#cb-burbuja {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #2f6f4f;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
    z-index: 9999;
}

#cb-ventana {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 320px;
    max-height: 480px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 9999;
    font-family: Arial, sans-serif;
}

#cb-ventana.cb-abierto {
    display: flex;
}

#cb-header {
    background: #2f6f4f;
    color: #fff;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: bold;
}

#cb-mensajes {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    background: #f5f5f0;
}

.cb-burbuja-msg {
    background: #fff;
    border-radius: 8px;
    padding: 8px 12px;
    margin-bottom: 10px;
    font-size: 13px;
    line-height: 1.4;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.cb-opcion {
    display: block;
    width: 100%;
    text-align: left;
    background: #fff;
    border: 1px solid #2f6f4f;
    color: #2f6f4f;
    border-radius: 8px;
    padding: 8px 10px;
    margin-bottom: 6px;
    font-size: 13px;
    cursor: pointer;
}

.cb-opcion:hover {
    background: #2f6f4f;
    color: #fff;
}

.cb-opcion-volver {
    border-color: #999;
    color: #666;
}

.cb-opcion-asesor {
    border-color: #c77;
    color: #c33;
}