/* ============================================================
   CROWNBURG DEVELOPMENT — The Quiet Threshold (multi-page)
   ============================================================ */
:root{
  --royal:#002366; --granite:#444444; --limestone:#EEEAE1; --plaster:#D8D0C2;
  --ink:#111416; --bronze:#8C795C; --paper:#F7F5F0; --pearl:#FAFAFA;
  --serif:'EB Garamond', Georgia, serif;
  --display:'Playfair Display', Georgia, serif;
  --sans:'Inter', system-ui, sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1); --measure:36rem;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;scroll-behavior:smooth}
body{font-family:var(--serif);font-weight:400;color:var(--granite);background:var(--ink);line-height:1.7;font-variant-numeric:lining-nums;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.02;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

h1,h2,h3{font-family:var(--serif);font-weight:400;color:var(--royal);line-height:1.06;letter-spacing:0}
.page-title{font-family:var(--display);font-weight:400;font-size:clamp(2.6rem,5vw,4.4rem);line-height:1.08;margin-bottom:1.8rem}
.sub-title{font-family:var(--display);font-weight:400;font-size:clamp(1.9rem,2.8vw,2.6rem);line-height:1.12;margin-bottom:1.4rem}
.eyebrow{font-family:var(--sans);font-weight:400;font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--bronze);margin-bottom:1.8rem}
p{max-width:var(--measure);margin-bottom:1.3rem;font-size:1.35rem;line-height:1.64;color:var(--granite)}
p:last-child{margin-bottom:0}
.lede{font-size:clamp(1.33rem,1.7vw,1.55rem);line-height:1.58;font-weight:400}

header{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:1.5rem 5%;transition:background .6s var(--ease),padding .6s var(--ease)}
header.scrolled{background:rgba(17,20,22,.82);backdrop-filter:blur(14px);padding:1rem 5%}
.wordmark{font-family:var(--serif);font-size:1.2rem;letter-spacing:.24em;text-transform:uppercase;color:var(--limestone);text-decoration:none;white-space:nowrap;transition:color .6s var(--ease)}
.wm-short{display:none}
header.light-head:not(.scrolled) .wordmark{color:var(--ink)}
nav ul{list-style:none;display:flex;gap:2.8rem}
nav a{font-family:var(--sans);font-size:.72rem;font-weight:400;letter-spacing:.22em;text-transform:uppercase;color:rgba(238,234,225,.82);text-decoration:none;position:relative;padding-bottom:4px;transition:color .5s var(--ease)}
header.light-head:not(.scrolled) nav a{color:var(--granite)}
nav a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--bronze);transition:width .5s var(--ease)}
nav a:hover::after,nav a.active::after{width:100%}
nav a:hover,nav a.active{color:var(--bronze)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.nav-toggle span{display:block;width:26px;height:1.5px;background:var(--limestone);transition:all .4s var(--ease)}
header.light-head:not(.scrolled) .nav-toggle span{background:var(--ink)}

.movement{position:relative;min-height:100vh;display:flex;align-items:center;padding:10rem 5% 8rem;overflow:hidden;background:var(--ink)}
.movement .inner{width:100%;max-width:1360px;margin:0 auto;position:relative;z-index:3}
.col{max-width:44rem}
.col.right{margin-left:auto}

.bg{position:absolute;inset:0;z-index:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.8s var(--ease)}
.bg.in{opacity:1}
.scrim{position:absolute;inset:0;z-index:1}
.scrim-left{background:linear-gradient(90deg,rgba(15,17,19,.94) 0%,rgba(15,17,19,.88) 30%,rgba(15,17,19,.66) 52%,rgba(15,17,19,.32) 72%,rgba(15,17,19,.08) 100%)}
.scrim-right{background:linear-gradient(270deg,rgba(15,17,19,.94) 0%,rgba(15,17,19,.88) 30%,rgba(15,17,19,.66) 52%,rgba(15,17,19,.32) 72%,rgba(15,17,19,.08) 100%)}
.feather{position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(180deg,rgba(17,20,22,.78) 0%,rgba(17,20,22,.4) 1.4%,rgba(17,20,22,0) 4.4%,rgba(17,20,22,0) 95.6%,rgba(17,20,22,.4) 98.6%,rgba(17,20,22,.78) 100%)}

.dark-text{color:var(--limestone)}
.dark-text .page-title,.dark-text .sub-title{color:var(--limestone)}
.dark-text .lede{color:#dcd6c9}
.dark-text p{color:#cbc5b8}

.reveal{opacity:0;transform:translateY(28px);transition:opacity 1.2s var(--ease),transform 1.2s var(--ease)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.14s}.d2{transition-delay:.3s}.d3{transition-delay:.46s}.d4{transition-delay:.6s}

body.home{background:var(--limestone)}
.home-logo-view{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.home-logo-view .bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.home-logo-view .veil{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(238,234,225,.26) 0%,rgba(238,234,225,.16) 40%,rgba(238,234,225,.28) 100%)}
.home-logo-view .logo-wrap{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center}
.home-logo-view img{width:clamp(280px,34vw,460px);height:auto;opacity:0;transform:translateY(20px);animation:rise 1.6s var(--ease) .3s forwards}
.home-scrolldown{position:absolute;bottom:2.6rem;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:1rem;opacity:0;animation:fade 2s var(--ease) 1.4s forwards;z-index:2;width:90%;max-width:44rem;text-align:center}
.home-scrolldown .bar{width:1px;height:44px;background:linear-gradient(180deg,var(--bronze),transparent)}
.home-scrolldown .seal{font-family:var(--display);font-style:italic;font-weight:400;font-size:.82rem;letter-spacing:.02em;color:rgba(250,250,250,.92);text-shadow:0 1px 8px rgba(0,0,0,.45)}
.home-threshold{min-height:100vh;display:flex;align-items:center;background:var(--ink);position:relative;padding:8rem 5%;overflow:hidden}
.home-threshold .bg{background-position:center right}
.home-threshold .inner{max-width:1360px;margin:0 auto;width:100%;position:relative;z-index:3}
.home-threshold .col{max-width:48rem}
.ht-eyebrow{font-family:var(--display);font-weight:400;font-size:clamp(1.5rem,2.6vw,2.3rem);color:var(--bronze);line-height:1.2;margin-bottom:2.4rem;letter-spacing:.01em;max-width:24ch}
.ht-line{font-size:clamp(1.28rem,1.8vw,1.55rem);color:#dcd6c9;font-weight:400;line-height:1.6;max-width:40rem;margin-bottom:1.2rem}
.ht-line:last-child{margin-bottom:0}
@keyframes rise{to{opacity:1;transform:translateY(0)}}
@keyframes fade{to{opacity:1}}

.page-hero{position:relative;min-height:90vh;display:flex;align-items:flex-end;padding:0 5% 7rem;overflow:hidden}
.page-hero .scrim{background:linear-gradient(180deg,rgba(15,17,19,.25) 0%,rgba(15,17,19,.55) 55%,rgba(15,17,19,.85) 100%)}
.page-hero .inner{max-width:1360px;margin:0 auto;width:100%;position:relative;z-index:3}
.page-hero .col{max-width:48rem}

.continuum{padding:9rem 5%;background:var(--ink);color:var(--limestone)}
.continuum .inner{max-width:1360px;margin:0 auto}
.continuum .eyebrow{color:var(--bronze)}
.continuum .lede{color:#d0cabc;max-width:42rem;margin-bottom:3.5rem}
.arc{display:grid;grid-template-columns:repeat(6,1fr);gap:0;border-top:1px solid rgba(140,121,92,.4)}
.arc-step{padding:2rem 1.2rem 0;border-left:1px solid rgba(140,121,92,.22)}
.arc-step:first-child{border-left:0}
.arc-step .n{font-family:var(--serif);font-size:1.6rem;color:var(--limestone);margin-bottom:.6rem;display:block}
.arc-step .lbl{font-family:var(--sans);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze);display:block;margin-bottom:.9rem}
.arc-step p{font-size:.98rem;color:#bdb7aa;max-width:none;line-height:1.5}

.standard{background:var(--ink);color:var(--limestone);padding:9rem 5%}
.standard .inner{max-width:1360px;margin:0 auto;width:100%}
.standard-head{margin-bottom:4.5rem;max-width:46rem}
.standard-head .eyebrow{color:var(--bronze)}
.standard-head .lede{color:#d0cabc}
.standard-layout{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center}
.std-index{list-style:none}
.std-item{border-top:1px solid rgba(140,121,92,.3);padding:1.7rem 0}
.std-item:last-child{border-bottom:1px solid rgba(140,121,92,.3)}
.std-item h3{font-size:clamp(1.6rem,2.6vw,2.2rem);color:var(--limestone);transition:color .5s var(--ease),padding .5s var(--ease)}
.std-item.active h3{color:var(--bronze);padding-left:1rem}
.std-item p{font-size:1rem;color:#bdb7aa;max-width:34rem;max-height:0;overflow:hidden;opacity:0;transition:max-height .7s var(--ease),opacity .7s var(--ease),margin .7s var(--ease);margin-top:0}
.std-item.active p{max-height:220px;opacity:1;margin-top:1rem}
.std-visual{position:relative;height:66vh;min-height:460px;overflow:hidden}
.std-visual .frame{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.1s var(--ease)}
.std-visual .frame.active{opacity:1}

.invitation{background:var(--limestone);min-height:80vh;display:flex;align-items:center;text-align:center;padding:9rem 5%}
.invitation .inner{max-width:46rem;margin:0 auto}
.invitation .label{font-family:var(--serif);font-style:italic;font-size:1.5rem;color:var(--bronze);margin-bottom:2rem}
.invitation .text{font-size:clamp(1.5rem,2.8vw,2.2rem);color:var(--royal);font-weight:300;line-height:1.4;margin-bottom:3rem}
.invitation-cta{display:inline-block;font-family:var(--sans);font-size:.8rem;letter-spacing:.24em;text-transform:uppercase;color:var(--ink);text-decoration:none;padding-bottom:6px;border-bottom:1px solid var(--bronze);transition:color .5s var(--ease)}
.invitation-cta:hover{color:var(--bronze)}

footer{background:var(--ink);padding:4rem 5% 3rem;border-top:1px solid rgba(140,121,92,.2)}
.footer-inner{max-width:1360px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;gap:2rem;flex-wrap:wrap}
.footer-brand{font-family:var(--serif);letter-spacing:.24em;text-transform:uppercase;font-size:1rem;color:var(--limestone)}
.footer-office{font-family:var(--sans);font-size:.74rem;letter-spacing:.05em;color:rgba(238,234,225,.55);margin-top:.8rem;line-height:1.7}
.footer-office a{color:var(--bronze);text-decoration:none}
.footer-links{display:flex;gap:2rem}
.footer-links a{font-family:var(--sans);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(238,234,225,.5);text-decoration:none;transition:color .4s var(--ease)}
.footer-links a:hover{color:var(--bronze)}
.footer-seal{width:100%;margin-top:3rem;padding-top:2rem;border-top:1px solid rgba(140,121,92,.18);text-align:center}
.footer-seal .s{font-family:var(--serif);font-style:italic;font-size:.98rem;color:rgba(238,234,225,.6)}
.footer-seal .fine{font-family:var(--sans);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:rgba(238,234,225,.32);margin-top:1rem}

.corr-hero{min-height:92vh;display:flex;align-items:flex-end;padding:0 5% 7rem;position:relative;overflow:hidden}
.corr-hero .scrim{background:linear-gradient(180deg,rgba(17,20,22,.2) 0%,rgba(17,20,22,.5) 55%,rgba(17,20,22,.82) 100%)}
.corr-hero .inner{max-width:1360px;margin:0 auto;width:100%;position:relative;z-index:3}
.corr-hero .page-title{color:var(--limestone)}
.corr-hero .lede{color:#e6e1d6;max-width:42rem}
.paths{padding:7rem 5%;background:var(--limestone)}
.paths .inner{max-width:1100px;margin:0 auto}
.path{border-top:1px solid rgba(140,121,92,.34);padding:2.8rem 0;display:grid;grid-template-columns:1fr auto;gap:2rem;align-items:start;transition:padding-left .5s var(--ease)}
.path:last-child{border-bottom:1px solid rgba(140,121,92,.34)}
.path:hover{padding-left:1rem}
.path h3{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:1rem}
.path p{font-size:1.08rem;max-width:42rem;color:var(--granite)}
.path-cta{font-family:var(--sans);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze);white-space:nowrap;padding-top:.6rem}
.form-wrap{padding:7rem 5% 8rem;background:var(--paper)}
.form-wrap .inner{max-width:720px;margin:0 auto}
.form-wrap h2{font-size:clamp(2rem,3.4vw,2.8rem);margin-bottom:2.6rem}
.field{margin-bottom:2rem}
.field label{display:block;font-family:var(--sans);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--granite);margin-bottom:.7rem}
.field input,.field select,.field textarea{width:100%;border:0;border-bottom:1px solid rgba(68,68,68,.34);background:transparent;font-family:var(--serif);font-size:1.15rem;color:var(--ink);padding:.5rem 0;transition:border-color .4s var(--ease)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--royal)}
.field textarea{resize:vertical;min-height:120px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.form-note{font-size:.92rem;color:var(--granite);opacity:.8;margin:1.4rem 0 2.4rem;max-width:none;line-height:1.6}
.send-btn{font-family:var(--sans);font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--limestone);background:var(--ink);border:0;padding:1.1rem 2.6rem;cursor:pointer;transition:background .4s var(--ease)}
.send-btn:hover{background:var(--royal)}

@media (max-width:900px){
  header{padding:1.1rem 5%;gap:1rem}
  .wordmark{font-size:1rem;letter-spacing:.18em;white-space:nowrap;flex:0 0 auto}
  .wm-full{display:none}
  .wm-short{display:inline}
  .nav-toggle{flex:0 0 auto;margin-left:auto}

  nav{position:fixed;inset:0;background:rgba(17,20,22,.98);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;transform:translateX(100%);transition:transform .6s var(--ease)}
  nav.open{transform:translateX(0)}
  nav ul{flex-direction:column;gap:2.6rem;text-align:center}
  nav a{font-size:1rem;color:var(--limestone)}
  .nav-toggle{display:flex;z-index:110}
  .nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);background:var(--limestone)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);background:var(--limestone)}
  .movement{padding:8rem 6% 5rem}
  .scrim-left,.scrim-right{background:linear-gradient(180deg,rgba(15,17,19,.55) 0%,rgba(15,17,19,.85) 100%)}
  .standard-layout{grid-template-columns:1fr;gap:2.5rem}
  .std-visual{height:44vh;min-height:300px;order:-1}
  .std-item p{max-height:none;opacity:1;margin-top:1rem}
  .std-item.active h3{padding-left:0}
  .arc{grid-template-columns:1fr;border-top:0}
  .arc-step{border-left:0;border-top:1px solid rgba(140,121,92,.22);padding:1.6rem 0 0}
  .arc-step:first-child{border-top:0}
  .field-row{grid-template-columns:1fr;gap:0}
  .path{grid-template-columns:1fr;gap:1rem}
  .footer-inner{flex-direction:column}
}

@media (max-width:480px){
  header{padding:1rem 5%}
  .wordmark{font-size:.82rem;letter-spacing:.12em;max-width:calc(100% - 60px)}
  .nav-toggle{flex:0 0 auto}
}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal,.bg{opacity:1;transform:none}.std-item p{max-height:none;opacity:1;margin-top:1rem}}

/* ---------- Legal / Privacy document pages ---------- */
.legal-doc{background:var(--limestone);min-height:100vh;padding:11rem 5% 6rem}
.legal-doc .inner{max-width:52rem;margin:0 auto}
.legal-doc .eyebrow{color:var(--bronze);margin-bottom:1.4rem}
.legal-doc h1{font-family:var(--display);font-weight:400;font-size:clamp(2.4rem,4vw,3.4rem);margin-bottom:1rem;color:var(--royal)}
.legal-doc .meta{font-family:var(--sans);font-size:.76rem;letter-spacing:.06em;color:var(--granite);opacity:.7;margin-bottom:3.5rem;line-height:1.7}
.legal-doc h2{font-family:var(--display);font-weight:400;font-size:clamp(1.4rem,2.2vw,1.8rem);color:var(--royal);margin:2.8rem 0 1rem}
.legal-doc p{font-size:1.12rem;line-height:1.7;color:var(--granite);max-width:none;margin-bottom:1.1rem}
.legal-doc ul{margin:0 0 1.1rem 1.4rem;padding:0}
.legal-doc li{font-size:1.12rem;line-height:1.7;color:var(--granite);margin-bottom:.5rem}
.legal-doc a{color:var(--bronze);text-decoration:none;border-bottom:1px solid rgba(140,121,92,.4)}
.legal-doc .tbc{background:rgba(140,121,92,.14);padding:.05em .4em;border-radius:2px;font-style:italic;color:#6b5c3f}
.legal-doc .note{margin-top:4rem;padding-top:2rem;border-top:1px solid rgba(140,121,92,.3);font-size:.95rem;color:var(--granite);opacity:.8;font-style:italic}

/* ============================================================
   CONTINUOUS HOME — light discipline, varied rhythm (brief 06)
   Images stay bright; legibility by position, not darkness.
   ============================================================ */
/* chapter label that opens each movement */
.chapter-eyebrow{font-family:var(--sans);font-weight:400;font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;color:var(--bronze);margin-bottom:1.6rem}

/* LIGHT scrim variants — very discreet, warm, only a soft wash */
.scrim-soft-left{background:linear-gradient(90deg,rgba(238,234,225,.86) 0%,rgba(238,234,225,.62) 34%,rgba(238,234,225,.18) 60%,rgba(238,234,225,0) 100%)}
.scrim-soft-right{background:linear-gradient(270deg,rgba(238,234,225,.86) 0%,rgba(238,234,225,.62) 34%,rgba(238,234,225,.18) 60%,rgba(238,234,225,0) 100%)}
.scrim-soft-bottom{background:linear-gradient(180deg,rgba(238,234,225,0) 40%,rgba(238,234,225,.45) 78%,rgba(238,234,225,.9) 100%)}
/* for dark-ground chapters where text sits on ink beside a bright image */
.scrim-ink-left{background:linear-gradient(90deg,rgba(17,20,22,.9) 0%,rgba(17,20,22,.66) 34%,rgba(17,20,22,.28) 58%,rgba(17,20,22,0) 100%)}
.scrim-ink-right{background:linear-gradient(270deg,rgba(17,20,22,.9) 0%,rgba(17,20,22,.66) 34%,rgba(17,20,22,.28) 58%,rgba(17,20,22,0) 100%)}

/* chapter as full-bleed image with text panel */
.chapter{position:relative;min-height:100vh;display:flex;align-items:center;padding:9rem 5%;overflow:hidden}
.chapter .inner{width:100%;max-width:1360px;margin:0 auto;position:relative;z-index:3}
.chapter .panel{max-width:40rem}
.chapter .panel.right{margin-left:auto}
.chapter.light .panel{color:var(--granite)}
.chapter.light .chapter-eyebrow{color:var(--bronze)}
.chapter.light .sub-title,.chapter.light .page-title{color:var(--royal)}
.chapter.dark .panel{color:#e8e3d7}
.chapter.dark .sub-title,.chapter.dark .page-title{color:var(--limestone)}
.chapter.dark .panel p{color:#dcd7cb}

/* a purely typographic chapter — statement alone on limestone */
.statement{background:var(--limestone);min-height:76vh;display:flex;align-items:center;padding:9rem 5%}
.statement .inner{max-width:1100px;margin:0 auto}
.statement .big{font-family:var(--display);font-weight:400;font-size:clamp(2rem,3.6vw,3.2rem);line-height:1.2;color:var(--royal);max-width:24ch}

/* a compact framed image (not full-bleed) for rhythm variety */
.framed{background:var(--limestone);padding:7rem 5%}
.framed .inner{max-width:1360px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:4.5rem;align-items:center}
.framed.flip .inner{direction:rtl}
.framed.flip .inner>*{direction:ltr}
.framed .img{height:70vh;min-height:460px;background-size:cover;background-position:center;background-repeat:no-repeat}
.framed .text{max-width:36rem}
.framed .sub-title{color:var(--royal)}
.framed .chapter-eyebrow{color:var(--bronze)}

/* section divider label between the big movements (THE HOUSE / THE WORK) */
.movement-open{background:var(--ink);color:var(--limestone);padding:7rem 5% 6rem;text-align:center;scroll-margin-top:0}
.movement-open .inner{max-width:900px;margin:0 auto}
.movement-open .page-title{color:var(--limestone);margin-bottom:1.4rem}
.movement-open .lede{color:#d6d0c3;margin:0 auto}
.movement-open .chapter-eyebrow{color:var(--bronze);display:block}

@media (max-width:900px){
  .framed .inner{grid-template-columns:1fr;gap:2rem}
  .framed.flip .inner{direction:ltr}
  .framed .img{height:52vh;min-height:320px}
  .chapter{padding:7rem 6%}
  .scrim-soft-left,.scrim-soft-right{background:linear-gradient(180deg,rgba(238,234,225,.35) 0%,rgba(238,234,225,.8) 82%,rgba(238,234,225,.95) 100%)}
  .scrim-ink-left,.scrim-ink-right{background:linear-gradient(180deg,rgba(17,20,22,.55) 0%,rgba(17,20,22,.82) 100%)}
  .statement .big{font-size:clamp(1.6rem,6vw,2.2rem)}
}


/* ============================================================
   MOBILE MENU — full-screen black panel in every scroll state
   (overrides any header .scrolled / .light-head interference)
   ============================================================ */
@media (max-width:900px){
  /* keep the toggle above the panel so it can close */
  header .nav-toggle{z-index:1002}
  /* the open menu is a fixed full-screen layer, independent of header state */
  header#siteHeader nav#nav.open{
    position:fixed;
    inset:0;
    width:100vw;
    height:100vh;
    height:100dvh;
    background:#0b0b0b;              /* solid, fully opaque */
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
    display:flex;
    align-items:center;
    justify-content:center;
    transform:translateX(0);
    z-index:1001;                    /* above header bar and page */
    opacity:1;
  }
  header#siteHeader nav#nav.open ul{flex-direction:column;gap:2.6rem;text-align:center}
  header#siteHeader nav#nav.open a{color:var(--limestone);font-size:1.1rem}
  /* when header is scrolled, its own background must not bleed over the panel */
  header#siteHeader.scrolled nav#nav.open{background:#0b0b0b}
  /* prevent page scroll behind the open menu */
  body.menu-open{overflow:hidden}
}