*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:#f5f5f5;font-family:sans-serif}.chat{background:#fff;flex-direction:column;max-width:800px;height:100vh;margin:0 auto;display:flex}.messages{flex-direction:column;flex:1;gap:.75rem;padding:1rem;display:flex;overflow-y:auto}.message{border-radius:8px;max-width:80%;padding:.75rem 1rem}.message.user{white-space:pre-wrap;color:#fff;background:#0070f3;align-self:flex-end}.message.assistant{color:#333;background:#f0f0f0;align-self:flex-start}.input-area{border-top:1px solid #eee;gap:.5rem;padding:1rem;display:flex}.input-area textarea{resize:none;border:1px solid #ddd;border-radius:6px;flex:1;padding:.5rem;font-family:inherit;font-size:1rem}.input-area button{color:#fff;cursor:pointer;background:#0070f3;border:none;border-radius:6px;padding:.5rem 1.25rem;font-size:1rem}.input-area button:disabled{opacity:.5;cursor:not-allowed}.chat-header{background:#fff;border-bottom:1px solid #eee;padding:1rem}.chat-header h1{color:#333;font-size:1.2rem;font-weight:600}.chat-header{justify-content:space-between;align-items:center;display:flex}.reset-btn{cursor:pointer;color:#666;background:0 0;border:1px solid #ddd;border-radius:6px;padding:.3rem .8rem;font-size:.8rem}.reset-btn:hover{background:#f5f5f5}.markdown-body p{margin:0 0 1em}.markdown-body ul,.markdown-body ol{margin:0 0 1em;padding-left:2em}.markdown-body li{margin:.25em 0}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin:1em 0 .5em;font-weight:600}