:root{ --bg:#0f172a; --panel:#111827; --muted:#9ca3af; --text:#f3f4f6; --accent:#22c55e; --border:#1f2937;}
*{box-sizing:border-box} body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Roboto,Arial}
.container{max-width:1000px;margin:0 auto;padding:16px}
.topbar{border-bottom:1px solid var(--border);background:#0b1022}
.brand{font-weight:700}
.row{display:flex;align-items:center;justify-content:space-between}
.gap>*+*{margin-left:12px}
a{color:var(--text);text-decoration:none;opacity:.9}
a:hover{opacity:1}
.card{background:#0b1224;border:1px solid var(--border);border-radius:12px;padding:16px;margin:16px 0}
.input, textarea, select{width:100%;padding:10px;border-radius:8px;border:1px solid var(--border);background:#0b1022;color:#e5e7eb}
.btn{background:#111827;color:#fff;border:1px solid var(--border);padding:10px 12px;border-radius:8px;cursor:pointer}
.btn.primary{background:var(--accent);color:#041309;border:none}
.grid{display:grid;grid-template-columns:260px 1fr;gap:16px}
.list{background:#0b1022;border:1px solid var(--border);border-radius:12px;padding:8px;max-height:70vh;overflow:auto}
.list-item{padding:10px;border-radius:8px;cursor:pointer;border:1px solid transparent}
.list-item:hover{background:#0f1a34;border-color:#1d2a4d}
.list-item.active{background:#0f1a34;border-color:#1d2a4d}
.small{font-size:12px;color:var(--muted)}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.messages{background:#0b1022;border:1px solid var(--border);border-radius:12px;padding:12px;min-height:50vh;max-height:70vh;overflow:auto;display:flex;flex-direction:column;gap:12px}
.msg{display:flex;gap:10px}
.bubble{background:#0b1224;border:1px solid var(--border);border-radius:12px;padding:10px 12px;white-space:pre-wrap;line-height:1.5;max-width:800px}
.msg.user .bubble{background:#13213a}
.composer{display:flex;gap:8px;margin-top:8px}
.center{text-align:center;opacity:.8;margin-top:16px}
.alert{padding:10px;border-radius:8px;background:#13213a;border:1px solid #1d2a4d}