/* /infographic/ の CSS。課題46 D2 で各ページの <style> から移し、
   D3 PR 2（2026-10-20）で「鉄と錆止め」へ。色と書体は /assets/css/tokens.css（先に読む）。
   角丸・影は使わない（tools/site-redesign-design.md §1・§3） */
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  line-height: 1.6;
}

.page-header {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 16px 20px;
}

.page-header .back-link {
  display: inline-block;
  color: var(--c-text);
  text-decoration: underline;
  text-underline-offset: .18em;
  text-decoration-thickness: 1px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.page-header .back-link:hover { text-decoration-thickness: 2px; }

.page-header h1 {
  margin: 0 0 10px;
  font-size: clamp(22px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-header p {
  margin: 0;
  color: var(--c-text);
  font-size: clamp(14px, 1.8vw, 17px);
  max-width: 820px;
}

.infographic-gallery {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 12px 80px;
}

.infographic-gallery figure {
  margin: 0 0 28px;
}

.infographic-gallery img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  background: var(--c-surface);
}

.infographic-note {
  max-width: 1400px;
  margin: -48px auto 80px;
  padding: 0 12px;
  color: var(--c-text-mute);
  font-size: 13px;
  line-height: 1.7;
}

.jump-nav {
  max-width: 1400px;
  margin: 20px auto 18px;
  padding: 0 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.jump-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 9px 14px;
  border: 1px solid var(--c-rule);
  color: var(--c-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.jump-nav a:hover {
  background: var(--c-surface);
  border-color: var(--c-text);
}

.infographic-gallery figure {
  scroll-margin-top: 84px;
}

@media (max-width: 768px) {
  .page-header { padding: 20px 12px 16px; }

  .jump-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 0 10px;
    margin: 16px auto 18px;
    overflow-x: visible;
    max-width: 520px;
  }

  .jump-nav a {
    width: 100%;
    min-height: 38px;
    padding: 8px 8px;
    font-size: 12.5px;
    line-height: 1.25;
    text-align: center;
    white-space: normal;
  }

  .infographic-gallery {
    padding: 16px 8px 56px;
  }

  .infographic-gallery figure {
    margin-bottom: 18px;
  }

  .infographic-note {
    margin-top: -32px;
    font-size: 12px;
  }
}

@media (max-width: 380px) {
  .jump-nav a {
    font-size: 11.5px;
    padding: 8px 6px;
  }
}

/* ── zoom-block: 1枚目左右拡大 ── */
.zoom-block-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 12px auto 4px;
  flex-wrap: wrap;
}

.zoom-block-btn {
  appearance: none;
  border: 1px solid var(--c-rule);
  background: var(--c-surface);
  color: var(--c-text);
  border-radius: 0;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.zoom-block-btn:hover,
.zoom-block-btn:focus-visible {
  border-color: var(--c-text);
  outline: none;
}

.zoom-block-modal[aria-hidden="true"] { display: none; }

.zoom-block-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
}

.zoom-block-backdrop {
  position: absolute;
  inset: 0;
  background: var(--c-bg);
  opacity: 0.9;
}

.zoom-block-dialog {
  position: relative;
  z-index: 1;
  width: min(100vw, 1440px);
  height: 100dvh;
  margin: 0 auto;
  background: var(--c-bg);
  color: var(--c-text);
  display: flex;
  flex-direction: column;
}

.zoom-block-header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-rule);
}

.zoom-block-header h2 {
  margin: 0;
  font-size: 15px;
  line-height: 1.4;
}

.zoom-block-close {
  appearance: none;
  border: 1px solid var(--c-rule);
  background: var(--c-surface);
  color: var(--c-text);
  border-radius: 0;
  width: 36px;
  height: 36px;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.zoom-block-scroll {
  flex: 1 1 auto;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0;
}

.zoom-block-crop {
  width: 100%;
  overflow: hidden;
  background: var(--c-bg);
}

.zoom-block-crop img {
  display: block;
  max-width: none;
  height: auto;
}

/* 1枚目：58:42 */
.zoom-block-crop.split-58-42.is-left img {
  width: 172.4138%;
  transform: translateX(0);
}
.zoom-block-crop.split-58-42.is-right img {
  width: 238.0952%;
  transform: translateX(-58%);
}

/* 2枚目：56:44 */
.zoom-block-crop.split-56-44.is-left img {
  width: 178.5714%;
  transform: translateX(0);
}
.zoom-block-crop.split-56-44.is-right img {
  width: 227.2727%;
  transform: translateX(-56%);
}

/* 3枚目：50:50 */
.zoom-block-crop.split-50-50.is-left img {
  width: 200%;
  transform: translateX(0);
}
.zoom-block-crop.split-50-50.is-right img {
  width: 200%;
  transform: translateX(-50%);
}

/* 5枚目：38:20:42 */
.zoom-block-crop.split-38-20-42.is-left img {
  width: 263.1579%;
  transform: translateX(0);
}
.zoom-block-crop.split-38-20-42.is-center img {
  width: 500%;
  transform: translateX(-38%);
}
.zoom-block-crop.split-38-20-42.is-right img {
  width: 238.0952%;
  transform: translateX(-58%);
}

/* 4枚目：38:21:41 */
.zoom-block-crop.split-38-21-41.is-left img {
  width: 263.1579%;
  transform: translateX(0);
}
.zoom-block-crop.split-38-21-41.is-center img {
  width: 476.1905%;
  transform: translateX(-38%);
}
.zoom-block-crop.split-38-21-41.is-right img {
  width: 243.9024%;
  transform: translateX(-59%);
}

@media (max-width: 768px) {
  .zoom-block-controls {
    margin-top: 10px;
    gap: 8px;
  }

  .zoom-block-btn {
    min-width: 112px;
    padding: 9px 14px;
    font-size: 13px;
  }

  .zoom-block-header {
    padding: 8px 10px;
  }

  .zoom-block-header h2 {
    font-size: 14px;
  }
}