/* Codex — graph-paper field manual */
:root{
  --paper:#F6F7FB; --grid:#E4E8F2; --surface:#FFFFFF; --ink:#1B2233; --muted:#5A6379;
  --hair:#DFE3EC; --acc:#3B47D6; --acc-deep:#2A35A8; --amber:#C77A12; --codebg:#1B2233;
  --mono:"JetBrains Mono",ui-monospace,monospace; --sans:"IBM Plex Sans",system-ui,sans-serif;
}
[data-accent="teal"]{--acc:#1F8A76;--acc-deep:#15695a;}
[data-accent="amber"]{--acc:#C77A12;--acc-deep:#9c5f0d;}
[data-accent="rose"]{--acc:#C0436B;--acc-deep:#992f52;}
[data-accent="violet"]{--acc:#7A2BD6;--acc-deep:#5e1fa8;}
[data-accent="green"]{--acc:#1FA85A;--acc-deep:#178044;}
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;}
body{
  background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:24px 24px; color:var(--ink); font-family:var(--sans); -webkit-font-smoothing:antialiased; line-height:1.6;
}
a{color:var(--acc);text-decoration:none;} a:hover{text-decoration:underline;}

/* topbar */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:16px;
  background:rgba(246,247,251,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--hair);padding:10px 18px;}
.brand{font-family:var(--mono);font-weight:700;font-size:1.05rem;color:var(--ink);text-decoration:none;letter-spacing:.02em;}
.brand-mark{color:var(--acc);} .brand-sub{color:var(--muted);font-weight:400;font-size:.8rem;}
.search{flex:1;max-width:520px;margin-left:auto;}
.search input{width:100%;font-family:var(--sans);font-size:.95rem;padding:9px 14px;border:1px solid var(--hair);border-radius:9px;background:var(--surface);}
.search input:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(59,71,214,.15);}
.navtoggle{display:none;background:var(--surface);border:1px solid var(--hair);border-radius:8px;font-size:1.1rem;padding:6px 11px;cursor:pointer;}

/* layout */
.layout{display:grid;grid-template-columns:264px 1fr;gap:0;max-width:1280px;margin:0 auto;align-items:start;}
.sidebar{position:sticky;top:53px;height:calc(100dvh - 53px);overflow:auto;border-right:1px solid var(--hair);padding:20px 14px;background:rgba(255,255,255,.4);}
.main{min-width:0;padding:0 clamp(18px,4vw,52px);}

/* sidebar tree */
.tree-sec{margin-bottom:6px;}
.tree-sec-h{display:block;font-family:var(--mono);font-weight:600;font-size:.9rem;color:var(--ink);padding:6px 8px;border-radius:7px;}
.tree-sec-h.on,.tree-sec-h:hover{background:rgba(59,71,214,.08);color:var(--acc-deep);text-decoration:none;}
.sec-mark{color:var(--acc);}
.tree-pages{list-style:none;margin:2px 0 8px;padding:0 0 0 14px;border-left:2px solid var(--hair);}
.tree-pages a{display:block;font-size:.9rem;color:var(--muted);padding:4px 8px;border-radius:6px;}
.tree-pages a:hover,.tree-pages a.on{color:var(--acc-deep);background:rgba(59,71,214,.07);text-decoration:none;}
.tree-pages a.on{font-weight:600;}
.tree-sub{list-style:none;margin:0;padding:0 0 0 12px;}
.tree-sub a{font-size:.84rem;}
.tree-empty{color:var(--muted);font-size:.9rem;padding:8px;}

/* doc / content */
.doc{max-width:74ch;padding:30px 0 70px;}
.crumbs{font-family:var(--mono);font-size:.8rem;color:var(--muted);margin-bottom:14px;}
.page-head{margin-bottom:24px;border-bottom:1px solid var(--hair);padding-bottom:18px;}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin:0 0 6px;}
.page-head h1{font-family:var(--mono);font-weight:700;font-size:clamp(1.7rem,4.5vw,2.4rem);line-height:1.1;margin:0;letter-spacing:-.01em;}
.lede{font-size:1.12rem;color:var(--muted);margin:10px 0 0;}
.page-meta{font-family:var(--mono);font-size:.78rem;color:var(--muted);margin:8px 0 0;}
.block-h{font-family:var(--mono);font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px;}

/* home */
.recents{margin:26px 0;}
.recent-row{display:flex;gap:10px;flex-wrap:wrap;}
.recent-card{display:flex;flex-direction:column;gap:3px;background:var(--surface);border:1px solid var(--hair);border-radius:9px;padding:10px 14px;min-width:180px;}
.rc-sec{font-family:var(--mono);font-size:.74rem;color:var(--acc);} .rc-title{font-weight:600;font-size:.95rem;}
.sec-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;}
.sec-card{display:flex;flex-direction:column;gap:5px;background:var(--surface);border:1px solid var(--hair);border-radius:12px;padding:18px;border-top:4px solid var(--acc);transition:transform .15s,box-shadow .15s;}
.sec-card:hover{transform:translateY(-2px);box-shadow:0 10px 28px -16px rgba(27,34,51,.4);text-decoration:none;}
.sec-crest{font-family:var(--mono);font-size:1.3rem;color:var(--acc);}
.sec-card-title{font-weight:700;font-size:1.15rem;color:var(--ink);}
.sec-card-blurb{color:var(--muted);font-size:.92rem;flex:1;}
.sec-card-meta{font-family:var(--mono);font-size:.76rem;color:var(--muted);}
.empty{color:var(--muted);font-style:italic;}

/* section toc */
.toc{list-style:none;counter-reset:t;margin:0;padding:0;}
.toc>li{counter-increment:t;border-bottom:1px solid var(--hair);padding:12px 0;}
.toc-page{font-family:var(--mono);font-weight:600;font-size:1.05rem;}
.toc-page::before{content:counter(t,decimal-leading-zero) "  ";color:var(--acc);}
.toc-sub{list-style:none;margin:6px 0 0;padding:0 0 0 28px;}
.toc-sub a{color:var(--muted);font-size:.95rem;display:inline-block;padding:2px 0;}

/* prose (rendered markdown) */
.prose{font-size:1.04rem;}
.prose h1,.prose h2,.prose h3{font-family:var(--mono);line-height:1.25;scroll-margin-top:70px;}
.prose h2{font-size:1.5rem;margin:1.8em 0 .5em;padding-bottom:.2em;border-bottom:1px solid var(--hair);}
.prose h3{font-size:1.18rem;margin:1.4em 0 .4em;}
.prose p{margin:0 0 1em;} .prose ul,.prose ol{margin:0 0 1em;padding-left:1.4em;} .prose li{margin:.3em 0;}
.prose strong{font-weight:600;}
.prose a{text-decoration:underline;text-underline-offset:2px;}
.prose code{font-family:var(--mono);font-size:.88em;background:rgba(59,71,214,.09);color:var(--acc-deep);padding:.1em .35em;border-radius:5px;}
.prose pre{position:relative;background:var(--codebg);color:#E7EAF3;border-radius:10px;padding:16px 16px;overflow:auto;margin:0 0 1.2em;border:1px solid #2a3450;}
.prose pre code{font-family:var(--mono);font-size:.86rem;background:none;color:inherit;padding:0;}
.prose blockquote{margin:0 0 1.2em;padding:12px 16px;background:var(--surface);border-left:4px solid var(--acc);border-radius:0 9px 9px 0;color:var(--ink);}
.prose blockquote p:last-child{margin-bottom:0;}
.prose table{border-collapse:collapse;width:100%;margin:0 0 1.2em;font-size:.95rem;}
.prose th,.prose td{border:1px solid var(--hair);padding:7px 10px;text-align:left;}
.prose th{background:rgba(59,71,214,.06);font-family:var(--mono);}
.prose img{max-width:100%;border:1px solid var(--hair);border-radius:8px;}
.prose hr{border:none;border-top:1px solid var(--hair);margin:1.6em 0;}
.copy{position:absolute;top:8px;right:8px;font-family:var(--mono);font-size:.72rem;background:#2a3450;color:#cdd5ec;border:none;border-radius:6px;padding:3px 8px;cursor:pointer;opacity:.7;}
.copy:hover{opacity:1;}

/* subpages + pager */
.subpages{margin-top:34px;border-top:1px solid var(--hair);padding-top:18px;}
.subpage-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;}
.subpage{background:var(--surface);border:1px solid var(--hair);border-radius:9px;padding:12px 14px;font-weight:600;}
.subpage:hover{border-color:var(--acc);text-decoration:none;}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:34px;border-top:1px solid var(--hair);padding-top:16px;font-family:var(--mono);font-size:.92rem;}

/* outline rail */
.outline{position:sticky;top:70px;align-self:start;font-size:.86rem;padding:30px 0 0 8px;}
.outline-h{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;}
.outline ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--hair);}
.outline li{padding:0;} .outline a{display:block;color:var(--muted);padding:3px 12px;}
.outline a:hover{color:var(--acc);text-decoration:none;} .outline .lvl3 a{padding-left:24px;font-size:.82rem;}
/* page layout gets a right rail when present */
.main:has(.outline){display:grid;grid-template-columns:1fr 210px;gap:24px;}

/* search */
.results{display:flex;flex-direction:column;gap:10px;}
.result{display:flex;flex-direction:column;gap:3px;background:var(--surface);border:1px solid var(--hair);border-radius:10px;padding:14px 16px;}
.result:hover{border-color:var(--acc);text-decoration:none;}
.result-sec{font-family:var(--mono);font-size:.76rem;color:var(--acc);}
.result-title{font-weight:600;font-size:1.05rem;} .result-ex{color:var(--muted);font-size:.9rem;}

@media (max-width:880px){
  .layout{grid-template-columns:1fr;}
  .sidebar{position:fixed;left:0;top:53px;width:280px;z-index:25;transform:translateX(-100%);transition:transform .2s;background:var(--surface);}
  .sidebar.open{transform:none;box-shadow:0 20px 50px -10px rgba(27,34,51,.4);}
  .navtoggle{display:block;}
  .main:has(.outline){grid-template-columns:1fr;} .outline{display:none;}
}
@media (prefers-reduced-motion:reduce){ *{transition:none!important;} }