:root {
  color-scheme: dark;
  --bg: #090b0c;
  --surface: #111415;
  --raised: #171a1b;
  --line: #2b2f30;
  --text: #f5f3ee;
  --muted: #8d9390;
  --accent: #f47a2a;
  --danger: #f25587;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Avenir Next", Avenir, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(9, 11, 12, 0.94);
}

.brand img {
  width: 170px;
  display: block;
  filter: invert(1) brightness(1.35);
}

nav,
.document-nav div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

a,
button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 13px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

button.active,
a:hover,
button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.shell {
  width: min(100%, 1180px);
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 18px;
  margin: 0 auto;
  padding: 34px 24px 70px;
}

.document-nav,
.document-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.document-nav {
  align-self: start;
  display: grid;
  gap: 12px;
  padding: 18px;
}

.document-nav div {
  flex-direction: column;
}

.document-panel {
  padding: 28px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.status {
  margin: 0 0 10px;
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 560;
  line-height: 1.05;
}

.meta {
  margin: 12px 0 24px;
  color: var(--muted);
}

.document-body {
  display: grid;
  gap: 12px;
  line-height: 1.6;
}

.document-body h2,
.document-body h3 {
  margin: 18px 0 0;
}

.document-body p,
.document-body ul,
.document-body blockquote,
.document-body pre {
  margin: 0;
}

.document-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  color: var(--muted);
}

.document-body pre {
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #090b0c;
  white-space: pre-wrap;
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px;
  }

  .shell {
    padding: 24px 14px 54px;
  }
}