style.css

body {
  max-width: 1440px;
  margin: 0 auto;
  display:flex; 
  flex-direction:column; 
  justify-content:center;
  min-height: 100vh;  
}
::placeholder {
  color: #a4a4a4;
}
.main-wrapper {
  padding: 80px;
  margin: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  font-family: 'Aktiv Grotesk Ex Trial', sans-serif;
  box-shadow: 1px 3px 17px 1px rgba(125,125,125,0.51);
  -webkit-box-shadow: 1px 3px 17px 1px rgba(125,125,125,0.51);
  -moz-box-shadow: 1px 3px 17px 1px rgba(125,125,125,0.51);
  border-radius: 30px;
}
.wrapper-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  width: 100%;
}
.wrapper-row.dev-calc {
  grid-template-columns: 1fr 1fr 1fr;
}
.wrapper-col {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.wrapper-col.center {
  align-items: center;
  justify-content: center;
  width: fit-content;
}
.label-style {
  position: absolute;
  top: -11px;
  padding: 0px 10px;
  background-color: white;
  white-space: nowrap;
  font-weight: 600;
  text-align: center;
}
.input-style {
  padding: 40px;
  border: 1px solid #212228;
  border-radius: 30px;
  position: relative;
}
.computation-wrapper-style {
  padding: 38px;
  border-radius: 30px;
  background-color: #E2FF59;
  border: 1px solid #212228;
  position: relative;
  text-align: center;
}
input, select {
  font-family: 'Aktiv Grotesk Ex Trial', sans-serif;
  border: none;
  border-bottom: 1px solid #212228;
  background-color: transparent;
  padding: 10px 20px;
}
select {
  cursor: pointer;
}
input:focus-visible, select:focus-visible {
  outline: none;
  border-bottom: 1.5px solid #212228;
}

@media only screen and (max-width: 1200px) {
  .main-wrapper {
    gap: 20px;
  }
  .wrapper-row,  .wrapper-row.dev-calc{
    grid-template-columns: 1fr;
    justify-items: center;
  }
  .wrapper-col, .wrapper-col.center {
    width: 80%;
  }
}

@media only screen and (max-width: 768px) {
  .main-wrapper {
    padding: 40px;
    margin: 20px;
  }
  .wrapper-col, .wrapper-col.center {
    align-items: center;
  }
  input, select {
    width: 100%;
  }
  .computation-wrapper-style, .input-style {
    border-radius: 15px;
  }
}