.social-login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  max-width: 300px;
  margin: 0 auto;
}
.social-btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 1.3rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
}
/* สีเฉพาะแต่ละปุ่ม */
.social-btn.facebook {
  background: #3b5998;
}
.social-btn.instagram {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}
.social-btn.line {
  background: #00c300;
}
.social-btn.google {
  background: #db4437;
}
.social-btn.email {
  background: #6c757d; /* สีเทาเข้มสำหรับ email */
}
/* Hover effect */
.social-btn:hover {
  opacity: 0.9;
}