@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  @keyframes fadeUp {
    from {
      opacity: 0;
      transform: none;
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface-page);
  border-bottom: var(--border-w) solid var(--border-hairline);
  transition: background var(--dur-base) var(--ease-out);
}

.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-4) var(--page-margin);
}

.logotype {
  display: block;
  flex: 0 0 auto;
  height: 27px;
  width: auto;
  color: var(--text-primary);
}

.logotype-dot {
  fill: var(--accent);
}

.theme-toggle {
  width: var(--control-h-md);
  height: var(--control-h-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  border: var(--border-w) solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  transition: var(--transition-control);
}

.theme-toggle:active {
  border-color: var(--border-strong);
  background: var(--surface-sunken);
  color: var(--text-primary);
}

@media (hover: hover) {
  .theme-toggle:hover {
    border-color: var(--border-strong);
    background: var(--surface-sunken);
    color: var(--text-primary);
  }
}

.theme-toggle svg {
  display: none;
  flex: 0 0 auto;
}

[data-theme="light"] .theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 620px;
  display: flex;
  animation: fadeUp var(--dur-reveal) var(--ease-out) both;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--surface-page);
}

.hero-bg svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-man,
.hero-node {
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0);
  opacity: 0;
  transition:
    transform var(--dur-agent) var(--ease-out),
    opacity var(--dur-agent) var(--ease-out);
}

.hero-node {
  fill: transparent;
}

.hero-man.is-on,
.hero-node.is-on {
  transform: scale(1);
  opacity: 1;
}

.hero-edge {
  opacity: 0;
  stroke-dasharray: var(--hero-edge-len, 1);
  stroke-dashoffset: var(--hero-edge-len, 1);
  transition:
    opacity var(--dur-agent) var(--ease-out),
    stroke-dashoffset var(--dur-agent) var(--ease-out);
}

.hero-edge.is-on {
  opacity: 1;
  stroke-dashoffset: 0;
}

@media (prefers-reduced-motion: reduce) {
  .hero-man,
  .hero-node,
  .hero-edge {
    transform: none;
    opacity: 1;
    stroke-dasharray: none;
    stroke-dashoffset: 0;
    transition: none;
  }
}

.hero-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    color-mix(in oklab, var(--surface-page) 55%, transparent) 0%,
    color-mix(in oklab, var(--surface-page) 25%, transparent) 50%,
    color-mix(in oklab, var(--surface-page) 68%, transparent) 100%
  );
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-8) var(--page-margin) var(--space-7);
  width: 100%;
}

.display {
  font: var(--text-display);
  letter-spacing: var(--ls-display);
  text-transform: uppercase;
  margin: 0 0 0 -0.06em;
  color: var(--text-primary);
}

.display-line {
  white-space: nowrap;
}

@media (max-width: 640px) {
  .display {
    font-size: clamp(
      26px,
      calc((100vw - 2 * var(--page-margin)) / 10.5),
      40px
    );
  }
}

.agent-count {
  --agent-overhang: 0.12em;
  position: relative;
  display: inline-grid;
  overflow: hidden;
  vertical-align: baseline;
  margin-left: calc(0.06em - var(--agent-overhang));
  margin-right: calc(-1 * var(--agent-overhang));
  padding-left: var(--agent-overhang);
  padding-right: var(--agent-overhang);
}

.agent-count-sizer {
  grid-area: 1 / 1;
  visibility: hidden;
  pointer-events: none;
}

.agent-count-digit {
  position: absolute;
  left: var(--agent-overhang);
  top: 0;
  transition:
    opacity var(--dur-agent) var(--ease-out),
    transform var(--dur-agent) var(--ease-out);
}

.agent-count-digit.is-enter-up {
  opacity: 0;
  transform: translateY(0.35em);
}

.agent-count-digit.is-enter-down {
  opacity: 0;
  transform: translateY(-0.35em);
}

.agent-count-digit.is-exit-up {
  opacity: 0;
  transform: translateY(-0.35em);
}

.agent-count-digit.is-exit-down {
  opacity: 0;
  transform: translateY(0.35em);
}

@media (prefers-reduced-motion: reduce) {
  .agent-count-digit {
    transition: none;
  }
}

.lead {
  font-size: var(--fs-body-lg);
  line-height: var(--lh-body);
  font-family: var(--font-body);
  color: var(--text-secondary);
  max-width: var(--prose-max);
  margin: var(--space-5) 0 0;
}

.section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-9) var(--page-margin);
  border-top: var(--border-w) solid var(--border-hairline);
  animation: fadeUp var(--dur-reveal) var(--ease-out) both;
}

.section-title {
  font: var(--fw-semibold) var(--fs-title-1) / var(--lh-title) var(--font-display);
  letter-spacing: var(--ls-title);
  text-transform: uppercase;
  margin: 0 0 var(--space-5);
}

.prose {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-family: var(--font-body);
  color: var(--text-primary);
  max-width: var(--prose-max);
  margin: 0 0 var(--space-4);
}

.prose:last-child,
.prose-muted {
  margin-bottom: 0;
}

.prose-muted {
  color: var(--text-secondary);
}

.contact-lead {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-family: var(--font-body);
  color: var(--text-secondary);
  margin: 0 0 var(--space-4);
}

.contact-mail {
  display: inline-block;
  font: var(--fw-medium) var(--fs-body-lg) / var(--lh-body) var(--font-mono);
  color: var(--text-primary);
}

.site-footer {
  padding: var(--space-6) var(--page-margin);
  border-top: var(--border-w) solid var(--border-hairline);
  text-align: center;
}

.site-footer span {
  display: block;
  font: var(--text-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  color: var(--text-muted);
}

.site-footer span + span {
  margin-top: var(--space-1);
}