body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP",
                 "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    background: #f7f7f7;
    color: #222;
  }

.image-set {
  margin-bottom: 10px;
}

.image-container {
  width: 300px;
  margin-bottom: 20px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.main-image {
  width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  touch-action: manipulation; /* スマホでピンチイン・アウト有効 */
}

.img-links {
  text-align: center;
  margin-bottom: 20px;
}

.img-link {
  margin-right: 15px;
  text-decoration: underline;
  cursor: pointer;
  font-size: 1.1em;
}

.img-link:last-child {
  margin-right: 0;
}

.img-link.active {
  font-weight: bold;
  text-decoration: none;
  cursor: default;
}

/* ポップアップ用 */
.popup-overlay {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  align-items: center;
  justify-content: center;
}
.popup-overlay.active {
  display: flex;
}
.popup-image {
  max-width: 90vw;
  max-height: 80vh;
  border: 8px solid #fff;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 2px 16px rgba(0,0,0,0.5);
}
.popup-close {
  position: absolute;
  top: 30px;
  right: 30px;
  color: #fff;
  font-size: 2.4em;
  font-weight: bold;
  cursor: pointer;
  z-index: 10000;
  text-shadow: 0 0 8px #000;
}

/* 親要素にflexを指定 */
.row-flex {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 24px; /* 左右の間隔はお好みで */
}

.tech_frame {
  margin: 5px 0 15px 20px;
  padding: 16px;
  background-color: #fff;
  border-radius: 20px;

  /* 影 */
  box-shadow:
    0 0 8px rgba(0, 0, 0, 0.12),
    0 0 2px rgba(0, 0, 0, 0.04);
}


/* 左右の幅調整（任意） */
.left-side_class {
/*  flex: 1 1 320px;*/
/*  min-width: 320px;*/
}
.right-side_class {
/*  flex: 1 1 320px; */
  min-width: 0;
}

/* スマホ時は縦並び */
@media (max-width: 768px) {
  .row-flex {
    flex-direction: column;
    gap: 0;
  }
  .left-side_class, .right-side_class {
    width: 100%;
    max-width: none;
  }
}

.linemark{
	background:-moz-linear-gradient(transparent 60%, #ffff66 60%);	
	background:-webkit-linear-gradient(transparent 60%, #ffff66 60%);	
	background:linear-gradient(transparent 60%, #ffff66 60%);
}

.tech_title{
    font-weight:bold;
    font-size:1em;
}


/* === Dot navigation for image switcher（追加）=== */
.img-dots {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px; /* 旧 .img-links と同じ余白感 */
  /* text-align:center; は flex なので不要 */
}

.img-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid #FFFFFF;
  background: transparent;
  padding: 0;
  cursor: pointer;
  background-color:#DDDDDD;
}

.img-dot.active {
  background: #FFFFFF;
  cursor: default;
  background-color:#4C6AD9; /* Artspira Color : #4C6AD9 */
}

.img-dot:focus-visible {
  outline: 2px solid #1a73e8;
  outline-offset: 3px;
}