/* Case-study page for "Interesting Engineering".
   Reuses the main site's design tokens, fonts and section/card
   conventions (style.css) — this file only adds the page-specific
   layout: hero mockup, feature grids, split sections and badges. */

/* ---------- HERO ---------- */
.ie-hero {
  background: var(--bg-dark);
  padding: 140px 0 100px;
  text-align: center;
}
.ie-eyebrow {
  color: var(--text-dark-2);
  font-size: 17px;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
}
.ie-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 85%;
  font-size: clamp(40px, 8vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--text-dark-1);
  margin: 0 0 24px;
}
.ie-desc {
  max-width: 700px;
  margin: 0 auto 64px;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.5;
  color: var(--text-dark-2);
}
.ie-hero-mockup {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 40px 80px rgba(0,0,0,.5);
}

/* ---------- ABOUT ---------- */
.ie-about-text {
  max-width: 720px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-light-2);
  margin: 0 0 28px;
}
.ie-role {
  font-size: 16px;
  margin: 0 0 24px;
}
.ie-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.ie-tag {
  padding: 8px 16px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light-1);
}

/* ---------- FEATURE / PRINCIPLE CARDS ---------- */
.ie-feature-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  align-items: stretch;
}
.ie-principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.ie-feature-card,
.ie-principle {
  background: #fafafa;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 24px;
}
.ie-feature-card {
  grid-column: span 2;
}
.ie-feature-card:nth-child(4) {
  grid-column: 2 / span 2;
}
.ie-feature-card:nth-child(5) {
  grid-column: 4 / span 2;
}
.ie-feature-card h3,
.ie-principle h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
.ie-feature-card p,
.ie-principle p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-light-2);
  margin: 0;
}

/* ---------- SPLIT SECTIONS (Desktop / Mobile experience) ---------- */
.ie-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ie-split--reverse .ie-split-text { order: 2; }
.ie-split--reverse .ie-split-image { order: 1; }
.ie-split-text p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-light-2);
  margin: 0 0 32px;
}
.section--dark .ie-split-text p { color: var(--text-dark-2); }
.ie-split-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
}
.ie-desktop-image {
  border-radius: 0;
  box-shadow: none;
}
.ie-mobile-image { box-shadow: none; }

.ie-cta-button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--text-light-1);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: transform .25s ease, background .25s ease;
}
.ie-cta-button:hover { transform: translateY(-2px); background: #2a2a2a; }

.ie-badges { display: flex; gap: 14px; flex-wrap: wrap; }
.ie-badges img { height: 44px; width: auto; display: block; }
.ie-badges a { transition: transform .25s ease; }
.ie-badges a:hover { transform: translateY(-2px); }

/* ---------- CAMPAIGNS ---------- */
.ie-campaigns-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.ie-campaign-card {
  display: block;
  background: #fafafa;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: box-shadow .3s ease, transform .3s ease;
}
.ie-campaign-card:hover { box-shadow: 0 16px 32px rgba(0,0,0,.1); transform: translateY(-4px); }
.ie-campaign-thumb {
  display: block;
  aspect-ratio: 4 / 3;
  background-size: cover;
  background-position: top center;
}
.ie-campaign-name {
  display: block;
  padding: 16px 20px 4px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.ie-campaign-link {
  display: block;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-light-2);
}

@media (max-width: 900px) {
  .ie-principles-grid,
  .ie-campaigns-grid {
    grid-template-columns: 1fr;
  }
  .ie-feature-grid {
    grid-template-columns: 1fr;
  }
  .ie-feature-card,
  .ie-feature-card:nth-child(4),
  .ie-feature-card:nth-child(5) {
    grid-column: auto;
  }
  .ie-split { grid-template-columns: 1fr; }
  .ie-split--reverse .ie-split-text { order: 1; }
  .ie-split--reverse .ie-split-image { order: 2; }
}
@media (max-width: 680px) {
  .ie-hero { padding: 110px 0 70px; }
}