/* 基本設定 */
body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background-color: #ffffff;
  color: #111111;
}

/* ナビゲーション */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 2rem;
  border-bottom: 1px solid #eeeeee;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: #111111;
  text-decoration: none;
  font-size: 1rem;
  letter-spacing: 0.1em;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #888888;
}