/* Massing Sample Library — the site's whole stylesheet.
   Drawing-office palette: paper, ink, one accent. The sheets are the loudest thing on any page,
   so everything around them stays quiet. */
:root{
  --bg:#f6f6f4; --panel:#fff; --ink:#14171a; --dim:#5b6470; --faint:#8d97a4;
  --line:#dcdfe4; --accent:#1f5f4f; --accent-soft:#e8f1ee; --warn:#8a5a12; --warn-soft:#fbf3e3;
  --radius:3px; --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0d0f12; --panel:#14171b; --ink:#e9ecef; --dim:#a3adba; --faint:#78828f;
    --line:#252a31; --accent:#5fd0ae; --accent-soft:#10241f; --warn:#e0b25f; --warn-soft:#241d10;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased}
a{color:inherit}
code{font-family:var(--mono);font-size:.88em;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);padding:.08em .34em}
pre{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;overflow:auto}
pre code{border:0;background:0;padding:0;font-size:12.5px;line-height:1.7}
h1,h2,h3,h4{line-height:1.22;letter-spacing:-.015em;margin:0}
h1{font-size:clamp(30px,4.6vw,46px);font-weight:680}
h2{font-size:clamp(19px,2.3vw,23px);font-weight:660}
h3{font-size:17px;font-weight:640}
h4{font-size:14px;font-weight:660;margin:22px 0 8px;letter-spacing:.01em}

/* header */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:11px clamp(16px,4vw,40px);background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand .mark{width:19px;height:19px;border:1.5px solid var(--ink);position:relative;flex:none}
.brand .mark::before,.brand .mark::after{content:"";position:absolute;background:var(--ink)}
.brand .mark::before{left:0;right:0;top:50%;height:1px}
.brand .mark::after{top:0;bottom:0;left:50%;width:1px}
.brand b{display:block;font-size:14px;font-weight:660;letter-spacing:-.01em}
.brand em{display:block;font-size:10.5px;font-style:normal;color:var(--faint);
  text-transform:uppercase;letter-spacing:.13em}
.top nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.top nav a{font-size:13px;text-decoration:none;color:var(--dim);padding:6px 11px;
  border-radius:var(--radius)}
.top nav a:hover{color:var(--ink);background:var(--panel)}
.top nav a.on{color:var(--ink);background:var(--panel);border:1px solid var(--line)}
.top nav a.ghost{color:var(--faint)}

/* layout */
.wrap{max-width:1120px;margin:0 auto;padding:44px clamp(16px,4vw,40px)}
.hero{border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,color-mix(in srgb,var(--accent-soft) 60%,transparent),transparent)}
.hero .wrap{padding-top:62px;padding-bottom:52px}
.eyebrow{margin:0 0 14px;font-size:11.5px;text-transform:uppercase;letter-spacing:.15em;
  color:var(--faint);font-weight:640}
.eyebrow a{color:var(--dim);text-decoration:none}
.eyebrow a:hover{color:var(--ink)}
h1 em{font-style:normal;color:var(--accent)}
.lede{font-size:clamp(15px,1.7vw,18px);color:var(--dim);max-width:72ch;margin:18px 0 0}
.head{padding-bottom:12px}
.rule{padding-bottom:9px;border-bottom:1px solid var(--line);margin-bottom:20px}
.sub{margin:34px 0 16px;color:var(--dim);font-size:14px;text-transform:uppercase;
  letter-spacing:.11em}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.three h4{margin-top:0}
.three p{margin:0;color:var(--dim);font-size:14px}
.band{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  max-width:none}
.band>*{max-width:1120px;margin-left:auto;margin-right:auto}
@media(max-width:820px){.cols,.three{grid-template-columns:1fr}}

/* stats */
.counts{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.fab{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:11px 15px;min-width:132px;flex:1 1 auto}
.stat .k{display:block;font-size:10.5px;text-transform:uppercase;letter-spacing:.12em;
  color:var(--faint);font-weight:640}
.stat .v{display:block;font-size:20px;font-weight:660;letter-spacing:-.02em;margin-top:3px;
  font-variant-numeric:tabular-nums}
.stat .note{display:block;font-size:11.5px;color:var(--dim);margin-top:1px}

/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.grid.two{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}
.card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);text-decoration:none;overflow:hidden;transition:border-color .14s,
  transform .14s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
/* The thumbnail shows the DRAWING, not the sheet. An ARCH-D sheet scaled to 300 px is a grey
   rectangle with an illegible title block down one side — it reads as "a document" when the whole
   point is for it to read as "a building". The transform crops the title block out (it occupies the
   right ~21% of the sheet) and zooms the plan up to fill the card. */
.card .thumb{aspect-ratio:3/2;background:#fff;border-bottom:1px solid var(--line);overflow:hidden;
  display:flex;align-items:center;justify-content:center}
/* scale s about origin o shows fractions [o - o/s, o + (1-o)/s] of the sheet. The title block
   starts at 724/914 = 79.2%, so s=1.55 about 38% shows 13.5%..78% — the drawing, and none of the
   block beside it. */
.card .thumb img{width:100%;height:100%;object-fit:contain;
  transform:scale(1.55);transform-origin:38% 50%}
.card .noplan{width:100%;height:100%;background:
  repeating-linear-gradient(45deg,var(--bg),var(--bg) 9px,var(--panel) 9px,var(--panel) 18px)}
/* The meta block grows and the figures sit at its foot, so a two-line subtitle in one card does not
   push its numbers out of line with the rest of the row. */
.card .meta{padding:15px 17px 17px;display:flex;flex-direction:column;flex:1}
.card .meta dl{margin-top:auto}
.card.slim .meta{padding:17px}
.tag{display:inline-block;font-size:10.5px;text-transform:uppercase;letter-spacing:.12em;
  font-weight:640;color:var(--accent);background:var(--accent-soft);border-radius:var(--radius);
  padding:2px 7px;margin-bottom:9px}
.tag.alt{color:var(--warn);background:var(--warn-soft)}
.card h3{margin:0 0 5px}
.card p{margin:0;font-size:13px;color:var(--dim);line-height:1.5}
.card dl{display:flex;flex-wrap:wrap;gap:14px;margin:13px 0 0;padding-top:11px;
  border-top:1px solid var(--line)}
.card dl div{min-width:0}
.card dt{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--faint);
  font-weight:640}
.card dd{margin:1px 0 0;font-size:13.5px;font-weight:600;font-variant-numeric:tabular-nums}

/* sheets */
.sheets{display:grid;gap:22px}
.sheet{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden}
.sheet a{display:block;background:#fff;line-height:0}
.sheet img{width:100%;height:auto;display:block}
.sheet figcaption{display:flex;align-items:baseline;gap:9px;padding:10px 14px;font-size:13px;
  color:var(--dim);border-top:1px solid var(--line)}
.sheet figcaption b{color:var(--ink);font-family:var(--mono);font-size:12.5px}
.sheet figcaption span{margin-left:auto;font-size:11.5px;color:var(--faint)}

/* tables */
table.data{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:4px}
table.data.wide{font-size:13px}
table.data th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;
  color:var(--faint);font-weight:640;padding:8px 10px;border-bottom:1px solid var(--line)}
table.data td{padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
table.data td.n,table.data th.n{text-align:right;font-variant-numeric:tabular-nums;
  white-space:nowrap}
table.data tr:last-child td{border-bottom:0}
table.data tr.tot td{font-weight:660;border-top:1px solid var(--line)}
table.data a{color:var(--accent);text-decoration:none}
table.data a:hover{text-decoration:underline}
section:not(.band) table.data{background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius)}

/* bars */
.bars{display:grid;gap:8px;margin-top:6px}
.bar{display:grid;grid-template-columns:170px 1fr 48px;align-items:center;gap:12px;font-size:13px}
.bar .lab{color:var(--dim)}
.bar .track{height:7px;background:var(--line);border-radius:99px;overflow:hidden}
.bar .track i{display:block;height:100%;background:var(--accent);border-radius:99px}
.bar .pct{text-align:right;font-variant-numeric:tabular-nums;font-weight:640}
@media(max-width:620px){.bar{grid-template-columns:1fr 60px}.bar .track{grid-column:1/-1;order:3}}

/* misc */
.callout{border-left:2px solid var(--warn);background:var(--warn-soft);padding:13px 17px;
  border-radius:0 var(--radius) var(--radius) 0;font-size:14px;margin:20px 0 0}
.muted{color:var(--dim);font-size:14px}
.small{font-size:12.5px}
.ticks{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:7px}
.ticks li{position:relative;padding-left:22px;font-size:14.5px;color:var(--dim)}
/* A tick, not a chevron: the arms have to be unequal. A square rotated 45 degrees reads as "v". */
.ticks li::before{content:"";position:absolute;left:5px;top:.42em;width:5px;height:9px;
  border:1.6px solid var(--accent);border-top:0;border-left:0;transform:rotate(40deg)}
.ticks li b{color:var(--ink)}
.files{list-style:none;margin:0;padding:0;display:grid;gap:0;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius)}
.files li{display:flex;gap:14px;align-items:baseline;padding:10px 15px;
  border-bottom:1px solid var(--line);flex-wrap:wrap}
.files li:last-child{border-bottom:0}
.files a{text-decoration:none;color:var(--accent)}
.files a:hover code{border-color:var(--accent)}
.files span{color:var(--dim);font-size:13px;margin-left:auto;text-align:right}
.dlbar{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0 0}
.btn{display:inline-block;text-decoration:none;font-size:13.5px;font-weight:600;padding:9px 15px;
  border-radius:var(--radius);background:var(--accent);color:#fff;border:1px solid var(--accent)}
.btn code{background:rgba(255,255,255,.14);border-color:transparent;color:inherit}
.btn.ghost{background:var(--panel);color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}

footer{border-top:1px solid var(--line);background:var(--panel);
  padding:32px clamp(16px,4vw,40px) 44px}
footer>div,footer>p{max-width:1120px;margin-left:auto;margin-right:auto}
footer p{margin:0 0 9px;font-size:13.5px;color:var(--dim);max-width:86ch}
footer a{color:var(--accent)}