Check out example codes for "css text rotation". It will help you in understanding the concepts better.

Code Example 1

.rotate {

  transform: rotate(-90deg);


  /* Legacy vendor prefixes that you probably don't need... */

  /* Safari */
  -webkit-transform: rotate(-90deg);

  /* Firefox */
  -moz-transform: rotate(-90deg);

  /* IE */
  -ms-transform: rotate(-90deg);

  /* Opera */
  -o-transform: rotate(-90deg);

  /* Internet Explorer */
  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3);

}

Code Example 2

.rotate {

  transform: rotate(-90deg);


  /* Legacy vendor prefixes that you probably don't need... */

  /* Safari */
  -webkit-transform: rotate(-90deg);

  /* Firefox */
  -moz-transform: rotate(-90deg);

  /* IE */
  -ms-transform: rotate(-90deg);

  /* Opera */
  -o-transform: rotate(-90deg);

  /* Internet Explorer */
  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3);

}

Code Example 3

/* Answer to: "css rotate text" */

/*
  If what you are looking for is a way to set type vertically,
  you’re best bet is probably CSS writing-mode, here's a link:
  https://css-tricks.com/almanac/properties/w/writing-mode/

  If you’re just trying to turn some text, you can rotate entire
  elements like this, which rotates it 90 degrees counterclockwise:
*/

.rotate {
  transform: rotate(-90deg);

  /* Legacy vendor prefixes that you probably don't need... */
  /* Safari */
  -webkit-transform: rotate(-90deg);
  /* Firefox */
  -moz-transform: rotate(-90deg);
  /* IE */
  -ms-transform: rotate(-90deg);
  /* Opera */
  -o-transform: rotate(-90deg);
  /* Internet Explorer */
  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3);
}

/* 
  For more information go to:
  https://css-tricks.com/snippets/css/text-rotation/
*/

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