body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #000;
  font-family: 'Helvetica Neue', sans-serif;
  height: 100vh;
  position: relative;
}

.content-box {
  position: relative;
  z-index: 1;
  background: rgba(0,0,0,0.2);
  border: 4px solid #ffffff;
  border-radius: 20px;
  padding: 50px;
  max-width: 700px;
  margin: auto;
  top: 50%;
  transform: translateY(-50%);
  text-align: center;
  box-shadow: 0 0 20px #ffffff, 0 0 40px #ffffff, inset 0 0 20px #ffffff;
}

.icon {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin-bottom: 20px;
  position: relative;
  z-index: 2;
  /* オーラ */
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.499), 0 0 40px rgba(255,255,255,0.4), 0 0 60px rgba(255,255,255,0.2);
}

.intro-text p {
  margin: 10px 0;
  color: #ffffff;
  font-size: 20px;
  font-weight: 600; /* 少し太く */
}

.links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.link-box {
  border: 2px solid #ffffff;
  border-radius: 10px;
  padding: 12px 20px;
  color: #ffffff;
  text-decoration: none;
  font-size: 16px;
  display: inline-block;
  transition: 0.3s;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.33, 1, 0.68, 1);
}

.link-box:hover {
  box-shadow: 0 0 20px #e0c2ff, 0 0 40px #e6fffa, inset 0 0 20px #5d4f63;
  transform: scale(1.05);
}

#copied-notice {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  color: #000;
  padding: 10px 20px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 1000;
}

/* 雪（漂うフワフワ） */
.snowflake {
  position: absolute;
  width: 5px;
  height: 5px;
  background: #ffffff;
  border-radius: 50%;
  opacity: 0.7;
  pointer-events: none;
}

/* 右下注釈 */
#note {
  position: fixed;
  bottom: 10px;
  right: 10px;
  color: #aaa;
  font-size: 12px;
  z-index: 10;
}