/* 共通ベース（既にある場合は重複しないよう調整してください） */
.social-btn{
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  font-family: "Helvetica Neue", Arial, sans-serif;
  white-space: nowrap;
  margin-top: 0.5rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}
.social-btn .s-icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: rgba(255,255,255,0.12);
  border-radius: 8px;
  font-size: 1.1rem;
}
.social-btn .s-label{
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.social-btn .s-title{
  font-weight: 700;
  font-size: 0.95rem;
}
.social-btn .s-sub{
  font-size: 0.65rem;
  opacity: 0.9;
  margin-top: 2px;
}
.social-btn:active{ transform: translateY(-1px) scale(.995); }
@media (max-width:420px){
  .social-btn{ padding:0.5rem 0.75rem; gap:0.5rem; }
  .social-btn .s-title{ font-size:0.85rem; }
  .social-btn .s-sub{ display:none; }
  .frametxt{margin-top: 1.3rem;}
}

/* Instagram 個別 */
.social-btn.insta-btn{
  background: linear-gradient(90deg,#ff7a18,#af002d 60%,#320b86);
  box-shadow: 0 6px 18px rgba(50,11,134,0.18);
}
.social-btn.insta-btn:hover{
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 14px 30px rgba(50,11,134,0.22);
  filter: saturate(1.08);
}

/* Facebook 個別 */
.social-btn.fb-btn{
  background: linear-gradient(90deg,#1877f2 0%,#0f63c9 60%,#0b4db0);
  box-shadow: 0 6px 18px rgba(11,77,176,0.18);
}
.social-btn.fb-btn .s-icon{ background: rgba(255,255,255,0.08); }
.social-btn.fb-btn:hover{
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 14px 30px rgba(11,77,176,0.22);
  filter: saturate(1.06);
}