@import url(http://fonts.lug.ustc.edu.cn/css?family=Roboto:400,300);
* { box-sizing: border-box; }

html { height: 100%; }

body {
  height: 100%;
  font-family: Roboto, san-serif;
  font-weight: 300;
  background-color: #f5f6f7;
}


/* Form element setup */
form {
  position: absolute;
  top: 0;
  left: 50%;
  width: 300px;
  transform: translateX(-50%);
  margin: 2rem 0;
  z-index: 1;
}

fieldset {
  margin: 0 0 1rem 0;
  padding: 0;
  border: none;
}

legend {
  font-weight: 400;
}

legend,
label {
  display: inline-block;
  margin-bottom: .5rem;
}

input[type='text'],
textarea,
select {
  display: block;
  padding: .5rem;
  width: 100%;
  background-color: white;
  border-radius: .25rem;
  border: 1px solid #e5e5e5;
  outline: none;
      
  /* List some properties that might change */
  transition-property: none;
  transition-duration: none;
  
  &:focus {
    border-color: rgb(239,126,173);
  }
}

textarea {
  max-width: 300px;
  height: 100px;
}

input[type='text'],
select {
  height: 34px;
}

input[type='checkbox'],
input[type='radio'] {
  position: relative;
  top: 5px;
  width: 22px;
  height: 22px;
  margin: 0 .5rem;
  background-color: white;
  border: 1px solid #e5e5e5;
  outline: none;
  -moz-appearance: none;
  -webkit-appearance: none;
  
  /* List some properties that might change */
  transition-property: none;
  transition-duration: none;
}

input[type='checkbox'] {
  border-radius: 5px;

  &:checked {
    background-color: rgb(239,126,173); 
    border: none;

    &:after {
      display: block;
      content: '';
      height: 4px;
      width: 10px;
      border-bottom: 3px solid #fff;
      border-left: 3px solid #fff;
      transform: translate(5px,6px) rotate(-45deg) scale(1);
    }
  }
}

input[type='radio'] {
  border-radius: 50%;
  
  &:checked {
    border-width: 5px;
    border-color: white;
    background-color: rgb(239,126,173);
  }
}



button {
  display: block;
  margin: 3em auto;
  padding: .5rem 2rem;
  font-size: 125%;
  color: white;
  border: none;
  border-radius: .25rem;
  background-color: rgb(239,126,173);
  outline: none;
  box-shadow: 0 .4rem .1rem -.3rem rgba(0,0,0,.1);

  /* We'll talk about this next */
  transform: perspective(300px) scale(.95) translateZ(0);
  transform-style: preserve-3d;

  /* List the properties that you're looking to transition.
     Try not to use 'all' */
  transition-property: none;

  /* This applies to all of the above properties */
  transition-duration: none;
    
  &:hover {
    cursor: pointer;
    background-color: lightgray;
    box-shadow: 0 0 0 0 rgba(0,0,0,0);
    transform: scale(1.1) rotateX(0);
  }

  &:active {
    background-color: rgb(239,126,173);
    transform: scale(1.05) rotateX(-10deg);
  }
}