html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0 auto;
  padding: 20px;
}

footer {
  margin-top: auto;
  position: relative;
}

.flex-col-center {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

.btn-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-active {
  background: hsl(160, 100%, 75%);
}
.btn-active:hover {
  background: hsl(160, 100%, 60%);
}

.btn-error {
  background: hsl(0, 100%, 79%);
}
.btn-error:hover {
  background: hsl(0, 93%, 74%);
}

button {
  user-select: none;
}

img {
  width: 600px;
  max-width: 80vw;
  display: block;
  margin: auto;
}