/* 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 {
  font-family: var(--font-hand);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 22px);
  color: var(--mint);
  transform: rotate(-3deg);
  display: inline-block;
  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: 820px;
  margin: 0 auto 32px;
  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;
}
.section--dark .ie-about-text { color: var(--text-dark-2); }
.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);
  white-space: nowrap;
}

/* ---------- FEATURE / PRINCIPLE CARDS ---------- */
.ie-feature-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  align-items: stretch;
}
.ie-feature-card {
  background: #fafafa;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 24px;
  grid-column: span 2;
}
.ie-feature-grid--5 .ie-feature-card:nth-child(4) {
  grid-column: 2 / span 2;
}
.ie-feature-grid--5 .ie-feature-card:nth-child(5) {
  grid-column: 4 / span 2;
}
.ie-feature-card h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
.ie-feature-card 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--offset { grid-template-columns: 1fr 380px; }
.ie-split--offset-left { grid-template-columns: 380px 1fr; }
.ie-split--auto-image { grid-template-columns: 1fr auto; }
.ie-split--auto-image-left { grid-template-columns: auto 1fr; }
.ie-phone-image {
  width: auto;
  height: 480px;
  max-width: 100%;
  max-height: 100%;
  display: block;
  box-shadow: none;
  border-radius: 0;
}
.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-sponsor-image { box-shadow: none; border-radius: 0; }

.ie-cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  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-cta-button--hero { background: var(--mint); color: #04263a; margin: 0 0 32px; }
.ie-cta-button--hero:hover { background: var(--mint-2); }

.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-extra-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.ie-extra-grid .ie-campaign-card {
  flex: 0 1 calc((100% - 40px) / 3);
  min-width: 220px;
}
.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: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 6px 20px 20px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--mint);
  color: #04263a;
  font-size: 13px;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease;
}
.ie-campaign-link svg { width: 12px; height: 12px; flex-shrink: 0; }
.ie-campaign-card:hover .ie-campaign-link { background: var(--mint-2); transform: translateY(-2px); }
.section--dark .ie-campaign-card { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.12); }
.section--dark .ie-campaign-name { color: var(--text-dark-1); }

/* ---------- NEXT PROJECT ---------- */
.ie-next-grid {
  display: grid;
  grid-template-columns: minmax(280px, 420px);
  gap: 20px;
}
.ie-next-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-next-card:hover { box-shadow: 0 16px 32px rgba(0,0,0,.1); transform: translateY(-4px); }
.ie-next-thumb { display: block; aspect-ratio: 4 / 3; background-size: cover; background-position: center; }
.ie-next-name { display: block; padding: 16px 20px 4px; font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.ie-next-link { display: block; padding: 0 20px 18px; font-size: 14px; color: var(--text-light-2); }

@media (max-width: 900px) {
  .ie-extra-grid .ie-campaign-card {
    flex: 1 1 100%;
  }
  .ie-feature-grid {
    grid-template-columns: 1fr;
  }
  .ie-feature-card,
  .ie-feature-grid--5 .ie-feature-card:nth-child(4),
  .ie-feature-grid--5 .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; }
  .ie-split--offset, .ie-split--offset-left, .ie-split--auto-image, .ie-split--auto-image-left, .ie-split--reverse { row-gap: 0; }
  .ie-badges { margin-bottom: 32px; }
  .ie-phone-image { height: 360px; margin: 0 auto; }
  .ie-split--auto-image-left .ie-split-text { order: 1; }
  .ie-split--auto-image-left .ie-phone-image { order: 2; height: 300px; }
  .ie-split--offset-left .ie-split-text { order: 1; }
  .ie-split--offset-left .ie-split-image { order: 2; }
  .ie-split-text .ie-cta-button { display: flex; width: fit-content; margin: 0 auto; }
  .ie-split--cta-gap { row-gap: 0; }
  .ie-split--cta-gap .ie-cta-button { margin-bottom: 32px; }
}
@media (max-width: 680px) {
  .ie-tags { justify-content: center; }
  .ie-hero { padding: 110px 0 70px; }
  .ie-badges { justify-content: center; }
}