/* v8b.info — Rebuild sheet. Machined aluminium ground, Dykem-blued marking-out plates, cast-iron bench, copper gasket, redline. */
:root{
  --bg:#E6E5E0;--sheet:#F5F4F0;--card:#FBFAF7;--ink:#14171A;--ink-2:#434B52;--muted:#565F67;
  --rule:#CBCCC6;--rule-2:#A7AAA5;
  --iron:#16191C;--iron-2:#1F2327;--iron-3:#2A2F34;--iron-t:#C9CED2;--iron-m:#8E979E;
  --dykem:#1E3FA6;--dykem-2:#142C78;--dykem-3:#3158CC;--dykem-l:#D6DEF6;--dykem-t:#E7ECFB;
  --copper:#B5602C;--copper-t:#8C4315;--copper-l:#E3A06E;
  --red:#CF2E26;--red-2:#A3201A;--amber:#E9A83A;--ok:#2F8A5B;
  --f-disp:"Rajdhani","Hind Siliguri","Noto Sans Bengali",sans-serif;
  --f-body:"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif;
  --r:10px;--hd:68px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hd) + 14px)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.7 var(--f-body);
  background-image:repeating-linear-gradient(90deg,rgba(20,23,26,.018) 0 1px,transparent 1px 3px);overflow-x:clip}
:lang(bn) body,body.lang-bn{line-height:1.8}
img,svg{max-width:100%}
a{color:var(--dykem);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--dykem-2);text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:4px}
.wrap{width:100%;max-width:1240px;margin-inline:auto;padding-inline:16px}
@media (min-width:768px){.wrap{padding-inline:28px}}
@media (min-width:1200px){.wrap{padding-inline:40px}}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--amber);color:var(--iron);padding:12px 16px;font-weight:700;border-radius:6px;text-decoration:none}
.skip:focus{top:10px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 20px;border-radius:8px;
  font:700 16px/1.2 var(--f-body);text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .15s,background .15s,box-shadow .15s}
:lang(en) .btn{font:700 17px/1.1 var(--f-disp);letter-spacing:.04em;text-transform:uppercase}
.btn-red{background:var(--red);color:#fff;box-shadow:inset 0 -3px 0 var(--red-2),0 1px 0 rgba(0,0,0,.12)}
.btn-red:hover{background:#DA3A31;color:#fff}
.btn-red:active{transform:translateY(1px);box-shadow:inset 0 -1px 0 var(--red-2)}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:var(--ink);color:#fff}

/* ---------- top strip ---------- */
.strip{background:var(--iron);color:var(--iron-t);font-size:14px}
.strip-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}
.indep{margin:0;line-height:1.4;display:flex;align-items:center;gap:10px}
.indep::before{content:"";width:22px;height:2px;background:var(--copper-l);flex:none}
@media (max-width:560px){.indep{display:none}.strip-in{justify-content:flex-end}}
.lsw{display:flex;gap:4px}
.lsw a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;color:var(--iron-t);text-decoration:none;font-weight:600;border-bottom:2px solid transparent}
.lsw a[aria-current]{color:#fff;border-bottom-color:var(--copper-l)}
.lsw a:hover{color:#fff}

/* ---------- header ---------- */
.hd{position:sticky;top:0;z-index:50;background:var(--sheet);border-bottom:1px solid var(--rule-2);box-shadow:0 1px 0 #fff inset,0 6px 18px -14px rgba(20,23,26,.5)}
.hd-in{display:flex;align-items:center;gap:14px;min-height:var(--hd)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;min-height:48px;margin-right:auto}
.brand:hover{color:var(--ink)}
.mk{width:44px;height:36px;color:var(--ink);flex:none}
.wm{font:700 32px/1 var(--f-disp);letter-spacing:.01em}
.tag{font:600 13px/1 var(--f-body);color:var(--muted);padding-left:10px;border-left:1px solid var(--rule-2)}
:lang(en) .tag{font:700 13px/1 var(--f-disp);text-transform:uppercase;letter-spacing:.14em}
.nav-toggle{display:inline-flex;align-items:center;gap:10px;min-height:48px;min-width:48px;padding:0 14px 0 12px;border:1.5px solid var(--ink);border-radius:8px;background:transparent;color:var(--ink);font:600 15px/1 var(--f-body);cursor:pointer}
.vb{position:relative;width:22px;height:18px}
.vb i{position:absolute;left:50%;bottom:1px;width:3px;height:19px;margin-left:-1.5px;background:currentColor;border-radius:2px;transform-origin:50% 100%;transition:transform .25s,bottom .25s}
.vb i:first-child{transform:rotate(-32deg)}.vb i:last-child{transform:rotate(32deg)}
.nav-toggle[aria-expanded=true] .vb i{transform-origin:50% 50%;bottom:0}
.nav-toggle[aria-expanded=true] .vb i:first-child{transform:rotate(-45deg)}.nav-toggle[aria-expanded=true] .vb i:last-child{transform:rotate(45deg)}
@media (max-width:380px){.tl{display:none}.tag{display:none}}
.hd-cta{display:none}
@media (min-width:640px){.hd-cta{display:inline-flex;min-height:46px;padding:8px 16px}}
.snav ol{list-style:none;margin:0;padding:0}
.snav a{text-decoration:none;color:inherit}
.nn{font:700 14px/1 var(--f-disp)}
@media (max-width:1099.98px){
  .snav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--iron);color:#fff;border-top:3px solid var(--copper);box-shadow:0 24px 40px -20px rgba(0,0,0,.6);max-height:calc(100vh - 120px);overflow:auto}
  .hd.open .snav{display:block;animation:drawer .22s ease-out}
  .snav ol{max-width:1240px;margin:0 auto;padding:8px 16px 16px}
  .snav li+li{border-top:1px solid rgba(255,255,255,.1)}
  .snav a{display:flex;align-items:center;gap:14px;min-height:56px;font-size:18px;font-weight:500}
  .snav a:hover,.snav a[aria-current]{color:var(--copper-l)}
  .nn{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;flex:none;background:radial-gradient(circle,var(--iron) 0 52%,var(--copper-l) 54% 62%,var(--iron-3) 64%);color:#fff}
  .snav a[aria-current] .nn{background:radial-gradient(circle,var(--copper) 0 62%,var(--iron-3) 64%)}
}
@keyframes drawer{from{transform:translateY(-8px);opacity:.4}to{transform:none;opacity:1}}
@media (min-width:1100px){
  .nav-toggle{display:none}
  .hd-in{gap:22px}
  .snav ol{display:flex;gap:4px}
  .snav a{display:flex;align-items:center;gap:8px;min-height:48px;padding:0 10px;font-weight:500;font-size:16px;color:var(--ink-2);border-bottom:3px solid transparent;margin-bottom:-3px}
  :lang(en) .snav a{font:600 18px/1 var(--f-disp)}
  .snav a:hover{color:var(--ink)}
  .snav a[aria-current]{color:var(--ink);border-bottom-color:var(--copper)}
  .nn{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12.5px;color:var(--ink-2);box-shadow:inset 0 0 0 1.5px var(--rule-2)}
  .snav a[aria-current] .nn{background:var(--copper);color:#fff;box-shadow:none}
}

/* ---------- Dykem plate (blued steel with scribed layout lines) ---------- */
.plate{position:relative;color:#fff;background:
  linear-gradient(118deg,transparent 0 62%,rgba(255,255,255,.28) 62.05%,transparent 62.2%),
  linear-gradient(28deg,transparent 0 30%,rgba(255,255,255,.16) 30.05%,transparent 30.2%),
  repeating-linear-gradient(0deg,rgba(255,255,255,.07) 0 1px,transparent 1px 40px),
  repeating-linear-gradient(90deg,rgba(255,255,255,.07) 0 1px,transparent 1px 40px),
  radial-gradient(60% 80% at 85% 20%,rgba(255,255,255,.08),transparent 70%),
  radial-gradient(120% 120% at 10% 0%,var(--dykem-3),var(--dykem) 45%,var(--dykem-2))}
.plate::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 24px 24px,rgba(255,255,255,.55) 0 2px,transparent 2.5px),radial-gradient(circle at calc(100% - 24px) calc(100% - 24px),rgba(255,255,255,.55) 0 2px,transparent 2.5px)}

/* deck drawing */
.deck{display:block;width:100%;height:auto;font:700 26px var(--f-disp)}
.deck .blk{fill:rgba(10,20,60,.28);stroke:rgba(255,255,255,.85);stroke-width:1.6}
.deck .axis{stroke:rgba(255,255,255,.55);stroke-width:1;stroke-dasharray:14 4 3 4}
.deck .dim{stroke:rgba(255,255,255,.6);stroke-width:1;fill:none}
.deck .liner{fill:rgba(8,16,48,.35);stroke:#fff;stroke-width:1.6}
.deck .fire{fill:var(--copper-l);opacity:0;animation:fire 4s linear infinite;animation-delay:var(--d)}
.deck .bolt{fill:none;stroke:rgba(255,255,255,.7);stroke-width:1.3}
.deck text{fill:#fff}
@keyframes fire{0%{opacity:.95}10%{opacity:.35}22%,100%{opacity:0}}
@media (prefers-reduced-motion:reduce){.deck .fire{animation:none;opacity:0}.deck .bore:first-of-type .fire{opacity:.8}}

/* ---------- home hero ---------- */
.hero{padding:26px 0 34px;background:linear-gradient(180deg,var(--sheet),var(--bg))}
.hero-g{display:grid;gap:26px}
.dimline{display:flex;align-items:center;gap:10px;margin:0 0 14px;color:var(--copper-t);font-weight:600;font-size:15px;line-height:1.4}
:lang(en) .dimline{font:700 14px/1.2 var(--f-disp);letter-spacing:.12em;text-transform:uppercase}
.dimline::before,.dimline::after{content:"";flex:1 1 20px;min-width:18px;height:9px;background:linear-gradient(currentColor,currentColor) center/100% 1px no-repeat}
.dimline::before{max-width:48px;border-left:1.5px solid currentColor}
.dimline::after{border-right:1.5px solid currentColor}
.hero h1{margin:0 0 16px;font:700 clamp(2.35rem,1.4rem + 4.4vw,4.6rem)/.98 var(--f-disp);letter-spacing:-.005em;text-wrap:balance}
:lang(en) .hero h1{text-transform:uppercase}
:lang(bn) .hero h1{font:700 clamp(2rem,1.3rem + 3.2vw,3.5rem)/1.32 "Hind Siliguri","Noto Sans Bengali",sans-serif}
.lead{font-size:1.1rem;color:var(--ink-2);max-width:62ch}
.lead p{margin:0 0 .6em}
.acts{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 20px}
.tags{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.tags li{position:relative;padding:7px 14px 7px 30px;font-size:14.5px;font-weight:600;line-height:1.4;color:var(--ink-2);
  background:linear-gradient(180deg,#F3F4F4,#D9DCDE);border:1px solid #B5BABD;border-radius:4px 16px 16px 4px;box-shadow:inset 0 1px 0 #fff}
.tags li::before{content:"";position:absolute;left:10px;top:50%;width:10px;height:10px;margin-top:-5px;border-radius:50%;background:var(--bg);box-shadow:inset 0 1px 2px rgba(0,0,0,.45)}
.plate-hero{margin:0;border-radius:14px;padding:18px 18px 14px;box-shadow:0 22px 40px -26px rgba(20,44,120,.7),inset 0 0 0 1px rgba(255,255,255,.12);overflow:hidden}
.plate-hero figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-top:6px;padding-top:10px;border-top:1px solid rgba(255,255,255,.35);font-size:14px;color:var(--dykem-t)}
.plate-hero figcaption b{font:700 20px/1 var(--f-disp);letter-spacing:.08em;color:#fff}
@media (max-width:599px){.plate-hero{padding:12px}.plate-hero .deck{max-height:210px}}
@media (min-width:980px){
  .hero{padding:48px 0 60px}
  .hero-g{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
}

/* ---------- test bench (game) ---------- */
.bench{position:relative;background:var(--iron);color:var(--iron-t);padding:40px 0 48px;
  background-image:linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px}
.bench::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:repeating-linear-gradient(90deg,var(--copper) 0 26px,var(--iron) 26px 30px)}
.bench-g{display:grid;gap:26px}
.kick{margin:0 0 6px;color:var(--copper-l);font-weight:600;font-size:15px}
:lang(en) .kick{font:700 14px/1.2 var(--f-disp);letter-spacing:.16em;text-transform:uppercase}
.bench h2{margin:0 0 10px;color:#fff;font:700 clamp(1.8rem,1.3rem + 2vw,2.6rem)/1.1 var(--f-disp)}
:lang(bn) .bench h2{font:700 clamp(1.6rem,1.2rem + 1.6vw,2.2rem)/1.4 "Hind Siliguri",sans-serif}
.bench-p{margin:0 0 18px;max-width:40ch}
.tach-w{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center}
.tach{width:120px;height:120px;font:700 17px var(--f-disp)}
.t-bez{fill:var(--iron-3);stroke:#56606A;stroke-width:3}
.t-face{fill:#0C0E10}
.t-red{fill:none;stroke:var(--red);stroke-width:8}
.t-maj{stroke:#E8EBED;stroke-width:3}.t-min{stroke:#7D868D;stroke-width:1.6}
.tach text{fill:#D9DDE0}
.needle{transform-box:view-box;transform-origin:100px 100px;transform:rotate(calc(var(--v,.8) * 30deg));transition:transform .7s cubic-bezier(.3,1.4,.5,1)}
.needle path{stroke:var(--amber);stroke-width:4;stroke-linecap:round}
.needle circle{fill:var(--iron-3);stroke:var(--amber);stroke-width:3}
.tach-w.idle .needle{animation:idle 2.6s ease-in-out infinite}
@keyframes idle{50%{transform:rotate(calc(var(--v,.8) * 30deg + 5deg))}}
.tach-n{margin:0;font-size:15px;line-height:1.5;color:var(--iron-m)}
.console{position:relative;min-width:0;background:linear-gradient(180deg,#3A4046,#23282C);border-radius:14px;padding:10px;box-shadow:0 30px 50px -30px #000,inset 0 1px 0 rgba(255,255,255,.18)}
.console::before,.console::after{content:"";position:absolute;top:14px;width:10px;height:10px;border-radius:50%;background:radial-gradient(circle at 40% 35%,#C7CDD2,#6D757C 70%);box-shadow:0 1px 0 rgba(0,0,0,.5)}
.console::before{left:12px}.console::after{right:12px}
.con-top{display:flex;align-items:center;gap:10px;padding:2px 22px 10px;font-size:14px;color:var(--iron-t);line-height:1.4}
.con-l{flex:1;min-width:0}
.led{width:9px;height:9px;border-radius:50%;background:#4ADE80;box-shadow:0 0 8px #4ADE80;flex:none}
.con-demo{font:700 13px/1 var(--f-disp);letter-spacing:.14em;text-transform:uppercase;color:var(--iron);background:var(--amber);padding:5px 8px;border-radius:4px}
:lang(bn) .con-demo{letter-spacing:0;font:700 13px/1 "Hind Siliguri",sans-serif}
#game-root{border-radius:8px;min-height:560px}
@media (max-width:479px){.bench .wrap{padding-inline:8px}.bench-side{padding-inline:8px}.console{padding:6px;border-radius:10px}.con-top{padding-inline:20px}}
@media (min-width:980px){
  .bench{padding:64px 0 72px}
  .bench-g{grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:48px;align-items:start}
  .bench-side{position:sticky;top:calc(var(--hd) + 24px)}
  .tach-w{grid-template-columns:1fr;max-width:260px}
  .tach{width:220px;height:220px}
}

/* ---------- sheet: article + rail ---------- */
.sheet{padding:36px 0 56px}
.sheet-g{display:grid;gap:28px;grid-template-columns:minmax(0,1fr)}
.rail{min-width:0}
.content{min-width:0;max-width:760px}
.toc-h{margin:0 0 8px;font-weight:600;font-size:14px;color:var(--muted)}
:lang(en) .toc-h{font:700 13px/1.2 var(--f-disp);letter-spacing:.16em;text-transform:uppercase}
.toc ol{list-style:none;margin:0;padding:0}
.toc a{display:flex;align-items:center;gap:12px;min-height:44px;text-decoration:none;color:var(--ink-2);font-size:15px;line-height:1.4}
.tn{width:30px;height:30px;flex:none;border-radius:50%;display:grid;place-items:center;font:700 14px/1 var(--f-disp);color:var(--ink);background:radial-gradient(circle,var(--card) 0 56%,var(--rule-2) 58% 66%,transparent 68%)}
.toc a:hover{color:var(--ink)}
.toc a[aria-current] {color:var(--ink);font-weight:600}
.toc a[aria-current] .tn{background:radial-gradient(circle,var(--copper) 0 66%,transparent 68%);color:#fff}
/* mobile: toc as scrollable strip */
@media (max-width:999.98px){
  .rail .toc{margin-inline:-16px;padding:12px 16px;background:var(--sheet);border-block:1px solid var(--rule)}
  .rail .toc ol{display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin;padding-bottom:4px}
  .rail .toc li{flex:none;max-width:78vw}
  .rail .toc a{padding:4px 14px 4px 6px;border:1px solid var(--rule);border-radius:999px;background:var(--card)}
  .rail .toc .tx{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .rail-r{order:-1}
  .rail-r .job{display:none}
}
@media (min-width:768px) and (max-width:999.98px){.rail .toc{margin-inline:-28px;padding-inline:28px}}
@media (min-width:1000px){
  .sheet{padding:56px 0 80px}
  .sheet-g{grid-template-columns:260px minmax(0,1fr);gap:56px}
  .sheet-in{grid-template-columns:minmax(0,1fr) 290px}
  .rail>.toc,.rail-s{position:sticky;top:calc(var(--hd) + 24px)}
  .toc ol{position:relative}
  .toc ol::before{content:"";position:absolute;left:14px;top:14px;bottom:14px;width:2px;background:repeating-linear-gradient(var(--rule-2) 0 6px,transparent 6px 9px)}
  .toc li{position:relative}
  .toc a{padding:4px 0}
  .rail-s{display:grid;gap:26px}
}
.page-home .content{max-width:780px}

/* content typography */
.content{counter-reset:cyl}
.content>p,.content li,.intro-extra p{max-width:70ch}
.content p{margin:0 0 1.05em}
.content h2[id]:not(.faq-h){counter-increment:cyl;position:relative;display:grid;grid-template-columns:54px minmax(0,1fr);gap:16px;align-items:center;
  margin:2.2em 0 .9em;padding-bottom:16px;font:700 clamp(1.6rem,1.25rem + 1.3vw,2.15rem)/1.12 var(--f-disp);
  background:repeating-linear-gradient(90deg,var(--ink-2) 0 1.5px,transparent 1.5px 40px) left bottom/100% 11px no-repeat,
    repeating-linear-gradient(90deg,var(--rule-2) 0 1px,transparent 1px 8px) left bottom/100% 6px no-repeat,
    linear-gradient(var(--rule-2),var(--rule-2)) left bottom/100% 1px no-repeat}
.content>h2[id]:first-child,.intro-extra+h2{margin-top:.4em}
:lang(bn) .content h2[id]:not(.faq-h){font:700 clamp(1.4rem,1.15rem + 1vw,1.85rem)/1.45 "Hind Siliguri",sans-serif}
.content h2[id]:not(.faq-h)::before{content:counter(cyl,decimal-leading-zero);width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
  font:700 21px/1 var(--f-disp);color:var(--ink);background:radial-gradient(circle,var(--card) 0 54%,var(--copper) 56% 63%,var(--iron) 65%);box-shadow:0 2px 0 rgba(0,0,0,.1)}
:lang(bn) .content h2[id]:not(.faq-h)::before{content:counter(cyl,bengali);font-family:"Hind Siliguri",sans-serif;font-size:22px}
.content h3{margin:1.6em 0 .5em;font:700 1.3rem/1.25 var(--f-disp);display:flex;gap:10px;align-items:baseline}
:lang(bn) .content h3{font:700 1.18rem/1.5 "Hind Siliguri",sans-serif}
.content h3::before{content:"";width:10px;height:10px;flex:none;background:var(--copper);transform:rotate(45deg) translateY(-2px)}
.content ul,.content ol{padding-left:0;margin:0 0 1.2em}
.content ul>li{list-style:none;position:relative;padding-left:30px;margin:.45em 0}
.content ul>li::before{content:"";position:absolute;left:4px;top:.62em;width:13px;height:13px;background:var(--iron-3);clip-path:polygon(25% 5%,75% 5%,100% 50%,75% 95%,25% 95%,0 50%);box-shadow:inset 0 0 0 3px var(--copper)}
.content ul>li::after{content:"";position:absolute;left:8.5px;top:calc(.62em + 4.5px);width:4px;height:4px;border-radius:50%;background:var(--card)}
.content ol{counter-reset:li}
.content ol>li{list-style:none;counter-increment:li;position:relative;padding-left:40px;margin:.6em 0}
.content ol>li::before{content:counter(li);position:absolute;left:0;top:.1em;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font:700 14px/1 var(--f-disp);color:#fff;background:var(--dykem)}
:lang(bn) .content ol>li::before{content:counter(li,bengali);font-family:"Hind Siliguri",sans-serif}
.content strong{font-weight:700;color:var(--ink)}
.content table{display:block;overflow-x:auto;max-width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15.5px}
.content th,.content td{padding:10px 12px;border:1px solid var(--rule);text-align:left;vertical-align:top}
.content th{background:var(--iron-2);color:#fff;font-weight:600}
.content blockquote{margin:1.2em 0;padding:14px 18px;border-left:4px solid var(--dykem);background:var(--dykem-l)}
.intro-extra{padding:18px 20px;margin-bottom:1.4em;background:var(--card);border:1px solid var(--rule);border-left:4px solid var(--copper);border-radius:4px 10px 10px 4px}
.intro-extra p:last-child{margin-bottom:0}

/* FAQ: feeler-gauge blades */
.faq{margin-top:2.6em}
.faq-h{margin:0 0 16px;display:flex;align-items:center;gap:14px;font:700 clamp(1.6rem,1.25rem + 1.3vw,2.15rem)/1.15 var(--f-disp)}
:lang(bn) .faq-h{font:700 clamp(1.4rem,1.15rem + 1vw,1.85rem)/1.45 "Hind Siliguri",sans-serif}
.faq-h::before{content:"";width:54px;height:22px;flex:none;border-radius:4px 12px 12px 4px;background:linear-gradient(180deg,#EEF0F1,#BFC4C8);box-shadow:inset 0 0 0 1px #9DA3A8,0 5px 0 -1px #D9DCDF,0 5px 0 0 #9DA3A8}
.faq details{position:relative;margin:0 0 10px;background:linear-gradient(180deg,#F7F8F8,#E1E4E6);border:1px solid #B3B9BD;border-radius:6px 30px 30px 6px;box-shadow:inset 0 1px 0 #fff,0 2px 0 -1px rgba(0,0,0,.08)}
.faq details[open]{border-radius:6px 30px 12px 6px;background:var(--card)}
.faq summary{display:grid;grid-template-columns:auto minmax(0,1fr) 32px;gap:12px;align-items:center;min-height:58px;padding:10px 14px 10px 14px;cursor:pointer;list-style:none;font-weight:600;line-height:1.5}
.faq summary::-webkit-details-marker{display:none}
.qn{display:inline-grid;place-items:center;min-width:40px;height:26px;padding:0 6px;border-radius:4px;background:var(--iron);color:#fff;font:700 14px/1 var(--f-disp);letter-spacing:.06em}
.faq summary::after{content:"";width:28px;height:28px;border-radius:50%;justify-self:end;background:
  linear-gradient(var(--ink),var(--ink)) center/12px 2px no-repeat,linear-gradient(var(--ink),var(--ink)) center/2px 12px no-repeat,
  radial-gradient(circle,#fff 0 62%,var(--rule-2) 64% 70%,transparent 72%);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:hover .qt{color:var(--dykem-2)}
.ans{padding:2px 20px 14px 66px}
.ans p{margin:0 0 .6em}
@media (max-width:479px){.ans{padding-left:18px}}

/* inner CTA: ignition */
.ignite{display:grid;gap:18px;align-items:center;margin:2.8em 0 0;padding:22px;border-radius:12px;background:var(--iron);color:var(--iron-t);
  background-image:linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px);background-size:24px 24px}
.ignite p{margin:0;color:#EDEFF1;font-size:1.05rem;line-height:1.6}
.start{justify-self:start;display:inline-grid;place-items:center;min-height:64px;padding:6px;border-radius:999px;text-decoration:none;background:linear-gradient(180deg,#59626A,#2A2F34);box-shadow:inset 0 1px 0 rgba(255,255,255,.25)}
.start span{display:flex;align-items:center;min-height:52px;padding:0 26px;border-radius:999px;color:#fff;font:700 16px/1.2 var(--f-body);background:radial-gradient(120% 140% at 50% 0%,#EE5A4F,var(--red) 55%,var(--red-2));box-shadow:inset 0 -3px 0 rgba(0,0,0,.25)}
:lang(en) .start span{font:700 18px/1 var(--f-disp);letter-spacing:.08em;text-transform:uppercase}
.start:hover span{filter:brightness(1.08)}
@media (min-width:640px){.ignite{grid-template-columns:minmax(0,1fr) auto;padding:26px 28px}}

/* job card (inner aside) */
.job{position:relative;padding:22px 20px 20px;background:var(--card);border:1px solid var(--rule);border-top:6px solid var(--dykem);border-radius:4px 4px 12px 12px}
.job::before{content:"";position:absolute;right:16px;top:14px;width:14px;height:14px;border-radius:50%;background:var(--bg);box-shadow:inset 0 1px 3px rgba(0,0,0,.35)}
.job-t{margin:0 0 6px;font:700 1.3rem/1.2 var(--f-disp)}
:lang(bn) .job-t{font:700 1.15rem/1.5 "Hind Siliguri",sans-serif}
.job p{font-size:15.5px;line-height:1.6;color:var(--ink-2)}
.job .btn{width:100%;margin-top:6px}

/* ---------- inner page head ---------- */
.plate-page{padding:24px 0 34px}
.ph-g{position:relative;display:grid;gap:20px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:0 0 14px;font-size:15px;color:var(--dykem-t)}
.crumbs a{display:inline-flex;align-items:center;min-height:44px;color:#fff;text-decoration:underline;text-decoration-color:rgba(255,255,255,.5)}
.crumbs .sep{opacity:.6}
.plate-page h1{margin:0 0 14px;font:700 clamp(2rem,1.3rem + 3.2vw,3.6rem)/1.02 var(--f-disp);text-wrap:balance;max-width:22ch}
:lang(bn) .plate-page h1{font:700 clamp(1.75rem,1.2rem + 2.4vw,2.9rem)/1.36 "Hind Siliguri",sans-serif;max-width:26ch}
.plate-page .lead{color:var(--dykem-t);max-width:64ch}
.plate-page .lead a{color:#fff}
.plate-page .lead strong{color:#fff}
.ph-art{display:none}
@media (min-width:1000px){
  .plate-page{padding:34px 0 50px}
  .ph-g{grid-template-columns:minmax(0,1fr) 300px;gap:48px}
  .ph-art{display:block;opacity:.9;transform:rotate(-4deg)}
  .ph-art .deck .fire{animation-duration:6s}
}
.nf{min-height:60vh;padding:60px 0}
.nf .lead{margin-bottom:22px}

/* ---------- related: gasket cards ---------- */
.parts{padding:48px 0 60px;background:var(--sheet);border-top:1px solid var(--rule)}
.parts-h{margin:0 0 22px;font:700 clamp(1.6rem,1.3rem + 1.2vw,2.2rem)/1.15 var(--f-disp)}
:lang(bn) .parts-h{font:700 clamp(1.4rem,1.15rem + 1vw,1.85rem)/1.45 "Hind Siliguri",sans-serif}
.parts-g{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))}
.gasket{position:relative;display:flex;flex-direction:column;gap:6px;height:100%;padding:22px 74px 22px 22px;border-radius:14px;text-decoration:none;color:var(--ink-2);
  background:radial-gradient(circle at 12px 12px,var(--rule-2) 0 3px,transparent 3.6px),radial-gradient(circle at calc(100% - 12px) calc(100% - 12px),var(--rule-2) 0 3px,transparent 3.6px),
    radial-gradient(circle at 12px calc(100% - 12px),var(--rule-2) 0 3px,transparent 3.6px),var(--card);
  border:2px solid var(--copper);box-shadow:inset 0 0 0 4px var(--card),inset 0 0 0 5px rgba(181,96,44,.35);transition:transform .18s,border-color .18s}
.gasket::after{content:"";position:absolute;right:18px;top:20px;width:38px;height:38px;border-radius:50%;background:radial-gradient(circle at 50% 38%,#4A525A 0 30%,#262B30 62%,#14171A);box-shadow:0 0 0 3px var(--card),0 0 0 5px var(--copper),inset 0 2px 5px rgba(0,0,0,.18)}
.gasket strong{font:700 1.25rem/1.2 var(--f-disp);color:var(--ink)}
:lang(bn) .gasket strong{font:700 1.1rem/1.5 "Hind Siliguri",sans-serif}
.gasket span{font-size:15px;line-height:1.55}
.gasket:hover{transform:translateY(-3px);border-color:var(--red);color:var(--ink-2)}
.gasket:hover::after{box-shadow:0 0 0 3px var(--card),0 0 0 5px var(--red),inset 0 2px 5px rgba(0,0,0,.18)}

/* ---------- footer ---------- */
.ft{background:var(--iron);color:var(--iron-t);font-size:15.5px}
.gasket-edge{height:22px;background:radial-gradient(circle at 20px 11px,var(--iron) 0 5px,transparent 5.6px) 0 0/40px 22px repeat-x,linear-gradient(180deg,#C97A45,var(--copper) 50%,#8F4A1F)}
.ft .wrap{padding-top:40px;padding-bottom:26px}
.ft-g{display:grid;gap:30px}
.brand-ft{color:#fff;margin:0 0 10px}
.brand-ft:hover{color:#fff}
.brand-ft .mk{color:#fff}
.ft-note{color:var(--copper-l);font-weight:600;margin:0 0 8px}
.ft p{line-height:1.65;margin:0 0 10px;max-width:52ch}
.ft-h{margin:0 0 8px;color:#fff;font:700 18px/1.3 var(--f-disp);letter-spacing:.06em}
:lang(en) .ft-h{text-transform:uppercase;letter-spacing:.14em;font-size:15px}
:lang(bn) .ft-h{font:700 17px/1.5 "Hind Siliguri",sans-serif;letter-spacing:0}
.ft-l{list-style:none;margin:0;padding:0}
.ft-l a{display:flex;align-items:center;min-height:44px;color:var(--iron-t);text-decoration:none;border-bottom:1px solid rgba(255,255,255,.08)}
.ft-l a:hover{color:var(--copper-l)}
.ft-bot{display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px;margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}
.cap{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;flex:none;background:repeating-conic-gradient(#3A4148 0 6deg,#262B30 6deg 12deg);box-shadow:inset 0 0 0 3px #4A525A}
.cap b{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font:700 15px/1 var(--f-disp)}
.up{margin-left:auto;display:inline-flex;align-items:center;min-height:44px;color:var(--iron-t)}
.up:hover{color:#fff}
@media (min-width:768px){.ft-g{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);gap:40px}}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition:none!important;scroll-behavior:auto!important}
  .deck .fire{opacity:0}.tach-w.idle .needle{animation:none}}
@media (min-width:768px){.parts-g{grid-template-columns:repeat(2,minmax(0,1fr))}.parts-g:has(>li:nth-child(5):last-child)>li:first-child{grid-column:span 2}}
@media (min-width:1000px){.parts-g{grid-template-columns:repeat(3,minmax(0,1fr))}.parts-g:has(>li:nth-child(4):last-child){grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (min-width:600px) and (max-width:979.98px){.plate-hero{max-width:500px}}