/* Hero — first screen */

.hero {
  --hero-min-height: calc(100vh - var(--header-offset));
  --hero-min-height: calc(100svh - var(--header-offset));
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: var(--spacing-7);
  min-height: var(--hero-min-height);
  padding-block: var(--spacing-7);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 10% auto auto -8%;
  width: min(42vw, 28rem);
  height: min(42vw, 28rem);
  border-radius: 50%;
  background: radial-gradient(
    circle,
    var(--accent-color) 0%,
    transparent 70%
  );
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--accent-color) 18%, transparent) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: -1;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 36rem;
}

.hero__eyebrow {
  margin: 0 0 var(--spacing-3);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent-color);
}

.hero__title {
  margin: 0 0 var(--spacing-4);
  font-size: clamp(2rem, 4.2vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.hero__lead {
  margin: 0 0 var(--spacing-3);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-loose);
  color: var(--text-primary);
  font-weight: 500;
}

.hero__support {
  margin: 0 0 var(--spacing-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-loose);
  color: var(--text-secondary);
}

.hero__proof {
  margin: 0 0 var(--spacing-5);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-5);
}

.hero__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.hero__btn--primary {
  background-color: var(--accent-color);
  color: var(--accent-fg);
  border: 1px solid var(--accent-color);
}

.hero__btn--primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.hero__btn--secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.hero__btn--secondary:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.hero__btn:focus-visible {
  border-color: var(--focus-ring-color);
}

.hero__social {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.hero__social-link {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.hero__social-link:hover {
  color: var(--accent-color);
}

.hero__social-link:focus-visible {
  color: var(--accent-color);
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.hero__diagram {
  width: 100%;
  max-width: 28rem;
  height: auto;
  color: var(--text-secondary);
}

.hero__diagram-panel {
  fill: var(--surface-elevated);
  stroke: var(--border-color);
  stroke-width: 1.5;
}

.hero__diagram-label {
  fill: var(--text-primary);
  font-family: var(--font-family-mono);
  font-size: 13px;
  font-weight: 500;
}

.hero__diagram-flow {
  stroke: var(--accent-color);
  stroke-width: 1.75;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero__diagram-node {
  fill: var(--accent-color);
}

.hero__diagram-panel,
.hero__diagram-flow,
.hero__diagram-node {
  transform-origin: center;
}

@media (prefers-reduced-motion: no-preference) {
  .hero__diagram-panel {
    animation: hero-panel-in 700ms ease both;
  }

  .hero__diagram-panel:nth-of-type(1) { animation-delay: 80ms; }
  .hero__diagram-panel:nth-of-type(2) { animation-delay: 180ms; }
  .hero__diagram-panel:nth-of-type(3) { animation-delay: 280ms; }
  .hero__diagram-panel:nth-of-type(4) { animation-delay: 380ms; }
  .hero__diagram-panel:nth-of-type(5) { animation-delay: 480ms; }

  .hero__diagram-flow {
    stroke-dasharray: 6 8;
    animation: hero-flow 2.4s linear infinite;
  }

  .hero__diagram-node {
    animation: hero-node-pulse 2.4s ease-in-out infinite;
  }
}

@keyframes hero-panel-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes hero-flow {
  to {
    stroke-dashoffset: -28;
  }
}

@keyframes hero-node-pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    min-height: auto;
    padding-block: var(--spacing-6) var(--spacing-7);
  }

  .hero__content {
    max-width: none;
  }

  .hero__visual {
    order: 1;
  }

  .hero__diagram {
    max-width: 22rem;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    width: 100%;
    flex-direction: column;
  }

  .hero__btn {
    width: 100%;
  }

  .hero__social {
    gap: var(--spacing-3) var(--spacing-4);
  }
}