:root {
  --font-serif:
    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --container-max-width: 1200px;
  --light-bg: #fff;
  --light-text: #333;
  --dark-bg: #333;
  --dark-text: #fff;
  --border-radius: 4px;
  --light-box-shadow: rgba(0, 0, 0, 0.05);
  --dark-box-shadow: rgba(255, 255, 255, 0.05);
  --h1-size: clamp(2rem, 4vw + 1rem, 3rem);
  --h2-size: clamp(1.75rem, 3vw + 1rem, 2.5rem);
  --h3-size: clamp(1.5rem, 2.5vw + 1rem, 2rem);
  --h4-size: clamp(1.375rem, 2vw + 1rem, 1.75rem);
  --h5-size: clamp(1.25rem, 1.5vw + 1rem, 1.5rem);
  --h6-size: clamp(1.125rem, 1vw + 1rem, 1.25rem);
  --link-color: #3498db;
  --link-color-strong: #2980b9;
  --badge-bg: #3498db;
  --badge-border: #2980b9;
  --badge-text: #ecf0f1;
}

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
}

body {
  margin: 0;
  padding: 1rem;
  background-color: light-dark(var(--light-bg), var(--dark-bg));
  color: light-dark(var(--light-text), var(--dark-text));
  font-family: var(--font-serif), serif;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  padding: 0 0 0.5em;
}

h1 {
  font-size: var(--h1-size);
}

h2 {
  font-size: var(--h2-size);
}

h3 {
  font-size: var(--h3-size);
}

h4 {
  font-size: var(--h4-size);
}

h5 {
  font-size: var(--h5-size);
}

h6 {
  font-size: var(--h6-size);
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:link {
  color: var(--link-color);
}

a:visited {
  color: var(--link-color-strong);
}

a:hover,
a:focus-visible,
a:active {
  color: var(--link-color-strong);
  text-decoration-line: underline;
  text-underline-offset: 3px;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.grid-columns {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  display: grid;
  gap: 1rem;
}

.item {
  padding: 1rem;
  box-shadow: 0 0 3rem
    light-dark(var(--light-box-shadow), var(--dark-box-shadow));
  display: flex;
  flex-direction: column;
  border-radius: var(--border-radius);
}

.grow {
  flex-grow: 1;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.3rem;
  border: 1px solid var(--badge-border);
  border-radius: var(--border-radius);
  background-color: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 0.75;
}