/* GHRM manual reader layout - shared by every chapter page.
   Brings the chapters in line with the rest of dirtbert.com and keeps the page calm:
   a clean title block, an "On this page" sidebar, and extra material folded away until asked for. */
:root{
  --r-ink:#2c2d2e; --r-soft:#58595b; --r-mute:#8a8c8e; --r-rule:#d6dfd0; --r-line:#e3e8df;
  --r-green:#5a9e36; --r-green-d:#4a8329; --r-green-dd:#3d6e22; --r-pale:#eef5e9; --r-bg:#f3f7f0;
  --r-sand:#fbf7ef; --r-sand-b:#ead9b8; --r-sand-d:#9a6b1f;
}
body{background:var(--r-bg) !important;color:var(--r-ink);font-family:'Segoe UI',Helvetica,Arial,sans-serif;font-size:16px}

/* floating pills are replaced by the menu bar and the back link */
#dp-nav{display:none !important}

/* ---------- title block (matches the site's page heroes) ---------- */
body > header{background:#fff !important;color:var(--r-ink) !important;padding:40px max(24px, calc((100% - 1132px) / 2)) 36px !important;border-bottom:3px solid var(--r-green);overflow:visible !important}
body > header::after{display:none !important}
body > header .logo-row{display:none !important}
body > header .back-link{display:block;color:var(--r-green-d) !important;opacity:1 !important;font-weight:600;font-size:.88rem;margin-bottom:16px;text-decoration:none}
body > header .back-link:hover{text-decoration:underline}
body > header .eyebrow{color:var(--r-green-d) !important;opacity:1 !important;font-size:.74rem;letter-spacing:.12em;margin-bottom:12px}
body > header h1{color:var(--r-ink) !important;font-size:clamp(1.9rem,3.6vw,2.7rem) !important;line-height:1.08;font-weight:800;letter-spacing:-.01em;max-width:none !important;margin-bottom:12px !important}
body > header .subtitle, body > header p{margin-left:0 !important;color:var(--r-soft) !important;font-size:1.08rem;max-width:68ch;line-height:1.55}
body > header .byline{color:var(--r-mute) !important;opacity:1 !important;font-size:.9rem;margin-top:14px}
body > header .byline strong{color:var(--r-soft)}

/* ---------- two-column reader ---------- */
.wrap{max-width:1180px !important;padding:32px 24px 72px !important}
.r-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}
.r-side{position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto;padding-right:4px}
.r-main{min-width:0;max-width:820px}
.r-side h2{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--r-mute);margin:0 0 10px}
nav.toc{display:block !important;background:none !important;border:0 !important;padding:0 !important;margin:0 !important;font-size:.88rem !important}
nav.toc a{display:block;color:var(--r-soft) !important;text-decoration:none;padding:6px 10px;border-left:2px solid var(--r-line);line-height:1.35}
nav.toc a:hover{color:var(--r-ink) !important;border-left-color:var(--r-green);background:#fff}
nav.toc a.on{color:var(--r-green-d) !important;font-weight:600;border-left-color:var(--r-green);background:#fff}
.r-side .r-tools{margin-top:16px;display:flex;flex-direction:column;gap:6px}
.r-side .r-tools a{font-size:.82rem;color:var(--r-green-d);text-decoration:none;font-weight:600}
.r-side .r-tools a:hover{text-decoration:underline}

/* source line under the title, quieter */
.intro-card{background:none !important;border:0 !important;border-left:3px solid var(--r-rule) !important;border-radius:0 !important;padding:2px 0 2px 14px !important;margin:0 0 22px !important;font-size:.86rem !important;color:var(--r-mute) !important}
.intro-card strong{color:var(--r-soft)}

/* toolbar */
.r-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin:0 0 14px;font-size:.85rem;color:var(--r-mute)}
.r-bar button{font:600 .82rem 'Segoe UI',Helvetica,Arial,sans-serif;background:#fff;color:var(--r-green-d);border:1px solid var(--r-rule);border-radius:4px;padding:6px 12px;cursor:pointer}
.r-bar button:hover{border-color:var(--r-green);background:var(--r-pale)}

/* ---------- sections ---------- */
details.card{border:1px solid var(--r-line) !important;border-radius:8px !important;margin-bottom:10px !important;box-shadow:none !important;background:#fff !important}
details.card[open]{border-color:var(--r-rule) !important;box-shadow:0 2px 10px rgba(44,45,46,.05) !important}
details.card > summary{padding:15px 20px !important;font-size:1.02rem !important;font-weight:700 !important;justify-content:flex-start !important}
details.card > summary .chev{margin-left:auto !important}
details.card > summary:hover{background:#fafcf8 !important}
details.card > summary .r-num{color:var(--r-green-d);margin-right:8px;font-variant-numeric:tabular-nums}
details.card .card-body{color:#3d3f40 !important;font-size:1rem !important;line-height:1.65 !important;padding:18px 22px 24px !important}
details.card .card-body h4{font-size:1.02rem;color:var(--r-ink);margin:22px 0 8px}
details.card.r-extra > summary{color:var(--r-soft) !important;font-weight:600 !important}
details.card.r-extra > summary::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--r-sand-d);opacity:.55;margin-right:10px;flex:none}

/* ---------- extra material folded away ---------- */
details.r-fold{margin:14px 0 6px;border:1px solid var(--r-line);border-radius:6px;background:#fbfcfa}
details.r-fold > summary{list-style:none;cursor:pointer;padding:9px 14px;display:flex;justify-content:flex-start;align-items:center;gap:10px;text-align:left;font-size:.86rem;font-weight:600;color:var(--r-soft)}
details.r-fold > summary::-webkit-details-marker{display:none}
details.r-fold > summary::before{content:"+";display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:var(--r-pale);color:var(--r-green-d);font-weight:700;font-size:.85rem;flex:none}
details.r-fold[open] > summary::before{content:"\2212"}
details.r-fold > summary .r-kind{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--r-mute)}
details.r-fold > summary:hover{color:var(--r-ink)}
details.r-fold > .r-fold-body{padding:2px 14px 14px}
details.r-fold.r-supp{background:var(--r-sand);border-color:var(--r-sand-b)}
details.r-fold.r-supp > summary::before{background:#f3e6cc;color:var(--r-sand-d)}
details.r-fold.r-supp > summary .r-kind{color:var(--r-sand-d)}

/* supplemental boxes: calm sand tone instead of bright orange */
.supp,.supp.rme{background:transparent !important;border:0 !important;border-radius:0 !important;padding:0 !important;margin:0 !important;color:var(--r-ink) !important}
.supp *{color:inherit !important}
.supp .supp-tag{display:none !important}
.supp h4.r-used{display:none !important}
.supp a,.supp a.xref{color:var(--r-green-d) !important}
.supp .src b{color:var(--r-sand-d) !important}
.supp table{background:#fff !important}
.supp th{background:#e9d9b6 !important;color:var(--r-ink) !important}
.supp td{border-color:var(--r-sand-b) !important;background:#fff !important}
.supp tr:nth-child(even) td{background:#fffaf1 !important}
.supp figure,.supp .dp-figs figure{background:#fff !important;border-color:var(--r-sand-b) !important}
.supp .src,.supp .dp-figs{border-top-color:var(--r-sand-b) !important}
.supp .eq{background:#fff !important;border-color:var(--r-sand-b) !important}

/* figure grids inside a fold */
.r-fold .topic-figs,.r-fold .dp-figs{margin:6px 0 0 !important;padding-top:0 !important;border-top:0 !important}
.r-fold .topic-figs-label,.r-fold .dp-figs-label{display:none !important}

/* tables, equations */
table.data-table th{background:var(--r-green-d) !important}
table.data-table tr:nth-child(even) td{background:#f6faf3 !important}

/* footer of the old template */
body > footer{color:var(--r-mute)}
body > footer .logo-mark{display:none}

/* ---------- phones and narrow windows ---------- */
@media (max-width:900px){
  .r-grid{grid-template-columns:1fr;gap:18px}
  .r-side{position:static;max-height:none;overflow:visible}
  .r-side details.r-toc{background:#fff;border:1px solid var(--r-line);border-radius:8px}
  .r-side details.r-toc > summary{list-style:none;cursor:pointer;padding:12px 16px;font-weight:700;font-size:.92rem;display:flex;justify-content:space-between}
  .r-side details.r-toc > summary::after{content:"\25BE";color:var(--r-green-d)}
  .r-side details.r-toc > summary::-webkit-details-marker{display:none}
  .r-side details.r-toc nav.toc{padding:0 8px 10px !important}
  .r-side h2{display:none}
  body > header{padding:28px 16px 26px !important}
  .wrap{padding:20px 16px 56px !important}
}
@media (min-width:901px){
  .r-side details.r-toc > summary{display:none}
}
@media print{
  .r-side,.r-bar{display:none !important}
  .r-grid{display:block}
  details{display:block}
}

.former-note{margin:.6rem 0 .9rem !important}

/* ---------- single column: the section train in the header replaces the "On this page" sidebar ---------- */
.r-grid{grid-template-columns:minmax(0,1fr) !important;gap:0 !important}
.r-side{display:none !important}
.r-main{max-width:none !important;margin:0}

/* ---------- apps that support each chapter (I.3 explains them) ---------- */
.app-card{border-left:4px solid var(--r-green) !important}
.app-card>summary .app-n{display:inline-block;margin-left:10px;font:600 .72rem/1.6 'Segoe UI',Helvetica,Arial,sans-serif;background:var(--r-green);color:#fff;border-radius:10px;padding:0 8px;vertical-align:2px}
.app-intro{margin:0 0 10px;font-size:.92rem;color:var(--r-soft)}
ul.app-list{list-style:none;margin:0 !important;padding:0 !important;display:grid;gap:8px}
ul.app-list li{margin:0}
a.app-go{display:grid;grid-template-columns:62px minmax(0,1fr);gap:2px 12px;align-items:start;padding:9px 12px;border:1px solid var(--r-line);border-radius:4px;background:#fff;color:var(--r-ink) !important;text-decoration:none}
a.app-go:hover{border-color:var(--r-green);background:var(--r-pale)}
.app-tag{grid-row:span 2;align-self:center;text-align:center;font:700 .66rem/1 Consolas,ui-monospace,monospace;letter-spacing:.08em;padding:6px 0;border-radius:3px;background:var(--r-pale);color:var(--r-green-dd);border:1px solid var(--r-rule)}
.app-tag.t-mina{background:#0f1512;color:#9fdc7c;border-color:#0f1512}
.app-tag.t-tools{background:#FDF4EE;color:#B83C0C;border-color:#F0C3A9}
a.app-go b{font-size:.93rem;font-weight:700}
a.app-go small{font-size:.8rem;color:var(--r-soft);line-height:1.4}
.app-note{margin:10px 0 0;font-size:.78rem;color:var(--r-mute)}
table.app-tbl td,table.app-tbl th{vertical-align:top}
ol.app-steps{margin:6px 0 12px;padding-left:22px}
ol.app-steps li{margin-bottom:5px}
@media (max-width:600px){a.app-go{grid-template-columns:52px minmax(0,1fr)}}
@media print{a.app-go{border:0;padding:2px 0}}

/* ---------- empirical equations: chapter card, section notes (I.5) ---------- */
.eq-card > summary{color:var(--r-sand-d) !important}
.eq-intro{background:var(--r-sand);border:1px solid var(--r-sand-b);border-left:4px solid var(--r-sand-d);border-radius:8px;padding:12px 16px;margin:4px 0 14px;font-size:.94rem}
.eq-intro p{margin:0 0 8px}.eq-intro p:last-child,.eq-intro ol:last-child{margin-bottom:0}.eq-intro ol{margin:4px 0 0;padding-left:22px}
.eq-card h4{margin:18px 0 8px;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--r-mute)}
details.eq-item{border:1px solid var(--r-line);border-radius:8px;background:#fff;margin:0 0 8px}
details.eq-item > summary{list-style:none;cursor:pointer;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;padding:9px 14px}
details.eq-item > summary::-webkit-details-marker{display:none}
details.eq-item > summary::before{content:"\25B8";color:var(--r-mute);transition:transform .15s}
details.eq-item[open] > summary::before{transform:rotate(90deg)}
.eqi-id{font:700 .78rem ui-monospace,Consolas,monospace;color:var(--r-sand-d);min-width:46px}
.eqi-t{font-weight:600}
.eqi-p{font-size:.78rem;color:var(--r-soft);background:var(--r-pale);padding:1px 8px;border-radius:999px}
.eqi-b{padding:2px 16px 12px;border-top:1px solid var(--r-line);font-size:.93rem}
.eqi-f{background:#f4f6f2;border-radius:6px;padding:10px 14px;margin:10px 0;font:1.02rem/1.7 "Cambria Math",Cambria,"Times New Roman",serif;overflow-x:auto}
.eqi-b p{margin:6px 0}
.eqi-c{background:var(--r-sand);border-left:3px solid var(--r-sand-d);padding:6px 10px;border-radius:3px}
.eqi-s{color:var(--r-soft);font-size:.86rem}
.eq-note{margin:16px 0 4px;background:var(--r-sand);border:1px solid var(--r-sand-b);border-left:4px solid var(--r-sand-d);border-radius:8px;padding:10px 14px;font-size:.88rem}
.eq-note .eqn-tag,.eqn-inline{font:700 .7rem 'Segoe UI',Arial,sans-serif;letter-spacing:.1em;text-transform:uppercase;color:var(--r-sand-d)}
.eq-note p{margin:4px 0 6px;color:var(--r-soft)}
.eq-note ul{margin:0;padding-left:18px}.eq-note li{margin:4px 0}
.eq-note li a{color:var(--r-green-dd);text-decoration:none}.eq-note li a:hover{text-decoration:underline}
.eq-note .eqn-p{font-size:.78rem;color:var(--r-soft);margin-left:4px}
.eq-note .eqn-l{display:block;color:var(--r-soft);font-size:.84rem;margin-top:2px}
table.eq-map td{vertical-align:top;font-size:.86rem}
@media print{details.eq-item{break-inside:avoid}details.eq-item:not([open]) .eqi-b{display:block}}
details.eq-item > summary{justify-content:flex-start !important;text-align:left}
details.eq-item > summary .eqi-t{flex:1}
details.eq-item > summary{justify-content:flex-start !important;text-align:left}
details.eq-item > summary .eqi-t{flex:1}
table.eq-map td:first-child{white-space:nowrap}