:root { --bg:#0f141a; --panel:#0b1015; --border:#1e2a38; --text:#e8f0ff; --muted:#9bb0c9; --accent:#22c55e; --danger:#ef4444; }
*{box-sizing:border-box} body{margin:0;background:var(--bg);color:var(--text);font:15px/1.45 ui-sans-serif,system-ui,Segoe UI,Arial}
#app{display:flex;min-height:100dvh}
aside#left{width:300px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px;gap:14px}
.brand{font-weight:700;letter-spacing:.5px}
.section{display:flex;flex-direction:column;gap:8px}
.section-title{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:12px;text-transform:uppercase}
ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:35vh;overflow:auto}
li{padding:8px;border:1px solid var(--border);border-radius:10px;cursor:pointer}
li.active{outline:2px solid var(--accent)}
.pill{border:1px solid var(--border);background:#0f1a22;color:var(--text);border-radius:999px;padding:4px 10px;cursor:pointer}
.pill.danger{border-color:#3a1a1a;background:#2a1010}
.link{background:none;border:none;color:var(--muted);cursor:pointer}
.footer{margin-top:auto;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:12px}

main#main{flex:1;display:flex;flex-direction:column}
#titlebar{display:flex;gap:8px;align-items:center;justify-content:flex-start;padding:12px;border-bottom:1px solid var(--border)}
#chatTitle{font-weight:600}
#messages{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:75%;padding:10px 12px;border-radius:12px;border:1px solid var(--border)}
.msg.user{align-self:flex-end;background:#14314b}
.msg.assistant{align-self:flex-start;background:#1b2a1b}
.msg.sys{align-self:center;color:var(--muted);font-size:13px}

#composer{display:flex;border-top:1px solid var(--border);gap:8px;padding:10px}
#input{flex:1;min-height:60px;max-height:180px;background:#0b1015;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px}
#sendBtn{background:var(--accent);color:#05150b;border:none;border-radius:10px;padding:10px 14px;cursor:pointer}

dialog{border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:10px;padding:16px;min-width:320px}
dialog input{width:100%;padding:8px;border:1px solid var(--border);background:#091018;color:var(--text);border-radius:8px;margin:4px 0 10px}
dialog .row{display:flex;gap:8px;justify-content:flex-end}