тест

*** QuickLaTeX cannot compile formula:
primary: #2196F3;

body {
  font-family: "Open Sans", sans-serif;
  height: 100vh;
  background: url("https://i.imgur.com/HgflTDf.jpg") 50% fixed;
  background-size: cover;
}

@keyframes spinner {
  0% { transform: rotateZ(0deg); }
  100% { transform: rotateZ(359deg); }
}

* {
  box-sizing: border-box;
}

.wrapper {
  display: flex;
  align-items: center;
  flex-direction: column; 
  justify-content: center;
  width: 100%;
  min-height: 100%;
  padding: 20px;
  background: rgba(darken(

*** Error message:
You can't use `macro parameter character #' in math mode.
leading text: $primary: #

primary,40%), 0.85);
}

.login {

border-radius: 2px 2px 5px 5px;
padding: 10px 20px 20px 20px;
width: 90%;
max-width: 320px;
background: #ffffff;
position: relative;
padding-bottom: 80px;
box-shadow: 0px 1px 5px rgba(0,0,0,0.3);

&.loading {
button {
max-height: 100%;
padding-top: 50px;
.spinner {
opacity: 1;
top: 40%;
}
}
}

&.ok {
button {
background-color: #8bc34a;
.spinner{
border-radius: 0;
border-top-color: transparent;
border-right-color: transparent;
height: 20px;
animation: none;
transform: rotateZ(-45deg);
}
}
}

input {
display: block;
padding: 15px 10px;
margin-bottom: 10px;
width: 100%;
border: 1px solid #ddd;
transition: border-width 0.2s ease;
border-radius: 2px;
color: #ccc;

&+ i.fa {
color: #fff;
font-size: 1em;
position: absolute;
margin-top: -47px;
opacity: 0;
left: 0;
transition: all 0.1s ease-in;
}

&:focus {
&+ i.fa {
opacity: 1;
left: 30px;
transition: all 0.25s ease-out;
}
outline: none;
color: #444;
border-color:

*** QuickLaTeX cannot compile formula:
primary;
      border-left-width: 35px;
    }
    
  }
  
  a {
   font-size: 0.8em;   
    color:

*** Error message:
Extra }, or forgotten $.
leading text:     }

primary;
text-decoration: none;
}

.title {
color: #444;
font-size: 1.2em;
font-weight: bold;
margin: 10px 0 30px 0;
border-bottom: 1px solid #eee;
padding-bottom: 20px;
}

button {
width: 100%;
height: 100%;
padding: 10px 10px;
background:

*** QuickLaTeX cannot compile formula:
primary;
    color: #fff;
    display: block;
    border: none;
    margin-top: 20px;
    position: absolute;
    left: 0;
    bottom: 0;
    max-height: 60px;
    border: 0px solid rgba(0,0,0,0.1);
  border-radius: 0 0 2px 2px;
    transform: rotateZ(0deg);
    
    transition: all 0.1s ease-out;
      border-bottom-width: 7px;
    
    .spinner {
      display: block;
      width: 40px;
      height: 40px;
      position: absolute;
      border: 4px solid #ffffff;
      border-top-color: rgba(255,255,255,0.3);
      border-radius: 100%;
      left: 50%;
      top: 0;
      opacity: 0;
      margin-left: -20px;
      margin-top: -20px;
      animation: spinner 0.6s infinite linear;
      transition: top 0.3s 0.3s ease,
                opacity 0.3s 0.3s ease,
                border-radius 0.3s ease;
      box-shadow: 0px 1px 0px rgba(0,0,0,0.2);
    }
    
  }
  
    &:not(.loading) button:hover {
      box-shadow: 0px 1px 3px

*** Error message:
You can't use `macro parameter character #' in math mode.
leading text:     color: #

primary;
}
&:not(.loading) button:focus {
border-bottom-width: 4px;
}

}

footer {
display: block;
padding-top: 50px;
text-align: center;
color: #ddd;
font-weight: normal;
text-shadow: 0px -1px 0px rgba(0,0,0,0.2);
font-size: 0.8em;
a, a:link {
color: #fff;
text-decoration: none;
}
}