:root{--pri: #4f46e5;--pri-d: #4338ca;--bg: #f7f7fb;--bd: #e3e3ee;--tx: #1d1d28;--mut: #6b6b80}*{box-sizing:border-box}html,body{height:100%;margin:0}body{font:14px/1.45 -apple-system,Segoe UI,Roboto,sans-serif;color:var(--tx);background:var(--bg);display:flex;flex-direction:column}.hdr{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:#fff;border-bottom:1px solid var(--bd)}.brand{font-weight:600}.logo{color:var(--pri)}.host{color:var(--mut);font-weight:400;font-size:12px}.icon{border:0;background:none;font-size:16px;cursor:pointer;color:var(--mut)}.settings{display:flex;flex-direction:column;gap:8px;padding:12px;background:#fff;border-bottom:1px solid var(--bd)}.settings label{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--mut)}.settings input,.settings select{padding:7px 9px;border:1px solid var(--bd);border-radius:6px;font-size:13px;color:var(--tx)}.chat{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px}.msg{display:flex}.msg.user{justify-content:flex-end}.bubble{max-width:85%;padding:8px 11px;border-radius:12px;white-space:pre-wrap;word-break:break-word}.msg.user .bubble{background:var(--pri);color:#fff;border-bottom-right-radius:3px}.msg.assistant .bubble{background:#fff;border:1px solid var(--bd);border-bottom-left-radius:3px}.composer{padding:10px 12px;background:#fff;border-top:1px solid var(--bd)}.composer textarea{width:100%;resize:vertical;padding:8px 10px;border:1px solid var(--bd);border-radius:8px;font:inherit}.row{display:flex;gap:8px;margin-top:8px}button.primary,button.ghost{padding:8px 14px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;border:1px solid transparent}button.primary{background:var(--pri);color:#fff}button.primary:hover{background:var(--pri-d)}button.primary.sm{align-self:flex-start;padding:6px 12px}button.ghost{background:#fff;color:var(--pri);border-color:var(--bd)}button:disabled{opacity:.5;cursor:default}.status{margin-top:6px;font-size:12px;color:var(--mut);min-height:16px}.status.err{color:#c0392b}.hidden{display:none!important}