body {
  font-family: 'Noto Sans JP', sans-serif;
  background: #f4f4f8;
  margin: 0;
  padding: 20px;
}

h1, h2 {
  text-align: center;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.potion {
  width: 120px;
  margin: 40px auto;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.potion img {
  width: 100%;
  border-radius: 10px;
}

.potion:hover {
  transform: translateY(-5px) rotate(-2deg);
  box-shadow: 0 0 20px rgba(255, 100, 200, 0.5);
}

.btn {
  display: inline-block;
  background: #222;
  color: #fff;
  padding: 12px 20px;
  margin: 20px auto;
  text-decoration: none;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  font-size: 1em;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.site-footer {
  background: #f8f8f8;
  padding: 30px;
  font-size: 0.9em;
  color: #444;
  text-align: center;
}