* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text, #1f2933);
  background: var(--color-bg, #f8fafc);
}

nav,
main,
body > footer {
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
}

nav {
  padding: 1rem 0;
}

nav a {
  color: var(--color-link, #0f4c81);
  text-decoration: none;
  margin-right: 1rem;
}

nav a:hover {
  text-decoration: underline;
}

a.button {
  display: inline-block;
  background: var(--color-primary, #0f4c81);
  color: #fff;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}

a.button:hover {
  background: #0a3a6a;
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  a.button {
    background: #2563eb;
  }
  a.button:hover {
    background: #1d4ed8;
  }
}

.lang-switcher {
  display: inline-block;
  float: right;
}

.lang-switcher form {
  display: flex;
  gap: 0.25rem;
}

.lang-switcher button {
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  color: #0f4c81;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.1rem 0.4rem;
}

.lang-switcher button:hover {
  border-color: #0f4c81;
}

.lang-switcher button.lang-active {
  border-color: #0f4c81;
  font-weight: 600;
}

.hero {
  padding: 2rem 0 1rem;
}

.hero h1 {
  margin: 0;
  font-size: 2rem;
}

.hero p {
  color: #52606d;
}

main {
  padding: 1rem 0 2rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.25;
  margin: 1.25rem 0 0.75rem;
}

p,
ul,
ol {
  margin: 0.75rem 0;
}

a {
  color: var(--color-link, #0f4c81);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

pre,
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--color-surface, #e4e7eb);
  border-radius: 6px;
}

code {
  padding: 0.1rem 0.35rem;
}

pre {
  padding: 0.75rem;
  overflow-x: auto;
}

pre code {
  padding: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--color-border, #cbd2d9);
  padding: 0.5rem;
  text-align: left;
}

tbody tr:nth-child(odd) {
  background: #f0f4f8;
}

body > footer {
  border-top: 1px solid var(--color-border, #cbd2d9);
  color: var(--color-text, #52606d);
  padding: 1rem 0 2rem;
}

.lang-switcher button {
  color: var(--color-link, #0f4c81);
}

.lang-switcher button:hover,
.lang-switcher button.lang-active {
  border-color: var(--color-link, #0f4c81);
}