body{
  background:#f8fafc;
  display:flex;
  justify-content:center;
  align-items:center;
  min-height:100vh;
  font-family:Arial;
}

.calculator-card{
  width:100%;
  max-width:450px;
  background:white;
  padding:40px;
  border-radius:24px;
  text-align:center;
  box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

.fraction-box{
  width:180px;
  margin:auto;
}

.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;
}

button{
  margin-top:30px;
  width:100%;
  height:55px;
  border:none;
  border-radius:14px;
  background:#2563eb;
  color:white;
}