/* === Reset === */

/* Box sizing rules */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default padding */
ul[class],
ol[class],
legend,
fieldset {
  padding: 0;
}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
ul[class],
ol[class],
li,
figure,
figcaption,
blockquote,
dl,
dd,
fieldset {
  margin: 0;
}

fieldset {
  border: none;
}

/* Set core body defaults */
body {
  min-height: 100vh;
  scroll-behavior: smooth;
  text-rendering: optimizeSpeed;
  line-height: 1.5;
}

/* Remove list styles on ul, ol elements with a class attribute */
ul[class],
ol[class] {
  list-style: none;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
  text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img {
  max-width: 100%;
  display: block;
}

/* Natural flow and rhythm in articles by default */
article > * + * {
  margin-top: 1em;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
  font: inherit;
}

/* Remove all animations and transitions for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* === Main === */

body {
  margin: 0 auto;
  padding: 1rem;
  max-width: 800px;
  font-family: Arial, Helvetica, sans-serif;
  color: #222;
}

*:focus {
  outline: 2px solid #483d8b;
  outline-offset: 2px;
}

button {
  background-color: #483d8b;
  border: none;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 5px;
}

button:focus {
  background-color: #6a5acd;
}

.stack-3 > * + * {
  margin-top: calc(1rem / (1.5 * 1.5 * 1.5));
}

.stack-1 > * + * {
  margin-top: calc(1rem / 1.5);
}

.stack0 > * + * {
  margin-top: 1rem;
}

.button-group > * {
  margin: -0.5rem;
}

.button-group > * > button {
  margin: 0.5rem;
}

.group-title {
  text-transform: capitalize;
}