/* --- 1. 固定サイドバー (Left Side) --- */
.fixed-sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 80px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
  background: var(--jilaf2); /* ここはあえて共通化せず個別の質感を維持 */
  border-right: 1px solid #eee;
  padding-top: 120px;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 25px;
  margin-bottom: 50px;
  align-items: center;
}

.social-links a {
  color: var(--text-main);
  font-size: 1.2rem;
  transition: 0.3s;
}

.social-links a i {
  display: block;
  font-size: 1.8rem;
  color: var(--white);
}

.social-links a:hover {
  color: var(--white);
  scale: 1.1;
}

.scroll-text {
  writing-mode: vertical-rl;
  text-transform: uppercase;
  font-family: var(--font-en); /* common.cssにMontserratがあれば */
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--white);
}

.scroll-text::after {
  content: "";
  display: block;
  width: 1px;
  height: 50px;
  background: #ccc;
  margin: 10px auto 0;
}

@media (max-width: 900px) {
  .fixed-sidebar {
    display: none;
  }
}