/* ─── Case Study Page Background ────────────────────────────────────────── */
/* Overrides the main site's warm off-white with a slightly creamier paper    */
/* white for long-form reading. Blobs are hidden on case study pages.         */

body {
  background-color: #F9F7F2;
}

.page-blobs {
  display: none;
}

/* ─── Case Study Layout ──────────────────────────────────────────────────── */

.cs-main {
  padding-top: 100px;
  padding-bottom: var(--section-gap);
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-faint);
  margin-bottom: 48px;
  transition: color 0.2s, gap 0.25s var(--ease-out);
}

.cs-back span {
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
}

.cs-back:hover {
  color: var(--text);
  gap: 16px;
}

/* ─── Case Study Header ──────────────────────────────────────────────────── */

.cs-header {
  margin-bottom: 48px;
  max-width: 900px;
}

.cs-category {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 16px;
}

.cs-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5.5vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 20px;
}

.cs-subtitle {
  font-size: clamp(15px, 1.5vw, 18px);
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-faint);
  max-width: 680px;
}

/* ─── Cover Image ────────────────────────────────────────────────────────── */

.cs-cover {
  margin-bottom: clamp(64px, 10vw, 96px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.cs-cover-img {
  width: 100%;
  height: auto;
  display: block;
}

/* ─── Content Sections ───────────────────────────────────────────────────── */

.cs-section {
  padding-block: clamp(48px, 7vw, 80px);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
  overflow: visible;
}

.cs-section-label {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  padding-top: 5px;
  position: sticky;
  top: var(--cs-sticky-top, 120px);
  align-self: start;
  z-index: 1;
}

/* Case study body copy */
.cs-body p {
  font-size: clamp(15px, 1.4vw, 17px);
  font-weight: 300;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 18px;
}
.cs-body p:last-child {
  margin-bottom: 0;
}

.cs-placeholder {
  background: color-mix(in srgb, var(--lavender) 10%, transparent);
  border: 1.5px dashed color-mix(in srgb, var(--lavender) 60%, transparent);
  border-radius: var(--radius-md);
  padding: 48px 40px;
  min-height: 180px;
  display: flex;
  align-items: center;
}

.cs-placeholder p {
  font-size: 15px;
  font-weight: 400;
  color: var(--text-faint);
  font-style: italic;
}

.cs-colleague-quote {
  background: #E8DFFB;
  border-radius: var(--radius-lg);
  padding: 40px 44px 36px;
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.cs-colleague-quote::before {
  content: '\201C';
  font-family: var(--font-serif);
  font-size: 56px;
  line-height: 0.7;
  color: rgba(28, 28, 30, 0.15);
  display: block;
  margin-bottom: 12px;
}

.cs-colleague-quote-text {
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.5vw, 22px);
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--text);
}

.cs-colleague-quote-attr {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-top: 20px;
  border-top: 1px solid rgba(28, 28, 30, 0.1);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.cs-subsection-title {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-top: 48px;
  margin-bottom: 16px;
}
.cs-subsection-title:first-child { margin-top: 0; }

.cs-subsection-subtitle {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  margin-top: 32px;
  margin-bottom: 12px;
}

.cs-list {
  list-style: disc;
  padding-left: 20px;
  margin: 0 0 24px 0;
}

.cs-list li {
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-faint);
  margin-bottom: 8px;
}

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

.cs-img-placeholder {
  background: color-mix(in srgb, var(--lavender) 10%, transparent);
  border: 1.5px dashed color-mix(in srgb, var(--lavender) 50%, transparent);
  border-radius: var(--radius-md);
  padding: 48px 40px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-faint);
  font-style: italic;
  margin-block: 24px;
}

/* ─── Metadata Strip ─────────────────────────────────────────────────────── */

.cs-meta-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px 40px;
  padding-block: clamp(40px, 6vw, 56px);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: clamp(48px, 7vw, 80px);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.cs-meta-item--wide {
  grid-column: span 2;
}

.cs-meta-label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-meta-value {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-faint);
}

.cs-meta-value a {
  color: #8B5CF6;
  border-bottom: 1px solid currentColor;
  transition: opacity 0.2s;
}

.cs-meta-value a:hover { opacity: 0.6; }

/* ─── Metrics Grid ───────────────────────────────────────────────────────── */

.cs-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0px;
  margin-block: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.cs-metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 36px 20px;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.cs-metric-value {
  font-family: var(--font-sans);
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text);
}

.cs-metrics-grid--sm .cs-metric-value {
  font-size: 20px;
}

.cs-metric-label {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--text-faint);
  max-width: 140px;
}

/* ─── Pillar Cards ───────────────────────────────────────────────────────── */

.cs-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.cs-pillar {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
}

.cs-pillar--1 { border-top: 5px solid var(--lavender); }
.cs-pillar--2 { border-top: 5px solid var(--mint); }
.cs-pillar--3 { border-top: 5px solid var(--yellow); }

.cs-pillar-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* ─── Solution Section Components ───────────────────────────────────────── */

.cs-divider {
  border: none;
  border-top: 1px solid var(--text);
  margin-block: 56px;
}

.cs-subsection-label {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 80px;
  margin-bottom: 16px;
}

.cs-key-changes-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 12px;
  margin-top: 40px;
}

.cs-before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.cs-before,
.cs-after {
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.cs-before { background: #FBD8D8; }
.cs-after  { background: #D4F0E8; }

.cs-before h5,
.cs-after h5 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--text);
}

.cs-before ul,
.cs-after ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cs-before li,
.cs-after li {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text);
}

@media (max-width: 600px) {
  .cs-before-after {
    grid-template-columns: 1fr;
  }
}

/* ─── User Reviews Grid ──────────────────────────────────────────────────── */

.cs-reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.cs-review-card {
  border-radius: var(--radius-lg);
  padding: 32px 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.cs-review-card::before {
  content: '\201C';
  font-family: var(--font-serif);
  font-size: 40px;
  line-height: 0.7;
  color: rgba(28, 28, 30, 0.15);
  display: block;
  margin-bottom: 4px;
}

.cs-review-quote {
  font-family: var(--font-sans);
  font-size: clamp(14px, 1.3vw, 16px);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text);
  flex: 1;
}

.cs-review-source {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(28, 28, 30, 0.4);
  padding-top: 16px;
  border-top: 1px solid rgba(28, 28, 30, 0.08);
}

/* ─── Key Changes Table ──────────────────────────────────────────────────── */

.cs-key-changes-table {
  margin-top: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.cs-kc-row {
  display: grid;
  grid-template-columns: 1fr 32px 1fr;
  align-items: start;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}

.cs-kc-row:last-child {
  border-bottom: 1px solid var(--border);
}

.cs-kc-before {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-faint);
  padding-right: 12px;
}

.cs-kc-arrow {
  font-size: 13px;
  color: var(--text-faint);
  display: flex;
  justify-content: center;
  padding-top: 2px;
}

.cs-kc-after {
  padding-left: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cs-kc-after-text {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
}

.cs-kc-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: color-mix(in srgb, var(--lavender) 22%, transparent);
  color: #5840b0;
  border-radius: 4px;
  padding: 2px 8px;
  align-self: flex-start;
}

@media (max-width: 600px) {
  .cs-kc-row {
    grid-template-columns: 1fr;
  }
  .cs-kc-arrow { display: none; }
  .cs-kc-before {
    padding-right: 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
  }
  .cs-kc-after { padding-left: 0; }
}

/* ─── WCAG Badges ────────────────────────────────────────────────────────── */

.wcag-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  border-radius: 100px;
  padding: 3px 10px;
  line-height: 1.6;
}

.wcag-badge--perceivable    { background: #FDDEDE; color: #A82020; }
.wcag-badge--operable       { background: #D4F0EB; color: #1A7060; }
.wcag-badge--understandable { background: #E2E2E2; color: #3A3A3A; }
.wcag-badge--robust         { background: #E8EDCF; color: #4A5E1C; }

/* ─── Design Outcome Items ───────────────────────────────────────────────── */

.cs-outcomes {
  margin-top: 24px;
}

.cs-outcome-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.cs-outcome-item:first-child { padding-top: 0; }
.cs-outcome-item:last-child  { border-bottom: none; padding-bottom: 0; }

.cs-outcome-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.cs-outcome-title {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-right: 4px;
}

.cs-outcome-item .cs-list:last-child { margin-bottom: 0; }

/* ─── Before / After Image Pair ──────────────────────────────────────────── */

.cs-img-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-block: 24px;
}

.cs-img-pair-slot {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-img-pair-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cs-img-pair-slot--before .cs-img-pair-label { color: #A82020; }
.cs-img-pair-slot--after  .cs-img-pair-label { color: #1A7060; }

.cs-img-pair-slot .cs-img-placeholder { margin-block: 0; flex: 1; }

@media (max-width: 600px) {
  .cs-img-pair { grid-template-columns: 1fr; }
}

/* ─── Bottom Nav ─────────────────────────────────────────────────────────── */

.cs-footer-nav {
  padding-top: clamp(48px, 7vw, 80px);
  border-top: 1px solid var(--border);
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .cs-meta-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-meta-item--wide {
    grid-column: span 2;
  }

  .cs-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-pillars {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .cs-section {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .cs-section-label {
    position: static;
  }

  .cs-meta-strip {
    grid-template-columns: 1fr 1fr;
  }

  .cs-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Case Study Top Nav ─────────────────────────────────────────────────── */

.cs-topnav {
  position: sticky;
  top: 88px;
  z-index: 90;
  background: color-mix(in srgb, var(--lavender) 10%, var(--bg));
  border-bottom: 1px solid color-mix(in srgb, var(--lavender) 25%, var(--border));
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.cs-topnav.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.cs-topnav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 5vw, 48px);
  display: flex;
  justify-content: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.cs-topnav-inner::-webkit-scrollbar { display: none; }

.cs-topnav-tab {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: color-mix(in srgb, var(--text) 60%, transparent);
  padding: 12px 14px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.cs-topnav-tab:hover {
  color: var(--text);
}

.cs-topnav-tab.is-active {
  color: var(--text);
  border-bottom-color: var(--lavender);
}

@media (max-width: 768px) {
  .cs-topnav { display: none; }
}