:root {
  --gray00: #fff;
  --gray90: #0a0a23;
}

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html {
  font-family: Roboto, sans-serif;
  font-size: 18px;
}

body {
  width: 100vw;
  height: 100vh;
  display: grid;
  place-items: center;
  color: var(--gray00);
  background-color: var(--gray90);
}

.container {
  width: fit-content;
  height: fit-content;
  padding: 1rem;
  text-align: center;
}

.input-box {
  margin: 1rem 0;
}

#text-input,
#check-btn {
  padding: 0.5rem;
}

input:focus {
  outline: none;
}

#check-btn {
  background-color: var(--gray90);
  color: var(--gray00);
  font-weight: bold;
  border-color: var(--gray00);
  border-style: solid;
}

#check-btn:hover {
  background-color: var(--gray00);
  color: var(--gray90);
  cursor: pointer;
  transition: 0.3s;
}

h2 {
  margin-bottom: 10px;
}

p {
  max-width: 400px;
  text-align: left;
}

#result {
  height: 22px;
  margin-bottom: 30px;
}