* {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background: linear-gradient(270deg,rgba(2, 0, 36, 1) 0%, rgba(9, 9, 121, 1) 35%, rgba(0, 212, 255, 1) 100%);
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 500px;
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.49);
    padding: 2%;
    background-color: rgba(240, 248, 255, 0.195);
    font-size: large;
}

label {
    display: block;
    padding: 5px;
    font-weight: bold;
}

#inputFrom, #from, #to {
    width: 60%;
    border: none;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
}

#from, #btnConvert {
    width: 35%;
}


/* CSS */
.button-19 {
  appearance: button;
  background-color: #1899D6;
  border: solid transparent;
  border-radius: 16px;
  border-width: 0 0 4px;
  color: #000;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .8px;
  line-height: 20px;
  margin: 0;
  outline: none;
  overflow: visible;
  padding: 10px 16px;
  text-align: center;
  text-transform: uppercase;
  touch-action: manipulation;
  transform: translateZ(0);
  transition: filter .2s;
  user-select: none;
  -webkit-user-select: none;
  vertical-align: middle;
  white-space: nowrap;
  width: 100%;
}

.button-19:after {
  background-clip: padding-box;
  background-color: #1CB0F6;
  border: solid transparent;
  border-radius: 16px;
  border-width: 0 0 4px;
  bottom: -4px;
  content: "";
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  z-index: -1;
}

.button-19,
.button-19:focus {
  user-select: auto;
}

.button-19:hover:not(:disabled) {
  filter: brightness(1.9);
  -webkit-filter: brightness(1.1);
}

.button-19:disabled {
  cursor: auto;
}

.button-19:active {
  border-width: 4px 0 0;
  background: none;
}

#output {
    text-align: center;

}