.ai-page {
  --ai-line: rgba(103, 183, 176, .5);
  --ai-glow: rgba(214, 168, 79, .18);
}

.ai-hero {
  padding-bottom: 4.5rem;
}

.ai-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

.ai-principle {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(103, 183, 176, .12), transparent 48%),
    linear-gradient(180deg, rgba(24, 29, 31, .96), rgba(18, 22, 23, .96));
  box-shadow: 0 24px 60px var(--shadow);
}

.ai-principle h2 {
  font-size: clamp(1.65rem, 3.4vw, 2.75rem);
}

.ai-principle p:last-child,
.ai-section-heading > p,
.ai-closing p {
  color: var(--muted);
}

.ai-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 480px);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2rem;
}

.ai-section-heading h2 {
  margin-bottom: 0;
}

.ai-section-heading > p {
  margin-bottom: .35rem;
}

.ai-arc-visual {
  position: relative;
  min-height: 560px;
  margin: 1rem 0 2.5rem;
  overflow: hidden;
  border: 1px solid rgba(42, 50, 52, .78);
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(circle at 82% 16%, rgba(214, 168, 79, .09), transparent 18rem),
    radial-gradient(circle at 20% 82%, rgba(103, 183, 176, .08), transparent 20rem),
    linear-gradient(180deg, rgba(18, 22, 23, .72), rgba(11, 13, 14, .62));
}

.ai-arc-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .02) 1px, transparent 1px);
  background-size: 100% 64px, 96px 100%;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 92%);
}

.ai-arc-visual svg {
  position: absolute;
  inset: 2.25rem 2rem 1.75rem;
  width: calc(100% - 4rem);
  height: calc(100% - 4rem);
  overflow: visible;
}

.ai-arc-shadow,
.ai-arc-line {
  fill: none;
  vector-effect: non-scaling-stroke;
}

.ai-arc-shadow {
  stroke: rgba(0, 0, 0, .55);
  stroke-width: 15;
}

.ai-arc-line {
  stroke: url(#ai-arc-gradient);
  stroke-width: 4;
  stroke-linecap: round;
}

.ai-arc-points {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-arc-points li {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: 116px;
  display: grid;
  justify-items: center;
  gap: .55rem;
  transform: translate(-50%, -50%);
  text-align: center;
}

.ai-arc-points li span {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(214, 168, 79, .58);
  border-radius: 999px;
  background: #0e1112;
  color: var(--amber);
  box-shadow: 0 0 0 8px rgba(11, 13, 14, .86), 0 0 30px var(--ai-glow);
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
}

.ai-arc-points li strong {
  padding: .3rem .55rem;
  border: 1px solid rgba(42, 50, 52, .8);
  border-radius: 999px;
  background: rgba(11, 13, 14, .86);
  color: var(--text);
  font-size: .82rem;
  letter-spacing: .02em;
}

.ai-stage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-stage-card {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 1rem;
  min-height: 190px;
  padding: 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 29, 31, .94), rgba(18, 22, 23, .94));
  box-shadow: 0 18px 42px rgba(0, 0, 0, .28);
}

.ai-stage-card > span {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(103, 183, 176, .45);
  border-radius: 999px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: .74rem;
  font-weight: 800;
}

.ai-stage-card p {
  color: var(--muted);
}

.ai-stage-card h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.ai-stage-label {
  margin-bottom: .45rem;
  color: var(--amber) !important;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.ai-proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.ai-proof-grid article {
  padding: clamp(1.2rem, 3vw, 1.65rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 29, 31, .92), rgba(18, 22, 23, .92));
}

.ai-proof-grid article > span {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.ai-proof-grid p {
  color: var(--muted);
}

.ai-closing {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: end;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid rgba(214, 168, 79, .3);
  border-radius: calc(var(--radius) + 4px);
  background:
    linear-gradient(135deg, rgba(214, 168, 79, .11), transparent 42%),
    linear-gradient(180deg, rgba(24, 29, 31, .94), rgba(18, 22, 23, .94));
}

.ai-closing .hero-actions {
  justify-content: flex-end;
}

@media (max-width: 960px) {
  .ai-hero-grid,
  .ai-section-heading,
  .ai-closing {
    grid-template-columns: 1fr;
  }

  .ai-principle {
    max-width: 680px;
  }

  .ai-proof-grid {
    grid-template-columns: 1fr;
  }

  .ai-closing .hero-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 860px) {
  .ai-arc-visual {
    display: none;
  }

  .ai-stage-grid {
    position: relative;
    grid-template-columns: 1fr;
    gap: .85rem;
  }

  .ai-stage-grid::before {
    content: "";
    position: absolute;
    left: 36px;
    top: 1.5rem;
    bottom: 1.5rem;
    width: 1px;
    background: linear-gradient(180deg, rgba(42, 50, 52, .25), var(--ai-line), rgba(214, 168, 79, .62));
  }

  .ai-stage-card {
    position: relative;
    min-height: 0;
    grid-template-columns: 46px minmax(0, 1fr);
    padding: 1.1rem;
  }

  .ai-stage-card > span {
    position: relative;
    z-index: 1;
    width: 42px;
    height: 42px;
    background: #0e1112;
    box-shadow: 0 0 0 6px rgba(11, 13, 14, .9);
  }
}

@media (max-width: 560px) {
  .ai-hero {
    padding-bottom: 3rem;
  }

  .ai-principle,
  .ai-stage-card,
  .ai-proof-grid article,
  .ai-closing {
    padding: 1rem;
  }

  .ai-stage-grid::before {
    left: 31px;
  }

  .ai-stage-card {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: .8rem;
  }

  .ai-stage-card > span {
    width: 38px;
    height: 38px;
    box-shadow: 0 0 0 4px rgba(11, 13, 14, .9);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-page *,
  .ai-page *::before,
  .ai-page *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}