/* Case-study page for "Editorial Thumbnail System".
   Reuses the main site's design tokens, fonts and section/card
   conventions (style.css) — this file only adds page-specific
   layout: hero band, challenge list, approach/impact cards,
   visual-system showcase and split sections. */

/* ---------- HERO ---------- */
.ets-hero {
  background: var(--bg-dark);
  padding: 140px 0 100px;
  text-align: center;
}
.ets-eyebrow {
  color: var(--text-dark-2);
  font-size: 17px;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
}
.ets-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 85%;
  font-size: clamp(36px, 6.6vw, 84px);
  line-height: 0.97;
  letter-spacing: -0.03em;
  color: var(--text-dark-1);
  margin: 0 0 20px;
}
.ets-subtitle {
  max-width: 680px;
  margin: 0 auto 20px;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.4;
  color: var(--text-dark-1);
  font-weight: 500;
}
.ets-desc {
  max-width: 700px;
  margin: 0 auto 48px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.6;
  color: var(--text-dark-2);
}
.ets-band {
  max-width: 1040px;
  width: 100%;
  margin: 0 auto;
  display: block;
}

/* ---------- COPY ---------- */
.ets-copy {
  max-width: 760px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-light-2);
}
.ets-copy p { margin: 0 0 20px; }
.ets-copy p:last-child { margin-bottom: 0; }
.ets-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 640px;
}
.ets-list li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-light-1);
}
.ets-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet);
}

/* ---------- CARD GRIDS ---------- */
.ets-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.ets-card {
  background: #fafafa;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 24px;
}
.ets-card h3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
.ets-card p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-light-2);
  margin: 0;
}

/* ---------- VISUAL SYSTEM SHOWCASE ---------- */
.ets-showcase {
  display: grid;
  gap: 20px;
  margin: 40px 0 32px;
}
.ets-showcase img {
  width: 100%;
  display: block;
}
.ets-content-types {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.ets-tag {
  padding: 8px 16px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light-1);
}

/* ---------- SPLIT (Content Adaptability) ---------- */
.ets-split {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 60px;
  align-items: center;
}
.ets-split img {
  width: 100%;
  display: block;
}
.ets-split-text p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-light-2);
  margin: 0 0 18px;
}
.ets-split-text p:last-child { margin-bottom: 0; }

/* ---------- CLOSING ---------- */
.ets-closing {
  text-align: center;
}
.ets-closing .ets-copy { margin: 0 auto; text-align: left; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .ets-card-grid { grid-template-columns: 1fr 1fr; }
  .ets-split { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 680px) {
  .ets-hero { padding: 110px 0 70px; }
  .ets-card-grid { grid-template-columns: 1fr; }
}