.edu-ai-widget{position:fixed;right:18px;bottom:18px;z-index:9999;font-family:Arial,Helvetica,sans-serif}
.edu-ai-toggle{width:56px;height:56px;border-radius:50%;background:#0a7aff;color:#fff;border:none;box-shadow:0 8px 24px rgba(10,122,255,.2);cursor:pointer}
.edu-ai-panel{width:320px;height:420px;background:#fff;border-radius:12px;box-shadow:0 20px 40px rgba(0,0,0,.15);overflow:hidden;display:flex;flex-direction:column;margin-top:8px}
.edu-ai-panel[aria-hidden="true"]{display:none}
.edu-ai-header{padding:12px 16px;background:#0a7aff;color:#fff;font-weight:600}
.edu-ai-messages{flex:1;padding:12px;overflow:auto;background:#f7f9fc}
.edu-ai-msg{margin:6px 0;padding:8px 12px;border-radius:10px;max-width:85%}
.edu-ai-msg.user{background:#0a7aff;color:#fff;margin-left:auto}
.edu-ai-msg.assistant{background:#fff;border:1px solid #e6eef9}
.edu-ai-form{display:flex;border-top:1px solid #eee;padding:8px}
.edu-ai-form input{flex:1;padding:10px;border-radius:8px;border:1px solid #dfeaf7;margin-right:8px}
.edu-ai-form button{background:#0a7aff;color:white;border:none;padding:8px 12px;border-radius:8px;cursor:pointer}