.instagram-btn{
  --bg1: #f09433;
  --bg2: #e6683c;
  --bg3: #dc2743;
  --bg4: #cc2366;
  --bg5: #bc1888;
  --text: #fff;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: linear-gradient(45deg,var(--bg1),var(--bg2),var(--bg3),var(--bg4),var(--bg5));
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.18);
  transition: box-shadow .25s ease, transform .18s ease;
  overflow: hidden;
}

.instagram-btn .i-icon,
.instagram-btn .i-text{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .28s cubic-bezier(.2,.9,.2,1), opacity .2s;
}

.instagram-btn .i-icon{
  width: 28px;
  height: 28px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  padding: 4px;
  box-sizing: border-box;
  color: white;
  transform: translateX(-6px);
}

.instagram-btn .i-text{
  transform: translateX(0);
  white-space: nowrap;
  font-size: 15px;
}

/* Hover */
.instagram-btn:hover,
.instagram-btn:focus{
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
  transform: translateY(-3px);
  text-decoration: none;
  outline: none;
}
.instagram-btn:hover .i-icon,
.instagram-btn:focus .i-icon{
  transform: translateX(6px) scale(1.05);
}
.instagram-btn:hover .i-text,
.instagram-btn:focus .i-text{
  transform: translateX(6px);
}
.instagram-btn:active{
  transform: translateY(-1px) scale(.98);
}

/* Responsividade */
@media (max-width:480px){
  .instagram-btn{
    width:100%;
    justify-content:center;
    padding:14px;
    font-size:16px;
  }
}
@media (max-width:360px){
  .instagram-btn .i-text{
    display:none;
  }
  .instagram-btn{
    width:56px;
    height:56px;
    padding:0;
    border-radius:50%;
  }
  .instagram-btn .i-icon{
    transform:none;
    width:32px;
    height:32px;
  }
}