css margin top

.yourClass {
  margin-top: 25px;
}

.yourClass {
  margin-bottom: 25px;
}

p {
    margin: 25px 50px 75px 100px; /* Top, Right, Bottom, Left */
} 

p {
  margin-top: 100px;

  margin-bottom: 100px;

  margin-right: 150px;

  margin-left: 80px;
} 

subject {
  margin-top: /*the size of the margin */ (example: 100px)
  /* or */
  margin-bottom: /*the size of the margin */ (example: 100px)
}

margin: 25px 50px;