/* 研磨事例 一覧（archive-case_study.php）— 先頭1件は 60° の写真窓、以降はアイキャッチ付きのカード
   デザイン: clients/barrel-polish/design/2026-10-06_renewal/build_a_sub2.py list_page() */

/* ---- 絞り込み ---- */
.rn-cases__filter-wrap { padding: 56px 0; }
.rn-cases .rn-cases__filter { display: flex; gap: 48px; align-items: flex-start; margin: 0; padding: 0; background: none; border: 0; box-shadow: none; }
.rn-cases .rn-cases__filter::before { display: none; } /* 旧 archive-common.css の金の上線を消す */
.rn-cases__filter-side { width: 200px; flex-shrink: 0; }
.rn-cases__filter-label { font-size: 11px; color: var(--rn-ink); }
.rn-cases__filter-key { display: block; margin-top: 18px; font-family: var(--rn-font-mono); font-size: 10.5px; letter-spacing: .08em; color: rgba(17, 18, 20, 0.6); }
.rn-cases__search { display: flex; margin-top: 6px; }
.rn-cases__search input { flex: 1; min-width: 0; height: 44px; margin: 0; padding: 0 12px; border: 1px solid rgba(17, 18, 20, 0.3); border-right: 0; border-radius: 0; background: #fff; font: inherit; font-size: 14px; color: var(--rn-ink); box-sizing: border-box; }
.rn-cases__submit { height: 44px; padding: 0 14px; border: 1px solid var(--rn-ink); border-radius: 0; background: var(--rn-ink); color: #fff; font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.rn-cases__submit:hover { opacity: .85; }
.rn-cases__sort { width: 100%; height: 44px; margin-top: 6px; padding: 0 12px; border: 1px solid rgba(17, 18, 20, 0.3); border-radius: 0; background: #fff; font: inherit; font-size: 14px; color: var(--rn-ink); }
.rn-cases__search input:focus-visible, .rn-cases__sort:focus-visible, .rn-cases__submit:focus-visible { outline: 2px solid var(--rn-gold); outline-offset: 2px; }
.rn-cases__reset { margin-top: 20px; font-size: 13px; }
.rn-cases__filter-main { flex: 1; min-width: 0; }
.rn-cases__filter .rn-chip { min-height: 36px; padding: 0 14px; font-size: 13px; font-weight: 400; }
.rn-cases__filter .rn-chip input { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
/* 旧 archive-common.css の .filters-bar__cat（金の地）の上書き */
.rn-cases .rn-chip.filters-bar__cat { background: transparent; color: var(--rn-ink); border-color: rgba(17, 18, 20, 0.25); }
.rn-cases .rn-chip.filters-bar__cat:hover { background: transparent; color: var(--rn-ink); border-color: var(--rn-ink); }
.rn-cases .rn-chip.filters-bar__cat.is-active, .rn-cases .rn-chip.filters-bar__cat:has(input:checked) { background: var(--rn-ink); border-color: var(--rn-ink); color: #fff; }
.rn-cases__filter .rn-chip:focus-within { outline: 2px solid var(--rn-gold); outline-offset: 2px; }
.rn-cases__industries { align-items: center; margin-top: 20px; }
.rn-cases__industries .rn-cases__filter-key { margin: 0 8px 0 0; }

/* ---- 先頭の1件（60° の平行四辺形の写真窓） ---- */
.rn-cases__feat { display: grid; grid-template-columns: minmax(0, 791fr) minmax(0, 465fr); gap: 40px; margin-top: 48px; color: var(--rn-ink); text-decoration: none; }
.rn-cases__feat-photo { position: relative; display: block; aspect-ratio: 791 / 400; }
.rn-cases__feat-photo .rn-cases__feat-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; clip-path: polygon(29.2% 0, 100% 0, 70.8% 100%, 0 100%); transition: transform .5s; }
.rn-cases__feat-line { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.rn-cases__feat-body { padding-top: 30px; }
.rn-cases__feat-meta { display: flex; align-items: center; gap: 12px; }
.rn-cases__feat-meta time { font-size: 12px; color: rgba(17, 18, 20, 0.65); }
.rn-cases__feat-title { margin-top: 18px; font-size: clamp(21px, 1.9vw, 26px); line-height: 1.55; }
.rn-cases__feat-text { margin-top: 16px; font-size: 14px; line-height: 2; color: var(--rn-sub-light); }
.rn-cases__feat-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.rn-cases__tag { padding: 6px 14px; border: 1px solid rgba(17, 18, 20, 0.25); font-size: 13px; line-height: 1.4; }
.rn-cases__feat-more { display: inline-flex; align-items: center; gap: 10px; margin-top: 28px; font-size: 14px; font-weight: 700; }
.rn-cases__feat-more .rn-arrow { width: 16px; height: 16px; transition: transform .2s; }
.rn-cases__feat:hover .rn-cases__feat-more .rn-arrow { transform: translateX(4px); }
.rn-cases__feat:hover .rn-cases__feat-title { text-decoration: underline; text-decoration-color: var(--rn-gold); text-underline-offset: 4px; }

/* ---- カード（アイキャッチ付き・4列。上端と写真の高さを揃える） ---- */
.rn-cases__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 44px 28px; margin-top: 64px; }
.rn-cases__feat + .rn-cases__grid { margin-top: 64px; }
.rn-head-row + .rn-cases__grid { margin-top: 48px; }
.rn-cases__card { display: flex; flex-direction: column; height: 100%; color: var(--rn-ink); text-decoration: none; }
.rn-cases__card-img { display: block; aspect-ratio: 302 / 200; overflow: hidden; background: var(--rn-paper); }
.rn-cases__card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.rn-cases__card:hover .rn-cases__card-img img { transform: scale(1.04); }
.rn-cases__card-date { margin-top: 14px; font-size: 11px; color: rgba(17, 18, 20, 0.6); }
.rn-cases__card-title { margin-top: 6px; font-size: 15px; font-weight: 700; line-height: 1.65; }
.rn-cases__card:hover .rn-cases__card-title { text-decoration: underline; text-decoration-color: var(--rn-gold); text-underline-offset: 3px; }
.rn-cases__card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.rn-cases__empty { margin-top: 48px; }

@media (max-width: 1100px) {
  .rn-cases__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rn-cases__feat { grid-template-columns: 1fr; gap: 8px; }
  .rn-cases__feat-body { padding-top: 16px; }
}
@media (max-width: 900px) {
  .rn-cases__filter-wrap { padding: 40px 0; }
  .rn-cases .rn-cases__filter { flex-direction: column; gap: 24px; }
  .rn-cases__filter-side { width: 100%; }
  .rn-cases__filter .rn-chips { gap: 6px; }
  .rn-cases__filter .rn-chip { min-height: 34px; padding: 0 12px; font-size: 12.5px; }
  .rn-cases__feat { margin-top: 32px; }
  .rn-cases__feat-photo .rn-cases__feat-img { clip-path: polygon(14% 0, 100% 0, 86% 100%, 0 100%); }
  .rn-cases__feat-line { display: none; }
  .rn-cases__feat-text br { display: none; }
  .rn-cases__grid { grid-template-columns: 1fr; gap: 36px; margin-top: 44px; }
}