/* ============================================================
   erle-it · KI-Seite (violetter Akzent, dezent)
   ============================================================ */

.ai-hero {
  position: relative;
  padding: clamp(var(--space-9), 14vw, var(--space-11)) 0 clamp(var(--space-8), 10vw, var(--space-10));
  overflow: hidden;
  isolation: isolate;
}
.ai-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(124,58,237,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 70% 50% at 80% 80%, rgba(37,99,235,0.06) 0%, transparent 60%),
    linear-gradient(180deg, #fff 0%, var(--color-bg-soft) 100%);
  z-index: -2;
}

/* Animierter Blob */
.ai-blob {
  position: absolute;
  right: -10%;
  top: 5%;
  width: 520px;
  height: 520px;
  max-width: 60vw;
  max-height: 60vw;
  border-radius: 50%;
  background: var(--ai-gradient);
  opacity: 0.08;
  filter: blur(60px);
  z-index: -1;
  animation: ai-blob-drift 24s var(--ease-in-out) infinite;
  pointer-events: none;
}
@keyframes ai-blob-drift {
  0%, 100% { transform: translate(0, 0) scale(1); border-radius: 50% 40% 60% 40%; }
  25%      { transform: translate(-30px, 40px) scale(1.1); border-radius: 40% 60% 50% 50%; }
  50%      { transform: translate(20px, -20px) scale(0.95); border-radius: 60% 40% 50% 60%; }
  75%      { transform: translate(-10px, 30px) scale(1.05); border-radius: 50% 50% 40% 60%; }
}
@media (prefers-reduced-motion: reduce) {
  .ai-blob { animation: none; }
}

.ai-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  background: var(--color-ai-soft);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-ai-accent);
  letter-spacing: var(--tracking-wide);
  margin: 0 0 var(--space-5);
}
.ai-eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.ai-hero h1 {
  font-size: var(--fs-hero);
  max-width: 20ch;
  margin: 0 0 var(--space-5);
}
.ai-hero h1 .grad {
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ai-hero p.hero-sub {
  font-size: var(--fs-lg);
  color: var(--color-muted);
  max-width: 58ch;
  margin: 0 0 var(--space-6);
}

/* AI-Karten: spezielle Variante */
.ai-card-grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 820px) {
  .ai-card-grid { grid-template-columns: 1fr 1fr; }
}
.ai-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}
.ai-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--ai-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-3);
  border-color: rgba(124,58,237,0.3);
}
.ai-card:hover::before { transform: scaleX(1); }

.ai-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ai-accent);
  margin: 0 0 var(--space-3);
  display: block;
}
.ai-card__title {
  font-size: var(--fs-xl);
  color: var(--color-navy);
  margin: 0 0 var(--space-3);
}
.ai-card__text {
  color: var(--color-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  margin: 0 0 var(--space-4);
}
.ai-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.ai-card__tags li {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 10px;
  background: var(--color-ai-soft);
  color: var(--color-ai-accent-2);
  border-radius: var(--r-sm);
  border: 1px solid rgba(124,58,237,0.15);
}

/* Use-Case-Strip */
.usecase-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}
.usecase {
  padding: var(--space-5);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--r);
  text-align: left;
  transition: border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.usecase:hover {
  border-color: var(--color-ai-accent);
  transform: translateY(-2px);
}
.usecase__icon {
  font-size: 24px;
  margin: 0 0 var(--space-3);
  display: block;
}
.usecase__title {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin: 0 0 var(--space-1);
  line-height: var(--lh-snug);
}
.usecase__text {
  font-size: var(--fs-xs);
  color: var(--color-muted);
  margin: 0;
  line-height: var(--lh-base);
}

/* Ansatz / Prinzipien */
.principles {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 820px) {
  .principles { grid-template-columns: 1fr 1fr; }
}
.principle {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-4);
  align-items: start;
}
.principle__num {
  width: 48px; height: 48px;
  border-radius: var(--r);
  background: var(--ai-gradient-soft);
  border: 1px solid rgba(124,58,237,0.2);
  color: var(--color-ai-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-base);
  display: flex;
  align-items: center;
  justify-content: center;
}
.principle h3 {
  font-size: var(--fs-lg);
  margin: 0 0 var(--space-2);
  color: var(--color-navy);
}
.principle p {
  color: var(--color-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  margin: 0;
}

/* AI-CTA-Banner mit Gradient */
.ai-cta {
  background: var(--color-navy);
  background-image: var(--ai-gradient);
  background-blend-mode: multiply;
  color: #fff;
  border-radius: var(--r-xl);
  padding: clamp(var(--space-6), 5vw, var(--space-8));
  display: grid;
  gap: var(--space-5);
  align-items: center;
  position: relative;
  overflow: hidden;
}
.ai-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 100% at 100% 50%, rgba(255,255,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.ai-cta > * { position: relative; z-index: 1; }
@media (min-width: 820px) {
  .ai-cta { grid-template-columns: 1fr auto; }
}
.ai-cta h3 {
  font-size: var(--fs-2xl);
  margin: 0 0 var(--space-2);
  color: #fff;
}
.ai-cta p {
  color: rgba(255,255,255,0.85);
  margin: 0;
  max-width: 52ch;
}