/************ Square *************/

.square {
  transition: 1s;
  margin-left: -60px;
  margin-top: 100px;
  border: 5px solid #000;
  letter-spacing: normal;
  line-height: normal;
  /* Color & Background */
  color: rgb(0, 0, 0);
  /* Box */
  height: 50px;
  width: 50px;
  /* Positioning */
  position: relative;
  /* Effects */
  transform: matrix(6.12323e-17, -1, 1, 6.12323e-17, 0, 0);
  transition: transform 0.4s ease-in-out 0s;
  box-sizing: content-box;
  margin-bottom: 10px;
  border-radius: 10px;
}

.square:hover {
  transition: 0.5s;
  transform: rotate(-180deg);
}

/* border box */

html {
  box-sizing: border-box;
  -webkit-user-select: none;
  /* Chrome all / Safari all */
  -moz-user-select: none;
  /* Firefox all */
  -ms-user-select: none;
  /* IE 10+ */
  user-select: none;
  /* Likely future */
}

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

b {
  font-weight: bold;
}

/* main app styles */

body {
  width: 700px;
  margin: 0 auto;
  background-color: #FAFAFA;
  font-family: 'Source Sans Pro', sans-serif;
  color: #111;
}

.container {
  margin: 2% auto;
  padding: 15px;
  background-color: #FFFFFF;
  -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
  box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
  border-radius: 12px;
}

h1 {
  font-size: 3rem;
  font-weight: 900;
  text-align: center;
  margin: 1% 0 3%;
}

textarea {
  width: 100%;
  height: 250px;
  padding: 10px;
  border: 1px solid #d9d9d9;
  border-radius: 6px;
  outline: none;
  font-size: 1rem;
  resize: none;
  line-height: 1.5rem;
}

textarea:hover {
  border-color: #C0C0C0;
}

textarea:focus {
  border-color: #4D90FE;
}

.output.row {
  width: 100%;
  border: 1px solid #DDD;
  font-size: 1.4rem;
  margin: 1% 0;
  background-color: #F9F9F9;
}

.output.row div {
  display: inline-block;
  width: 42%;
  padding: 10px 15px;
  margin: 1%;
}

.output.row span {
  font-weight: bold;
  font-size: 1.5rem;
}

#readability {
  width: 52%;
  font-weight: bold;
}

#readability:hover {
  background-color: #4D90FE;
  color: #FFF;
  border-radius: 2px;
  cursor: pointer;
}

#readability:active {
  background-color: #307AF3;
}

.keywords {
  display: none;
  margin: 4% 0 0;
  font-size: 2rem;
  font-weight: 900;
}

.keywords ul {
  font-weight: 400;
  border: 1px solid #DDD;
  font-size: 1.4rem;
  background-color: #F9F9F9;
  margin: 2% 0;
}

.keywords li {
  display: inline-block;
  width: 44%;
  padding: 10px;
  margin: 1%;
}


/* 
** Making it responsive
*/

@media (max-width: 750px) {
  body {
    width: 600px;
  }
  .output.row {
    font-size: 1.2rem;
  }
  .output.row span {
    font-size: 1.3rem;
  }
  .keywords ul {
    font-size: 1.2rem;
  }
}

@media (max-width: 600px) {
  /* rewriting old styles */
  body {
    width: 95%;
  }
  .output.row {
    border: none;
    background-color: #FFF;
  }
  .output.row div {
    display: block;
    width: 100%;
    padding: 10px 15px;
    margin: 2% auto;
    border: 1px solid #DDD;
    font-size: 1.8rem;
    background-color: #F9F9F9;
  }
  .output.row span {
    font-size: 2rem;
  }
  #readability {
    width: 100%;
    font-size: 1.6rem;
    font-weight: 400;
  }
  .keywords {
    margin: 10% auto;
  }
  .keywords ul {
    font-weight: 400;
    border: none;
    font-size: 1.8rem;
    background-color: #F9F9F9;
    margin: 5% 0;
  }
  .keywords li {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 2% auto;
    border: 1px solid #DDD;
  }
}