:root {
  color-scheme: dark;

  --bg: #101114;
  --panel: #181a20;
  --panel-soft: #12151b;
  --code-bg: #0b0c10;

  --text: #eeeeee;
  --muted: #a8adba;
  --link: #74c7ff;
  --border: #303442;

  --accent-blue: #74c7ff;
  --accent-green: #73d99f;
  --accent-yellow: #ffb454;

  --radius: 12px;
  --max-width: 980px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
}

header {
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-top: 0;
}

h2 {
  margin-top: 2.2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

h3 {
  margin-top: 1.6rem;
}

p,
li {
  color: var(--muted);
}

strong {
  color: var(--text);
}

a {
  color: var(--link);
}

a:hover {
  text-decoration-thickness: 2px;
}

.page-nav {
  margin-bottom: 1.5rem;
}

.grid,
.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.quick-grid {
  margin: 1rem 0 1.5rem 0;
}

section,
article,
.toc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

article {
  margin-bottom: 2rem;
}

section {
  margin-bottom: 1rem;
}

.toc {
  margin-bottom: 1.5rem;
}

.toc h2 {
  margin-top: 0;
  border-bottom: none;
  padding-bottom: 0;
}

.toc ul {
  margin: 0.5rem 0 0 1.2rem;
  padding: 0;
}

.toc li {
  margin: 0.3rem 0;
}

.note,
.warning,
.tip {
  border-left: 4px solid var(--accent-blue);
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  background: var(--panel-soft);
  border-radius: 8px;
}

.warning {
  border-left-color: var(--accent-yellow);
}

.tip {
  border-left-color: var(--accent-green);
}

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.compact-table {
  min-width: 620px;
}

th,
td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: #141820;
  color: var(--text);
}

td {
  color: var(--muted);
}

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

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

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.inline-code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1rem 0.35rem;
  white-space: nowrap;
  color: var(--text);
}

.diagram {
  margin: 1rem 0 1.5rem 0;
}

.diagram pre {
  margin: 0;
}

.diagram-img {
  display: block;
  width: 100%;
  max-width: 760px;
  margin: 1rem 0 1.5rem 0;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.muted {
  color: var(--muted);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

@media (max-width: 700px) {
  body {
    padding: 1rem;
  }

  table,
  .compact-table {
    min-width: 0;
  }

  th,
  td {
    padding: 0.6rem;
  }

  section,
  article,
  .toc {
    padding: 1rem;
  }
}