/* ============================================================
   CASE STUDY DETAIL PAGE
   New, page-specific components only. Everything scoped under
   .case-study so nothing here can leak into the rest of the site.
   Reuses existing design tokens (colour, type, spacing, radius,
   shadow) from styles.css - see the summary in the PR/handoff
   notes for the full list of reused vs new classes.
   ============================================================ */

.case-study .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.case-study .page-hero { padding-bottom: 40px; }

.case-study-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-2xs);
  letter-spacing: 0.02em;
  color: var(--accent-600);
  background: var(--accent-100);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
}
.case-study-hero-eyebrow .dot { opacity: 0.5; }

.case-study-hero-outcome {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-2);
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: var(--ink-800);
  max-width: 640px;
}

/* ---- Two-column body: ~65/35, single column below 1024px ---- */
.case-study-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding: var(--section-py) var(--section-px);
  max-width: var(--container);
  margin: 0 auto;
  align-items: start;
}
.case-study-main { grid-column: 1; order: 2; min-width: 0; }
.case-study-aside { grid-column: 1; order: 1; min-width: 0; display: flex; flex-direction: column; gap: 24px; }

@media (min-width: 1024px) {
  .case-study-body { grid-template-columns: 1.85fr 1fr; gap: 56px; }
  .case-study-main { order: 1; }
  .case-study-aside { order: 2; position: sticky; top: 100px; align-self: start; }
}

.case-study-section { margin-bottom: 56px; }
.case-study-section:last-child { margin-bottom: 0; }
.case-study-section-title {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  color: var(--ink-800);
  margin-bottom: 16px;
}
.case-study-section .page-section-body { max-width: none; }
.case-study .page-list { margin-top: 20px; }

/* ---- Solution & Approach: four labelled subsections ---- */
.case-study-subsection { margin-top: 32px; }
.case-study-subsection-title {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-md);
  color: var(--ink-800);
  margin-bottom: 10px;
}
.case-study-subsection-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-study-subsection-list li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--slate-500);
}
.case-study-subsection-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-500);
}

/* ---- Architecture diagram: figure, caption, download, zoom ---- */
.case-study-diagram-figure { margin: 0; }
.case-study-diagram-frame {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  cursor: zoom-in;
  transition: box-shadow 200ms ease, transform 200ms ease;
}
.case-study-diagram-frame:hover,
.case-study-diagram-frame:focus-visible {
  box-shadow: var(--shadow-3);
  transform: translateY(-2px);
}
.case-study-diagram-frame:focus-visible { outline: 3px solid var(--accent-400); outline-offset: 2px; }
.case-study-diagram-frame img { display: block; width: 100%; height: auto; aspect-ratio: 1400 / 620; object-fit: contain; }
.case-study-diagram-hint {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-3xs);
  color: var(--text-muted);
  background: var(--surface-sunken);
  border-top: 1px solid var(--border-subtle);
}
.case-study-diagram-figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  color: var(--slate-500);
}
.case-study-diagram-download {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-xs);
  color: var(--accent-600);
  text-decoration: none;
  white-space: nowrap;
}
.case-study-diagram-download:hover { text-decoration: underline; }

/* ---- Zoom overlay ---- */
.case-study-zoom-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(5,26,36,0.82);
}
.case-study-zoom-overlay.is-open { display: flex; }
.case-study-zoom-dialog {
  position: relative;
  width: 100%;
  max-width: 1200px;
  max-height: 90vh;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow: auto;
  box-shadow: var(--shadow-3);
}
.case-study-zoom-dialog img { display: block; width: 100%; height: auto; aspect-ratio: 1400 / 620; object-fit: contain; }
.case-study-zoom-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: var(--surface-sunken);
  color: var(--ink-800);
  cursor: pointer;
  transition: background 150ms ease;
}
.case-study-zoom-close:hover { background: var(--border-subtle); }
.case-study-zoom-close:focus-visible,
.case-study-diagram-download:focus-visible,
.case-study-glance-cta:focus-visible,
.case-study-cta-submit:focus-visible,
.case-study-cta-input:focus-visible,
.case-study-related-card:focus-visible {
  outline: 3px solid var(--accent-400);
  outline-offset: 2px;
}

/* ---- "At a glance" card ---- */
.case-study-glance-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  padding: 28px;
}
.case-study-glance-heading {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.case-study-glance-list { list-style: none; margin: 0; padding: 0; }
.case-study-glance-list > li {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border-subtle);
}
.case-study-glance-list > li:first-child { border-top: none; padding-top: 0; }
.case-study-glance-label {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-2xs);
  color: var(--text-muted);
}
.case-study-glance-value {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-xs);
  color: var(--ink-800);
  line-height: 1.4;
}
.case-study-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}
.case-study-chip {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-3xs);
  color: var(--ink-800);
  background: var(--surface-sunken);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
}

/* ---- Inline CTA card (email capture) ---- */
.case-study-cta-card {
  background: var(--surface-inverse);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: var(--text-on-inverse);
}
.case-study-cta-heading {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-md);
  color: var(--text-on-inverse);
  margin-bottom: 8px;
}
.case-study-cta-copy {
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-xs);
  line-height: 1.55;
  color: var(--text-on-inverse-secondary);
  margin-bottom: 18px;
}
.case-study-cta-form { display: flex; flex-direction: column; gap: 10px; }
.case-study-cta-input {
  width: 100%;
  border: 1px solid var(--border-inverse);
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-xs);
  color: var(--text-on-inverse);
}
.case-study-cta-input::placeholder { color: rgba(255,255,255,0.5); }
.case-study-cta-input:focus { outline: none; border-color: var(--accent-400); }
.case-study-cta-submit {
  background: var(--accent-500);
  color: var(--white);
  font-family: var(--font-sans);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-xs);
  border: none;
  border-radius: var(--radius-btn);
  padding: 12px 20px;
  cursor: pointer;
  transition: background 150ms ease, box-shadow 200ms ease, transform 150ms ease;
}
.case-study-cta-submit:hover {
  background: var(--accent-600);
  box-shadow: 0 6px 16px rgba(5,26,36,0.25);
  transform: translateY(-2px);
}

/* ---- Outcomes: metric tiles ---- */
.case-study-outcomes { padding: var(--section-py) var(--section-px); background: var(--surface-sunken); }
.case-study-outcomes-inner { max-width: var(--container); margin: 0 auto; }

.case-study-results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 40px;
}
@media (min-width: 640px) {
  .case-study-results-grid { grid-template-columns: repeat(3, 1fr); }
}
.case-study-result-tile {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  padding: 28px;
  text-align: center;
}
.case-study-result-metric {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-display);
  color: var(--accent-500);
  line-height: 1;
}
.case-study-result-label {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: var(--ink-800);
  margin-top: 10px;
}
.case-study-result-before-after {
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-2xs);
  color: var(--text-muted);
  margin-top: 6px;
}

.case-study-outcome-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  max-width: 880px;
}
@media (min-width: 768px) { .case-study-outcome-list { grid-template-columns: repeat(2, 1fr); } }
.case-study-outcome-list li {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--ink-800);
}
.case-study-outcome-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-500);
}

/* ---- Client quote ---- */
.case-study-quote-section {
  padding: var(--section-py) var(--section-px);
  text-align: center;
}
.case-study-quote {
  max-width: 780px;
  margin: 0 auto;
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-h3);
  line-height: 1.4;
  color: var(--ink-800);
}
.case-study-quote-cite {
  display: block;
  margin-top: 20px;
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-style: normal;
}

/* ---- Related case studies ---- */
.case-study-related {
  padding: var(--section-py) var(--section-px);
  background: var(--surface-sunken);
}
.case-study-related-inner { max-width: var(--container); margin: 0 auto; }
.case-study-related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
}
@media (min-width: 768px) { .case-study-related-grid { grid-template-columns: repeat(3, 1fr); } }

.case-study-related-card {
  display: block;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 200ms ease, transform 200ms ease;
}
.case-study-related-card:hover { box-shadow: var(--shadow-3); transform: translateY(-2px); }
.case-study-related-thumb {
  height: 160px;
  background-size: cover;
  background-position: center;
}
.case-study-related-body { padding: 22px; }
.case-study-related-title {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-md);
  line-height: 1.3;
  color: var(--ink-800);
  margin-top: 10px;
  margin-bottom: 14px;
}
.case-study-related-stats { display: flex; gap: 20px; }
.case-study-related-stat-value {
  display: block;
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--fs-md);
  color: var(--accent-500);
}
.case-study-related-stat-label {
  display: block;
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-3xs);
  color: var(--text-muted);
  margin-top: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .case-study-diagram-frame,
  .case-study-cta-submit,
  .case-study-related-card {
    transition: none;
  }
}