/* 導入事例ページの枠組み。カード本体の意匠は既存のまま維持しています。 */
.cases-page {
  overflow: hidden;
  background: var(--white);
}

.cases-hero {
  padding: 38px 20px 72px;
  background: #fff;
  text-align: center;
}

.cases-hero-label {
  display: inline-block;
  margin: 0 0 12px;
  padding: 0 12px 4px;
  border-bottom: 3px solid var(--red);
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.2;
}

.cases-hero h1 {
  margin: 0 0 16px;
  color: #252427;
  font-size: clamp(34px, 3.6vw, 46px);
  font-weight: 900;
  line-height: 1.35;
}

.cases-hero-lead,
.cases-hero-note {
  max-width: 760px;
  margin: 0 auto;
  color: #29282b;
  font-size: clamp(13px, 1.25vw, 16px);
  font-weight: 700;
  line-height: 1.8;
}

.cases-hero-note {
  margin-top: 12px;
}

.cases-filter {
  position: relative;
  z-index: 3;
  width: min(calc(100% - 40px), 1180px);
  margin: 0 auto;
  border: 1px solid #eceef1;
  border-radius: 16px;
  background: var(--white);
  box-shadow: 0 14px 36px rgba(25, 25, 25, .08);
}

.cases-filter-toggle {
  display: flex;
  width: 100%;
  min-height: 96px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 34px;
  border: 0;
  background: transparent;
  color: var(--black);
  text-align: left;
  cursor: pointer;
}
.cases-filter-toggle strong { display: block; margin: 0; font-size: clamp(22px, 2.4vw, 30px); line-height: 1.35; }
.cases-filter-toggle-icon {
  position: relative;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  border: 2px solid var(--red);
  border-radius: 50%;
}
.cases-filter-toggle-icon::before,
.cases-filter-toggle-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--red);
  transform: translate(-50%, -50%);
}
.cases-filter-toggle-icon::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .28s ease; }
.cases-filter.is-open .cases-filter-toggle-icon::after { transform: translate(-50%, -50%) rotate(0); }
.cases-filter-panel { display: grid; grid-template-rows: 1fr; opacity: 1; transition: grid-template-rows .28s ease, opacity .28s ease; }
.cases-filter-panel.is-collapsed { grid-template-rows: 0fr; opacity: 0; }
.cases-filter-panel-inner {
  min-height: 0;
  overflow: hidden;
  padding: 0 34px;
  transition: padding 0.28s ease;
}

.cases-filter-panel:not(.is-collapsed) .cases-filter-panel-inner {
  padding: 4px 34px 30px;
}

.filter-groups {
  display: grid;
  gap: 18px;
}

.filter-group {
  display: grid;
  gap: 10px;
}

.filter-group-title {
  color: var(--black);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-button {
  padding: 8px 14px;
  border: 0;
  border-radius: 999px;
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: background-color .2s ease, color .2s ease;
}

.filter-button:hover,
.filter-button:focus-visible {
  color: var(--red);
}

@media (hover: hover) and (pointer: fine) {
  .filter-button:not(.is-active):hover { color: var(--red); }
}

.filter-button.is-active,
.filter-button.is-active:hover,
.filter-button.is-active:focus-visible {
  background: var(--red);
  color: var(--white);
}
.cases-filter-reset {
  display: flex;
  min-width: 190px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin: 28px auto 0;
  padding: 8px 20px;
  border: 2px solid var(--red);
  border-radius: 999px;
  background: #fff;
  color: var(--red);
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
}
.cases-filter-reset:hover,
.cases-filter-reset:focus-visible { background: var(--red); color: #fff; }

.cases-list-section {
  padding: 0 0 110px;
  background: #fff;
}

.cases-list-inner {
  width: min(calc(100% - 40px), 1180px);
}

.case-grid {
  display: grid;
  margin-top: 48px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px 24px;
}

/* 既存カードの基本デザイン */
.case-card {
  display: flex;
  min-height: 430px;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid #eef0f2;
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 10px 28px rgba(25, 25, 25, .07);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.case-card:hover,
.case-card:focus-visible {
  border-color: rgba(211, 0, 4, .32);
  box-shadow: 0 16px 32px rgba(25, 25, 25, .11);
  outline: none;
  transform: translateY(-2px);
}

.case-visual {
  display: grid;
  flex: 0 0 136px;
  height: 136px;
  place-items: center;
  overflow: hidden;
  padding: 22px 26px;
  background: #fffdf7;
}

.case-visual img,
.case-visual .logo-image {
  width: auto;
  height: auto;
  max-width: 84%;
  max-height: 82px;
  object-fit: contain;
}

.logo-fallback {
  display: grid;
  width: 86px;
  height: 86px;
  place-items: center;
  border: 1px solid rgba(181, 42, 46, .18);
  border-radius: 50%;
  background: var(--white);
  color: #b52a2e;
  font-weight: 800;
  box-shadow: 0 10px 22px rgba(25, 25, 25, .06);
}

.logo-fallback span { font-size: 22px; line-height: 1; }

.case-card-body {
  display: flex;
  min-height: 0;
  flex: 1;
  flex-direction: column;
  padding: 20px 24px;
}

.case-card .label {
  display: -webkit-box;
  min-height: calc(1.45em * 2);
  margin-bottom: 10px;
  overflow: hidden;
  color: #b52a2e;
  font-size: 13px;
  font-weight: 900;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.case-card h3 {
  display: -webkit-box;
  min-height: calc(1.45em * 2);
  margin: 0 0 14px;
  overflow: hidden;
  color: var(--black);
  font-size: 20px;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.case-card p {
  display: -webkit-box;
  min-height: calc(1.7em * 2);
  margin: 0 0 14px;
  overflow: hidden;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 6px 12px; }
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0;
  color: var(--red-dark);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.5;
}
.detail-link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  margin-top: auto;
  padding-top: 16px;
  color: var(--red);
  font-size: 14px;
  font-weight: 900;
}
.detail-link::after { content: "→"; margin-left: 6px; }

.empty-state {
  margin: 48px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--black);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.8;
  text-align: center;
}
.empty-state span { color: var(--muted); font-size: 14px; font-weight: 600; }

.cases-cta { background: #fff; }

@media (max-width: 1180px) {
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 800px) {
  .cases-filter { width: calc(100% - 28px); }
  .cases-filter-toggle { min-height: 78px; padding: 16px 20px; }
  .cases-filter-toggle strong { font-size: 22px; }
  .cases-filter-panel-inner {
    padding: 0 20px;
  }

  .cases-filter-panel:not(.is-collapsed) .cases-filter-panel-inner {
    padding: 2px 20px 24px;
  }
  .cases-list-section { padding-bottom: 78px; }
  .cases-list-inner { width: calc(100% - 32px); }
  .case-grid { grid-template-columns: 1fr; gap: 20px; }
  .case-card { min-height: 420px; }
  .case-visual { flex-basis: 124px; height: 124px; }
  .case-visual img, .case-visual .logo-image { max-height: 74px; }
  .case-card-body { padding: 16px 20px; }
  .case-card h3 { font-size: 18px; }
  .case-card p { font-size: 13px; }
  .cases-filter-reset { width: 100%; }
}

@media (max-width: 480px) {
  .cases-list-inner { width: calc(100% - 28px); }
}

@media (prefers-reduced-motion: reduce) {
  .case-card { transition: none; }
  .cases-filter-panel,
  .cases-filter-toggle-icon::after { transition: none; }
}