/* ── Case Study — shared styles for all work pages ─────────── */

.cs-body {
  background-color: var(--color-off-white);
  color: var(--color-black);
}

/* ── Nav ──────────────────────────────────────────────────────── */
.cs-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--pad-h);
  z-index: 100;
  mix-blend-mode: difference; /* white text: visible on black, inverts to dark on light */
  font-family: var(--font-body);
  font-size: 15px;
}

.cs-nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--color-white);
  text-decoration: none;
  transition: opacity 0.2s ease;
  letter-spacing: -0.01em;
}

.cs-logo-hyphen {
  color: var(--color-orange);
}

.cs-nav-logo:hover {
  opacity: 0.7;
}

.cs-nav-cta {
  color: var(--color-white);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.cs-nav-cta:hover {
  opacity: 0.7;
}

/* ── Hero ─────────────────────────────────────────────────────── */
.cs-hero {
  padding-top: 100px;
  background-color: var(--color-black);
  color: var(--color-white);
}

.cs-hero-meta {
  display: flex;
  gap: var(--space-md);
  padding: 0 var(--pad-h) var(--space-sm);
}

.cs-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.55;
}

.cs-hero-title {
  font-family: var(--font-display);
  font-size: clamp(52px, 10vw, 140px);
  font-weight: 800;
  line-height: 0.88;
  padding: 0 var(--pad-h) var(--space-lg);
  color: var(--color-white);
}

.cs-hero-image {
  width: 100%;
  overflow: hidden;
}

.cs-hero-image img {
  width: 100%;
  height: 56vw;
  object-fit: cover;
  display: block;
}

/* ── Intro ────────────────────────────────────────────────────── */
.cs-intro {
  background-color: var(--color-white);
  padding: var(--space-xl) var(--pad-h);
  display: grid;
  gap: var(--space-lg);
}

.cs-lead {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.5vw, 48px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-black);
  max-width: 22ch;
}

.cs-logotype {
  max-width: 320px;
}

.cs-logotype img {
  width: 100%;
  height: auto;
}

/* ── Body copy ────────────────────────────────────────────────── */
.cs-body-copy {
  background-color: var(--color-off-white);
  padding: var(--space-xl) var(--pad-h);
}

.cs-body-inner {
  max-width: 64ch;
  display: flex;
  flex-direction: column;
  gap: 1.5em;
}

.cs-body-inner p {
  font-family: var(--font-body);
  font-size: clamp(17px, 1.6vw, 22px);
  line-height: 1.6;
  color: var(--color-black);
}

/* ── Gallery ──────────────────────────────────────────────────── */
.cs-gallery {
  background-color: var(--color-black);
  padding: var(--space-lg) var(--pad-h);
}

.cs-gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

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

.cs-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cs-gallery-item {
  overflow: hidden;
  background-color: #111;
}

/* ── CTA ──────────────────────────────────────────────────────── */
.cs-cta {
  background-color: var(--color-orange);
  padding: var(--space-xl) var(--pad-h);
}

.cs-cta-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-bottom: var(--space-sm);
}

.cs-cta-link {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 80px);
  font-weight: 800;
  line-height: 1;
  color: var(--color-black);
  text-decoration: none;
  display: inline-block;
  transition: transform 0.3s var(--ease-out);
}

.cs-cta-link:hover {
  transform: skewX(-3deg);
}

/* ── Footer nav ───────────────────────────────────────────────── */
.cs-footer-nav {
  background-color: var(--color-black);
  display: flex;
  justify-content: space-between;
  padding: var(--space-lg) var(--pad-h);
  font-family: var(--font-body);
  font-size: 16px;
}

.cs-footer-back,
.cs-footer-talk {
  color: var(--color-white);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.cs-footer-back:hover,
.cs-footer-talk:hover {
  opacity: 0.5;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (min-width: 768px) {
  .cs-nav {
    font-size: 18px;
    padding: 28px var(--pad-h);
  }

  .cs-hero {
    padding-top: 120px;
  }

  .cs-hero-image img {
    height: 46vw;
  }

  .cs-intro {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    padding: var(--space-xl) var(--pad-h);
  }

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

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