제가 사용하고 있는 scss library 파일 입니다.

scss library 파일 공유드립니다. mixin 으로 flexbox 많이 사용하고 animation, transition 등 이용할 때 사용합니다. 사용하지 않은 것까지 포함 시켜놔서 사용하지 않는거 삭제하시고 사용하면 될 거 같습니다.

@charset "utf-8";

$text-color: #333;
$point-color: #3b6ba5;
$point-text-color: #72a5d3;
$point-color-light-blue: #b1d3e3;

/* breakpoints */
$col-xs : 480px;
$col-sm : 768px;
$col-md : 992px;
$col-lg : 1280px;
$col-xl : 1500px;

/* 폰트 적용 */
@font-face {
    font-family: 'NanumSquare';
    src: url(../font/NanumSquareR.eot);
    src: url(../font/NanumSquareR.eot?#iefix) format('embedded-opentype'),
    url(../font/NanumSquareR.woff) format('woff'),
    url(../font/NanumSquareR.ttf) format('truetype');
}

//사용방법 참고 : http://zerosixthree.se/8-sass-mixins-you-must-have-in-your-toolbox/
@function calculateRem($size) {
    $remSize: $size / 16px;
    @return $remSize * 1rem;
}

@mixin font-size($size) {
    font-size: $size;
    font-size: calculateRem($size);
}

@mixin inline-block {
    display: inline-block;
    *zoom: 1;
    *display: inline;
}

@mixin clear-both {
    content: '';
    clear: both;
    display: block;
    height: 0;
}

@mixin clearfix {
    *zoom: 1;
    &:before, &:after {
        content: " ";
        display: table;
    }
    &:after {
        clear: both;
    }
}

@mixin ellipsis($max-width) {
    display: inline-block;
    max-width: $max-width;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@mixin hide-text {
    text-indent: -100%;
    white-space: nowrap;
    overflow: hidden;
    display: block;
}

@mixin visuallyhidden {
    margin: -1px;
    padding: 0;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip: rect(0, 0, 0, 0);
    position: absolute;
}

@mixin text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@mixin opacity($opacity) {
    opacity: $opacity;
    $opacity-ie: $opacity * 100;
    filter: alpha(opacity=$opacity-ie); //IE8
}

@mixin box-sizing($box-model) {
    -webkit-box-sizing: $box-model; // Safari <= 5
    -moz-box-sizing: $box-model; // Firefox <= 19
    box-sizing: $box-model;
}

@mixin bp-large {
    @media only screen and (max-width: 60em) {
        @content;
    }
}

@mixin bp-medium {
    @media only screen and (max-width: 40em) {
        @content;
    }
}

@mixin bp-small {
    @media only screen and (max-width: 30em) {
        @content;
    }
}

@mixin prefix($name, $value) {
    -webkit-#{$name}: $value;
    -moz-#{$name}: $value;
    -ms-#{$name}: $value;
    #{$name}: $value;
}

@mixin prefix-ie($name, $value) {
    -ms-#{$name}: $value;
    #{$name}: $value;
}

@mixin linear-gradient($angle, $color-stops...) {
    $_angle-with-vendor-prefix: "";
    $_angle: "";
    @if $angle == "to top" or $angle == "bottom" {
        $_angle-with-vendor-prefix: bottom;
        $_angle: to top;
    } @else if $angle == "to right" or $angle == "left" {
        $_angle-with-vendor-prefix: left;
        $_angle: to right;
    } @else if $angle == "to bottom" or $angle == "top" {
        $_angle-with-vendor-prefix: top;
        $_angle: to bottom;
    } @else if $angle == "to left" or $angle == "right" {
        $_angle-with-vendor-prefix: right;
        $_angle: to left;
    } @else if $angle == "to top right" or $angle == "bottom left" {
        $_angle-with-vendor-prefix: bottom left;
        $_angle: to top right;
    } @else if $angle == "to bottom right" or $angle == "top left" {
        $_angle-with-vendor-prefix: top left;
        $_angle: to bottom right;
    } @else if $angle == "to bottom left" or $angle == "top right" {
        $_angle-with-vendor-prefix: top right;
        $_angle: to bottom left;
    } @else if $angle == "to top left" or $angle == "bottom right" {
        $_angle-with-vendor-prefix: bottom right;
        $_angle: to top left;
    } @else {
        $_angle-with-vendor-prefix: $angle % 360;
        $_angle: (90 - $angle) % 360;
    }
    background: -webkit-linear-gradient($_angle-with-vendor-prefix, $color-stops);
    background: -moz-linear-gradient($_angle-with-vendor-prefix, $color-stops);
    background: -o-linear-gradient($_angle-with-vendor-prefix, $color-stops);
    background: linear-gradient($_angle, $color-stops);
}

@mixin box-shadow( $horiz : .5em , $vert : .5em , $blur : 0px , $spread : 0px , $color : #000000 ) {
    -webkit-box-shadow: $horiz $vert $blur $spread $color;
    -moz-box-shadow: $horiz $vert $blur $spread $color;
    box-shadow: $horiz $vert $blur $spread $color;
}

@mixin border-radius( $value: 3px ) {
    -webkit-border-radius: $value;
    -moz-border-radius: $value;
    border-radius: $value;

    // keeps background from busting out of border
    -webkit-background-clip: padding-box;
    -moz-background-clip: padding;
    background-clip: padding-box;
}

@mixin border-radius( $value: 3px ) {
    -webkit-border-radius: $value;
    -moz-border-radius: $value;
    border-radius: $value;

    // keeps background from busting out of border
    -webkit-background-clip: padding-box;
    -moz-background-clip: padding;
    background-clip: padding-box;
}

// @param functions : matrix(), translate(), scale(), rotate(), skew()

@mixin transform($type) {
    -webkit-transform: $type;
    -moz-transform: $type;
    -ms-transform: $type;
    transform: $type;
}

// Skew
@mixin skew ($x, $y) {
    @include transform(skew(#{$x}deg, #{$y}deg));
}

@mixin transform-style($type) {
    -webkit-transform-style: $type;
    -moz-transform-style: $type;
    -ms-transform-style: $type;
    transform-style: $type;
}

@mixin perspective($type) {
    -webkit-perspective: $type;
    -moz-perspective: $type;
    -ms-perspective: $type;
    perspective: $type;
}

@mixin matrix ($a, $b, $c, $d, $e, $f) {
    -moz-transform: matrix($a, $b, $c, $d, #{$e}px, #{$f}px);
    -o-transform: matrix($a, $b, $c, $d, $e, $f);
    -ms-transform: matrix($a, $b, $c, $d, $e, $f);
    -webkit-transform: matrix($a, $b, $c, $d, $e, $f);
    transform: matrix($a, $b, $c, $d, $e, $f);
}

//transform origin
@mixin transform-origin ($origin) {
    moz-transform-origin: $origin;
    -o-transform-origin: $origin;
    -ms-transform-origin: $origin;
    -webkit-transform-origin: $origin;
    transform-origin: $origin;
}

/*

@mixin transition($type) {
  -webkit-transition: $type;
  -moz-transition: $type;
  -ms-transition: $type;
  transition: $type;
}
*/

// Usage:   @include transition(width, height 0.3s ease-in-out);
// Output:  -webkit-transition(width 0.2s, height 0.3s ease-in-out);
//          transition(width 0.2s, height 0.3s ease-in-out);
//
// Pass in any number of transitions
@mixin transition($transitions...) {
    $unfoldedTransitions: ();
    @each $transition in $transitions {
        $unfoldedTransitions: append($unfoldedTransitions, unfoldTransition($transition), comma);
    }

    -webkit-transition: $unfoldedTransitions;
    transition: $unfoldedTransitions;
}

@function unfoldTransition ($transition) {
    // Default values
    $property: all;
    $duration: .2s;
    $easing: null; // Browser default is ease, which is what we want
    $delay: null; // Browser default is 0, which is what we want
    $defaultProperties: ($property, $duration, $easing, $delay);

    // Grab transition properties if they exist
    $unfoldedTransition: ();
    @for $i from 1 through length($defaultProperties) {
        $p: null;
        @if $i <= length($transition) {
            $p: nth($transition, $i)
        } @else {
            $p: nth($defaultProperties, $i)
        }
        $unfoldedTransition: append($unfoldedTransition, $p);
    }

    @return $unfoldedTransition;
}

@mixin keyframes($animation-name) {
    @-webkit-keyframes #{$animation-name} {
        @content;
    }
    @-moz-keyframes #{$animation-name} {
        @content;
    }
    @-ms-keyframes #{$animation-name} {
        @content;
    }
    @-o-keyframes #{$animation-name} {
        @content;
    }
    @keyframes #{$animation-name} {
        @content;
    }
}

@mixin animation($str) {
    -webkit-animation: #{$str};
    -moz-animation: #{$str};
    -ms-animation: #{$str};
    -o-animation: #{$str};
    animation: #{$str};
}

// Flexbox display
@mixin flexbox() {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
}

@mixin inline-flex() {
    display: -webkit-inline-box;
    display: -webkit-inline-flex;
    display: -moz-inline-flex;
    display: -ms-inline-flexbox;
    display: inline-flex;
}
// The 'flex' shorthand
// - applies to: flex items
// <positive-number>, initial, auto, or none
@mixin flex($values) {
    -webkit-box-flex: $values;
    -moz-box-flex: $values;
    -webkit-flex: $values;
    -ms-flex: $values;
    flex: $values;
}

// Flex Flow Direction
// - applies to: flex containers
// row | row-reverse | column | column-reverse
@mixin flex-direction($direction) {
    -webkit-flex-direction: $direction;
    -moz-flex-direction: $direction;
    -ms-flex-direction: $direction;
    flex-direction: $direction;
}

// Flex Line Wrapping
// - applies to: flex containers
// nowrap | wrap | wrap-reverse
@mixin flex-wrap($wrap) {
    -webkit-flex-wrap: $wrap;
    -moz-flex-wrap: $wrap;
    -ms-flex-wrap: $wrap;
    flex-wrap: $wrap;
}

// Flex Direction and Wrap
// - applies to: flex containers
// <flex-direction> || <flex-wrap>
@mixin flex-flow($flow) {
    -webkit-flex-flow: $flow;
    -moz-flex-flow: $flow;
    -ms-flex-flow: $flow;
    flex-flow: $flow;
}

// Display Order
// - applies to: flex items
// <integer>
@mixin order($val) {
    -webkit-box-ordinal-group: $val;
    -moz-box-ordinal-group: $val;
    -ms-flex-order: $val;
    -webkit-order: $val;
    order: $val;
}

// Flex grow factor
// - applies to: flex items
// <number>
@mixin flex-grow($grow) {
    -webkit-flex-grow: $grow;
    -moz-flex-grow: $grow;
    -ms-flex-grow: $grow;
    flex-grow: $grow;
}

// Flex shrink
// - applies to: flex item shrink factor
// <number>
@mixin flex-shrink($shrink) {
    -webkit-flex-shrink: $shrink;
    -moz-flex-shrink: $shrink;
    -ms-flex-shrink: $shrink;
    flex-shrink: $shrink;
}

// Flex basis
// - the initial main size of the flex item
// - applies to: flex itemsnitial main size of the flex item
// <width>
@mixin flex-basis($width) {
    -webkit-flex-basis: $width;
    -moz-flex-basis: $width;
    -ms-flex-basis: $width;
    flex-basis: $width;
}

// Axis Alignment
// - applies to: flex containers
// flex-start | flex-end | center | space-between | space-around
@mixin justify-content($justify) {
    -webkit-justify-content: $justify;
    -moz-justify-content: $justify;
    -ms-justify-content: $justify;
    justify-content: $justify;
    -ms-flex-pack: $justify;
}

// Packing Flex Lines
// - applies to: multi-line flex containers
// flex-start | flex-end | center | space-between | space-around | stretch
@mixin align-content($align) {
    -webkit-align-content: $align;
    -moz-align-content: $align;
    -ms-align-content: $align;
    align-content: $align;
}

// Cross-axis Alignment
// - applies to: flex containers
// flex-start | flex-end | center | baseline | stretch
@mixin align-items($align) {
    -webkit-align-items: $align;
    -moz-align-items: $align;
    -ms-align-items: $align;
    align-items: $align;
}

// Cross-axis Alignment
// - applies to: flex items
// auto | flex-start | flex-end | center | baseline | stretch
@mixin align-self($align) {
    -webkit-align-self: $align;
    -moz-align-self: $align;
    -ms-align-self: $align;
    align-self: $align;
}

// grayscale      ex: filter: grayscale(100%);
// blur           ex: filter: blur(2px);
@mixin filter($filter-type,$filter-amount) {
    -webkit-filter: $filter-type+unquote('(#{$filter-amount})');
    -moz-filter: $filter-type+unquote('(#{$filter-amount})');
    -ms-filter: $filter-type+unquote('(#{$filter-amount})');
    -o-filter: $filter-type+unquote('(#{$filter-amount})');
    filter: $filter-type+unquote('(#{$filter-amount})');
}