@keyframes breathe {0%{transform:scale(1);}50%{transform:scale(1.05);}100%{transform:scale(1);}}
@keyframes fadeIn {from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
:root{--mca-color:#00bfa5;}
#mca-chat-container{position:fixed;bottom:80px;right:20px;width:320px;max-height:480px;background:#fff;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,0.1);overflow:hidden;display:flex;flex-direction:column;font-family:'Segoe UI',sans-serif;z-index:9999;}
#mca-header{background:var(--mca-color);color:#fff;padding:12px;font-size:16px;}
#mca-body{flex:1;padding:12px;overflow-y:auto;}
#mca-input-area{padding:8px;background:#f7f7f7;}
#mca-input{width:100%;padding:8px;border:1px solid #ccc;border-radius:4px;}
.bot-msg,.user-msg{margin:8px 0;padding:10px 14px;border-radius:10px;max-width:80%;animation:fadeIn .3s ease-out;}
.bot-msg{background:#eef3f8;color:#333;}
.user-msg{background:var(--mca-color);color:#fff;margin-left:auto;}
.mca-menu-btn,#mca-return{width:100%;padding:10px;margin:6px 0;background:#fff;border:2px solid var(--mca-color);color:var(--mca-color);border-radius:8px;cursor:pointer;transition:background .2s,color .2s;}
.mca-menu-btn:hover,#mca-return:hover{background:var(--mca-color);color:#fff;}
#mcp-float-btn{animation:breathe 4s ease-in-out infinite;}