body {
  margin: 0;
  padding: 24px;
  font-family: sans-serif;
  line-height: 1.8;
  color: #222;
  background: #f5f5f5;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px;
  background: #fff;
  border: 1px solid #ccc;
}

main.wide {
  max-width: 1080px;
}

h1 {
  margin-top: 0;
  padding-bottom: 12px;
  border-bottom: 2px solid #333;
  font-size: 28px;
}

h2 {
  margin-top: 40px;
  padding-left: 10px;
  border-left: 6px solid #333;
  font-size: 22px;
}

h3 {
  margin-top: 28px;
  font-size: 18px;
}

ul,
ol {
  padding-left: 1.5em;
}

a {
  color: #06c;
}

img {
  max-width: 100%;
  height: auto;
  border: 1px solid #ccc;
}

code {
  font-family: Consolas, Menlo, Monaco, monospace;
}

pre {
  overflow-x: auto;
  padding: 16px;
  background: #f0f0f0;
  border: 1px solid #ccc;
}

.note {
  margin-top: 48px;
  font-size: 14px;
  color: #666;
}

.screenshot-list {
  display: grid;
  gap: 16px;
}

@media (max-width: 600px) {
  body {
    padding: 12px;
  }

  main {
    padding: 20px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }
}

/* 以下ライトボックス用 */
main img {
  cursor: zoom-in;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.75);
}

.image-lightbox.active {
  display: flex;
}

.image-lightbox img {
  max-width: 95vw;
  max-height: 95vh;
  width: auto;
  height: auto;
  background: #fff;
  border: 1px solid #ccc;
  cursor: zoom-out;
}

/* 以下スクショスクロール用 */

.screenshot-section {
  margin-top: 2rem;
}

.screenshot-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding: 0.5rem 0 1rem;
  scroll-snap-type: x mandatory;
}

.screenshot-scroll figure {
  flex: 0 0 min(80vw, 640px);
  margin: 0;
  scroll-snap-align: start;
}

.screenshot-scroll img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.screenshot-scroll figcaption {
  margin-top: 0.4rem;
  font-size: 0.9rem;
  color: #666;
}

.scroll-note {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 0.5rem;
}