:root{--bg:#f6f7f9;--panel:#fff;--line:#d8dde5;--text:#20242a;--muted:#6b7280;--primary:#1769e0;--danger:#b42318}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}button,.button{border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px 12px;cursor:pointer}button.primary,.button.primary{background:var(--primary);border-color:var(--primary);color:white}button:disabled{opacity:.6;cursor:wait}
.topbar{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:#fff;border-bottom:1px solid var(--line)}.brand{font-weight:700;font-size:18px}.topbar nav{display:flex;gap:14px;align-items:center}.topbar form{margin:0}
.workspace{position:fixed;top:56px;right:0;bottom:0;left:0;display:grid;grid-template-columns:220px 260px 1fr;overflow:hidden}.package-column,.conversation-column{height:100%;border-right:1px solid var(--line);background:#fff;padding:14px;overflow:auto}.chat-column{height:100%;display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden}.column-head,.page-head{display:flex;align-items:center;justify-content:space-between;gap:12px}h1,h2{margin:0 0 14px}h2{font-size:15px}.list-item{display:block;width:100%;text-align:left;padding:10px;border:1px solid transparent;border-radius:6px;margin-bottom:8px;background:transparent}.list-item strong{display:block}.list-item span{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.list-item.active,.conversation-item.active{background:#eef5ff;border-color:#bad5ff}.rename-conversation{position:absolute;right:8px;top:8px;font-size:12px;color:var(--muted);font-style:normal;display:none}.conversation-item{position:relative;padding-right:48px}.conversation-item:hover .rename-conversation{display:block}
.messages{flex:1 1 auto;min-height:0;overflow-y:auto;overflow-x:hidden;padding:18px;background:#edf1f5}.message-row{display:flex;margin:0 0 12px}.message-row.user{justify-content:flex-start}.message-row.assistant{justify-content:flex-end}.message{max-width:min(72%,760px);padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.04);word-break:break-word;overflow-wrap:anywhere}.message-row.assistant .message{background:#dff4cf;border-color:#c6e8b2}.messages>.message{display:block;margin-bottom:12px}.messages>.message.user{margin-right:auto;margin-left:0;background:#fff;border-left:0}.messages>.message.assistant{margin-left:auto;margin-right:0;background:#dff4cf;border-color:#c6e8b2;border-left:0}.message small{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}.message-text{white-space:pre-wrap}.empty{color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:6px;padding:12px}
.composer{flex:0 0 auto;border-top:1px solid var(--line);background:#fff;padding:12px;display:grid;grid-template-columns:1fr auto;gap:10px}.composer .modes{grid-column:1/-1;display:flex;gap:18px}.composer textarea{min-height:88px;max-height:180px;resize:vertical}
.generation{flex:0 0 auto;border-top:1px solid var(--line);background:#fbfcff;padding:12px}.generation textarea{width:100%;min-height:92px;max-height:180px}.generation .actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.meta{color:var(--muted);margin-top:6px}.hidden{display:none}
.page{padding:24px;max-width:1180px;margin:0 auto}.page.narrow{max-width:760px}.muted{color:var(--muted);margin:4px 0 0}.knowledge-layout{display:grid;grid-template-columns:260px 1fr;gap:18px;align-items:start}.knowledge-nav{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px}.knowledge-nav-item{display:block;padding:10px;border-radius:6px;margin-bottom:4px}.knowledge-nav-item strong,.knowledge-nav-item span{display:block}.knowledge-nav-item span{font-size:12px;color:var(--muted)}.knowledge-nav-item.active{background:#eef5ff;color:#0f4ca8}.knowledge-content{min-width:0}.form,.filters,.category-create{display:grid;gap:14px}.filters{grid-template-columns:1fr 180px auto;margin-bottom:14px}.category-create{grid-template-columns:1fr auto;margin-bottom:12px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px}.category-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.category-list form{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px 8px}.category-list button{padding:3px 7px;color:var(--danger)}.form label,.provider-grid label{display:grid;gap:6px}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:6px;padding:9px;background:#fff;font:inherit}.check{display:flex!important;align-items:center;gap:8px}.check input{width:auto}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line)}th,td{text-align:left;border-bottom:1px solid var(--line);padding:10px;vertical-align:top}th{background:#f2f4f7}.provider-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}.provider-grid fieldset{border:1px solid var(--line);border-radius:8px;background:#fff;display:grid;gap:10px}.provider-grid button{grid-column:1/-1}.toast{position:fixed;right:18px;bottom:18px;background:#111827;color:#fff;padding:10px 14px;border-radius:6px;opacity:0;transition:.2s}.toast.show{opacity:1}.guest{display:grid;place-items:center;min-height:100vh}.login-panel{width:min(380px,calc(100vw - 32px));background:#fff;border:1px solid var(--line);border-radius:8px;padding:24px;display:grid;gap:14px}.error{color:var(--danger)}.profile{white-space:pre-wrap;background:#fff;border:1px solid var(--line);padding:16px;border-radius:6px}
@media (max-width: 860px){.workspace{position:static;height:auto;min-height:calc(100vh - 96px);grid-template-columns:1fr;overflow:visible}.package-column,.conversation-column{height:auto;max-height:220px;border-right:0;border-bottom:1px solid var(--line)}.chat-column{height:calc(100vh - 96px);min-height:560px}.topbar{height:auto;align-items:flex-start;gap:10px;padding:12px;flex-direction:column}.topbar nav{flex-wrap:wrap}.composer{grid-template-columns:1fr}.message{max-width:86%}.knowledge-layout,.filters{grid-template-columns:1fr}}