/* ==========================================================================
   USECASE-SPECIFIC STYLES
   Scoped to /usecase/* pages. Uses only existing design tokens.
   ========================================================================== */

/* Section spacing */
.usecase-section {
  padding-block: var(--space-16);
  width: 100%;
}

.usecase-bg-surface {
  background: var(--bg-surface);
}

.usecase-section-header {
  max-width: 48rem;
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--space-12);
}

.usecase-section-eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-500);
  margin-bottom: var(--space-4);
}

.usecase-section-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

@media (min-width: 768px) {
  .usecase-section-title {
    font-size: var(--font-size-3xl);
  }
}

.usecase-section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Problem / Solution two-column layout */
.usecase-two-col-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .usecase-two-col-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12);
  }
}

.usecase-col-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.usecase-card-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.usecase-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  transition: transform var(--duration-160) var(--timing-strong-ease-out),
              box-shadow var(--duration-160) var(--timing-strong-ease-out);
}

.usecase-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.usecase-card-icon {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background: var(--bg-overlay);
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.usecase-card-pain .usecase-card-icon {
  color: var(--color-error-500);
  background: oklch(from var(--color-error-500) l c h / 0.08);
}

.usecase-card-solution .usecase-card-icon {
  color: var(--color-success-500);
  background: oklch(from var(--color-success-500) l c h / 0.08);
}

.usecase-card-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.usecase-card-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Metrics */
.usecase-metrics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .usecase-metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.usecase-metric-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--bg-surface);
  border: 1px solid var(--border-secondary);
}

.usecase-metric-value {
  font-family: var(--font-family-display);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-2);
}

.usecase-metric-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* Features grid */
.usecase-features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

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

@media (min-width: 1024px) {
  .usecase-features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.usecase-feature-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  transition: transform var(--duration-160) var(--timing-strong-ease-out),
              box-shadow var(--duration-160) var(--timing-strong-ease-out);
}

.usecase-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.usecase-feature-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-400));
  color: #fff;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.usecase-feature-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.usecase-feature-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Testimonial */
.usecase-testimonial {
  max-width: 56rem;
  margin-inline: auto;
  text-align: center;
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  background: var(--bg-surface);
  border: 1px solid var(--border-secondary);
}

.usecase-testimonial-avatar-wrap {
  width: 5rem;
  height: 5rem;
  margin-inline: auto;
  margin-bottom: var(--space-5);
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--bg-overlay);
}

.usecase-testimonial-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.usecase-testimonial-quote {
  position: relative;
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.usecase-testimonial-quote-icon {
  color: var(--color-primary-300);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
}

.usecase-testimonial-author {
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.usecase-testimonial-role {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* FAQ */
.usecase-faq-list {
  max-width: 52rem;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.usecase-faq-item {
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  overflow: hidden;
}

.usecase-faq-question {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-5);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
}

.usecase-faq-question::-webkit-details-marker {
  display: none;
}

.usecase-faq-q {
  flex-shrink: 0;
  color: var(--color-primary-500);
  font-weight: var(--font-weight-bold);
}

.usecase-faq-chevron {
  margin-left: auto;
  color: var(--text-tertiary);
  transition: transform var(--duration-200) var(--timing-ease-out);
}

.usecase-faq-item[open] .usecase-faq-chevron {
  transform: rotate(180deg);
}

.usecase-faq-answer {
  padding: 0 var(--space-5) var(--space-5) var(--space-5);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Related / Hub cards */
.usecase-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

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

@media (min-width: 1024px) {
  .usecase-card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.usecase-hub-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  text-decoration: none;
  color: inherit;
  transition: transform var(--duration-160) var(--timing-strong-ease-out),
              box-shadow var(--duration-160) var(--timing-strong-ease-out);
}

.usecase-hub-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.usecase-hub-card-icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-400));
  color: #fff;
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}

.usecase-hub-card-category {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-500);
  margin-bottom: var(--space-2);
}

.usecase-hub-card-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.usecase-hub-card-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.usecase-hub-card-metric {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-secondary);
  margin-bottom: var(--space-4);
}

.usecase-hub-card-metric-value {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
}

.usecase-hub-card-metric-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  display: block;
}

.usecase-hub-card-link {
  margin-top: auto;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-500);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.usecase-hub-card:hover .usecase-hub-card-link {
  color: var(--color-primary-600);
}

/* Hub category blocks */
.usecase-category-block {
  margin-bottom: var(--space-16);
}

.usecase-category-block:last-child {
  margin-bottom: 0;
}

.usecase-category-header {
  margin-bottom: var(--space-8);
  text-align: center;
}

.usecase-category-desc {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .usecase-card,
  .usecase-feature-card,
  .usecase-hub-card {
    transition: none;
  }
  .usecase-card:hover,
  .usecase-feature-card:hover,
  .usecase-hub-card:hover {
    transform: none;
  }
}

/* Hub grid override: sales = 3-up, business = 2x2 desktop, 1-col mobile */
@media (min-width: 1024px) {
  .usecase-card-grid-sales { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .usecase-card-grid-business { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 58rem; margin-inline: auto; }
}
@media (max-width: 767px) {
  .usecase-card-grid-business, .usecase-card-grid-sales { grid-template-columns: 1fr; }
}