/* ========================================================================
   GEO SOLUTIONS — EXPERTISE PAGES (shared template)
   Used by: /expertise/saas, /expertise/fintech, /expertise/ai-ml,
            /expertise/ecommerce, /expertise/healthtech
   ======================================================================== */

/* ===== HERO ===== */

.expertise-hero {
  padding: var(--space-24) 0 var(--space-16);
  border-bottom: 1px solid var(--color-border-subtle);
}

@media (max-width: 767px) {
  .expertise-hero {
    padding: var(--space-16) 0 var(--space-12);
  }
}

.expertise-hero__inner {
  max-width: 880px;
}

.expertise-hero__breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.expertise-hero__breadcrumb a {
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.expertise-hero__breadcrumb a:hover {
  color: var(--color-accent);
}

.expertise-hero__breadcrumb-sep {
  margin: 0 var(--space-2);
  opacity: 0.5;
}

.expertise-hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  letter-spacing: -0.025em;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-6);
  color: var(--color-text-primary);
}

.expertise-hero h1 .accent {
  color: var(--color-accent);
}

.expertise-hero__lede {
  font-size: clamp(1.125rem, 1.5vw, 1.375rem);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 65ch;
  margin: 0;
}

/* ===== Section base ===== */

.expertise-section {
  padding: var(--space-24) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

@media (max-width: 767px) {
  .expertise-section {
    padding: var(--space-16) 0;
  }
}

.expertise-section__head {
  max-width: 760px;
  margin-bottom: var(--space-12);
}

.expertise-section__head h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  margin: var(--space-3) 0 var(--space-3);
  color: var(--color-text-primary);
}

.expertise-section__head p {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* ===== "What teams ask" — problem list ===== */

.problem-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.problem-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-6);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

@media (min-width: 768px) {
  .problem-item {
    grid-template-columns: 200px 1fr;
    gap: var(--space-8);
    align-items: start;
  }
}

.problem-item__label {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
  text-transform: uppercase;
}

.problem-item__body {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* ===== Approach — 3-4 cards ===== */

.approach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .approach-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.approach-card {
  padding: var(--space-6);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.approach-card__num {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
  text-transform: uppercase;
}

.approach-card__title {
  font-size: var(--text-h4);
  font-weight: var(--weight-medium);
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin: 0;
}

.approach-card__body {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* ===== Engagement patterns ===== */

.engagement-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.engagement-item {
  padding: var(--space-6);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
}

.engagement-item__title {
  font-size: var(--text-body-lg);
  font-weight: var(--weight-medium);
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
}

.engagement-item__body {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-3);
}

.engagement-item__services {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.engagement-item__service-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
}

/* ===== Stack we know — chips ===== */

.stack-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stack-group {
  padding: var(--space-6);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

.stack-group__title {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.stack-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  background: var(--color-bg-base);
}

/* ===== Sister verticals ===== */

.sister-verticals {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .sister-verticals {
    grid-template-columns: repeat(4, 1fr);
  }
}

.sister-vertical {
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: var(--weight-medium);
  font-size: var(--text-body);
  letter-spacing: -0.005em;
  transition: border-color var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}

.sister-vertical:hover {
  border-color: rgba(130, 255, 140, 0.3);
  color: var(--color-accent);
}

/* ===== Final CTA ===== */

.expertise-cta-final {
  padding: var(--space-32) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-base), rgba(130, 255, 140, 0.04));
}

@media (max-width: 767px) {
  .expertise-cta-final {
    padding: var(--space-24) 0;
  }
}

.expertise-cta-final__inner {
  max-width: 720px;
  margin: 0 auto;
}

.expertise-cta-final h2 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  letter-spacing: -0.025em;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-6);
  color: var(--color-text-primary);
}

.expertise-cta-final p {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-8);
}