.tw-tab-adult {
  color: #ff5fa2; /* var(--pink) */
}
.tw-tab-adult:hover {
  color: #e0488a;
}
.tw-tab-adult.is-active {
  background: linear-gradient(180deg, #ff5fa2 0%, #e0488a 100%);
  color: #fff;
}

/* Login Promo Section */
.login-promo {
  position: relative;
  margin-top: 30px;
  overflow: hidden;
  border-radius: 24px;
  /* 背景用コンテナの高さ確保 */
  min-height: 320px;
  background: #f7f9f9;
}

.login-promo-bg {
  position: absolute;
  inset: -20px; /* 少しはみ出させてぼかしの端を見せない */
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  grid-auto-rows: max-content;
  gap: 16px;
  padding: 20px;
  opacity: 0.7;
  filter: blur(5px); /* すりガラス風ぼかし */
  pointer-events: none;
  user-select: none;
  mask-image: linear-gradient(to bottom, black 20%, transparent 95%);
  -webkit-mask-image: linear-gradient(to bottom, black 20%, transparent 95%);
  z-index: 1;
}

/* 背景用の簡易ツイートカード */
.promo-tw-card {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  gap: 12px;
}
.promo-tw-icon {
  width: 40px; height: 40px; border-radius: 999px; background: #e1e8ed;
  flex-shrink: 0;
  overflow: hidden;
}
.promo-tw-icon img { width: 100%; height: 100%; object-fit: cover; }
.promo-tw-content { flex: 1; }
.promo-tw-line { height: 10px; background: #e1e8ed; border-radius: 5px; margin-bottom: 8px; width: 80%; }
.promo-tw-line.short { width: 50%; }

.login-promo-overlay {
  position: relative;
  z-index: 5;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
  padding: 20px;
}

.login-promo-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 
    0 20px 50px rgba(0, 0, 0, 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.5) inset;
  border-radius: 28px;
  padding: 40px 30px;
  text-align: center;
  max-width: 480px;
  width: 100%;
  transform: translateY(0);
  transition: transform 0.3s ease;
}
.login-promo-card:hover {
  transform: translateY(-2px);
}

.login-promo-title {
  font-size: 24px;
  font-weight: 900;
  margin: 0 0 12px;
  color: #1d9bf0; /* var(--blue) - Site primary color */
  display: inline-block;
}