gradient(180deg,var(--accent2),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.pull{margin:28px 0;padding:6px 0 6px 24px;border-left:3px solid var(--accent)}
.pull p{font-size:clamp(1.3rem,2.2vw,1.65rem);line-height:1.35;font-weight:700;color:var(--text);margin:0;letter-spacing:-.01em}
.origin-side{position:sticky;top:96px}
.origin-media{margin:0 0 28px}
.origin-media video{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);background:#000;box-shadow:0 30px 60px -30px rgba(0,0,0,.8)}
.origin-media figcaption{font-size:.82rem;color:var(--muted);margin-top:10px}
.origin-side .timeline{margin:0}
.origin-side .timeline li{grid-template-columns:84px 1fr;font-size:.93rem;color:#c9d3de}
.origin-side .t-year{font-size:.85rem}
.timeline li:last-child{padding-bottom:0}

/* physics compare */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:40px 0 64px}
.cmp{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:24px;position:relative;overflow:hidden}
.cmp::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:#5d6873}
.cmp-spin{background:linear-gradient(180deg,#18202c,#121a24);border-color:rgba(255,90,31,.35)}
.cmp-spin::before{background:linear-gradient(90deg,var(--accent),var(--accent2),var(--teal))}
.cmp-fig{width:100%;height:auto;background:#0b1118;border:1px solid var(--line);border-radius:12px;margin-bottom:20px}
.cmp-fig .lbl{font:600 12px var(--mono);letter-spacing:.02em}
.grid-lines path{stroke:rgba(47,212,192,.10);stroke-width:1;fill:none}
.cmp h3{font-size:1.35rem;display:flex;align-items:baseline;gap:.4em}
.cmp h3 .mono{font-size:.85rem;color:var(--muted);font-weight:600}
.cmp-spin h3 .mono{color:var(--accent2)}
.cmp-list{margin:0;display:grid;gap:0}
.cmp-list div{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:14px;padding:10px 0;border-top:1px solid var(--line)}
.cmp-list dt{font:600 .72rem/1.4 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding-top:.2em}
.cmp-list dd{margin:0;color:#d5dde7;font-size:.95rem;line-height:1.45}
.cmp-spin .cmp-list dd{color:var(--text)}
.rotor{transform-box:fill-box;transform-origin:center;animation:wobble 2.4s ease-in-out infinite}
@keyframes wobble{0%,100%{transform:scaleX(1)}50%{transform:scaleX(.55)}}
.physics-grid{align-items:start}
.physics-grid p{color:#c9d3de}
.physics-grid>div{background:rgba(20,28,39,.5);border:1px solid var(--line);border-radius:var(--radius);padding:28px}

/* tuning */
.tune{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:36px}
.tune-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;transition:border-color .2s,transform .2s}
.tune-card:hover{border-color:#3a4a5e;transform:translateY(-2px)}
.tune-card .tnum{font-size:.78rem;color:var(--accent2);letter-spacing:.14em;margin-bottom:10px}
.tune-card h3{font-size:1.25rem}
.tune-card p:last-child{color:#c3cdd9;margin:0}
.scale{display:flex;align-items:center;justify-content:space-between;height:60px;margin:8px 0 4px;padding:0 6px;position:relative}
.scale::before{content:"";position:absolute;left:6px;right:6px;top:50%;height:2px;background:linear-gradient(90deg,#3a4a5e,var(--accent));border-radius:2px}
.dot{position:relative;border-radius:50%;background:#0b1118;border:2px solid var(--text);box-shadow:0 0 0 4px var(--panel)}
.d1{width:18px;height:18px;border-color:#9aa6b2}
.d2{width:32px;height:32px;border-color:var(--accent2)}
.d3{width:48px;height:48px;border-color:var(--accent);box-shadow:0 0 0 4px var(--panel),0 0 24px rgba(255,90,31,.35)}
.scale-lbl{display:flex;justify-content:space-between;font:600 .75rem var(--mono);color:var(--muted);margin-bottom:16px}
.tune-fig{width:100%;height:60px;margin:8px 0 22px}
.config-note{margin:28px 0 8px}

/* ecosystem */
.eco{margin-top:36px}
.eco-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.eco-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;border-top:3px solid var(--teal)}
.eco-item .badge{margin-bottom:14px}
.eco-item p{color:#c3cdd9;margin:0}

/* audiences / cards */
.aud{border-top:3px solid var(--accent)}
.aud h3{font-size:1.12rem}

/* videos */
.vo2-copy p{color:#c3cdd9}
.vo2-copy .btn{margin-top:4px}
.sub{font-size:1.3rem}
.vcard{transition:border-color .2s}
.vcard:hover{border-color:#3a4a5e}

/* contact */
.contact-grid>div>p{color:#c9d3de}
.form select{appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px;background-repeat:no-repeat;padding-right:40px}
.form input,.form select,.form textarea{width:100%;min-width:0}
.form textarea{resize:vertical}

.footer{background:#07090c}
.footer a{text-decoration:none}
.footer a:hover{color:var(--text)}

/* responsive additions */
@media (max-width:980px){
  .origin-grid{grid-template-columns:1fr;gap:40px}
  .origin-side{position:static;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
  .origin-media{margin:0}
  .compare{grid-template-columns:1fr}
  .tune,.eco-list{grid-template-columns:1fr 1fr}
  .tune-card:last-child:nth-child(odd),.eco-item:last-child:nth-child(odd){grid-column:1/-1}
  .readout{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-shade{background:
    linear-gradient(180deg,rgba(5,7,10,.7) 0%,rgba(5,7,10,.78) 50%,rgba(5,7,10,.9) 80%,var(--bg) 100%),
    radial-gradient(600px 400px at 85% 10%,rgba(255,90,31,.18),transparent 60%)}
}
@media (max-width:760px){
  .wrap{padding:0 20px}
  .hero{min-height:0;padding:72px 0 40px}
  .hero h1{font-size:clamp(2.1rem,9vw,2.8rem)}
  .hero .lede{font-size:1.08rem}
  .cta-row{margin:22px 0 28px}
  .cta-row .btn{flex:1 1 auto;justify-content:center}
  .readout dd{font-size:.95rem}
  .readout div{padding:12px 14px}
  .origin-side{grid-template-columns:1fr}
  .origin-media{max-width:420px}
  .origin-media video{aspect-ratio:4/5}
  .dropcap::first-letter{font-size:3.4rem}
  .tune,.eco-list{grid-template-columns:1fr}
  .cmp,.tune-card,.eco-item{padding:20px}
  .physics-grid{gap:20px}
  .physics-grid>div{padding:22px}
  .compare{margin:28px 0 40px}
  .cmp-list div{grid-template-columns:1fr;gap:2px}
  .vo2{padding:20px;gap:22px}
  .form{padding:20px}
  .formula{font-size:1.05rem;padding:16px;max-width:100%;overflow-x:auto}
  .timeline li,.origin-side .timeline li{grid-template-columns:70px 1fr;gap:12px}
  .legend{gap:8px 12px}
  h2{max-width:none}
}
@media (max-width:420px){
  .readout{grid-template-columns:1fr 1fr}
  .readout dt{font-size:.62rem;letter-spacing:.08em}
  .readout dd{font-size:.88rem}
  .nav-links .btn{font-size:.85rem}
}
@media (prefers-reduced-motion:reduce){
  .rotor{animation:none}
  .tune-card:hover,.btn:hover{transform:none}
}
/* polish */
.eyebrow{line-height:1.5}
.physics-grid{align-items:stretch}
@media (max-width:760px){.timeline li,.origin-side .timeline li{grid-template-columns:84px 1fr}}