/* ============================================================
   CASE archive page — extends shared chassis (service.css)
   Aesthetic: V2 ─ Editorial Modern
   ============================================================ */

/* ----- Hero (simple) ----- */
.case-hero {
  background: var(--white);
  padding: 200px 0 100px;
  border-bottom: 1px solid var(--ink-200);
  position: relative;
}
.case-hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 6px;
  background: var(--is-orange);
}
.case-breadcrumb {
  font-family: var(--font-latin);
  font-size: 12px; letter-spacing: 0.2em;
  color: var(--ink-500);
  text-transform: uppercase;
  margin-bottom: 56px;
  display: flex; align-items: center; gap: 14px;
}
.case-breadcrumb a { color: var(--ink-500); text-decoration: none; transition: color 200ms; }
.case-breadcrumb a:hover { color: var(--is-orange); }
.case-breadcrumb .sep { color: var(--ink-300); }

.case-hero-eyebrow {
  font-family: var(--font-latin);
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--is-orange);
  text-transform: uppercase;
  padding-top: 24px;
  border-top: 2px solid var(--is-orange);
  display: inline-block;
  margin-bottom: 32px;
}
.case-hero-title {
  font-family: var(--font-jp);
  font-size: clamp(56px, 8vw, 120px);
  font-weight: 900; letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0 0 32px 0;
  color: var(--is-navy);
}
.case-hero-lede {
  font-family: var(--font-jp);
  font-size: 18px; line-height: 1.9;
  color: var(--ink-700);
  max-width: 720px;
  margin: 0;
}

/* ----- Filter ----- */
.case-filter-wrap {
  background: var(--paper);
  border-bottom: 1px solid var(--ink-200);
  padding: 28px 0;
  position: sticky;
  top: 64px;
  z-index: 50;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(250, 250, 251, 0.92);
}
.case-filter {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
}
.case-filter-label {
  font-family: var(--font-latin);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--ink-500);
  text-transform: uppercase;
  margin-right: 16px;
}
.case-filter-btn {
  font-family: var(--font-jp);
  font-size: 14px; font-weight: 600;
  letter-spacing: -0.01em;
  padding: 10px 20px;
  background: var(--white);
  border: 1px solid var(--ink-300);
  color: var(--is-navy-2);
  cursor: pointer;
  transition: all 180ms ease;
  display: inline-flex; align-items: center; gap: 8px;
}
.case-filter-btn:hover {
  border-color: var(--is-navy);
  color: var(--is-navy);
}
.case-filter-btn.is-active {
  background: var(--is-navy);
  border-color: var(--is-navy);
  color: var(--white);
}
.case-filter-btn .count {
  font-family: var(--font-latin);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-500);
}
.case-filter-btn.is-active .count {
  color: rgba(255,255,255,0.6);
}

/* ----- Grid ----- */
.case-grid-section {
  background: var(--paper);
  padding: 80px 0 160px;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.case-card {
  display: flex; flex-direction: column;
  background: var(--white);
  border: 1px solid var(--ink-200);
  text-decoration: none;
  color: inherit;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
  position: relative;
  overflow: hidden;
}
.case-card:hover {
  border-color: var(--is-navy);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(6, 14, 41, 0.10);
}
.case-card-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 32px;
  border-bottom: 1px solid var(--ink-200);
  background: var(--paper);
}
.case-card-num {
  font-family: var(--font-latin);
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--ink-500);
}
.case-card-cat {
  font-family: var(--font-jp);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.05em;
  padding: 5px 10px;
  border: 1px solid var(--is-orange);
  color: var(--is-orange);
  background: var(--white);
}
.case-card[data-cat="bpo"] .case-card-cat {
  border-color: var(--is-navy);
  color: var(--is-navy);
}
.case-card-body {
  padding: 32px;
  display: flex; flex-direction: column; gap: 18px;
  flex: 1;
}
.case-card-co {
  font-family: var(--font-jp);
  font-size: 22px; font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--is-navy);
  margin: 0;
}
.case-card-industry {
  font-family: var(--font-latin);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--ink-500);
  text-transform: uppercase;
  margin-top: -10px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink-200);
}
.case-card-desc {
  font-family: var(--font-jp);
  font-size: 14.5px; line-height: 1.85;
  color: var(--is-navy-2);
  margin: 0;
  text-wrap: pretty;
  flex: 1;
}
.case-card-result {
  margin-top: 12px;
  padding: 20px 24px;
  background: var(--is-navy);
  color: var(--white);
  display: flex; flex-direction: column; gap: 6px;
}
.case-card-result-label {
  font-family: var(--font-latin);
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--is-yellow);
  text-transform: uppercase;
}
.case-card-result-val {
  font-family: var(--font-jp);
  font-size: 17px; font-weight: 800;
  line-height: 1.5;
  color: var(--white);
  letter-spacing: -0.01em;
}
.case-card-result-val em {
  font-style: normal;
  color: var(--is-yellow);
}
.case-card-foot {
  padding: 18px 32px;
  border-top: 1px solid var(--ink-200);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-latin);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-500);
  font-weight: 700;
  transition: all 220ms ease;
}
.case-card:hover .case-card-foot {
  background: var(--is-orange);
  color: var(--white);
  border-top-color: var(--is-orange);
}
.case-card-foot-arrow {
  font-family: var(--font-latin);
  font-size: 14px;
  transition: transform 220ms ease;
}
.case-card:hover .case-card-foot-arrow {
  transform: translateX(4px);
}

.case-hidden { display: none !important; }

/* Empty state */
.case-empty {
  display: none;
  padding: 80px 0;
  text-align: center;
  font-family: var(--font-jp);
  color: var(--ink-500);
  font-size: 16px;
}
.case-empty.is-shown { display: block; }

/* ----- Mobile ----- */
@media (max-width: 1024px) {
  .case-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 768px) {
  .case-hero { padding: 140px 0 60px; }
  .case-breadcrumb { margin-bottom: 32px; font-size: 11px; }
  .case-hero-title { font-size: 48px; }
  .case-hero-lede { font-size: 15px; line-height: 1.85; }

  .case-filter-wrap { padding: 16px 0; top: 56px; }
  .case-filter-label { display: none; }
  .case-filter { gap: 6px; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .case-filter-btn { font-size: 13px; padding: 8px 14px; white-space: nowrap; flex-shrink: 0; }

  .case-grid-section { padding: 40px 0 80px; }
  .case-card-head { padding: 18px 24px; }
  .case-card-body { padding: 24px; gap: 14px; }
  .case-card-co { font-size: 18px; }
  .case-card-result { padding: 16px 20px; }
  .case-card-result-val { font-size: 15px; }
  .case-card-foot { padding: 14px 24px; font-size: 10px; }
}