:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-sidebar: #f9fafb;
  --text: #1f2328;
  --text-soft: #57606a;
  --border: #d0d7de;
  --link: #0969da;
  --accent: #0969da;
  --code-bg: #f6f8fa;
  --code-text: #24292f;
  --quote-bg: #f6f8fa;
  --quote-border: #d0d7de;
  --table-stripe: #f6f8fa;
  --sidebar-w: 250px;
  --rightbar-w: 220px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-soft: #161b22;
    --bg-sidebar: #0d1117;
    --text: #e6edf3;
    --text-soft: #9198a1;
    --border: #30363d;
    --link: #4493f8;
    --accent: #4493f8;
    --code-bg: #161b22;
    --code-text: #e6edf3;
    --quote-bg: #161b22;
    --quote-border: #30363d;
    --table-stripe: #161b22;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 1rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout ------------------------------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--rightbar-w);
  max-width: 1400px;
  margin: 0 auto;
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  padding: 1.5rem 1rem;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
}
.brand {
  font-weight: 700;
  font-size: .95rem;
  margin: 0 0 1rem;
  color: var(--text);
}
.sidebar nav ul { list-style: none; margin: 0; padding: 0; }
.sidebar nav li { margin: .15rem 0; }
.sidebar nav a {
  display: block;
  padding: .4rem .6rem;
  border-radius: 6px;
  color: var(--text-soft);
  font-size: .92rem;
}
.sidebar nav a:hover { background: var(--bg-soft); text-decoration: none; }
.sidebar nav a.active {
  background: var(--bg-soft);
  color: var(--accent);
  font-weight: 600;
  border-left: 3px solid var(--accent);
}
.content { padding: 2.5rem 3rem; min-width: 0; }
.doc { max-width: 820px; }
.rightbar { padding: 2.5rem 1rem; }
.onthispage {
  position: sticky;
  top: 2.5rem;
  font-size: .85rem;
}
.onthispage-title {
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: .72rem;
  color: var(--text-soft);
  margin: 0 0 .5rem;
}
.onthispage ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.onthispage li a { display: block; padding: .2rem .75rem; color: var(--text-soft); }
.onthispage li a:hover { color: var(--accent); text-decoration: none; }
.onthispage .toc-l3 a { padding-left: 1.5rem; font-size: .8rem; }

/* Topbar (mobile) ---------------------------------------------------- */
.topbar { display: none; }
.nav-toggle { display: none; }

/* Tipografia --------------------------------------------------------- */
.doc h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 1rem; padding-bottom: .3rem; border-bottom: 1px solid var(--border); }
.doc h2 { font-size: 1.45rem; margin: 2.2rem 0 .8rem; padding-bottom: .3rem; border-bottom: 1px solid var(--border); }
.doc h3 { font-size: 1.15rem; margin: 1.8rem 0 .6rem; }
.doc h4 { font-size: 1rem; margin: 1.4rem 0 .5rem; }
.doc p { margin: .8rem 0; }
.doc img { max-width: 100%; }

/* Código ------------------------------------------------------------- */
code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
}
:not(pre) > code {
  background: var(--code-bg);
  padding: .15em .4em;
  border-radius: 5px;
  border: 1px solid var(--border);
}
pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 1rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow-x: auto;
  line-height: 1.5;
}
pre code { background: none; border: none; padding: 0; }

/* Tabelas ------------------------------------------------------------ */
.doc table {
  border-collapse: collapse;
  margin: 1.1rem 0;
  width: 100%;
  display: block;
  overflow-x: auto;
}
.doc th, .doc td { border: 1px solid var(--border); padding: .5rem .75rem; text-align: left; }
.doc th { background: var(--bg-soft); font-weight: 600; }
.doc tbody tr:nth-child(even) { background: var(--table-stripe); }

/* Blockquotes / callouts -------------------------------------------- */
.doc blockquote {
  margin: 1.1rem 0;
  padding: .6rem 1rem;
  background: var(--quote-bg);
  border-left: 4px solid var(--quote-border);
  border-radius: 0 6px 6px 0;
  color: var(--text-soft);
}
.doc blockquote p { margin: .3rem 0; }

/* Listas de tarefa --------------------------------------------------- */
.doc li.task { list-style: none; margin-left: -1.2rem; }
.doc li.task input { margin-right: .5rem; }

/* Rodapé ------------------------------------------------------------- */
.foot {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-soft);
  font-size: .85rem;
}

/* Responsivo --------------------------------------------------------- */
@media (max-width: 1080px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .rightbar { display: none; }
  .content { padding: 2rem; }
}
@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; }
  .topbar {
    display: flex;
    align-items: center;
    gap: .75rem;
    position: sticky;
    top: 0;
    z-index: 20;
    padding: .6rem 1rem;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
  }
  .topbar-title { font-weight: 600; font-size: .95rem; }
  .nav-btn { cursor: pointer; font-size: 1.3rem; line-height: 1; padding: .2rem .5rem; }
  .sidebar {
    display: none;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle:checked ~ .layout .sidebar { display: block; }
  .content { padding: 1.5rem 1.2rem; }
}