.case-archive { padding: var(--section-space-top) 24px 85px; background: #d9d9d2; color: #222; }
.case-archive__inner { max-width: var(--container-max); margin: 0 auto; }
.case-archive .section-eyebrow__en { color: #286f57; }
.case-archive__title { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

.case-filter { margin-top: var(--section-title-gap); }
.case-filter__summary { width: fit-content; min-height: 46px; padding: 0 18px; display: flex; align-items: center; gap: 22px; list-style: none; background: #2f765e; color: #fff; font-size: 13px; font-weight: 700; cursor: pointer; }
.case-filter__summary::-webkit-details-marker { display: none; }
.case-filter__toggle { position: relative; width: 14px; height: 14px; }
.case-filter__toggle::before, .case-filter__toggle::after { content: ""; position: absolute; top: 50%; left: 0; width: 14px; height: 1px; background: currentColor; transition: transform .2s ease; }
.case-filter__toggle::after { transform: rotate(90deg); }
.case-filter[open] .case-filter__toggle::after { transform: rotate(0); }
.case-filter__body { padding: 22px 40px 30px; background: #fff; }
.case-filter__body { transform-origin: top; }
.case-filter__keyword { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 4px 0 18px; border-bottom: 1px solid #e8e8e5; }
.case-filter__keyword > label { padding-top: 13px; font-size: 13px; font-weight: 700; }
.case-filter__keyword-control { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.case-filter__keyword input { width: 100%; min-height: 46px; padding: 10px 15px; border: 1px solid #b9b9b9; border-radius: 6px; background: #fff; color: #2b2b2b; font: inherit; }
.case-filter__keyword input:focus { border-color: #2f765e; outline: 2px solid rgb(47 118 94 / 20%); outline-offset: 1px; }
.case-filter__keyword-control button { min-width: 84px; padding: 8px 18px; border: 0; border-radius: 6px; background: #2f765e; color: #fff; font-weight: 700; }
.case-filter__group { display: grid; grid-template-columns: 110px 1fr; gap: 18px; margin: 0; padding: 18px 0; border: 0; border-bottom: 1px solid #e8e8e5; }
.case-filter__group legend { float: left; width: 110px; padding: 7px 0 0; font-size: 13px; font-weight: 700; }
.case-filter__options { grid-column: 2; display: flex; flex-wrap: wrap; gap: 9px; }
.filter-chip { cursor: pointer; }
.filter-chip input { position: absolute; opacity: 0; pointer-events: none; }
.filter-chip span { min-height: 36px; padding: 5px 15px; display: inline-flex; align-items: center; border: 1px solid #b9b9b9; border-radius: 999px; color: #5E5E5E; background: #fff; font-size: 12px; transition: .15s ease; }
.filter-chip input:checked + span { border-color: #2B2B2B; background: #2B2B2B; color: #fff; }
.filter-chip input:focus-visible + span { outline: 2px solid #2f765e; outline-offset: 2px; }
.case-filter__footer { display: flex; align-items: center; justify-content: center; gap: 28px; padding-top: 28px; }
.case-filter__footer p { margin: 0; font-size: 13px; font-weight: 700; }
.case-filter__footer p strong { margin: 0 4px 0 8px; color: #2f765e; font-size: 30px; }
.case-filter__footer button[type="submit"] { min-width: 230px; min-height: 54px; padding: 10px 24px; border: 0; border-radius: 999px; background: #242424; color: #fff; font-weight: 700; }
.case-filter__footer button[type="submit"]:disabled { cursor: not-allowed; background: #aaa; color: #eee; }
.case-filter__reset { min-height: 44px; color: #666; font-size: 12px; text-decoration: underline; text-underline-offset: 4px; }

.case-archive__status { margin: 46px 0 18px; color: #555; font-size: 13px; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px 18px; scroll-margin-top: 160px; }
.case-card[hidden] { display: none; }
.case-card { min-width: 0; overflow: hidden; border-radius: 14px; background: #fff; box-shadow: 0 8px 22px rgba(20,28,24,.06); transition: transform .2s ease, box-shadow .2s ease; }
.case-card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(20,28,24,.12); }
.case-card > a { display: flex; flex-direction: column; height: 100%; }
.case-card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.case-card__media img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .4s ease; }
.case-card:hover .case-card__media img { transform: scale(1.025); }
.case-card__media time { position: absolute; top: 0; left: 0; min-width: 112px; padding: 7px 14px; border-radius: 0 0 12px 0; background: #181818; color: #fff; font-size: 12px; text-align: center; }
.case-card__body { min-height: 215px; padding: 24px 22px 18px; display: flex; flex: 1; flex-direction: column; }
.case-card__heading { margin: 0 0 8px; font-size: 14px; font-weight: 400; }
.case-card__heading strong { font-size: 17px; }
.case-card__heading span { margin: 0 8px; color: #aaa; }
.case-card__meta { margin: 0 0 14px; font-size: 13px; }
.case-card__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.case-card__tags span { padding: 3px 8px; border-radius: 4px; background: #ececea; color: #777; font-size: 10px; line-height: 1.5; }
.case-card__link { margin-top: auto; min-height: 42px; padding-top: 16px; display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 12px; letter-spacing: .08em; }
.case-card__link img { width: 10px; height: 10px; flex: none; transition: transform .2s ease; }
.case-card:hover .case-card__link img { transform: translateX(3px); }
.case-empty { padding: 50px 24px; background: #fff; text-align: center; color: #555; }
.case-pagination { min-height: 44px; margin-top: 58px; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; }
.case-pagination button { width: 42px; height: 42px; border-radius: 7px; background: #fff; color: #444; }
.case-pagination button[aria-current="page"] { background: #2f765e; color: #fff; }
.case-pagination button:disabled { cursor: default; opacity: .4; }
.case-pagination__ellipsis { width: 24px; text-align: center; color: #666; line-height: 42px; }

@media (max-width: 900px) {
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .case-filter__body { padding-inline: 28px; }
}

@media (max-width: 767px) {
  .case-archive { padding: 50px 0 130px; }
  .case-archive .section-eyebrow { margin-inline: 20px; }
  .case-filter { margin-top: 28px; }
  .case-filter__summary { width: max-content; max-width: calc(100% - 40px); margin-inline: auto; justify-content: space-between; }
  .case-filter__body { min-height: 974px; padding: 6px 15px 20px; }
  .case-filter__keyword { display: block; padding: 12px 0; }
  .case-filter__keyword > label { display: block; padding: 0 0 7px; font-size: 11px; }
  .case-filter__keyword-control { grid-template-columns: 1fr 64px; gap: 6px; }
  /* iOS Safariの入力時ズームを防ぐため、フォーム部品は16px以上にする。 */
  .case-filter__keyword input { min-height: 42px; font-size: 16px; }
  .case-filter__keyword-control button { min-width: 0; padding-inline: 10px; }
  .case-filter__group { display: block; padding: 12px 0; }
  .case-filter__group legend { float: none; width: auto; padding: 0 0 7px; font-size: 11px; }
  .case-filter__options { gap: 6px; }
  .filter-chip span { min-height: 30px; padding: 3px 10px; font-size: 10px; }
  .case-filter__footer { flex-direction: column; gap: 10px; }
  .case-filter__footer button[type="submit"] { width: 100%; }
  .case-archive__status { display: none; }
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding: 28px 8px 0; }
  .case-card { border-radius: 7px; }
  .case-card__media { aspect-ratio: 3 / 2; }
  .case-card__media time { min-width: 82px; padding: 4px 8px; font-size: 9px; }
  .case-card__body { min-height: 100px; padding: 10px 9px 0; }
  .case-card__heading { margin-bottom: 5px; font-size: 10px; line-height: 1.55; }
  .case-card__heading strong { display: block; font-size: 13px; }
  .case-card__heading span { display: none; }
  .case-card__meta { margin-bottom: 7px; font-size: 10px; line-height: 1.65; }
  .case-card__tags { display: none; }
  .case-card__link { min-height: 38px; margin: auto -9px 0; padding: 0; border-top: 1px solid #e1e1e1; font-size: 8px; }
  .case-pagination { gap: 6px; margin-top: 70px; padding-inline: 8px; }
  .case-pagination button { width: 38px; height: 38px; }
  .case-pagination__ellipsis { width: 14px; line-height: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  .case-card, .case-card__media img, .case-card__link img, .case-filter__toggle::after { transition: none; }
}