/* Public homepage only. Retains BillyBot's dark / cyan and mono / sans identity. */
:root {
  --bg:#020617;
  --surface:#0b1222;
  --ink:#e2e8f0;
  --muted:#a2afc2;
  --accent:#22d3ee;
  --line:#253147;
  --mono:'JetBrains Mono','Cascadia Code',monospace;
  --body:'Inter',Arial,sans-serif;
}
* {
  box-sizing:border-box;
}
html {
  scroll-behavior:smooth;
  scroll-padding-top:100px;
}
body {
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a {
  color:inherit;
  text-decoration:none;
}
a:hover {
  color:var(--accent);
}
a:focus-visible,summary:focus-visible {
  outline:2px solid var(--accent);
  outline-offset:5px;
}
img {
  display:block;
  max-width:100%;
  height:auto;
}
figure,p,h1,h2,h3,dl,dd {
  margin:0;
}
p {
  color:var(--muted);
}
.container {
  width:min(1280px,calc(100% - 96px));
  margin-inline:auto;
}
.section {
  padding-block:86px;
}
h1,h2,h3 {
  line-height:1.16;
  text-wrap:balance;
}
h2 {
  font-size:clamp(30px,3.1vw,44px);
  font-weight:500;
  letter-spacing:-1.8px;
}
h3 {
  font-size:19px;
  font-weight:500;
}
.eyebrow {
  color:var(--accent);
  font:11px/1.6 var(--mono);
  letter-spacing:1.6px;
  text-transform:uppercase;
  margin-bottom:24px;
}
.intro {
  font-size:17px;
  line-height:1.8;
  margin-top:25px;
}
.skip-link {
  position:absolute;
  left:24px;
  top:-100px;
  z-index:10;
  padding:12px;
  background:var(--accent);
  color:var(--bg);
}
.skip-link:focus {
  top:12px;
}
.site-header {
  border-bottom:1px solid var(--line);
  background:var(--bg);
}
.nav {
  min-height:84px;
  display:flex;
  align-items:center;
  gap:36px;
}
.brand {
  display:flex;
  align-items:center;
  font:600 23px var(--mono);
  letter-spacing:-1.4px;
  color:var(--ink);
}
.brand img {
  margin-right:11px;
}
.brand span {
  color:var(--accent);
}
.brand .brand-slash {
  margin-left:12px;
  color:#607188;
  font-weight:400;
}
.nav-links {
  display:flex;
  gap:28px;
  margin-left:auto;
}
.nav a:not(.brand) {
  font:12px/1.5 var(--mono);
  min-height:44px;
  display:flex;
  align-items:center;
}
.operator-link {
  border-left:1px solid var(--line);
  padding-left:30px;
  gap:10px;
  color:var(--muted);
}
.hero {
  position:relative;
  isolation:isolate;
  min-height:650px;
  display:flex;
  align-items:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-art {
  position:absolute;
  inset:0;
  z-index:-2;
}
.hero-art img {
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.hero:after {
  content:'';
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(90deg,rgba(2,6,23,.65),rgba(2,6,23,.12) 47%,transparent 70%);
}
.hero-content {
  padding-block:60px;
}
.hero h1 {
  font:500 clamp(64px,7vw,98px)/1.12 var(--mono);
  letter-spacing:-7px;
  margin:0 0 24px;
}
.hero h1 span {
  color:var(--accent);
}
.hero-statement {
  color:var(--ink);
  font-size:clamp(23px,2.4vw,33px);
  line-height:1.3;
  max-width:500px;
  letter-spacing:-.8px;
}
.hero-description {
  max-width:435px;
  margin-top:22px;
  font-size:16px;
}
.actions {
  display:flex;
  gap:12px;
  margin-top:30px;
}
.button {
  min-height:48px;
  padding:12px 20px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:18px;
  border:1px solid #496078;
  font:12px var(--mono);
  background:rgba(2,6,23,.6);
}
.button.primary {
  background:var(--accent);
  color:var(--bg);
  border-color:var(--accent);
  font-weight:600;
}
.button:hover {
  background:var(--ink);
  border-color:var(--ink);
  color:var(--bg);
}
.development-note {
  font:11px/1.8 var(--mono);
  margin-top:25px;
}
.development-note span {
  color:var(--accent);
  font-size:18px;
  vertical-align:middle;
  margin-right:8px;
}
.hero-caption {
  position:absolute;
  bottom:22px;
  right:38px;
  font:10px var(--mono);
  color:#aeb9c9;
}
.hardware {
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:60px;
  align-items:center;
}
.spec-list {
  margin:28px 0;
}
.spec-list>div {
  padding:16px 0;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:115px 1fr;
  gap:12px;
}
.spec-list dt {
  font:12px/1.8 var(--mono);
  color:var(--ink);
}
.spec-list dd {
  font-size:14px;
  color:var(--muted);
}
.text-link {
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font:12px/1.5 var(--mono);
  gap:16px;
  color:var(--accent);
}
.product-figure {
  position:relative;
}
.product-figure img {
  width:100%;
}
figcaption {
  font:10px/1.7 var(--mono);
  color:var(--muted);
  margin-top:12px;
}
.product-figure figcaption {
  text-align:center;
}
.readiness,.safety {
  background:var(--surface);
  border-block:1px solid var(--line);
}
.section-heading {
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:end;
  gap:80px;
  margin-bottom:32px;
}
.section-heading>p {
  max-width:480px;
  font-size:15px;
}
.commissioning {
  padding:22px 26px;
  border:1px solid #756244;
  background:#1b1c21;
  display:grid;
  grid-template-columns:240px 1fr;
  gap:20px;
}
.commissioning strong {
  color:#edcea0;
  font:12px/1.7 var(--mono);
}
.commissioning p {
  font-size:14px;
  color:#d0c6b7;
}
.status-key {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:26px;
  padding:30px 0;
}
.status-key dt {
  font:12px/1.7 var(--mono);
  margin-bottom:8px;
}
.status-key dd {
  font-size:12px;
  color:var(--muted);
}
.capability-group {
  border-top:1px solid var(--line);
}
.capability-group:last-child {
  border-bottom:1px solid var(--line);
}
summary {
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:28px;
  list-style:none;
  min-height:74px;
  font-size:18px;
}
summary::-webkit-details-marker {
  display:none;
}
.group-number {
  color:var(--accent);
  font:11px var(--mono);
}
.expand {
  margin-left:auto;
  font:24px var(--mono);
  color:var(--muted);
}
details[open] .expand {
  transform:rotate(45deg);
}
.group-content {
  padding:0 0 26px 44px;
}
.group-content>p {
  font-size:14px;
  margin-bottom:20px;
}
.capability-row {
  display:grid;
  grid-template-columns:1fr 1.4fr;
  gap:30px;
  padding:16px 0;
  border-top:1px solid var(--line);
  font-size:14px;
}
.capability-row dd {
  color:var(--muted);
}
.status {
  display:block;
  width:fit-content;
  font:10px/1.6 var(--mono);
  color:var(--muted);
  margin-top:6px;
}
.status-gated {
  color:#edcea0;
}
.status-core {
  color:var(--accent);
}
.register-note {
  font:10px/1.8 var(--mono);
  margin-top:20px;
}
.register-note a {
  color:var(--accent);
}
.operator {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:90px;
}
.operator .text-link {
  margin-top:24px;
}
.operator-list article {
  padding:24px 0;
  border-top:1px solid var(--line);
}
.operator-list article:first-child {
  padding-top:0;
  border-top:0;
}
.operator-list .eyebrow {
  margin-bottom:8px;
}
.operator-list p:not(.eyebrow) {
  font-size:14px;
  margin-top:12px;
}
.safety-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:70px;
  align-items:center;
}
.safety figure img {
  width:100%;
  border:1px solid var(--line);
}
.safety-flow {
  list-style:none;
  padding:0;
  margin:24px 0;
}
.safety-flow li {
  padding:13px 0;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:100px 1fr;
  gap:18px;
  font-size:13px;
}
.safety-flow strong {
  font-weight:500;
  color:var(--accent);
}
.safety-flow span {
  color:var(--muted);
}
.fine-print {
  font-size:12px;
}
.build {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:90px;
}
.build p:not(.eyebrow) {
  margin-top:24px;
  max-width:500px;
  font-size:15px;
}
.build-links a {
  display:flex;
  justify-content:space-between;
  gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  font-size:19px;
}
.build-links small {
  display:block;
  font-size:12px;
  color:var(--muted);
  margin-top:6px;
}
.build-links a>span:last-child {
  color:var(--accent);
}
.footer {
  padding-block:28px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:25px;
}
.footer p,.footer>a:last-child {
  font:11px/1.7 var(--mono);
}
@media(min-width:1700px) {
  .hero {
    min-height:750px;
  }
  .hero-art img {
    object-fit:contain;
    background:#050b16;
  }
}
@media(max-width:1100px) {
  .container {
    width:calc(100% - 56px);
  }
  .hero {
    min-height:610px;
  }
  .hero:after {
    background:linear-gradient(90deg,rgba(2,6,23,.9),rgba(2,6,23,.4) 48%,transparent 75%);
  }
  .hero-statement {
    max-width:420px;
  }
  .hardware,.operator,.safety-grid,.build {
    gap:40px;
  }
  .spec-list>div {
    grid-template-columns:1fr;
    gap:6px;
  }
  .section-heading {
    gap:40px;
  }
  .nav {
    gap:24px;
  }
  .nav-links {
    gap:20px;
  }
  .operator-link {
    padding-left:20px;
  }
  .commissioning {
    grid-template-columns:200px 1fr;
  }
}
@media(max-width:760px) {
  html {
    scroll-padding-top:24px;
  }
  .container {
    width:calc(100% - 40px);
  }
  .section {
    padding-block:54px;
  }
  .nav {
    min-height:76px;
    flex-wrap:wrap;
    gap:0;
    justify-content:space-between;
    padding-block:12px;
  }
  .brand {
    font-size:21px;
  }
  .brand img {
    width:27px;
    height:27px;
  }
  .nav-links {
    order:3;
    flex-basis:100%;
    margin:8px 0 -6px;
    gap:14px;
    flex-wrap:wrap;
    border-top:1px solid var(--line);
    padding-top:5px;
  }
  .nav a:not(.brand) {
    font-size:11px;
  }
  .operator-link {
    padding-left:0;
    border:0;
  }
  .hero {
    display:block;
    min-height:0;
    padding-bottom:300px;
  }
  .hero-content {
    padding-block:44px 10px;
  }
  .hero .eyebrow {
    margin-bottom:18px;
  }
  .hero h1 {
    font-size:clamp(48px,15vw,68px);
    letter-spacing:-4px;
    margin-bottom:20px;
  }
  .hero-statement {
    font-size:27px;
    max-width:420px;
  }
  .hero-description {
    font-size:15px;
    max-width:400px;
  }
  .hero-art {
    top:auto;
    height:340px;
  }
  .hero-art img {
    object-fit:cover;
    object-position:85% center;
    width:100%;
    height:100%;
  }
  .hero:after {
    background:linear-gradient(180deg,var(--bg) 54%,transparent 76%);
  }
  .hero-caption {
    bottom:15px;
    right:20px;
    font-size:9px;
  }
  .actions {
    gap:10px;
    margin-top:24px;
  }
  .button {
    padding:12px 16px;
    gap:12px;
  }
  .development-note {
    font-size:10px;
    margin-top:18px;
  }
  .hardware,.operator,.safety-grid,.build,.section-heading {
    grid-template-columns:1fr;
    gap:32px;
  }
  .hardware {
    gap:22px;
  }
  .product-figure {
    max-width:500px;
    margin-inline:auto;
  }
  .spec-list>div {
    grid-template-columns:100px 1fr;
  }
  .section-heading {
    margin-bottom:26px;
  }
  .commissioning {
    grid-template-columns:1fr;
    gap:8px;
    padding:20px;
  }
  .status-key {
    grid-template-columns:1fr 1fr;
    gap:22px;
  }
  .status-key dd {
    font-size:12px;
  }
  summary {
    font-size:16px;
    gap:16px;
    min-height:70px;
  }
  .group-content {
    padding-left:0;
  }
  .capability-row {
    grid-template-columns:1fr;
    gap:10px;
  }
  .register-note {
    font-size:10px;
  }
  .safety-grid>figure {
    order:2;
  }
  .safety-flow li {
    grid-template-columns:88px 1fr;
  }
  .footer {
    align-items:flex-start;
    flex-wrap:wrap;
  }
  .footer p {
    display:none;
  }
  .footer>a:last-child {
    max-width:155px;
    min-height:44px;
    text-align:right;
  }
  .eyebrow {
    margin-bottom:18px;
  }
  h2 {
    letter-spacing:-1px;
  }
  .intro {
    font-size:16px;
  }
}
.motion-studies,.interactive-study {
  border-top:1px solid var(--line);
}
.motion-grid { margin-top:42px; }
.hardware-motion { grid-column:1 / -1; width:100%; }
.motion-study {
  min-width:0;
  display:grid;
  grid-template-columns:minmax(0,1.8fr) minmax(240px,1fr);
  column-gap:48px;
  align-items:center;
}
.motion-study video { grid-column:1; grid-row:1; }
.motion-study .motion-toggle { grid-column:1; grid-row:2; }
.motion-study figcaption { grid-column:2; grid-row:1 / 3; }
@media (max-width:760px) {
  .motion-study { display:block; }
}
.motion-study video {
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16 / 9;
  background:transparent;
  border:0;
}
.motion-study video:not([controls]) {
  mask-image:linear-gradient(to right,transparent,#000 5%,#000 95%,transparent),linear-gradient(to bottom,transparent,#000 7%,#000 90%,transparent);
  mask-composite:intersect;
}
.motion-toggle {
  display:block;
  margin:8px 0 0 auto;
  padding:8px 0 8px 14px;
  min-height:44px;
  border:0;
  background:transparent;
  color:var(--muted);
  font:11px var(--mono);
  cursor:pointer;
}
.motion-toggle[hidden] { display:none; }
.motion-toggle:hover { color:var(--accent); }
.motion-toggle:focus-visible { outline:2px solid var(--accent); outline-offset:4px; }
.motion-study video:focus-visible {
  outline:2px solid var(--accent);
  outline-offset:5px;
}
.motion-study figcaption {
  margin:0;
  padding:24px 0 0;
  text-align:left;
  font:inherit;
  color:var(--ink);
}
.motion-study .eyebrow {
  display:block;
  margin-bottom:12px;
}
.motion-study figcaption p {
  margin-top:14px;
  font-size:14px;
  line-height:1.8;
}
.motion-study .text-link {
  display:inline-flex;
  align-items:center;
  min-height:44px;
  margin-top:14px;
}
.motion-note {
  margin-top:30px;
  font-size:12px;
  max-width:820px;
}
@media(max-width:760px) {
  .motion-grid {
    grid-template-columns:1fr;
    gap:38px;
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto;
  }
}

/* One shared study player; the selector scrolls independently on narrow screens. */
.motion-selector {
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding:6px 3px 12px;
  border-bottom:1px solid var(--line);
  scrollbar-color:var(--muted) var(--bg);
}
.motion-selector[hidden] { display:none; }
.motion-selector [role=tab] {
  flex:0 0 auto;
  min-height:44px;
  padding:10px 2px;
  border:0;
  border-bottom:2px solid transparent;
  background:transparent;
  color:var(--muted);
  font:12px var(--mono);
  cursor:pointer;
}
.motion-selector [aria-selected=true] { color:var(--accent); border-bottom-color:var(--accent); }
.motion-selector [role=tab]:focus-visible { outline:2px solid var(--accent); outline-offset:1px; }
#study-panel:focus-visible { outline:2px solid var(--accent); outline-offset:4px; }