/* ============================================================
   Pegasus4i — shared site system
   One container. One masthead. One footer. One type scale.
   Per-page: set --axis in a page <style> block; write only the
   components unique to that page.
   ============================================================ */

:root{
  /* surfaces */
  --bg:#06080E; --bg2:#0A0D16; --surface:#0F1220; --surface2:#14182A;
  --border:rgba(255,255,255,0.07); --border2:rgba(255,255,255,0.10);

  /* ink */
  --text:#EDE8DF; --body:#B8B0A2; --dim:#8B849B; --vdim:#5F5A70;

  /* HOT — the only three accents. H=amber, O=blue, T=teal. */
  --amber:#C8922A; --amber2:#E8B84B;
  --ibmi:#2E8AB0;
  --teal:#1A9E8A;
  /* failure state only — never a category */
  --red:#C0563A;

  /* the page's own axis; overridden per page */
  --axis:var(--amber);

  --mono:'IBM Plex Mono',monospace;
  --serif:'Cormorant Garamond',serif;
  --sans:'Syne',sans-serif;

  --container:1000px;
  --measure:64ch;
  --gutter:clamp(24px,4vw,60px);
  --radius:12px;
}

*,*::before,*::after{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  background:var(--bg); color:var(--text);
  font-family:var(--serif); font-weight:300; line-height:1.6;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
body::after{
  content:''; position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(ellipse 55% 40% at 82% 4%, rgba(46,138,176,0.07) 0%, transparent 58%),
    radial-gradient(ellipse 50% 38% at 10% 92%, rgba(200,146,42,0.05) 0%, transparent 56%);
}
img,svg{ max-width:100%; }

/* one container, every page (.wrap is the legacy alias on the axis pages) */
.page,.wrap{ position:relative; z-index:1; max-width:var(--container); margin:0 auto; padding:0 var(--gutter); }
.measure{ max-width:var(--measure); }

a{ color:var(--amber); text-decoration:none; }
a:hover{ color:var(--amber2); }
:focus-visible{ outline:2px solid var(--amber2); outline-offset:3px; }

/* ── MASTHEAD (.hdr / .hdr-logo are the legacy aliases on the axis pages) ── */
.mast,.hdr{ display:flex; align-items:center; justify-content:space-between; gap:24px; max-width:var(--container); margin:0 auto; padding:26px var(--gutter) 0; }
.page > .mast,.page > .hdr,.wrap > .mast,.wrap > .hdr{ padding-left:0; padding-right:0; }
.mast-logo,.hdr-logo{ font-family:var(--sans); font-size:17px; font-weight:800; letter-spacing:0.01em; color:var(--text); flex:none; }
.mast-logo:hover,.hdr-logo:hover{ color:var(--text); }
.mast-logo .four,.hdr-logo .four{ color:var(--ibmi); }
.mast-back{ font-family:var(--mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase; color:var(--dim); white-space:nowrap; }
.mast-back:hover{ color:var(--amber2); }

/* site nav — hover is ALWAYS amber, on every page */
.snav{ display:flex; gap:24px; align-items:center; }
.snav a{
  font-family:var(--mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--dim); white-space:nowrap; padding-bottom:3px;
  border-bottom:1px solid transparent; transition:color .2s, border-color .2s;
}
.snav a:hover{ color:var(--text); }
.snav a.on{ color:var(--text); border-bottom-color:var(--amber); }

.snav-hot{ position:relative; }
.snav-hot > button{
  font-family:var(--mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--dim); background:none; border:0; padding:0 0 3px; cursor:pointer;
  display:flex; align-items:center; gap:6px; transition:color .2s;
}
.snav-hot > button:hover,.snav-hot.open > button,.snav-hot.here > button{ color:var(--text); }
.snav-hot > button .car{ font-size:8px; transition:transform .2s; }
.snav-hot.open > button .car{ transform:rotate(180deg); }
.snav-menu{
  position:absolute; top:calc(100% + 12px); left:-16px; min-width:248px;
  background:var(--bg2); border:1px solid var(--border2); border-radius:8px; padding:8px;
  opacity:0; visibility:hidden; transform:translateY(-4px);
  transition:opacity .18s, transform .18s, visibility .18s; z-index:60;
}
.snav-hot.open .snav-menu{ opacity:1; visibility:visible; transform:translateY(0); }
.snav-menu a{
  display:flex; gap:11px; align-items:baseline; padding:10px 12px; border-radius:5px;
  text-transform:none; letter-spacing:0.02em; font-size:12px; color:var(--body); border:0;
}
.snav-menu a:hover{ background:rgba(255,255,255,0.035); color:var(--text); }
.snav-menu a .ax{ font-family:var(--mono); font-size:11px; width:11px; flex:none; }
.snav-menu a.h .ax{ color:var(--amber); }
.snav-menu a.o .ax{ color:var(--ibmi); }
.snav-menu a.t .ax{ color:var(--teal); }
.snav-menu a .txt{ display:block; }
.snav-menu a .sub{ display:block; font-family:var(--mono); font-size:10px; color:var(--dim); margin-top:3px; }

.mast-burger{
  display:none; font-family:var(--mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--text); background:none; border:1px solid var(--border2); border-radius:5px;
  padding:9px 12px; cursor:pointer;
}
.mnav{ display:none; flex-direction:column; gap:2px; margin:14px auto 0; max-width:var(--container); border:1px solid var(--border2); border-radius:8px; overflow:hidden; }
.mnav.open{ display:flex; }
.mnav a{
  background:var(--surface); padding:15px 18px; font-family:var(--mono);
  font-size:12px; letter-spacing:0.1em; text-transform:uppercase; color:var(--text);
}
.mnav a.h{ color:var(--amber); } .mnav a.o{ color:var(--ibmi); } .mnav a.t{ color:var(--teal); }
@media(max-width:880px){
  .snav{ display:none; }
  .mast-burger{ display:block; }
}

/* ── TYPE SCALE — one scale, every page ─────────────────── */
.eyebrow{
  font-family:var(--mono); font-size:10px; letter-spacing:0.2em; text-transform:uppercase;
  color:var(--dim); display:flex; align-items:center; gap:14px;
}
.eyebrow.axis{ color:var(--axis); }
.eyebrow .n{ color:var(--axis); }
.eyebrow::after{ content:''; flex:none; width:44px; height:1px; background:currentColor; opacity:0.45; }

h1,.h-page{
  font-family:var(--serif); font-weight:300; font-size:clamp(42px,7vw,80px);
  line-height:1.02; letter-spacing:-0.018em;
}
h2,.h-sec{
  font-family:var(--serif); font-weight:300; font-size:clamp(32px,4.6vw,52px);
  line-height:1.08; letter-spacing:-0.015em; max-width:22ch;
}
h3,.h-sub{
  font-family:var(--serif); font-weight:300; font-size:clamp(24px,2.8vw,32px);
  line-height:1.16; max-width:28ch;
}
h1 em,h2 em,h3 em,.h-page em,.h-sec em,.h-sub em{ font-style:italic; color:var(--axis); }

.lead{ font-size:clamp(19px,2.3vw,23px); line-height:1.55; color:var(--body); max-width:60ch; }
p{ font-size:clamp(17px,2vw,19px); line-height:1.68; color:var(--body); max-width:var(--measure); }
p strong,.lead strong{ color:var(--text); font-weight:400; }
.small{ font-size:15px; line-height:1.62; }
.note{ font-family:var(--mono); font-size:11px; letter-spacing:0.05em; line-height:1.7; color:var(--dim); }

/* ── FIGURES ────────────────────────────────────────────── */
.figure{ margin:clamp(32px,5vh,54px) 0 0; }
.figure svg,.figure img{ display:block; width:100%; height:auto; }
/* diagrams render at their container width so their labels clear the 10px floor */
figure svg{ width:100%; height:auto; }
/* a diagram wider than the text column breaks out of it */
.wide-fig{ width:100vw; max-width:1320px; position:relative; left:50%; transform:translateX(-50%); padding:0 var(--gutter); }
.fig-cap{ font-family:var(--mono); font-size:10px; letter-spacing:0.18em; text-transform:uppercase; color:var(--dim); margin-top:18px; }
.fig-line{ font-family:var(--serif); font-style:italic; font-size:clamp(18px,2.3vw,23px); color:var(--text); margin-top:10px; line-height:1.4; max-width:44ch; }

/* ── CARD — one card, three axis modifiers ─────────────── */
.card{
  padding:clamp(28px,4vw,40px);
  background:var(--surface); border:1px solid var(--border2);
  border-left:3px solid var(--axis); border-radius:0 var(--radius) var(--radius) 0;
}
.card--h{ --axis:var(--amber); }
.card--o{ --axis:var(--ibmi); }
.card--t{ --axis:var(--teal); }
.card .eyebrow{ color:var(--axis); margin-bottom:16px; }

/* ── PULL QUOTE ─────────────────────────────────────────── */
.pull{ padding:clamp(40px,7vh,72px) 0; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.pull p{
  font-family:var(--serif); font-weight:300; font-size:clamp(26px,4.4vw,44px);
  line-height:1.22; letter-spacing:-0.01em; color:var(--text); max-width:22ch;
}
.pull p em{ font-style:italic; color:var(--axis); }
.pull-src{ font-family:var(--mono); font-size:10px; letter-spacing:0.2em; text-transform:uppercase; color:var(--dim); margin-top:28px; }

/* ── LINKS & BUTTONS ───────────────────────────────────── */
.inline-go{
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--mono); font-size:11px; letter-spacing:0.11em; text-transform:uppercase;
  color:var(--amber2); border-bottom:1px solid rgba(232,184,75,0.32); padding-bottom:3px;
}
.inline-go .arr{ display:inline-block; transition:transform .2s; }
.inline-go:hover .arr{ transform:translateX(3px); }
.btn{
  display:inline-flex; align-items:center; gap:11px;
  font-family:var(--sans); font-size:15px; font-weight:600;
  padding:15px 28px; border-radius:7px; transition:background .2s, transform .2s;
}
.btn .arr{ font-family:var(--mono); }
.btn-primary{ background:var(--amber); color:var(--bg); }
.btn-primary:hover{ background:var(--amber2); color:var(--bg); transform:translateY(-1px); }
.btn-ghost{ color:var(--axis); border:1px solid color-mix(in oklch, var(--axis) 42%, transparent); background:color-mix(in oklch, var(--axis) 8%, transparent); }
.btn-ghost:hover{ background:color-mix(in oklch, var(--axis) 17%, transparent); border-color:var(--axis); }

/* ── GO-DEEPER DOORS ───────────────────────────────────── */
.deeper{ padding:clamp(40px,7vh,70px) 0; border-top:1px solid var(--border); }
.doors{ display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:12px; margin-top:24px; }
.door{ display:block; padding:22px; background:var(--surface); border:1px solid var(--border); border-radius:9px; transition:border-color .2s, background .2s; }
.door:hover{ border-color:var(--border2); background:var(--surface2); }
.door-t{ font-family:var(--sans); font-weight:600; font-size:15px; color:var(--text); margin-bottom:8px; }
.door-d{ font-size:15px; color:var(--dim); line-height:1.55; }

/* ── SOURCES ────────────────────────────────────────────── */
.sources{ padding:clamp(40px,7vh,70px) 0; border-top:1px solid var(--border); }
.sources ol,.sources ul{ list-style:none; max-width:62ch; }
.sources li{ font-family:var(--mono); font-size:12px; line-height:1.75; color:var(--dim); margin-bottom:14px; }
.sources li strong{ color:var(--body); font-weight:500; }
.sources li sup{ color:var(--amber); margin-right:6px; }

/* ── FOOTER — grouped columns, every page ──────────────── */
.ftr{ margin-top:clamp(70px,11vh,120px); padding:40px 0 52px; border-top:1px solid var(--border); display:block; }
.ftr-right{ display:none; }
.ftr-nav{ display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:32px; margin-bottom:36px; }
.ftr-col{ display:flex; flex-direction:column; gap:11px; }
.ftr-k{ font-family:var(--mono); font-size:10px; letter-spacing:0.2em; text-transform:uppercase; color:var(--dim); margin-bottom:4px; }
.ftr-col a{ font-family:var(--mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color:var(--dim); }
.ftr-col a:hover{ color:var(--amber2); }
.ftr-col a.h:hover{ color:var(--amber); }
.ftr-col a.o:hover{ color:var(--ibmi); }
.ftr-col a.t:hover{ color:var(--teal); }
.ftr-id{ display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:18px; padding-top:24px; border-top:1px solid var(--border); }
.ftr-left{ font-family:var(--sans); font-weight:800; font-size:15px; color:var(--text); }
.ftr-left .four{ color:var(--ibmi); }
.ftr-tag{ font-family:var(--mono); font-size:10px; letter-spacing:0.18em; text-transform:uppercase; color:var(--dim); }

@media(prefers-reduced-motion:reduce){ *{ animation:none!important; transition:none!important; } }