/* =============================================================================
   case-detail.css — 行銷與內容服務案例詳情
   版面：左側資訊欄（麵包屑、服務類別、標題、內文、連結、返回）在桌機固定於視窗內，
   右側依原始比例完整展示所有作品圖，不裁切；點圖以燈箱放大（js/case-detail.js）。
   字級、眉標、按鈕、文字連結使用元件庫；本檔負責版面、間距與圖片展示。
   ============================================================================= */

.case-detail-page {
  --ds-font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --case-gutter: clamp(32px, 8vw, 64px);
  --case-ease-out: cubic-bezier(.16, 1, .3, 1);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--ds-font-sans);
  background: var(--ds-color-page);
  overflow-x: clip;
}

.case-container {
  width: min(100% - var(--case-gutter), var(--ds-container-max));
  margin-inline: auto;
}

/* =============================================================================
   1. 資訊欄＋作品圖
   ============================================================================= */
.case-article {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.75fr);
  align-items: start;
  gap: clamp(var(--ds-space-2xl), 6vw, var(--ds-space-4xl));
  padding-block: calc(var(--ds-navbar-height) + clamp(var(--ds-space-2xl), 5vw, var(--ds-space-3xl))) var(--ds-space-3xl);
  isolation: isolate;
}

.case-article::before {
  content: "";
  position: absolute;
  inset: 0 -20vw auto;
  height: 520px;
  z-index: -1;
  background:
    radial-gradient(closest-side, var(--ds-color-primary-wash), transparent 70%) 5% 30% / 50% 90% no-repeat,
    radial-gradient(closest-side, var(--ds-color-secondary-wash), transparent 70%) 40% 0% / 40% 70% no-repeat;
  pointer-events: none;
}

.case-article__info {
  position: sticky;
  top: calc(var(--ds-navbar-height) + var(--ds-space-xl));
}

/* 內文較長、資訊欄高於可視範圍時，js/case-detail.js 加上 is-static 改為隨頁面捲動 */
.case-article__info.is-static { position: static; }

.case-article__info-inner > * {
  opacity: 0;
  transform: translateY(14px);
  animation: case-rise .9s var(--case-ease-out) forwards;
}

.case-article__info-inner > :nth-child(2) { animation-delay: .06s; }
.case-article__info-inner > :nth-child(3) { animation-delay: .12s; }
.case-article__info-inner > :nth-child(n + 4) { animation-delay: .2s; }

@keyframes case-rise { to { opacity: 1; transform: none; } }

.case-article__crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--ds-space-xs);
  color: var(--ds-color-text-muted);
  font-size: var(--ds-text-body-sm-size);
  line-height: var(--ds-text-body-sm-line);
}

.case-article__crumbs a { transition: color var(--ds-duration-fast) var(--ds-ease); }
.case-article__crumbs a:hover { color: var(--ds-color-text-primary); }

.case-article__title { margin-top: var(--ds-space-lg); text-wrap: balance; }

.case-article__body {
  margin-top: var(--ds-space-lg);
  padding-left: var(--ds-space-lg);
  border-left: 3px solid var(--ds-color-primary);
}

.case-article__body p { line-height: 1.95; }
.case-article__body p + p { margin-top: var(--ds-space-md); }

.case-article__link { margin-top: var(--ds-space-xl); }

.case-article__back {
  display: flex;
  width: fit-content;
  margin-top: var(--ds-space-xl);
  padding-top: var(--ds-space-lg);
  border-top: var(--ds-border-width) solid var(--ds-color-border);
}

/* 作品圖：依原始比例完整呈現；直式長圖（網頁截圖）限制寬度並置中 */
.case-gallery {
  display: grid;
  gap: clamp(var(--ds-space-xl), 3vw, var(--ds-space-2xl));
}

.case-gallery__item {
  margin: 0;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .9s var(--case-ease-out), transform .9s var(--case-ease-out);
}

/* js/case-detail.js 在圖片進入視窗時加上 is-visible；沒有 JS 時由下方 :not 規則直接顯示 */
.case-gallery__item.is-visible,
.case-gallery:not([data-gallery-ready]) .case-gallery__item { opacity: 1; transform: none; }

.case-gallery__item--tall { width: min(100%, 560px); justify-self: center; }

.case-gallery__open {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: var(--ds-border-width) solid var(--ds-color-border);
  border-radius: var(--ds-radius-lg);
  overflow: hidden;
  background: var(--ds-color-surface-inner);
  box-shadow: var(--ds-shadow-panel);
  cursor: zoom-in;
  transition: box-shadow var(--ds-duration-slow) var(--ds-ease), border-color var(--ds-duration-slow) var(--ds-ease);
}

.case-gallery__open img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 1.2s var(--case-ease-out);
}

.case-gallery__open:hover { border-color: var(--ds-color-primary-55); box-shadow: 0 30px 60px -30px rgba(30, 14, 98, .35); }
.case-gallery__open:hover img { transform: scale(1.015); }
.case-gallery__open:focus-visible { outline: none; box-shadow: var(--ds-shadow-focus); }

.case-gallery__zoom {
  position: absolute;
  right: var(--ds-space-md);
  bottom: var(--ds-space-md);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--ds-radius-full);
  background: color-mix(in srgb, var(--ds-color-card) 92%, transparent);
  color: var(--ds-color-text-primary);
  box-shadow: var(--ds-shadow-md);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--ds-duration-slow) var(--ds-ease), transform var(--ds-duration-slow) var(--ds-ease);
}

.case-gallery__open:hover .case-gallery__zoom,
.case-gallery__open:focus-visible .case-gallery__zoom { opacity: 1; transform: none; }

.case-article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ds-space-xs);
  margin-top: var(--ds-space-md);
}

/* 影片片段：16:9 黑底完整呈現，不裁切畫面中的標註與字幕 */
.case-gallery__video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: var(--ds-border-width) solid var(--ds-color-border);
  border-radius: var(--ds-radius-lg);
  background: #000;
  box-shadow: var(--ds-shadow-panel);
  object-fit: contain;
}

.case-gallery__caption {
  display: flex;
  align-items: center;
  gap: var(--ds-space-xxs);
  margin-top: var(--ds-space-sm);
  color: var(--ds-color-text-secondary);
  font-size: var(--ds-text-body-sm-size);
  line-height: var(--ds-text-body-sm-line);
  font-weight: var(--ds-weight-medium);
}

.case-gallery__caption .ds-icon { color: var(--ds-color-primary); }

.case-gallery__count {
  margin-top: var(--ds-space-sm);
  color: var(--ds-color-text-muted);
  font-size: var(--ds-text-caption-size);
  line-height: var(--ds-text-caption-line);
  font-weight: var(--ds-weight-semibold);
  letter-spacing: var(--ds-tracking-wide);
  font-variant-numeric: tabular-nums;
}

@media (width <= 1024px) {
  .case-article { grid-template-columns: 1fr; }
  .case-article__info { position: static; }
  .case-article__info-inner { max-width: 40rem; }
}

/* =============================================================================
   2. 同分類的上一個／下一個案例
   ============================================================================= */
.case-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--ds-space-md);
  padding-block: var(--ds-space-2xl) var(--ds-space-4xl);
  border-top: var(--ds-border-width) solid var(--ds-color-border);
}

.case-pager__item {
  display: flex;
  align-items: center;
  gap: var(--ds-space-lg);
  padding: var(--ds-space-md);
  border: var(--ds-border-width) solid var(--ds-color-border);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-color-card);
  transition: border-color var(--ds-duration-slow) var(--ds-ease), box-shadow var(--ds-duration-slow) var(--ds-ease), transform 500ms var(--case-ease-out);
}

.case-pager__item.is-empty { visibility: hidden; }

.case-pager__item--next { justify-content: flex-end; text-align: right; }

a.case-pager__item:hover,
a.case-pager__item:focus-visible {
  border-color: var(--ds-color-primary-55);
  box-shadow: var(--ds-shadow-cyan);
  transform: translateY(-2px);
  outline: none;
}

.case-pager__thumb {
  flex-shrink: 0;
  width: 96px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-surface-muted);
}

.case-pager__thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }

.case-pager__text { display: grid; gap: var(--ds-space-xxs); min-width: 0; }

.case-pager__label {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-xxs);
  color: var(--ds-color-secondary);
  font-size: var(--ds-text-label-sm-size);
  font-weight: var(--ds-weight-semibold);
}

.case-pager__item--next .case-pager__label { justify-content: flex-end; }

.case-pager__label .ds-icon { transition: transform var(--ds-duration-slow) var(--ds-ease); }
a.case-pager__item--prev:hover .case-pager__label .ds-icon { transform: translateX(-4px); }
a.case-pager__item--next:hover .case-pager__label .ds-icon { transform: translateX(4px); }

.case-pager__title {
  overflow: hidden;
  color: var(--ds-color-text-primary);
  font-size: var(--ds-text-body-lg-size);
  font-weight: var(--ds-weight-semibold);
  white-space: nowrap;
  text-overflow: ellipsis;
}

@media (width <= 768px) {
  .case-pager { grid-template-columns: 1fr; }
  .case-pager__item.is-empty { display: none; }
  .case-pager__thumb { width: 72px; }
}

/* =============================================================================
   3. 燈箱
   ============================================================================= */
.case-lightbox {
  width: 100vw;
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgba(10, 10, 14, .94);
  color: var(--ds-color-on-dark);
}

.case-lightbox::backdrop { background: transparent; }

.case-lightbox[open] { animation: case-fade .3s var(--ds-ease); }

@keyframes case-fade { from { opacity: 0; } }

.case-lightbox__stage {
  display: grid;
  place-items: start center;
  height: 100%;
  overflow: auto;
  padding: 72px clamp(16px, 8vw, 96px);
  overscroll-behavior: contain;
}

/* 橫式圖完整置中；直式長圖可在燈箱內上下捲動 */
.case-lightbox__image {
  max-width: min(100%, 1400px);
  height: auto;
  margin-block: auto;
  border-radius: var(--ds-radius-md);
}

.case-lightbox__count {
  position: absolute;
  left: 50%;
  bottom: var(--ds-space-lg);
  padding: var(--ds-space-xxs) var(--ds-space-sm);
  border-radius: var(--ds-radius-full);
  background: rgba(255, 255, 255, .12);
  font-size: var(--ds-text-caption-size);
  font-weight: var(--ds-weight-semibold);
  font-variant-numeric: tabular-nums;
  transform: translateX(-50%);
}

.case-lightbox__btn {
  position: absolute;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: var(--ds-radius-full);
  background: rgba(255, 255, 255, .12);
  color: var(--ds-color-on-dark);
  cursor: pointer;
  transition: background-color var(--ds-duration-fast) var(--ds-ease);
}

.case-lightbox__btn:hover { background: rgba(255, 255, 255, .24); }
.case-lightbox__btn:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--ds-color-cyan); }
.case-lightbox__btn:disabled { opacity: .3; cursor: default; }

.case-lightbox__btn--close { top: var(--ds-space-md); right: var(--ds-space-md); }
.case-lightbox__btn--prev { left: var(--ds-space-md); top: 50%; transform: translateY(-50%); }
.case-lightbox__btn--next { right: var(--ds-space-md); top: 50%; transform: translateY(-50%); }

/* =============================================================================
   4. 找不到案例
   ============================================================================= */
.case-missing {
  padding-block: calc(var(--ds-navbar-height) + var(--ds-space-4xl)) var(--ds-space-5xl);
}

.case-missing .ds-lead { margin-block: var(--ds-space-md) var(--ds-space-lg); }

@media (prefers-reduced-motion: reduce) {
  .case-article__info-inner > * { animation: none; opacity: 1; transform: none; }
  .case-gallery__item { opacity: 1; transform: none; transition: none; }
  .case-gallery__open,
  .case-gallery__open img,
  .case-gallery__zoom,
  .case-pager__item,
  .case-pager__label .ds-icon { transition: none; }
  .case-gallery__open:hover img,
  a.case-pager__item:hover { transform: none; }
  .case-lightbox[open] { animation: none; }
}