/* ============================================
   Homepage — Thest.io
   Cauchy-inspired: spacious, warm, minimal
   ============================================ */

/* ---- Hero — full viewport, centered ---- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-4xl);
  background: var(--gradient-hero);
  text-align: center;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 60% 20%, rgba(5, 150, 105, 0.05), transparent 50%),
    radial-gradient(ellipse at 30% 80%, rgba(8, 145, 178, 0.03), transparent 50%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
}

.hero h1 {
  max-width: 16ch;
  margin: 0 auto var(--space-lg);
  color: var(--color-heading);
  font-size: clamp(2.8rem, 2rem + 4vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero__subtitle {
  max-width: 48ch;
  margin: 0 auto var(--space-2xl);
  color: var(--color-copy);
  font-size: var(--font-size-xl);
  line-height: var(--line-height-loose);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.hero__link:hover {
  color: var(--color-accent);
  gap: var(--space-sm);
}

.hero__link .arrow {
  transition: transform var(--transition-fast);
}

.hero__link:hover .arrow {
  transform: translateX(3px);
}

/* ---- Logo Strip ---- */
.logo-strip {
  padding: var(--space-xl) 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-soft);
}

.logo-strip__heading {
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
}

.logo-strip__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md) clamp(1.2rem, 2.4vw, 2rem);
}

.logo-strip__item {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.logo-strip__item:hover {
  opacity: 0.8;
}

.logo-strip__item img {
  height: 28px;
  width: auto;
  display: block;
}

/* ---- Services overview ---- */
.services-overview {
  background: var(--color-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xl);
}

.service-card {
  padding: var(--space-2xl) var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  color: var(--color-white);
}

.service-card__icon svg {
  width: 24px;
  height: 24px;
}

.service-card__icon--rag {
  background: var(--color-accent-teal);
}

.service-card__icon--agents {
  background: var(--color-accent-violet);
}

.service-card__icon--eval {
  background: var(--color-accent);
}

.service-card__icon--prompts {
  background: var(--color-accent-warm);
}

.service-card h3 {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-xl);
  letter-spacing: -0.02em;
}

.service-card p {
  margin-bottom: var(--space-lg);
  color: var(--color-copy);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  transition: gap var(--transition-fast);
}

.service-card__link:hover {
  gap: var(--space-sm);
  color: var(--color-accent);
}

@media (hover: hover) {
  .service-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md);
  }
}

/* ---- Process — Reliability Loop simplified ---- */
.process-overview {
  background: var(--color-surface);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-lg);
  counter-reset: step;
}

.process-step-card {
  position: relative;
  padding: var(--space-xl);
  counter-increment: step;
}

.process-step-card__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-lg);
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  font-variant-numeric: tabular-nums;
}

.process-step-card h3 {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-lg);
  letter-spacing: -0.015em;
}

.process-step-card p {
  margin: 0;
  color: var(--color-copy);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

/* Connector line between steps */
.process-steps::before {
  content: '';
  position: absolute;
  top: calc(var(--space-xl) + 20px);
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 1px;
  background: linear-gradient(90deg, var(--color-border-strong), var(--color-border-strong));
  pointer-events: none;
}

.process-section .container {
  position: relative;
}

/* ---- Differentiators ---- */
.differentiators {
  background: var(--color-bg);
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xl);
}

.diff-item {
  padding: var(--space-2xl) var(--space-xl);
  border-top: 2px solid var(--color-border-strong);
}

.diff-item__label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
}

.diff-item h3 {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-xl);
  letter-spacing: -0.02em;
}

.diff-item p {
  margin: 0;
  color: var(--color-copy);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

/* ---- CTA — clean, warm ---- */
.home-cta {
  text-align: center;
}

.home-cta h2 {
  margin-bottom: var(--space-md);
}

.home-cta p {
  max-width: 52ch;
  margin: 0 auto var(--space-2xl);
  color: var(--color-copy);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
}

.home-cta .cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-steps::before {
    display: none;
  }

  .diff-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-3xl);
  }

  .hero h1 {
    font-size: clamp(2.2rem, 1.6rem + 3vw, 3.2rem);
  }

  .hero__actions {
    flex-direction: column;
    gap: var(--space-md);
  }

  .process-steps {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .home-cta .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 640px) {
  .logo-strip__grid {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--space-sm);
    gap: var(--space-lg);
  }

  .logo-strip__item img {
    height: 22px;
  }
}