@font-face {
font-family: 'Nexa Light';
src: url('font/Nexa Light.otf');
}
becomes
@font-face{font-family:'Nexa Light';src:url(font/Nexa Light.otf)}
It should be
@font-face{font-family:'Nexa Light';src:url('font/Nexa Light.otf')}
^^^^^^^^^^^^^^^^^^^^^
becomes
It should be