/* ============================================
   CASE-STUDY.CSS — Case Study Page Styles
   Nelson Medina Portfolio
   Import after layout.css
============================================ */

/* ============================================
   CASE STUDY HERO
============================================ */

.cs-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.cs-hero__back {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.cs-hero__back:hover {
  color: var(--color-accent);
}

.cs-hero__heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-10);
}

.cs-hero__heading em {
  font-style: italic;
  color: var(--color-accent);
}

/* ============================================
   OVERVIEW BLOCK (metadata + tags)
============================================ */

.cs-overview {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-surface);
  border: var(--border-thin);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-10);
}

.cs-overview__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.cs-overview__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.cs-overview__value {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

.cs-overview__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-5);
  border-top: var(--border-subtle);
}

/* ============================================
   COVER IMAGE
============================================ */

.cs-hero__cover {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface-subtle);
  border: var(--border-thin);
}

.cs-hero__image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 560px;
}

/* ============================================
   SECTION LAYOUT (label + content two-col)
============================================ */

.cs-section--alt {
  background: var(--color-surface-subtle);
  border-top: var(--border-thin);
  border-bottom: var(--border-thin);
}

.cs-section__inner {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-16);
  align-items: start;
}

.cs-section__tag {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding-top: var(--space-2);
  line-height: var(--leading-normal);
}

.cs-section__heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
}

.cs-body {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
  margin-bottom: var(--space-5);
}

.cs-body:last-child {
  margin-bottom: 0;
}

/* ============================================
   CALLOUT BLOCK
============================================ */

.cs-callout {
  background: var(--color-accent-tint);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-6);
}

.cs-callout__text {
  font-size: var(--text-sm);
  color: var(--color-accent);
  line-height: var(--leading-normal);
  font-weight: var(--weight-medium);
}

/* ============================================
   ASSET ROWS
============================================ */

.cs-asset-row {
  padding: var(--space-10) 0;
  background: var(--color-bg);
}

.cs-asset-row__grid {
  display: grid;
  gap: var(--space-5);
}

.cs-asset-row__grid--2 {
  grid-template-columns: 1fr 1fr;
}

.cs-asset-row__grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.cs-asset {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cs-asset--wide {
  grid-column: 1 / -1;
}

.cs-asset__img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: var(--border-thin);
  background: var(--color-surface-subtle);
  object-fit: cover;
  display: block;
}

.cs-asset__caption {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.01em;
}

/* ============================================
   TESTIMONIAL (inline in case study)
============================================ */

.cs-testimonial {
  margin-top: var(--space-10);
  padding: var(--space-8);
  background: var(--color-surface);
  border: var(--border-thin);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.cs-testimonial__quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
}

.cs-testimonial__name {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.cs-testimonial__title {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

/* ============================================
   CASE STUDY NAV (bottom of each case study)
============================================ */

.cs-nav {
  background: var(--color-surface);
  border-top: var(--border-thin);
  padding: var(--space-12) 0;
}

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

.cs-nav__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cs-nav__list {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.cs-nav__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-5);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), color var(--transition-fast);
  min-width: 180px;
}

.cs-nav__link:hover {
  border-color: var(--color-text-primary);
}

.cs-nav__link-title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

.cs-nav__link-sub {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  line-height: var(--leading-normal);
}

.cs-nav__link--active {
  border-color: var(--color-accent);
  background: var(--color-accent-tint);
}

.cs-nav__link--active .cs-nav__link-title {
  color: var(--color-accent);
}

.cs-nav__link--active:hover {
  border-color: var(--color-accent);
}

/* ============================================
   RESPONSIVE — CASE STUDY
============================================ */

@media (max-width: 900px) {
  .cs-overview__grid {
    grid-template-columns: 1fr 1fr;
  }

  .cs-section__inner {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .cs-asset-row__grid--2,
  .cs-asset-row__grid--3 {
    grid-template-columns: 1fr;
  }

  .cs-nav__list {
    flex-direction: column;
  }

  .cs-nav__link {
    min-width: unset;
    width: 100%;
  }
}

@media (max-width: 600px) {
  .cs-hero__heading {
    font-size: var(--text-2xl);
  }

  .cs-overview {
    padding: var(--space-6);
  }

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

  .cs-testimonial {
    padding: var(--space-6);
  }
}