/**
 * Case Study page
 * Shared styles for all case study pages.
 */

/* ── Back navigation bar ── */
.case-study__back-bar {
  padding-block: 32px;
}

.card__btn--back {
  width: auto;
  gap: 8px;
  text-decoration: none;
}

.card__btn-icon--back {
  transform: rotate(180deg);
  display: inline-block;
}

/* ── Hero ── */
.case-study__hero {
  padding-block: var(--about-margin-block);
  border-bottom: var(--card-border-width) solid var(--card-border-color);
}

.case-study__hero-content.col-span-12 {
  grid-column: span 12;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-study__label {
  margin: 0;
  font-family: var(--font-family-script);
  font-size: var(--font-size-about-label);
  color: var(--color-card-btn-bg);
  line-height: 1;
}

.case-study__title {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: 3.5rem;
  font-weight: 400;
  line-height: 1.05em;
  color: var(--color-hero-heading);
}

.case-study__subtitle {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-about-body);
  font-weight: 100;
  color: var(--color-card-date);
  line-height: var(--line-height-about);
}

/* ── Meta row ── */
.case-study__meta {
  border-bottom: var(--card-border-width) solid var(--card-border-color);
  padding-block: 40px;
}

.case-study__meta-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.case-study__meta-item.col-span-3 {
  grid-column: span 3;
}

.case-study__meta-label {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-card-date);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.case-study__meta-value {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-card-text);
}

/* ── Cover image ── */
.case-study__cover {
  margin-block: 0;
}

.case-study__cover-placeholder {
  width: 100%;
  height: 480px;
  background-color: var(--card-border-color);
  opacity: 0.15;
}

/* ── Content sections ── */
.case-study__section {
  padding-block: var(--about-margin-block);
  border-bottom: var(--card-border-width) solid var(--card-border-color);
}

.case-study__section-label.col-span-12 {
  grid-column: span 12;
  margin-bottom: 8px;
}

.case-study__section-content.col-span-8 {
  grid-column: span 8;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.case-study__heading {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-about-title);
  font-weight: 400;
  line-height: 1.1em;
  color: var(--color-hero-heading);
}

.case-study__body {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-about-body);
  font-weight: 100;
  line-height: var(--line-height-about);
  color: var(--color-card-text);
}

.case-study__image-placeholder {
  grid-column: span 12;
  height: 360px;
  background-color: var(--card-border-color);
  opacity: 0.15;
  border-radius: 4px;
  margin-top: 24px;
}

/* ── Description ── */
.case-study__description {
  padding-block: 40px;
  border-bottom: var(--card-border-width) solid var(--card-border-color);
}

.case-study__description-content.col-span-12 {
  grid-column: span 12;
}

/* ── Project detail row ── */
.case-study__detail {
  padding-block: var(--about-margin-block);
  border-bottom: var(--card-border-width) solid var(--card-border-color);
}

.case-study__detail-grid {
  align-items: start;
}

.case-study__detail-grid .case-study__meta-item {
  padding-top: 32px;
  border-top: var(--card-border-width) solid var(--card-border-color);
}

.case-study__detail-grid .case-study__meta-label {
  font-size: 1.25rem;
}

.case-study__detail-grid .case-study__meta-value {
  font-size: 1.5rem;
}

.case-study__detail-info {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.case-study__detail-info .case-study__body {
  font-size: 1.5rem;
}

.case-study__detail-heading {
  margin: 0;
  font-family: var(--font-family-primary);
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.2em;
  color: var(--color-hero-heading);
}

.case-study__detail-screenshots {
  grid-column: span 8;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.case-study__detail-screenshots.col-span-12 {
  grid-column: span 12;
}

.case-study__screenshot {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

.case-study__screenshot-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px;
}

.case-study__screenshot-row--compact {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.case-study__screenshot-row--compact .case-study__screenshot--xs {
  flex: none;
  width: 100%;
}

.case-study__screenshot-row--compact-8 {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
}

.case-study__screenshot-row--compact-8 .case-study__screenshot--xs {
  flex: none;
  width: 100%;
  min-width: 0;
}

.case-study__screenshot-row--grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.case-study__screenshot-row--grid-4 .case-study__screenshot--sm {
  flex: none;
  width: 100%;
  min-width: 0;
}

.case-study__screenshot-row--uniform-height .case-study__screenshot--sm {
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: top;
}

.case-study__screenshot--sm {
  flex: 0 0 240px;
  width: 240px;
  height: auto;
  display: block;
  border-radius: 4px;
}

.case-study__screenshot--lg {
  flex: 1 1 360px;
  min-width: 0;
  height: auto;
  display: block;
  border-radius: 4px;
}

.case-study__screenshot--xs {
  flex: 0 0 160px;
  width: 160px;
  height: auto;
  display: block;
  border-radius: 4px;
}

.case-study__screenshot--crop-top {
  height: 463px;
  object-fit: cover;
  object-position: top;
}

.case-study__screenshot-placeholder {
  width: 100%;
  height: 280px;
  background-color: var(--card-border-color);
  opacity: 0.15;
  border-radius: 4px;
}

/* ── Lightbox ── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox[hidden] {
  display: none;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  cursor: zoom-out;
}

.lightbox__frame {
  position: relative;
  z-index: 1;
  width: 90vw;
  max-height: 90vh;
  overflow: auto;
  border-radius: 4px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.lightbox__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: var(--card-border-width) solid var(--card-border-color);
  background: transparent;
  color: var(--color-hero-heading);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.lightbox__close:hover,
.lightbox__close:focus-visible {
  background: var(--color-card-btn-bg);
  border-color: var(--color-card-btn-bg);
  outline: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .case-study__section .col-span-6 {
    grid-column: span 12;
  }

  .case-study__section .col-span-8 {
    grid-column: span 12;
  }

  .case-study__meta-item.col-span-3 {
    grid-column: span 6;
  }

  .case-study__section-content.col-span-8 {
    grid-column: span 12;
  }

  .case-study__cover-placeholder {
    height: 240px;
  }

  .case-study__heading {
    font-size: 2rem;
  }

  .case-study__detail-info {
    grid-column: span 12;
  }

  .case-study__detail-screenshots {
    grid-column: span 12;
  }

  .case-study__screenshot-placeholder {
    height: 200px;
  }

  .case-study__screenshot--sm {
    flex: 0 0 180px;
    width: 180px;
  }

  .case-study__screenshot--xs {
    flex: 0 0 120px;
    width: 120px;
  }

  .case-study__screenshot-row--grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-study__screenshot-row--compact-8 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 480px) {
  .case-study__meta-item.col-span-3 {
    grid-column: span 12;
  }

  .case-study__screenshot-row--grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-study__screenshot-row--compact-8 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ── Content list ── */
.case-study__list {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: disc;
}

.case-study__list li {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-about-body);
  font-weight: 100;
  color: var(--color-card-text);
  line-height: var(--line-height-about);
}

/* ── Competitive Analysis ── */
.case-study__competitive {
  margin-bottom: var(--about-margin-block);
  padding-top: var(--about-margin-block);
}

.case-study__competitive-intro {
  margin-bottom: 48px;
}

.case-study__competitive-summary {
  margin-top: 16px;
  opacity: 0.5;
}

.case-study__competitor {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 32px;
  border: var(--card-border-width) solid var(--card-border-color);
  border-radius: 4px;
}

.case-study__competitor-logo {
  height: 56px;
  width: auto;
  display: block;
  object-fit: contain;
  object-position: left center;
  filter: grayscale(1) invert(1);
}

.case-study__competitor-list {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
  list-style: disc;
}

.case-study__competitor-list li {
  font-family: var(--font-family-primary);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-card-date);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .case-study__competitor.col-span-4 {
    grid-column: span 12;
  }
}

/* ── Impact ── */
.case-study__impact {
  margin-bottom: var(--about-margin-block);
  padding-block: var(--about-margin-block);
  border-top: var(--card-border-width) solid var(--card-border-color);
}

.case-study__impact-body {
  margin-top: 16px;
  font-size: 2rem;
  line-height: 1.4;
}