index.scss

$secondary-color: #125688;
$platzigram-red: #f44336;

@import "node_modules/materialize-css/sass/materialize.scss";
@import "./loader";

@mixin prefix($property, $value, $vendors: webkit moz ms o){
  @if $vendors{
    @each $vendor in $vendors{
      #{"-" + $vendor + "-" + $property}: #{$value};
    }
  }
  #{$property}: #{value};
}

body {
  background: #fafafa;
  color: $secondary-color;
  font-family: Montserrat;
}

.iphone {
  max-width: 100%;
}

.landing{
  margin: 30px auto;
}

.site-footer {
  text-transform: uppercase;
  font-size: 12px;
}

.login-box,
.signup-box {
  background-color: white;
  border: 1px solid #edeeee;
  border-radius: 3px;
  padding: 10px 0;
  text-align: center;
}

.platzigram {
  font-family: 'Oleo Script';
  font-size: 42px;
  color: $secondary-color !important;
}

.signup-form {
  width: 65%;
  margin: 0 auto;
}

.signup-form h2 {
  color: #a5a7aa;
  font-size: 1.2em;
}

.signup-form .btn.btn-fb {
  background-color: #4090db;
  font-size: .8em;
}

.signup-form .btn.btn-fb:hover {
  background-color: #2d6599;
}

.signup-form .btn.btn-signup {
  background-color: $secondary-color;
}

.header{
  background-color: white;
  color: $secondary-color;
  box-shadow: none;
  border-bottom: 1px solid #edeeee;
}

.timeline{
  padding: 30px 0;
}

$avatar-size: 48px; 

.avatar{
  width: $avatar-size;
  height: $avatar-size;
  border-radius: 50%;
  float: left;
  margin-right: 12px;
}

.card .username{
  color: $secondary-color;
}

.card small.time{
  line-height: $avatar-size;
}

.card p{
  padding: 20px 0;
}

.card .likes{
  line-height: 30px;
  margin-left: 12px;
}

.card i{
  font-size: 20px;
}

.card .fa-heart-o{
  color: $secondary-color;
}

.card .fa-heart {
  color: #f44336;
  display: none;
}

.card.liked {  //esto es una caracteristica de sass
  .fa-heart{
    display: block;
  }

  .fa-heart-o{
    display: none;
  }
}

.form-upload {

  span, button {
    color: white;
  }

  .fileUpload {
    position: relative;
    overflow: hidden;
    margin: 10px;


    input {
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      margin: 0;
      padding: 0;
      font-size: 20px;
      cursor: pointer;
      opacity: 0;
      filter: alpha(opacity=0);
    }

  }
}

  .user-page {
    margin-top: 30px;

    .heading{
      margin-top: 20px;
    }

    .picture-container{
      display: flex;
      align-items: center;
      justify-content: center;
      height: 400px;
      // margin-bottom:  200px;
      position: relative;

      &:hover{
        .picture{
          @include prefix(filter, blur(5px) grayscale(100%));
        }

        .likes{
          display: flex;
        }
      }

      .picture{
        margin-bottom: 20px;
        display: block;
        max-width: 100%;
        max-height: 100%;
      }

      .likes{
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        text-align: center;
        display: none;
        justify-content: center;
        align-items: center;
        color: $platzigram-red;
        font-size: 34px;
        display: none;
      }

      .fa-heart{
        margin-right: 8px;
        display: inline-block;        
      }
    }
  }

  .modal{
    img{
      max-width: 100%;
      max-height: 100%;
    }

    .fa-heart{
      display: inline-block;
    }
  }

  .like-heart{
    font-size: 10em;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    transition: all .2s ease;
    opacity: 0;

    &.liked {
      color: $platzigram-red;
      font-size: 12em;
      display: block;
      transition: all .1s ease;
      opacity: 1;
    }
  }