/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: #0A0B0FCC;
  border-bottom: 1px solid var(--border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: var(--step--1);
}

.site-nav a:not(.btn) {
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}
.site-nav a:not(.btn):hover { color: var(--text-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--space-xs);
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--space-sm) var(--space-md) var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg);
}
.mobile-nav a {
  padding: var(--space-sm) 0;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-nav.is-open { display: flex; }

@media (max-width: 780px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
}

.hero__content {
  position: relative;
  z-index: 1;
}

/* Persistent scroll-linked node-graph signature.
   Full-bleed behind the hero by default; docks into a small
   badge below the header once the user scrolls past the hero
   and keeps animating for the rest of the page. */
.scene-companion {
  position: fixed;
  top: 0;
  right: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  overflow: hidden;
  border-radius: 0;
  background: transparent;
  pointer-events: none;
  transition:
    width var(--duration-slow) var(--ease-out),
    height var(--duration-slow) var(--ease-out),
    top var(--duration-slow) var(--ease-out),
    right var(--duration-slow) var(--ease-out),
    border-radius var(--duration-slow) var(--ease-out);
}

.scene-companion.is-docked {
  top: 88px;
  right: 24px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
}

/* Decoupled from the size transition so the chip background only
   appears once the shrink is fully settled — otherwise a large,
   still-shrinking box briefly dims the content behind it. */
.scene-companion__backdrop {
  position: absolute;
  inset: 0;
  background: var(--bg-elevated);
  box-shadow: 0 8px 24px #00000066, inset 0 0 0 1px var(--border-subtle);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}
.scene-companion.is-settled .scene-companion__backdrop {
  opacity: 1;
}

@media (max-width: 640px) {
  .scene-companion.is-docked { display: none; }
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--duration-med) var(--ease-out);
}
.hero__poster.is-visible { opacity: 1; }
.scene-companion.is-docked .hero__poster { display: none; }

.hero__panel {
  max-width: 640px;
  padding: var(--space-lg);
}

.hero__eyebrow {
  color: var(--accent-glow);
  margin-bottom: var(--space-sm);
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero__subhead {
  font-size: var(--step-1);
  max-width: 46ch;
  margin-bottom: var(--space-lg);
}

.hero__cta-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Section heading */
.section-heading {
  margin-bottom: var(--space-lg);
  max-width: 46ch;
}
.section-heading__label {
  color: var(--accent-glow);
  margin-bottom: var(--space-xs);
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}
@media (max-width: 480px) {
  .card-grid { grid-template-columns: 1fr; }
}

/* Case studies */
.case-study {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border-subtle);
}
.case-study__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.case-study--alt .case-study__copy { order: 2; }
@media (max-width: 900px) {
  .case-study__grid { grid-template-columns: 1fr; }
  .case-study--alt .case-study__copy { order: 0; }
  .case-study--alt .case-study__diagram { order: -1; }
}
.case-study__copy > * + * { margin-top: var(--space-sm); }
.case-study__client { color: var(--accent-glow); }
.case-study__label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: var(--space-md) !important;
}
.case-study__diagram {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

/* About */
.credentials-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg);
  color: var(--accent-glow);
}
.credentials-list li {
  display: flex;
  align-items: center;
  gap: 0.6em;
}
.credentials-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 6px var(--accent-primary);
  flex-shrink: 0;
}
.about__copy {
  max-width: 68ch;
}
.about__copy > * + * { margin-top: var(--space-md); }

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--accent-primary-dim), var(--accent-glow-dim));
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.cta-band__inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}
.cta-band h2 { max-width: 20ch; }

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-xl);
}
@media (max-width: 900px) {
  .contact__grid { grid-template-columns: 1fr; }
}
.contact__intro { margin-top: var(--space-md); }
.contact__email {
  display: inline-block;
  margin-top: var(--space-md);
  font-family: var(--font-mono);
  color: var(--accent-glow);
  border-bottom: 1px solid var(--accent-glow);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-lg) 0;
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--text-muted);
}
.wordmark--sm { font-size: var(--step-0); }