:root {
  --text: #222;
  --muted: #666;
  --border: #ddd;
  --code-bg: #f6f8fa;
  --table-head-bg: #f2f2f2;
  --link: #0366d6;
  --header-bg: #171717;
  --header-border: #2a2a2a;
  --header-text: #f5f5f5;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  padding: 0;
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Helvetica Neue",
    Arial,
    "Noto Sans",
    "Noto Sans JP",
    sans-serif;
  line-height: 1.65;
  background: #fff;
}

.site-header {
  box-sizing: border-box;
  width: 100%;
  padding: 12px 28px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--header-text);
  text-decoration: none;
  font-size: 26px;
  font-weight: 600;
}

.site-brand:hover {
  color: #fff;
  text-decoration: none;
}

.site-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  display: inline-block;
}

.site-title {
  line-height: 1;
  letter-spacing: 0.01em;
}

main {
  margin: 0;
  padding: 48px 56px 72px;
  max-width: none;
  box-sizing: border-box;
}

h1 {
  margin: 0 0 24px;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
  font-size: 2.45rem;
  font-weight: 400;
  line-height: 1.25;
}

h2 {
  margin-top: 2rem;
  padding-bottom: 0.2em;
  border-bottom: 1px solid var(--border);
  font-size: 1.75rem;
  font-weight: 400;
  line-height: 1.3;
}

h3 {
  margin-top: 1.5rem;
  font-size: 1.3rem;
  font-weight: 500;
  line-height: 1.35;
}

h4,
h5,
h6 {
  margin-top: 1.25rem;
  line-height: 1.35;
}

.doc-keyword {
  margin-top: 1.2rem;
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-bottom: none;
}

p {
  margin: 0.8em 0;
}

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

a:hover {
  text-decoration: underline;
}

ul,
ol {
  padding-left: 1.6em;
}

li {
  margin: 0.25em 0;
}

/* Inline code only: pink/red, like official AC Library docs. */
p code,
li code,
td code,
dd code,
blockquote code {
  color: #e83e8c;
  background: #f8f8f8;
  padding: 0.15em 0.35em;
  border-radius: 3px;
  font-family:
    ui-monospace,
    SFMono-Regular,
    Consolas,
    "Liberation Mono",
    Menlo,
    monospace;
  font-size: 0.92em;
}

/* Normal Markdown code blocks: no line numbers. */
pre {
  margin: 1em 0;
  padding: 0.65em 0.85em;
  border: 1px solid #e5e5e5;
  border-radius: 2px;
  background: #fff;
  overflow-x: auto;
}

pre code,
pre code.language-nim,
pre code.hljs {
  display: block;
  padding: 0;
  color: #333;
  background: transparent;
  font-family:
    ui-monospace,
    SFMono-Regular,
    Consolas,
    "Liberation Mono",
    Menlo,
    monospace;
  font-size: 13px;
  line-height: 1.45;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
}

th,
td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  vertical-align: top;
}

th {
  background: var(--table-head-bg);
  font-weight: 600;
}

/* MathJax */
mjx-container[jax="SVG"][display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
}

mjx-container {
  line-height: 1.2;
}

blockquote {
  margin: 1em 0;
  padding: 0.5em 1em;
  color: var(--muted);
  border-left: 4px solid var(--border);
  background: #fafafa;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

img {
  max-width: 100%;
}

.nav {
  margin: 1em 0 2em;
  color: var(--muted);
}

.nav a {
  margin-right: 0.8em;
}

.warning {
  border-left: 4px solid #f0ad4e;
  background: #fff8e5;
  padding: 0.75em 1em;
}

.experimental {
  border-left: 4px solid #6f42c1;
  background: #f7f2ff;
  padding: 0.75em 1em;
}

/* @{example...} code samples, aligned with official AC Library docs. */
.example-caption {
  margin: 1.2em 0 0.4em;
  font-size: 1.05rem;
}

.example-caption a {
  font-weight: 500;
}

.sample-code {
  width: 100%;
  margin: 0.75em 0 1.25em;
  border: 1px solid #e5e5e5;
  background: #fff;
  font-size: 13px;
  line-height: 1.45;
}

.sample-code .ace_gutter {
  background: #f2f2f2;
  color: #777;
  border-right: 1px solid #e5e5e5;
}

.sample-code .ace_content {
  background: #fff;
}

.sample-code .ace_marker-layer .ace_active-line,
.sample-code .ace_gutter-active-line {
  background: transparent;
}

.sample-code .ace_print-margin {
  display: none;
}

.sample-code .ace_cursor {
  display: none !important;
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .site-brand {
    font-size: 20px;
    gap: 10px;
  }

  .site-logo {
    width: 30px;
    height: 30px;
  }

  main {
    padding: 32px 18px 52px;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }
}


/* NIM_ACL_PROBLEM_EXAMPLES_STYLE_V1 */
.problem-examples {
  margin: 1em 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fafafa;
}

.problem-examples > summary {
  cursor: pointer;
  padding: 0.75em 1em;
  font-weight: 600;
}

.problem-examples[open] > summary {
  border-bottom: 1px solid var(--border);
}

.problem-examples > ul {
  margin: 0.8em 1em 1em 2.4em;
  padding-left: 0.8em;
}

.problem-examples > ul > li {
  margin: 0.45em 0;
}
/* /NIM_ACL_PROBLEM_EXAMPLES_STYLE_V1 */