:root {
  --bg: #f7f7f9;
  --panel: #ffffff;
  --ink: #101113;
  --muted: #5f6368;
  --accent: #111111;
  --line: #e6e6ea;
  --link: #0b5fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.52;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
}

header {
  background: var(--accent);
  color: #fff;
  padding: 20px 0;
  border-bottom: 3px solid var(--link);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 20px;
  font-size: 0.94rem;
  transition: opacity 0.2s;
}

nav a:hover {
  opacity: 0.8;
}

.badge {
  display: inline-block;
  background: var(--link);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 500;
  margin-top: 8px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  margin: 14px 0;
}

.card h2 {
  margin-top: 0;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent);
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 16px;
  margin-bottom: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  margin: 20px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  background: var(--bg);
  font-weight: 600;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

a:hover {
  text-decoration: underline;
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

ul, ol {
  padding-left: 24px;
}

li {
  margin: 6px 0;
}

code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 0.9em;
}

pre {
  background: var(--bg);
  padding: 14px;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--line);
}

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

.rubric {
  margin: 16px 0;
}

.rubric-item {
  padding: 10px;
  border-left: 3px solid var(--link);
  margin: 8px 0;
  background: var(--bg);
}

.craft-term {
  margin: 20px 0;
  padding: 16px;
  background: var(--bg);
  border-left: 4px solid var(--accent);
}

.craft-term h4 {
  margin: 0 0 8px 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.craft-label {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.8rem;
  margin-right: 6px;
  margin-bottom: 6px;
}

footer {
  margin-top: 60px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}