:root {
  --ground: #ECEFF3;
  --surface: #FFFFFF;
  --ink: #0D1420;
  --ink-2: #3A4557;
  --muted: #6C7789;
  --line: #D9DEE6;

  --ai: #2242CE;
  --robotics: #A8540F;
  --cyberdecks: #6237B8;
  --alert: #A32036;

  --font-display: 'Bricolage Grotesque', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Source Sans 3', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 34px; --sp-7: 48px; --sp-8: 64px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #0C1017;
    --surface: #141A24;
    --ink: #E9EDF3;
    --ink-2: #BAC3D0;
    --muted: #838EA0;
    --line: #262F3C;

    --ai: #8AA0F5;
    --robotics: #E2A063;
    --cyberdecks: #B396EE;
    --alert: #EE8E9C;
  }
}

:root[data-theme="dark"] {
  --ground: #0C1017;
  --surface: #141A24;
  --ink: #E9EDF3;
  --ink-2: #BAC3D0;
  --muted: #838EA0;
  --line: #262F3C;

  --ai: #8AA0F5;
  --robotics: #E2A063;
  --cyberdecks: #B396EE;
  --alert: #EE8E9C;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.wrap-wide {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  text-wrap: balance;
  margin: 0 0 var(--sp-4);
}
h1 { font-size: 2.25rem; line-height: 1.08; }
h2 { font-size: 1.375rem; line-height: 1.2; }
h3 { font-size: 1rem; line-height: 1.3; }

.display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 3.25rem;
  line-height: 1.02;
  text-wrap: balance;
  margin: 0 0 var(--sp-4);
}

p { margin: 0 0 var(--sp-4); color: var(--ink-2); max-width: 65ch; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.mono { font-family: var(--font-mono); }

.wordmark {
  font-family: var(--font-mono);
  white-space: nowrap;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  font-size: 1rem;
}

/* --- Header / Nav --- */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 40;
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  padding: var(--sp-4) 0;
  max-width: 1080px;
  margin: 0 auto;
  padding-left: var(--sp-5);
  padding-right: var(--sp-5);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-2);
  font-size: 0.9375rem;
}
.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--ink);
}
.nav-cta {
  border: 1px solid var(--ai);
  color: var(--ai) !important;
  padding: var(--sp-2) var(--sp-4);
  border-radius: 6px;
  font-size: 0.875rem !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
  margin: 0;
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle:hover { background: var(--ground); }
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 760px) {
  .nav-row { position: relative; flex-wrap: nowrap; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: var(--sp-2) var(--sp-5) var(--sp-4);
    box-shadow: 0 8px 16px rgba(13, 20, 32, 0.08);
  }
  .nav-links.nav-open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: var(--sp-3) 0;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }
  .nav-links li:last-child a { border-bottom: none; }
  .nav-cta {
    display: inline-block;
    margin-top: var(--sp-3);
    text-align: center;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  padding: var(--sp-3) var(--sp-5);
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--ai);
  color: #FFFFFF;
}
.btn-outline {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-row { display: flex; gap: var(--sp-4); flex-wrap: wrap; }

/* --- Cards / sections --- */
.section { padding: var(--sp-8) 0; }
.section-tight { padding: var(--sp-7) 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: var(--sp-5);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-5);
}
@media (max-width: 800px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* --- Team headshots: every photo in the same circular frame, no border --- */
.headshot {
  display: block;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 0;
  object-fit: cover;
  object-position: center 25%;
  background: var(--line);
  margin-bottom: var(--sp-5);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px var(--sp-2);
  border-radius: 4px;
  border: 1px solid currentColor;
}
.tag-ai { color: var(--ai); }
.tag-robotics { color: var(--robotics); }
.tag-cyberdecks { color: var(--cyberdecks); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
table td, table th {
  border-bottom: 1px solid var(--line);
  padding: var(--sp-3) var(--sp-3) var(--sp-3) 0;
  text-align: left;
  vertical-align: top;
  color: var(--ink-2);
}
.table-wrap { overflow-x: auto; }

hr.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: var(--sp-7) 0;
}

.closing-line {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.375rem;
  color: var(--ink);
  text-align: center;
  padding: var(--sp-8) 0;
}

footer.site {
  border-top: 1px solid var(--line);
  padding: var(--sp-6) 0;
  color: var(--muted);
  font-size: 0.875rem;
}
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--ink-2); }
.footer-links {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-top: var(--sp-3);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #000;
  padding: var(--sp-8) 0 var(--sp-7);
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* Reduced motion: no autoplaying video, show its first frame instead */
@media (prefers-reduced-motion: reduce) {
  .hero-video { display: none; }
  .hero { background: #000 url('/tunnel-hero-poster.jpg') center / cover no-repeat; }
}

.hero-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero .wrap {
  position: relative;
  z-index: 2;
}

/* Override text colors so they read on dark video bg */
.hero .eyebrow { color: rgba(255,255,255,0.55); }
.hero h1, .hero .display { color: #fff; }
.hero p { color: rgba(255,255,255,0.75); }
.hero .btn-outline {
  border-color: rgba(255,255,255,0.35);
  color: #fff;
}

@media (max-width: 640px) {
  .display { font-size: 2.25rem; }
  h1 { font-size: 1.75rem; }
}