:root {
  --void: #0a0c10;
  --void-2: #0e1116;
  --steel: #e8ecf1;
  --steel-dim: #8690a0;
  --steel-dimmer: #5a6472;
  --accent: #ff6a2a;
  --accent-2: #ffb46a;
  --rule: rgba(255,255,255,0.08);
  --rule-2: rgba(255,255,255,0.14);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --serif: "Fraunces", ui-serif, Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--void);
  color: var(--steel);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }

/* ================= nav ================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px 28px;
  background: linear-gradient(to bottom, rgba(10,12,16,0.75), rgba(10,12,16,0));
  backdrop-filter: blur(6px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, var(--accent-2), var(--accent) 55%, #7a2a0a 100%);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.06), 0 0 24px rgba(255,106,42,0.35);
}
.brand-text { display: inline-flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-weight: 600; font-size: 15px; letter-spacing: 0.02em; }
.brand-text small {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--steel-dim);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}
.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  font-size: 13px;
  color: var(--steel-dim);
}
.nav-links a:hover { color: var(--steel); }
.cta-sm {
  padding: 9px 14px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  font-size: 13px;
  transition: 160ms ease;
}
.cta-sm:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 4px rgba(255,106,42,0.08);
}
@media (max-width: 740px) { .nav-links { display: none; } }

/* ================= hero ================= */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 32px 48px;
  display: grid;
  grid-template-rows: 1fr auto auto;
  gap: 32px;
  overflow: hidden;
}
.hero-media {
  position: absolute; inset: 0;
  z-index: 0;
}
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: contrast(1.05) saturate(0.9) brightness(0.72);
}
.hero-scrim {
  position: absolute; inset: 0;
  background:
    radial-gradient(80% 60% at 50% 30%, rgba(10,12,16,0.1) 0%, rgba(10,12,16,0.7) 70%),
    linear-gradient(to bottom, rgba(10,12,16,0.4), rgba(10,12,16,0.35) 50%, rgba(10,12,16,0.9));
}
.hero-grain {
  position: absolute; inset: 0;
  opacity: 0.18;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}

.hero-grid {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  align-self: end;
  padding-top: 56px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--steel-dim);
  padding: 6px 10px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(255,106,42,0.18);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(40px, 7vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 1100px;
}
.hero-title em {
  font-style: italic;
  color: var(--accent-2);
  font-weight: 300;
}
.hero-lede {
  font-size: clamp(16px, 1.25vw, 20px);
  color: var(--steel);
  opacity: 0.85;
  max-width: 640px;
  margin: 0 0 36px;
}
.hero-cta-row { display: inline-flex; gap: 14px; flex-wrap: wrap; }
.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--accent);
  color: #0b0d10;
  font-weight: 500;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: 180ms ease;
  font-family: var(--sans);
}
.cta:hover { background: var(--accent-2); transform: translateY(-1px); }
.cta-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  color: var(--steel);
  transition: 180ms ease;
}
.cta-ghost:hover { border-color: var(--steel); }

.hero-telemetry {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--rule);
  padding: 1px;
}
.hero-telemetry > div {
  background: rgba(10,12,16,0.5);
  backdrop-filter: blur(4px);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-telemetry strong {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--accent-2);
}
.hero-telemetry span {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--steel-dim);
}
@media (max-width: 740px) {
  .hero-telemetry { grid-template-columns: repeat(2, 1fr); }
}

.hero-cue {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--steel-dim);
  animation: cueFloat 2.2s ease-in-out infinite;
}
@keyframes cueFloat { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 6px); } }

/* ================= chapters ================= */
.chapter {
  position: relative;
  padding: 140px 32px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 48px;
  max-width: 1400px;
  margin: 0 auto;
  border-top: 1px solid var(--rule);
}
.chapter.alt { background: linear-gradient(to bottom, var(--void) 0%, var(--void-2) 50%, var(--void) 100%); max-width: none; }
.chapter.alt > .chapter-rail, .chapter.alt > .chapter-body { max-width: 1400px; }
.chapter.alt { grid-template-columns: 1fr; }
.chapter.alt > .chapter-rail { padding: 0 32px; max-width: 1400px; margin: 0 auto; width: 100%; display: flex; gap: 20px; align-items: center; }
.chapter.alt > .chapter-body { padding: 0 32px; max-width: 1400px; margin: 24px auto 0; }

.chapter-rail {
  position: sticky;
  top: 120px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--steel-dim);
  border-left: 1px solid var(--accent);
  padding-left: 16px;
}
.chapter-rail .rail-code { color: var(--accent); }
.chapter.alt .chapter-rail {
  position: static;
  flex-direction: row;
  border-left: 0;
  padding-left: 0;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
}
.chapter.alt .chapter-rail .rail-code {
  border-left: 2px solid var(--accent);
  padding-left: 12px;
}

.chapter-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(28px, 4.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 32px;
  max-width: 920px;
}
.chapter-title em {
  font-style: italic;
  color: var(--accent-2);
}
.chapter-lede {
  font-size: 18px;
  color: var(--steel-dim);
  max-width: 760px;
  margin: 0 0 48px;
}

/* capability grid */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.cap {
  background: var(--void);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: 220ms ease;
}
.cap:hover { background: var(--void-2); }
.cap-no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.cap h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 28px;
  margin: 0;
}
.cap-cap {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--steel-dim);
  margin: 0 0 4px;
}
.cap p { color: var(--steel-dim); margin: 0; }
@media (max-width: 740px) { .capability-grid { grid-template-columns: 1fr; } }

/* space rows */
.space-rows { display: flex; flex-direction: column; gap: 48px; }
.space {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}
.space.reverse { grid-template-columns: 1fr 1.1fr; }
.space.reverse img { order: 2; }
.space.reverse > div { order: 1; }
.space img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  filter: brightness(0.86) saturate(0.95);
}
.space h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(24px, 2.4vw, 36px);
  margin: 0 0 10px;
}
.space p { color: var(--steel-dim); max-width: 540px; }
@media (max-width: 820px) {
  .space, .space.reverse { grid-template-columns: 1fr; }
  .space.reverse img, .space.reverse > div { order: initial; }
}

/* tech grid */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.tech-cell {
  background: var(--void);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 128px;
}
.tech-k {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
}
.tech-v {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.2;
}
@media (max-width: 980px) { .tech-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .tech-grid { grid-template-columns: 1fr; } }

/* enquiry */
.enquiry {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 920px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field.col-2 { grid-column: 1 / -1; }
.field label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--steel-dim);
}
.field input, .field select, .field textarea {
  background: transparent;
  border: 1px solid var(--rule-2);
  color: var(--steel);
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 15px;
  border-radius: 2px;
  transition: 160ms ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(255,106,42,0.1);
}
.field select { appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%23ff6a2a' stroke-width='1.5' fill='none'/></svg>"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 44px; }
.form-note { grid-column: 1 / -1; font-family: var(--mono); font-size: 12px; color: var(--steel-dim); }
.form-note a { color: var(--accent); border-bottom: 1px solid currentColor; padding-bottom: 1px; }
.enquiry > .cta { justify-self: start; }
@media (max-width: 740px) { .enquiry { grid-template-columns: 1fr; } }

/* ================= footer ================= */
.foot {
  padding: 80px 32px 40px;
  background: var(--void-2);
  border-top: 1px solid var(--rule);
}
.foot-main {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}
.foot h4 {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin: 0 0 10px;
}
.foot p { color: var(--steel-dim); margin: 0; font-size: 14px; }
.foot-copy { max-width: 320px; margin-top: 14px; }
.foot-rule {
  max-width: 1400px;
  margin: 48px auto 20px;
  height: 1px;
  background: var(--rule);
}
.foot-fine {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--steel-dimmer);
}
@media (max-width: 820px) { .foot-main { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot-main { grid-template-columns: 1fr; } }

/* subtle reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: 650ms cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }