*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%}.llm-layout{height:100vh;display:flex;overflow:hidden}.llm-layout__sidebar{background:#f7f8fa;border-right:1px solid #e8e8e8;flex-direction:column;width:260px;min-width:260px;display:flex;overflow-y:auto}.llm-layout__main{flex-direction:column;flex:1;display:flex;overflow:hidden}.llm-layout__chat{background:#fafafa;border-left:1px solid #e8e8e8;flex-direction:column;width:360px;min-width:360px;display:flex}.sidebar-header{border-bottom:1px solid #e8e8e8;padding:20px 16px 12px}.sidebar-nav{flex:1;padding:8px 0}.sidebar-nav-item{cursor:pointer;color:#333;align-items:center;gap:10px;padding:10px 16px;font-size:14px;transition:background .15s;display:flex}.sidebar-nav-item:hover{background:#e8e8e8}.sidebar-nav-item--active{color:#1677ff;background:#e6f4ff;font-weight:500}.sidebar-footer{color:#999;border-top:1px solid #e8e8e8;padding:12px 16px;font-size:12px}.main-header{background:#fff;border-bottom:1px solid #e8e8e8;padding:16px 24px}.main-content{background:#fff;flex:1;padding:24px;overflow-y:auto}.chat-header{border-bottom:1px solid #e8e8e8;padding:16px;font-weight:500}.chat-messages{flex-direction:column;flex:1;gap:12px;padding:16px;display:flex;overflow-y:auto}.chat-message{border-radius:12px;max-width:85%;padding:10px 14px;font-size:14px;line-height:1.5}.chat-message--user{color:#fff;background:#1677ff;border-bottom-right-radius:4px;align-self:flex-end}.chat-message--assistant{color:#333;background:#f0f0f0;border-bottom-left-radius:4px;align-self:flex-start}.chat-input-bar{background:#fff;border-top:1px solid #e8e8e8;gap:8px;padding:12px 16px;display:flex}.chat-input-bar input{border:1px solid #d9d9d9;border-radius:6px;outline:none;flex:1;padding:8px 12px;font-size:14px}.chat-input-bar input:focus{border-color:#1677ff;box-shadow:0 0 0 2px #1677ff1a}