@import url(http://fonts.lug.ustc.edu.cn/css?family=Open+Sans:400,600,700,800);
@import url(http://fonts.lug.ustc.edu.cn/css?family=Droid+Sans:400,700);
@import "//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css";

$dark: #212121;
$input-border-radius: 4px;
$input-border-width: .063rem;
$input-border-color: #b0bec5;
$input-padding: .75rem .875rem;
$input-submit-bg: #2196f3;
$input-submit-bg-hover: lighten($input-submit-bg, 5%);
$input-submit-padding: .75rem 1.5rem;
$body-bg: #eceff1;

*, *:before, *:after {
  box-sizing: border-box;
}

body {
  font-size: 100%;
  font-family: 'Open Sans', sans-serif;
  background: #BDBDBD;
}

.wrapper {
  max-width: 500px;
  height: 420px;
  margin: 3rem auto;
  background: $body-bg;
  padding: 0 0 1rem; 
  position: relative;
}

.form-header {
  background: #fff;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  color: $dark;
  padding: 1rem;
  margin: 0 0 1rem;
  position: relative;
  
  .close {
    position: absolute;
    right: 1rem;
    top: 1.25rem;
    color: darken($body-bg, 10%);
    cursor: pointer;
    transition: color .2s ease;
    
    &:hover {
      color: $dark;
    }
  }
}

.form-grp {
  margin: 0 2rem 1rem;
  
  label {
    display: block;
    margin: 0 0 .5rem;
    font-weight: 700;
    letter-spacing: .2px;
    font-size: .875rem;
    color: $dark;
    
    &.inline {
      display: inline-block;
      width: 100px;
    }
    
    &.inline.right {
      text-align: right;
      padding-right: .5rem;
    }
  }
}

input[type="text"],
input[type="email"],
input[type="password"] {
  padding: $input-padding;
  border-radius: $input-border-radius;
  outline: 0;
  color: $dark;
  font-size: .875rem;
  width: 100%;
  border: $input-border-width solid $input-border-color;
  
}

input[type="submit"] {
  padding: $input-submit-padding;
  margin: .5rem 0 0;
  outline: 0;
  border: 0;
  background: $input-submit-bg;
  border-radius: $input-border-radius;
  color: #FFF;
  font-weight: 700;
  font-size: .875rem;
  letter-spacing: .25px;
  transition: background .3s ease;
  
  &:hover {
    background: $input-submit-bg-hover;
  }
}