.led_chip { font-size: 12px; padding: 6px 10px; border-radius: 9999px; border: 1px solid rgb(203 213 225); background: white; }
  .led_chip:hover { background: rgb(248 250 252); }
  .led_msg { max-width: 85%; padding: 10px 12px; border-radius: 14px; font-size: 13px; line-height: 1.45; }
  .led_bot { background: rgb(30 64 175); color: white; border-bottom-right-radius: 6px; margin-left: auto; }
  .led_user { background: white; border: 1px solid rgb(226 232 240); border-bottom-left-radius: 6px; }
  .led_typing { display:inline-block; width:24px; height:10px; background:rgba(255,255,255,0.6); border-radius:12px; position:relative; }
  .led_typing::before, .led_typing::after { content:''; position:absolute; top:50%; width:4px; height:4px; background:#64748b; border-radius:50%; transform:translateY(-50%); animation: b 1s infinite ease-in-out; }
  .led_typing::before { left:6px; animation-delay:0s; }
  .led_typing::after { right:6px; animation-delay:.25s; }
  @keyframes b { 0%,80%,100%{ opacity:.2 } 40%{ opacity:1 } }