/* =============================================================================
   lib/styles/pages/case_studies_page.css — Total Solutions Case Studies Page
   ============================================================================= */

.case-studies-page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-surface-primary, #ffffff);
}

.case-studies-page__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-12, 3rem);
}

/* Metadata tag for the Dark Header */
.case-studies-page__meta-tag {
  display: inline-flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text-inverse, #ffffff);
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-full, 9999px);
  font-size: var(--font-size-sm, 0.875rem);
  font-weight: 500;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* --- Intro & Filters --- */
.case-studies-page__intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-4, 1rem);
  margin-bottom: var(--space-4, 1rem);
}

.case-studies-page__title {
  font-family: var(--font-heading, system-ui, sans-serif);
  font-size: var(--font-size-h3, 1.5rem);
  font-weight: 700;
  color: var(--color-text-primary, #111827);
  margin: 0;
}

.case-studies-page__copy {
  font-size: var(--font-size-body-lg, 1.125rem);
  color: var(--color-text-secondary, #4b5563);
  line-height: 1.6;
  max-width: 75ch;
  margin: 0;
}

.case-studies-page__filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3, 0.75rem);
  margin-top: var(--space-4, 1rem);
}

.case-studies-page__filter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0 var(--space-4, 1rem);
  border: 1px solid var(--color-border, #d1d5db);
  border-radius: var(--radius-full, 9999px);
  background-color: var(--color-surface-primary, #ffffff);
  color: var(--color-text-secondary, #4b5563);
  font-size: var(--font-size-sm, 0.875rem);
  font-weight: 500;
  text-decoration: none;
  transition: 
    background-color var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out),
    border-color var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out),
    color var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out),
    box-shadow var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out);
  cursor: pointer;
}

.case-studies-page__filter:hover {
  background-color: var(--color-background-alt, #f9fafb);
  border-color: var(--color-text-secondary, #6b7280);
}

.case-studies-page__filter--active {
  background-color: var(--color-primary, #0052e0);
  border-color: var(--color-primary, #0052e0);
  color: var(--color-text-inverse, #ffffff);
  box-shadow: 0 4px 12px rgba(0, 82, 224, 0.25);
}

.case-studies-page__filter--active:hover {
  background-color: var(--color-primary, #0052e0);
  border-color: var(--color-primary, #0052e0);
  opacity: 0.9;
}

/* --- Grid --- */
.case-studies-page__grid {
  display: grid;
  gap: var(--space-6, 1.5rem);
}

@media (min-width: 960px) {
  .case-studies-page__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8, 2rem);
  }
}

.case-studies-page__empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-12, 3rem);
  background-color: var(--color-background-alt, #f9fafb);
  border: 1px dashed var(--color-border, #d1d5db);
  border-radius: var(--radius-lg, 0.75rem);
}

/* --- Premium CTA Strip --- */
.case-studies-page__cta-strip {
  background: linear-gradient(135deg, var(--color-trust-navy, #0F294A) 0%, #0a1b33 100%);
  color: var(--color-text-inverse, #ffffff);
  padding: var(--space-10, 2.5rem);
  border-radius: var(--radius-xl, 1.5rem);
  text-align: center;
  margin-top: var(--space-8, 2rem);
  box-shadow: 0 10px 25px -5px rgba(15, 41, 74, 0.2);
}

.case-studies-page__cta-title {
  font-family: var(--font-heading, system-ui, sans-serif);
  font-size: var(--font-size-h3, 1.5rem);
  font-weight: 700;
  margin-top: 0;
  margin-bottom: var(--space-3, 0.75rem);
  color: var(--color-text-inverse, #ffffff);
}

.case-studies-page__cta-copy {
  font-size: var(--font-size-body, 1rem);
  color: rgba(255, 255, 255, 0.85);
  margin: 0 auto var(--space-6, 1.5rem) auto;
  max-width: 60ch;
  line-height: 1.6;
}

/* White button for Dark Strip */
.case-studies-page__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 var(--space-8, 2rem);
  border-radius: var(--radius-full, 9999px);
  font-weight: 600;
  font-size: var(--font-size-body, 1rem);
  text-decoration: none;
  transition: 
    transform var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out),
    background-color var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out),
    opacity var(--motion-duration-fast, 200ms) var(--motion-ease-out, ease-out);
  cursor: pointer;
  border: none;
  width: 100%;
}

@media (min-width: 600px) {
  .case-studies-page__btn {
    width: auto;
  }
}

.case-studies-page__btn:active {
  transform: scale(0.98);
}

.case-studies-page__btn--secondary {
  background-color: var(--color-surface-primary, #ffffff);
  color: var(--color-trust-navy, #0F294A);
}

.case-studies-page__btn--secondary:hover {
  background-color: #f3f4f6;
}

/* =========================================================================
   Choreographed Load Sequences (ScrollReveal Integration for Custom Blocks)
   ========================================================================= */

@media (prefers-reduced-motion: no-preference) {
  /* Intro Block Stagger */
  .case-studies-page__intro > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out),
                transform var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out);
  }

  .is-visible.case-studies-page__intro > *,
  .is-visible .case-studies-page__intro > * {
    opacity: 1;
    transform: translateY(0);
  }

  .is-visible .case-studies-page__intro > :nth-child(1) { transition-delay: 0.1s; }
  .is-visible .case-studies-page__intro > :nth-child(2) { transition-delay: 0.2s; }
  .is-visible .case-studies-page__intro > :nth-child(3) { transition-delay: 0.35s; }


  /* Grid Cards Stagger */
  .case-studies-page__grid > * {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out),
                transform var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out);
  }

  .is-visible.case-studies-page__grid > *,
  .is-visible .case-studies-page__grid > * {
    opacity: 1;
    transform: translateY(0);
  }

  .is-visible .case-studies-page__grid > :nth-child(1) { transition-delay: 0.1s; }
  .is-visible .case-studies-page__grid > :nth-child(2) { transition-delay: 0.2s; }
  .is-visible .case-studies-page__grid > :nth-child(3) { transition-delay: 0.3s; }
  .is-visible .case-studies-page__grid > :nth-child(4) { transition-delay: 0.4s; }
  .is-visible .case-studies-page__grid > :nth-child(n+5) { transition-delay: 0.5s; }


  /* Premium CTA Strip Stagger */
  .case-studies-page__cta-strip > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out),
                transform var(--motion-duration-medium, 400ms) var(--motion-ease-out, ease-out);
  }

  .is-visible.case-studies-page__cta-strip > *,
  .is-visible .case-studies-page__cta-strip > * {
    opacity: 1;
    transform: translateY(0);
  }

  .is-visible .case-studies-page__cta-strip > :nth-child(1) { transition-delay: 0.1s; }
  .is-visible .case-studies-page__cta-strip > :nth-child(2) { transition-delay: 0.25s; }
  .is-visible .case-studies-page__cta-strip > :nth-child(3) { transition-delay: 0.4s; }
}