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//
// Copyright IBM Corp. 2018, 2023
//
// This source code is licensed under the Apache-2.0 license found in the
// LICENSE file in the root directory of this source tree.
//

@use 'sass:meta';
@use 'sass:math';

/// Default font size
/// @type Number
/// @access public
/// @group @carbon/layout
$base-font-size: 16px !default;

/// Convert a given px unit to a rem unit
/// @param {Number} $px - Number with px unit
/// @return {Number} Number with rem unit
/// @access public
/// @group @carbon/layout
@function to-rem($px) {
  @if unit($px) != 'px' {
    @error "Expected argument $px to be of type `px`, instead received: `#{unit($px)}`";
  }

  @return math.div($px, $base-font-size) * 1rem;
}

/// This function causes an error when using sass > 1.65.0
/// Replaced with `to-rem` function
/// @param {Number} $px - Number with px unit
/// @return {Number} Number with rem unit
/// @access public
/// @deprecated
/// @group @carbon/layout
@function rem($px) {
  @if unit($px) != 'px' {
    @error "Expected argument $px to be of type `px`, instead received: `#{unit($px)}`";
  }

  @return math.div($px, $base-font-size) * 1rem;
}

/// Convert a given px unit to a em unit
/// @param {Number} $px - Number with px unit
/// @return {Number} Number with em unit
/// @access public
/// @group @carbon/layout
@function em($px) {
  @if unit($px) != 'px' {
    @error "Expected argument $px to be of type `px`, instead received: `#{unit($px)}`";
  }

  @return math.div($px, $base-font-size) * 1em;
}