* {
  box-sizing: border-box;
  font-family: 'Ubuntu', sans-serif;
}

html {
  height: max-content;
  width: 100vw;
  display: flex;
  align-self:flex-start;
  justify-content: center;
  align-items: center;
   background: #ffffff;
}

#container {
  height: 500px;
  width: 400px;
  
  display: flex;
  flex-direction: column;
  padding: 0;
  margin: auto;
  align-items: center;
  border-radius: 5px;
  background: rgb(87,117,244);
background: linear-gradient(329deg, rgba(87,117,244,0.9252743333661589) 0%, rgba(66,83,186,1) 52%, rgba(105,189,255,1) 100%);
  -webkit-box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.34);
-moz-box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.34);
box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.34);
}

main {
  width: 100%;
  height: 100%;
  border: none;
  margin: 0;
  padding: 0;
}


main form {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  height: 100%;
  
}

main form input {
  border-radius: 5px;
  border: none;
  height: 25px;
  margin: 8px;
  text-align: center;
  width: 100px;
}

main form #calculate {
  margin: 10px;
  width: 100px;
  height: 25px;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 30px;
  border: none;
  text-align: center;
  background-color: orange;
  line-height: 25px;
}

main form select {
  margin: 10px;
  height: 25px;
  width: 100px;
  border-radius: 5px;
  border: none;
}

h1 {
  font-size: 20px;
  font-weight: bold;
}

.output {
  border: none;
  font-weight: bolder;
  background-color: transparent;
  font-size: 25px;
  color: white;
  width: 200px;
}

main form label {
  font-weight: bolder;
  font-size: 18px;
}


#article {
  padding: 10% 10% 1%;
}