* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  width: 100%;
}
:root {
  --dark: #333333;
  --white: #ffffff;
  --font1: #25ff37;
  --font2: #ff4c4c;
  --text: #333333;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: antiquewhite;
}
#box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 400px;
  width: 300px;
  background-color: var(--white);
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  gap: 30px;
  border: var(--dark) solid 5px;
}
#btn {
  height: 50px;
  width: 50px;
  border-radius: 10px;
  background-color: var(--white);
  border: var(--dark) solid;
}
p,
h1,
#btn {
  color: var(--text);
}