:root {
  --v15-ink: #092f3d;
  --v15-muted: #5e747d;
  --v15-line: rgba(9, 47, 61, 0.14);
  --v15-soft: #eef6f6;
  --v15-accent: #0f8baa;
  --v15-warm: #f3eee6;
}

.v15-eyebrow {
  margin: 0 0 12px;
  color: var(--v15-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.v15-lead {
  max-width: 62rem;
  color: var(--v15-muted);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.8;
}

.v15-section {
  padding: clamp(54px, 7vw, 92px) 0;
}

.v15-section + .v15-section {
  border-top: 1px solid var(--v15-line);
}

.v15-section-tint { background: var(--v15-soft); }
.v15-section-warm { background: var(--v15-warm); }

.v15-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(300px, 1.28fr);
  gap: clamp(24px, 5vw, 80px);
  margin-bottom: clamp(30px, 4vw, 54px);
  align-items: start;
}

.v15-heading h2 {
  margin: 0;
  color: var(--v15-ink);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.v15-heading p {
  margin: 0;
  color: var(--v15-muted);
  line-height: 1.9;
}

.v15-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--v15-line);
  border-left: 1px solid var(--v15-line);
}

.v15-card {
  min-height: 156px;
  padding: clamp(24px, 3vw, 40px);
  border-right: 1px solid var(--v15-line);
  border-bottom: 1px solid var(--v15-line);
  background: rgba(255,255,255,0.68);
}

.v15-card h3,
.v15-card strong {
  display: block;
  margin: 0 0 10px;
  color: var(--v15-ink);
  font-size: 1.1rem;
  line-height: 1.45;
}

.v15-card p,
.v15-card li {
  color: var(--v15-muted);
  line-height: 1.75;
}

.v15-card p:last-child { margin-bottom: 0; }
.v15-card ul { margin: 0; padding-left: 1.2em; }
.v15-card li + li { margin-top: 8px; }

.v15-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: v15-step;
  border-top: 1px solid var(--v15-line);
}

.v15-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--v15-line);
  color: var(--v15-muted);
  line-height: 1.75;
  counter-increment: v15-step;
}

.v15-list li::before {
  content: counter(v15-step, decimal-leading-zero);
  color: var(--v15-accent);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.v15-case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.v15-case-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  color: inherit;
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--v15-line);
  transition: transform .2s ease, box-shadow .2s ease;
}

.v15-case-card:hover,
.v15-case-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 18px 45px rgba(9,47,61,.12);
}

.v15-case-card img {
  display: block;
  width: 100%;
  height: clamp(190px, 18vw, 280px);
  object-fit: cover;
  object-position: center;
  background: var(--v15-soft);
}

.v15-case-card span {
  padding: 18px 20px 22px;
  color: var(--v15-ink);
  font-weight: 700;
  line-height: 1.5;
}

.migration-card-media:not(:has(img)) {
  min-height: 92px;
  aspect-ratio: auto;
  padding: 18px;
  background: linear-gradient(135deg, #edf3f3, #dcebed);
}

.migration-card-placeholder {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: var(--v15-muted);
  font-size: .78rem;
  letter-spacing: .04em;
}

.v15-faq {
  border-top: 1px solid var(--v15-line);
}

.v15-faq details {
  border-bottom: 1px solid var(--v15-line);
}

.v15-faq summary {
  padding: 24px 44px 24px 0;
  color: var(--v15-ink);
  font-size: 1.08rem;
  font-weight: 700;
  cursor: pointer;
}

.v15-faq p {
  max-width: 64rem;
  margin: 0 0 26px;
  color: var(--v15-muted);
  line-height: 1.9;
}

.v15-related-link {
  display: inline-flex;
  margin: 0 0 26px;
  color: var(--v15-accent);
  font-weight: 700;
}

.v15-directory-empty {
  grid-column: 1 / -1;
  padding: clamp(24px, 3vw, 40px);
  border: 1px solid var(--v15-line);
  background: #fff;
}

.v15-directory-empty > small,
.v15-directory-next small {
  display: block;
  margin-bottom: 10px;
  color: var(--v15-accent);
  font-weight: 700;
  letter-spacing: .08em;
}

.v15-directory-empty > strong,
.v15-directory-next strong {
  display: block;
  color: var(--v15-ink);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  line-height: 1.35;
}

.v15-directory-empty > p {
  max-width: 52rem;
  margin: 16px 0 24px;
  color: var(--v15-muted);
  line-height: 1.8;
}

.v15-directory-empty-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.migration-news-list .v15-directory-empty-actions a.button {
  display: inline-flex;
  min-height: 50px;
  padding: 12px 21px;
  border: 1px solid var(--v15-ink);
}

.migration-news-list .v15-directory-empty-actions a.button-primary {
  background: var(--v15-ink);
  color: #fff;
}

.migration-news-list .v15-directory-empty-actions a.button-outline {
  background: #fff;
  color: var(--v15-ink);
}

.v15-directory-next {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  border: 1px solid var(--v15-line);
  background: var(--v15-line);
}

.v15-directory-next > a {
  min-height: 160px;
  padding: clamp(20px, 3vw, 36px);
  background: #fff;
  text-decoration: none;
}

.v15-boundary {
  padding: clamp(28px, 4vw, 48px);
  border-left: 4px solid var(--v15-accent);
  background: var(--v15-ink);
  color: rgba(255,255,255,.78);
}

.v15-boundary h2,
.v15-boundary h3 { color: #fff; }
.v15-boundary li { line-height: 1.8; }

.v15-record-meta,
.v15-standard-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--v15-line);
  border-left: 1px solid var(--v15-line);
}

.v15-record-meta > div,
.v15-standard-meta > div {
  padding: 20px 24px;
  border-right: 1px solid var(--v15-line);
  border-bottom: 1px solid var(--v15-line);
}

.v15-record-meta dt,
.v15-standard-meta dt {
  color: var(--v15-muted);
  font-size: .82rem;
}

.v15-record-meta dd,
.v15-standard-meta dd {
  margin: 8px 0 0;
  color: var(--v15-ink);
  font-weight: 700;
  line-height: 1.55;
}

.v15-status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 11px;
  border-radius: 999px;
  background: #dcecef;
  color: var(--v15-ink);
  font-size: .78rem;
  font-weight: 700;
}

.v15-disclosure {
  margin-top: 28px;
  padding: 20px 24px;
  border: 1px solid var(--v15-line);
  color: var(--v15-muted);
  line-height: 1.75;
  background: rgba(255,255,255,.72);
}

.v15-source-link {
  color: var(--v15-accent);
  text-underline-offset: .2em;
}

@media (max-width: 760px) {
  .v15-heading { grid-template-columns: 1fr; gap: 18px; }
  .v15-grid,
  .v15-record-meta,
  .v15-standard-meta { grid-template-columns: 1fr; }
  .v15-case-grid { grid-template-columns: 1fr; }
  .v15-directory-next { grid-template-columns: 1fr; }
  .v15-card { min-height: 0; }
  .v15-list li { grid-template-columns: 48px minmax(0,1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .v15-case-card { transition: none; }
}