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

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background-color: #ffffff;
  color: #61C892;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  background-image: radial-gradient(#e0f1e8 1px, transparent 1px);
  background-size: 16px 16px;
}

.header {
  font-weight: 700;
  font-size: 2.8rem;
  letter-spacing: 0.15em; 
  text-transform: uppercase;
  margin-bottom: 2rem;
  color: #61C892;
  user-select: none;
  font-family: 'Comic Sans MS', cursive, 'Helvetica Neue', Arial, sans-serif; 
  text-shadow: 1px 1px 2px rgba(97, 200, 146, 0.4); 
}

/* メニュー */
.menu {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.menu-item {
  color: #61C892;
  text-decoration: none;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: 12px; 
  transition: background-color 0.25s ease, color 0.25s ease;
  user-select: none;
  box-shadow: 0 2px 5px rgba(97, 200, 146, 0.2); 
}
.menu-item:hover,
.menu-item:focus {
  background-color: #61C892;
  color: #ffffff;
  outline: none;
  box-shadow: 0 4px 10px rgba(97, 200, 146, 0.5);
}

.contents1 {
  max-width: 640px;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #f6fbf5;
  border-radius: 16px;
  padding: 0;
  box-shadow: 0 6px 20px rgba(86, 111, 74, 0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
  overflow: hidden;
}

.contents2 {
  max-width: 640px;
  width: 100%;
  background-color: #f6fbf5;
  border-radius: 16px;
  padding: 3rem 2.5rem;
  box-shadow: 0 6px 20px rgba(86, 111, 74, 0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery-slideshow {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slide.active {
  opacity: 1;
  z-index: 1;
}

.page-title {
  font-size: 1.5rem;
  font-weight: bold;
  color: #5AAE7D;
  margin-bottom: 2rem;
  text-align: center;
  user-select: none;
  font-family: 'Comic Sans MS', cursive, 'Helvetica Neue', Arial, sans-serif;
  text-shadow: 1px 1px 2px rgba(90, 174, 125, 0.4);
}


.bt02 {
  color: #4a7050;
}