#main-part {
  padding: 15px 35px 0;
  margin-top: 50px;
}

#logo {
  width: auto;
  height: 40px;
}

#main-part {
  padding: $spacer ($spacer * 2) 0;
  margin-top: 50px;
}

#logo {
  width: auto;
  height: 40px;
}

Use Boostrap $spacer for layout padding.
Use Boostrap $spacer for layout padding.
