/* ============================================
   CASE STUDY STYLES
   ============================================ */

.cs {
  padding-top: var(--nav-h);
}

/* ---- Hero ---- */
.cs-hero {
  background: var(--cs-color, #1B4F72);
  padding-bottom: 0;
}

.cs-hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--sp-16) var(--sp-8) var(--sp-16);
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--type-ui);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 236, 0.75);
  margin-bottom: var(--sp-12);
  transition: color 0.2s;
}
.cs-back:hover { color: rgba(244, 241, 236, 0.9); }
.cs-back svg   { flex-shrink: 0; }

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

.cs-tags {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.cs-tag {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(244, 241, 236, 0.75);
  border: 1px solid rgba(244, 241, 236, 0.3);
  padding: 4px 10px;
  border-radius: 100px;
  line-height: 1.4;
}

.cs-hero__year {
  font-size: 1rem;
  color: rgba(244, 241, 236, 0.75);
  font-weight: 300;
  margin-left: auto;
}

.cs-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6.5vw, 5.5rem);
  font-weight: 300;
  line-height: 0.97;
  letter-spacing: -0.025em;
  color: #F4F1EC;
  margin-bottom: var(--sp-3);
}

.cs-hero__client {
  font-size: var(--type-body);
  color: rgba(244, 241, 236, 0.75);
  font-weight: 300;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-12);
}

/* Stats bar */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
  border-top: 1px solid rgba(244, 241, 236, 0.1);
  padding-top: var(--sp-8);
}

.cs-stat {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.cs-stat__label {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(244, 241, 236, 0.75);
}

.cs-stat__value {
  font-size: var(--type-body);
  font-weight: 300;
  color: rgba(244, 241, 236, 0.85);
  line-height: 1.4;
}

/* ---- Body ---- */
.cs-body {
  background: var(--bg);
}

.cs-body__inner {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--sp-20) var(--sp-8);
}

/* Sections */
.cs-section {
  margin-bottom: var(--sp-20);
}

.cs-section__label {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--sp-4);
}

.cs-section__heading {
  font-family: var(--font-display);
  font-size: clamp(1.625rem, 2.8vw, 2.375rem);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: var(--sp-6);
}

.cs-section p {
  font-size: var(--type-body);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
}

.cs-section p + p {
  margin-top: var(--sp-4);
}

/* Highlighted quote block */
.cs-highlight {
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  padding: var(--sp-8) var(--sp-10);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: var(--sp-20);
}

.cs-quote {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.45;
}

/* Process steps */
.cs-process {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-8);
}

.cs-step {
  display: flex;
  gap: var(--sp-4);
  padding: var(--sp-6);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cs-step__num {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 300;
  color: var(--accent);
  opacity: 0.5;
  flex-shrink: 0;
  line-height: 1;
}

.cs-step strong {
  display: block;
  font-size: var(--type-subhead);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--sp-2);
  line-height: 1.3;
}

.cs-step p {
  font-size: var(--type-body);
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.65;
  margin: 0;
}

/* Outcome metrics */
.cs-outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-8);
}

.cs-outcome {
  padding: var(--sp-6);
  background: var(--bg-raised);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.cs-outcome__value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
}

.cs-outcome__label {
  font-size: var(--type-body);
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Reflection block */
.cs-reflection {
  font-family: var(--font-display);
  font-size: clamp(var(--type-body), 1.8vw, 1.375rem);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: var(--sp-8);
}

/* ---- Next case ---- */
.cs-next {
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.cs-next__link {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--sp-10) var(--sp-8);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  transition: background 0.25s;
}
.cs-next__link:hover { background: var(--accent-light); }

.cs-next__label {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.cs-next__title {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.5vw, 2.125rem);
  font-weight: 400;
  color: var(--text-primary);
  transition: color 0.2s;
  letter-spacing: -0.01em;
}
.cs-next__link:hover .cs-next__title { color: var(--accent); }

/* ---- Images ---- */
.cs-img-full {
  width: 100%;
  border-radius: var(--radius);
  display: block;
  margin: var(--sp-4) 0;
  cursor: zoom-in;
  transition: opacity 0.2s;
}
.cs-img-full:hover { opacity: 0.92; }

.cs-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin: var(--sp-6) 0;
}

.cs-img-grid img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  border: 1px solid var(--border);
  cursor: zoom-in;
  transition: opacity 0.2s;
}
.cs-img-grid img:hover { opacity: 0.9; }

.cs-img-frame img {
  cursor: zoom-in;
}

.cs-img-caption {
  font-size: var(--type-ui);
  color: var(--text-secondary);
  margin-top: var(--sp-2);
  font-style: italic;
  letter-spacing: 0.02em;
}

.cs-img-frame {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin: var(--sp-4) 0;
}

.cs-img-frame img {
  width: 100%;
  display: block;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .cs-stats {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-5);
  }

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

  .cs-body__inner {
    padding: var(--sp-12) var(--sp-5);
  }

  .cs-hero__inner {
    padding: var(--sp-10) var(--sp-5) var(--sp-10);
  }

  .cs-highlight { padding: var(--sp-6) var(--sp-6); }

  .cs-next__link {
    padding: var(--sp-8) var(--sp-5);
  }

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

  .cs-img-grid img {
    height: 220px;
  }
}