:root{--bg:#f8fafc;--card:#fff;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;--accent:#0891b2;--code:#f1f5f9;--thumb:#cbd5e1}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#020617;--card:#0f172a;--text:#e2e8f0;--muted:#94a3b8;--border:#1e293b;--accent:#22d3ee;--code:#1e293b;--thumb:#334155}}
:root[data-theme="dark"]{--bg:#020617;--card:#0f172a;--text:#e2e8f0;--muted:#94a3b8;--border:#1e293b;--accent:#22d3ee;--code:#1e293b;--thumb:#334155}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent)}
.wrap{width:100%;max-width:64rem;margin:0 auto;padding:1.5rem 1rem 3rem;flex:1}
.top{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;font-size:.875rem;margin-bottom:1.25rem}
.crumbs{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.5rem;overflow-wrap:anywhere}
@media (min-width:640px){.card{padding:2.5rem}}
.eyebrow{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;margin:0}
h1{font-size:1.9rem;line-height:1.2;margin:.35rem 0 1.25rem;letter-spacing:-.01em}
.prose h2{font-size:1.4rem;margin:2.2rem 0 .75rem}
.prose h3{font-size:1.15rem;margin:1.6rem 0 .5rem}
.prose h4{font-size:1rem;margin:1.3rem 0 .4rem}
.prose p,.prose ul,.prose ol{margin:0 0 1rem}
.prose li{margin:.25rem 0}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--code);padding:.1em .35em;border-radius:6px;font-size:.9em}
.prose pre{background:var(--code);padding:1rem;border-radius:12px;overflow-x:auto;border:1px solid var(--border);margin:0 0 1.2rem}
.prose pre code{background:none;padding:0;font-size:.85rem}
.prose table{border-collapse:collapse;width:100%;display:block;overflow-x:auto;font-size:.9rem;margin:0 0 1.2rem}
.prose th,.prose td{border:1px solid var(--border);padding:.5rem .75rem;text-align:left;vertical-align:top}
.prose th{background:var(--code)}
.prose blockquote{margin:1rem 0;padding:.5rem 1rem;border-left:4px solid var(--accent);color:var(--muted);background:var(--code);border-radius:0 8px 8px 0}
.prose img{max-width:100%;height:auto;border-radius:12px}
.prose hr{border:0;border-top:1px solid var(--border);margin:2rem 0}
.pager{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem;flex-wrap:wrap}
.pager a{flex:1 1 14rem;border:1px solid var(--border);border-radius:12px;padding:.85rem 1rem;text-decoration:none;background:var(--card);color:var(--text)}
.pager a:hover{border-color:var(--accent)}
.pager small{display:block;color:var(--muted);font-size:.75rem}
.pager .next{text-align:right;margin-left:auto}
.sections{display:grid;gap:1rem;grid-template-columns:1fr}
@media (min-width:640px){.sections{grid-template-columns:repeat(3,1fr)}}
.sections a{display:block;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.25rem;text-decoration:none;color:var(--text)}
.sections a:hover{border-color:var(--accent)}
.sections small{display:block;color:var(--muted);font-size:.8rem}
footer{text-align:center;font-size:.75rem;color:var(--muted);padding:1.5rem 0 2rem}
/* Menu lateral da turma: no celular é um bloco recolhível acima do conteúdo; no computador, uma coluna ao lado. */
.layout{display:block}
.main{min-width:0}
.menu-mobile{background:var(--card);border:1px solid var(--border);border-radius:12px;margin:0 0 1.25rem;padding:0}
.menu-mobile summary{cursor:pointer;font-weight:600;padding:.8rem 1rem;list-style:none}
.menu-mobile summary::-webkit-details-marker{display:none}
.menu-mobile summary small{display:inline;font-weight:400;color:var(--muted)}
.menu-mobile summary::after{content:"▾";float:right;color:var(--muted);transform:rotate(-90deg);transition:transform .2s}
.menu-mobile[open] summary::after{transform:none}
.menu-mobile nav{padding:0 .5rem .6rem;display:flex;flex-direction:column;gap:.2rem;max-height:60vh;overflow-y:auto}
.menu-desktop{display:none}
.menu-desktop .menu-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;margin:0 0 .5rem}
.menu-desktop nav{display:flex;flex-direction:column;gap:.2rem}
.menu-desktop a,.menu-mobile a{display:block;padding:.55rem .75rem;border-radius:10px;text-decoration:none;color:var(--text);border:1px solid transparent;line-height:1.35;font-size:.92rem}
.menu-desktop a:hover,.menu-mobile a:hover{background:var(--card);border-color:var(--border)}
.menu-desktop a.current,.menu-mobile a.current{background:var(--card);border-color:var(--accent);color:var(--accent);font-weight:600}
.menu-group{margin:.9rem 0 .2rem .75rem;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700}
.menu-desktop small,.menu-mobile small{display:block;font-size:.7rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
@media (min-width:768px){
  .layout.has-menu{display:grid;grid-template-columns:16rem minmax(0,1fr);gap:1.5rem;align-items:start}
  .menu-mobile{display:none}
  .menu-desktop{display:block;position:sticky;top:1.5rem;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1rem .75rem;max-height:calc(100vh - 3rem);overflow-y:auto}
}
/* Barra de rolagem discreta: fina, sem trilho, na cor do tema. */
html,.menu-desktop,.menu-mobile nav{scrollbar-width:thin;scrollbar-color:var(--thumb) transparent}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--thumb);border-radius:999px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:var(--muted);background-clip:content-box}
::-webkit-scrollbar-corner{background:transparent}