/* =====================================================================
   Pipe Ref · design system
   One family (Geist) for interface and figures, tabular numerals for data.
   Quiet white / grey surfaces, one deep engineering blue, blueprint navy
   reserved for drawings and 3D models.
   ===================================================================== */
@font-face{font-family:"Geist";src:url(fonts/Geist-Variable.woff2) format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Geist Mono";src:url(fonts/GeistMono-Variable.woff2) format("woff2");font-weight:100 900;font-display:swap}

:root{
  --paper:#F5F7FA; --paper-2:#EEF2F7; --sheet:#FFFFFF; --ink:#0F1B2D; --ink-2:#2A3A52; --muted:#5B6B80;
  --rule:#E3E8EF; --rule-strong:#CBD3DE;
  --accent:#1849A9; --accent-hover:#123B8C; --accent-soft:#EAF0FB; --accent-line:#BBCDF0; --on-accent:#FFFFFF;
  --hi:#FFF3D6; --hi-ink:#7A4B00; --ok:#147A4A; --ok-soft:#E3F4EA; --bad:#B42318; --bad-soft:#FDECEA;
  --steel:#4F6E8C; --glow:0 0 0 3px rgba(24,73,169,.18);
  --bp:#0E2440; --bp-2:#132E50; --bp-line:rgba(140,200,255,.10); --bp-ink:#E4EDF8; --bp-muted:#93A8C4; --bp-accent:#8CC8FF;
  --f-body:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-display:var(--f-body);
  --f-mono:"Geist Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-sm:6px; --r:8px; --r-lg:12px; --radius:8px;
  --sh-1:0 1px 2px rgba(15,27,45,.05);
  --sh-2:0 1px 2px rgba(15,27,45,.04),0 4px 12px -4px rgba(15,27,45,.08);
  --sh-pop:0 0 0 1px rgba(15,27,45,.06),0 16px 40px -12px rgba(15,27,45,.28);
  --side:252px; --top:56px;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --paper:#0A111E; --paper-2:#0F1828; --sheet:#101A2B; --ink:#E3E9F2; --ink-2:#C3CEDD; --muted:#8E9DB2;
  --rule:#1D2A3E; --rule-strong:#2C3B54;
  --accent:#7AA7FF; --accent-hover:#9DBEFF; --accent-soft:#15254A; --accent-line:#2A4782; --on-accent:#0A1430;
  --hi:#3A2D12; --hi-ink:#F4C766; --ok:#58CF8E; --ok-soft:#10301F; --bad:#F2877C; --bad-soft:#3A1916;
  --steel:#8FB0CF; --glow:0 0 0 3px rgba(122,167,255,.25);
  --bp:#0C1A2E; --bp-2:#10223B;
  --sh-1:none; --sh-2:0 0 0 1px rgba(0,0,0,.2); --sh-pop:0 0 0 1px #2C3B54,0 18px 44px -12px rgba(0,0,0,.6);
  color-scheme:dark;
}

/* ---------- base ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--top) + 12px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:14px;line-height:1.5;
  font-feature-settings:"tnum" 1,"cv11" 1;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3{font-family:var(--f-display);font-weight:600;letter-spacing:-.011em;text-wrap:balance;margin:0;color:var(--ink)}
h2{font-size:24px;line-height:1.25}
h3{font-size:15px;line-height:1.35}
p{text-wrap:pretty}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--accent-hover)}
button,select,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent-soft);color:var(--ink)}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--accent);color:var(--on-accent);padding:8px 14px;border-radius:var(--r-sm);text-decoration:none;font-weight:500}
.skip:focus{top:12px}
kbd{font:500 11px/1 var(--f-body);color:var(--muted);border:1px solid var(--rule-strong);border-bottom-width:2px;border-radius:4px;padding:3px 5px;background:var(--sheet)}
.mono,.val{font-family:var(--f-body);font-variant-numeric:tabular-nums}
td{font-variant-numeric:tabular-nums}

/* ---------- app shell ---------- */
.app{display:grid;grid-template-columns:var(--side) minmax(0,1fr);min-height:100vh}
.side{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;background:var(--sheet);border-right:1px solid var(--rule);z-index:30}
.brand{display:flex;align-items:center;gap:10px;padding:14px 16px;height:var(--top);text-decoration:none;color:var(--ink);border-bottom:1px solid var(--rule);flex:none}
.brand svg{width:28px;height:28px;flex:none}
.brand svg rect{fill:var(--accent);stroke:none}
.brand svg circle,.brand svg path{fill:none;stroke:var(--on-accent);stroke-width:1.8}
.brand b{display:block;font-size:15px;font-weight:650;letter-spacing:-.01em;line-height:1.15}
.brand small{display:block;font-size:11.5px;color:var(--muted);line-height:1.2}
.brand:hover{color:var(--ink)}

nav.tabs{flex:1;overflow-y:auto;padding:6px 10px 12px;scrollbar-width:thin;scrollbar-color:var(--rule-strong) transparent}
.navgrp{padding-top:10px}
.navh{margin:0;padding:4px 10px 4px;font-size:12px;font-weight:500;color:var(--muted)}
.navbtn{display:flex;align-items:center;gap:10px;min-height:32px;padding:6px 10px;border-radius:var(--r-sm);color:var(--ink-2);text-decoration:none;font-size:13.5px;font-weight:450;line-height:1.25}
.navbtn svg{width:18px;height:18px;flex:none;fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.navbtn:hover{background:var(--paper);color:var(--ink)}
.navbtn[aria-current="page"]{background:var(--accent-soft);color:var(--accent);font-weight:550}
.navbtn[aria-current="page"] svg{stroke:var(--accent)}
.side-foot{flex:none;border-top:1px solid var(--rule);padding:8px 10px}

.main{min-width:0;display:flex;flex-direction:column}
.top{position:sticky;top:0;z-index:20;height:var(--top);display:flex;align-items:center;gap:12px;padding:0 28px;
  background:color-mix(in srgb,var(--paper) 86%,transparent);-webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule)}
.top-brand{display:none;font-weight:650;color:var(--ink);text-decoration:none;font-size:15px}
.searchbtn{flex:1 1 auto;max-width:420px;min-width:0;height:36px;display:flex;align-items:center;gap:8px;padding:0 8px 0 10px;border:1px solid var(--rule-strong);border-radius:var(--r);background:var(--sheet);color:var(--muted);box-shadow:var(--sh-1);text-align:left;font-size:13.5px}
.searchbtn svg,.cmdk-in svg,.hero-search svg{width:17px;height:17px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.searchbtn .sb-t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.searchbtn:hover{border-color:var(--muted);color:var(--ink-2)}
.top-ctrls{margin-left:auto;display:flex;align-items:center;gap:14px;flex:none}
.tc{display:flex;align-items:center;gap:8px;margin:0}
.tc-l{font-size:12.5px;color:var(--muted)}
.icobtn{width:36px;height:36px;display:inline-grid;place-items:center;border:1px solid var(--rule-strong);border-radius:var(--r);background:var(--sheet);color:var(--ink-2);padding:0;flex:none}
.icobtn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.icobtn:hover{border-color:var(--muted);color:var(--ink)}
.menu{display:none}

.content{padding:20px 32px 48px;width:100%;max-width:1400px;outline:none}
.pagebar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;margin:0 0 14px;font-size:13px;color:var(--muted)}
.crumbs{display:flex;align-items:center;gap:6px;margin:0;padding:0;list-style:none}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--rule-strong)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent)}
.crumbs [aria-current]{color:var(--ink-2);font-weight:500}
.stds{display:flex;gap:6px;flex-wrap:wrap}
.std-chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;color:var(--ink-2);background:var(--sheet);border:1px solid var(--rule);border-radius:999px;padding:2px 10px}
.std-chip i{width:6px;height:6px;border-radius:50%;background:var(--accent);font-style:normal}

/* ---------- page head and controls ---------- */
.panel{padding:0}
.panel[hidden]{display:none}
.phead{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:flex-end;justify-content:space-between;margin-bottom:16px}
.phead p{margin:6px 0 0;color:var(--muted);max-width:72ch;font-size:14px}
.ctrls{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}
.ctrl .lbl,.lbl{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:450}
.seg{display:inline-flex;border:1px solid var(--rule-strong);border-radius:var(--r);overflow:hidden;background:var(--sheet);padding:2px;gap:2px}
.seg button{background:transparent;border:0;border-radius:5px;padding:4px 11px;min-height:28px;font-size:13px;font-weight:500;color:var(--muted);white-space:nowrap}
.seg button:hover{color:var(--ink);background:var(--paper)}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
select.sel,input.inp{background:var(--sheet);border:1px solid var(--rule-strong);border-radius:var(--r-sm);padding:6px 10px;min-height:34px;font-size:13.5px;min-width:0;font-variant-numeric:tabular-nums;color:var(--ink);transition:border-color .12s,box-shadow .12s}
select.sel{padding-right:28px;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' fill='none' stroke='%235B6B80' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;background-size:12px}
select.sel:hover,input.inp:hover{border-color:var(--muted)}
select.sel:focus,input.inp:focus{outline:0;border-color:var(--accent);box-shadow:var(--glow)}
input.inp{width:100%}
.inp:disabled{opacity:.45}
.top .sel{min-height:32px;padding-block:4px}
.top .seg button{min-height:26px}

/* ---------- data tables ---------- */
.tw{overflow-x:auto;border:1px solid var(--rule);border-radius:var(--r);background:var(--sheet);box-shadow:var(--sh-1);scrollbar-width:thin}
table{border-collapse:separate;border-spacing:0;width:100%;font-size:13px}
th,td{padding:7px 12px;border-bottom:1px solid var(--rule);text-align:right;white-space:nowrap}
th{font-weight:550;font-size:12px;background:var(--paper-2);color:var(--ink-2);vertical-align:bottom;line-height:1.3;border-bottom-color:var(--rule-strong)}
:root[data-theme="dark"] th{background:#0D1626}
th small{display:block;font-weight:400;color:var(--muted);font-size:11.5px}
thead tr:first-child th:first-child{border-top-left-radius:var(--r)}
th:first-child,td:first-child{position:sticky;left:0;text-align:left;border-right:1px solid var(--rule);z-index:1}
th:first-child{background:var(--paper-2)}
:root[data-theme="dark"] th:first-child{background:#0D1626}
td:first-child{background:var(--sheet);font-weight:550;color:var(--ink)}
td{color:var(--ink-2)}
tbody tr:last-child td{border-bottom:0}
tbody tr{cursor:pointer}
tbody tr:hover td{background:color-mix(in srgb,var(--accent-soft) 55%,var(--sheet))}
tbody tr.hi td{background:var(--accent-soft);color:var(--ink)}
tbody tr.hi td:first-child{color:var(--accent);box-shadow:inset 3px 0 0 var(--accent)}
td .na{color:var(--rule-strong)}
td.dn{color:var(--muted)}
.note{font-size:13px;color:var(--muted);margin:12px 0 0;max-width:96ch;line-height:1.55}
.note b{color:var(--ink-2);font-weight:600}

/* table toolbar (added by ui.js) */
.tt{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 8px}
.tt-f{position:relative;flex:0 1 260px;min-width:160px}
.tt-f svg{position:absolute;left:9px;top:50%;width:15px;height:15px;transform:translateY(-50%);fill:none;stroke:var(--muted);stroke-width:1.8;stroke-linecap:round;pointer-events:none}
.tt-f input{width:100%;height:32px;padding:0 10px 0 30px;border:1px solid var(--rule-strong);border-radius:var(--r-sm);background:var(--sheet);font-size:13px}
.tt-f input:focus{outline:0;border-color:var(--accent);box-shadow:var(--glow)}
.tt-n{font-size:12.5px;color:var(--muted);margin-right:auto}
.tt-n b{color:var(--ink-2);font-weight:550}
.tt-b{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 10px;border:1px solid var(--rule-strong);border-radius:var(--r-sm);background:var(--sheet);font-size:12.5px;font-weight:500;color:var(--ink-2)}
.tt-b svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tt-b:hover{border-color:var(--muted);color:var(--ink)}
.tt-hint{font-size:12px;color:var(--muted)}
th.sortable{padding:0}
th.sortable>button{all:unset;box-sizing:border-box;display:flex;flex-direction:column;align-items:flex-end;width:100%;padding:7px 12px;cursor:pointer;position:relative}
th.sortable:first-child>button{align-items:flex-start}
th.sortable>button:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
th.sortable>button:hover{color:var(--ink)}
th.sortable>button::after{content:"";position:absolute;right:3px;top:9px;width:6px;height:6px;opacity:0;border:solid currentColor;border-width:0 1.5px 1.5px 0;transform:rotate(45deg)}
th.sortable>button:hover::after{opacity:.35}
th[aria-sort="ascending"]>button::after{opacity:.9;transform:rotate(-135deg);top:12px}
th[aria-sort="descending"]>button::after{opacity:.9}
th[aria-sort]:not([aria-sort="none"]){color:var(--accent)}
tr.tt-empty td{text-align:left;white-space:normal;padding:22px 16px;color:var(--muted);cursor:default;position:static;background:var(--sheet)!important;box-shadow:none!important}
tr.tt-empty b{color:var(--ink-2)}
tr.tt-empty button{margin-left:8px;border:0;background:none;color:var(--accent);font-weight:500;padding:0;text-decoration:underline;text-underline-offset:2px}
td.copied,dd.copied{animation:flash .6s ease-out}
@keyframes flash{from{background:var(--accent-line)}}
/* Size sheet */
.sheets{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.sh{background:var(--sheet);border:1px solid var(--rule-strong);min-width:0}
.sh h3{padding:7px 12px;border-bottom:1px solid var(--rule-strong);display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.sh h3 small{font-family:var(--f-mono);font-size:11px;font-weight:400;color:var(--muted);letter-spacing:0}
.kv{display:grid;grid-template-columns:minmax(0,1fr) auto;margin:0}
.kv dt,.kv dd{padding:5px 12px;border-bottom:1px solid var(--rule);margin:0}
.kv dt{color:var(--muted);font-size:12.5px}
.kv dd{font-family:var(--f-mono);text-align:right;font-variant-numeric:tabular-nums}
.kv dd u{text-decoration:none;color:var(--muted);font-size:11px;margin-left:3px}
.kv>:nth-last-child(-n+2){border-bottom:0}

/* Calculators */
.calcs{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
.calc{background:var(--sheet);border:1px solid var(--rule-strong);padding:14px;min-width:0;display:flex;flex-direction:column;gap:10px}
.calc p{margin:0;color:var(--muted);font-size:12.5px}
.fg{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px}
.fg label{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:flex;flex-direction:column;min-width:0}
.fg label .sel{width:100%}
.out{border-top:1.5px solid var(--ink);padding-top:8px}
.big{font-family:var(--f-mono);font-size:22px;font-weight:500;color:var(--accent)}
.chip{display:inline-block;font-family:var(--f-mono);font-size:11px;padding:1px 7px;border-radius:3px}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.bad{background:var(--bad-soft);color:var(--bad)}
.calc table{font-size:12px}
.calc tbody tr{cursor:default}
tr.best td{background:var(--ok-soft)!important;color:var(--ok)}

/* Diagram */
.diag{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:12px}
.diag svg{width:100%;max-width:380px;height:auto;background:var(--sheet);border:1px solid var(--rule-strong)}
.diag .legend{font-size:12.5px;color:var(--muted);max-width:52ch;margin:0}
.diag .legend b{font-family:var(--f-mono);color:var(--ink)}
.s-ink{stroke:var(--ink);fill:none}
.s-fill{fill:var(--accent-soft);stroke:var(--ink);stroke-width:1.3}
.s-dim{stroke:var(--accent);stroke-width:1;fill:none}
.s-cl{stroke:var(--muted);stroke-dasharray:8 3 2 3;stroke-width:.8}
.t-dim{fill:var(--accent);font-family:var(--f-mono);font-size:11px}

.pv-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:14px;align-items:start;margin-bottom:16px}
@media (max-width:820px){.pv-grid{grid-template-columns:1fr}}
.pv-fig{background:var(--sheet);border:1px solid var(--rule-strong);border-radius:var(--radius,0);padding:10px;min-width:0}
.pv-svg{width:100%;max-width:440px;height:auto;display:block;margin:0 auto}
.pv-shadow{stroke:rgba(0,0,0,.18);stroke-width:6}
.pv-cl{stroke:var(--muted);stroke-width:.8;stroke-dasharray:10 3 2 3;opacity:.7}
.pv-dim{stroke:var(--accent);stroke-width:1.3;fill:none}
.pv-dimi{stroke:#9fd3ff}
.pv-ah{fill:var(--accent)}
.pv-dimi~* .pv-ah{fill:#9fd3ff}
.pv-ext{stroke:var(--muted);stroke-width:.8;fill:none}
.pv-lead{stroke:var(--accent);stroke-width:1.1}
.pv-dot{fill:var(--accent)}
.pv-lblbg{fill:var(--sheet)}
.pv-t{fill:var(--accent);font-family:var(--f-mono);font-size:13px;font-weight:500}
.pv-ti{fill:#cfe9ff;font-family:var(--f-mono);font-size:13px;font-weight:500}
.pv-tm{fill:var(--muted);font-family:var(--f-body);font-size:11px}
.pv-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;justify-content:center}
.pv-chips button{display:flex;flex-direction:column;align-items:center;line-height:1.15;padding:5px 9px;border:1px solid var(--rule-strong);border-radius:6px;background:transparent;cursor:pointer;min-width:52px}
.pv-chips button b{font-family:var(--f-mono);font-size:12.5px;font-weight:500}
.pv-chips button small{font-family:var(--f-mono);font-size:10.5px;color:var(--muted)}
.pv-chips button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--sheet)}
#mp-fl #mpm-fl{display:none}
.sw-edge>*,.sw-edge2{fill:none;stroke:#3a4046;stroke-width:var(--sw)}
.sw-edge2{stroke-width:calc(var(--sw) * .7)}
/* drawing panels use the same dark drafting backdrop in both themes so the metal shapes keep their contrast */
.pv-fig{background:linear-gradient(var(--rule) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,var(--rule) 1px,transparent 1px) 0 0/24px 24px,#FAFBFD!important;border:1px solid var(--rule)!important;border-radius:var(--r);box-shadow:var(--sh-1)}
:root[data-theme="dark"] .pv-fig{background:linear-gradient(rgba(44,59,84,.5) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,rgba(44,59,84,.5) 1px,transparent 1px) 0 0/24px 24px,#0B1424!important}
#mp-bw #mpm-bw,#mp-bw #mpk-bw{display:none}
.pv-list{display:flex;flex-direction:column}
.pv-lh{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:9px 12px 5px}
.pv-list button{display:flex;justify-content:space-between;gap:10px;align-items:baseline;background:transparent;border:0;border-top:1px solid var(--rule);padding:6px 12px;cursor:pointer;text-align:left;color:var(--ink)}
.pv-list button span{font-size:12.5px;color:var(--muted)}
.pv-list button b{font-family:var(--f-mono);font-weight:500;font-variant-numeric:tabular-nums}
.pv-list button b u{text-decoration:none;font-size:11px;color:var(--muted);margin-left:3px}
.pv-list button:hover:not(:disabled){background:var(--accent-soft)}
.pv-list button.on{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--accent)}
.pv-list button.on span{color:var(--ink)}
.pv-list button:disabled{opacity:.4;cursor:default}
.pv-chips .ctrl{display:flex;flex-direction:column;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

.pv-3d{position:absolute;top:8px;right:8px;z-index:2;border:1px solid var(--accent);color:var(--accent);background:var(--sheet);border-radius:6px;padding:5px 11px;font-family:var(--f-mono);font-size:12px;cursor:pointer}
.pv-3d:hover,.pv-3d[aria-pressed="true"]{background:var(--accent);color:var(--sheet)}
.pv-chips button:disabled{opacity:.35;cursor:default}
.pv-chips button[aria-pressed="true"] small{color:inherit;opacity:.85}
.pv-data{background:var(--sheet);border:1px solid var(--rule-strong);border-radius:var(--radius,0);min-width:0}
.pv-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:1.5px solid var(--rule-strong)}
.pv-stat{padding:12px;border-left:1px solid var(--rule);min-width:0}
.pv-stat:first-child{border-left:0}
.pv-stat span{display:block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.pv-stat b{display:block;font-family:var(--f-mono);font-size:22px;font-weight:500;color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap}
.pv-stat b u{text-decoration:none;font-size:11px;color:var(--muted);margin-left:3px}
@media (max-width:420px){.pv-stat b{font-size:18px}}
.pv-eq{color:var(--muted);font-size:11px}
.pv-step{display:inline-flex;gap:4px;align-items:center;margin-top:3px}
.pv-step .sel{margin-top:0}
.pv-nav{border:1px solid var(--rule-strong);background:var(--sheet);border-radius:4px;width:30px;height:30px;cursor:pointer;font-size:16px;line-height:1}
.pv-nav:disabled{opacity:.35;cursor:default}
details.pv-all{border-top:1.5px solid var(--ink);padding-top:10px}
details.pv-all>summary{cursor:pointer;font-family:var(--f-display);font-size:19px;font-weight:600;list-style-position:inside}
.ct-card{display:flex;flex-wrap:wrap;align-items:center;gap:16px 20px;background:var(--sheet);border:1px solid var(--rule-strong);border-radius:var(--radius,0);padding:20px;max-width:720px}
.ct-card>svg{width:44px;height:44px;flex:none;stroke:var(--accent);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ct-card .lbl{display:block;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.ct-mail{font-family:var(--f-mono);font-size:19px;color:var(--accent);text-decoration:none;word-break:break-all}
.ct-mail:hover{text-decoration:underline}
.ct-btns{display:flex;gap:8px;margin-left:auto;flex-wrap:wrap}
.ct-btn{font:600 13px var(--f-body);border:1px solid var(--rule-strong);background:transparent;color:var(--ink);border-radius:6px;padding:8px 14px;cursor:pointer;text-decoration:none}
.ct-btn.pri{background:var(--accent);border-color:var(--accent);color:var(--on-accent,#fff)}
.isofr{border:1px solid var(--rule-strong);background:#f3f4f1;overflow:hidden}
.isofr iframe{display:block;width:100%;height:max(640px,calc(100vh - 110px));border:0}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* Valve access figure */
.fig{background:#fff;border:1px solid var(--rule-strong);overflow:auto;max-height:80vh}
.fig img{display:block;width:100%;max-width:none;height:auto;cursor:zoom-in}
.fig.zoom img{width:auto;cursor:zoom-out}
.vtbl tbody tr{cursor:default}
.vtbl td{white-space:normal;text-align:left}

/* Pipe spacing */
.spgrid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:14px;align-items:start}
@media (max-width:860px){.spgrid{grid-template-columns:1fr}}
.spline{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px;padding:10px 0;border-bottom:1px solid var(--rule)}
.spline:last-of-type{border-bottom:0}
.spline h3{grid-column:1/-1;font-size:16px}
.spline label,.mxc label{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:flex;flex-direction:column;min-width:0}
.spline .sel,.mxc .sel{width:100%}
.inp:disabled{opacity:.45}
.spsvg{width:100%;height:auto;display:block;background:var(--sheet)}
.sp-pipe{fill:var(--accent-soft);stroke:var(--ink);stroke-width:1.2}
.sp-ins{fill:var(--hi);stroke:var(--hi-ink);stroke-width:.8;stroke-dasharray:3 2}
.sp-flg{fill:none;stroke:var(--accent);stroke-width:1.2;stroke-dasharray:6 3}
.sp-gap{fill:var(--ok-soft);stroke:none}
.sp-t{fill:var(--ink);font-family:var(--f-mono);font-size:11px}
.sp-tm{fill:var(--muted);font-family:var(--f-body);font-size:10px}
.cases td:nth-child(2),.cases td:nth-child(3){text-align:left}
.cases tbody tr{cursor:default}
.mxc{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end;margin:22px 0 10px}
.mxc h3{flex:1 1 100%;font-size:20px}
.mx td{cursor:pointer;padding:4px 7px}
.mx td:hover{background:var(--accent-soft)}
.mx td.on{background:var(--accent);color:var(--sheet);font-weight:500}
.mx td.dg{color:var(--muted)}
.mx tbody tr{cursor:default}
.mx th.colh{text-align:right}
.mx td.rowon,.mx th.colon{color:var(--accent)}

/* Shoe spool length */
.shoe-grid{display:grid;grid-template-columns:minmax(280px,360px) minmax(0,1fr);gap:14px;align-items:start}
@media (max-width:860px){.shoe-grid{grid-template-columns:1fr}}
.shoe-kpi{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px}
.shoe-kpi>div{border:1px solid var(--rule);padding:8px 10px;background:var(--paper)}
.shoe-kpi .lbl{display:block;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.shoe-kpi .val{font-size:17px}
.shoe-svg{width:100%;height:auto;display:block;background:var(--sheet);border:1px solid var(--rule-strong)}
.fg label.chk{flex-direction:row;align-items:center;gap:6px;grid-column:1/-1}
.vd-two{grid-template-columns:minmax(240px,320px) minmax(0,1fr)}
@media (max-width:820px){.vd-two{grid-template-columns:1fr}}
.vd-two>*{min-width:0}
#vdt,#eqT,#eqD,#accc,#accv{flex-wrap:wrap;max-width:100%}
#vdt button,#eqT button,#eqD button{border-bottom:1px solid var(--rule-strong);margin-bottom:-1px}
#p-vdim .ctrls,#p-eqck .ctrls,#p-acc .ctrls{min-width:0;max-width:100%}

/* Equipment data verification checklist */
.eq-xl{background:var(--sheet);border:1px solid var(--rule-strong);padding:10px 12px;margin-bottom:12px}
.eq-xl summary{cursor:pointer;font-family:var(--f-display);font-size:17px;font-weight:600}
.eq-xl ol{margin:10px 0;padding-left:22px;display:grid;gap:8px}
.eq-xl li span{color:var(--muted);font-size:12.5px}
.eq-xl label.eq-btn{display:inline-block}
.eq-btn[disabled]{opacity:.45;cursor:not-allowed}
.eq-xlmsg{font-size:12.5px}.eq-xlmsg.err{color:var(--bad)}.eq-xlmsg.ok{color:var(--ok)}
.eq-xlmsg ul{margin:4px 0 0;padding-left:18px}
.eq-custom{background:var(--hi);color:var(--hi-ink);border:1px solid var(--hi-ink);padding:8px 12px;margin-bottom:12px;font-size:13px}

.eq-head{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px;background:var(--sheet);border:1px solid var(--rule-strong);padding:12px;margin-bottom:12px}
.eq-head label{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:flex;flex-direction:column;min-width:0}
.eq-bar{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;justify-content:space-between;margin-bottom:12px;position:sticky;top:0;z-index:2;background:var(--paper);padding:8px 0;border-bottom:1px solid var(--rule)}
.eq-prog{font-family:var(--f-mono);font-size:13px}
.eq-prog b{color:var(--accent)}.eq-prog b.bad{color:var(--bad)}
.eq-meter{height:6px;background:var(--rule);border-radius:3px;overflow:hidden;width:160px;display:inline-block;vertical-align:middle;margin-left:8px}
.eq-meter i{display:block;height:100%;background:var(--accent)}
.eq-btn{background:var(--sheet);border:1px solid var(--rule-strong);border-radius:4px;padding:5px 12px;cursor:pointer;font-family:var(--f-mono);font-size:12.5px}
.eq-btn:hover{border-color:var(--ink)}.eq-btn.warn{color:var(--bad);border-color:var(--bad)}
.eq-tog{display:inline-flex;gap:6px;align-items:center;font-size:12.5px;color:var(--muted);cursor:pointer}
.eq-sec{background:var(--sheet);border:1px solid var(--rule-strong);margin-bottom:12px}
.eq-sec>h3{padding:9px 12px;border-bottom:1px solid var(--rule-strong);display:flex;justify-content:space-between;gap:8px;align-items:baseline}
.eq-sec>h3 small{font-family:var(--f-mono);font-size:12px;font-weight:400;color:var(--muted)}
.eq-sec.gen>h3{background:var(--accent-soft)}
.eq-cols{display:grid;grid-template-columns:40px minmax(0,1.1fr) minmax(0,.8fr) minmax(0,1.4fr) 120px;gap:12px;padding:6px 12px;border-bottom:1px solid var(--rule);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.eq-row{display:grid;grid-template-columns:40px minmax(0,1.1fr) minmax(0,.8fr) minmax(0,1.4fr) 120px;gap:4px 12px;padding:9px 12px;border-bottom:1px solid var(--rule);align-items:start}
.eq-row:last-child{border-bottom:0}
.eq-row .no{font-family:var(--f-mono);font-size:12px;color:var(--muted);padding-top:1px}
.eq-row .da{font-size:13.5px;font-weight:500}
.eq-row .ag{font-size:12.5px;color:var(--accent)}
.eq-row .wy{font-size:12.5px;color:var(--muted)}
.eq-row .ag::before,.eq-row .wy::before{display:none;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.eq-ck{display:flex;gap:12px;justify-content:flex-end}
.eq-ck label{display:inline-flex;gap:5px;align-items:center;font-family:var(--f-mono);font-size:12px;cursor:pointer;white-space:nowrap}
.eq-ck input{width:16px;height:16px;margin:0;cursor:pointer}
.eq-ck label.ok input{accent-color:var(--ok)}.eq-ck label.nok input{accent-color:var(--bad)}
.eq-row.s-ok{background:color-mix(in srgb,var(--ok-soft) 45%,transparent)}
.eq-row.s-nok{background:color-mix(in srgb,var(--bad-soft) 55%,transparent)}
.eq-row .rm{grid-column:2/-1;display:none}
.eq-row.s-nok .rm{display:block}
#p-eqck.nowhy .wy,#p-eqck.nowhy .eq-cols .h-wy{display:none}
#p-eqck.nowhy .eq-row,#p-eqck.nowhy .eq-cols{grid-template-columns:40px minmax(0,1.4fr) minmax(0,1fr) 120px}
@media (max-width:760px){
 .eq-cols{display:none}
 .eq-row,#p-eqck.nowhy .eq-row{grid-template-columns:30px minmax(0,1fr)}
 .eq-row .ag,.eq-row .wy,.eq-row .eq-ck,.eq-row .rm{grid-column:2}
 .eq-row .ag::before{content:"Verify against";display:block}
 .eq-row .wy::before{content:"Why it matters";display:block}
 .eq-ck{justify-content:flex-start}
}
@media print{
 .tb,nav.tabs,footer,.eq-bar button,.eq-tog,.eq-hide-print,#eqT,#eqD,.phead .ctrls{display:none!important}
 body{background:#fff;color:#000}.eq-bar{position:static}
 .eq-row{break-inside:avoid}.eq-row .rm{display:block!important;border:0;padding:0}
}

/* References block under every tab */
.refs{margin-top:22px;border-top:1.5px solid var(--ink);padding-top:10px}
.refs h3{font-size:18px;margin-bottom:2px}
.refs>p{margin:0 0 8px;color:var(--muted);font-size:12.5px;max-width:95ch}
.refs ol{margin:0;padding-left:22px;display:grid;gap:5px;font-size:13px}
.refs li a{word-break:break-word}
.refs .k{display:inline-block;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.04em;padding:1px 6px;border-radius:3px;margin-right:6px;vertical-align:1px}
.refs .k.std{background:var(--accent-soft);color:var(--accent)}
.refs .k.free{background:var(--ok-soft);color:var(--ok)}
.refs .k.vendor{background:var(--hi);color:var(--hi-ink)}
.refs li small{display:block;color:var(--muted);font-size:12px}
@media print{.refs a::after{content:" (" attr(href) ")";font-size:10px;color:#555;word-break:break-all}}
/* ---------- model panel: clickable dimensions + 3D ---------- */
.mp{background:var(--sheet);border:1px solid var(--rule);margin-bottom:16px;overflow:hidden}
.mp-head{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--rule)}
.mp-head h3{font-size:19px}
.mp-head .ctx{font-family:var(--f-mono);font-size:12.5px;color:var(--muted)}
.mp-body{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,1fr)}
@media (max-width:760px){.mp-body{grid-template-columns:1fr}}
.mp-stage{position:relative;min-height:300px;background:
  linear-gradient(var(--rule) 1px,transparent 1px) 0 0/24px 24px,
  linear-gradient(90deg,var(--rule) 1px,transparent 1px) 0 0/24px 24px,var(--paper);
  background-blend-mode:normal;border-right:1px solid var(--rule)}
:root[data-theme="dark"] .mp-stage{background:
  linear-gradient(rgba(53,86,106,.35) 1px,transparent 1px) 0 0/24px 24px,
  linear-gradient(90deg,rgba(53,86,106,.35) 1px,transparent 1px) 0 0/24px 24px,#0B161D}
.mp-stage svg{display:block;width:100%;height:auto;max-height:420px}
.mp-stage canvas{display:block;width:100%;height:360px;cursor:grab;touch-action:none;background:radial-gradient(ellipse at 50% 42%,rgba(143,179,199,.16),transparent 68%)}
.mp-head .ctrls{flex-wrap:wrap;justify-content:flex-end}
.mp-head .seg{flex-wrap:wrap}
.mp-stage canvas:active{cursor:grabbing}
.mp-tip{position:absolute;left:12px;bottom:10px;font-size:12px;color:var(--muted);pointer-events:none}
.mp-list{padding:6px 0;display:flex;flex-direction:column}
.mp-list button{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:8px;align-items:baseline;text-align:left;background:none;border:0;border-left:3px solid transparent;padding:8px 14px;cursor:pointer;color:var(--ink);position:relative;overflow:hidden}
.mp-list button b{font-family:var(--f-mono);font-size:13px;color:var(--accent)}
.mp-list button span{font-size:13px;color:var(--muted)}
.mp-list button i{font-style:normal;font-family:var(--f-mono);font-size:15px}
.mp-list button:hover{background:color-mix(in srgb,var(--paper) 55%,transparent)}
.mp-list button.on{border-left-color:var(--accent);background:var(--paper)}
.mp-list button.on span{color:var(--ink)}
.mp-note{font-size:12px;color:var(--muted);padding:8px 14px;border-top:1px solid var(--rule);margin:0}
/* dimension groups in drawings */
.dimg{cursor:pointer}
.dimg .s-dim,.dimg .t-dim{transition:stroke .15s,fill .15s,stroke-width .15s,opacity .15s}
.mp svg.has-on .dimg:not(.on){opacity:.35}
.dimg.on .s-dim{stroke-width:2.2}
.dimg.on .t-dim{font-weight:700;font-size:13px}
.dimg .hit{stroke:transparent;stroke-width:16;fill:none}
.mp .s-fill{fill:color-mix(in srgb,var(--steel) 28%,transparent);stroke:var(--steel)}
.mp .s-ink{stroke:var(--steel)}
.mp .val{font-family:var(--f-mono);font-size:13px;fill:var(--ink);paint-order:stroke;stroke:var(--paper);stroke-width:4px}
@media print{.mp-stage canvas,.home-hero .stage,nav.tabs,#thBtn,.mp-head .ctrls{display:none!important}
 :root[data-theme="dark"],:root{--paper:#fff;--sheet:#fff;--ink:#15212a;--muted:#4b5a63;--rule:#d3dbdd;--rule-strong:#9fb0b6;--accent:#0d5d8c;--accent-soft:#e1edf4;--hi:#fbefd4;--hi-ink:#7a4d00;--ok:#1d7a46;--ok-soft:#e0f2e7;--bad:#a4302a;--bad-soft:#f8e3e1;--steel:#4F7488;color-scheme:light}
 .wrap{display:block!important;padding:0!important}.wrap>*{max-width:none!important}body{background:#fff!important}
 *,*::before,*::after{transition:none!important;animation:none!important}
 :root[data-theme="dark"] .mp-stage{background:#fff}}
.acc-stage svg{max-height:380px}.acc-row{cursor:pointer}.acc-row:hover td{background:color-mix(in srgb,var(--paper) 60%,transparent)}
.acc-cmp{cursor:pointer}.acc-cmp.on rect{stroke-width:3}.acc-cmp:hover rect{stroke-width:2.5}

nav.tabs a.navbtn{text-decoration:none}

/* dimension values written on the model drawings: halo so they read over the part */
.mp-stage .dimg .t-dim{font-size:10px;paint-order:stroke;stroke:var(--sheet);stroke-width:3px;stroke-linejoin:round}
.mp-list button i{max-width:20ch;text-align:right;justify-self:end}
.mp-stage .dimg.on .t-dim{font-size:11px}
/* =====================================================================
   Redesign layer over the component rules above
   ===================================================================== */
/* surfaces: one border weight, one radius per level */
.sh,.calc,.eq-sec,.eq-head,.eq-xl,.pv-data,.mp,.ct-card,.diag svg,.fig,.shoe-svg,.isofr{border:1px solid var(--rule)!important;border-radius:var(--r);background:var(--sheet);box-shadow:var(--sh-1)}
.sh,.pv-data,.mp,.eq-sec{overflow:hidden}
.sh h3,.eq-sec>h3{padding:10px 14px;font-size:14px;border-bottom:1px solid var(--rule)}
.sh h3 small,.eq-sec>h3 small{font-family:var(--f-body);font-size:12px;color:var(--muted)}
.kv dt,.kv dd{padding:7px 14px}
.kv dt{font-size:13px}
.kv dd{font-family:var(--f-body);font-weight:550;color:var(--ink);font-size:13.5px}
.kv dd u,.pv-stat b u,.pv-list button b u,.hm-read dd u{font-weight:400}
.sheets{gap:16px}
.calcs{gap:16px}
.calc{padding:16px}
.calc h3{font-size:15px}
.out{border-top:1px solid var(--rule);padding-top:10px}
.big{font-family:var(--f-body);font-size:24px;font-weight:600;letter-spacing:-.01em;color:var(--accent)}
.chip{font-family:var(--f-body);font-size:12px;font-weight:500;padding:2px 8px;border-radius:999px}
.fg label,.spline label,.mxc label,.eq-head label{font-size:12px;letter-spacing:0;text-transform:none;gap:4px}
.ct-btn{border-radius:var(--r-sm);font-family:var(--f-body)}
.ct-mail{font-family:var(--f-body);font-weight:550}
.eq-btn,.thbtn{font-family:var(--f-body);border-radius:var(--r-sm)}
.eq-bar{top:var(--top);background:color-mix(in srgb,var(--paper) 92%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.eq-prog,.eq-row .no,.eq-ck label{font-family:var(--f-body)}
.shoe-kpi>div{border-radius:var(--r-sm);border-color:var(--rule)}
details.pv-all{border-top:1px solid var(--rule);padding-top:14px}
details.pv-all>summary{font-size:16px;font-family:var(--f-body)}
details>summary{color:var(--ink-2)}
.pv-stat span{text-transform:none;letter-spacing:0;font-size:12px}
.pv-stat b{font-family:var(--f-body);font-weight:600;letter-spacing:-.01em}
.pv-list button b{font-family:var(--f-body);font-weight:550}
.pv-chips button b,.pv-chips button small{font-family:var(--f-body)}
.pv-chips button{border-radius:var(--r-sm)}
.pv-nav{border-radius:var(--r-sm);width:34px;height:34px;border-color:var(--rule-strong)}
.pv-3d{font-family:var(--f-body);border-radius:var(--r-sm)}
.mp-head{padding:12px 16px}
.mp-head h3{font-size:15px}
.mp-head .ctx{font-family:var(--f-body)}
.mp-list button b{font-family:var(--f-body);font-weight:600}
.mp-list button i{font-family:var(--f-body);font-weight:550;font-size:14px}
.mp-list button.on{background:var(--accent-soft)}
.mp-list button:hover{background:var(--paper)}
.mp-stage{background:linear-gradient(var(--rule) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,var(--rule) 1px,transparent 1px) 0 0/24px 24px,#FAFBFD;border-right:1px solid var(--rule)}
:root[data-theme="dark"] .mp-stage{background:linear-gradient(rgba(44,59,84,.5) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,rgba(44,59,84,.5) 1px,transparent 1px) 0 0/24px 24px,#0B1424}
.mp-stage canvas{background:none}
.mp .val{font-family:var(--f-body)}
.t-dim,.sp-t,.pv-t,.pv-ti{font-family:var(--f-body)}
.refs{margin-top:28px;border-top:1px solid var(--rule);padding-top:16px}
.refs h3{font-size:15px;margin-bottom:4px}
.refs .k{font-family:var(--f-body);font-size:11.5px;font-weight:500;border-radius:999px;padding:1px 8px;letter-spacing:0}
.eq-custom{border-radius:var(--r-sm)}
.ripple{display:none}
.panel.enter{animation:none}
#vdt button,#eqT button,#eqD button{border-bottom:0;margin-bottom:0}
.isofr{background:#f3f4f1;overflow:hidden}
.isofr iframe{height:max(640px,calc(100vh - 140px))}
/* copyable values */
[data-copy],.kv dd,.pv-stat b{cursor:copy}
.kv dd:hover,.pv-stat b:hover{color:var(--accent)}

/* ---------- home ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:40px;align-items:center;padding:16px 0 40px;border-bottom:1px solid var(--rule);margin-bottom:32px}
.hero-copy h2{font-size:38px;line-height:1.12;letter-spacing:-.025em;font-weight:620;max-width:16ch}
.hero-copy>p{font-size:15.5px;line-height:1.6;color:var(--muted);max-width:50ch;margin:14px 0 24px}
.hero-search{display:flex;align-items:center;gap:10px;width:100%;max-width:460px;height:48px;padding:0 12px 0 14px;border:1px solid var(--rule-strong);border-radius:10px;background:var(--sheet);box-shadow:var(--sh-2);color:var(--muted);font-size:15px;text-align:left}
.hero-search span{flex:1}
.hero-search svg{width:19px;height:19px;color:var(--accent)}
.hero-search:hover{border-color:var(--accent)}
.hero-try{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:12px;font-size:12.5px;color:var(--muted)}
.hero-try span{margin-right:4px}
.hero-try button{border:1px solid var(--rule);background:var(--sheet);color:var(--ink-2);border-radius:var(--r-sm);padding:4px 9px;font-size:12.5px;font-weight:500}
.hero-try button:hover{border-color:var(--accent);color:var(--accent)}
.hero-model{margin:0;border-radius:var(--r-lg);overflow:hidden;background:var(--bp);color:var(--bp-ink);box-shadow:0 1px 2px rgba(15,27,45,.1),0 20px 40px -24px rgba(14,36,64,.6)}
.hero-model .stage{position:relative;border:0;border-radius:0;background:radial-gradient(ellipse at 50% 45%,rgba(140,200,255,.12),transparent 65%),linear-gradient(var(--bp-line) 1px,transparent 1px) 0 0/24px 24px,linear-gradient(90deg,var(--bp-line) 1px,transparent 1px) 0 0/24px 24px,var(--bp)}
.hero-model canvas{display:block;width:100%;height:300px;cursor:grab;touch-action:none}
.hero-model canvas:active{cursor:grabbing}
.hero-model figcaption{border-top:1px solid rgba(140,200,255,.14);background:var(--bp-2)}
.hm-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 12px;padding:12px 16px 0;font-size:12.5px}
.hm-head b{font-weight:550;color:var(--bp-ink)}
.hm-head span{color:var(--bp-muted)}
.hm-read{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:6px 6px 10px}
.hm-read>div{padding:8px 10px;min-width:0}
.hm-read dt{font-size:12px;color:var(--bp-muted)}
.hm-read dd{margin:2px 0 0;font-size:18px;font-weight:600;letter-spacing:-.01em;color:var(--bp-accent);white-space:nowrap}
.hm-read dd u{text-decoration:none;font-size:12px;color:var(--bp-muted);margin-left:3px}
.hm-read dd:hover{color:#fff}
.dir-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:4px 16px;margin-bottom:16px}
.dir-head h2{font-size:20px}
.dir-head p{margin:0;color:var(--muted);font-size:13.5px}
.dir{columns:3 300px;column-gap:20px}
.dir-grp{break-inside:avoid;margin:0 0 20px;background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r);box-shadow:var(--sh-1);overflow:hidden}
.dir-grp h3{font-size:13px;font-weight:550;color:var(--muted);padding:10px 16px;border-bottom:1px solid var(--rule);background:var(--paper-2)}
:root[data-theme="dark"] .dir-grp h3{background:#0D1626}
.dir-grp ul{list-style:none;margin:0;padding:4px 0}
.dir-grp a{display:grid;grid-template-columns:20px minmax(0,1fr) auto;gap:12px;align-items:start;padding:10px 16px;text-decoration:none;color:var(--ink)}
.dir-grp a svg{width:20px;height:20px;margin-top:1px;fill:none;stroke:var(--accent);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.dir-grp a b{display:block;font-weight:550;font-size:14px}
.dir-grp a small{display:block;color:var(--muted);font-size:12.5px;line-height:1.45;margin-top:1px}
.dir-grp a em{font-style:normal;font-size:11.5px;color:var(--muted);border:1px solid var(--rule);border-radius:999px;padding:1px 7px;white-space:nowrap;margin-top:1px}
.dir-grp a:hover{background:var(--paper)}
.dir-grp a:hover b{color:var(--accent)}
.dir-grp li+li a{border-top:1px solid var(--rule)}

/* ---------- footer ---------- */
.foot{margin-top:auto;border-top:1px solid var(--rule);background:var(--sheet);padding:28px 32px 20px;font-size:13px;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1.4fr) minmax(0,.8fr) minmax(0,.8fr);gap:28px;max-width:1336px}
.foot h3{font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.foot-brand b{display:block;color:var(--ink);font-size:15px;font-weight:650;margin-bottom:6px}
.foot-brand p{margin:0 0 10px;line-height:1.55;max-width:44ch}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.foot-std b{color:var(--ink-2);font-weight:550}
.foot-links a,.foot-mail{color:var(--ink-2);text-decoration:none}
.foot-links a:hover,.foot-mail:hover{color:var(--accent);text-decoration:underline}
.foot-note{margin:24px 0 0;padding-top:14px;border-top:1px solid var(--rule);font-size:12px;max-width:1336px}

/* ---------- search dialog ---------- */
.cmdk{position:fixed;inset:0;z-index:60;background:rgba(10,20,36,.36);display:flex;justify-content:center;align-items:flex-start;padding:12vh 12px 12px}
.cmdk[hidden]{display:none}
.cmdk-box{width:min(680px,100%);max-height:76vh;display:flex;flex-direction:column;background:var(--sheet);border-radius:var(--r-lg);box-shadow:var(--sh-pop);overflow:hidden}
.cmdk-in{display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid var(--rule);color:var(--muted)}
.cmdk-in svg{width:19px;height:19px}
.cmdk-in input{flex:1;min-width:0;height:52px;border:0;background:transparent;font-size:16px;color:var(--ink);outline:none}
.cmdk-in input::-webkit-search-cancel-button{display:none}
.cmdk-list{overflow-y:auto;padding:6px;overscroll-behavior:contain}
.cmdk-g{padding:10px 10px 4px;font-size:12px;font-weight:500;color:var(--muted)}
.cmdk-it{display:flex;gap:12px;align-items:flex-start;padding:9px 10px;border-radius:var(--r);cursor:pointer;color:var(--ink)}
.cmdk-it[aria-selected="true"]{background:var(--accent-soft)}
.cmdk-it>svg{width:18px;height:18px;flex:none;margin-top:2px;fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cmdk-it[aria-selected="true"]>svg{stroke:var(--accent)}
.cmdk-it .ci-b{flex:1;min-width:0}
.cmdk-it .ci-t{font-weight:550;font-size:14px}
.cmdk-it .ci-d{font-size:12.5px;color:var(--muted);margin-top:1px}
.cmdk-it .ci-s{font-size:11.5px;color:var(--muted);white-space:nowrap;margin-top:2px}
.cmdk-it mark{background:none;color:var(--accent);font-weight:650}
.ans{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:6px 12px;margin-top:8px}
.ans div{min-width:0}
.ans span{display:block;font-size:11.5px;color:var(--muted)}
.ans b{display:block;font-size:15px;font-weight:600;color:var(--ink);white-space:nowrap}
.ans b u{text-decoration:none;font-weight:400;font-size:11.5px;color:var(--muted);margin-left:2px}
.ans-x{font-size:13px;color:var(--bad);margin-top:4px}
.ci-copy{flex:none;height:28px;padding:0 9px;border:1px solid var(--rule-strong);border-radius:var(--r-sm);background:var(--sheet);font-size:12px;font-weight:500;color:var(--ink-2)}
.ci-copy:hover{border-color:var(--accent);color:var(--accent)}
.cmdk-empty{padding:28px 16px;text-align:center;color:var(--muted);font-size:13.5px;line-height:1.6}
.cmdk-empty b{color:var(--ink)}
.cmdk-empty button{border:1px solid var(--rule);background:var(--sheet);border-radius:var(--r-sm);padding:3px 8px;margin:6px 2px 0;font-size:12.5px;color:var(--ink-2)}
.cmdk-foot{display:flex;gap:16px;padding:8px 14px;border-top:1px solid var(--rule);font-size:12px;color:var(--muted);background:var(--paper)}
.cmdk-foot kbd{margin-right:3px}

/* toast */
.toast{position:fixed;left:50%;bottom:24px;z-index:70;transform:translate(-50%,8px);opacity:0;pointer-events:none;background:var(--ink);color:var(--sheet);padding:9px 14px;border-radius:var(--r);font-size:13px;font-weight:500;box-shadow:var(--sh-pop);transition:opacity .15s,transform .15s;max-width:calc(100% - 32px)}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media (max-width:1180px){.foot-grid{grid-template-columns:1fr 1fr}.hero{grid-template-columns:1fr;gap:28px}.hero-copy h2{max-width:22ch}}
@media (max-width:960px){
  .app{grid-template-columns:1fr}
  .side{position:fixed;left:0;top:0;bottom:0;width:min(300px,86vw);transform:translateX(-102%);visibility:hidden;transition:transform .2s ease,visibility 0s linear .2s;box-shadow:var(--sh-pop)}
  body.nav-open .side{transform:none;visibility:visible;transition:transform .2s ease}
  body.nav-open{overflow:hidden}
  .scrim{position:fixed;inset:0;z-index:25;background:rgba(10,20,36,.36)}
  .menu{display:inline-grid}
  .top{padding:0 16px;gap:10px}
  .top-brand{display:block}
  .searchbtn{max-width:none}
  .tc-l{display:none}
  .content{padding:16px 16px 40px}
  .foot{padding:24px 16px 16px}
  .sb-k{display:none}
}
@media (max-width:640px){
  .top-brand{display:none}
  .top{padding:0 12px;gap:8px}
  .searchbtn{flex:0 0 36px;width:36px;padding:0;justify-content:center}
  .searchbtn .sb-t{display:none}
  .top-ctrls{gap:8px}
  .top .sel{max-width:118px;padding-left:8px;padding-right:24px;background-position:right 6px center}
  .seg button{padding:4px 8px}
  .seg button{padding:4px 9px}
  .hero{padding-top:4px}
  .hero-copy h2{font-size:28px}
  .hm-read{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-model canvas{height:240px}
  .foot-grid{grid-template-columns:1fr}
  .dir{columns:1}
  .tt-f{flex:1 1 100%}
  .cmdk{padding:8px}
  .cmdk-box{max-height:calc(100vh - 16px)}
  .cmdk-foot{display:none}
  h2{font-size:21px}
  .pagebar .stds{display:none}
}
@media (pointer:coarse){
  .navbtn{min-height:42px}
  .seg button{min-height:34px}
  .icobtn{width:40px;height:40px}
  .searchbtn{height:40px}
  .tt-b,.tt-f input{height:38px}
  select.sel,input.inp{min-height:40px;font-size:16px}
  .pv-chips button{min-height:42px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{
  .side,.top,.foot,.tt,.cmdk,.toast,.pagebar,.scrim{display:none!important}
  .app{display:block}.content{padding:0;max-width:none}
}

.diag .legend b,.note b{font-family:var(--f-body)}
@media (max-width:380px){.top .sel{max-width:98px}.top .seg button{padding:4px 6px}.top{gap:6px}}

/* ---------- clickable dimensions on pv drawings (matches the Figure-8 panel) ---------- */
.pv-fig .pv-dimi{stroke:#9fd3ff}
.pv-ibg{fill:#0b0e11;opacity:.8}
.pv-lblbg{fill:var(--sheet);stroke:var(--rule);stroke-width:1}
.pv-fig .pv-t{fill:var(--accent);font-size:12.5px;font-weight:550}
.pv-fig .pv-tm{fill:var(--muted)}
.pv-fig .dimg{cursor:pointer;outline:none}
.pv-fig .dimg .hit{stroke:transparent;stroke-width:16;fill:none;pointer-events:stroke}
.pv-fig .dimg polyline.hit{stroke-width:8}
.pv-fig .dimg>*{transition:opacity .15s,stroke-width .15s}
.pv-fig .dimg:hover .pv-dim{stroke-width:2}
.pv-fig .dimg:hover .pv-lblbg{stroke:var(--accent)}
.pv-fig svg.has-on .dimg:not(.on){opacity:.3}
.pv-fig .dimg.on .pv-dim{stroke-width:2.6}
.pv-fig .dimg.on .pv-ext{stroke:var(--accent);opacity:.8}
.pv-fig .dimg.on .pv-lblbg{fill:var(--accent);stroke:var(--accent)}
.pv-fig .dimg.on .pv-t{fill:var(--on-accent);font-weight:700}
.pv-fig .dimg.on .pv-ti{font-weight:700;fill:#fff}
.pv-fig .dimg.on .pv-ibg{opacity:1;fill:var(--accent)}
.pv-fig .dimg.on .pv-dot{r:3.6}
.pv-dims{border-bottom:1px solid var(--rule);padding:0 0 6px}
.pv-lh{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 12px;align-items:baseline;font-size:13px;font-weight:600;color:var(--ink);letter-spacing:0;text-transform:none;padding:12px 14px 6px}
.pv-lh span{font-size:12px;font-weight:400;color:var(--muted)}
.pv-dims button{grid-template-columns:52px minmax(0,1fr) auto}
.pv-dims button.on{border-left-color:var(--accent);background:var(--accent-soft)}
.pv-dims button.on b{color:var(--accent)}
.pv-dims button.on i{color:var(--accent)}
.pv-dims button:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.pv-data .kv{border-top:0}
@media (prefers-reduced-motion:reduce){.pv-fig .dimg>*{transition:none}}
.pv-fig .dimg.on .pv-lead{stroke:var(--accent);stroke-width:1.8;opacity:1}
.pv-fig .dimg.on .pv-dot{fill:var(--accent)}

/* ---------- realistic valve elevations ---------- */
.vv .vv-o{stroke:#2D4557;stroke-width:.8;stroke-linejoin:round}
:root[data-theme="dark"] .vv .vv-o{stroke:#0A1420}
.vv .vv-l{stroke:rgba(0,0,0,.35);stroke-width:.6}
.vv .vv-th{stroke:rgba(40,55,68,.55);stroke-width:.6}
.vv .vv-hl{fill:none;stroke:rgba(255,255,255,.55);stroke-width:1.2;stroke-linecap:round}
.vv .vv-arrow{fill:rgba(30,55,75,.28);stroke:rgba(255,255,255,.5);stroke-width:.6}
.vv .vv-hwb{stroke:#163E8F}
.vv .vv-hwf{stroke:#2F63C8}
.vv .vv-hw{stroke:#2F63C8;stroke-width:3}
.vv .vv-sp{stroke:#1F4FB3;stroke-width:2.2;stroke-linecap:round}
.vv .vv-mate{opacity:.55}
.vv .vv-shadow ellipse{fill:rgba(15,27,45,.12)}
:root[data-theme="dark"] .vv .vv-shadow ellipse{fill:rgba(0,0,0,.35)}
.vv .vv-ah{fill:var(--accent)}
.vv .vv-ext{stroke:var(--muted);stroke-width:.6}
.vv .vv-cap{fill:var(--muted);font-family:var(--f-body);font-size:10px}
.mp-stage .vv .dimg .t-dim{font-size:11px}
.mp-stage .vv .dimg.on .t-dim{font-size:12px}

/* ---------- flange half-section view ---------- */
.pv-fig{--fs-bg:#FAFBFD}
:root[data-theme="dark"] .pv-fig{--fs-bg:#0B1424}
.fs .fs-cut{fill:url(#fsHatch);stroke:#2D4557;stroke-width:1.1;stroke-linejoin:round}
.fs .fs-hbg{fill:#DCE5EC}
.fs .fs-hl{stroke:#6E8696;stroke-width:1}
.fs .fs-out{fill:url(#fsMetal);stroke:#2D4557;stroke-width:1.1;stroke-linejoin:round}
.fs .fs-pipe{fill:url(#fsPipe);stroke:#5B6F7E;stroke-width:.9}
.fs .fs-pipein{fill:var(--fs-bg);stroke:#5B6F7E;stroke-width:.6;stroke-dasharray:4 3;opacity:.9}
.fs .fs-hid{stroke:#5B6F7E;stroke-width:.8;stroke-dasharray:4 3}
.fs .fs-weld{fill:#1F2F3B;opacity:.85}
.fs .fs-brk{fill:none;stroke:#5B6F7E;stroke-width:1}
.fs .fs-cl{stroke:var(--muted);opacity:.7}
:root[data-theme="dark"] .fs .fs-cut,:root[data-theme="dark"] .fs .fs-out{stroke:#9DB4C6}
.fv-views{position:absolute;top:8px;left:8px;z-index:2}
.fv-views button{min-height:26px;padding:3px 10px;font-size:12.5px}
.pv-fig .fs ~ .pv-chips,.pv-fig svg ~ .pv-chips{margin-top:4px}
.pv-fig>.pv-svg{margin-top:28px}
#fvT button{padding:4px 10px}

/* spiral wound gasket section */
.gk .gk-cr{fill:#7D8893;stroke:#3E4852;stroke-width:.9}
.gk .gk-ir{fill:#CCD4DB;stroke:#4F5B66;stroke-width:.9}
.gk .gk-ir.gk-opt{fill:none;stroke-dasharray:4 3;opacity:.8}
.gk .gk-fill{fill:#3F454C;stroke:#2A3036;stroke-width:.9}
.gk .gk-chev{fill:none;stroke:#D7DDE3;stroke-width:1.1}
:root[data-theme="dark"] .gk .gk-ir{fill:#5B6775}
.fs .fs-thd{fill:none;stroke:#1F2F3B;stroke-width:1.1}
:root[data-theme="dark"] .fs .fs-thd{stroke:#C8D4DE}