:root{--fondo:#0f1115;--panel:#171a21;--borde:#262b36;--texto:#e6e8ee;--tenue:#939aab;--acento:#4f8cff;--acento-suave:#1e2a44}*{box-sizing:border-box}html,body{background:var(--fondo);height:100%;color:var(--texto);margin:0;padding:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.55}a{color:var(--acento)}.contenedor{flex-direction:column;max-width:900px;height:100vh;margin:0 auto;display:flex}.cabecera{border-bottom:1px solid var(--borde);justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.marca{align-items:center;gap:10px;font-weight:600;display:flex}.marca small{color:var(--tenue);font-weight:400}.hilo{flex-direction:column;flex:1;gap:18px;padding:20px 18px;display:flex;overflow-y:auto}.msg{gap:12px;display:flex}.msg .avatar{background:var(--acento-suave);height:28px;color:var(--acento);border-radius:6px;flex:0 0 28px;place-items:center;font-size:12px;font-weight:700;display:grid}.msg.usuario .avatar{color:var(--tenue);background:#2a2f3a}.msg .cuerpo{flex:1;min-width:0}.msg .cuerpo>:first-child{margin-top:0}.msg .cuerpo>:last-child{margin-bottom:0}.cuerpo table{border-collapse:collapse;width:100%;margin:10px 0;font-size:14px}.cuerpo th,.cuerpo td{border:1px solid var(--borde);text-align:left;padding:6px 10px}.cuerpo th{background:var(--panel);font-weight:600}.cuerpo code{background:var(--panel);border-radius:4px;padding:1px 5px;font-size:13px}.cuerpo pre{background:var(--panel);border:1px solid var(--borde);border-radius:8px;padding:12px;overflow-x:auto}.herramientas{color:var(--tenue);flex-wrap:wrap;gap:6px;margin-bottom:6px;font-size:12px;display:flex}.chip{background:var(--panel);border:1px solid var(--borde);border-radius:999px;padding:1px 9px}.entrada{border-top:1px solid var(--borde);padding:14px 18px 18px}.caja{background:var(--panel);border:1px solid var(--borde);border-radius:12px;align-items:flex-end;gap:10px;padding:10px 12px;display:flex}.caja:focus-within{border-color:var(--acento)}.caja textarea{resize:none;color:var(--texto);font:inherit;background:0 0;border:0;outline:0;flex:1;max-height:180px}.caja button{background:var(--acento);color:#fff;cursor:pointer;border:0;border-radius:8px;padding:8px 14px;font-weight:600}.caja button:disabled{opacity:.45;cursor:not-allowed}.pie{color:var(--tenue);text-align:center;margin-top:8px;font-size:12px}.error{color:#ffbcbc;background:#3a1d1d;border:1px solid #6b2b2b;border-radius:8px;padding:10px 12px;font-size:14px}.sugerencias{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.sugerencias button{background:var(--panel);border:1px solid var(--borde);color:var(--texto);cursor:pointer;border-radius:999px;padding:6px 14px;font-size:13px}.sugerencias button:hover{border-color:var(--acento)}.vacio{color:var(--tenue);text-align:center;margin-top:12vh}.vacio h1{color:var(--texto);margin-bottom:6px;font-size:22px}.puntos:after{content:"";animation:1.4s steps(4,end) infinite puntos}@keyframes puntos{0%{content:""}25%{content:"."}50%{content:".."}75%{content:"..."}}