:root {
  --bg: #ffffff;
  --bg-secondary: #f6f8fa;
  --border: #d0d7de;
  --text: #1f2328;
  --text-secondary: #656d76;
  --link: #0969da;
  --accent: #0969da;
  --code-bg: #eff1f3;
  --table-header-bg: #f6f8fa;
  --table-row-hover: #f3f8ff;
  --badge-bg: #ddf4ff;
  --badge-text: #0969da;
  --nullable-yes: #1a7f37;
  --nullable-no: #cf222e;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

/* ---- Headings ---- */
h1 {
  font-size: 28px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
  margin-bottom: 20px;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 8px;
}

/* ---- Links ---- */
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Paragraphs ---- */
p { margin-bottom: 12px; }

/* ---- Code ---- */
code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

pre code {
  background: none;
  padding: 0;
}

/* ---- Tables ---- */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 24px;
  font-size: 14px;
}

thead th {
  background: var(--table-header-bg);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
  color: var(--text);
}

tbody td {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--table-row-hover);
}

/* Name column (first) - monospace */
tbody td:first-child {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
}

/* Type column styling */
tbody td:nth-child(2) {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---- SVG / ER Diagram ---- */
img[src$=".svg"],
object[type="image/svg+xml"],
svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 16px 0 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: var(--bg);
}

/* ---- Lists ---- */
ul, ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

li {
  margin-bottom: 4px;
}

/* Index page: table links list */
ul li a {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
}

/* ---- Back link / navigation ---- */
p > a[href="index.html"],
p > a[href="./index.html"] {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

p > a[href="index.html"]::before,
p > a[href="./index.html"]::before {
  content: "\2190\00a0";
}

/* ---- Footer ---- */
footer, .footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
}