html {
  font-family: Arial;
}

body{
  margin: 0;
  background-color: #DEDEDE;
}

#main-header{
  width: 100vw;
  margin: 0;
  background-color: #090621;
  text-align: center;
}

#header-text{
  margin: 0;
  padding: 20px;
  color: white;
  font-size: 2em;
}

#header-button-container{
  width: 100vw;
  display: flex;
  justify-content: center;
}

.operator-button {
  max-width: 200px;
  width: 25%;
  height: 50px;
  background-color: #DEDEDE;
  color: #090621;
  border: solid 5px #090621;
  font-size: 1.5em;
}

#main-section{
  display: flex;
  justify-content: center;
  width: 100vw;
}

#main-article{
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 70vw;
  margin-top: 10vh;
}

.section-container{
  display: flex;
  flex-direction: row;
  justify-content: center;
  margin-top: 10vh;
}

#input-container{
  margin: 25px 0px 0px 0px;
  width: 100%;
}

.number-input{
  width: 100%;
  max-width: 300px;
  height: 25px;
  margin: 4px;
  background-color: #00000;
  color: #090621;
  border: solid 1px #090621;
  border-radius: 6px;
  text-align: center;
  font-size: 1em;
}

#submit{
  width: 70%;
  max-width: 350px;
  height: 60px;
  background-color: #090621;
  color: #DEDEDE;
  border: solid 1px #DEDEDE;
  border-radius: 10px;
  font-size: 1.5em;
}

#output-container{
  display: flex;
  flex-direction: column;
  text-align: center;
}

@media (max-width: 900px){
  #main-article{
    min-width: 90vw;
  }
  
  #header-text{
    font-size: 3.3vw;
  }
  
  .operator-button{
    font-size: 3vw;
  }
  
  .number-input{
    font-size: 2vw;
  }
}


#article {
  padding:  10%;
}