:root {
  --bs-border-radius: 4px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-size: 15px;
  background-color: rgb(252, 251, 254);
}

.container {
  max-width: 900px;
}

.container-calc {
  max-width: 500px;
}

.navbar-brand h1 {
  font-size: 21px;
  font-weight: bold;
  line-height: 2;
  margin: 0;
}

.card-header h1 {
  font-size: 17px;
  font-weight: bold;
  line-height: 1.6;
  margin: 0;
}

.about {
  padding: 1em;
  background-color: var(--bs-primary-bg-subtle);
  border-radius: var(--bs-border-radius);
}

.calculator .result {
  margin-top: 1em;
}

.actions button {
  margin-left: 6px
}

#status {
  margin-left: 8px
}

.spin {
  display: inline-block;
  width: 15px;
  height: 15px;
  border: 2px solid #60a5fa;
  border-top-color: transparent;
  border-radius: 50%;
  margin-right: 6px;
  animation: spin .8s linear infinite;
  vertical-align: -2px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}