html {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 40px;
  background-color: #1a1a1a;
  color: #fff;
}

@keyframes rainbowChange {
  0% { color: #ff0000; }  /* 빨강 */
  14% { color: #ff7f00; } /* 주황 */
  28% { color: #ffff00; } /* 노랑 */
  42% { color: #00ff00; } /* 초록 */
  57% { color: #0000ff; } /* 파랑 */
  71% { color: #8b00ff; } /* 보라 */
  85% { color: #ff00ff; } /* 핑크 */
  100% { color: #ff0000; } /* 다시 빨강으로 */
}

h1 {
  font-size: 3em;
  text-transform: uppercase;
  letter-spacing: 5px;
  text-align: center;
  margin-bottom: 30px;
  animation: rainbowChange 14s linear infinite;
}

p {
  font-size: 1.2em;
  color: #00ffff;
  text-align: center;
  font-style: italic;
  margin-bottom: 40px;
}

ul {
  list-style-type: none;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

li {
  margin: 10px;
  padding: 10px;
  background-color: #333;
  border-radius: 5px;
  transition: transform 0.3s ease;
}

li:hover {
  transform: scale(1.05);
}

a {
  color: #ffff00;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

a:hover {
  color: #ff8c00;
}