/* ============================================================
   Subsurface World Model — shared static-site stylesheet.

   Every public page links this file. The design stays dependency-free:
   one stylesheet, one small script, no tracking, no framework.
   ============================================================ */

:root{
  color-scheme:dark;
  --bg:#07090c;
  --bg2:#0d1218;
  --panel:#101720;
  --panel2:#131c26;
  --ink:#edf2f7;
  --read:#bdc7d4;
  --dim:#8d98a7;
  --dimmer:#6f7a88;
  --ghost:#5d6875;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --accent:#4ade80;
  --accent2:#38bdf8;
  --warm:#f5b759;
  --accent-soft:rgba(74,222,128,.30);
  --accent2-soft:rgba(56,189,248,.28);
  --warm-soft:rgba(245,183,89,.24);
  --accent-wash:rgba(74,222,128,.07);
  --hover:#ffffff;
  --plate:#ffffff;
  --shadow:0 20px 70px rgba(0,0,0,.28);

  /* Brand mark; the light block below flips the value structure. */
  --mk-b0:#1b2734; --mk-b1:#0e161e; --mk-b2:#05080b;
  --mk-c0:#f2f7fa; --mk-c1:#dbe7ef; --mk-c2:#c3d4e0;
  --mk-o0:.58; --mk-o1:.30; --mk-o2:.09;
  --mk-arc:#cfe0ec; --mk-arc-o:.15;
  --mk-rim:#a9c8db; --mk-rim-o:.80;

  /* Hero background art; the light file is swapped in by the token blocks below. */
  --hero-img:url("/hero-dark.svg");

  /* Read by the header canvas so the art follows the theme. */
  --field-a:74,222,128;
  --field-b:56,189,248;
  --field-well:232,234,237;
  --field-opacity:.36;

  --w-prose:820px;
  --w-wide:1160px;
  --w-note:1100px;

  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}

@media(prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    color-scheme:light;
    --bg:#fbfbfa;
    --bg2:#f2f5f6;
    --panel:#ffffff;
    --panel2:#eef3f5;
    --ink:#10151c;
    --read:#394452;
    --dim:#5b6674;
    --dimmer:#6d7783;
    --ghost:#8b939d;
    --line:rgba(16,21,28,.12);
    --line-strong:rgba(16,21,28,.20);
    --accent:#157a3b;
    --accent2:#036b9d;
    --warm:#9a5a00;
    --accent-soft:rgba(21,122,59,.30);
    --accent2-soft:rgba(3,107,157,.26);
    --warm-soft:rgba(154,90,0,.20);
    --accent-wash:rgba(21,122,59,.07);
    --hover:#071018;
    --plate:#ffffff;
    --shadow:0 22px 70px rgba(32,45,58,.12);
    --mk-b0:#ffffff; --mk-b1:#f7fafc; --mk-b2:#e9eff4;
    --mk-c0:#16303d; --mk-c1:#2b4d5f; --mk-c2:#4a6a7c;
    --mk-o0:.46; --mk-o1:.24; --mk-o2:.07;
    --mk-arc:#16303d; --mk-arc-o:.16;
    --mk-rim:#16303d; --mk-rim-o:.88;
    --hero-img:url("/hero-light.svg");
    --field-a:21,122,59;
    --field-b:3,107,157;
    --field-well:31,42,54;
    --field-opacity:.22;
  }
}

:root[data-theme="light"]{
  color-scheme:light;
  --bg:#fbfbfa;
  --bg2:#f2f5f6;
  --panel:#ffffff;
  --panel2:#eef3f5;
  --ink:#10151c;
  --read:#394452;
  --dim:#5b6674;
  --dimmer:#6d7783;
  --ghost:#8b939d;
  --line:rgba(16,21,28,.12);
  --line-strong:rgba(16,21,28,.20);
  --accent:#157a3b;
  --accent2:#036b9d;
  --warm:#9a5a00;
  --accent-soft:rgba(21,122,59,.30);
  --accent2-soft:rgba(3,107,157,.26);
  --warm-soft:rgba(154,90,0,.20);
  --accent-wash:rgba(21,122,59,.07);
  --hover:#071018;
  --plate:#ffffff;
  --shadow:0 22px 70px rgba(32,45,58,.12);
    --mk-b0:#ffffff; --mk-b1:#f7fafc; --mk-b2:#e9eff4;
  --mk-c0:#16303d; --mk-c1:#2b4d5f; --mk-c2:#4a6a7c;
  --mk-o0:.46; --mk-o1:.24; --mk-o2:.07;
  --mk-arc:#16303d; --mk-arc-o:.16;
  --mk-rim:#16303d; --mk-rim-o:.88;
  --hero-img:url("/hero-light.svg");
  --field-a:21,122,59;
  --field-b:3,107,157;
  --field-well:31,42,54;
  --field-opacity:.22;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:
    linear-gradient(180deg,rgba(var(--field-b),.035),transparent 360px),
    var(--bg);
  color:var(--read);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit}
::selection{background:var(--accent-soft);color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
html:focus-within{scroll-behavior:smooth}

.skip-link{
  position:absolute;
  left:18px;
  top:12px;
  z-index:20;
  transform:translateY(-150%);
  background:var(--ink);
  color:var(--bg);
  border-radius:8px;
  padding:8px 12px;
  text-decoration:none;
  font-weight:700;
}
.skip-link:focus{transform:none}

.wrap{max-width:var(--w-prose);margin:0 auto;padding:0 28px}
.wrap.wide{max-width:var(--w-wide)}
.wrap.note{max-width:var(--w-note)}

/* ============================================================
   Navigation and theme
   ============================================================ */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
  margin:18px 0 0;
  padding:12px 12px 12px 16px;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--bg2);
  background:color-mix(in srgb,var(--bg2) 88%,transparent);
  box-shadow:0 14px 50px rgba(0,0,0,.12);
}
.topbar .brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:0;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
  white-space:nowrap;
}
.brandmark{
  width:21px;
  height:21px;
  flex:0 0 auto;
  display:block;
}
.topbar nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
  gap:8px;
}
.topbar nav a{
  min-height:30px;
  display:inline-flex;
  align-items:center;
  border-radius:7px;
  padding:4px 9px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--dim);
  text-decoration:none;
  transition:background .18s,color .18s;
}
.topbar nav a:hover,
.topbar nav a[aria-current="page"]{
  background:var(--accent-wash);
  color:var(--ink);
}

.themer{
  width:30px;
  height:30px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  border:1px solid var(--line);
  border-radius:7px;
  background:var(--panel);
  color:var(--dim);
  cursor:pointer;
  padding:0;
  transition:color .18s,border-color .18s,background .18s;
}
.themer:hover{color:var(--accent);border-color:var(--accent-soft);background:var(--bg2)}
.themer svg{
  width:15px;
  height:15px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.7;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.themer .sun{display:none}
:root[data-theme="light"] .themer .sun{display:block}
:root[data-theme="light"] .themer .moon{display:none}
@media(prefers-color-scheme:light){
  :root:not([data-theme="dark"]) .themer .sun{display:block}
  :root:not([data-theme="dark"]) .themer .moon{display:none}
}

/* ============================================================
   Homepage
   ============================================================ */
.hero{
  position:relative;
  overflow:hidden;
  padding:92px 0 200px;   /* the deep bottom band is where the limb sweeps in from the left */
}
#field{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  opacity:var(--field-opacity);
  pointer-events:none;
}
.hero-art{
  opacity:1;
  background:var(--hero-img) right bottom/cover no-repeat;
}
/* The panel is gone from the hero, so the grid collapses to one column and
   the title gets the room to sit on a single line. */
.hero .hero-grid{grid-template-columns:minmax(0,1fr)}
.hero .hero-copy{max-width:none}
.hero h1{
  font-size:clamp(38px,4.5vw,58px);
  max-width:none;
  letter-spacing:-.015em;
}
.hero::after{
  content:"";
  position:absolute;
  inset:auto 0 0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--line-strong),transparent);
}
.hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(340px,.72fr);
  gap:48px;
  align-items:center;
}
.hero-copy{max-width:720px}
.eyebrow,
.kicker{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:0;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:28px;
  height:1px;
  background:var(--accent);
  opacity:.7;
}
h1{
  font-size:62px;
  line-height:1.02;
  font-weight:720;
  letter-spacing:0;
  max-width:12ch;
  margin-bottom:24px;
  color:var(--ink);
}
h1 em{font-style:normal;color:var(--ghost)}
.lede{
  font-size:20px;
  color:var(--read);
  max-width:62ch;
}
.lede strong{color:var(--ink);font-weight:650}
.hero-thesis{
  margin-top:22px;
  max-width:58ch;
  color:var(--dim);
  font-size:17px;
}
.hero-thesis span{
  display:block;
  color:var(--ink);
  font-weight:700;
}
.hero-panel{
  border:1px solid var(--line-strong);
  border-radius:8px;
  background:var(--panel);
  background:
    linear-gradient(180deg,rgba(var(--field-b),.08),transparent 48%),
    linear-gradient(145deg,var(--panel),color-mix(in srgb,var(--panel2) 72%,transparent));
  box-shadow:var(--shadow);
  padding:18px;
  min-height:450px;
}
.panel-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
}
.panel-top span{
  font-family:var(--mono);
  font-size:12px;
  color:var(--dimmer);
  text-transform:uppercase;
}
.panel-top strong{
  color:var(--ink);
  font-size:14px;
  text-align:right;
}
.subsurface-card{
  position:relative;
  height:250px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:8px;
  background:
    linear-gradient(180deg,rgba(var(--field-b),.12) 0 14%,rgba(71,59,42,.16) 14% 100%),
    linear-gradient(180deg,var(--bg2),var(--panel2));
}
.subsurface-card::before{
  content:"";
  position:absolute;
  inset:14% 0 auto;
  height:1px;
  background:rgba(var(--field-well),.55);
}
.surface-line{
  position:absolute;
  left:0;
  right:0;
  top:14%;
  height:42px;
  background:linear-gradient(180deg,rgba(245,183,89,.16),transparent);
}
.well{
  position:absolute;
  top:8%;
  width:2px;
  height:75%;
  background:linear-gradient(180deg,rgba(var(--field-well),.85),rgba(var(--field-well),.15));
}
.well::after{
  content:"";
  position:absolute;
  left:-4px;
  bottom:-3px;
  width:10px;
  height:5px;
  border-radius:5px;
  background:var(--accent);
}
.well-a{left:28%}
.well-b{right:25%;height:62%}
.horizon{
  position:absolute;
  left:7%;
  right:7%;
  height:2px;
  border-radius:8px;
  background:linear-gradient(90deg,transparent,rgba(var(--field-a),.78),rgba(var(--field-b),.72),transparent);
}
.horizon::after{
  content:"";
  position:absolute;
  inset:-12px 0;
  background:linear-gradient(90deg,transparent,rgba(var(--field-b),.11),rgba(var(--field-a),.10),transparent);
}
.horizon.h1{top:31%;transform:rotate(-1deg)}
.horizon.h2{top:46%;transform:rotate(1.3deg)}
.horizon.h3{top:63%;transform:rotate(-2.1deg)}
.horizon.h4{top:82%;transform:rotate(1.7deg)}
.cloud{
  position:absolute;
  left:11%;
  right:11%;
  height:22px;
  border-radius:8px;
  background:repeating-linear-gradient(90deg,rgba(var(--field-b),.12),rgba(var(--field-b),.12) 18px,transparent 18px,transparent 32px);
  opacity:.7;
}
.cloud.c1{top:55%}
.cloud.c2{top:73%;left:18%;right:16%;opacity:.55}
.belief-stack{
  margin-top:14px;
  display:grid;
  gap:8px;
}
.belief-stack div{
  display:flex;
  justify-content:space-between;
  gap:12px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:9px 11px;
  background:rgba(255,255,255,.025);
}
.belief-stack span{
  font-family:var(--mono);
  font-size:12px;
  color:var(--dimmer);
  text-transform:uppercase;
}
.belief-stack b{
  color:var(--read);
  font-size:13px;
  font-weight:600;
  text-align:right;
}

main{position:relative}
section{
  padding:78px 0;
  border-top:1px solid var(--line);
}
section.band{
  background:var(--bg2);
  background:
    linear-gradient(180deg,rgba(255,255,255,.018),transparent),
    color-mix(in srgb,var(--bg2) 58%,transparent);
}
.split{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(320px,1fr);
  gap:46px;
  align-items:start;
}
.section-head{max-width:640px}
.section-head.narrow{max-width:760px}
.kicker{
  color:var(--dimmer);
  margin-bottom:14px;
}
h2{
  font-size:34px;
  line-height:1.16;
  font-weight:720;
  letter-spacing:0;
  margin-bottom:18px;
  max-width:24ch;
  color:var(--ink);
}
.section-head p{
  color:var(--dim);
  max-width:66ch;
}
.section-head p+p{margin-top:16px}
.section-head strong{color:var(--ink);font-weight:650}
.m{font-family:var(--mono);font-size:.94em;color:var(--ink)}

.more,
.mail{
  display:inline-flex;
  align-items:center;
  margin-top:26px;
  color:var(--accent);
  text-decoration:none;
  border-bottom:1px solid var(--accent-soft);
  padding-bottom:2px;
  font-family:var(--mono);
  font-size:13px;
  transition:color .18s,border-color .18s;
}
.more:hover,
.mail:hover{color:var(--hover);border-color:var(--hover)}

.stat-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}
.stat{
  min-height:132px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:18px;
  background:linear-gradient(160deg,var(--panel),rgba(255,255,255,.015));
}
.stat span{
  display:block;
  color:var(--ink);
  font-size:30px;
  line-height:1;
  font-weight:760;
  margin-bottom:12px;
}
.stat:nth-child(2) span{color:var(--accent)}
.stat:nth-child(4) span{color:var(--warm)}
.stat p{
  color:var(--dim);
  font-size:14px;
  line-height:1.45;
}

/* Definition callout — the one-paragraph "what an SWM is", right under the hero */
.defn-section{border-top:none;padding-top:44px}
.defn{
  position:relative;
  border:1px solid var(--line-strong);
  border-left:2px solid var(--accent);
  border-radius:0 10px 10px 0;
  background:
    linear-gradient(135deg,rgba(var(--field-a),.08),transparent 55%),
    var(--panel);
  box-shadow:var(--shadow);
  padding:30px 34px;
}
.defn .lbl{
  font-family:var(--mono);
  font-size:12px;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:10px;
}
.defn .lbl::before{content:"";width:28px;height:1px;background:var(--accent);opacity:.7}
.defn p{font-size:19px;line-height:1.56;color:var(--read)}
.defn p+p{margin-top:14px}
.defn strong{color:var(--ink);font-weight:650}
@media(max-width:680px){
  .defn{padding:22px 20px}
  .defn p{font-size:17px}
}

/* ============================================================
   Shared components
   ============================================================ */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:14px;
  margin:32px 0 0;
}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  border:1px solid var(--line);
  border-radius:8px;
  padding:22px 20px;
  background:
    linear-gradient(180deg,rgba(255,255,255,.024),transparent),
    var(--panel);
  min-width:0;
}
.card .n{
  font-family:var(--mono);
  font-size:12px;
  color:var(--dimmer);
  letter-spacing:0;
  margin-bottom:13px;
  text-transform:uppercase;
}
.card h3{
  font-size:18px;
  line-height:1.25;
  font-weight:700;
  margin-bottom:9px;
  color:var(--ink);
}
.card p{
  font-size:14px;
  color:var(--dim);
  line-height:1.58;
}
.card.hard{
  border-color:var(--accent-soft);
  box-shadow:inset 0 0 0 1px rgba(74,222,128,.04);
}
.card.hard h3{color:var(--accent)}
.card.tall{min-height:250px}
a.card{
  text-decoration:none;
  display:block;
  transition:border-color .18s ease,transform .18s ease,background .18s ease;
}
a.card:hover{
  border-color:var(--accent-soft);
  transform:translateY(-2px);
  background:linear-gradient(180deg,var(--panel2),var(--panel));
}
a.card .go{
  display:inline-block;
  margin-top:14px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--accent);
}

.eq{
  margin:0;
  padding:30px 28px;
  border:1px solid var(--line);
  border-radius:8px;
  background:
    linear-gradient(180deg,rgba(var(--field-b),.06),transparent),
    var(--panel);
  font-family:var(--mono);
  text-align:center;
  max-width:760px;
}
.eq .math{
  font-size:23px;
  color:var(--ink);
  line-height:1.5;
}
.eq .a{color:var(--accent2)}
.eq .b{color:var(--accent)}
.eq .legend{
  margin-top:18px;
  font-size:12px;
  color:var(--dimmer);
  line-height:1.95;
  text-align:left;
}
.eq.small .math{font-size:18px}
.flow-eq{align-self:stretch;display:flex;flex-direction:column;justify-content:center}
.var{font-style:italic;color:var(--ink)}
.term-x{color:var(--accent2);font-weight:700}
.term-y{color:var(--accent);font-weight:700}

.principles{
  display:grid;
  gap:12px;
}
.principles div{
  border:1px solid var(--line);
  border-radius:8px;
  padding:18px;
  background:var(--panel);
}
.principles span{
  display:block;
  font-family:var(--mono);
  font-size:12px;
  color:var(--dimmer);
  margin-bottom:10px;
}
.principles b{
  display:block;
  color:var(--ink);
  font-size:18px;
  margin-bottom:6px;
}
.principles p{
  color:var(--dim);
  font-size:14px;
  line-height:1.5;
}

.ops{
  margin-top:28px;
  display:grid;
  gap:11px;
  max-width:76ch;
  list-style:none;
}
.ops-grid{
  max-width:none;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:12px;
}
.ops li{
  display:grid;
  grid-template-columns:30px minmax(0,1fr);
  gap:12px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:16px;
  background:var(--panel);
  font-size:14px;
  color:var(--dim);
  line-height:1.55;
}
.ops .n{
  font-family:var(--mono);
  font-size:12px;
  color:var(--dimmer);
  padding-top:2px;
}
.ops b{color:var(--ink);font-weight:700}

.program-note{
  margin-top:26px;
  max-width:78ch;
  color:var(--dim);
  font-size:15px;
}
.program-note strong{color:var(--ink);font-weight:650}

.paths{
  margin-top:32px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:18px;
  background:var(--panel);
  font-size:13.5px;
  color:var(--dim);
  line-height:1.9;
  max-width:100%;
}
.paths .lbl{
  display:block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:0;
  text-transform:uppercase;
  color:var(--dimmer);
  margin-bottom:4px;
}
.paths b{color:var(--ink);font-weight:650}
.subnav{
  margin-top:22px;
  font-family:var(--mono);
  font-size:13px;
  display:flex;
  gap:18px;
  flex-wrap:wrap;
}
.subnav a{
  color:var(--accent);
  text-decoration:none;
  border-bottom:1px solid var(--accent-soft);
  padding-bottom:1px;
  transition:color .18s,border-color .18s;
}
.subnav a:hover{color:var(--hover);border-color:var(--hover)}
.notes-section{border-top:none;padding-top:0}

.contact-section{border-top:none;padding-top:84px}
.contact-card{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:end;
  gap:28px;
  border:1px solid var(--line-strong);
  border-radius:8px;
  padding:30px;
  background:
    linear-gradient(135deg,rgba(var(--field-a),.10),transparent 50%),
    var(--panel);
  box-shadow:var(--shadow);
}
.contact-card h2{max-width:28ch}
.contact-card p{
  color:var(--dim);
  max-width:68ch;
}

.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .7s ease,transform .7s ease;
}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  a.card{transition:none}
  html{scroll-behavior:auto}
}

/* ============================================================
   Note pages
   ============================================================ */
.note-layout{
  max-width:var(--w-note);
  margin:0 auto;
  padding:0 28px;
  display:grid;
  grid-template-columns:224px minmax(0,1fr);
  gap:54px;
  align-items:start;
}
.note-layout>main{min-width:0}

.toc{
  position:sticky;
  top:24px;
  padding:34px 0 0;
  font-size:13px;
}
.toc summary{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0;
  text-transform:uppercase;
  color:var(--dimmer);
  margin-bottom:14px;
  cursor:pointer;
  list-style:none;
  padding:2px 0;
  transition:color .18s;
}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:" \25B4";opacity:.7}
.toc details:not([open]) summary::after{content:" \25BE"}
.toc summary:hover{color:var(--ink)}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t;margin:0}
.toc a{
  display:block;
  padding:7px 0 7px 28px;
  position:relative;
  color:var(--dim);
  text-decoration:none;
  line-height:1.38;
  border-radius:6px;
  transition:color .18s,background .18s;
}
.toc a::before{
  content:counter(t,decimal-leading-zero);
  position:absolute;
  left:6px;
  top:7px;
  font-family:var(--mono);
  font-size:11px;
  color:var(--dimmer);
}
.toc a:hover{color:var(--ink);background:var(--accent-wash)}
.toc a[aria-current="page"]{
  color:var(--accent);
  background:var(--accent-wash);
}
.toc a[aria-current="page"]::before{color:var(--accent)}
.toc .extra{
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.toc .extra a{
  padding-left:0;
  font-family:var(--mono);
  font-size:12px;
}
.toc .extra a::before{content:none}

.note-head{padding:42px 0 30px}
.note-head h1{
  font-size:46px;
  line-height:1.08;
  font-weight:720;
  letter-spacing:0;
  color:var(--ink);
  max-width:20ch;
  margin-bottom:0;
}
.dek{
  font-size:19px;
  color:var(--dim);
  max-width:62ch;
  margin-top:20px;
}
.dek strong{color:var(--ink);font-weight:650}

article{
  padding:18px 0 8px;
  border-top:1px solid var(--line);
  margin-top:8px;
}
article>p{margin:0 0 18px;max-width:68ch}
article h2{
  font-size:30px;
  line-height:1.2;
  font-weight:720;
  letter-spacing:0;
  color:var(--ink);
  margin:48px 0 16px;
  max-width:27ch;
}
article h3{
  font-size:19px;
  line-height:1.3;
  font-weight:700;
  color:var(--ink);
  margin:32px 0 10px;
}
article strong{color:var(--ink);font-weight:700}
article em{color:var(--ink);font-style:italic}
article ul,
article ol{margin:0 0 18px;padding-left:22px;max-width:66ch}
article li{margin:8px 0}
article li::marker{color:var(--dimmer)}
article a{
  color:var(--accent2);
  text-decoration:none;
  border-bottom:1px solid var(--accent2-soft);
  transition:color .18s,border-color .18s;
}
article a:hover{color:var(--hover);border-color:var(--hover)}
.lead{
  font-size:19px;
  color:var(--ink);
  max-width:64ch;
}

.pull{
  margin:34px 0;
  padding:22px 24px;
  border-left:2px solid var(--accent);
  background:var(--panel);
  border-radius:0 8px 8px 0;
  color:var(--ink);
  font-size:18px;
  line-height:1.52;
  max-width:66ch;
}
.pull cite{
  display:block;
  margin-top:12px;
  font-size:13px;
  color:var(--dimmer);
  font-style:normal;
  font-family:var(--mono);
}

.aside{
  margin:28px 0;
  padding:18px 20px;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--panel);
  font-size:14.5px;
  color:var(--dim);
  max-width:68ch;
}
.aside .h{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0;
  text-transform:uppercase;
  color:var(--dimmer);
  margin-bottom:8px;
}
.aside b,
.aside strong{color:var(--ink);font-weight:700}

.fig{margin:36px 0}
.plate{
  background:var(--plate);
  border:1px solid var(--line);
  border-radius:8px;
  padding:12px;
  overflow-x:auto;
}
.plate svg{display:block;width:100%;height:auto}
.fig figcaption{
  margin-top:13px;
  font-size:13px;
  color:var(--dimmer);
  max-width:66ch;
  line-height:1.6;
}
.fig figcaption b{color:var(--dim)}

.tblwrap{overflow-x:auto;margin:28px 0;border:1px solid var(--line);border-radius:8px}
.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:560px;background:var(--panel)}
.tbl th,
.tbl td{
  text-align:left;
  padding:13px 15px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
  color:var(--read);
}
.tbl th{
  color:var(--dim);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0;
  text-transform:uppercase;
  font-weight:650;
  white-space:nowrap;
}
.tbl td strong{color:var(--ink)}
.tbl tr:last-child td{border-bottom:none}
.tbl tr.hl td{background:var(--accent-wash)}
.tbl tr.hl td:first-child{box-shadow:inset 2px 0 0 var(--accent)}

.gl dt{
  font-family:var(--mono);
  color:var(--accent);
  font-size:15px;
  margin-top:26px;
  font-weight:650;
}
.gl dd{margin:7px 0 0;color:var(--read);max-width:66ch}
.gl dd+dd{margin-top:4px}

.nnav{
  display:flex;
  justify-content:space-between;
  gap:18px;
  margin:54px 0 0;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.nnav a{
  font-family:var(--mono);
  font-size:13px;
  color:var(--dim);
  text-decoration:none;
  max-width:47%;
  transition:color .18s;
}
.nnav a:hover{color:var(--accent)}
.nnav .lbl{
  display:block;
  color:var(--dimmer);
  font-size:11px;
  letter-spacing:0;
  text-transform:uppercase;
  margin-bottom:6px;
}
.nnav .next{text-align:right;margin-left:auto}

/* ============================================================
   Footer
   ============================================================ */
footer{
  border-top:1px solid var(--line);
  padding:34px 0 48px;
  margin-top:40px;
  font-size:13px;
  color:var(--dimmer);
}
footer p{max-width:66ch}
footer a{color:var(--dim);text-decoration:none;border-bottom:1px solid var(--line)}

/* ============================================================
   Responsive
   ============================================================ */
@media(max-width:1100px){
  .grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ops-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ops-grid li:last-child{grid-column:1 / -1}
}
@media(max-width:940px){
  .hero{padding:68px 0 72px}
  .hero-grid,
  .split{
    grid-template-columns:minmax(0,1fr);
  }
  .hero-panel{min-height:auto}
  h1{font-size:50px}
  h2{font-size:30px}
  .note-layout{
    grid-template-columns:minmax(0,1fr);
    gap:0;
    padding:0 28px;
  }
  .toc{
    position:static;
    padding:22px 0 18px;
    border-bottom:1px solid var(--line);
  }
  .toc summary{
    display:block;
    font-size:11px;
    padding:4px 0;
  }
  .toc summary::after{content:" \25BE";color:var(--dimmer)}
  .toc details[open] summary::after{content:" \25B4"}
  .toc details>ol,
  .toc details>.extra{margin-top:12px}
  .contact-card{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:680px){
  .wrap,
  .wrap.wide,
  .wrap.note,
  .note-layout{padding-left:18px;padding-right:18px}
  .topbar{
    flex-direction:column;
    align-items:flex-start;
    gap:12px;
    margin-top:12px;
  }
  .topbar nav{justify-content:flex-start}
  .hero{padding:54px 0 56px}
  h1{font-size:40px;max-width:11ch}
  h2{font-size:27px}
  .lede{font-size:18px}
  section{padding:56px 0}
  .hero-panel{padding:14px}
  .subsurface-card{height:210px}
  .stat-grid,
  .grid.four,
  .ops-grid,
  .grid.two{grid-template-columns:minmax(0,1fr)}
  .ops-grid li:last-child{grid-column:auto}
  .belief-stack div{display:block}
  .belief-stack b{display:block;text-align:left;margin-top:3px}
  .note-head{padding:30px 0 24px}
  .note-head h1{font-size:34px}
  .dek{font-size:17px}
  article h2{font-size:26px;margin-top:38px}
  .pull{font-size:17px;padding:20px}
  .nnav{display:grid}
  .nnav a{max-width:none}
  .nnav .next{text-align:left;margin-left:0}
}