Антон Спирин

.btn {
    background-image: url(../img/btn.png);
    background-position: 0 0;
    width: 478px;
    height: 152px;
    display: inline-block;
    position: absolute;
    top: 160px;
    left: 0;
    font-size: 20px;
    color: #fff;
    text-shadow: 0 1px 0 rgba(0,0,0,0.53);
    text-align: center;
    line-height: 150px;
}
.btn:hover {
    background-position: 0 -155px;
    padding-top: 2px;
}
.btn:before {
    content: '';
    position: absolute;
    top: 50px;
    right: 40px;
    bottom: 50px;
    left: 40px;
    border: 6px solid transparent;
    border-radius: 50px;
    animation-duration: 1s;
}
.btn:hover:before, .btn:focus:before, .btn:active:before {
    animation-name: hvr-ripple-out;
}
@keyframes hvr-ripple-out {
    100% {
        border-color: #ccc;
        top: -12px;
        right: -12px;
        bottom: -12px;
        left: -12px;
        opacity: 0
    }
}

.content {
  margin-bottom: 400px;
}

.footer {
   position: fixed;
   bottom: 0;
   left: 0;
   right: 0;
   height: 400px;
   z-index: -1;
}

selector {
  rule1: $value1_1;
  rule2: $value2_1;
   ...
  ruleN: $valueN_1;
  transition: all $transition_time;

  &:hover {
    rule1: $value1_2;
    rule2: $value2_2;
      ...
    ruleN: $valueN_2;
  }
}

import React from 'react';
import styled from 'styled-components';

const SVG = styled.svg`
  display: inline-block;
  vertical-align: middle;
`;

const Icon = ({ name, ...props }) {
  if (!name) {
    throw new Error('Unknown icon name!');
  }
  return (
    <SVG {...props}>
      <use xlinkHref={`#icon-${name}`} />
    </SVG>
  );
}

export default Icon;

import React from 'react';
import styled from 'styled-components';
import { Icon } from './components';

const StyledIcon = styled(Icon)`
  fill: ${props => props.state.fill};
`;

const Example = ({ iconState }) => <StyledSVG name="profile" state={iconState} />;

export default Example;