#vestecChatToggle{position:fixed;right:20px;bottom:20px;width:56px;height:56px;border-radius:50%;background:#0073e6;color:#fff;border:none;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.25);font-size:22px;display:flex;align-items:center;justify-content:center;z-index:9999}
@media (prefers-color-scheme: dark){#vestecChatToggle{background:#0a84ff}}
#vestecChatContainer{position:fixed;right:20px;bottom:90px;width:380px;height:560px;background:#fff;color:#111;border-radius:14px;overflow:hidden;box-shadow:0 12px 32px rgba(0,0,0,.35);z-index:9998;visibility:hidden;opacity:0;transition:opacity .25s ease,visibility .25s ease;display:flex;flex-direction:column}
@media (max-width:768px){#vestecChatContainer{width:92vw;height:70vh;right:4vw;bottom:88px}}
@media (prefers-color-scheme: dark){#vestecChatContainer{background:#1e1f22;color:#eaeaea}}
.vc_head{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#0073e6;color:#fff;font-weight:600}
@media (prefers-color-scheme: dark){.vc_head{background:#0a84ff}}
.vc_logo{width:24px;height:24px;object-fit:contain}
.vc_title{flex:1}
.vc_close{background:transparent;border:none;color:#fff;font-size:18px;cursor:pointer}
.vc_body{flex:1;overflow:auto;padding:12px;background:#fafafa}
@media (prefers-color-scheme: dark){.vc_body{background:#121315}}
.msg{background:#fff;border:1px solid #eee;border-radius:10px;padding:8px 10px;margin:6px 0}
@media (prefers-color-scheme: dark){.msg{background:#232428;border-color:#2c2d31}}
.msg.agent{border-left:4px solid #0073e6}
.msg.system{opacity:.8;font-style:italic}
.vc_footer{display:flex;gap:8px;padding:10px;background:#fff;border-top:1px solid #eee}
@media (prefers-color-scheme: dark){.vc_footer{background:#1e1f22;border-color:#2c2d31}}
.vc_input{flex:1;padding:10px;border:1px solid #ddd;border-radius:10px}
.vc_send{background:#0073e6;color:#fff;border:none;border-radius:10px;padding:10px 14px;cursor:pointer}
.vc_escalate{background:#00a36c;color:#fff;border:none;border-radius:10px;padding:10px 14px;cursor:pointer}