:root {
  --accent: #0d9488;
  --fg: #1f2937;
  --muted: #6b7280;
  --bg: #fbfaf7;
  --side-bg: #f0ece5;
  --line: #e2dfd7;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 Georgia, "Times New Roman", "DejaVu Serif", serif;
  display: flex;
  min-height: 100vh;
}

.side {
  width: 220px;
  background: var(--side-bg);
  border-right: 1px solid var(--line);
  padding: 32px 22px;
  flex-shrink: 0;
}

.side .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.side .brand .logo {
  width: 30px;
  height: 30px;
  border-radius: 5px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: ui-monospace, monospace;
}

.side .brand-name {
  margin: 0;
  font-weight: 700;
  font-size: 16px;
  color: var(--fg);
  letter-spacing: 0.01em;
}

.side .sub {
  margin: 0 0 22px;
  font-size: 13px;
  color: var(--accent);
  font-style: italic;
}

.side ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.side li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--muted);
}

.side li.active {
  color: var(--fg);
  font-weight: 600;
}

.side a {
  color: var(--muted);
  text-decoration: none;
}

.side a:hover { color: var(--accent); }

.ver {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
  word-break: break-all;
}

article {
  flex: 1;
  padding: 48px 44px;
  max-width: 720px;
}

article h1 {
  margin: 0 0 6px;
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

article .lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 16px;
}

article .lead strong {
  color: var(--accent);
  font-weight: 700;
}

article h2 {
  margin: 30px 0 12px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--muted);
}

dl.routes {
  margin: 0;
  border-top: 1px solid var(--line);
}

dl.routes dt {
  padding: 12px 0 4px;
  font-weight: 700;
  color: var(--accent);
  font-family: ui-monospace, monospace;
  font-size: 14px;
}

dl.routes dd {
  margin: 0 0 12px;
  padding: 0 0 12px;
  color: var(--fg);
  font-size: 15px;
  border-bottom: 1px solid var(--line);
}

article p {
  font-size: 15px;
  color: var(--fg);
  line-height: 1.65;
}

article a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}

article footer {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
  word-break: break-all;
}

@media (max-width: 720px) {
  body { flex-direction: column; }
  .side {
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 22px;
  }
  .side ul { margin-bottom: 14px; }
  article { padding: 28px 22px; }
}