@font-face{font-family:"Archivo";src:url(/assets/fonts/archivo.woff2) format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}

:root{
  --bg:#e8e9e8;
  --sheet:#f6f6f4;
  --ink:#16191d;
  --muted:#545b63;
  --line:#c3c7c9;
  --crane:#f2b705;
  --crane-deep:#a97f00;
  --night:#16191d;
  --wrap:1200px;
  --gut:clamp(16px,4vw,40px);
  color-scheme:light;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.6 "Archivo",system-ui,sans-serif;font-stretch:100%}
img{display:block;max-width:100%;height:auto}
a{color:var(--ink);text-decoration-color:var(--crane);text-decoration-thickness:3px;text-underline-offset:.18em}
a:hover{color:var(--crane-deep)}
:focus-visible{outline:3px solid var(--crane);outline-offset:3px}
h1,h2,h3{font-weight:800;font-stretch:125%;line-height:1.02;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,6.4vw,5.2rem)}
h2{font-size:clamp(1.6rem,3.2vw,2.5rem)}
h3{font-size:1.2rem;font-stretch:112%}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
main>.wrap{padding-bottom:3.5rem}
.skip{position:absolute;left:-999px;top:0;background:var(--crane);color:var(--ink);padding:.5rem 1rem}
.skip:focus{left:1rem;z-index:10}

.site-header{position:relative;z-index:20;background:var(--sheet);border-bottom:3px solid var(--ink)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:4.25rem;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;text-decoration:none}
.brand img{height:56px;width:auto}
@media (max-width:640px){.brand img{height:44px}}
.nav{list-style:none;margin:0;padding:0;display:flex;gap:1.6rem;flex-wrap:wrap}
.nav a{text-decoration:none;font-weight:600;padding:.3rem 0;border-bottom:3px solid transparent}
.nav a[aria-current]{border-bottom-color:var(--crane)}

.btn,.nav-toggle{display:inline-block;font:700 1rem/1 "Archivo",sans-serif;font-stretch:110%;color:var(--ink);background:var(--sheet);
  border:3px solid var(--ink);border-left-width:8px;border-right-width:8px;border-radius:2px;padding:.85rem 1.3rem;
  text-decoration:none;cursor:pointer;transition:background-color .15s,color .15s,transform .15s}
.btn:hover,.nav-toggle:hover{background:var(--crane);color:var(--ink);transform:translateY(-1px)}
.btn-solid{background:var(--crane)}
.btn-solid:hover{background:var(--ink);color:var(--crane)}
.nav-toggle{display:none}
.burger,.burger::before,.burger::after{display:block;width:24px;height:3px;background:currentColor;transition:transform .2s,background-color .2s}
.burger{position:relative}
.burger::before,.burger::after{content:"";position:absolute;left:0}
.burger::before{top:-8px}
.burger::after{top:8px}
.nav-toggle[aria-expanded="true"] .burger{background:transparent}
.nav-toggle[aria-expanded="true"] .burger::before{transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .burger::after{transform:translateY(-8px) rotate(-45deg)}

.lead{font-size:clamp(1.15rem,2vw,1.4rem);color:var(--muted)}

.hero{position:relative;isolation:isolate;overflow:hidden;min-height:min(86vh,760px);display:flex;align-items:flex-end;padding:6rem 0 2.5rem;color:#fff}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,rgba(14,16,19,.92) 0%,rgba(14,16,19,.55) 45%,rgba(14,16,19,.1) 80%)}
.hero h1{color:#fff;max-width:none}
.hero .lead{color:#e3e6e8}
.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin:1.6rem 0 0}
.hero .btn{background:transparent;color:#fff;border-color:#fff}
.hero .btn-solid{background:var(--crane);color:var(--ink);border-color:var(--crane)}
.hero .btn:hover{background:var(--crane);color:var(--ink);border-color:var(--crane)}
.hero-credit{margin:1.4rem 0 0;font-size:.8rem;color:#c8cdd1}

.band{padding:clamp(3rem,7vw,5rem) 0}
.band.dark{background:var(--night);color:#e6e8ea}
.band.dark h2{color:#fff}
.band.dark a:not(.btn){color:#fff}
.intro{font-size:1.15rem;color:var(--muted)}

.tower-steps{list-style:none;margin:2rem 0 0;padding:0;display:flex;flex-direction:column-reverse;border-left:10px solid var(--ink);border-right:10px solid var(--ink)}
.tower-steps li{display:grid;grid-template-columns:5.5rem minmax(0,16rem) minmax(0,1fr);gap:.5rem 1.5rem;align-items:baseline;padding:1.1rem 1.4rem;background:var(--sheet);border-bottom:4px solid var(--ink)}
.tower-steps li:last-child{border-top:4px solid var(--ink)}
.tower-steps .floor{font-weight:800;font-stretch:125%;font-size:1.3rem;color:var(--crane-deep)}
.tower-steps h3{margin:0}
.tower-steps p{margin:0;color:var(--muted)}

.glossary-band{background:var(--sheet);border-top:3px solid var(--ink);border-bottom:3px solid var(--ink);background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:40px 40px}
.glossary{margin:2rem 0 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:3px solid var(--ink);background:var(--sheet)}
.glossary div{padding:1.2rem 1.3rem;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.glossary div:nth-child(4n){border-right:0}
.glossary div:nth-last-child(-n+4){border-bottom:0}
.glossary dt{font-weight:800;font-stretch:118%;font-size:1.1rem;margin-bottom:.4rem;padding-bottom:.4rem;border-bottom:3px solid var(--crane);display:inline-block}
.glossary dd{margin:0;color:var(--muted);font-size:.97rem}
.faq{margin-top:1.8rem;border-top:3px solid var(--ink)}
.faq details{border-bottom:2px solid var(--ink)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.1rem 0;font-weight:800;font-stretch:112%;font-size:1.15rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:1.4rem;height:1.4rem;background:linear-gradient(var(--ink),var(--ink)) 50%/100% 3px no-repeat,linear-gradient(var(--ink),var(--ink)) 50%/3px 100% no-repeat}
.faq details[open] summary::after{background:linear-gradient(var(--crane-deep),var(--crane-deep)) 50%/100% 3px no-repeat}
.faq p{margin:0 0 1.2rem;color:var(--muted);max-width:none}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:2.5rem;align-items:center}
.figure{margin:0 0 2.5rem}
.figure img{width:100%;border:3px solid var(--ink)}
.figure.wide img{max-height:560px;object-fit:cover}
.figure.feature{margin:0}
.figure.feature img{border-color:#fff}
figcaption{font-size:.85rem;color:var(--muted);margin-top:.6rem}
.band.dark figcaption{color:#aab1b8}
figcaption a{color:inherit}

.cards{list-style:none;margin:2rem 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}
.cards.n2,.cards.n4{grid-template-columns:repeat(2,minmax(0,1fr))}
.card a{display:flex;flex-direction:column;height:100%;text-decoration:none;background:var(--sheet);border:3px solid var(--ink)}
.card img{aspect-ratio:3/2;object-fit:cover;width:100%;border-bottom:3px solid var(--ink)}
.card-kicker{padding:1rem 1.2rem 0;font-weight:700;color:var(--crane-deep);font-size:.92rem}
.card-title{padding:.2rem 1.2rem 0;font-weight:800;font-stretch:118%;font-size:1.35rem;line-height:1.1}
.card-text{padding:.6rem 1.2rem 1.2rem;color:var(--muted);font-size:.98rem}
.card a:hover .card-title{text-decoration:underline;text-decoration-color:var(--crane);text-decoration-thickness:3px}

.page-head{padding:clamp(2rem,5vw,3.5rem) 0 2rem}
.crumbs{list-style:none;margin:0 0 1.5rem;padding:0;display:flex;flex-wrap:wrap;gap:.25rem .7rem;color:var(--muted);font-size:.95rem}
.crumbs li+li::before{content:"";display:inline-block;width:.6rem;height:3px;background:var(--crane);margin-right:.7rem;vertical-align:middle}
.crumbs a{color:var(--muted)}
.kicker{font-weight:700;color:var(--crane-deep);margin-bottom:.5rem}

.article{display:grid;gap:0}
.article .text{padding:1.6rem 0;border-top:3px solid var(--ink)}
.article .text:first-child{border-top:0;padding-top:0}
.article ul{padding-left:1.3rem}
.article li{margin-bottom:.4rem}
.steps{list-style:none;counter-reset:s;margin:1rem 0 0;padding:0;display:grid;gap:.8rem}
.steps li{counter-increment:s;display:grid;grid-template-columns:3.2rem minmax(0,1fr);gap:0 1rem;padding:1rem 1.2rem;background:var(--sheet);border-left:8px solid var(--crane)}
.steps li::before{content:counter(s,decimal-leading-zero);grid-row:span 2;font-weight:800;font-stretch:125%;font-size:1.4rem;color:var(--crane-deep)}
.steps h3{margin:0 0 .2rem}
.steps p{margin:0;color:var(--muted)}
.facts div{display:grid;grid-template-columns:minmax(8rem,14rem) minmax(0,1fr);gap:1rem;padding:.6rem 0;border-bottom:1px solid var(--line)}
.facts dt{color:var(--muted)}
.facts dd{margin:0}

.plate{margin:0 0 2.5rem;padding:1.4rem;background:var(--sheet);border:3px solid var(--ink);box-shadow:inset 0 0 0 6px var(--sheet),inset 0 0 0 7px var(--line)}
.plate figcaption{margin-top:1rem;padding-top:.7rem;border-top:2px solid var(--ink);color:var(--ink);font-weight:600}
.drawing{display:block;width:100%;max-height:460px}
.drawing.chart{max-height:300px}
.drawing text{font:600 12px "Archivo",sans-serif;fill:var(--ink)}
.drawing .note{fill:var(--muted);font-weight:500}
.drawing .ground{fill:#d3d6d4}
.drawing .slab,.drawing .slabs line{stroke:var(--ink);stroke-width:3}
.drawing .slab.future{stroke:var(--line);stroke-dasharray:6 6}
.drawing .core{fill:#9aa0a5}
.drawing .form{fill:var(--crane)}
.drawing .crane{stroke:var(--crane-deep);stroke-width:4}
.drawing .hook{stroke:var(--ink);stroke-width:1.5}
.drawing .load{fill:var(--ink)}
.drawing .dim{stroke:var(--crane-deep);stroke-width:2}
.drawing .grid{stroke:var(--line);stroke-width:1}
.drawing .bar{fill:var(--crane)}
.drawing .vol{fill:#cfd3d6;stroke:var(--ink);stroke-width:2}
.drawing .vol.soft{fill:#ece4cf}
.drawing .vol.under{fill:#b9bec2}
.drawing .green{stroke:#5f8f3a;stroke-width:6}
.drawing .roof{fill:none;stroke:var(--crane-deep);stroke-width:6}

.site-footer{background:var(--night);color:#b5bcc2;padding:3rem 0 2rem;font-size:.95rem;border-top:8px solid var(--crane)}
.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:2rem;margin-bottom:2rem}
.footer-grid h2{font-size:1.15rem;color:#fff}
.footer-grid ul{list-style:none;margin:0;padding:0}
.footer-grid li{margin-bottom:.4rem}
.site-footer a{color:#e6e9eb}
.site-footer .brand{margin-bottom:.8rem}
.site-footer .brand img{height:52px}
.legal{border-top:1px solid #33393f;padding-top:1rem;margin:0 0 .5rem}

@media (max-width:900px){
  .glossary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .glossary div,.glossary div:nth-child(4n){border-right:2px solid var(--ink);border-bottom:2px solid var(--ink)}
  .glossary div:nth-child(2n){border-right:0}
  .glossary div:nth-last-child(-n+2){border-bottom:0}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:minmax(0,1fr)}
  .tower-steps li{grid-template-columns:4rem minmax(0,1fr)}
  .tower-steps p{grid-column:2}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-grid>div:first-child{grid-column:1/-1}
}
@media (max-width:640px){
  .js .nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:3.4rem;height:2.9rem;padding:0}
  .js .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;gap:0;padding:.5rem var(--gut) 1rem;background:var(--sheet);border-bottom:3px solid var(--ink)}
  .js .nav.open{display:flex}
  .js .nav a{display:block;padding:.8rem 0;border-bottom:1px solid var(--line)}
  .site-header nav{width:100%}
  .js .site-header nav{display:contents}
  .js .nav-toggle{margin-left:auto}
  .cards,.cards.n2,.cards.n4{grid-template-columns:minmax(0,1fr)}
  .glossary{grid-template-columns:minmax(0,1fr)}
  .glossary div,.glossary div:nth-child(2n){border-right:0;border-bottom:2px solid var(--ink)}
  .glossary div:last-child{border-bottom:0}
  .tower-steps{border-left-width:6px;border-right-width:6px}
  .tower-steps li{padding:1rem}
  .facts div{grid-template-columns:minmax(0,1fr);gap:.1rem}
  .footer-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}