body{
  background:#eef4ff;
  display:flex;
  justify-content:center;
  padding:20px;
  font-family:Arial;
}

.calculator-card{
  width:100%;
  max-width:800px;
  background:white;
  padding:40px;
  border-radius:24px;
  text-align:center;
  box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

.mixed-container{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:25px;
  flex-wrap:wrap;
}

.mixed-box{
  display:flex;
  align-items:center;
  gap:15px;
}

.mixed-box > input{
  width:90px;
  height:55px;
  border-radius:12px;
  border:2px solid #dbe4ee;
  text-align:center;
  font-size:18px;
}

.fraction-box{
  width:150px;
}

.fraction-box input{
  width:100%;
  height:55px;
  border-radius:12px;
  border:2px solid #dbe4ee;
  text-align:center;
}

.fraction-line{
  height:3px;
  background:black;
  margin:10px 0;
}

select{
  width:80px;
  height:55px;
  border-radius:12px;
  border:2px solid #dbe4ee;
}

button{
  margin-top:35px;
  width:220px;
  height:55px;
  border:none;
  border-radius:14px;
  background:#2563eb;
  color:white;
  font-size:18px;
}

/* MOBILE */
@media(max-width:768px){

  .mixed-container{
    flex-direction:column;
  }

  .mixed-box{
    flex-direction:column;
  }

  .fraction-box{
    width:100%;
    max-width:220px;
  }

  button{
    width:100%;
  }

}