/* 11xxbet.com — "Don't-care bits": 11xx read as a bit mask. Logic lab sheet: K-map, timing lanes, bus-segment nav, cursor flags, truth-table FAQ, analyser scope. */
:root{
 --bg:#EDF0EA;--paper:#F8FAF6;--ink:#0E1916;--ink2:#23332D;--mut:#4D5C55;--line:#C9D2CA;--line2:#DDE3DB;
 --hi:#006A4E;--hi2:#0B8A62;--hiS:#D3EADD;--x:#C62A3C;--xS:#F7DDE0;--bus:#E9A23B;--busD:#7A4E08;--busS:#F6E4C0;--phos:#4FE39A;
 --dk:#0A1311;--dk2:#13221E;--dkl:#2A3E38;--dkt:#E9F3EC;--dkm:#9DB3A8;
 --fh:"Geologica","Anek Bangla","Noto Sans Bengali",system-ui,sans-serif;
 --fb:"Geologica","Noto Sans Bengali",system-ui,sans-serif;
 --fm:"Kode Mono","Anek Bangla",ui-monospace,monospace;
 --font-head:var(--fh);--font-body:var(--fb);
 --hatch:repeating-linear-gradient(135deg,var(--x) 0 1.5px,transparent 1.5px 6px);
 --edge:linear-gradient(currentColor,currentColor) 0 100%/6px 2px no-repeat,linear-gradient(currentColor,currentColor) 5px 0/2px 100% no-repeat,linear-gradient(currentColor,currentColor) 5px 0/9px 2px no-repeat;
 --hex:polygon(0 50%,12px 0,calc(100% - 12px) 0,100% 50%,calc(100% - 12px) 100%,12px 100%);
 color-scheme:light}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:16px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.7 var(--fb);overflow-x:hidden;font-synthesis:none;-webkit-font-smoothing:antialiased}
.lang-bn body,body.lang-bn{line-height:1.8}
img,svg{max-width:100%}
a{color:var(--hi)}
:focus-visible{outline:3px solid var(--bus);outline-offset:2px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 16px}
@media (min-width:640px){.wrap{padding:0 24px}}
@media (min-width:1100px){.wrap{padding:0 32px}}
.skip{position:absolute;left:12px;top:-120px;z-index:100;background:var(--ink);color:var(--paper);padding:12px 18px;font-weight:600;text-decoration:none}
.skip:focus{top:12px}
.sr,.lsw-l{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- header: signal bar + bus lane ---------- */
.hd{background:var(--paper);border-bottom:1.5px solid var(--ink);position:relative;z-index:20}
.hd-bar{border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;gap:10px;min-height:66px}
.brand{display:flex;align-items:center;gap:11px;min-height:44px;color:var(--ink);text-decoration:none;margin-right:auto;min-width:0}
.logo{width:38px;height:38px;flex:none;display:block}
.brand-t{display:flex;flex-direction:column;min-width:0}
.brand-n{font:700 1.22rem/1.05 var(--fm);white-space:nowrap}
.brand-s{font:500 .78rem/1.35 var(--fb);color:var(--mut)}
.hd-clk{display:none;flex:1 1 auto;max-width:340px;height:22px;opacity:.7;
 background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='22'%3E%3Cpath d='M0 20H8V2H24V20H32' fill='none' stroke='%234D5C55' stroke-width='1.5'/%3E%3C/svg%3E") repeat-x 0 50%/32px 22px;
 -webkit-mask:linear-gradient(90deg,transparent,#000 22%,#000 78%,transparent);mask:linear-gradient(90deg,transparent,#000 22%,#000 78%,transparent)}
.lsw{display:flex;border:1.5px solid var(--ink);flex:none}
.lsw a{display:grid;place-items:center;min-width:46px;min-height:42px;padding:0 10px;color:var(--ink);text-decoration:none;font:600 .9rem/1 var(--fm)}
.lsw a+a{border-left:1.5px solid var(--ink)}
.lsw a[aria-current]{background:var(--ink);color:var(--paper)}
.lsw a:not([aria-current]):hover{background:var(--busS)}
.lsw-s{display:block}
.hd-cta{display:none;align-items:center;gap:10px;min-height:44px;padding:0 16px;background:var(--hi);color:#fff;text-decoration:none;font:600 .95rem/1.2 var(--fb);border:1.5px solid var(--ink);flex:none}
.hd-cta:hover{background:var(--hi2)}
.edge{display:inline-block;width:14px;height:11px;flex:none;background:var(--edge)}
.menu-btn{order:5;display:inline-flex;align-items:center;gap:9px;min-height:44px;min-width:44px;padding:0 12px;border:1.5px solid var(--ink);background:var(--paper);color:var(--ink);font:600 .92rem/1 var(--fb);cursor:pointer;flex:none}
.menu-btn:hover{background:var(--busS)}
.mb-ico{display:grid;gap:4px;width:18px}
.mb-ico i{display:block;height:2px;background:currentColor;transition:transform .2s,opacity .2s}
.mb-ico i:nth-child(2){width:11px;margin-left:7px}
.hd.open .mb-ico i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hd.open .mb-ico i:nth-child(2){opacity:0}
.hd.open .mb-ico i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media (min-width:560px){.hd-cta{display:inline-flex}}
@media (min-width:760px){.hd-clk{display:block}}
@media (max-width:420px){.brand-s{display:none}.menu-btn .mb-t{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.hd-in{gap:8px}.lsw a{min-width:44px;padding:0 8px}}

.bus{background:var(--bg)}
.bus ul{list-style:none;margin:0;padding:12px 0 16px;display:flex;flex-direction:column;gap:6px}
.bus li{min-width:0}
.bus a{display:flex;align-items:center;gap:12px;min-height:50px;padding:6px 16px 6px 24px;background:var(--paper);color:var(--ink);text-decoration:none;font:500 1rem/1.35 var(--fb);clip-path:polygon(0 50%,12px 0,100% 0,100% 100%,12px 100%)}
.seg-b{font:600 .74rem/1 var(--fm);color:var(--mut);flex:none}
.bus a:hover{background:var(--busS)}
.bus a[aria-current]{background:var(--hi);color:#fff}
.bus a[aria-current] .seg-b{color:var(--phos)}
.bus a:focus-visible{outline:2px solid var(--ink);outline-offset:-6px;background:var(--bus);color:var(--ink)}
@media (max-width:979px){.bus{display:none;border-top:1px solid var(--line)}.hd.open .bus{display:block}}
@media (min-width:980px){
 .menu-btn{display:none}
 .bus ul{flex-direction:row;gap:0;padding:10px 0}
 .bus li{flex:1 1 0;background:var(--ink2);clip-path:var(--hex);padding:1.5px 2px}
 .bus a{justify-content:center;text-align:center;min-height:48px;padding:6px 26px;clip-path:var(--hex);font-size:.97rem}
 .bus li:has(a[aria-current]){background:var(--hi)}
}
@media (min-width:980px) and (max-width:1179px){.seg-b{display:none}}

/* ---------- shared bits ---------- */
h1,h2,h3{font-family:var(--fh);color:var(--ink);text-wrap:balance}
h1{font-weight:700;font-size:clamp(2rem,1.25rem + 3.3vw,3.75rem);line-height:1.06;margin:.45em 0 .4em;font-variation-settings:"SHRP" 60}
h2{font-weight:700;font-size:clamp(1.42rem,1.1rem + 1.25vw,2rem);line-height:1.2;margin:0 0 .6em;font-variation-settings:"SHRP" 40}
h3{font-weight:650;font-size:1.2rem;line-height:1.35;margin:1.5em 0 .5em}
.lang-bn h1{line-height:1.38;font-size:clamp(1.85rem,1.2rem + 2.9vw,3.3rem)}
.lang-bn h2{line-height:1.5}
.lang-bn h3{line-height:1.55}
:lang(en) h1,.lang-en h1{letter-spacing:-.02em}
.lead p{font-size:clamp(1.06rem,1rem + .3vw,1.2rem);color:var(--ink2);max-width:62ch;margin:0 0 .8em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:10px 22px;border:2px solid var(--ink);background:var(--paper);color:var(--ink);font:600 1rem/1.3 var(--fb);text-decoration:none;box-shadow:4px 4px 0 var(--ink);transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn-go{background:var(--hi);color:#fff}
.btn-go:hover{background:var(--hi2)}
.btn-line:hover{background:var(--busS)}
.btn-sm{min-height:46px;padding:8px 16px;font-size:.95rem;box-shadow:3px 3px 0 var(--ink)}

/* ---------- home hero ---------- */
.hero{background:var(--bg) linear-gradient(90deg,rgba(14,25,22,.055) 1px,transparent 1px) 0 0/48px 100%;padding:34px 0 26px;border-bottom:1px solid var(--line)}
.hero-g{display:grid;gap:34px;align-items:center}
.hero-c{min-width:0}
.kicker{display:inline-flex;align-items:center;gap:10px;margin:0;padding:6px 12px 6px 6px;border:1.5px solid var(--ink);background:var(--paper);font:600 .86rem/1.4 var(--fm);color:var(--ink2);max-width:100%}
.lang-bn .kicker{font-family:var(--fb);font-weight:500}
.xbox{width:26px;height:16px;flex:none;background:var(--hatch);border-block:1.5px solid var(--x);clip-path:polygon(0 50%,5px 0,100% 0,100% 100%,5px 100%)}
.acts{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 28px}
.legend{list-style:none;margin:0;padding:16px 0 0;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;gap:10px 26px}
.legend li{display:flex;align-items:center;gap:12px;font:500 .95rem/1.5 var(--fb);color:var(--ink2)}
.legend li::before{content:"";flex:none;width:40px;height:14px}
.lg-x::before{background:var(--hatch);border-block:1.5px solid var(--x);clip-path:polygon(0 50%,5px 0,100% 0,100% 100%,5px 100%)}
.lg-b::before{background:var(--bus);clip-path:polygon(0 50%,6px 0,calc(100% - 6px) 0,100% 50%,calc(100% - 6px) 100%,6px 100%)}
.lg-1::before{color:var(--hi);background:linear-gradient(var(--mut),var(--mut)) 0 100%/10px 2px no-repeat,linear-gradient(currentColor,currentColor) 9px 0/2px 100% no-repeat,linear-gradient(currentColor,currentColor) 9px 0/31px 2px no-repeat}
.km-card{margin:0;justify-self:center;width:100%;max-width:400px;background:var(--paper);border:1.5px solid var(--ink);padding:14px 16px 10px 8px;position:relative;box-shadow:8px 8px 0 var(--line)}
.km-card::before,.km-card::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--x)}
.km-card::before{top:-7px;left:-7px;border-width:2px 0 0 2px}
.km-card::after{bottom:-7px;right:-7px;border-width:0 2px 2px 0}
.km{display:block;width:100%;height:auto}
.km text{font-family:var(--fm)}
.km-v{font-size:13px;fill:var(--mut)}
.km-h{font-size:15px;fill:var(--ink2);text-anchor:middle}
.km-r{text-anchor:end}
.km-f{fill:var(--paper);stroke:var(--ink);stroke-width:1.5}
.km-g{stroke:var(--line);stroke-width:1}
.km-d{stroke:var(--ink);stroke-width:1.2}
.km-loop{fill:var(--hiS);stroke:var(--hi);stroke-width:2.5}
.km-c{font-size:19px;text-anchor:middle;fill:#96A39C}
.km-1{fill:var(--hi);font-weight:700;font-size:24px}
@media (prefers-reduced-motion:no-preference){
 .km-loop{stroke-dasharray:640;animation:loop 1.6s .3s cubic-bezier(.6,0,.2,1) both}
 @keyframes loop{from{stroke-dashoffset:640}to{stroke-dashoffset:0}}
}
@media (min-width:900px){.hero{padding:64px 0 34px}.hero-g{grid-template-columns:minmax(0,1.4fr) minmax(300px,.8fr);gap:56px}}

/* timing lanes */
.trace{position:relative;display:grid;gap:9px;margin-top:30px;padding:14px 0 4px;border-top:1px solid var(--line)}
.ln{display:grid;grid-template-columns:22px minmax(0,1fr);align-items:center;gap:10px;height:22px}
.ln-n{font:600 .8rem/1 var(--fm);color:var(--mut)}
.ln-w{display:flex;height:100%;min-width:0}
.ln-w i{display:block;height:100%;min-width:0}
.s0{border-bottom:2px solid var(--mut)}
.s1{border-top:2px solid var(--hi)}
.s1.e{border-left:2px solid var(--hi)}
.s0.e{border-left:2px solid var(--mut)}
.sx{background:repeating-linear-gradient(135deg,rgba(198,42,60,.55) 0 1.5px,transparent 1.5px 6px);border-block:1.5px solid var(--x);clip-path:polygon(0 50%,8px 0,100% 0,100% 100%,8px 100%)}
.ln-clk .ln-w{background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='22'%3E%3Cpath d='M0 21H8V1H24V21H32' fill='none' stroke='%234D5C55' stroke-width='1.6'/%3E%3C/svg%3E") repeat-x 0 50%/32px 22px}
.sb{flex:1 1 0;display:grid!important;place-items:center;background:var(--busS);clip-path:polygon(0 50%,8px 0,calc(100% - 8px) 0,100% 50%,calc(100% - 8px) 100%,8px 100%)}
.sb:nth-child(even){background:#EFD7A6}
.sb b{font:600 .72rem/1 var(--fm);color:var(--busD)}
.cur{position:absolute;top:2px;bottom:0;left:64%;border-left:2px dashed var(--bus);pointer-events:none}
.cur::before{content:"";position:absolute;top:-2px;left:-8px;width:14px;height:12px;background:var(--bus);clip-path:polygon(0 0,100% 0,50% 100%)}
@media (prefers-reduced-motion:no-preference){.cur{animation:sweep 10s ease-in-out infinite alternate}@keyframes sweep{from{left:38%}to{left:94%}}}

/* ---------- game bench ---------- */
.bench{background:var(--ink) linear-gradient(90deg,rgba(157,179,168,.06) 1px,transparent 1px) 0 0/48px 100%;padding:36px 0 44px;color:var(--dkt);scroll-margin-top:0}
.scope{border:1.5px solid var(--dkl);background:var(--dk);container:scope/inline-size;box-shadow:8px 8px 0 #000}
.scope-h{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--dkl);font:600 .86rem/1.4 var(--fm);color:var(--dkm);min-height:46px}
.lang-bn .scope-h{font-family:var(--fb)}
.led{width:10px;height:10px;border-radius:50%;background:var(--phos);box-shadow:0 0 10px var(--phos);flex:none}
@media (prefers-reduced-motion:no-preference){.led{animation:blink 2.4s steps(2,jump-none) infinite}@keyframes blink{50%{opacity:.35}}}
.scope-t{color:var(--dkt)}
.scope-tag{margin-left:auto;padding:2px 9px;border:1px solid var(--bus);color:var(--bus)}
.scope-b #game-root:empty{min-height:640px}
@container scope (min-width:760px){.scope-b #game-root:empty{min-height:470px}}

/* ---------- document ---------- */
.doc{padding:36px 0 60px}
.doc-g{display:grid;gap:26px}
.pane{display:contents}
.probe{order:3}
.doc-b{min-width:0;max-width:780px}
.sig{border:1.5px solid var(--ink);background:var(--bg)}
.sig summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:50px;padding:0 14px;cursor:pointer;list-style:none;font:600 1rem/1.3 var(--fb)}
.sig summary::-webkit-details-marker{display:none}
.sig[open] summary{border-bottom:1px solid var(--line)}
.sig-c{width:40px;height:16px;flex:none;background:repeating-linear-gradient(135deg,var(--mut) 0 1.5px,transparent 1.5px 6px);border-block:1.5px solid var(--mut);clip-path:polygon(0 50%,5px 0,calc(100% - 5px) 0,100% 50%,calc(100% - 5px) 100%,5px 100%)}
.sig[open] .sig-c{background:var(--hi);border-color:var(--hi)}
.sig ol{list-style:none;margin:0;padding:6px 0}
.sig li{margin:0}
.sig a{display:grid;grid-template-columns:30px minmax(0,1fr);gap:8px;align-items:start;min-height:44px;padding:9px 14px 9px 11px;border-left:3px solid transparent;color:var(--ink2);text-decoration:none;font:500 .93rem/1.45 var(--fb)}
.lang-bn .sig a{line-height:1.7}
.sig a:hover{background:var(--paper)}
.sig a[aria-current]{border-left-color:var(--bus);background:var(--paper);color:var(--ink)}
.toc-n{font:600 .78rem/1.9 var(--fm);color:var(--mut)}
.sig a[aria-current] .toc-n{color:var(--busD)}
.probe{border:1.5px solid var(--ink);background:var(--paper);padding:0 16px 18px}
.probe p{margin:0 0 14px;font-size:.96rem;color:var(--ink2)}
.probe .probe-t{margin:0 -16px 14px;padding:10px 16px;background:var(--bus);color:var(--ink);font:700 1.02rem/1.4 var(--fh)}
@media (min-width:980px){
 .doc{padding:48px 0 76px}
 .doc-g{grid-template-columns:268px minmax(0,1fr);gap:52px;align-items:start}
 .pane{display:block;position:sticky;top:16px}
 .sig nav{max-height:min(58vh,560px);overflow:auto}
 .probe{margin-top:18px}
}
.intro-rest p,.sec-b p,.tt-a p{margin:0 0 1em}
.intro-rest{margin-bottom:34px}
.sec{position:relative;padding:0 0 10px 56px;margin:0 0 34px}
.sec::before{content:"";position:absolute;left:21px;top:40px;bottom:0;border-left:2px dashed var(--line)}
.mk{position:absolute;left:0;top:2px;width:44px}
.mk span{display:grid;place-items:center;width:44px;height:34px;padding-bottom:6px;background:var(--bus);color:var(--ink);font:700 .9rem/1 var(--fm);clip-path:polygon(0 0,100% 0,100% 70%,50% 100%,0 70%)}
.sec h2{scroll-margin-top:16px}
.sec-plain{margin:0 0 30px}
@media (max-width:560px){.sec{padding-left:44px}.sec::before{left:16px}.mk,.mk span{width:34px}.mk span{height:30px;font-size:.8rem}}
.doc-b h3{position:relative}
.doc-b ul{list-style:none;padding:0;margin:0 0 1.1em}
.doc-b ul li{position:relative;padding-left:26px;margin:.45em 0}
.doc-b ul li::before{content:"";position:absolute;left:0;top:.62em;width:14px;height:9px;color:var(--hi);background:var(--edge)}
.lang-bn .doc-b ul li::before{top:.72em}
.doc-b ol{list-style:none;padding:0;margin:0 0 1.1em;counter-reset:o}
.doc-b ol>li{counter-increment:o;position:relative;padding-left:42px;margin:.55em 0}
.doc-b ol>li::before{content:counter(o,decimal-leading-zero);position:absolute;left:0;top:.2em;min-width:32px;padding:1px 5px;text-align:center;background:var(--busS);border:1px solid var(--busD);color:var(--busD);font:600 .78rem/1.5 var(--fm)}
.lang-bn .doc-b ol>li::before{content:counter(o,bengali);top:.35em}
.doc-b li>ul,.doc-b li>ol{margin:.4em 0}
.doc-b strong{font-weight:650;color:var(--ink)}
.doc-b a{text-decoration-thickness:1.5px;text-underline-offset:3px}
.doc-b a:hover{background:var(--hiS)}
.table-wrap{overflow-x:auto;margin:1.2em 0 1.4em;border:1.5px solid var(--ink)}
.doc-b table{border-collapse:collapse;width:100%;min-width:480px;font-size:.95rem;line-height:1.5}
.doc-b th{background:var(--ink);color:var(--paper);text-align:left;padding:10px 12px;font:600 .88rem/1.4 var(--fm)}
.lang-bn .doc-b th{font-family:var(--fb);line-height:1.6}
.doc-b td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.doc-b tr:nth-child(even) td{background:var(--bg)}
.doc-b blockquote{margin:1.2em 0;padding:12px 18px;border-left:4px solid var(--bus);background:var(--busS)}

/* truth-table FAQ */
.tt{margin-top:46px}
.tt h2{padding-bottom:12px;margin:0;border-bottom:2px solid var(--ink)}
.tt details{border-bottom:1px solid var(--line)}
.tt summary{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center;min-height:58px;padding:12px 2px;cursor:pointer;list-style:none;font:600 1.04rem/1.45 var(--fb);color:var(--ink)}
.lang-bn .tt summary{line-height:1.7}
.tt summary::-webkit-details-marker{display:none}
.tt summary:hover .tt-q{color:var(--hi)}
.tt-bits{font:600 .82rem/1 var(--fm);color:var(--mut);padding:6px 7px;background:var(--bg);border:1px solid var(--line)}
.tt details[open] .tt-bits{background:var(--hiS);border-color:var(--hi);color:var(--hi)}
.tt-sw{position:relative;width:42px;height:24px;border:1.5px solid var(--ink);background:var(--paper)}
.tt-sw i{position:absolute;top:2.5px;left:3px;width:15px;height:16px;background:var(--mut);transition:transform .2s,background .2s}
.tt details[open] .tt-sw{background:var(--hiS)}
.tt details[open] .tt-sw i{transform:translateX(17px);background:var(--hi)}
.tt-a{padding:0 4px 16px}
@media (min-width:600px){.tt-a{padding-left:74px;padding-right:56px}}

.cta{margin:44px 0 0;padding:22px 22px 24px;display:grid;gap:16px;background:var(--ink);color:var(--dkt);box-shadow:8px 8px 0 var(--line)}
.cta-trace{height:24px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='24'%3E%3Cpath d='M0 22H10V2H30V22H48' fill='none' stroke='%234FE39A' stroke-width='2'/%3E%3C/svg%3E") repeat-x 0 50%/48px 24px;-webkit-mask:linear-gradient(90deg,#000 60%,transparent);mask:linear-gradient(90deg,#000 60%,transparent)}
.cta p{margin:0;font:600 1.14rem/1.5 var(--fh);color:#fff;max-width:56ch}
.lang-bn .cta p{line-height:1.75}
.cta .btn{justify-self:start;border-color:var(--phos);box-shadow:4px 4px 0 var(--bus)}

/* ---------- inner page head ---------- */
.phead{background:var(--bg) linear-gradient(90deg,rgba(14,25,22,.055) 1px,transparent 1px) 0 0/48px 100%;padding:14px 0 20px;border-bottom:1px solid var(--line)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;align-items:center;font:500 .88rem/1.4 var(--fm);color:var(--mut)}
.lang-bn .crumbs ol{font-family:var(--fb)}
.crumbs li{display:flex;align-items:center;min-width:0}
.crumbs li+li::before{content:"";width:16px;height:10px;margin:0 8px;flex:none;background:linear-gradient(var(--mut),var(--mut)) 0 100%/7px 1.5px no-repeat,linear-gradient(var(--mut),var(--mut)) 6px 0/1.5px 100% no-repeat,linear-gradient(var(--mut),var(--mut)) 6px 0/10px 1.5px no-repeat}
.crumbs a{display:inline-flex;align-items:center;min-height:44px;color:var(--hi)}
.crumbs span{color:var(--ink2);padding:10px 0}
.phead h1{max-width:26ch;margin:.25em 0 .45em}
.lang-bn .phead h1{max-width:30ch}
.trace-p{margin-top:24px}
.trace-p .ln{grid-template-columns:0 minmax(0,1fr);gap:0}
@media (min-width:900px){.phead{padding:22px 0 26px}}

/* ---------- related ---------- */
.rel{background:var(--bg);padding:46px 0 50px;border-top:1px solid var(--line)}
.rel h2{margin:0 0 18px}
.rel-g{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}
.rc{display:flex;flex-direction:column;gap:8px;height:100%;padding:0 18px 20px;background:var(--paper);border:1.5px solid var(--ink);color:var(--ink);text-decoration:none;transition:transform .15s,box-shadow .15s}
.rc:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
.rc-bus{display:flex;align-items:center;margin:0 -18px 8px;padding:9px 18px;border-bottom:1px solid var(--line);background:linear-gradient(var(--mut),var(--mut)) 0 50%/100% 1px no-repeat,var(--bg)}
.rc-bus b{padding:5px 16px;background:var(--busS);color:var(--busD);font:600 .78rem/1 var(--fm);clip-path:polygon(0 50%,8px 0,calc(100% - 8px) 0,100% 50%,calc(100% - 8px) 100%,8px 100%)}
.rc:hover .rc-bus b{background:var(--hi);color:#fff}
.rc strong{font:700 1.1rem/1.35 var(--fh)}
.lang-bn .rc strong{line-height:1.55}
.rc-d{color:var(--mut);font-size:.95rem;line-height:1.6}
.lang-bn .rc-d{line-height:1.75}
.note{margin:0;font-size:.92rem;color:var(--mut);max-width:84ch}

/* ---------- footer ---------- */
.ft{background:var(--ink);color:#C9D6CF;padding:0 0 26px}
.ft-wave{height:26px;border-bottom:1px solid var(--dkl);background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='26'%3E%3Cpath d='M0 24H12V2H36V24H48' fill='none' stroke='%232A3E38' stroke-width='2'/%3E%3C/svg%3E") repeat-x 0 50%/48px 26px}
.ft-g{display:grid;gap:26px;padding-top:34px;padding-bottom:30px}
.ft .brand{color:#fff;margin:0 0 14px}
.ft .brand-s{color:var(--dkm)}
.ft p{margin:0;font-size:.95rem;line-height:1.7}
.lang-bn .ft p{line-height:1.85}
.ft .ft-h{font:600 .86rem/1.4 var(--fm);color:var(--bus);margin:0 0 8px}
.lang-bn .ft .ft-h{font-family:var(--fb)}
.ft ul{list-style:none;margin:0;padding:0;display:grid}
.ft ul a{display:flex;align-items:center;min-height:44px;color:var(--dkt);text-decoration:none;font-size:.97rem;line-height:1.4}
.ft ul a:hover{color:var(--phos);text-decoration:underline;text-underline-offset:3px}
.ft-base{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;padding-top:18px;border-top:1px solid var(--dkl);font:500 .9rem/1.4 var(--fm);color:var(--dkm)}
.ft-base>*{margin:0}
.age{display:inline-grid;place-items:center;min-width:48px;height:32px;padding:0 8px;border:1.5px solid #FF8A96;color:#FFB3BC;font:700 .95rem/1 var(--fm)}
@media (min-width:800px){.ft-g{grid-template-columns:1.5fr 1fr 1fr;gap:44px}}

/* ---------- 404 ---------- */
.nf{padding:72px 0 96px;background:var(--bg)}
.nf-code{margin:0;font:700 clamp(3rem,10vw,6rem)/1 var(--fm);color:var(--x)}
.nf p{max-width:52ch}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.hd,.bench,.pane,.rel,.ft-wave{display:none}}
@media (max-width:899px){.km-card{max-width:300px;box-shadow:6px 6px 0 var(--line)}}
@media (max-width:560px){.km-card{max-width:250px;padding:10px 12px 6px 4px}.scope{box-shadow:5px 5px 0 #000}.bench{padding:28px 0 36px}}
.hero h1{margin-bottom:.5em}