@media (prefers-color-scheme: dark) {
  html,
  body {
    background-color: #333;
    color: #eee;
  }
}

html,
body {
  margin: 0;
  min-height: 100%;
  height: 100%;
}

.d-flex {
  display: flex;
}

.row {
  flex-flow: row;
}

.column {
  flex-flow: column;
}

.align-center {
  align-items: center;
  justify-content: center;
}

.stretch {
  align-self: stretch;
}

.root-container {
  min-height: 100%;
  display: flex;
}

.round-btn {
  cursor: pointer;
  margin: 0.5rem;
  min-width: 100px;
  min-height: 100px;
  border: 0;
  border-radius: 100%;
  font-size: 1em;
}

.input {
  transition: box-shadow 0.1s ease-out;
}

.input:hover,
.input:focus,
.input:active {
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

input[type='text'] {
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 0.5em;
}