:root{
  --paper:#F0C020; --ink:#16170D; --mark:#8C1D18; --rule:#C9A114;
  --muted:#6A5200; --panel:#F7DE86; --dim:#3B2F00; --band:#EFCF6A;
  --cond:"Helvetica Neue Condensed","Helvetica Neue",Helvetica,"Arial Narrow",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--cond);
  font-size:17px;line-height:1.55;font-stretch:semi-condensed;font-variant-numeric:tabular-nums}
a{color:var(--mark);text-underline-offset:2px;text-decoration-thickness:1.5px}
a:hover{background:var(--panel)}
.mono{font-family:var(--mono);font-size:.8em;letter-spacing:.04em;text-transform:uppercase}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:var(--ink);color:var(--paper);padding:8px 12px;z-index:9}
/* tag strip nav: six punched tags on a wire */
.tagstrip{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;padding:10px 20px;
  background:var(--ink);color:var(--paper)}
.jobno{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;border:1px solid var(--paper);
  padding:2px 7px;color:var(--paper)}
.brand{font-family:var(--cond);font-weight:700;font-size:1.06rem;letter-spacing:.06em;
  text-transform:uppercase;color:var(--paper);text-decoration:none}
.brand:hover{background:transparent;color:var(--mark);background:var(--paper)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-left:auto}
.tag{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--paper);text-decoration:none;border:1px solid var(--paper);
  padding:3px 9px 3px 16px;position:relative;background:transparent}
.tag::before{content:"";position:absolute;left:6px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--paper)}
.tag:hover{background:var(--paper);color:var(--ink)}
.tag:hover::before{background:var(--ink)}
/* hazard stripe divider */
.hazard{height:12px;background:repeating-linear-gradient(45deg,var(--ink) 0 7px,var(--paper) 7px 14px);
  border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
main{display:block}
.sheet-job{display:block;max-width:1180px;margin:14px auto 0;padding:0 20px;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.crumb{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);padding:10px 20px 0;max-width:1180px;margin:0 auto}
.crumb a{color:var(--muted)}
.crumb-sep{color:var(--dim)}
.sheet{max-width:1180px;margin:0 auto;padding:6px 20px 8px}
.col{max-width:720px;margin:0 auto;padding:0}
h1{font-family:var(--cond);font-weight:700;font-size:2.15rem;line-height:1.1;letter-spacing:-.015em;
  margin:.35rem 0 1rem;text-transform:none}
h2{font-family:var(--mono);font-weight:700;font-size:.76rem;letter-spacing:.18em;text-transform:uppercase;
  margin:2.1rem 0 .6rem;padding-bottom:.3rem;border-bottom:2px solid var(--ink)}
p{margin:0 0 1rem}
ul,ol{margin:0 0 1.1rem;padding-left:1.4rem}
li{margin:0 0 .45rem}
li::marker{font-family:var(--mono);font-size:.78em;color:var(--mark);font-weight:700}
/* verdict */
.verdict{border-left:8px solid var(--ink);background:var(--panel);padding:.85rem 1rem;margin:0 0 1.1rem;
  font-size:1.06rem;line-height:1.45;font-weight:500}
/* stamp */
.stamp{display:flex;flex-wrap:wrap;gap:6px 18px;border:1px solid var(--ink);padding:7px 11px;
  margin:0 0 1rem;font-size:.8rem;font-family:var(--mono);letter-spacing:.03em;background:transparent}
.stamp-cell{color:var(--muted)}
.stamp-rots{color:var(--mark);font-weight:700}
/* last-checked stamp: the evidence strip */
.checkstamp{border:2px solid var(--mark);background:transparent;padding:10px 12px;margin:0 0 1.5rem;
  display:grid;grid-template-columns:minmax(0,150px) minmax(0,1fr);gap:0 18px;align-items:start}
.cs-head{font-family:var(--mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mark);margin:0 0 .1rem;grid-column:1}
.cs-date{font-family:var(--mono);font-size:1.35rem;font-weight:700;margin:0;grid-column:1;
  letter-spacing:.02em}
.cs-body{margin:0;grid-column:2;grid-row:1 / span 2;display:grid;
  grid-template-columns:64px minmax(0,1fr);gap:2px 10px;font-size:.9rem}
.cs-body dt{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mark);padding-top:.2rem}
.cs-body dd{margin:0;color:var(--ink)}
/* figures: the drawing comes first */
.drawings{display:grid;gap:18px;margin:0 0 1.8rem}
.fig{margin:0;border:2px solid var(--ink);background:var(--panel)}
.fig img{display:block;width:100%;height:auto}
.fig figcaption{font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;color:var(--ink);
  padding:7px 10px;border-top:2px solid var(--ink);background:var(--band)}
/* worked example: the arithmetic, between the drawings and the method column */
.formula{border:2px solid var(--ink);border-top:8px solid var(--mark);padding:11px 13px;
  margin:0 0 1.7rem;background:var(--panel)}
.formula-tag{font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--mark);font-weight:700;margin:0 0 .45rem}
.formula-expr{font-family:var(--mono);font-size:.9rem;line-height:1.45;margin:0 0 .45rem;color:var(--ink)}
.formula-units,.formula-worked{font-size:.92rem;margin:0 0 .3rem;color:var(--ink)}
.formula-units .mono,.formula-worked .mono{margin-right:.45rem;color:var(--mark)}
/* tables */
.tablewrap{overflow-x:auto;margin:0 0 1.4rem;border:2px solid var(--ink);background:transparent}
table{border-collapse:collapse;width:100%;font-size:.88rem}
th,td{text-align:left;padding:7px 9px;border-bottom:1px solid var(--dim);vertical-align:top}
th{background:var(--ink);color:var(--paper);font-family:var(--mono);font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;font-size:.68rem}
td{font-family:var(--mono);font-size:.8rem;letter-spacing:.01em}
td:first-child{font-family:var(--cond);font-size:.92rem;letter-spacing:0}
tr:last-child td{border-bottom:0}
.note{border-left:4px solid var(--mark);padding:.15rem 0 .15rem .9rem;color:var(--dim);font-style:italic}
/* xlink */
.xlink{border-top:2px solid var(--ink);margin-top:2rem;padding-top:.9rem}
.xlink-h{font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;
  border:0;margin:0 0 .5rem;padding:0;color:var(--muted)}
.xlink ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:.4rem .8rem}
.xlink li{margin:0}
.xlink a{font-family:var(--mono);font-size:.76rem;letter-spacing:.04em;text-transform:uppercase;
  text-decoration:none;border:1px solid var(--ink);padding:3px 8px;display:inline-block}
.xlink a:hover{background:var(--ink);color:var(--paper)}
/* source log: an inspection tag rack */
.sources{margin-top:2.2rem;padding:0;border-top:8px solid var(--mark);border-bottom:2px solid var(--ink)}
.sources-h{font-family:var(--mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mark);border:0;margin:0;padding:.7rem 0 .5rem}
.sources-list{list-style:none;padding:0;margin:0;counter-reset:s}
.sources-list li{display:grid;grid-template-columns:1.9rem minmax(0,1fr);gap:0 .8rem;
  padding:.6rem 0;border-bottom:1px dotted var(--dim);align-items:baseline}
.sources-list li:last-child{border-bottom:0}
.src-idx{font-family:var(--mono);font-size:.72rem;font-weight:700;color:var(--paper);
  background:var(--mark);text-align:center;padding:.15rem 0;line-height:1.25}
.src-link{font-size:.9rem;color:var(--ink);text-decoration:underline;
  text-decoration-color:var(--mark);text-underline-offset:3px;text-decoration-thickness:2px}
.src-sup{grid-column:2;font-size:.82rem;color:var(--dim);margin-top:.15rem}
.sources-note{font-family:var(--mono);font-size:.68rem;color:var(--muted);margin:.55rem 0 0;
  letter-spacing:.03em}
/* close note */
.close-note{border:2px dashed var(--mark);padding:.8rem 1rem;margin:1.6rem 0 1.2rem;font-size:.98rem}
.close-tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--paper);background:var(--mark);padding:2px 7px;margin-right:.6rem;font-weight:700}
/* sign-off */
.signoff{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;
  border:2px solid var(--ink);padding:10px;margin:0 0 2.2rem;background:transparent}
.so-cell{display:flex;flex-direction:column;gap:14px}
.so-lab{font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted)}
.so-line{display:block;border-bottom:1px solid var(--ink);height:1px}
/* homepage: waterfall */
.lead{max-width:1180px;margin:0 auto;padding:8px 20px 0;display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:24px;align-items:start}
.lead-text h1{font-size:1.85rem;margin-top:0}
.lead-figs{display:grid;gap:16px}
.waterfall{max-width:1180px;margin:0 auto;padding:26px 20px 0}
.wf-head{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;
  border-bottom:2px solid var(--ink);margin:0 0 .6rem;padding-bottom:.3rem}
.wf{list-style:none;padding:0;margin:0;border-top:1px solid var(--dim)}
.wf li{margin:0}
.wf-item{display:grid;grid-template-columns:96px 190px minmax(0,1fr) 170px;gap:12px;
  align-items:baseline;padding:7px 8px;border-bottom:1px solid var(--dim);
  text-decoration:none;color:var(--ink)}
.wf-item:hover{background:var(--panel)}
.wf-date{font-family:var(--mono);font-size:.74rem;color:var(--muted);letter-spacing:.02em}
.wf-geom{font-family:var(--mono);font-size:.8rem;font-weight:700;color:var(--mark)}
.wf-name{font-size:1rem;font-weight:600}
.wf-cab{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin-left:.55rem}
.wf-rots{font-family:var(--mono);font-size:.6rem;letter-spacing:.12em;text-transform:uppercase;
  background:var(--mark);color:var(--paper);padding:1px 5px;margin-left:.45rem}
.wf-tag{font-family:var(--mono);font-size:.68rem;color:var(--muted);text-align:right}
.lead-stamp{max-width:1180px;margin:22px auto 0;padding:0 20px}
.lead-stamp .checkstamp{max-width:1180px}
.home-close{max-width:720px;margin:0 auto;padding:26px 20px 0}
/* footer */
.foot{max-width:1180px;margin:44px auto 0;padding:20px;border-top:8px solid var(--ink);
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.foot-h{font-family:var(--mono);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;
  border:0;margin:0 0 .55rem;padding:0;color:var(--mark)}
.foot ul{list-style:none;padding:0;margin:0;font-size:.86rem}
.foot li{margin:0 0 .3rem}
.foot-note{grid-column:1 / -1;font-size:.82rem;color:var(--dim);margin:.8rem 0 0;
  border-top:1px solid var(--dim);padding-top:.7rem}
@media (max-width:960px){
  .lead{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr 1fr}
  .signoff{grid-template-columns:1fr 1fr}
  .checkstamp{grid-template-columns:1fr}
  .cs-body{grid-column:1;grid-row:auto;margin-top:.5rem}
  .wf-item{grid-template-columns:88px minmax(0,1fr);gap:4px 10px}
  .wf-tag{text-align:left;grid-column:2}
  h1{font-size:1.8rem}
}
@media print{
  .tagstrip,.hazard,.foot,.crumb,.xlink,.sources,.skip,.signoff,.sheet-job{display:none}
  .sheet,.col{max-width:none;padding:0}
  .verdict{border-left:0;background:none;padding:0;font-weight:700}
  a{color:#000;text-decoration:none}
  .fig{border:1px solid #666}
  .checkstamp{border-color:#000}
}