/* ============================================================
   A Horders Conversation — shared stylesheet
   Identity: a quiet reading-room archive you dig down through.
   Type: IBM Plex Serif (headings) · IBM Plex Sans (body) · IBM Plex Mono (index/labels)
   ============================================================ */

:root{
  --paper:#F2F1EB;        /* warm grey paper */
  --paper-2:#ECEBE3;
  --ink:#1E1F23;          /* near-black, faintly warm */
  --ink-soft:#65665F;
  --line:#D8D6CC;
  --surface:#FBFAF5;

  --indigo:#3A3E86;       /* structure / links */
  --indigo-deep:#292C66;
  --indigo-soft:#E6E6F1;
  --ochre:#BB8324;        /* "you are here" / active highlight */
  --ochre-soft:#F1E6CC;

  --radius:14px;
  --shadow:0 1px 2px rgba(30,31,35,.05), 0 12px 30px rgba(30,31,35,.06);
  --maxw:840px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:"IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size:18px; line-height:1.62; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px;}
.wrap.wide{max-width:1020px;}

h1,h2,h3,h4{font-family:"IBM Plex Serif", Georgia, serif; line-height:1.12; letter-spacing:-.01em; margin:0;}
h1{font-size:clamp(2.1rem,5.6vw,3.4rem); font-weight:600;}
h2{font-size:clamp(1.5rem,3.6vw,2rem); font-weight:600;}
h3{font-size:1.25rem; font-weight:600;}
h4{font-size:1.05rem; font-weight:600;}
p{margin:0 0 1.05em;}

a{color:var(--indigo); text-decoration-thickness:1px; text-underline-offset:3px; text-decoration-color:rgba(58,62,134,.35);}
a:hover{text-decoration-color:var(--indigo);}
strong{font-weight:600; color:var(--ink);}
em{font-style:italic;}

.mono{font-family:"IBM Plex Mono", ui-monospace, monospace;}

/* ---------- top bar / brand ---------- */
.topbar{padding:1.6rem 0 0;}
.brand{font-family:"IBM Plex Mono",monospace; font-size:.78rem; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-soft); text-decoration:none; display:inline-flex; align-items:center; gap:.6rem;}
.brand:hover{color:var(--indigo);}
.brand .sq{width:11px; height:11px; background:var(--indigo); display:inline-block; border-radius:2px;}

/* ---------- depth indicator (signature) ---------- */
.depth{display:flex; align-items:center; flex-wrap:wrap; gap:.55rem; margin:1.5rem 0 0; font-family:"IBM Plex Mono",monospace; font-size:.72rem; letter-spacing:.04em;}
.depth-node{padding:.3rem .65rem; border:1px solid var(--line); border-radius:999px; color:var(--ink-soft); background:var(--surface); white-space:nowrap;}
.depth-node.is-done{color:var(--indigo-deep); border-color:var(--indigo-soft); background:var(--indigo-soft);}
.depth-node.is-active{color:#fff; background:var(--ochre); border-color:var(--ochre);}
.depth-arrow{color:var(--line);}

/* ---------- breadcrumbs ---------- */
.crumbs{font-family:"IBM Plex Mono",monospace; font-size:.74rem; letter-spacing:.02em; color:var(--ink-soft); margin:2rem 0 .2rem;}
.crumbs a{color:var(--ink-soft); text-decoration:none;}
.crumbs a:hover{color:var(--indigo); text-decoration:underline;}
.crumbs .sep{opacity:.5; padding:0 .35rem;}

/* ---------- landing hero ---------- */
.hero{padding:clamp(2.4rem,6vw,4rem) 0 1rem;}
.eyebrow{font-family:"IBM Plex Mono",monospace; font-size:.74rem; letter-spacing:.2em; text-transform:uppercase; color:var(--ochre); display:block; margin-bottom:1.3rem;}
.hero h1{margin-bottom:.5em; max-width:16ch;}
.hero .lead{font-size:clamp(1.1rem,2.1vw,1.3rem); color:var(--ink-soft); max-width:60ch; line-height:1.5;}
.kick{font-family:"IBM Plex Mono",monospace; font-size:.78rem; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-soft); margin:2.6rem 0 1rem;}

/* ---------- entry cards ---------- */
.entries{display:grid; gap:1rem; grid-template-columns:1fr;}
@media(min-width:620px){ .entries{grid-template-columns:1fr 1fr;} }
.entry{
  display:block; text-decoration:none; color:inherit; background:var(--surface);
  border:1px solid var(--line); border-radius:var(--radius); padding:1.4rem 1.5rem;
  box-shadow:var(--shadow); transition:transform .15s ease, border-color .15s ease;
}
.entry:hover{transform:translateY(-3px); border-color:var(--indigo);}
.entry .idx{font-family:"IBM Plex Mono",monospace; font-size:.74rem; color:var(--ochre); letter-spacing:.08em; display:block; margin-bottom:.5rem;}
.entry h3{margin-bottom:.3rem;}
.entry p{font-size:.97rem; color:var(--ink-soft); margin:0;}
.entry .go{font-family:"IBM Plex Mono",monospace; font-size:.8rem; color:var(--indigo); margin-top:.9rem; display:inline-block;}
.entry.alt{background:var(--indigo-soft); border-color:var(--indigo-soft);}
.entry.alt:hover{border-color:var(--indigo);}

.entries.secondary{margin-top:1rem;}

/* ---------- generic section ---------- */
.section{padding:clamp(2.4rem,5vw,3.4rem) 0; border-top:1px solid var(--line);}
.section:first-of-type{border-top:none;}
.intro{max-width:62ch; color:var(--ink-soft);}
.intro.dark{color:var(--ink);}

.page-head{padding:.4rem 0 1.4rem;}
.page-head h1{margin-bottom:.35em;}
.page-head .sub{font-size:1.12rem; color:var(--ink-soft); max-width:60ch;}

/* ---------- hub subsections ---------- */
.block{padding:1.9rem 0; border-top:1px solid var(--line);}
.block:first-of-type{border-top:none; padding-top:1rem;}
.block h2{margin-bottom:.5em;}
.block p{max-width:64ch;}
.block ul{max-width:64ch; padding-left:1.1rem; margin:0 0 1.05em;}
.block li{margin-bottom:.5em;}
.exact{
  display:inline-flex; align-items:center; gap:.5rem; font-family:"IBM Plex Mono",monospace;
  font-size:.82rem; letter-spacing:.02em; text-decoration:none; color:var(--indigo);
  border:1px solid var(--indigo-soft); background:var(--indigo-soft); border-radius:999px;
  padding:.42rem .9rem; margin-top:.4rem; transition:background .15s ease, color .15s ease;
}
.exact:hover{background:var(--indigo); color:#fff;}
.exact .arrow{font-weight:700;}
.seealso{margin-top:1.2rem; font-size:.95rem; color:var(--ink-soft);}
.seealso a{font-weight:500;}

/* ---------- transcript index ---------- */
.tlist{list-style:none; padding:0; margin:1.8rem 0 0; border-top:1px solid var(--line);}
.tlist li{border-bottom:1px solid var(--line);}
.tlist a{display:flex; gap:1rem; align-items:baseline; padding:1.1rem .3rem; text-decoration:none; color:var(--ink);}
.tlist a:hover{background:var(--surface);}
.tlist .tn{font-family:"IBM Plex Mono",monospace; font-size:.8rem; color:var(--ochre); flex:0 0 auto; width:3.2rem;}
.tlist .tq{font-size:1rem;}
.tlist .tq small{display:block; color:var(--ink-soft); font-size:.85rem; font-family:"IBM Plex Mono",monospace; margin-top:.15rem;}

/* ---------- companion cards ---------- */
.comp{display:flex; flex-direction:column; gap:1rem; margin-top:1.9rem;}
.comp a{
  display:block; text-decoration:none; color:inherit; background:var(--surface);
  border:1px solid var(--line); border-radius:var(--radius); padding:1.3rem 1.5rem; box-shadow:var(--shadow);
  transition:transform .15s ease, border-color .15s ease;
}
.comp a:hover{transform:translateY(-2px); border-color:var(--indigo);}
.comp .ext{font-family:"IBM Plex Mono",monospace; font-size:.72rem; letter-spacing:.08em; text-transform:uppercase; color:var(--ochre); display:block; margin-bottom:.45rem;}
.comp h3{margin-bottom:.25rem;}
.comp p{font-size:.96rem; color:var(--ink-soft); margin:0;}

/* ---------- transcript turn (terminal) ---------- */
.turnmeta{font-family:"IBM Plex Mono",monospace; font-size:.78rem; letter-spacing:.06em; color:var(--ink-soft); margin-bottom:.6rem;}
.turnmeta .big{color:var(--ochre);}
.qa{margin-top:1.4rem;}
.q{
  background:var(--indigo-soft); border-left:4px solid var(--indigo); border-radius:0 12px 12px 0;
  padding:1.1rem 1.3rem 1.15rem; margin-bottom:2rem;
}
.q .qlab{font-family:"IBM Plex Mono",monospace; font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--indigo-deep); display:block; margin-bottom:.45rem;}
.q p{margin:0; color:var(--ink); font-size:1.05rem;}
.q p + p{margin-top:.6rem;}

.a .alab{font-family:"IBM Plex Mono",monospace; font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-soft); display:block; margin-bottom:1rem;}
.a h3{margin:1.8rem 0 .5em;}
.a h4{margin:1.4rem 0 .35em;}
.a ul{padding-left:1.15rem; margin:0 0 1.05em;}
.a li{margin-bottom:.55em;}
.a blockquote{margin:1.1em 0; padding:.4em 0 .4em 1.1em; border-left:3px solid var(--line); color:var(--ink-soft); font-style:italic;}
.footerline{font-family:"IBM Plex Mono",monospace; font-size:.74rem; color:var(--ink-soft); background:var(--paper-2); border:1px solid var(--line); border-radius:8px; padding:.6rem .8rem; margin-top:1.8rem; word-break:break-word;}

.note{background:var(--ochre-soft); border:1px solid #E4D2A6; border-radius:12px; padding:1rem 1.25rem; font-size:.96rem; color:#6c5418; margin:1.6rem 0;}

/* ---------- turn nav ---------- */
.turnnav{display:flex; justify-content:space-between; gap:1rem; margin-top:2.6rem; padding-top:1.4rem; border-top:1px solid var(--line); font-family:"IBM Plex Mono",monospace; font-size:.82rem;}
.turnnav a{text-decoration:none; color:var(--indigo);}
.turnnav a:hover{text-decoration:underline;}
.turnnav .disabled{color:var(--line); pointer-events:none;}

/* ---------- footer ---------- */
footer.site{border-top:1px solid var(--line); margin-top:1rem; padding:2.2rem 0 3.4rem; color:var(--ink-soft); font-size:.85rem;}
footer.site p{margin:0 0 .5em; max-width:66ch;}
footer.site a{color:var(--indigo);}
.backhome{font-family:"IBM Plex Mono",monospace; font-size:.8rem;}

/* ---------- a11y / motion ---------- */
a:focus-visible, .entry:focus-visible, .comp a:focus-visible, .exact:focus-visible{outline:3px solid var(--ochre); outline-offset:2px; border-radius:4px;}
.js .reveal{opacity:0; transform:translateY(14px);}
.js .reveal.in{opacity:1; transform:none; transition:opacity .6s ease, transform .6s ease;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .js .reveal,.js .reveal.in{opacity:1; transform:none; transition:none;}
  *{transition:none !important;}
}
@media (max-width:560px){ body{font-size:17px;} }