*{
   box-sizing: border-box;
   margin: 0;
}

body {
  margin: 0;
  font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
  background-color: #f9fafb;
  color: #333;
}

.guide-container {
  max-width: 420px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

.title {
  font-size: 1.7rem;
  margin-bottom: 20px;
  color: #222;
}

#image-title,#text-description{
  white-space: pre-wrap;
  word-break: keep-all;
}

.menu, .submenu, .image-view {
  display: none;
  transition: opacity 0.3s ease;
}

.menu.active, .submenu.active, .image-view.active {
  display: block;
  opacity: 1;
}

.menu-btn,.menu-btn_link, .back-btn {
  display: block;
  width: 100%;
  padding: 14px;
  margin: 10px 0;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  background-color: #007bff;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.25s ease;
  text-decoration: none;
}

.menu-btn:hover, .menu-btn_link:hover {
  background-color: #005fcc;
}

.back-btn {
  background-color: #f1f3f5;
  color: #333;
  outline: 2px solid #ffffff;
}

.back-btn:hover {
  background-color: #e0e0e0;
}

img {
  width: 100%;
  max-width: 380px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  margin-top: 15px;
}