:root{
  /* brand colors - constant across both themes (header/footer/hero/buttons
     are always the dark navy gradient regardless of page theme) */
  --navy:#171c26;
  --navy-2:#232a3a;
  --slate:#4e5e83;
  --teal:#3ecbd9;
  --teal-dark:#0f7a86; /* darkened from #1f9aa8 for WCAG AA text contrast on white (~5:1) */
  --light:#f2f5fb;
  --radius:12px;
  --maxw:1180px;

  /* surface/text tokens - these flip between light and dark below */
  --ink:#1c2230;
  --heading:#171c26;
  --link:#0f7a86;
  --muted:#5b6478;
  --line:#e2e6ef;
  --bg:#ffffff;
  --bg-alt:#f6f8fc;
  --shadow:0 4px 20px rgba(23,28,38,.08);
  font-size:16px;
}

/* dark mode: OS preference (unless the visitor explicitly chose light via
   the toggle, which stamps data-theme="light") ... */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ink:#dde2ee;
    --heading:#f4f6fb;
    --link:#5fd6e2;
    --muted:#9aa3ba;
    --line:#2a3245;
    --bg:#11151f;
    --bg-alt:#171c28;
    --shadow:0 4px 20px rgba(0,0,0,.35);
  }
}
/* ...or an explicit choice via the toggle, which always wins */
:root[data-theme="dark"]{
  --ink:#dde2ee;
  --heading:#f4f6fb;
  --link:#5fd6e2;
  --muted:#9aa3ba;
  --line:#2a3245;
  --bg:#11151f;
  --bg-alt:#171c28;
  --shadow:0 4px 20px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.55;
}
img,svg{max-width:100%;display:block}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.2;font-weight:800;color:var(--heading);margin:0 0 .5em}
h1{font-size:clamp(1.8rem,3.4vw,2.6rem)}
h2{font-size:clamp(1.4rem,2.4vw,1.9rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}

/* ---------- header ---------- */
.site-header{
  background:linear-gradient(180deg,var(--navy),var(--slate));
  position:sticky;top:0;z-index:50;
  box-shadow:0 2px 10px rgba(0,0,0,.25);
}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.05rem}
.brand:hover{text-decoration:none}
.brand-text em{color:var(--teal);font-style:normal}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.main-nav a{color:#dfe4f0;font-weight:600;font-size:.95rem}
.main-nav a:hover{color:#fff;text-decoration:none}
.main-nav a.active{color:var(--teal)}
.nav-forum-cta{
  background:var(--teal);color:var(--navy)!important;
  padding:8px 14px;border-radius:20px;font-weight:800!important;
}
.nav-forum-cta:hover{background:#5fe0ec}
.theme-toggle{
  background:none;border:0;color:#dfe4f0;cursor:pointer;padding:6px;
  margin-left:14px;display:flex;align-items:center;border-radius:8px;
}
.theme-toggle:hover{color:#fff;background:rgba(255,255,255,.1)}
.theme-toggle .icon-sun{display:none}
.theme-toggle .icon-moon{display:block}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme-toggle .icon-sun{display:block}
  :root:not([data-theme="light"]) .theme-toggle .icon-moon{display:none}
}
:root[data-theme="dark"] .theme-toggle .icon-sun{display:block}
:root[data-theme="dark"] .theme-toggle .icon-moon{display:none}
.nav-toggle{
  display:none;margin-left:auto;background:none;border:0;color:#fff;
  font-size:1.4rem;cursor:pointer;
}
@media (max-width:860px){
  .main-nav{
    position:absolute;top:64px;left:0;right:0;background:var(--navy-2);
    flex-direction:column;align-items:stretch;padding:14px 20px;gap:14px;
    display:none;box-shadow:0 8px 16px rgba(0,0,0,.3);
  }
  .main-nav.open{display:flex}
  .nav-forum-cta{text-align:center}
  .nav-toggle{display:block}
}

/* ---------- hero ---------- */
.hero{
  background:radial-gradient(1200px 400px at 20% -10%,rgba(62,203,217,.18),transparent),
             linear-gradient(180deg,var(--navy),var(--slate) 140%);
  color:#fff;padding:64px 0 72px;
}
.hero h1{color:#fff;max-width:820px}
.hero p.lede{color:#d7dcec;font-size:1.15rem;max-width:640px}
.hero-stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:28px}
.hero-stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius);padding:14px 20px;min-width:130px}
.hero-stat b{display:block;font-size:1.6rem;color:var(--teal)}
.hero-stat span{font-size:.85rem;color:#c7cee3}
.hero-actions{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;padding:11px 22px;border-radius:24px;font-weight:700;
  font-size:.95rem;border:2px solid transparent;
}
.btn:hover{text-decoration:none}
.btn-teal{background:var(--teal);color:var(--navy)}
.btn-teal:hover{background:#5fe0ec}
.btn-outline{border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2)}

/* ---------- sections ---------- */
section.block{padding:56px 0}
section.block.alt{background:var(--bg-alt)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  flex-wrap:wrap;margin-bottom:26px}
.section-head p{color:var(--muted);margin:0}
.see-all{font-weight:700;white-space:nowrap}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid-3,.grid-4{grid-template-columns:1fr}}

.card{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .15s ease,box-shadow .15s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.card-media{
  background:linear-gradient(160deg,var(--navy),var(--slate));
  padding:22px;display:flex;align-items:center;justify-content:center;
}
.card-media svg{width:64px;height:64px}
.card-body{padding:16px 18px 20px;flex:1;display:flex;flex-direction:column}
.card-body h3{margin-bottom:6px;font-size:1.05rem}
.card-body p{color:var(--muted);font-size:.92rem;margin-bottom:10px;flex:1}
.tag-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tag{
  font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:12px;
  background:var(--bg-alt);color:var(--muted);border:1px solid var(--line);
  text-transform:uppercase;letter-spacing:.03em;
}
.tag-status-deployed{background:#e4f8ec;color:#1c7a41;border-color:#c7ecd6}
.tag-status-prototype{background:#fff3d9;color:#9a6400;border-color:#f5deae}
.tag-status-concept{background:#eef0f8;color:#495179;border-color:#dcdff0}
.tag-status-discontinued{background:#fbeaea;color:#a13030;border-color:#f2cccc}

/* ---------- article card / list ---------- */
.article-card .card-media{background:linear-gradient(160deg,var(--teal-dark),var(--navy))}
.article-meta{font-size:.82rem;color:var(--muted);margin-bottom:6px}

/* ---------- robot / article detail ---------- */
.detail-hero{background:var(--bg-alt);padding:40px 0}
.detail-hero-inner{display:flex;gap:30px;align-items:center;flex-wrap:wrap}
.detail-icon{
  background:linear-gradient(160deg,var(--navy),var(--slate));border-radius:20px;
  padding:26px;flex:0 0 auto;
}
.detail-icon svg{width:96px;height:96px}
.detail-head h1{margin-bottom:8px}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0}
.spec-table th,.spec-table td{
  text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);font-size:.95rem;
}
.spec-table th{width:38%;color:var(--muted);font-weight:600}
.video-embed{position:relative;padding-top:56.25%;border-radius:var(--radius);
  overflow:hidden;background:#000;margin:24px 0}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.prose{max-width:760px}
.prose h2{margin-top:1.6em}
.prose p{color:var(--ink)}
.callout{
  background:var(--bg-alt);border-left:4px solid var(--teal);border-radius:8px;
  padding:16px 20px;margin:22px 0;font-size:.95rem;color:var(--muted);
}
.cta-strip{
  background:linear-gradient(160deg,var(--navy),var(--slate));color:#fff;
  border-radius:var(--radius);padding:28px 30px;display:flex;align-items:center;
  justify-content:space-between;gap:20px;flex-wrap:wrap;margin:30px 0;
}
.cta-strip h3{color:#fff;margin:0 0 4px}
.cta-strip p{color:#d7dcec;margin:0}

/* ---------- filters (robot index) ---------- */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filter-bar select,.filter-bar input{
  padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:.9rem;
  background:var(--bg);color:var(--ink);
}
.filter-bar input{flex:1;min-width:180px}

/* ---------- markets ---------- */
.ticker-table{width:100%;border-collapse:collapse;margin:18px 0 34px}
.ticker-table th,.ticker-table td{padding:10px 12px;border-bottom:1px solid var(--line);
  text-align:left;font-size:.92rem}
.ticker-table th{color:var(--muted);text-transform:uppercase;font-size:.75rem;letter-spacing:.04em}
.ticker{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700;
  background:var(--bg-alt);padding:2px 7px;border-radius:6px}
.disclaimer{
  background:#fff3d9;border:1px solid #f5deae;border-radius:var(--radius);
  padding:18px 22px;font-size:.92rem;color:#7a5600;margin:24px 0;
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:16px 0 0}
.breadcrumbs a{color:var(--muted)}
.crumb-sep{margin:0 8px}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#c7cee3;margin-top:60px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding:48px 0 30px}
@media (max-width:800px){.footer-inner{grid-template-columns:1fr 1fr}}
@media (max-width:500px){.footer-inner{grid-template-columns:1fr}}
.footer-brand{color:#fff;margin-bottom:10px}
.footer-col h4{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:14px}
.footer-col a{display:block;color:#c7cee3;margin-bottom:8px;font-size:.92rem}
.footer-col a:hover{color:#fff}
.footer-col p{color:#98a2bd;font-size:.88rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:.8rem;color:#8891ac}
.footer-bottom a{color:#a9b2cc}

/* ---------- misc ---------- */
.eyebrow{color:var(--link);font-weight:800;font-size:.8rem;text-transform:uppercase;
  letter-spacing:.06em;margin-bottom:8px;display:block}
.two-col{display:grid;grid-template-columns:2fr 1fr;gap:40px}
@media (max-width:860px){.two-col{grid-template-columns:1fr}}
.sidebar-box{background:var(--bg-alt);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.sidebar-box h4{font-size:.9rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.sidebar-box a{display:block;margin-bottom:8px;font-size:.92rem}

/* ---------- accessibility ---------- */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
/* ---------- accessibility: skip link ---------- */
.skip-link{
  position:absolute;left:8px;top:-60px;z-index:100;background:var(--navy);color:#fff;
  padding:10px 18px;border-radius:8px;font-weight:700;transition:top .15s ease;
}
.skip-link:focus{top:8px;text-decoration:none}

/* ---------- cookie consent notice ---------- */
/* Deliberately not named "cookie-banner"/"cookie-consent" etc - generic
   filter lists in some ad-blocker extensions hide elements by that exact
   naming pattern, which would hide a *real* consent control users need. */
.hu-consent-notice{
  position:fixed;left:0;right:0;bottom:0;z-index:80;background:var(--navy);
  border-top:1px solid rgba(255,255,255,.15);box-shadow:0 -4px 20px rgba(0,0,0,.3);
}
.hu-consent-notice[hidden]{display:none}
.hu-consent-notice-inner{
  max-width:var(--maxw);margin:0 auto;padding:16px 20px;display:flex;align-items:center;
  gap:20px;flex-wrap:wrap;justify-content:space-between;
}
.hu-consent-notice-inner p{color:#dfe4f0;font-size:.9rem;margin:0;flex:1;min-width:240px}
.hu-consent-notice-inner a{color:var(--teal)}
.hu-consent-notice-actions{display:flex;gap:10px;flex:0 0 auto}
.btn-outline-dark{
  background:transparent;color:#dfe4f0;border-color:rgba(255,255,255,.35);cursor:pointer;
  font-family:inherit;
}
.btn-outline-dark:hover{border-color:#fff;color:#fff}
.hu-consent-notice-actions .btn{cursor:pointer;border:2px solid transparent}