:root {
  --paper: #FBFAF7; --ink: #221D12; --muted: #6B6455; --line: #E4DFD3;
  --sun: #C97A10; --sun-soft: #F6E7CC; --water: #0E7490; --water-soft: #D9EEF3;
  --card: #F4F1E9; --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #1C1915; --ink: #F2EEE6; --muted: #A39A88; --line: #38332A;
    --sun: #E9A83C; --sun-soft: #3A2E17; --water: #38B6C9; --water-soft: #12333A;
    --card: #26221C; }
}

* { box-sizing: border-box; }
body { background: var(--paper); color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif;
  margin: 0; -webkit-font-smoothing: antialiased; }
main { max-width: 860px; margin: 0 auto; padding: 0 24px 96px; }
.prose { max-width: 700px; }

.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--sun); }
a.crumb { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); text-decoration: none;
  display: inline-block; margin-top: 28px; }
a.crumb:hover { color: var(--sun); }
h1 { font-size: clamp(40px, 7vw, 64px); line-height: 1.02; letter-spacing: -0.02em;
  font-weight: 750; margin: 8px 0 16px; text-wrap: balance;
  font-stretch: condensed; text-transform: uppercase; }
h1.ch { font-size: clamp(32px, 5.5vw, 48px); }
h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 6px;
  text-wrap: balance; }
h3 { font-size: 17px; font-weight: 650; margin: 28px 0 6px; }
p { margin: 0 0 14px; }
a { color: var(--water); }
strong { font-weight: 650; }

header { padding: 40px 0 28px; }
.thesis { font-size: 19px; color: var(--muted); max-width: 640px; }

section { border-top: 1px solid var(--line); padding: 44px 0 8px; margin-top: 44px; }
.secno { font-family: var(--mono); font-size: 13px; color: var(--muted); display: block;
  margin-bottom: 10px; }
.opt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--water); border: 1px solid var(--water);
  border-radius: 4px; padding: 1px 8px; vertical-align: middle; margin-left: 8px; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px; margin: 28px 0; }
.kpi { background: var(--card); border-radius: 8px; padding: 16px 16px 14px; }
.kpi .v { font-family: var(--mono); font-size: 27px; font-weight: 600;
  font-variant-numeric: tabular-nums; }
.kpi .v small { font-size: 14px; color: var(--muted); font-weight: 400; }
.kpi .l { font-size: 12.5px; color: var(--muted); margin-top: 4px; line-height: 1.45; }
.kpi.sun .v { color: var(--sun); } .kpi.water .v { color: var(--water); }

.chart { margin: 20px 0 28px; }
.chart .title { font-weight: 650; font-size: 15px; }
.chart .sub { font-size: 13px; color: var(--muted); margin: 2px 0 14px; }
.row { display: grid; grid-template-columns: minmax(150px, 240px) 1fr 84px;
  gap: 12px; align-items: center; margin: 7px 0; }
.row .lab { font-size: 13.5px; line-height: 1.3; }
.row .val { font-family: var(--mono); font-size: 13px; text-align: right;
  font-variant-numeric: tabular-nums; white-space: nowrap; }
.track { position: relative; height: 20px; background: var(--card); border-radius: 4px;
  overflow: hidden; }
.bar { position: absolute; top: 0; bottom: 0; border-radius: 4px; background: var(--sun); }
.bar.w { background: var(--water); } .bar.g { background: var(--muted); opacity: 0.55; }
.note { font-size: 13px; color: var(--muted); margin-top: 10px; }

figure { margin: 28px 0; }
figure svg { width: 100%; height: auto; display: block; }
figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
.nodebox { fill: var(--card); stroke: var(--line); rx: 6; }
.nodesun { fill: var(--sun-soft); stroke: var(--sun); }
.nodewater { fill: var(--water-soft); stroke: var(--water); }
.nodedash { stroke-dasharray: 5 4; }
.slab { font: 600 13px var(--mono); fill: var(--ink); }
.ssub { font: 11px var(--mono); fill: var(--muted); }
.wire { stroke: var(--muted); stroke-width: 1.6; fill: none; }
.wiresun { stroke: var(--sun); } .wirewater { stroke: var(--water); }
.wiredash { stroke-dasharray: 5 4; }

table { border-collapse: collapse; width: 100%; font-size: 14.5px; margin: 18px 0; }
th { text-align: left; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); font-weight: 500;
  border-bottom: 1px solid var(--line); padding: 8px 10px 8px 0; }
td { border-bottom: 1px solid var(--line); padding: 8px 10px 8px 0; }
td.n { font-family: var(--mono); text-align: right; font-variant-numeric: tabular-nums;
  white-space: nowrap; }
tr.group td { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); padding-top: 18px; }
tr.subtotal td { color: var(--muted); font-style: italic; }
tr.total td { font-weight: 700; border-bottom: none; border-top: 2px solid var(--ink); }
.tablewrap { overflow-x: auto; }

.pull { border-left: 3px solid var(--water); padding: 4px 0 4px 18px; margin: 26px 0;
  font-size: 18px; line-height: 1.5; max-width: 620px; }
.pull b { color: var(--water); }

.speclist { list-style: none; padding: 0; margin: 14px 0; max-width: 700px; }
.speclist li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14.5px;
  display: grid; grid-template-columns: minmax(140px, 220px) 1fr; gap: 16px; }
.speclist .k { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--muted); padding-top: 2px; }

.chapgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px; margin: 24px 0; }
.chap { display: block; background: var(--card); border-radius: 8px;
  padding: 16px 16px 14px; text-decoration: none; color: var(--ink);
  border: 1px solid transparent; }
.chap:hover { border-color: var(--sun); }
.chap .n { font-family: var(--mono); font-size: 12px; color: var(--sun);
  letter-spacing: 0.1em; }
.chap .t { font-weight: 650; font-size: 16px; margin: 4px 0 4px; }
.chap .d { font-size: 13px; color: var(--muted); line-height: 1.45; }

nav.pager { display: flex; justify-content: space-between; gap: 16px;
  border-top: 1px solid var(--line); margin-top: 56px; padding-top: 20px; }
nav.pager a { font-family: var(--mono); font-size: 13px; text-decoration: none;
  color: var(--water); max-width: 45%; }
nav.pager a:hover { color: var(--sun); }

footer { border-top: 1px solid var(--line); margin-top: 64px; padding-top: 20px;
  font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }