Hi, you should use classes to attach css styles to html elements.
<p class="fontSize-m fontWeight-3 fontColor-slate hoverFontColor-black">Text</p>
<style>
/* Font Size Classes */
.fontSize-xxxxl{font-size:46px;}
.fontSize-xxxl{font-size:38px;}
.fontSize-xxl{font-size:28px;}
.fontSize-xl{font-size:20px;}
.fontSize-l{font-size:18px;}
.fontSize-m{font-size:16px;}
.fontSize-s{font-size:14px;}
.fontSize-xs{font-size:12px;}
.fontSize-xxs{font-size:10px;}
/* Font Weight Classes */
.fontWeight-3{font-family:FaktSoftPro Medium;}
.fontWeight-2{font-family:FaktSoftPro Normal;}
.fontWeight-1{font-family:FaktSoftPro Blond;}
/* Font Color Classes */
.fontColor-black{color:#1F2D3D;}
.fontColor-steel{color:#273444;}
.fontColor-slate{color:#3C4858;}
.fontColor-coal{color:#606E82;}
.fontColor-silver{color:#8492A6;}
.fontColor-rock{color:#93A7C3;}
.fontColor-ash{color:#C0CCDA;}
.fontColor-white{color:#FFFFFF;}
.fontColor-sea{color:#4F82C9;}
.fontColor-calm{color:#526E95;}
.fontColor-rain{color:#435E85;}
.fontColor-storm{color:#304A6E;}
.fontColor-pink{color:#FF1DA3;}
.fontColor-purple{color:#A11DFF;}
.fontColor-leaf{color:#8CCBB4;}
.fontColor-blue{color:#20B6FF;}
.fontColor-general{color:#1FB6FF;}
.hoverFontColor-general:hover{color:#19ADF4;}
.hoverFontColor-pink:hover{color:#E1198F;}
.hoverFontColor-purple:hover{color:#961BEF;}
.hoverFontColor-silver:hover{color:#606E82;}
.hoverFontColor-black:hover{color:#1F2D3D;}
/* Background Color Classes */
.backgroundColor-white{background-color:#FFFFFF;}
.backgroundColor-blue{background-color:#20B6FF;}
.backgroundColor-black{background-color:#1F2D3D;}
/* Border Color Classes */
.borderColor-hail{border-color:#E5E9F2;border-style: solid;border-width: 1px;}
/* Text Alignment Classes */
.textAlign-left{text-align: left;}
.textAlign-center{text-align: center;}
.textAlign-right{text-align: right;}
/* Text Transformation Classes */
.textTransform-lowercase{text-transform: lowercase;}
.textTransform-uppercase{text-transform: uppercase;}
.textTransform-capitalize{text-transform: capitalize;}
/* Text Decoration Class */
.underline {text-decoration:underline;}
.hoverunderline:hover {text-decoration:underline;}
.linethrough{text-decoration:line-through;}
/* Line Height Classes */
.lineHeight-xl{line-height:1.8;}
.lineHeight-l{line-height:1.6;}
.lineHeight-m{line-height:1.4;}
.lineHeight-s{line-height:1.2;}
.lineHeight-xs{line-height:1;}
/* Opacity Classes */
.opacity-none{opacity:0;}
.opacity-l{opacity:0.3;}
.opacity-m{opacity:0.5;}
.opacity-s{opacity:0.8;}
.opacity-xs{opacity:0.9;}
._opacity-none{opacity:0;}
/* Pointer Event Classes */
.pointer-all{pointer-events:all;}
.pointer-none{pointer-events:none;}
._pointer-none{pointer-events:none;}
/* Cursor Classes */
.cursor-pointer{cursor: pointer;}
.cursor-text{cursor:text;}
.cursor-default{cursor:default;}
/* Uniform Border radius Classes */
.borderRadius-circle{border-radius:100%;}
.borderRadius-xxxl{border-radius:32px;}
.borderRadius-xxl{border-radius:16px;}
.borderRadius-xl{border-radius:12px;}
.borderRadius-l{border-radius:8px;}
.borderRadius-m{border-radius:6px;}
.borderRadius-s{border-radius:4px;}
.borderRadius-xs{border-radius:3px;}
.borderRadius-xxs{border-radius:2px;}
.borderRadius-xxxs{border-radius:1px;}
/* Unequal Border Radius Classes */
.borderRadiusTopLeft-xs{border-radius: 2px 0px 0px 0px;}
.borderRadiusTopRight-xs{border-radius: 0px 2px 0px 0px;}
.borderRadiusBottomLeft-xs{border-radius: 0px 0px 2px 0px;}
.borderRadiusBottomRight-xs{border-radius: 0px 0px 0px 2px;}
.borderRadiusTopLeft-s{border-radius: 4px 0px 0px 0px;}
.borderRadiusTopRight-s{border-radius: 0px 4px 0px 0px;}
.borderRadiusBottomLeft-s{border-radius: 0px 0px 4px 0px;}
.borderRadiusBottomRight-s{border-radius: 0px 0px 0px 4px;}
.borderRadiusTopLeft-m{border-radius: 6px 0px 0px 0px;}
.borderRadiusTopRight-m{border-radius: 0px 6px 0px 0px;}
.borderRadiusBottomLeft-m{border-radius: 0px 0px 6px 0px;}
.borderRadiusBottomRight-m{border-radius: 0px 0px 0px 6px;}
.borderRadiusTopLeft-l{border-radius: 9px 0px 0px 0px;}
.borderRadiusTopRight-l{border-radius: 0px 9px 0px 0px;}
.borderRadiusBottomLeft-l{border-radius: 0px 0px 9px 0px;}
.borderRadiusBottomRight-l{border-radius: 0px 0px 0px 9px;}
.borderRadiusTopLeft-xl{border-radius: 12px 0px 0px 0px;}
.borderRadiusTopRight-xl{border-radius: 0px 12px 0px 0px;}
.borderRadiusBottomLeft-xl{border-radius: 0px 0px 12px 0px;}
.borderRadiusBottomRight-xl{border-radius: 0px 0px 0px 12px;}
/* Perspective Shadow Classes */
._boxShadow-distant { box-shadow: 0px 1px 7px 0px rgba(0, 0, 0, 0.06);}
.boxShadow-close { box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.12);}
.boxShadow-subtle {box-shadow: 0px 0px 3px 0px rgba(0, 0, 0, 0.20);}
/* 3d Shadow Classes */
.boxShadow-emboss {
box-shadow: inset 0 -3px 0 0 rgba(0,0,0,0.10);
}
.boxShadow-deboss {
box-shadow: inset 0 3px 0 0 rgba(0,0,0,0.10);
}
.boxShadow-raise {
box-shadow: 0 1px 1px 0 rgba(0,0,0,0.06);
}
.boxShadow-depress {
box-shadow: inset 0 2px 2px 0 rgba(0,0,0,0.03);
}
/* Hover Shadow Classes */
.boxShadow-emboss-hover:hover {
box-shadow: inset 0 -3px 0 0 rgba(0,0,0,0.10);
}
.boxShadow-deboss-hover:hover {
box-shadow: inset 0 3px 0 0 rgba(0,0,0,0.10);
}
.boxShadow-raise-hover:hover {
box-shadow: 0 1px 1px 0 rgba(0,0,0,0.06);
}
.boxShadow-distant-hover:hover {
box-shadow: 0 1px 7px 0 rgba(0,0,0,0.06);
}
/* Button Size Classes */
.button-xl {
font-size:16px;
font-family:FaktSoftPro Medium;
padding-left: 20px;
padding-right: 20px;
padding-top: 17px;
padding-bottom: 15px;
height: 50px;
border-radius: 6px;
display: inline-block;
vertical-align: middle;
text-transform: capitalize;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-user-drag: none;
-khtml-user-drag: none;
-moz-user-drag: none;
-o-user-drag: none;
user-drag: none;
pointer-events:all;
}
.button-l {
font-size:14px;
font-family:FaktSoftPro Medium;
padding-left: 15px;
padding-right: 15px;
padding-top: 12px;
padding-bottom: 13px;
height: 40px;
border-radius: 4px;
display: inline-block;
vertical-align: middle;
text-transform: capitalize;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-user-drag: none;
-khtml-user-drag: none;
-moz-user-drag: none;
-o-user-drag: none;
user-drag: none;
pointer-events:all;
}
.button-m {
font-size:14px;
font-family:FaktSoftPro Medium;
padding-left: 15px;
padding-right: 15px;
padding-top: 10px;
padding-bottom: 12px;
height: 35px;
border-radius: 4px;
display: inline-block;
vertical-align: middle;
text-transform: capitalize;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-user-drag: none;
-khtml-user-drag: none;
-moz-user-drag: none;
-o-user-drag: none;
user-drag: none;
pointer-events:all;
}
.button-s {
font-size:14px;
font-family:FaktSoftPro Medium;
padding-left: 15px;
padding-right: 15px;
padding-top: 7px;
padding-bottom: 12px;
height: 30px;
border-radius: 4px;
display: inline-block;
vertical-align: middle;
text-transform: capitalize;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-user-drag: none;
-khtml-user-drag: none;
-moz-user-drag: none;
-o-user-drag: none;
user-drag: none;
pointer-events:all;
}
.button-xs {
font-size:12px;
font-family:FaktSoftPro Medium;
padding-left: 12px;
padding-right: 12px;
padding-top: 6px;
padding-bottom: 12px;
height: 25px;
border-radius: 3px;
display: inline-block;
vertical-align: middle;
text-transform: capitalize;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-user-drag: none;
-khtml-user-drag: none;
-moz-user-drag: none;
-o-user-drag: none;
user-drag: none;
pointer-events:all;
}
/* Flat Button Classes */
.flatButton-general {
color:#ffffff;
background-color: #1FB6FF;
border-color: #1FB6FF;
border-style: solid;
border-width: 1px;
}
.flatButton-general:hover {
background-color: #19ADF4;
border-color: #19ADF4;
}
.flatButton-positive {
color:#ffffff;
background-color: #00D95F;
border-color: #00D95F;
border-style: solid;
border-width: 1px;
}
.flatButton-positive:hover {
background-color: #11C360;
border-color: #11C360;
}
.flatButton-white {
color:#3C4858;
background-color: #ffffff;
border-color: #E5E9F2;
border-style: solid;
border-width: 1px;
}
.flatButton-white:hover {
box-shadow: inset 0 -3px 0 0 rgba(0,0,0,0.10);
}
/* Ghost Button Classes */
.ghostButton-general {
color:#3C4858;
background-color: #ffffff;
border-color: #E5E9F2;
border-style: solid;
border-width: 1px;
}
.ghostButton-orange {
color:#3C4858;
background-color: #ffffff;
border-color: #E5E9F2;
border-style: solid;
border-width: 1px;
}
.ghostButton-positive {
color:#3C4858;
background-color: #ffffff;
border-color: #E5E9F2;
border-style: solid;
border-width: 1px;
}
.ghostButton-negative {
color:#3C4858;
background-color: #ffffff;
border-color: #E5E9F2;
border-style: solid;
border-width: 1px;
}
.ghostButton-general:hover {
color:#ffffff;
background-color: #1FB6FF;
border-color: #1FB6FF;
}
.ghostButton-orange:hover {
color:#ffffff;
background-color: #FFC82C;
border-color: #FFC82C;
}
.ghostButton-positive:hover {
color:#ffffff;
background-color: #00D95F;
border-color: #00D95F;
}
.ghostButton-negative:hover {
color:#ffffff;
background-color: #FF4949;
border-color: #FF4949;
}
/* Dark Ghost Button Classes */
.darkGhostButton-white {
color:#ffffff;
background-color: #273444;
border-color: #ffffff;
border-style: solid;
border-width: 1px;
}
.darkGhostButton-general {
color:#ffffff;
background-color: #273444;
border-color: #ffffff;
border-style: solid;
border-width: 1px;
}
.darkGhostButton-orange {
color:#ffffff;
background-color: #273444;
border-color: #ffffff;
border-style: solid;
border-width: 1px;
}
.darkGhostButton-positive {
color:#ffffff;
background-color: #273444;
border-color: #ffffff;
border-style: solid;
border-width: 1px;
}
.darkGhostButton-negative {
color:#ffffff;
background-color: #273444;
border-color: #ffffff;
border-style: solid;
border-width: 1px;
}
.darkGhostButton-white:hover {
color:#3C4858;
background-color: #ffffff;
border-color: #ffffff;
}
.darkGhostButton-general:hover {
color:#ffffff;
background-color: #1FB6FF;
border-color: #1FB6FF;
}
.darkGhostButton-orange:hover {
color:#ffffff;
background-color: #FFC82C;
border-color: #FFC82C;
}
.darkGhostButton-positive:hover {
color:#ffffff;
background-color: #00D95F;
border-color: #00D95F;
}
.darkGhostButton-negative:hover {
color:#ffffff;
background-color: #FF4949;
border-color: #FF4949;
}
/* Disabled Button Classes */
.disabledLight {
color:#8492A6 !important;
background-color: #F9FAFC !important;
border-color: #E5E9F2 !important;
pointer-events: none !important;
}
.disabledDark {
color:#C0CCDA !important;
background-color: #273444 !important;
border-color: #E5E9F2 !important;
pointer-events: none !important;
}
/* Placeholder color */
::placeholder {
color: #C0CCDA !important;
opacity: 1; /* Firefox */
}
:-ms-input-placeholder { /* Internet Explorer 10-11 */
color: #C0CCDA !important;
}
::-ms-input-placeholder { /* Microsoft Edge */
color: #C0CCDA !important;
}
/* Disabled input */
input[disabled], textarea[disabled],
select[disabled='disabled']{
-webkit-text-fill-color: rgba(132, 146, 166, 1);
-webkit-opacity: 1;
color: rgba(132, 146, 166, 1);
}
.disabledInput {
background-color: #F9FAFC !important;
}
/* Animation timing Classes */
.transitionDuration-xs {transition: 0.1s;}
.transitionDuration-s {transition: 0.2s;}
.transitionDuration-m {transition: 0.3s;}
.transitionDuration-l {transition: 0.4s;}
.transitionDuration-xl {transition: 0.5s;}
/* Animation Easing */
.transitionTimingFunction-linear {transition-timing-function: linear;}
.transitionTimingFunction-ease {transition-timing-function: ease;}
.transitionTimingFunction-cb--scaleIn {transition-timing-function: ease-in;}
.transitionTimingFunction-cb--scaleOut {transition-timing-function: ease-out;}
.transitionTimingFunction-cb--scaleUp {transition-timing-function: cubic-bezier(0,2,0,0.5);}
/* Animation Classes */
.animation--rotate-180 { transform:rotate(180deg); -webkit-transform:rotate(180deg); -moz-transform:rotate(180deg); -o-transform:rotate(180deg); }
/* Display Classes */
.display-ib{display:inline-block;}
.display-if{display:inline-flex;}
/* Float Classes */
float-left{float:left;}
float-right{ float:right;}
/* Alignment Classes */
.verticalAlign{ vertical-align: middle;}
/* Dynamic Classes */
.dynamicSize{display:inline-flex;-webkit-box-align;justify-content:center;align-items:center;position:absolute;}
/* Rotation classes */
._dragRotate-left {
-ms-transform: rotate(-3deg);
-webkit-transform: rotate(-3deg);
transform: rotate(-3deg);
}
._dragRotate-right {
-ms-transform: rotate(3deg);
-webkit-transform: rotate(3deg);
transform: rotate(3deg);
}
/* Object Fit classes */
.objectFit-fill {object-fit: fill;}
.objectFit-contain {object-fit: contain;}
.objectFit-cover {object-fit: cover;}
.objectFit-scale {object-fit: scale-down;}
.objectFit-none {object-fit: none;}
</style>