/* Layout concept: a quiet case-file reader. Cool paper ground, ink-dark text, one deep
   teal accent borrowed from clinical charting; genogram glyphs (squares, circles,
   relationship lines) as the only ornament. Sidebar contents + a 70ch reading column. */
@font-face{font-family:"Newsreader";src:url("fonts/newsreader.woff2") format("woff2");font-weight:200 800;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader";src:url("fonts/newsreader-italic.woff2") format("woff2");font-weight:200 800;font-style:italic;font-display:swap}
@font-face{font-family:"Public Sans";src:url("fonts/publicsans.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Public Sans";src:url("fonts/publicsans-italic.woff2") format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("fonts/plexmono.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}

:root{
  --bg:#F3F5F2; --surface:#FFFFFF; --surface-2:#EBEFEB; --ink:#16201D; --ink-2:#34403C;
  --muted:#5C6964; --line:#D6DDD8; --line-2:#C3CCC6;
  --accent:#1D6656; --accent-ink:#FFFFFF; --accent-soft:#E0EEE9; --accent-line:#9CC5B9;
  --c-def:#1D6656; --c-def-bg:#EAF4F0;
  --c-imp:#384A94; --c-imp-bg:#ECEFF9;
  --c-rem:#8A5D0A; --c-rem-bg:#F7F0E1;
  --c-ex:#4D5866; --c-ex-bg:#EFF1F3;
  --c-exam:#9C3B26; --c-exam-bg:#F8ECE8;
  --c-conf:#664796; --c-conf-bg:#F1ECF7;
  --c-ctx:#5C6964; --c-ctx-bg:#F0F2F0;
  --ok:#1D7A4E; --focus:#2A62D8;
  --f-display:"Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --f-body:"Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --f-mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --r:6px; --top-h:56px; --shadow:0 1px 2px rgba(20,32,28,.06),0 4px 16px rgba(20,32,28,.06);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0F1413; --surface:#161D1B; --surface-2:#1D2523; --ink:#E3EAE6; --ink-2:#C2CCC8;
  --muted:#93A19C; --line:#28322F; --line-2:#36423E;
  --accent:#6CC0AA; --accent-ink:#0B1513; --accent-soft:#1A2E29; --accent-line:#2F5A4F;
  --c-def:#6CC0AA; --c-def-bg:#162724;
  --c-imp:#9AA9EC; --c-imp-bg:#1A1F33;
  --c-rem:#E0B25E; --c-rem-bg:#2A2216;
  --c-ex:#AEB8C4; --c-ex-bg:#1C2126;
  --c-exam:#EE9077; --c-exam-bg:#2C1A15;
  --c-conf:#C3A8EC; --c-conf-bg:#241C30;
  --c-ctx:#93A19C; --c-ctx-bg:#1B2220;
  --ok:#5FCF95; --focus:#7FA8FF; --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0F1413; --surface:#161D1B; --surface-2:#1D2523; --ink:#E3EAE6; --ink-2:#C2CCC8;
  --muted:#93A19C; --line:#28322F; --line-2:#36423E;
  --accent:#6CC0AA; --accent-ink:#0B1513; --accent-soft:#1A2E29; --accent-line:#2F5A4F;
  --c-def:#6CC0AA; --c-def-bg:#162724;
  --c-imp:#9AA9EC; --c-imp-bg:#1A1F33;
  --c-rem:#E0B25E; --c-rem-bg:#2A2216;
  --c-ex:#AEB8C4; --c-ex-bg:#1C2126;
  --c-exam:#EE9077; --c-exam-bg:#2C1A15;
  --c-conf:#C3A8EC; --c-conf-bg:#241C30;
  --c-ctx:#93A19C; --c-ctx-bg:#1B2220;
  --ok:#5FCF95; --focus:#7FA8FF; --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
  color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--top-h) + 20px)}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent);text-underline-offset:2px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:3px}
button{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:600;line-height:1.2;text-wrap:balance;color:var(--ink);letter-spacing:-.005em}
strong{font-weight:650;color:var(--ink)}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 12px;z-index:100;border:1px solid var(--line)}
.skip:focus{left:8px}
.small{font-size:.9em;color:var(--muted)}
.mono{font-family:var(--f-mono)}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;height:var(--top-h);display:flex;align-items:center;gap:12px;padding-inline:16px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.2) blur(10px);-webkit-backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--f-display);font-weight:600;font-size:1.06rem;white-space:nowrap;min-width:0}
.brand svg{flex:none}
.brand span{overflow:hidden;text-overflow:ellipsis}
.top-spacer{flex:1}
.searchbtn{display:flex;align-items:center;gap:10px;height:36px;padding:0 10px 0 12px;border:1px solid var(--line-2);background:var(--surface);border-radius:var(--r);color:var(--muted);cursor:pointer;min-width:0;width:min(320px,40vw)}
.searchbtn:hover{border-color:var(--accent-line)}
.searchbtn .lbl{flex:1;text-align:left;font-size:.92rem}
kbd{font-family:var(--f-mono);font-size:.72rem;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:4px;padding:1px 5px;color:var(--muted);background:var(--surface-2)}
.iconbtn{display:inline-grid;place-items:center;width:36px;height:36px;border:1px solid var(--line-2);background:var(--surface);border-radius:var(--r);cursor:pointer;color:var(--ink-2);flex:none}
.iconbtn:hover{border-color:var(--accent-line);color:var(--accent)}
.menubtn{display:none}
.readbar{position:absolute;left:0;bottom:-1px;height:2px;background:var(--accent);width:0;transition:width .1s linear}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:280px minmax(0,1fr);max-width:1320px;margin-inline:auto}
.shell.no-side{grid-template-columns:minmax(0,1fr)}
.sidebar{position:sticky;top:calc(var(--top-h) + env(safe-area-inset-top,0px));height:calc(100vh - var(--top-h));overflow-y:auto;padding:24px 16px 40px 20px;border-right:1px solid var(--line);font-size:.92rem;overscroll-behavior:contain}
.no-side .sidebar{display:none}
.main{min-width:0;padding:32px clamp(16px,4vw,56px) 96px}
.main:focus{outline:none}

.side-home{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--muted);font-size:.86rem;margin-bottom:18px}
.side-home:hover{color:var(--accent)}
.side-label{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.side-title{font-family:var(--f-display);font-size:1.15rem;font-weight:600;line-height:1.25;margin:0 0 4px}
.side-prog{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.8rem;margin:8px 0 14px}
.toc{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.toc li{border-bottom:1px solid var(--line)}
.toc a{display:flex;gap:10px;align-items:flex-start;padding:8px 4px 8px 2px;text-decoration:none;color:var(--ink-2);line-height:1.35}
.toc a:hover{color:var(--accent)}
.toc a.active{color:var(--ink);font-weight:600}
.toc a.active .tick{border-color:var(--accent)}
.tick{flex:none;width:14px;height:14px;margin-top:2px;border:1.5px solid var(--line-2);border-radius:3px;display:grid;place-items:center}
.tick.on{background:var(--accent);border-color:var(--accent)}
.tick.on::after{content:"";width:7px;height:4px;border:2px solid var(--accent-ink);border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.side-mods{margin-top:26px}
.side-mods a{display:flex;gap:8px;padding:5px 0;color:var(--muted);text-decoration:none;font-size:.86rem}
.side-mods a:hover,.side-mods a.cur{color:var(--accent)}
.side-mods .ch{font-family:var(--f-mono);font-size:.72rem;width:38px;flex:none;padding-top:2px}
.pn{display:flex;justify-content:space-between;gap:8px;margin-top:18px;font-size:.84rem}
.pn a{text-decoration:none}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--r);border:1px solid var(--line-2);background:var(--surface);color:var(--ink);text-decoration:none;cursor:pointer;font-size:.93rem;font-weight:550;white-space:nowrap}
.btn:hover{border-color:var(--accent-line);color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08);color:var(--accent-ink)}
.btn.sm{height:32px;padding:0 12px;font-size:.84rem}
.btn[aria-busy="true"]{opacity:.7;cursor:progress}
.btnrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* ---------- progress ---------- */
.bar{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;flex:1;min-width:60px}
.bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .3s}
.bar.thin{height:4px}

/* ---------- home ---------- */
.home{max-width:1120px;margin-inline:auto}
.hero{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start;padding-block:8px 32px;border-bottom:1px solid var(--line)}
.eyebrow{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.hero h1{font-size:clamp(2rem,4.2vw,3rem);margin:0 0 14px;font-weight:550;letter-spacing:-.015em}
.hero h1 em{font-style:italic;font-weight:450;color:var(--accent)}
.hero p.lede{font-size:1.08rem;color:var(--ink-2);max-width:60ch;margin:0 0 22px}
.statcard{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:18px 18px 16px;box-shadow:var(--shadow)}
.statcard h2{font-size:1rem;margin:0 0 12px;font-family:var(--f-body);font-weight:650}
.bigpct{font-family:var(--f-display);font-size:2.6rem;line-height:1;font-weight:500;font-variant-numeric:tabular-nums}
.bigpct small{font-size:1rem;color:var(--muted);margin-left:2px}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px;font-size:.84rem;color:var(--muted)}
.stats b{display:block;font-size:1.05rem;color:var(--ink);font-variant-numeric:tabular-nums;font-weight:650}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:40px 0 16px;flex-wrap:wrap}
.sec-h h2{font-size:1.5rem;margin:0}
.sec-h p{margin:0;color:var(--muted);font-size:.92rem}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:18px 18px 16px;min-width:0;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--accent-line)}
.card .ch{display:flex;align-items:center;justify-content:space-between;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.card h3{font-size:1.28rem;margin:0 0 8px}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--accent)}
.card p{margin:0 0 14px;color:var(--ink-2);font-size:.92rem;line-height:1.55;flex:1}
.card .meta{display:flex;align-items:center;gap:10px;font-size:.8rem;color:var(--muted);margin-bottom:14px;font-variant-numeric:tabular-nums}
.card .done{color:var(--ok);font-weight:600}
.quick{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.quick a{display:flex;flex-direction:column;gap:2px;padding:14px 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);text-decoration:none;color:var(--ink);min-width:0}
.quick a:hover{border-color:var(--accent-line)}
.quick a b{font-weight:650;font-size:.95rem}
.quick a span{font-size:.82rem;color:var(--muted);line-height:1.4}
.glyph{width:22px;height:22px;color:var(--accent);margin-bottom:6px}
.homefoot{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.86rem;display:flex;flex-wrap:wrap;gap:8px 20px}

/* ---------- article ---------- */
.article{max-width:760px}
.mod-head{padding-bottom:24px;margin-bottom:8px;border-bottom:1px solid var(--line)}
.mod-head .eyebrow{display:flex;gap:10px;flex-wrap:wrap}
.mod-head h1{font-size:clamp(1.9rem,3.6vw,2.6rem);margin:0 0 12px;font-weight:550}
.mod-head .lede{font-size:1.08rem;color:var(--ink-2);margin:0 0 18px}
.learn{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0 20px;align-items:start}
.learn div{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 16px}
.learn h2{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:2px 0 6px;font-weight:500}
.learn ul{margin:0;padding-left:18px;font-size:.9rem}
.learn li{margin:2px 0}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:.78rem;padding:2px 9px;border-radius:99px;background:var(--accent-soft);color:var(--ink-2);border:1px solid var(--accent-line)}
.mod-tools{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.sec{padding-top:28px;margin-top:8px}
.sec>h2{font-size:1.62rem;margin:0 0 14px;display:flex;align-items:flex-start;gap:10px}
.sec>h2 .num{font-family:var(--f-mono);font-size:.78rem;color:var(--muted);font-weight:500;padding-top:.55em;flex:none;min-width:1.8em}
.sec>h2 .htxt{flex:1}
.sec>h2 .collapse{flex:none;margin-top:4px;width:28px;height:28px;border:1px solid transparent;border-radius:5px;background:none;cursor:pointer;color:var(--muted);display:grid;place-items:center}
.sec>h2 .collapse:hover{border-color:var(--line-2);color:var(--accent)}
.sec.collapsed>h2 .collapse svg{transform:rotate(-90deg)}
.sec.collapsed>.sec-body{display:none}
.sec h3{font-size:1.22rem;margin:28px 0 8px}
.sec h4{font-family:var(--f-body);font-size:.95rem;font-weight:700;margin:0 0 6px}
.sec p,.sec li{max-width:70ch}
.sec ul,.sec ol{padding-left:1.3em}
.sec li{margin:4px 0}
.sec-foot{display:flex;justify-content:flex-end;margin-top:18px;padding-top:10px;border-top:1px dashed var(--line)}
.revbtn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);background:var(--surface);border-radius:99px;height:32px;padding:0 14px 0 10px;cursor:pointer;font-size:.84rem;color:var(--ink-2)}
.revbtn:hover{border-color:var(--accent-line)}
.revbtn[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent-line);color:var(--ink)}
.caption{font-size:.86rem;color:var(--muted);margin-top:-4px}

/* callouts */
.co{margin:20px 0;padding:14px 18px 14px 16px;border-radius:8px;background:var(--co-bg);border:1px solid color-mix(in srgb,var(--co) 22%,transparent);border-left:3px solid var(--co)}
.co>*:last-child,.co-body>*:last-child{margin-bottom:0}
.co p{margin:0 0 8px}
.co ul{margin:6px 0}
.co-label{display:flex;align-items:center;gap:8px;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--co);margin:0 0 6px;font-weight:500}
.co-term{font-family:var(--f-display);font-weight:600;font-size:1.12rem;margin:0 0 4px;color:var(--ink)}
.co-def{--co:var(--c-def);--co-bg:var(--c-def-bg)}
.co-imp{--co:var(--c-imp);--co-bg:var(--c-imp-bg)}
.co-rem{--co:var(--c-rem);--co-bg:var(--c-rem-bg)}
.co-ex{--co:var(--c-ex);--co-bg:var(--c-ex-bg)}
.co-exam{--co:var(--c-exam);--co-bg:var(--c-exam-bg)}
.co-conf{--co:var(--c-conf);--co-bg:var(--c-conf-bg)}
.co-ctx{--co:var(--c-ctx);--co-bg:var(--c-ctx-bg);border-style:dashed;border-left-style:solid}
.co-t{font-weight:650;color:var(--ink);margin:0 0 6px}

/* case studies */
details.case{margin:20px 0;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
details.case>summary{list-style:none;cursor:pointer;padding:12px 16px 12px 40px;position:relative;display:flex;flex-direction:column;gap:2px}
details.case>summary::-webkit-details-marker{display:none}
details.case>summary::before{content:"";position:absolute;left:16px;top:18px;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);transition:transform .15s}
details.case[open]>summary::before{transform:rotate(45deg);top:15px}
details.case>summary:hover .case-t{color:var(--accent)}
.case-l{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.case-t{font-family:var(--f-display);font-weight:600;font-size:1.08rem}
.case-k{font-size:.88rem;color:var(--ink-2)}
.case-body{padding:2px 18px 14px 40px;border-top:1px solid var(--line)}
.case-body p{margin:10px 0}

/* tables */
.table-wrap{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.9rem;line-height:1.5}
caption{caption-side:top;text-align:left;font-weight:650;padding:10px 14px 8px;font-size:.9rem;color:var(--ink);border-bottom:1px solid var(--line)}
th,td{text-align:left;vertical-align:top;padding:9px 14px;border-bottom:1px solid var(--line)}
tbody tr:last-child>*{border-bottom:0}
thead th{font-family:var(--f-body);font-size:.78rem;letter-spacing:.03em;text-transform:uppercase;color:var(--muted);font-weight:650;background:var(--surface-2);white-space:nowrap}
tbody th{font-weight:650;color:var(--ink);width:1%;white-space:nowrap;background:color-mix(in srgb,var(--surface-2) 45%,transparent)}
table.dense td,table.dense th{padding:8px 12px}
td:first-child strong{white-space:normal}
@media (max-width:640px){tbody th{white-space:normal}}

/* duo */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0}
.duo>div{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;min-width:0}
.duo p{margin:0 0 6px}
.duo ul{margin:4px 0;padding-left:1.1em;font-size:.93rem}

/* flows */
.flow{margin:22px 0;padding:0}
.flow>figcaption,.cycle>figcaption,.timeline-t,.tabs-t{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.flow-steps{list-style:none;margin:0;padding:0;counter-reset:fs}
.flow-v .flow-steps li{position:relative;padding:10px 14px 10px 46px;margin:0 0 16px;background:var(--surface);border:1px solid var(--line);border-radius:8px;max-width:none}
.flow-v .flow-steps li::before{content:"";position:absolute;left:14px;top:13px;width:18px;height:18px;border-radius:50%;border:2px solid var(--accent);background:var(--surface)}
.flow-v.numbered .flow-steps li::before{counter-increment:fs;content:counter(fs);display:grid;place-items:center;font-family:var(--f-mono);font-size:.7rem;color:var(--accent);width:22px;height:22px;left:12px;top:11px}
.flow-v .flow-steps li:not(:last-child)::after{content:"";position:absolute;left:22px;bottom:-17px;height:16px;border-left:2px solid var(--accent-line)}
.flow-v .flow-steps li:last-child{margin-bottom:0}
.flow-steps b{display:block;font-weight:650;margin-bottom:2px}
.flow-steps p{margin:4px 0 0}
.flow-h .flow-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:22px}
.flow-h .flow-steps li{position:relative;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:8px;padding:10px 12px;font-size:.9rem;line-height:1.45;margin:0}
.flow-h .flow-steps li:not(:last-child)::after{content:"";position:absolute;right:-17px;top:50%;width:10px;height:10px;border-top:2px solid var(--accent);border-right:2px solid var(--accent);transform:translateY(-50%) rotate(45deg)}
.flow-h.numbered .flow-steps li::before{counter-increment:fs;content:counter(fs);font-family:var(--f-mono);font-size:.7rem;color:var(--accent);display:block;margin-bottom:2px}
@media (max-width:640px){.flow-h .flow-steps{grid-template-columns:1fr;gap:18px}.flow-h .flow-steps li:not(:last-child)::after{right:auto;left:50%;top:auto;bottom:-15px;transform:translateX(-50%) rotate(135deg)}}

/* cycle */
.cycle{margin:22px 0}
.cycle ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:22px;position:relative}
.cycle li{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:.9rem;line-height:1.4;margin:0}
.cycle li:not(:last-child)::after{content:"";position:absolute;right:-17px;top:50%;width:10px;height:10px;border-top:2px solid var(--accent);border-right:2px solid var(--accent);transform:translateY(-50%) rotate(45deg)}
.cycle-back{position:relative;height:30px;margin:4px 8% 0;border:2px solid var(--accent-line);border-top:0;border-radius:0 0 12px 12px}
.cycle-back::before{content:"";position:absolute;left:-7px;top:-6px;width:10px;height:10px;border-top:2px solid var(--accent-line);border-left:2px solid var(--accent-line);transform:rotate(45deg)}
.cycle-back span{position:absolute;left:50%;bottom:-11px;transform:translateX(-50%);background:var(--bg);padding:0 8px;font-family:var(--f-mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
@media (max-width:640px){.cycle ol{grid-template-columns:1fr;gap:16px}.cycle li:not(:last-child)::after{right:auto;left:50%;top:auto;bottom:-14px;transform:translateX(-50%) rotate(135deg)}.cycle-back{margin-inline:30%}}

/* timeline */
.timeline{list-style:none;margin:16px 0;padding:0;border-left:2px solid var(--accent-line)}
.timeline li{position:relative;padding:0 0 14px 22px;max-width:none}
.timeline li::before{content:"";position:absolute;left:-7px;top:7px;width:12px;height:12px;border-radius:2px;background:var(--surface);border:2px solid var(--accent)}
.tl-y{display:block;font-family:var(--f-mono);font-size:.8rem;color:var(--accent);font-weight:500}
.timeline li div{font-size:.93rem}

/* tabs */
.tabs{margin:22px 0;border:1px solid var(--line);border-radius:8px;background:var(--surface);overflow:hidden}
.tabs-t{padding:12px 16px 0}
.tablist{display:flex;gap:4px;padding:8px 10px 0;border-bottom:1px solid var(--line);overflow-x:auto}
.tablist button{border:1px solid transparent;border-bottom:0;background:none;padding:8px 14px;border-radius:6px 6px 0 0;cursor:pointer;color:var(--muted);font-weight:600;font-size:.9rem;white-space:nowrap;margin-bottom:-1px}
.tablist button[aria-selected="true"]{background:var(--surface);border-color:var(--line);color:var(--accent);border-bottom:1px solid var(--surface)}
.tabpanel{padding:14px 18px;font-size:.95rem}
.tabpanel h4{display:none}

/* diagrams */
figure.diagram{margin:22px 0;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px}
figure.diagram svg{display:block;width:100%;max-width:560px;height:auto;margin-inline:auto}
figure.diagram figcaption{font-size:.86rem;color:var(--muted);margin-top:10px}
.d-node rect,.d-node circle{fill:var(--surface);stroke:var(--ink);stroke-width:2}
.d-node text,.d-label{font-family:var(--f-body);fill:var(--ink);font-size:13px;text-anchor:middle;font-weight:600}
.d-label{font-weight:500;fill:var(--muted);font-size:12px}
.d-label.start{text-anchor:start}
.d-plain{stroke:var(--ink-2);stroke-width:2;fill:none}
.d-faint{stroke:var(--c-exam)}
.d-dist{stroke:var(--muted);stroke-width:2;stroke-dasharray:3 5;fill:none}
.d-close{stroke:var(--accent);stroke-width:2}
.d-arrow{fill:var(--ink-2)}
.d-coal{fill:none;stroke:var(--accent);stroke-width:2;stroke-dasharray:6 4}
.map-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.map-grid figure.diagram{margin:10px 0}
.boundary-scale{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:center;font-size:.9rem}
.boundary-scale b{display:block;margin-top:8px}
.boundary-scale em{font-style:normal;color:var(--muted);font-size:.85rem}
.bl{display:block;height:0;border-top:3px solid var(--ink);margin:10px 8px 0}
.bl-clear{border-top-style:dashed}
.bl-diffuse{border-top-style:dotted}
.concept-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:18px 0}
.concept-grid a{display:flex;flex-direction:column;gap:6px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);text-decoration:none;color:var(--ink);font-size:.88rem;line-height:1.35;font-weight:600;min-width:0}
.concept-grid a:hover{border-color:var(--accent-line)}
.concept-grid b{font-family:var(--f-mono);color:var(--accent);font-weight:500;font-size:.8rem}

/* takeaways */
.takeaways{margin-top:40px;padding:22px 24px;border-radius:10px;background:var(--surface);border:1px solid var(--line)}
.takeaways>h2{margin-top:0}
.takeaways ul{padding-left:1.2em}

/* module footer nav */
.modnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:40px}
.modnav a{display:flex;flex-direction:column;padding:14px 16px;border:1px solid var(--line);border-radius:8px;background:var(--surface);text-decoration:none;color:var(--ink);min-width:0}
.modnav a:hover{border-color:var(--accent-line)}
.modnav span{font-size:.78rem;color:var(--muted);font-family:var(--f-mono);text-transform:uppercase;letter-spacing:.06em}
.modnav b{font-family:var(--f-display);font-weight:600;font-size:1.05rem}
.modnav .next{text-align:right}

/* revision */
.ess-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.ess{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;min-width:0}
.ess h3{margin:0 0 6px;font-size:1.08rem}
.ess h3 a{color:var(--ink);text-decoration:none}
.ess ul{margin:0;padding-left:1.1em;font-size:.92rem}
.proc-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.proc{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 14px;min-width:0}
.proc h3{font-size:1rem;margin:0 0 6px}
.proc ol{margin:0;padding-left:1.3em;font-size:.88rem}
.proc li{margin:1px 0}
.keydefs{margin:0;display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
.keydefs div{display:grid;grid-template-columns:220px 1fr;gap:16px;padding:10px 0;border-bottom:1px solid var(--line)}
.keydefs dt{font-family:var(--f-display);font-weight:600;font-size:1.04rem}
.keydefs dd{margin:0;font-size:.93rem}
.triggers{list-style:none;padding:0!important;columns:2;column-gap:28px}
.triggers li{break-inside:avoid;padding:6px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.triggers b{color:var(--accent);font-weight:650}

/* glossary page */
.gl-tools{position:sticky;top:calc(var(--top-h) + env(safe-area-inset-top,0px));z-index:5;background:var(--bg);padding:12px 0;display:flex;flex-direction:column;gap:10px;border-bottom:1px solid var(--line)}
.field{display:flex;align-items:center;gap:8px;height:42px;border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);padding:0 12px}
.field:focus-within{border-color:var(--accent)}
.field input{flex:1;border:0;outline:0;background:transparent;color:var(--ink);font:inherit;min-width:0}
.letters{display:flex;flex-wrap:wrap;gap:2px}
.letters a{font-family:var(--f-mono);font-size:.78rem;padding:2px 6px;border-radius:4px;text-decoration:none}
.letters a.off{color:var(--line-2);pointer-events:none}
.gl-group h2{font-size:1.4rem;margin:26px 0 6px;color:var(--accent)}
.gl-item{padding:12px 0;border-bottom:1px solid var(--line)}
.gl-item dt{font-family:var(--f-display);font-weight:600;font-size:1.1rem}
.gl-item dd{margin:2px 0 0}
.gl-item .see{font-size:.84rem}
.gl-empty{padding:20px 0;color:var(--muted)}

/* search overlay */
.sx{position:fixed;inset:0;z-index:80;background:rgba(10,16,14,.42);display:flex;justify-content:center;align-items:flex-start;padding:max(8vh,calc(env(safe-area-inset-top,0px) + 12px)) 16px 16px}
.sx[hidden]{display:none!important}
.sx-panel{width:min(720px,100%);max-height:80vh;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line-2);border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden}
.sx-in{display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid var(--line);height:56px}
.sx-in input{flex:1;border:0;outline:0;background:transparent;color:var(--ink);font:inherit;font-size:1.05rem;min-width:0}
.sx-res{overflow-y:auto;padding:6px}
.sx-res a{display:block;padding:10px 12px;border-radius:8px;text-decoration:none;color:var(--ink)}
.sx-res a[aria-selected="true"],.sx-res a:hover{background:var(--accent-soft)}
.sx-crumb{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.sx-title{font-weight:650;display:block}
.sx-snip{font-size:.86rem;color:var(--ink-2);display:block;line-height:1.45}
mark{background:color-mix(in srgb,var(--c-rem) 28%,transparent);color:inherit;border-radius:2px;padding:0 1px}
.sx-foot{display:flex;gap:14px;padding:8px 14px;border-top:1px solid var(--line);font-size:.76rem;color:var(--muted);flex-wrap:wrap}
.sx-empty{padding:18px 14px;color:var(--muted);font-size:.92rem}
.sx-sugg{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.sx-sugg button{border:1px solid var(--line-2);background:var(--surface-2);border-radius:99px;padding:3px 10px;cursor:pointer;font-size:.82rem}

/* misc */
.totop{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:30;opacity:0;pointer-events:none;transition:opacity .2s}
.totop.show{opacity:1;pointer-events:auto}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:90;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:8px;font-size:.9rem;box-shadow:var(--shadow);max-width:calc(100vw - 32px)}
.toast[hidden]{display:none!important}
.scrim{display:none}
.notes ol li{margin-bottom:10px}
.print-only{display:none}

/* ---------- responsive ---------- */
@media (max-width:1060px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.quick{grid-template-columns:repeat(3,minmax(0,1fr))}.proc-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.concept-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .menubtn{display:inline-grid}
  .sidebar{position:fixed;left:0;top:calc(var(--top-h) + env(safe-area-inset-top,0px));bottom:0;height:auto;width:min(320px,86vw);z-index:35;background:var(--bg);transform:translateX(-102%);transition:transform .2s;box-shadow:var(--shadow)}
  .no-side .sidebar{display:block}
  body.nav-open .sidebar{transform:none}
  body.nav-open .scrim{display:block;position:fixed;inset:0;z-index:34;background:rgba(0,0,0,.3)}
  .hero{grid-template-columns:1fr;gap:24px}
  .searchbtn{width:auto}
  .searchbtn .lbl,.searchbtn kbd{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .cards,.quick,.ess-grid,.proc-grid,.duo,.learn,.map-grid,.modnav{grid-template-columns:minmax(0,1fr)}
  .concept-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .keydefs div{grid-template-columns:1fr;gap:2px}
  .triggers{columns:1}
  .main{padding-top:22px}
  .brand span{display:none}
  .sec>h2{font-size:1.4rem}
  .boundary-scale{font-size:.8rem}
}

/* ---------- print (browser print + generated PDFs) ---------- */
@page{size:A4;margin:20mm 18mm 20mm 18mm}
@media print{
  :root{--bg:#fff;--surface:#fff;--surface-2:#F1F3F1;--ink:#111;--ink-2:#2A2F2D;--muted:#555E5A;--line:#CFD6D2;--line-2:#BCC5C0;--accent:#1D6656;--accent-soft:#EAF4F0;--accent-line:#9CC5B9;
    --c-def:#1D6656;--c-def-bg:#F2F8F5;--c-imp:#384A94;--c-imp-bg:#F2F4FB;--c-rem:#8A5D0A;--c-rem-bg:#FBF6EC;--c-ex:#4D5866;--c-ex-bg:#F4F5F7;--c-exam:#9C3B26;--c-exam-bg:#FBF1EE;--c-conf:#664796;--c-conf-bg:#F6F2FA;--c-ctx:#5C6964;--c-ctx-bg:#F5F6F5;color-scheme:light}
  html{scroll-behavior:auto}
  body{font-size:10.4pt;line-height:1.5;background:#fff;color:#111;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .topbar,.sidebar,.totop,.toast,.sx,.scrim,.mod-tools,.sec-foot,.modnav,.collapse,.no-print,.btn,.revbtn,.tablist,.side-prog,.homefoot,.gl-tools,.skip{display:none!important}
  .print-only{display:block}
  .shell{display:block;max-width:none}
  .main{padding:0}
  .article{max-width:none}
  a{color:inherit;text-decoration:none}
  h1,h2,h3,h4{break-after:avoid-page;page-break-after:avoid}
  h2,h3{break-inside:avoid}
  p,li{orphans:3;widows:3}
  .sec{padding-top:10pt;margin-top:4pt}
  .sec.collapsed>.sec-body{display:block}
  .sec>h2{font-size:16pt;margin-bottom:8pt}
  .sec h3{font-size:12.5pt;margin:14pt 0 5pt}
  .sec p,.sec li{max-width:none}
  .co,details.case,.duo>div,figure.diagram,.flow-steps li,.cycle li,.proc,.ess,.timeline li,.keydefs div,.gl-item,tr,.tabpanel{break-inside:avoid;page-break-inside:avoid}
  .co{padding:8pt 11pt;margin:10pt 0}
  .table-wrap{overflow:visible;border:1px solid var(--line);margin:10pt 0}
  table{font-size:8.9pt}
  thead{display:table-header-group}
  th,td{padding:5pt 8pt}
  details.case{background:#fff}
  details.case>summary{padding:8pt 11pt}
  details.case>summary::before{display:none}
  .case-body{display:block!important;padding:2pt 11pt 8pt}
  .tabs{border:1px solid var(--line)}
  .tabpanel{display:block!important;border-top:1px solid var(--line);padding:8pt 11pt}
  .tabpanel[hidden]{display:block!important}
  .tabpanel h4{display:block;margin:0 0 3pt;font-size:10pt;color:var(--accent)}
  .flow-v .flow-steps li{padding:6pt 10pt 6pt 34pt;margin-bottom:9pt}
  .flow-v .flow-steps li::before{left:9pt;top:7pt}
  .flow-v .flow-steps li:not(:last-child)::after{bottom:-10pt;height:9pt;left:16pt}
  .flow-h .flow-steps{gap:14pt}
  .cycle ol{gap:14pt}
  figure.diagram{padding:8pt 10pt}
  figure.diagram svg{max-width:120mm}
  .map-grid figure.diagram svg{max-width:62mm}
  .takeaways{break-inside:avoid;margin-top:16pt;padding:10pt 14pt;background:var(--accent-soft)}
  .mod-head{border-bottom:2px solid var(--accent);margin-bottom:6pt}
  .learn{grid-template-columns:1fr 1fr;gap:10pt}
  .learn div{padding:8pt 10pt}
  .duo{gap:10pt}
  .concept-grid a{padding:6pt;font-size:9pt}
  .triggers{columns:2}
  .cards,.quick{display:none}
  .pagebreak{break-before:page;page-break-before:always}
  .avoid-break{break-inside:avoid}
}

/* print document wrappers (generated PDFs only) */
.pdoc .cover{height:240mm;display:flex;flex-direction:column;justify-content:space-between;padding:10mm 4mm}
.pdoc .cover h1{font-size:38pt;line-height:1.05;margin:0 0 10pt;font-weight:500;letter-spacing:-.01em}
.pdoc .cover h1 em{color:var(--accent);font-style:italic;font-weight:400}
.pdoc .cover .eyebrow{font-size:9pt}
.pdoc .cover .lede{font-size:12pt;color:var(--ink-2);max-width:120mm}
.pdoc .cover .meta{font-size:9pt;color:var(--muted);border-top:1px solid var(--line);padding-top:8pt;display:flex;justify-content:space-between;gap:12pt}
.pdoc .ptoc h2{font-size:20pt;margin:0 0 14pt}
.pdoc .ptoc ol{list-style:none;padding:0;margin:0}
.pdoc .ptoc li{display:flex;align-items:baseline;gap:8pt;padding:5pt 0;border-bottom:1px solid var(--line);font-size:10.5pt}
.pdoc .ptoc li .k{font-family:var(--f-mono);font-size:8pt;color:var(--muted);width:44pt;flex:none}
.pdoc .ptoc li .t{flex:1;font-weight:600}
.pdoc .ptoc li .p{font-family:var(--f-mono);font-size:9pt;color:var(--muted);font-variant-numeric:tabular-nums}
.pdoc .ptoc li.sub{padding:2.5pt 0 2.5pt 52pt;border-bottom:0;font-size:9pt;color:var(--ink-2)}
.pdoc .ptoc li.sub .t{font-weight:400}
.pdoc .part-title{font-size:24pt;margin:0 0 6pt}
.pdoc .gl-cols{columns:2;column-gap:12mm}
.pdoc .gl-cols .gl-item{break-inside:avoid;padding:5pt 0}
.pdoc .gl-cols .gl-item dt{font-size:10.5pt}
.pdoc .gl-cols .gl-item dd{font-size:9pt}
.pdoc .gl-cols h2{font-size:13pt;margin:10pt 0 2pt;break-after:avoid;color:var(--accent)}