CSS Media Query Overriding

Issue

Let me have a class I want to change its style on a certain break-point. Did I have to redefine certain properties which not change on that break-point? Example:

.nf-logo {
  width: 10.4375rem;
  object-fit: contain;
  padding-top: 28px;
}

.login-body > h1 {
  font-size: 4rem;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.1;
  text-align: center;
  font-weight: 600;
}

/*Responsive Design CSS Media Query*/
@media (max-width: 768px) {
  .nf-logo {
    width: 108px;
    object-fit: contain;
    padding-top: 28px;
  }

  .login-body > h1 {
    font-size: 3.125rem;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.1;
    text-align: center;
    font-weight: 400;
  }

  .login-body > h2 {
    font-size: 1.625rem;
    margin: 1rem auto;
    max-width: 640px;
    font-weight: 400;
    text-align: center;
  }
}

/*Is it mandatory to redefine properties of classes which not changing*/

Solution

Did I have to redefine certain properties which not change on that break-point?

No.

If they are defined in a ruleset which:

• has a matching selector
• is not inside a media query that doesn't apply

Then the rule is applied.

There's no need to duplicate it in a different ruleset that applies the same rules.

Answered By - Quentin