/* ============================================================
   Case study (事例ページ) — Legend of Stars sample
   Reuses tokens from styles.css; layout is its own.
   ============================================================ */

.case-main { padding-top: 72px; }

/* ── breadcrumb ── */
.case-crumb {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  color: var(--text-faint);
  padding: clamp(20px, 3vw, 32px) 0 0;
}
.case-crumb a { color: var(--text-faint); }
.case-crumb a:hover { color: var(--accent); }
.case-crumb-sep { opacity: 0.5; }

/* ── hero ── */
.case-hero { padding: clamp(28px, 4vw, 48px) 0 clamp(36px, 5vw, 60px); }
.case-cat {
  display: inline-block; font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 18px;
}
.case-title {
  font-size: clamp(30px, 4.4vw, 54px); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.18; text-wrap: pretty;
  max-width: 20em;
}
.case-lead {
  font-size: clamp(15px, 1.5vw, 18px); color: var(--text-dim);
  line-height: 1.85; margin-top: 22px; max-width: 40em; text-wrap: pretty;
}

/* ── stat band ── */
.case-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 3vw, 40px);
  margin-top: clamp(32px, 4vw, 48px);
  padding: clamp(24px, 3vw, 34px) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.case-stat-n {
  font-size: clamp(28px, 4vw, 46px); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1; color: var(--text);
}
.case-stat-n span { color: var(--accent); }
.case-stat-l {
  font-size: 12.5px; color: var(--text-dim); margin-top: 10px; line-height: 1.5;
}

/* ── video ── */
.case-video {
  margin: clamp(36px, 5vw, 60px) 0;
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: #000;
  aspect-ratio: 16 / 9;
  box-shadow: 0 40px 100px -50px rgba(0,0,0,0.7);
}
.case-video iframe { width: 100%; height: 100%; border: none; display: block; }

/* ── narrative blocks ── */
.case-body { max-width: 760px; margin: 0 auto; }
.case-block { padding: clamp(28px, 4vw, 48px) 0; border-top: 1px solid var(--border); }
.case-block:first-child { border-top: none; }
.case-block-k {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 14px;
}
.case-h {
  font-size: clamp(20px, 2.4vw, 28px); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.4; text-wrap: pretty;
  margin-bottom: 16px; max-width: 24em;
}
.case-p {
  font-size: clamp(15px, 1.4vw, 16px); color: var(--text-dim);
  line-height: 1.95; text-wrap: pretty; max-width: 42em;
}
.case-p + .case-p { margin-top: 16px; }

/* ── inline figure ── */
.case-figure { margin: clamp(24px, 3vw, 36px) 0 0; }
.case-figure img {
  width: 100%; height: auto; display: block;
  border-radius: 10px; border: 1px solid var(--border);
}
.case-figure figcaption {
  margin-top: 12px; font-size: 12.5px; color: var(--text-faint);
  line-height: 1.6; text-align: center;
}

/* ── meta list (used / deliverables) ── */
.case-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: clamp(18px, 2.4vw, 30px);
}
.case-meta-k {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 8px;
}
.case-meta-v { font-size: 14px; color: var(--text); line-height: 1.7; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.case-tag {
  font-size: 12px; color: var(--text-dim);
  padding: 5px 12px; border: 1px solid var(--border-2); border-radius: 999px;
}

/* ── CTA ── */
.case-cta {
  text-align: center; padding: clamp(48px, 7vw, 90px) 0;
  border-top: 1px solid var(--border); margin-top: clamp(36px, 5vw, 60px);
}
.case-cta-t {
  font-size: clamp(22px, 3vw, 34px); font-weight: 700;
  letter-spacing: -0.025em; text-wrap: pretty; max-width: 22em;
  margin: 0 auto 14px;
}
.case-cta-sub {
  font-size: 15px; color: var(--text-dim); line-height: 1.75;
  max-width: 36em; margin: 0 auto 30px;
}

/* ── back link / next ── */
.case-foot-nav {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  padding: clamp(28px, 3vw, 40px) 0; border-top: 1px solid var(--border);
}
.case-foot-nav a { color: var(--text-dim); font-size: 14px; }
.case-foot-nav a:hover { color: var(--accent); }
.case-foot-prevnext { display: flex; gap: 24px; }

/* ── other cases ── */
.case-others { padding: clamp(40px, 5vw, 64px) 0 0; border-top: 1px solid var(--border); margin-top: clamp(20px, 3vw, 36px); }
.case-others-head {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 24px;
}
.case-others-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 24px);
}
.case-other-card { display: block; }
.case-other-thumb {
  width: 100%; aspect-ratio: 16 / 9; object-fit: cover;
  border-radius: 10px; border: 1px solid var(--border);
  transition: border-color 0.3s var(--ease), transform 0.4s var(--ease);
}
.case-other-card:hover .case-other-thumb { border-color: var(--accent); transform: translateY(-3px); }
.case-other-cat {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent); margin: 14px 0 6px;
}
.case-other-t {
  font-size: 14.5px; font-weight: 600; line-height: 1.5;
  color: var(--text); letter-spacing: -0.01em; text-wrap: pretty;
}
.case-other-card:hover .case-other-t { color: var(--accent); }

/* ── simple footer ── */
.case-footer {
  border-top: 1px solid var(--border);
  padding: clamp(32px, 4vw, 48px) 0;
  font-size: 13px; color: var(--text-faint);
}
.case-footer .wrap {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
.case-footer a { color: var(--text-dim); }
.case-footer a:hover { color: var(--accent); }

@media (max-width: 760px) {
  .case-others-grid { grid-template-columns: 1fr; gap: 14px; }
}
@media (max-width: 640px) {
  .case-stats { grid-template-columns: 1fr; gap: 18px; text-align: left; }
}