@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700;800;900&display=swap');




html {
background-color: var(--background-dark);
background-image: var(--background-gradient);
  color: var(--black);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

:root {
  --background-dark: #0093E9;
  --background-gradient: linear-gradient(160deg, #0093E9 0%, #80D0C7 100%);
  --black: #000;
  --white: #fff;
  
}

.header {
  text-align: center;
  margin-top: 100px;
}

.container {
  width: 300px;
  height: 100vh;
  margin: auto auto;
}

label,
input {
  display: block;
  margin-top: 0.5rem;
  width: 100%;
}

label {
  font-weight: 500;
  font-size: 1.3rem;
}

input {
  border-radius: 5px;
  padding: 0.5rem;
  border: transparent;
  font-size: large;
  margin: 1rem 0;
}

#calculate-number {
  margin: 0.5rem auto;
  display: block;
}

#calculate-number {
  background-color: var(--background-dark);
  border: none;
  color: var(--black);
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
  font-size: large;
  cursor: pointer;
  outline: var(--black);
  margin: auto;
  display: block;
}

#output-container {
  display: block;
  margin: auto;
  margin-top: 1rem;
  width: 100%;
  text-align: center;
  padding: 0.5rem;
  font-size: x-large;
  border-color: var(--black);
  border-width: medium;
  border-radius: 5px;
}