/* HeirloomID — design system v3 "Japanned & gilt"
   Black enamel, gilt pinstriping and ledger paper: the materials of the machines and of Singer's own records. */

/* Self-hosted fonts (SIL Open Font License) */
@font-face{font-family:"Caslon Display";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/libre-caslon-display-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Caslon";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/libre-caslon-text-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Caslon";font-style:italic;font-weight:400;font-display:swap;src:url(/fonts/libre-caslon-text-latin-400-italic.woff2) format("woff2")}
@font-face{font-family:"Caslon";font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/libre-caslon-text-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Archivo";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/archivo-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Archivo";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/archivo-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Archivo";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/archivo-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}

:root{
  /* japanned enamel */
  --japan:#16130f; --japan-2:#1f1a15; --japan-3:#2b241d; --japan-line:rgba(214,178,108,.24);
  /* gilt */
  --gilt:#c8a15b; --gilt-hi:#e8cf94; --gilt-lo:#8f7039; --gilt-wash:#f3e7c9;
  /* ledger paper */
  --paper:#f4f1e9; --paper-2:#ebe5d7; --paper-3:#e1d9c6; --card:#fbfaf6;
  --ink:#1d1a16; --ink-2:#4a443b; --muted:#7b7366; --on-dark:#efe7d6; --on-dark-2:#b9ad97;
  --rule:#ddd4c1; --rule-2:#cbbfa6;
  /* ledger red ink */
  --red:#8c2a2a; --red-2:#6e1f20; --red-wash:#f4e4df;
  --green:#3d6b4a; --amber:#8b5e10;
  --display:"Caslon Display","Caslon",Georgia,"Times New Roman",serif;
  --serif:"Caslon",Georgia,"Times New Roman",serif;
  --sans:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:1240px; --r:6px; --r-lg:10px;
  --lift:0 1px 0 rgba(255,255,255,.6) inset,0 1px 2px rgba(29,26,22,.06),0 14px 34px -22px rgba(29,26,22,.38);
  --lift-dark:0 30px 70px -30px rgba(0,0,0,.75);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--paper);color:var(--ink);font:16.5px/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-kerning:normal}
img,svg{max-width:100%;height:auto}
a{color:var(--red);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--red-2)}
::selection{background:var(--gilt-wash);color:var(--ink)}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:400}
h1,h2{font-family:var(--display);letter-spacing:-.012em;line-height:1.06}
h1{font-size:clamp(2.6rem,6.2vw,5rem)}
h2{font-size:clamp(2rem,3.8vw,3.1rem)}
h3{font-family:var(--serif);font-size:1.32rem;line-height:1.25;font-weight:700;letter-spacing:-.005em}
h4{font-family:var(--sans);font-size:.95rem;font-weight:600}
p{margin:0 0 1em}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
li{margin:.3em 0}
code{font-family:var(--mono);font-size:.88em;background:var(--paper-2);padding:1px 6px;border-radius:4px;white-space:nowrap}
.wrap{max-width:var(--max);margin:0 auto;padding:0 32px}
.narrow{max-width:860px}
.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--gilt-hi);color:var(--ink);padding:8px 14px;border-radius:6px;z-index:99}
.skip:focus{left:12px}
:focus-visible{outline:2px solid var(--gilt);outline-offset:3px;border-radius:3px}

/* ---------- type helpers */
.kicker{display:flex;align-items:center;gap:14px;font:italic 400 1.05rem/1.2 var(--serif);color:var(--gilt-lo);margin-bottom:16px}
.kicker::before{content:"";width:34px;height:7px;flex:none;background:
  linear-gradient(currentColor,currentColor) 0 1px/100% 1px no-repeat,
  linear-gradient(currentColor,currentColor) 0 5px/100% 1px no-repeat;opacity:.75}
.dark .kicker,.kicker.on-dark{color:var(--gilt)}
.kicker.center{justify-content:center}
.kicker.center::after{content:"";width:34px;height:7px;flex:none;background:inherit;background:
  linear-gradient(currentColor,currentColor) 0 1px/100% 1px no-repeat,
  linear-gradient(currentColor,currentColor) 0 5px/100% 1px no-repeat;opacity:.75}
.lede{font:400 1.2rem/1.62 var(--serif);color:var(--ink-2);max-width:640px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.center{text-align:center}
.serif{font-family:var(--serif)}
.num{font-family:var(--sans);font-variant-numeric:tabular-nums lining-nums}
.t-mono{font-family:var(--mono);font-size:.92em;letter-spacing:.02em}
.ital{font-family:var(--serif);font-style:italic}

/* ---------- header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(22,19,15,.94);backdrop-filter:saturate(140%) blur(10px);-webkit-backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--japan-line)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:linear-gradient(90deg,transparent,rgba(200,161,91,.35) 20%,rgba(200,161,91,.35) 80%,transparent)}
.site-header .wrap{display:flex;align-items:center;gap:28px;height:76px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;flex-shrink:0}
.logo svg{width:40px;height:40px}
.logo-word{font-family:var(--display);font-size:1.6rem;letter-spacing:.005em;line-height:1;color:#f6efe0}
.logo-word b{font-family:var(--sans);font-weight:600;font-size:.62em;letter-spacing:.2em;color:var(--gilt);margin-left:4px;vertical-align:.2em}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav>a,.nav .dd>button{color:#ddd3bf;text-decoration:none;font:500 .92rem var(--sans);padding:10px 13px;border-radius:6px;background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.nav>a:hover,.nav .dd>button:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav>a[aria-current=page],.nav .dd>button[aria-current=page]{color:var(--gilt-hi)}
.dd{position:relative}
.dd>button svg{width:10px;height:10px;transition:transform .2s}
.dd-menu{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(6px);width:640px;background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);box-shadow:0 30px 60px -30px rgba(0,0,0,.45);padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:2px 10px;opacity:0;visibility:hidden;transition:.18s ease}
.dd-menu::before{content:"";position:absolute;inset:6px;border:1px solid var(--paper-3);border-radius:6px;pointer-events:none}
.dd:hover .dd-menu,.dd:focus-within .dd-menu,.dd.open .dd-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dd:hover>button svg,.dd.open>button svg{transform:rotate(180deg)}
.dd-menu a{position:relative;display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:center;padding:8px 10px;border-radius:6px;text-decoration:none;color:var(--ink)}
.dd-menu a:hover{background:var(--paper)}
.dd-menu .dd-ico{height:30px;color:var(--ink-2)}
.dd-menu .dd-ico svg{width:44px;height:30px}
.dd-menu a strong{display:block;font:600 .92rem/1.25 var(--sans)}
.dd-menu a span{font-size:.78rem;color:var(--muted)}
.dd-menu .dd-all{grid-column:1/-1;display:block;text-align:center;margin-top:8px;border-top:1px solid var(--rule);border-radius:0;padding-top:14px;font:600 .88rem var(--sans);color:var(--red)}
.header-cta{margin-left:10px}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--japan-line);color:#fff;border-radius:6px;width:44px;height:44px;cursor:pointer;padding:0}
.menu-btn svg{width:20px;height:20px;vertical-align:middle}

/* ---------- buttons */
.btn{--bg:var(--ink);--fg:#fff;display:inline-flex;align-items:center;justify-content:center;gap:9px;background:var(--bg);color:var(--fg);border:1px solid transparent;font:600 .95rem/1 var(--sans);letter-spacing:.005em;padding:14px 22px;border-radius:6px;text-decoration:none;cursor:pointer;transition:background .18s,color .18s,border-color .18s,box-shadow .18s;white-space:nowrap}
.btn svg{width:16px;height:16px;flex:none}
.btn:hover{background:var(--japan-3);color:#fff}
.btn-gilt{--bg:linear-gradient(180deg,#e2c37f,#c29a52);background:linear-gradient(180deg,#e2c37f,#c29a52);color:#1a150f;border-color:#a8843f;box-shadow:inset 0 1px 0 rgba(255,255,255,.45),0 10px 24px -12px rgba(200,161,91,.7)}
.btn-gilt:hover{background:linear-gradient(180deg,#ebd193,#cba45c);color:#1a150f}
.btn-red{background:var(--red)}
.btn-red:hover{background:var(--red-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--rule-2)}
.btn-ghost:hover{background:var(--card);color:var(--ink);border-color:var(--ink-2)}
.btn-ghost.on-dark,.dark .btn-ghost{color:var(--on-dark);border-color:rgba(232,207,148,.35)}
.btn-ghost.on-dark:hover,.dark .btn-ghost:hover{background:rgba(255,255,255,.06);color:#fff;border-color:var(--gilt)}
.btn-sm{padding:10px 15px;font-size:.86rem}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font:600 .95rem var(--sans);text-decoration:none;color:var(--red)}
.link-arrow svg{width:15px;height:15px;transition:transform .18s}
.link-arrow:hover svg{transform:translateX(3px)}
.dark .link-arrow{color:var(--gilt-hi)}

/* ---------- surfaces */
.dark{background:var(--japan);color:var(--on-dark);position:relative;isolation:isolate}
.dark h1,.dark h2,.dark h3,.dark h4{color:#f8f1e2}
.dark .lede,.dark p{color:var(--on-dark-2)}
.dark a:not(.btn){color:var(--gilt-hi)}
.texture{background-image:radial-gradient(ellipse 80% 60% at 78% 10%,rgba(200,161,91,.10),transparent 60%),radial-gradient(ellipse 60% 70% at 0% 100%,rgba(140,42,42,.12),transparent 60%),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='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 .9 0 0 0 0 .7 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
/* gilt pinstripe: two hairlines with notched corners, as on the bed of the machines */
.pinstripe{position:relative}
.pinstripe::before,.pinstripe::after{content:"";position:absolute;pointer-events:none;border:1px solid rgba(200,161,91,.5);border-radius:3px}
.pinstripe::before{inset:14px}
.pinstripe::after{inset:19px;border-color:rgba(200,161,91,.22)}

.section{padding:112px 0}
.section.tight{padding:72px 0}
.section.flush-top{padding-top:0}
.alt{background:var(--paper-2)}
.ledger{background-color:var(--card);background-image:repeating-linear-gradient(180deg,transparent 0 31px,rgba(140,42,42,.07) 31px 32px)}

.sec-head{max-width:700px;margin-bottom:52px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{margin:0 0 16px}
.sec-head p{font:400 1.12rem/1.6 var(--serif);color:var(--ink-2);margin:0}
.dark .sec-head p{color:var(--on-dark-2)}
/* the reference-book layout: heading in the margin, content beside it */
.margin-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:64px;align-items:start}
.margin-layout>.sec-head{position:sticky;top:110px;margin:0}

/* ---------- hero (home) */
.hero{padding:44px 0 0;overflow:hidden}
.hero-frame{position:relative;padding:76px 64px 64px;margin-bottom:0}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero h1{margin:0 0 22px;color:#faf3e3;font-size:clamp(3rem,6.6vw,5.6rem)}
.hero h1 .gilt{color:var(--gilt-hi);font-style:normal}
.hero .lede{color:#cbbfa8;margin-bottom:34px}
.hero-art{position:relative;color:var(--gilt)}
.hero-art svg{width:100%;filter:drop-shadow(0 20px 40px rgba(0,0,0,.4))}
.hero-art .ex-plate{position:absolute;right:2%;bottom:6%;background:rgba(22,19,15,.88);border:1px solid var(--japan-line);border-radius:6px;padding:14px 18px;font:500 .78rem/1.5 var(--sans);color:var(--on-dark-2);box-shadow:var(--lift-dark)}
.hero-art .ex-plate b{display:block;font:500 1.15rem/1.4 var(--mono);color:#fff;letter-spacing:.06em}
.hero-art .ex-plate i{font:italic 400 .82rem var(--serif);color:var(--gilt)}
.js .draw path,.js .draw circle,.js .draw rect,.js .draw ellipse{stroke-dasharray:var(--len,1200);stroke-dashoffset:var(--len,1200);animation:draw 2.4s cubic-bezier(.5,0,.2,1) forwards}
.js .draw .orn path{animation-delay:1.1s;animation-duration:1.8s}
@keyframes draw{to{stroke-dashoffset:0}}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--japan-line);margin-top:56px}
.hero-stats div{padding:26px 26px 6px;border-left:1px solid var(--japan-line)}
.hero-stats div:first-child{border-left:0;padding-left:0}
.hero-stats b{display:block;font:400 2.5rem/1 var(--display);color:#faf3e3;margin-bottom:8px}
.hero-stats span{font-size:.86rem;color:var(--on-dark-2)}

/* ---------- page hero */
.page-hero{padding:30px 0 0}
.page-hero .hero-frame{padding:56px 60px 60px}
.page-hero h1{color:#faf3e3;margin:0 0 20px;font-size:clamp(2.5rem,5.4vw,4.4rem)}
.page-hero .lede{color:#cbbfa8}
.page-hero .hero-grid{grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr)}
.page-hero .hero-art{color:var(--gilt);opacity:.95}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:.84rem;color:var(--on-dark-2);margin-bottom:26px}
.crumbs a{color:var(--on-dark-2)!important;text-decoration:none}
.crumbs a:hover{color:#fff!important}
.crumbs span{opacity:.5}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chip{display:inline-flex;align-items:center;gap:8px;font-size:.84rem;color:var(--on-dark-2);border:1px solid var(--japan-line);border-radius:999px;padding:7px 14px;background:rgba(255,255,255,.025)}
.chip b{color:var(--gilt-hi);font-weight:600}
.highlights{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--japan-line);margin-top:44px}
.highlights div{padding:22px 22px 0;border-left:1px solid var(--japan-line)}
.highlights div:first-child{border-left:0;padding-left:0}
.highlights b{display:block;font:400 1.75rem/1.1 var(--display);color:#faf3e3;margin-bottom:6px}
.highlights span{font-size:.82rem;color:var(--on-dark-2)}

/* ---------- lookup instrument */
.instrument{position:relative;background:linear-gradient(180deg,#26201a,#1b1713);border:1px solid rgba(200,161,91,.32);border-radius:var(--r-lg);padding:24px;box-shadow:var(--lift-dark),inset 0 1px 0 rgba(255,255,255,.04)}
.instrument>label{display:flex;justify-content:space-between;gap:10px;font:600 .8rem var(--sans);color:var(--gilt);margin-bottom:12px}
.instrument>label span{font:italic 400 .86rem var(--serif);color:var(--on-dark-2)}
.field{display:flex;gap:8px;background:#0f0d0a;border:1px solid rgba(200,161,91,.28);border-radius:8px;padding:7px}
.field:focus-within{border-color:var(--gilt)}
.field input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:#fff;font:500 1.5rem/1 var(--mono);letter-spacing:.1em;padding:10px 12px;text-transform:uppercase}
.field input::placeholder{color:#5c5246}
.examples{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-top:14px;font-size:.82rem;color:var(--on-dark-2)}
.examples button{font:500 .78rem var(--mono);color:#e8dcc4;background:rgba(255,255,255,.04);border:1px solid var(--japan-line);border-radius:999px;padding:5px 11px;cursor:pointer}
.examples button:hover{border-color:var(--gilt);color:#fff}
.result:empty{display:none}
.result{margin-top:20px}
.instrument.light{background:var(--card);border-color:var(--rule);box-shadow:var(--lift)}
.instrument.light>label{color:var(--red)}
.instrument.light>label span{color:var(--muted)}
.instrument.light .field{background:var(--paper);border-color:var(--rule-2)}
.instrument.light .field input{color:var(--ink)}
.instrument.light .field input::placeholder{color:#b8ad99}
.instrument.light .examples{color:var(--muted)}
.instrument.light .examples button{color:var(--ink);background:var(--paper);border-color:var(--rule)}

/* result: a ledger entry */
.cert{position:relative;background:var(--card);color:var(--ink);border-radius:8px;padding:26px 26px 22px;border:1px solid var(--rule);background-image:repeating-linear-gradient(180deg,transparent 0 27px,rgba(140,42,42,.06) 27px 28px);box-shadow:0 18px 40px -24px rgba(0,0,0,.6)}
.cert::before{content:"";position:absolute;top:0;bottom:0;left:56px;width:1px;background:rgba(140,42,42,.25);box-shadow:3px 0 0 rgba(140,42,42,.12)}
.cert>*{position:relative}
.cert-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;padding-left:44px}
.cert-kicker{font:italic 400 .95rem var(--serif);color:var(--red)}
.cert-serial{font:500 1rem var(--mono);letter-spacing:.12em;color:var(--ink-2);margin-top:4px}
.cert-year{font:400 clamp(2.3rem,5vw,3.2rem)/1.05 var(--display);color:var(--ink);margin:6px 0 4px}
.cert-sub{font:600 .98rem var(--sans);color:var(--ink-2)}
.cert.err .cert-year{font-size:1.7rem}
.cert.err{padding-left:26px}
.cert.err::before{display:none}
.cert.err .cert-sub{font:400 .95rem/1.6 var(--sans);margin:10px 0 0}
.seal{flex:none;width:96px;height:96px;border-radius:50%;display:grid;place-items:center;text-align:center;font:600 .62rem/1.25 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--red);border:1.5px solid var(--red);box-shadow:inset 0 0 0 4px var(--card),inset 0 0 0 5px rgba(140,42,42,.5);transform:rotate(-8deg)}
.seal.approx{color:var(--amber);border-color:var(--amber);box-shadow:inset 0 0 0 4px var(--card),inset 0 0 0 5px rgba(139,94,16,.45)}
.cert-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 24px;margin:20px 0 0;padding:16px 0 0 44px;border-top:1px solid var(--rule)}
.cert-grid dt{font:600 .74rem var(--sans);color:var(--muted);margin-bottom:2px}
.cert-grid dd{margin:0;font-size:.95rem;font-weight:500}
.cert-models{margin:16px 0 0 44px;font-size:.88rem;color:var(--ink-2)}
.cert-models b{font-weight:600;color:var(--ink)}
.cert-models a{display:inline-block;margin:6px 6px 0 0;padding:4px 10px;border:1px solid var(--rule-2);border-radius:999px;text-decoration:none;color:var(--ink);font-size:.8rem;background:var(--paper)}
.cert-models a:hover{border-color:var(--red);color:var(--red)}
.cert-note{margin:16px 0 0 44px;font:italic 400 .92rem/1.55 var(--serif);color:var(--ink-2)}
.cert-actions{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0 44px}
.cert.err .cert-note,.cert.err .cert-actions{margin-left:0}

/* ---------- trust row */
.sources-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 40px;padding:28px 0;border-bottom:1px solid var(--rule)}
.sources-row p{margin:0;font:italic 400 1.02rem var(--serif);color:var(--ink-2)}
.sources-row ul{display:flex;flex-wrap:wrap;gap:10px 32px;list-style:none;margin:0;padding:0}
.sources-row li{margin:0;font:600 .9rem var(--sans);color:var(--ink)}
.sources-row li span{display:block;font:400 .78rem var(--sans);color:var(--muted)}

/* ---------- steps (true sequences only) */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--ink)}
.step{padding:30px 32px 6px 0;position:relative}
.step+.step{padding-left:32px;border-left:1px solid var(--rule)}
.step .n{display:block;font:400 3.4rem/1 var(--display);color:var(--gilt-lo);margin-bottom:18px}
.step h3{margin-bottom:10px}
.step p{color:var(--ink-2);margin:0}
.steps.c4{grid-template-columns:repeat(4,1fr)}

/* ---------- split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split.top{align-items:start}

/* ---------- lists */
.checks{list-style:none;padding:0;margin:0 0 1.4em}
.checks li{position:relative;padding:12px 0 12px 34px;border-bottom:1px solid var(--rule);margin:0}
.checks li:first-child{border-top:1px solid var(--rule)}
.checks li::before{content:"";position:absolute;left:4px;top:19px;width:14px;height:8px;border-left:2px solid var(--red);border-bottom:2px solid var(--red);transform:rotate(-45deg)}
.dark .checks li{border-color:var(--japan-line)}
.dark .checks li::before{border-color:var(--gilt)}

/* specimens of serial formats */
.specimens{display:grid;gap:14px;margin:0 0 26px}
.specimen{display:grid;grid-template-columns:200px 1fr;gap:20px;align-items:center;padding:16px 18px;background:var(--card);border:1px solid var(--rule);border-radius:var(--r)}
.specimen .stamp{font:500 1.35rem/1 var(--mono);letter-spacing:.14em;color:var(--ink);background:linear-gradient(180deg,#2a241d,#16130f);color:#e9dfc8;padding:12px 14px;border-radius:4px;text-align:center;box-shadow:inset 0 2px 4px rgba(0,0,0,.6),0 1px 0 rgba(255,255,255,.6)}
.specimen .stamp em{font-style:normal;color:var(--gilt-hi)}
.specimen b{display:block;font:600 .98rem var(--sans);margin-bottom:2px}
.specimen span{font-size:.9rem;color:var(--ink-2)}

/* ---------- callout */
.callout{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:var(--r);background:var(--card);border:1px solid var(--rule);border-left:3px solid var(--gilt)}
.callout p{margin:0;font-size:.95rem;color:var(--ink-2)}
.callout .ci{flex:none;width:26px;height:26px;border-radius:50%;background:var(--gilt-wash);color:var(--gilt-lo);display:grid;place-items:center}
.callout .ci svg{width:15px;height:15px}
.callout.differ{border-left-color:var(--amber)}
.callout.differ .ci{background:#f6e9cf;color:var(--amber)}
.dark .callout{background:rgba(255,255,255,.03);border-color:var(--japan-line);border-left-color:var(--gilt)}
.dark .callout p{color:var(--on-dark-2)}

/* ---------- figure */
.figure{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:26px;box-shadow:var(--lift);margin:0}
.figure figcaption{font:italic 400 .92rem var(--serif);color:var(--muted);text-align:center;margin-top:14px}

/* ---------- result anatomy */
.anatomy{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;align-items:center}
.anatomy .cert{transform:rotate(-.6deg)}
.anatomy-notes{list-style:none;margin:0;padding:0;counter-reset:a}
.anatomy-notes li{counter-increment:a;display:grid;grid-template-columns:38px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--rule);margin:0}
.anatomy-notes li::before{content:counter(a);width:30px;height:30px;border-radius:50%;border:1px solid var(--red);color:var(--red);display:grid;place-items:center;font:600 .85rem var(--sans)}
.anatomy-notes b{display:block;font:600 1rem var(--sans);margin-bottom:2px}
.anatomy-notes p{margin:0;color:var(--ink-2);font-size:.95rem}
.cert .pin{position:absolute;width:22px;height:22px;border-radius:50%;background:var(--red);color:#fff;font:600 .72rem/22px var(--sans);text-align:center;box-shadow:0 0 0 3px var(--card)}

/* ---------- factory register */
.register{border-top:1px solid var(--ink)}
.reg-row{display:grid;grid-template-columns:minmax(0,3.2fr) minmax(0,3fr) minmax(0,4fr);gap:28px;padding:26px 0;border-bottom:1px solid var(--rule);align-items:start}
.reg-row h3{font-size:1.3rem;margin:0 0 4px}
.reg-row .country{font:italic 400 .95rem var(--serif);color:var(--muted)}
.reg-row p{margin:0;color:var(--ink-2);font-size:.95rem}
.reg-life{font-size:.8rem;color:var(--muted)}
.reg-life .track{position:relative;height:8px;background:var(--paper-2);border-radius:4px;margin:8px 0 6px}
.reg-life .track i{position:absolute;top:0;bottom:0;background:var(--ink-2);border-radius:4px}
.reg-life .track i.p{background:var(--red);top:-3px;bottom:-3px;border-radius:2px}
.reg-life .scale{display:flex;justify-content:space-between}
.prefixes{display:flex;flex-wrap:wrap;gap:4px;margin-top:10px}
.pfx{font:500 .74rem var(--mono);letter-spacing:.04em;background:var(--japan);color:#ecdfc4;border-radius:3px;padding:3px 6px}

/* ---------- history (milestones) */
.history{position:relative;display:grid;grid-template-columns:repeat(2,1fr);gap:0 80px}
.history::before{content:"";position:absolute;left:50%;top:6px;bottom:6px;width:1px;background:var(--japan-line)}
.mile{position:relative;padding:0 0 38px}
.mile:nth-child(even){transform:translateY(64px)}
.mile .yr{font:400 2.4rem/1 var(--display);color:var(--gilt-hi)}
.mile h3{margin:8px 0 6px;font-size:1.15rem;color:#f8f1e2}
.mile p{margin:0;font-size:.95rem;color:var(--on-dark-2)}
.mile::after{content:"";position:absolute;top:14px;width:9px;height:9px;border-radius:50%;background:var(--japan);border:1.5px solid var(--gilt)}
.mile:nth-child(odd)::after{right:-45px}
.mile:nth-child(even)::after{left:-45px}
.history-foot{text-align:center;margin-top:96px}

/* ---------- model timeline svg */
.timeline{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:26px 28px 18px;overflow-x:auto;box-shadow:var(--lift)}
.timeline svg{min-width:760px;display:block}
.timeline .legend{display:flex;flex-wrap:wrap;gap:18px;font-size:.8rem;color:var(--muted);margin-top:8px}
.timeline .legend i{display:inline-block;width:20px;height:8px;border-radius:4px;background:var(--red);margin-right:7px;vertical-align:middle}
.timeline .legend i.d{background:none;border-top:3px dashed #c09a9a;height:0;border-radius:0}
.tl-row a:hover text{fill:var(--red)}
.tl-row a:hover .bar{fill:var(--red-2)}

/* ---------- cards */
.cards{display:grid;gap:22px}
.c2{grid-template-columns:repeat(2,1fr)}
.c3{grid-template-columns:repeat(3,1fr)}
.c4{grid-template-columns:repeat(4,1fr)}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:24px;text-decoration:none;color:var(--ink);transition:border-color .18s,box-shadow .18s}
a.card:hover{border-color:var(--rule-2);box-shadow:var(--lift);color:var(--ink)}
.card h3{margin:0 0 8px}
.card p{color:var(--ink-2);font-size:.95rem;margin:0 0 14px}
.card .kick{font:italic 400 .92rem var(--serif);color:var(--red);margin-bottom:6px}
.card .link-arrow{margin-top:auto}

/* model cards: a catalogue plate */
.model-card{padding:0;overflow:hidden}
.model-card .thumb{position:relative;height:170px;display:grid;place-items:center;background:var(--japan);color:var(--gilt);border-bottom:1px solid var(--rule)}
.model-card .thumb::before{content:"";position:absolute;inset:10px;border:1px solid rgba(200,161,91,.32);border-radius:3px}
.model-card .thumb svg{width:62%;max-height:120px}
.model-card .thumb .no{position:absolute;left:20px;top:16px;font:italic 400 .85rem var(--serif);color:var(--on-dark-2)}
.model-card .thumb .yrs{position:absolute;right:20px;top:16px;font:500 .8rem var(--sans);color:var(--gilt-hi)}
.model-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.model-card h3{font-size:1.28rem}
.model-card dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;margin:auto 0 0;padding-top:14px;border-top:1px solid var(--rule);font-size:.82rem}
.model-card dt{color:var(--muted)}
.model-card dd{margin:0;font-weight:500}
a.model-card:hover .thumb{color:var(--gilt-hi)}

.tag{display:inline-flex;align-items:center;font:600 .72rem var(--sans);padding:4px 9px;border-radius:999px;background:var(--paper-2);color:var(--ink-2)}
.tag.gilt{background:var(--gilt-wash);color:var(--gilt-lo)}
.tag.red{background:var(--red-wash);color:var(--red)}

/* ---------- mechanism families */
.families{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink)}
.family{padding:26px 24px 10px;border-left:1px solid var(--rule)}
.family:first-child{border-left:0;padding-left:0}
.family .art{height:70px;color:var(--ink);margin-bottom:12px}
.family .art svg{height:70px;width:auto}
.family h3{font-size:1.15rem;margin-bottom:8px}
.family p{font-size:.93rem;color:var(--ink-2);margin:0 0 12px}
.family ul{list-style:none;padding:0;margin:0}
.family li{margin:0;padding:6px 0;border-top:1px solid var(--rule);font-size:.9rem}
.family li a{text-decoration:none;color:var(--ink);font-weight:500}
.family li a:hover{color:var(--red)}

/* ---------- identifier */
.ident{display:grid;grid-template-columns:1fr 1fr 1fr;gap:22px}
.ident-q{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:22px}
.ident-q h3{display:flex;gap:12px;align-items:center;font-size:1.1rem;margin-bottom:16px}
.ident-q h3 i{font:400 1.7rem/1 var(--display);color:var(--gilt-lo);font-style:normal}
.opts{display:grid;gap:8px}
.opt{display:block;cursor:pointer}
.opt input{position:absolute;opacity:0}
.opt span{display:flex;align-items:center;gap:12px;padding:9px 12px;border:1px solid var(--rule);border-radius:8px;font-size:.9rem;font-weight:500;background:var(--paper);transition:.15s}
.opt span svg{width:58px;height:34px;flex:none;color:var(--ink-2)}
.opt:hover span{border-color:var(--rule-2)}
.opt input:checked+span{border-color:var(--red);background:var(--red-wash);box-shadow:inset 0 0 0 1px var(--red)}
.opt input:focus-visible+span{outline:2px solid var(--gilt);outline-offset:2px}
.ident-out{grid-column:1/-1;background:var(--japan);color:var(--on-dark);border-radius:var(--r-lg);padding:26px 28px}
.ident-out h4{font:400 1.5rem var(--display);color:#fff;margin-bottom:16px}
.ident-res{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.ident-res a{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:12px 14px;border:1px solid var(--japan-line);border-radius:8px;color:#fff!important;text-decoration:none;font-weight:600;font-size:.93rem}
.ident-res a span{font-weight:400;font-size:.8rem;color:var(--on-dark-2)}
.ident-res a:hover{border-color:var(--gilt);background:rgba(255,255,255,.03)}
.ident-actions{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px;font:italic 400 .92rem var(--serif);color:var(--on-dark-2)}
.ident-actions button{font:600 .85rem var(--sans);background:none;border:1px solid var(--japan-line);color:var(--on-dark);padding:8px 14px;border-radius:6px;cursor:pointer}
.ident-actions button:hover{border-color:var(--gilt)}

/* bobbin grid on dark */
.bob-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.bob-grid a{display:flex;flex-direction:column;gap:4px;padding:22px;border:1px solid var(--japan-line);border-radius:var(--r-lg);text-decoration:none;background:rgba(255,255,255,.02)}
.bob-grid a:hover{border-color:var(--gilt);background:rgba(255,255,255,.04)}
.bob-grid .art{height:58px;color:var(--gilt);margin-bottom:10px}
.bob-grid .art svg{height:58px;width:auto}
.bob-grid b{font:700 1.08rem var(--serif);color:#f8f1e2}
.bob-grid span:last-child{font-size:.86rem;color:var(--on-dark-2)}

/* ---------- care / glossary / features grids */
.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px}
.note{padding:22px 0;border-top:1px solid var(--rule)}
.note h3{font-size:1.1rem;margin-bottom:6px}
.note p{margin:0;color:var(--ink-2);font-size:.95rem}
.dark .note{border-color:var(--japan-line)}
.notes.c2{grid-template-columns:repeat(2,1fr)}
.glossary{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;margin:0}
.glossary div{padding:14px 0;border-top:1px solid var(--rule)}
.glossary dt{font:700 1.02rem var(--serif);margin-bottom:2px}
.glossary dd{margin:0;color:var(--ink-2);font-size:.95rem}

/* ---------- FAQ */
.faq{border-top:1px solid var(--ink)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;font:700 1.12rem/1.35 var(--serif);color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:12px;height:12px;background:linear-gradient(currentColor,currentColor) center/12px 1.5px no-repeat,linear-gradient(currentColor,currentColor) center/1.5px 12px no-repeat;color:var(--red);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details>div{padding:0 40px 22px 0;color:var(--ink-2)}
.faq details>div p{margin:0}
.faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:64px;align-items:start}
.faq-grid .sec-head{position:sticky;top:110px}

/* ---------- CTA */
.cta-band{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;padding:64px 70px;border-radius:var(--r-lg);overflow:hidden}
.cta-band h2{font-size:clamp(1.9rem,3.4vw,2.8rem);margin:0 0 12px}
.cta-band p{margin:0;font:400 1.1rem var(--serif)}
.cta-band form{display:flex;gap:8px;background:#0f0d0a;border:1px solid rgba(200,161,91,.3);border-radius:8px;padding:6px}
.cta-band form input{flex:1;min-width:0;background:none;border:0;outline:0;color:#fff;font:500 1.15rem var(--mono);letter-spacing:.08em;padding:10px 12px;text-transform:uppercase}
.cta-band form input::placeholder{color:#5c5246}

/* ---------- tables & toolbar */
.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:16px}
.fchip{font:500 .84rem var(--sans);padding:8px 14px;border-radius:999px;border:1px solid var(--rule-2);background:var(--card);color:var(--ink-2);cursor:pointer}
.fchip[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.search{margin-left:auto;display:flex;align-items:center;gap:8px;border:1px solid var(--rule-2);border-radius:999px;padding:0 14px;background:var(--card)}
.search svg{width:16px;height:16px;color:var(--muted)}
.search input{border:0;outline:0;background:none;font:500 .9rem var(--mono);padding:10px 0;width:200px;text-transform:uppercase}
.count{font:italic 400 .92rem var(--serif);color:var(--muted);margin:0 0 10px}
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);margin-bottom:22px}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th{text-align:left;font:600 .78rem var(--sans);color:var(--muted);padding:14px 16px;border-bottom:1px solid var(--ink);background:var(--paper);white-space:nowrap}
td{padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:middle}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:#f7f3ea}
td.num{white-space:nowrap}
td a{font-weight:500}
.bar-mini{position:relative;height:6px;background:var(--paper-2);border-radius:3px;min-width:140px}
.bar-mini i{position:absolute;top:0;bottom:0;background:var(--red);border-radius:3px}
.coverage{display:inline-flex;align-items:center;gap:6px;font:600 .74rem var(--sans);padding:4px 9px;border-radius:999px;white-space:nowrap}
.coverage::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
.coverage.full{background:#e5efe7;color:var(--green)}
.coverage.part{background:#f6ecd6;color:var(--amber)}
.coverage.none{background:var(--paper-2);color:var(--muted)}

/* decade chart */
.decades{display:grid;grid-template-columns:repeat(var(--n,12),1fr);gap:8px;align-items:end;height:220px;padding:0 0 30px;position:relative;border-bottom:1px solid var(--ink)}
.decades .col{position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}
.decades .col i{display:block;width:100%;max-width:44px;background:var(--japan);border-radius:3px 3px 0 0;position:relative}
.decades .col b{font:600 .82rem var(--sans);margin-bottom:6px}
.decades .col span{position:absolute;bottom:-26px;font-size:.76rem;color:var(--muted);white-space:nowrap}

/* serial anatomy */
.serial-anatomy{display:flex;justify-content:center;gap:4px;margin:0 0 28px}
.serial-anatomy .part{text-align:center}
.serial-anatomy .part b{display:block;font:500 clamp(2.4rem,6vw,4.4rem)/1 var(--mono);letter-spacing:.12em;padding:18px 18px;background:var(--japan);color:#f1e6cc;border-radius:6px;box-shadow:inset 0 3px 8px rgba(0,0,0,.6)}
.serial-anatomy .part.p b{color:var(--gilt-hi)}
.serial-anatomy .part span{display:block;margin-top:12px;font:italic 400 .98rem var(--serif);color:var(--ink-2)}

/* ---------- article layout */
.wrap.wide{max-width:1320px}
.article{display:grid;grid-template-columns:210px minmax(0,1fr) 300px;gap:52px;align-items:start}
.toc{position:sticky;top:110px;font-size:.88rem}
.toc h4{font:italic 400 1rem var(--serif);color:var(--muted);margin-bottom:12px}
.toc ol{list-style:none;padding:0;margin:0;border-left:1px solid var(--rule)}
.toc li{margin:0}
.toc a{display:block;padding:6px 0 6px 16px;margin-left:-1px;border-left:2px solid transparent;color:var(--ink-2);text-decoration:none;line-height:1.35}
.toc a:hover{color:var(--ink)}
.toc a.active{border-left-color:var(--red);color:var(--ink);font-weight:600}
.prose{font:400 1.08rem/1.75 var(--serif);color:var(--ink)}
.prose>h2{font-size:clamp(1.8rem,3vw,2.4rem);margin:64px 0 20px;scroll-margin-top:100px}
.prose>h2:first-child{margin-top:0}
.prose h2 .h-num{display:block;font:italic 400 1rem var(--serif);color:var(--gilt-lo);margin-bottom:8px;letter-spacing:0}
.prose h3{margin:28px 0 8px;font-size:1.2rem}
.prose ul,.prose ol{padding-left:1.25em}
.prose li{margin:.45em 0}
.prose .dropcap::first-letter{float:left;font:400 4.2rem/.82 var(--display);color:var(--red);margin:6px 10px 0 0}
.prose .table-wrap,.prose .callout,.prose .figure,.prose .faq,.prose .checklist{font-family:var(--sans);font-size:1rem;line-height:1.65}
.prose .story p{font-size:1.12rem}
.aside-stack{position:sticky;top:110px;display:grid;gap:18px}
.side-card{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:20px}
.side-card h3{font-size:1.08rem;margin-bottom:10px}
.side-card p{font-size:.9rem;color:var(--ink-2)}
.side-card ul{list-style:none;padding:0;margin:0}
.side-card li{margin:0;border-top:1px solid var(--rule)}
.side-card li a{display:flex;justify-content:space-between;gap:10px;padding:10px 0;font-size:.9rem;font-weight:500;color:var(--ink);text-decoration:none}
.side-card li a span{color:var(--muted);font-weight:400;font-size:.8rem;white-space:nowrap}
.side-card li a:hover{color:var(--red)}
.side-card.dark-card{background:var(--japan);border-color:var(--japan);color:var(--on-dark)}
.side-card.dark-card h3{color:#fff}
.side-card.dark-card p{color:var(--on-dark-2)}
.side-card .field input{font-size:1.05rem;padding:8px 10px}

/* specification plate: nickel-edged, japanned */
.plate{position:relative;background:linear-gradient(180deg,#221c16,#16130f);border-radius:12px;padding:30px 34px 26px;color:var(--on-dark);box-shadow:0 0 0 1px #3a3128,0 0 0 5px #8e8a84,0 0 0 6px #5d5a55,var(--lift-dark);margin:6px}
.plate::before{content:"";position:absolute;inset:12px;border:1px solid rgba(200,161,91,.45);border-radius:5px;pointer-events:none}
.plate .screw{position:absolute;width:10px;height:10px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#e8e4dc,#8a857d 60%,#4d4943);box-shadow:0 1px 1px rgba(0,0,0,.6)}
.plate .screw::after{content:"";position:absolute;left:1px;right:1px;top:4.5px;height:1px;background:#3b3833;transform:rotate(35deg)}
.plate .s1{top:7px;left:7px}.plate .s2{top:7px;right:7px}.plate .s3{bottom:7px;left:7px}.plate .s4{bottom:7px;right:7px}
.plate h2{font:italic 400 1.1rem var(--serif)!important;color:var(--gilt)!important;margin:0 0 10px!important;text-align:center}
.plate dl{margin:0;display:grid;grid-template-columns:150px 1fr;font-family:var(--sans);font-size:.95rem;line-height:1.55}
.plate dt{padding:12px 16px 12px 0;color:var(--gilt);font:600 .78rem/1.6 var(--sans);border-top:1px solid rgba(200,161,91,.16)}
.plate dd{margin:0;padding:12px 0;border-top:1px solid rgba(200,161,91,.16);color:#efe5d0}
.plate .tag{margin-left:6px}

/* feature list with markers */
.features{display:grid;grid-template-columns:1fr 1fr;gap:0 36px;font-family:var(--sans);margin:0 0 1em}
.feature{display:grid;grid-template-columns:28px 1fr;gap:12px;padding:16px 0;border-top:1px solid var(--rule)}
.feature .mk{width:22px;height:22px;margin-top:3px;border:1.5px solid var(--red);border-radius:50%;position:relative}
.feature .mk::after{content:"";position:absolute;inset:6px;background:var(--red);border-radius:50%}
.feature b{display:block;font:600 1rem/1.35 var(--sans);margin-bottom:3px}
.feature p{margin:0;font-size:.95rem;line-height:1.6;color:var(--ink-2)}
.variants td:first-child{font:500 .92rem var(--mono);white-space:nowrap}
.kit{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;font-family:var(--sans);margin:0 0 1em}
.kit div{background:var(--card);border:1px solid var(--rule);border-radius:var(--r);padding:16px 18px}
.kit b{display:block;font:700 1.02rem var(--serif);margin-bottom:4px}
.kit p{margin:0;font-size:.92rem;line-height:1.6;color:var(--ink-2)}

/* tiles (bobbins, decals) */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;margin:0 0 1.4em;font-family:var(--sans)}
.tile{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:20px}
.tile .tile-art{height:66px;color:var(--ink);margin-bottom:12px}
.tile .tile-art svg{height:66px;width:auto}
.tile h4{font:700 1.04rem var(--serif);margin-bottom:6px}
.tile p{margin:0 0 8px;font-size:.9rem;line-height:1.55;color:var(--ink-2)}
.tile .models{font-size:.8rem;color:var(--muted);border-top:1px solid var(--rule);padding-top:8px;margin-top:auto}
.tile.decal{background:var(--japan);border-color:var(--japan);color:var(--on-dark)}
.tile.decal h4{color:#fff}
.tile.decal p{color:var(--on-dark-2)}
.tile.decal .yr{font:italic 400 .9rem var(--serif);color:var(--gilt);margin:0 0 6px}
.tile.decal .models{border-color:var(--japan-line);color:var(--on-dark-2)}
.decal-orn{height:46px;color:var(--gilt);margin-bottom:10px}
.decal-orn svg{height:46px;width:auto}

/* eras */
.eras{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);font-family:var(--sans)}
.era{padding:22px 18px 4px 0}
.era+.era{padding-left:18px;border-left:1px solid var(--rule)}
.era .yrs{font:400 1.5rem/1.1 var(--display);color:var(--red);margin-bottom:8px}
.era h3{font-size:1.05rem;margin-bottom:8px}
.era p{font-size:.9rem;line-height:1.6;color:var(--ink-2)}
.eras.wide .era{padding-top:28px}
.eras.wide .era .yrs{font-size:2rem}

/* factors */
.factors{display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px}
.factor{padding:24px 0;border-top:1px solid var(--rule)}
.factor h3{font-size:1.15rem;margin:10px 0 6px}
.factor p{margin:0;color:var(--ink-2);font-size:.95rem}
.factor .lbl{font:italic 400 .88rem var(--serif);color:var(--muted)}
.impact{display:flex;gap:4px;margin-top:6px}
.impact i{width:24px;height:5px;border-radius:2px;background:var(--paper-3)}
.impact i.on{background:var(--red)}

/* tool */
.tool{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:26px;box-shadow:var(--lift)}
.tool-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr auto;gap:14px;align-items:end}
.tool label,.form label{display:block;font:600 .78rem var(--sans);color:var(--muted);margin-bottom:6px}
.tool select,.tool input,.form input,.form select,.form textarea{width:100%;font:500 .95rem var(--sans);color:var(--ink);background:var(--paper);border:1px solid var(--rule-2);border-radius:6px;padding:12px 12px}
.tool select:focus,.tool input:focus,.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--gilt);outline-offset:1px}

/* checklist */
.checklist{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--lift)}
.checklist-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 22px;background:var(--japan);color:#fff}
.checklist-head h3{color:#fff;font-size:1.1rem}
.progress{flex:1;max-width:240px;height:6px;border-radius:3px;background:rgba(255,255,255,.12);overflow:hidden}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gilt),var(--gilt-hi));transition:width .3s}
.checklist label{display:flex;gap:14px;padding:15px 22px;border-top:1px solid var(--rule);cursor:pointer;align-items:flex-start}
.checklist label:first-of-type{border-top:0}
.checklist label:hover{background:#f8f5ee}
.checklist input{appearance:none;flex:none;width:20px;height:20px;border:1.5px solid var(--rule-2);border-radius:4px;margin-top:3px;display:grid;place-items:center;cursor:pointer;background:var(--paper)}
.checklist input:checked{background:var(--red);border-color:var(--red)}
.checklist input:checked::after{content:"";width:9px;height:5px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg) translate(1px,-1px)}
.checklist b{display:block;font:600 .98rem var(--sans)}
.checklist small{display:block;color:var(--ink-2);font-size:.9rem;line-height:1.55}
.checklist-foot{padding:14px 22px;border-top:1px solid var(--rule);font:italic 400 .95rem var(--serif);color:var(--muted);background:var(--paper)}

/* references */
.refs{list-style:none;padding:0;margin:0;counter-reset:r;font-family:var(--sans);font-size:.88rem}
.refs li{counter-increment:r;display:grid;grid-template-columns:30px 1fr;gap:8px;padding:9px 0;border-top:1px solid var(--rule);margin:0;word-break:break-word}
.refs li::before{content:counter(r);font:600 .75rem var(--sans);color:var(--muted);padding-top:2px}
.refs a{color:var(--ink-2);text-decoration:none}
.refs a:hover{color:var(--red);text-decoration:underline}
.updated{display:inline-flex;align-items:center;gap:8px;font:italic 400 .9rem var(--serif);color:var(--muted)}
.updated::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}

/* source cards */
.src-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.src{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:24px}
.src h3{font-size:1.15rem;margin-bottom:4px}
.src .role{font:italic 400 .92rem var(--serif);color:var(--red);margin-bottom:10px;display:block}
.src p{margin:0 0 12px;color:var(--ink-2);font-size:.95rem}
.cov-bar{display:flex;height:16px;border-radius:4px;overflow:hidden;margin:18px 0 10px}
.cov-bar i{display:block}
.cov-legend{display:flex;flex-wrap:wrap;gap:18px;font-size:.85rem;color:var(--ink-2)}
.cov-legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:7px;background:var(--c);vertical-align:-1px}

/* contact form */
.form{display:grid;gap:16px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form textarea{min-height:150px;resize:vertical;font-family:var(--sans)}
.form .hint{font:italic 400 .9rem var(--serif);color:var(--muted);margin:0}

/* quotes from the record — pull quote */
.pull{margin:40px 0;padding:6px 0 6px 28px;border-left:2px solid var(--gilt);font:italic 400 1.35rem/1.5 var(--serif);color:var(--ink)}
.pull cite{display:block;margin-top:10px;font:500 .85rem var(--sans);font-style:normal;color:var(--muted)}

/* divider ornament */
.orn-divider{display:flex;justify-content:center;color:var(--gilt);margin:0 auto 46px;max-width:260px}
.orn-divider svg{width:100%;height:auto}

/* ---------- footer */
.site-footer{padding:84px 0 36px;color:var(--on-dark-2)}
.foot-top{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;padding-bottom:42px;margin-bottom:48px;border-bottom:1px solid var(--japan-line)}
.foot-top h2{font-size:clamp(1.8rem,3vw,2.5rem);color:#f8f1e2;max-width:560px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand p{font-size:.92rem;margin-top:16px;max-width:320px}
.site-footer h4{font:italic 400 1rem var(--serif);color:var(--gilt);margin-bottom:14px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0 0 8px}
.site-footer a:not(.btn){color:#ddd3bf;text-decoration:none;font-size:.93rem}
.site-footer a:not(.btn):hover{color:#fff}
.foot-bottom{display:flex;justify-content:space-between;gap:30px;margin-top:56px;padding-top:24px;border-top:1px solid var(--japan-line);font-size:.8rem;line-height:1.6}
.foot-bottom p{margin:0;max-width:760px}
.to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:var(--japan);border:1px solid var(--gilt);color:var(--gilt-hi);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transition:.2s;z-index:40}
.to-top svg{width:18px;height:18px}
.to-top.show{opacity:1;visibility:visible}

/* ---------- 404 */
.nf{text-align:center;padding:40px 0 20px}
.nf .big{font:400 clamp(6rem,18vw,12rem)/1 var(--display);color:var(--gilt);margin-bottom:10px}

/* ---------- responsive */
@media (max-width:1180px){
  .article{grid-template-columns:minmax(0,1fr) 290px}
  .toc{display:none}
}
@media (max-width:1020px){
  .nav{position:absolute;top:76px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--japan);padding:12px 20px 22px;border-bottom:1px solid var(--japan-line);display:none;max-height:calc(100vh - 76px);overflow:auto}
  .nav.open{display:flex}
  .menu-btn{display:block}
  .nav>a,.nav .dd>button{padding:13px 8px;font-size:1rem;width:100%;justify-content:space-between}
  .dd-menu{position:static;transform:none!important;width:auto;opacity:1;visibility:visible;display:none;grid-template-columns:1fr;margin:4px 0 8px;box-shadow:none}
  .dd.open .dd-menu{display:grid}
  .dd:hover .dd-menu{display:none}
  .dd.open:hover .dd-menu{display:grid}
  .header-cta{margin:10px 0 0}
  .hero-grid,.page-hero .hero-grid,.split,.anatomy,.margin-layout,.faq-grid{grid-template-columns:1fr;gap:44px}
  .margin-layout>.sec-head,.faq-grid .sec-head{position:static}
  .hero-art{max-width:560px}
  .page-hero .hero-art{display:none}
  .c3,.c4,.notes,.factors{grid-template-columns:1fr 1fr}
  .families,.eras{grid-template-columns:1fr 1fr}
  .family:nth-child(3),.era:nth-child(3){border-left:0;padding-left:0}
  .ident{grid-template-columns:1fr 1fr}
  .reg-row{grid-template-columns:1fr 1fr}
  .reg-row .reg-desc{grid-column:1/-1}
  .cta-band{grid-template-columns:1fr;padding:52px 44px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .tool-grid{grid-template-columns:1fr 1fr}
  .article{grid-template-columns:1fr}
  .aside-stack{position:static;grid-template-columns:1fr 1fr}
  .history{grid-template-columns:1fr;gap:0}
  .history::before{left:6px}
  .mile{padding-left:36px}
  .mile:nth-child(even){transform:none}
  .mile::after,.mile:nth-child(odd)::after,.mile:nth-child(even)::after{left:2px;right:auto}
  .history-foot{margin-top:20px}
  .steps.c4{grid-template-columns:1fr 1fr}
  .steps.c4 .step:nth-child(3){border-left:0;padding-left:0}
}
@media (max-width:720px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .section{padding:76px 0}
  .section.tight{padding:52px 0}
  .hero{padding:16px 0 0}
  .hero-frame,.page-hero .hero-frame{padding:48px 22px 40px}
  .pinstripe::before{inset:8px}
  .pinstripe::after{inset:12px}
  .hero-stats,.highlights{grid-template-columns:1fr 1fr}
  .hero-stats div,.highlights div{padding:18px 14px 10px}
  .hero-stats div:nth-child(3),.highlights div:nth-child(3){border-left:0;padding-left:0}
  .hero-stats div:nth-child(n+3),.highlights div:nth-child(n+3){border-top:1px solid var(--japan-line)}
  .hero-stats b{font-size:2rem}
  .steps,.steps.c4{grid-template-columns:1fr;border-top:0}
  .step,.step+.step,.steps.c4 .step:nth-child(3){padding:22px 0;border-left:0;border-top:1px solid var(--ink)}
  .c2,.c3,.c4,.notes,.notes.c2,.factors,.glossary,.features,.kit,.src-list,.form .row{grid-template-columns:1fr}
  .families,.eras{grid-template-columns:1fr}
  .family,.era,.era+.era{border-left:0;padding-left:0;border-top:1px solid var(--rule)}
  .ident{grid-template-columns:1fr}
  .reg-row{grid-template-columns:1fr;gap:12px}
  .tool-grid{grid-template-columns:1fr}
  .aside-stack{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-brand{grid-column:1/-1}
  .foot-top{flex-direction:column;align-items:flex-start}
  .foot-bottom{flex-direction:column}
  .search{margin-left:0;width:100%}
  .search input{width:100%}
  .cert{padding:20px 16px}
  .cert::before{left:30px}
  .cert-head,.cert-grid{padding-left:26px}
  .cert-models,.cert-note,.cert-actions{margin-left:26px}
  .cert-grid{grid-template-columns:1fr}
  .seal{width:74px;height:74px;font-size:.52rem}
  .cta-band{padding:44px 22px}
  .cta-band form{flex-direction:column}
  .plate{padding:26px 20px 20px}
  .plate dl{grid-template-columns:1fr}
  .plate dt{padding-bottom:0}
  .plate dd{border-top:0;padding-top:4px}
  .specimen{grid-template-columns:1fr;gap:12px}
  .serial-anatomy .part b{padding:12px 8px;font-size:1.9rem;letter-spacing:.06em}
  .split>*,.hero-grid>*,.margin-layout>*,.faq-grid>*,.anatomy>*{min-width:0}
  .hero h1{font-size:2.9rem}
  .decades{gap:4px}
  .decades .col span{font-size:.62rem;transform:rotate(-40deg);transform-origin:center}
  .decades .col b{font-size:.7rem}
  .field input{font-size:1.2rem}
  .examples{gap:6px}
  .dd-menu a{grid-template-columns:36px 1fr}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
  .js .draw path,.js .draw circle,.js .draw rect,.js .draw ellipse{stroke-dashoffset:0!important}
}
@media print{.site-header,.site-footer,.to-top,.toc,.aside-stack{display:none}.dark{background:#fff;color:#000}}
/* light ledger card inside dark sections */
.dark .cert a:not(.btn){color:var(--ink)}
.dark .cert .cert-models a{color:var(--ink)}
.dark .cert .btn-ghost{color:var(--ink);border-color:var(--rule-2)}
.dark .cert .btn-ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--ink-2)}
.dark .cert p,.dark .cert code{color:var(--ink-2)}