:root {
  color-scheme: light dark;
  --bg: #f6f8fa;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #59636e;
  --border: #d1d9e0;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --accent-text: #ffffff;
  /* Button backgrounds need >= 4.5:1 against white text, unlike link colors on the page background. */
  --button-bg: #0969da;
  --button-bg-hover: #0550ae;
  --code-bg: #eff2f5;
  --header-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --text: #e6edf3;
    --muted: #9198a1;
    --border: #30363d;
    --accent: #388bfd;
    --accent-hover: #58a6ff;
    --accent-text: #ffffff;
    --button-bg: #1f6feb;
    --button-bg-hover: #0969da;
    --code-bg: #1c2129;
    --header-bg: #161b22;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */

.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
}

.site-header h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  line-height: 1.25;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.version {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: none;
}

.description {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.vcc {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.75rem;
}

.url-box {
  display: flex;
  flex: 1 1 320px;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-bg);
  overflow: hidden;
}

.url-box input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.6rem 0.8rem;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

.url-box input:focus {
  outline: none;
}

.url-box .button {
  border-radius: 0;
  border-width: 0 0 0 1px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.button:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.button.primary {
  background: var(--button-bg);
  border-color: var(--button-bg);
  color: var(--accent-text);
  font-size: 1.05rem;
}

.button.primary:hover {
  background: var(--button-bg-hover);
  border-color: var(--button-bg-hover);
}

.hint {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.25rem;
  font-size: 0.95rem;
}

/* Main */

main.container {
  padding: 2rem 1.25rem 3rem;
}

.markdown-body {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 2rem 2rem;
  overflow-wrap: anywhere;
}

.markdown-body > :first-child {
  margin-top: 0;
}

.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
}

.markdown-body h2 {
  font-size: 1.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.markdown-body h3 {
  font-size: 1.2rem;
}

.markdown-body h4 {
  font-size: 1.05rem;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol {
  margin: 0 0 1rem;
}

.markdown-body li + li {
  margin-top: 0.25rem;
}

.markdown-body li > ul,
.markdown-body li > ol {
  margin: 0.25rem 0 0;
}

.markdown-body code {
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--code-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.markdown-body pre {
  margin: 0 0 1rem;
  padding: 0.9rem 1rem;
  border-radius: 8px;
  background: var(--code-bg);
  overflow-x: auto;
}

.markdown-body pre code {
  padding: 0;
  background: none;
  font-size: 0.9rem;
}

.markdown-body table {
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0 0 1rem;
  border-collapse: collapse;
  overflow-x: auto;
  font-size: 0.95rem;
}

.markdown-body th,
.markdown-body td {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

.markdown-body th {
  background: var(--code-bg);
  text-align: left;
}

.markdown-body blockquote {
  margin: 0 0 1rem;
  padding: 0.25rem 1rem;
  border-left: 4px solid var(--border);
  color: var(--muted);
}

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

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 600px) {
  .site-header {
    padding: 2rem 0 1.5rem;
  }

  .site-header h1 {
    font-size: 1.6rem;
  }

  .markdown-body {
    padding: 1rem 1.1rem 1.5rem;
  }

  .button.primary {
    flex: 1 1 100%;
  }
}