/* ============================================================
   Dominique Antony — Peinture Murale
   Shared design system: "Le Nuancier" — the peintre-décorateur's
   own specimen book. See /DESIGN.md for the full rationale.
   ============================================================ */

:root{
  --ink:#17140f;
  --ink-soft:#211c14;
  --ink-line: rgba(242,234,217,0.16);
  --paper:#f2ead9;
  --paper-dim:#e7dabd;
  --paper-line: rgba(23,20,15,0.14);
  --on-paper-muted: rgba(23,20,15,0.62);
  --on-ink-muted: rgba(242,234,217,0.6);
  --ochre:#b8823f;
  --ochre-bright:#d9a355;
  --oxblood:#8a3326;
  --lapis:#33456f;
  --verdigris:#52705c;
  --shadow: 0 22px 44px -24px rgba(0,0,0,0.65);
  --f-display:'Fraunces', Georgia, 'Times New Roman', serif;
  --f-body:'Newsreader', Georgia, serif;
  --f-mono:'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --paper-grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--f-body);
  font-size:1.05rem;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--ochre);color:var(--ink)}
:focus-visible{outline:2px solid var(--ochre-bright);outline-offset:3px}
* {scrollbar-color: var(--ochre) var(--ink-soft);}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--f-display);font-weight:600;margin:0;letter-spacing:-0.01em}
.measure{max-width:68ch}

/* ---------- reading progress bar ---------- */
.progress-rail{position:fixed;top:0;left:0;right:0;z-index:70;height:3px;background:transparent}
.progress-fill{height:100%;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--ochre-bright);transition:transform .1s linear;will-change:transform}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--ink-line);
}
.site-head-inner{
  max-width:1400px;margin:0 auto;
  display:flex;align-items:center;gap:2rem;
  padding:0.85rem 1.5rem;
}
.wordmark{text-decoration:none;line-height:1.1}
.wordmark .name{display:block;font-family:var(--f-display);font-size:1.15rem;font-weight:600;color:var(--paper)}
.wordmark .sub{display:block;font-family:var(--f-mono);font-size:0.62rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--on-ink-muted);margin-top:0.15rem}
.primary-nav{display:flex;gap:1.6rem;margin-left:auto;font-family:var(--f-mono);font-size:0.78rem;letter-spacing:0.03em}
.primary-nav > ul{list-style:none;display:flex;gap:1.6rem;margin:0;padding:0}
.primary-nav li{position:relative}
.primary-nav > ul > li > a{text-decoration:none;color:var(--paper);padding:0.4rem 0.1rem;display:inline-block;border-bottom:1px solid transparent}
.primary-nav > ul > li > a:hover,.primary-nav > ul > li > a:focus-visible{border-bottom-color:var(--ochre-bright)}
.primary-nav > ul > li > a[aria-current]{color:var(--ochre-bright);border-bottom-color:var(--ochre-bright)}
.has-sub > .submenu{
  position:absolute;top:100%;left:0;min-width:15rem;
  background:var(--ink-soft);border:1px solid var(--ink-line);
  list-style:none;margin:0.4rem 0 0;padding:0.5rem;
  box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .16s ease, transform .16s ease, visibility .16s;
}
.has-sub:hover > .submenu,.has-sub:focus-within > .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:block;padding:0.4rem 0.6rem;text-decoration:none;color:var(--on-ink-muted);border-radius:2px;font-size:0.76rem}
.submenu a:hover,.submenu a:focus-visible{background:rgba(242,234,217,0.06);color:var(--paper)}
.submenu a[aria-current]{color:var(--ochre-bright)}
.cta{
  font-family:var(--f-mono);font-size:0.78rem;letter-spacing:0.03em;
  background:var(--ochre);color:var(--ink);text-decoration:none;
  padding:0.55rem 1rem;border-radius:2px;white-space:nowrap;
  transition:background .15s ease, transform .15s ease;
  border:none;cursor:pointer;
}
.cta:hover,.cta:focus-visible{background:var(--ochre-bright)}
.cta:active{transform:translateY(1px)}
.nav-toggle{display:none;margin-left:auto}
.mobile-nav{display:none}

/* ---------- hero (homepage only) ---------- */
.hero{
  position:relative;min-height:min(100vh,940px);
  display:flex;flex-direction:column;justify-content:flex-end;
  overflow:hidden;
}
.hero .plate-photo{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 62%;
}
.hero-scrim{
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(23,20,15,0.55) 0%, rgba(23,20,15,0.06) 32%, rgba(23,20,15,0.1) 55%, rgba(23,20,15,0.92) 100%);
}
.hero-edge{
  position:absolute;top:0;left:0;right:0;height:20px;z-index:3;
  background:
    repeating-linear-gradient(127deg, rgba(255,255,255,0.05) 0 2px, rgba(0,0,0,0.16) 2px 5px),
    linear-gradient(180deg, #0c0a07 0%, #050403 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.07), 0 4px 14px rgba(0,0,0,0.6);
  border-bottom:1px solid rgba(0,0,0,0.65);
}
.hero-edge::before,.hero-edge::after{
  content:"";position:absolute;top:5px;width:9px;height:9px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #776c5c, #17140f 72%);
  box-shadow:inset 0 1px 1px rgba(255,255,255,0.18), inset 0 -1px 2px rgba(0,0,0,0.85), 0 1px 1px rgba(0,0,0,0.4);
}
.hero-edge::before{left:8%}
.hero-edge::after{right:8%}
.hero-copy{
  position:relative;z-index:2;max-width:1400px;margin:0 auto;width:100%;
  padding:6rem 1.5rem 2.5rem;
}
.hero-copy h1{
  color:var(--paper);font-size:clamp(1.6rem,3.6vw,2.7rem);font-weight:600;
  max-width:26ch;text-wrap:balance;
}
.hero-actions{margin-top:1.4rem;display:flex;gap:1rem;align-items:center;flex-wrap:wrap}
.hero-actions .cta{padding:0.75rem 1.3rem;font-size:0.82rem}
.hero-actions .ghost{
  font-family:var(--f-mono);font-size:0.78rem;color:var(--paper);text-decoration:none;
  border-bottom:1px solid var(--on-ink-muted);padding-bottom:2px;
}
.hero-actions .ghost:hover{border-color:var(--paper)}
.plate-label{
  position:relative;z-index:2;max-width:1400px;margin:0 auto;width:100%;
  padding:0 1.5rem 2.2rem;
  display:flex;align-items:baseline;gap:1rem;flex-wrap:wrap;
  font-family:var(--f-mono);
}
.plate-no{
  display:inline-flex;align-items:center;gap:0.5rem;
  color:var(--paper);font-size:0.78rem;letter-spacing:0.08em;
  border:1px solid var(--on-ink-muted);padding:0.3rem 0.6rem;border-radius:2px;
}
.plate-no .dot{width:9px;height:9px;border-radius:1px;background:var(--ochre)}
.plate-caption{color:var(--on-ink-muted);font-size:0.8rem}
.plate-link{margin-left:auto;color:var(--paper);text-decoration:none;font-size:0.8rem;border-bottom:1px solid var(--on-ink-muted)}
.plate-link:hover{border-color:var(--paper)}

/* ---------- paper band ---------- */
.page{background-color:var(--paper);background-image:var(--paper-grain);color:var(--ink)}
.page-inner{max-width:1400px;margin:0 auto;padding:4.5rem 1.5rem}
.manifesto .page-inner{padding:5rem 1.5rem;max-width:1000px}
.manifesto .lede{
  font-family:var(--f-body);font-style:italic;font-weight:500;
  font-size:clamp(1.3rem,2.4vw,1.9rem);line-height:1.45;margin:0 0 1.2rem;
  color:var(--ink);
}
.manifesto .sub{font-size:1rem;color:var(--on-paper-muted);margin:0;max-width:56ch}

/* ---------- nuancier / gallery grid ---------- */
.nuancier{background:var(--ink)}
.nuancier .page-inner{padding-top:5rem}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:1.5rem;margin-bottom:2.6rem;flex-wrap:wrap}
.section-head h2{color:var(--paper);font-size:clamp(1.6rem,2.6vw,2.2rem)}
.section-head p{color:var(--on-ink-muted);margin:0.5rem 0 0;max-width:52ch;font-family:var(--f-body);font-size:1rem}

.plate-grid{
  display:grid;gap:1.4rem;align-items:start;
  grid-template-columns:repeat(4,1fr);
  grid-auto-flow:dense;
}
.plate-card{
  background-color:var(--paper);background-image:var(--paper-grain);border-radius:2px;box-shadow:var(--shadow);
  overflow:hidden;text-decoration:none;color:var(--ink);
  display:flex;flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease;
  border:none;padding:0;font:inherit;text-align:left;cursor:pointer;width:100%;
}
.plate-card:hover,.plate-card:focus-visible{transform:translateY(-4px)}
.plate-card .frame{position:relative;background:var(--ink-soft);overflow:hidden;aspect-ratio:4/3}
.plate-card img{display:block;width:100%;height:100%;object-fit:contain;transition:transform .5s ease}
.plate-card:hover img{transform:scale(1.04)}
.plate-card .meta{padding:0.9rem 1rem 1.1rem;font-family:var(--f-mono);margin-top:auto}
.plate-card .meta .row{display:flex;align-items:center;gap:0.5rem;margin-bottom:0.45rem}
.swatch{width:12px;height:12px;border-radius:1px;flex:none}
.swatch--ochre{background:var(--ochre)}
.swatch--oxblood{background:var(--oxblood)}
.swatch--lapis{background:var(--lapis)}
.swatch--verdigris{background:var(--verdigris)}
.plate-card .meta .no{font-size:0.7rem;letter-spacing:0.08em;color:var(--on-paper-muted)}
.plate-card .meta .cap{font-family:var(--f-body);font-style:italic;font-size:0.92rem;line-height:1.35;color:var(--ink);margin:0}

.plate-card.span-2{grid-column:span 2}
.plate-card.span-2 .frame{aspect-ratio:2/1}

.plate-card.index-card{
  background:var(--ink-soft);color:var(--paper);border:1px solid var(--ink-line);
  justify-content:center;padding:1.6rem;box-shadow:none;
}
.plate-card.index-card .no{color:var(--on-ink-muted)}
.plate-card.index-card h3{font-size:1.15rem;margin-bottom:0.5rem}
.plate-card.index-card p{font-family:var(--f-mono);font-size:0.78rem;color:var(--on-ink-muted);margin:0 0 1rem}
.plate-card.index-card .go{font-family:var(--f-mono);font-size:0.8rem;color:var(--ochre-bright)}

/* ---------- mechanism (paired figures) ---------- */
.mechanism .page-inner{max-width:1200px}
.mechanism h2{font-size:clamp(1.5rem,2.4vw,2.1rem);max-width:24ch;margin-bottom:2.6rem}
.mech-pair{display:grid;grid-template-columns:1fr auto 1fr;gap:1.6rem;align-items:center}
.mech-pair figure{margin:0}
.mech-pair img{width:100%;box-shadow:var(--shadow);border-radius:1px}
.mech-pair figcaption{
  font-family:var(--f-mono);font-size:0.8rem;line-height:1.5;color:var(--on-paper-muted);
  margin-top:0.9rem;
}
.mech-arrow{
  font-family:var(--f-mono);color:var(--ochre);font-size:1.6rem;
  writing-mode:horizontal-tb;
}
.img-trigger{all:unset;display:block;width:100%;cursor:pointer}

/* ---------- artisan (portrait + prose) ---------- */
.artisan{background:var(--ink)}
.artisan .page-inner{
  display:grid;grid-template-columns:0.8fr 1.2fr;gap:3.5rem;align-items:center;
}
.artisan .portrait{position:relative}
.artisan .portrait img{width:100%;box-shadow:var(--shadow);border-radius:1px}
.artisan .portrait .plate-no{position:absolute;left:0.8rem;bottom:0.8rem}
.artisan h2{color:var(--paper);font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:1.1rem}
.artisan p{color:var(--on-ink-muted);font-family:var(--f-body);font-size:1.05rem;line-height:1.65;margin:0 0 1rem}
.artisan .read-more{
  font-family:var(--f-mono);font-size:0.82rem;color:var(--paper);text-decoration:none;
  border-bottom:1px solid var(--on-ink-muted);padding-bottom:2px;display:inline-block;margin-top:0.5rem;
}
.artisan .read-more:hover{border-color:var(--paper)}

/* ---------- clientele / ledger ---------- */
.clientele .page-inner{max-width:1200px}
.clientele h2{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:0.8rem}
.clientele .intro{max-width:60ch;color:var(--on-paper-muted);margin:0 0 2.4rem}
.client-ledger{
  columns:3;column-gap:2.4rem;
  font-family:var(--f-mono);font-size:0.92rem;
  border-top:1px solid var(--paper-line);padding-top:1.4rem;
}
.client-ledger li{list-style:none;padding:0.5rem 0;border-bottom:1px solid var(--paper-line);break-inside:avoid}
.clientele .disclaimer{font-family:var(--f-mono);font-size:0.7rem;color:var(--on-paper-muted);margin-top:2rem}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink)}
.cta-band .page-inner{
  text-align:center;padding:5.5rem 1.5rem;max-width:800px;
}
.cta-band h2{color:var(--paper);font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:1rem}
.cta-band p{color:var(--on-ink-muted);font-family:var(--f-mono);font-size:0.92rem;margin:0 0 2rem}
.cta-band .cta{padding:0.9rem 1.8rem;font-size:0.92rem}

/* ---------- footer ---------- */
.site-foot{background:var(--ink);border-top:1px solid var(--ink-line)}
.site-foot .page-inner{max-width:1400px;padding:3.5rem 1.5rem 2.5rem}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:2rem;margin-bottom:2.5rem}
.foot-col h3{font-family:var(--f-mono);font-size:0.7rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--on-ink-muted);margin-bottom:0.9rem;font-weight:500}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0.5rem}
.foot-col a{color:var(--paper);text-decoration:none;font-size:0.88rem}
.foot-col a:hover{color:var(--ochre-bright)}
.foot-brand .name{font-family:var(--f-display);font-size:1.3rem;color:var(--paper)}
.foot-brand p{color:var(--on-ink-muted);font-size:0.88rem;max-width:32ch;margin:0.8rem 0 0}
.foot-legal{
  border-top:1px solid var(--ink-line);padding-top:1.4rem;
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:var(--f-mono);font-size:0.7rem;color:var(--on-ink-muted);
}

/* ---------- tab rail (homepage only) ---------- */
.tab-rail{
  position:fixed;top:50%;right:0;transform:translateY(-50%);
  z-index:55;display:flex;flex-direction:column;
  background:var(--ink-soft);border:1px solid var(--ink-line);border-right:none;
  border-radius:3px 0 0 3px;overflow:hidden;box-shadow:var(--shadow);
}
.tab-rail a{
  display:flex;align-items:center;gap:0.5rem;
  padding:0.7rem 0.6rem;text-decoration:none;
  border-left:3px solid transparent;
  border-bottom:1px solid var(--ink-line);
  font-family:var(--f-mono);font-size:0.7rem;letter-spacing:0.06em;
  color:var(--on-ink-muted);white-space:nowrap;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.tab-rail li:last-child a{border-bottom:none}
.tab-rail a .swatch{width:8px;height:8px}
.tab-rail a .label{writing-mode:vertical-rl;transform:rotate(180deg);text-transform:uppercase}
.tab-rail a:hover,.tab-rail a:focus-visible{background:rgba(242,234,217,0.06);color:var(--paper);border-left-color:var(--ochre-bright)}
.tab-rail ul{list-style:none;margin:0;padding:0}

/* ============================================================
   Interior pages: title band, article, gallery, case study, ledger
   ============================================================ */

/* ---------- breadcrumb + page title band ---------- */
.page-title{background:var(--ink)}
.page-title .page-inner{padding:3.2rem 1.5rem 3rem;max-width:1000px}
.breadcrumb{
  font-family:var(--f-mono);font-size:0.72rem;letter-spacing:0.04em;
  color:var(--on-ink-muted);margin:0 0 1.1rem;
}
.breadcrumb a{color:var(--on-ink-muted);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--paper);border-bottom-color:var(--on-ink-muted)}
.breadcrumb .sep{margin:0 0.5rem;opacity:.5}
.page-title h1{color:var(--paper);font-size:clamp(1.8rem,3.4vw,2.6rem);max-width:22ch}
.page-title .dek{
  font-family:var(--f-body);font-style:italic;color:var(--on-ink-muted);
  font-size:1.05rem;margin-top:1rem;max-width:56ch;
}

/* ---------- article (reading pages) ---------- */
.article-section{background-color:var(--paper);background-image:var(--paper-grain)}
.article-section .page-inner{max-width:760px;padding-top:3.5rem}
.article{color:var(--ink)}
.article p{margin:0 0 1.3rem;font-size:1.05rem;line-height:1.7}
.article p:last-child{margin-bottom:0}
.article strong{font-weight:600}
.article em{font-style:italic}
.article a{color:var(--oxblood);text-decoration:underline;text-decoration-color:rgba(138,51,38,0.35);text-underline-offset:2px}
.article a:hover{text-decoration-color:var(--oxblood)}
.article .rule{
  border:none;border-top:1px solid var(--paper-line);margin:2.2rem 0;
}
.article .lede{
  font-family:var(--f-body);font-style:italic;font-weight:500;
  font-size:1.3rem;line-height:1.5;color:var(--ink);
}
.article .attribution{
  font-family:var(--f-mono);font-size:0.8rem;color:var(--on-paper-muted);
  margin:-0.8rem 0 1.6rem;
}
.article h2{font-size:1.4rem;margin:2.6rem 0 1rem}
.article figure{margin:2.2rem 0;border-radius:2px;overflow:hidden;box-shadow:var(--shadow)}
.article-figure{
  background:var(--ink-soft);
  border:none;padding:0;cursor:pointer;display:block;width:100%;
}
.article-figure .frame{aspect-ratio:3/2;position:relative;overflow:hidden;background:var(--ink-soft)}
.article-figure img{width:100%;height:100%;object-fit:contain}
.article figcaption{
  font-family:var(--f-mono);font-style:normal;font-size:0.82rem;color:var(--on-paper-muted);
  background:var(--paper);padding:0.8rem 1rem;text-align:left;
}
.article .callout{
  background:var(--ink-soft);color:var(--paper);border-radius:2px;padding:1.4rem 1.6rem;
  margin:2rem 0;font-family:var(--f-mono);font-size:0.88rem;line-height:1.6;
}
.article .callout strong{color:var(--ochre-bright)}
.article .callout p{margin:0 0 0.7rem;color:var(--on-ink-muted);font-family:var(--f-mono);font-size:0.88rem;line-height:1.6}
.article .callout p:last-child{margin-bottom:0}

/* ---------- case study (gallery page mixing narrative + photos) ---------- */
.case-study{background-color:var(--paper);background-image:var(--paper-grain)}
.case-study .page-inner{max-width:800px;padding-top:3.5rem}

/* ---------- generic gallery page ---------- */
.gallery-section{background:var(--ink)}
.gallery-section .page-inner{padding-top:3.5rem}
.gallery-intro{color:var(--on-ink-muted);font-family:var(--f-body);font-size:1.05rem;line-height:1.65;max-width:64ch;margin:0 0 2.6rem}

/* ---------- scroll reveal ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.js .reveal.is-visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;
  background:rgba(13,11,8,0.96);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s;
  padding:4.5rem 1.5rem 3rem;
}
.lightbox.is-open{opacity:1;visibility:visible}
.lightbox-figure{max-width:min(92vw,1200px);max-height:100%;display:flex;flex-direction:column;align-items:center;gap:1rem}
.lightbox-img-wrap{max-width:100%;max-height:calc(100vh - 10rem);display:flex}
.lightbox-img{max-width:100%;max-height:calc(100vh - 10rem);width:auto;height:auto;object-fit:contain;box-shadow:var(--shadow);border-radius:1px}
.lightbox-cap{
  font-family:var(--f-body);font-style:italic;color:var(--on-ink-muted);
  font-size:0.95rem;text-align:center;max-width:64ch;
}
.lightbox-counter{
  font-family:var(--f-mono);font-size:0.72rem;letter-spacing:0.08em;color:var(--on-ink-muted);
}
.lightbox-btn{
  position:fixed;display:flex;align-items:center;justify-content:center;
  width:2.6rem;height:2.6rem;border-radius:2px;
  background:var(--ink-soft);border:1px solid var(--ink-line);color:var(--paper);
  cursor:pointer;transition:background .15s ease,border-color .15s ease;
}
.lightbox-btn:hover,.lightbox-btn:focus-visible{background:rgba(242,234,217,0.08);border-color:var(--ochre-bright)}
.lightbox-close{top:1.2rem;right:1.5rem}
.lightbox-prev{left:1.2rem;top:50%;transform:translateY(-50%)}
.lightbox-next{right:1.2rem;top:50%;transform:translateY(-50%)}
.lightbox-btn[disabled]{opacity:0.3;cursor:default;pointer-events:none}
@media (max-width:700px){
  .lightbox-prev{left:0.5rem}
  .lightbox-next{right:0.5rem}
  .lightbox-btn{width:2.3rem;height:2.3rem}
}

/* ============================================================ */
@media (max-width:1180px){
  .tab-rail{display:none}
  .artisan .page-inner{grid-template-columns:1fr;gap:2rem}
  .artisan .portrait{max-width:22rem}
  .foot-grid{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:820px){
  .primary-nav{display:none}
  .nav-toggle{display:block;position:relative}
  .nav-toggle summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    width:2.4rem;height:2.4rem;border:1px solid var(--ink-line);border-radius:2px;
    color:var(--paper);
  }
  .nav-toggle summary::-webkit-details-marker{display:none}
  .nav-toggle[open] summary{background:var(--ink-soft);border-color:var(--ochre)}
  .mobile-nav{
    display:block;position:fixed;top:4.4rem;right:1.5rem;
    width:min(84vw,22rem);max-height:calc(100vh - 5.5rem);overflow-y:auto;
    background:var(--ink-soft);border:1px solid var(--ink-line);
    border-radius:3px;box-shadow:var(--shadow);padding:1rem;
  }
  .mobile-nav ul{list-style:none;margin:0;padding:0}
  .mobile-nav li a{
    display:block;padding:0.55rem 0.3rem;text-decoration:none;color:var(--paper);
    font-family:var(--f-mono);font-size:0.88rem;border-bottom:1px solid var(--ink-line);
  }
  .mobile-nav li.sub a{color:var(--on-ink-muted);font-size:0.8rem;padding-left:1rem}
  .mobile-nav li:last-child a{border-bottom:none}
  .plate-grid{grid-template-columns:repeat(2,1fr)}
  .plate-card.span-2{grid-column:span 2}
  .mech-pair{grid-template-columns:1fr;text-align:left}
  .mech-arrow{transform:rotate(90deg);margin:0.4rem 0}
  .client-ledger{columns:2}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .plate-grid{grid-template-columns:1fr}
  .plate-card.span-2{grid-column:span 1}
  .plate-card.span-2 .frame{aspect-ratio:4/3}
  .client-ledger{columns:1}
  .foot-grid{grid-template-columns:1fr}
  .hero-copy{padding-top:5rem}
  .plate-label{align-items:flex-start}
  .plate-link{margin-left:0}
  .article-section .page-inner,.case-study .page-inner{padding-left:1.25rem;padding-right:1.25rem}
}