@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  --text-color: #ecf0f1;
  --bg-color: #1a1a1a;

  font-size: 62.5%;
}

body {
  font-size: 1.6rem;

  height: 100vh;
  background: var(--bg-color);

  display: grid;
  place-content: center;
}

body * {
  font-family: 'Fira Code', monospace;
  color: var(--text-color);
}

/* app */
#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3.2rem;
}

#app h1 {
  font-size: 4rem;
  line-height: 4.8rem;
}

#app div {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

#app button {
  font-weight: bold;
  line-height: 100%;
  letter-spacing: 2%;
  color: var(--bg-color);

  padding: 1rem 2rem;
  border: 2px solid var(--text-color);
  border-radius: 5rem;
  background: var(--text-color);

  cursor: pointer;
}

#app button.secondary {
  color: var(--text-color);
  background: transparent;
}

#app button.tertiary {
  color: var(--text-color);

  padding: 0;
  border: none;
  background: transparent;
}

#app button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* media queries */
@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #ecf0f1;
    --bg-color: #1a1a1a;
  }
}
@media (prefers-color-scheme: light) {
  :root {
    --text-color: #1a1a1a;
    --bg-color: #ecf0f1;
  }
}