Priority css selector - css selector [World]

1. For the calculation of the priority, the numerical notation:
   each segment selector css statement corresponds to a specific numerical value, the larger the value, the higher the priority, wherein the priority css statement is rendered.
   Wherein: the emergence of a selector 0, +0 priority value;
   appears a selector stage, the priority value +;
   appear selector level 2 priority value +10;
   developed grade 3 a selector priority Numerical +100;