/* =====================================================================
   ClassNode — পাবলিক সাইটের নকশা
   ফাইল   : public_html/assets/css/site.css
   সংস্করণ : 1.4.0   ·   ফেজ ২০.১ (নকশা-উন্নয়ন) · ADR-125 · ADR-126 (ভিডিও, সোশ্যাল)   ·   NODE CORPORATION

   ১.৪.০ (হটফিক্স ৬৪): হেডারে এক-বোতামের ভাষা বদল (.cn-langtog); ফোনে পাদের পাতা/নীতি লিংক এক সারিতে পাশাপাশি; কপিরাইট সবসময় মাঝে।

   ১.৩.০ (হটফিক্স ৫৪): হিরোর "ডেমো দেখুন" গাঢ় সোনালি-হলুদ (--c-gold); ভিডিও-কার্ড মাঝ বরাবর (ফ্লেক্স, একটি হলে বড়)।

   একটিই কোড, তিন মাপ (আলাদা "মোবাইল সংস্করণ" নয় — দুটি রাখলে একটি পুরোনো হয়ে যায়):
     ফোন   < ৬০০px   : এক কলাম, হ্যামবার্গার মেনু, পুরো-প্রস্থ বোতাম, ফোনের ছবি
     ট্যাবলেট ৬০০–৯৯৯ : দুই কলামের কার্ড; ৯০০px থেকে মেনু খোলা সারিতে
     ডেস্কটপ ≥ ১০০০px: দুই-কলামের হিরো (ডানে নমুনা-পর্দা), চার কলামের কার্ড
   রং ও মাপ কেবল tokens.css-এর চলক থেকে — ব্যবহারকারীর থিম বদলালে সাইটও বদলায়।
   কোণ ৮px (--r-card), বোতাম ৬px — ব্র্যান্ডের নিয়ম। বাইরের ছবি নেই (CSP) — সব CSS/SVG।
   ===================================================================== */

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
html.cn-menu-open { overflow: hidden; }

.cn-site { margin: 0; background: var(--c-bg); color: var(--c-text); font-family: var(--font-bn); line-height: 1.7; }
.cn-site section[id] { scroll-margin-top: 72px; }
.cn-site__wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; box-sizing: border-box; }
@media (min-width: 760px) { .cn-site__wrap { padding: 0 32px; } }

.cn-site__skip { position: absolute; left: -9999px; top: 0; background: var(--c-surface); color: var(--c-text); padding: 8px 12px; z-index: 300; }
.cn-site__skip:focus { left: 8px; top: 8px; }

/* বড় বোতাম (সাইটে) */
.cn-site .cn-btn--xl { min-height: 52px; padding: 0 28px; font-size: 1.05rem; border-radius: var(--r-btn); }
.cn-site .cn-btn--accent { box-shadow: 0 6px 18px rgba(55, 129, 74, .28); }

/* =================== মাথা =================== */
.cn-site__head {
  position: sticky; top: 0; z-index: var(--z-nav, 110);
  background: var(--c-surface);
  background: color-mix(in srgb, var(--c-surface) 92%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(10px); backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--c-line);
  padding-top: env(safe-area-inset-top, 0);
  transition: box-shadow .2s;
}
.cn-site__head.is-scrolled { box-shadow: 0 4px 20px rgba(22, 35, 61, .08); }
.cn-site__headrow { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.cn-site__headrow .cn-brand { margin-right: auto; display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-size: 1.25rem; }

.cn-site__nav { display: none; gap: 28px; }
.cn-site__nav a { color: var(--c-text); text-decoration: none; font-weight: var(--fw-semi); font-size: .98rem; padding: 6px 0; border-bottom: 2px solid transparent; }
.cn-site__nav a:hover { color: var(--c-accent); border-bottom-color: var(--c-accent-bright); }
.cn-site__actions { display: flex; align-items: center; gap: 10px; }
.cn-site__apply { display: none; }

/* হ্যামবার্গার (JS ছাড়াই — details) */
.cn-menu { position: static; }
.cn-menu > summary { list-style: none; cursor: pointer; width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--r-btn); border: 1px solid var(--c-line); background: var(--c-surface); }
.cn-menu > summary::-webkit-details-marker { display: none; }
.cn-menu > summary:focus-visible { outline: 2px solid var(--c-focus); outline-offset: 2px; }
.cn-menu__bars, .cn-menu__bars::before, .cn-menu__bars::after { display: block; width: 20px; height: 2px; background: var(--c-text); border-radius: 2px; content: ''; position: relative; transition: transform .2s, background .2s; }
.cn-menu__bars::before { position: absolute; top: -6px; }
.cn-menu__bars::after  { position: absolute; top: 6px; }
.cn-menu[open] .cn-menu__bars { background: transparent; }
.cn-menu[open] .cn-menu__bars::before { transform: translateY(6px) rotate(45deg); }
.cn-menu[open] .cn-menu__bars::after  { transform: translateY(-6px) rotate(-45deg); }
.cn-menu__panel {
  position: absolute; left: 0; right: 0; top: 100%;
  background: var(--c-surface); border-bottom: 1px solid var(--c-line);
  box-shadow: 0 16px 32px rgba(22, 35, 61, .14);
  padding: 8px 20px 20px; max-height: calc(100vh - 64px); overflow-y: auto;
}
.cn-menu__panel a:not(.cn-btn) { display: block; padding: 14px 4px; color: var(--c-text); text-decoration: none; font-weight: var(--fw-semi); font-size: 1.05rem; border-bottom: 1px solid var(--c-line-soft); }
.cn-menu__panel .cn-btn { margin-top: 14px; width: 100%; }

@media (min-width: 900px) {
  .cn-site__nav { display: flex; }
  .cn-site__apply { display: inline-flex; }
  .cn-menu { display: none; }
}

/* =================== হিরো =================== */
.cn-hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(79, 166, 101, .28), transparent 60%),
    linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  padding: 40px 0 56px;
}
.cn-hero__grid { display: grid; gap: 36px; align-items: center; }
.cn-hero__copy { text-align: center; }
.cn-hero__eyebrow { display: inline-block; font-size: .85rem; font-weight: var(--fw-semi); padding: 4px 14px; border-radius: 18px; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .22); margin: 0 0 16px; line-height: 1.5; }
.cn-hero__title { font-size: clamp(1.9rem, 6.4vw, 3.1rem); line-height: 1.22; margin: 0 0 16px; font-weight: var(--fw-bold); color: #fff; letter-spacing: -.01em; }
.cn-hero__sub { font-size: clamp(1rem, 2.6vw, 1.15rem); line-height: 1.75; margin: 0 auto 26px; opacity: .93; max-width: 560px; }
.cn-hero__cta { display: flex; flex-direction: column; gap: 12px; align-items: stretch; max-width: 420px; margin: 0 auto; }
/* হটফিক্স ৫৪: গাঢ় হলুদ — নীল পটে চোখে পড়ে */
.cn-hero__ghost { background: transparent; color: var(--c-gold); border: 2px solid var(--c-gold); font-weight: var(--fw-bold); }
.cn-hero__ghost:hover { background: var(--c-gold); color: var(--c-primary-dark); }
.cn-hero__note { margin: 16px 0 0; font-size: .92rem; opacity: .85; }

@media (min-width: 600px) { .cn-hero__cta { flex-direction: row; justify-content: center; max-width: none; } }
@media (min-width: 1000px) {
  .cn-hero { padding: 84px 0 96px; }
  .cn-hero__grid { grid-template-columns: 1.05fr .95fr; gap: 56px; }
  .cn-hero__copy { text-align: left; }
  .cn-hero__title { font-size: clamp(2.2rem, 3.7vw, 3.1rem); }
  .cn-hero__sub { margin-left: 0; }
  .cn-hero__cta { justify-content: flex-start; margin: 0; }
}

/* ---- নমুনা-পর্দা (CSS-এ আঁকা — কোনো ছবি-ফাইল নয়) ---- */
.cn-mock { position: relative; width: 100%; max-width: 440px; margin: 0 auto; min-height: 330px; }
.cn-mock__win { display: none; background: var(--c-surface); color: var(--c-text); border-radius: var(--r-card); box-shadow: 0 24px 60px rgba(0, 0, 0, .35); overflow: hidden; width: 76%; }
.cn-mock__bar { display: flex; gap: 6px; padding: 10px 12px; background: var(--c-line-soft); border-bottom: 1px solid var(--c-line); }
.cn-mock__bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--c-line); }
.cn-mock__body { padding: 16px 18px 18px; }
.cn-mock__title { font-weight: var(--fw-bold); color: var(--c-primary); margin-bottom: 10px; }
.cn-mock__chips { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.cn-mock__chips span { font-size: .8rem; font-weight: var(--fw-semi); padding: 3px 10px; border-radius: var(--r-pill); }
.cn-mock__ok { background: var(--c-accent-tint); color: var(--c-accent-dark); }
.cn-mock__no { background: #FDECEC; color: #9B1C1C; }
.cn-mock__bars { display: flex; align-items: flex-end; gap: 8px; height: 74px; margin-bottom: 16px; }
.cn-mock__bars b { flex: 1; background: var(--c-accent-bright); border-radius: 4px 4px 0 0; opacity: .85; }
.cn-mock__bars b:nth-child(1) { height: 70%; } .cn-mock__bars b:nth-child(2) { height: 85%; } .cn-mock__bars b:nth-child(3) { height: 60%; }
.cn-mock__bars b:nth-child(4) { height: 92%; } .cn-mock__bars b:nth-child(5) { height: 78%; } .cn-mock__bars b:nth-child(6) { height: 88%; } .cn-mock__bars b:nth-child(7) { height: 66%; }
.cn-mock__fee { font-size: .82rem; color: var(--c-muted); }
.cn-mock__meter { height: 8px; background: var(--c-line-soft); border-radius: var(--r-pill); margin-top: 6px; overflow: hidden; }
.cn-mock__meter i { display: block; width: 72%; height: 100%; background: var(--c-primary); border-radius: var(--r-pill); }

.cn-mock__phone { position: relative; width: 210px; margin: 0 auto; background: #0f1a2e; border: 6px solid #0f1a2e; border-radius: 28px; box-shadow: 0 24px 60px rgba(0, 0, 0, .4); padding: 26px 10px 22px; }
.cn-mock__phone::before { content: ''; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); width: 56px; height: 5px; border-radius: 3px; background: #2b3a57; }
.cn-mock__sms { background: var(--c-surface); color: var(--c-text); border-radius: 12px 12px 12px 3px; padding: 9px 11px; margin-bottom: 9px; font-size: .78rem; line-height: 1.5; }
.cn-mock__sms small { display: block; color: var(--c-accent); font-weight: var(--fw-bold); font-size: .7rem; margin-bottom: 2px; }
.cn-mock__sms p { margin: 0; }
.cn-mock__cap { text-align: center; font-size: .78rem; opacity: .7; margin: 14px 0 0; }

@media (min-width: 1000px) {
  .cn-mock { max-width: 520px; min-height: 420px; }
  .cn-mock__win { display: block; margin-top: 18px; }
  .cn-mock__phone { position: absolute; right: 0; bottom: 10px; width: 226px; margin: 0; transform: rotate(3deg); }
  .cn-mock__cap { position: absolute; left: 0; bottom: -14px; width: 76%; text-align: center; margin: 0; }
}

/* =================== এক নজরে =================== */
.cn-trust { background: var(--c-surface); border-bottom: 1px solid var(--c-line); }
.cn-trust__row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; padding-top: 18px; padding-bottom: 18px; font-size: .9rem; font-weight: var(--fw-semi); }
.cn-trust__row span { display: flex; gap: 8px; align-items: flex-start; }
.cn-trust__row span::before { content: '✓'; flex: none; color: var(--c-accent-bright); font-weight: var(--fw-bold); }
@media (min-width: 900px) { .cn-trust__row { grid-template-columns: repeat(4, 1fr); padding-top: 22px; padding-bottom: 22px; font-size: .98rem; } }

/* =================== অংশ =================== */
.cn-sec { padding: 52px 0; }
.cn-sec--tint { background: var(--c-primary-tint); }
.cn-sec__head { text-align: center; max-width: 680px; margin: 0 auto 36px; }
.cn-sec__title { margin: 0 0 8px; font-size: clamp(1.45rem, 4.4vw, 2.15rem); line-height: 1.3; color: var(--c-primary); letter-spacing: -.01em; }
.cn-sec__sub { margin: 0; color: var(--c-muted); line-height: 1.75; font-size: 1.02rem; }
.cn-sec__note { margin: 24px 0 0; font-size: .92rem; color: var(--c-muted); text-align: center; }
@media (min-width: 900px) { .cn-sec { padding: 84px 0; } .cn-sec__head { margin-bottom: 48px; } }

.cn-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 600px) { .cn-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (min-width: 1000px) { .cn-grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* ---- সুবিধার কার্ড ---- */
.cn-feat { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); padding: 22px; transition: transform .2s, box-shadow .2s, border-color .2s; }
.cn-feat__icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: var(--c-accent-tint); color: var(--c-accent-dark); margin-bottom: 14px; }
.cn-feat__icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.cn-feat h3 { margin: 0 0 6px; font-size: 1.08rem; color: var(--c-primary); }
.cn-feat p { margin: 0; line-height: 1.75; font-size: .95rem; color: var(--c-text); }
@media (hover: hover) { .cn-feat:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(22, 35, 61, .1); border-color: var(--c-line-strong, var(--c-line)); } }
@media (max-width: 599px) {
  .cn-feat--row { display: grid; grid-template-columns: 46px 1fr; gap: 0 14px; padding: 16px; }
  .cn-feat--row .cn-feat__icon { margin: 0; grid-row: 1 / span 2; }
  .cn-feat--row h3 { align-self: end; }
}
.cn-feat--aud { border-top: 3px solid var(--c-accent-bright); }

/* ---- ধাপ ---- */
.cn-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; counter-reset: s; }
.cn-steps__item { display: flex; gap: 16px; align-items: flex-start; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); padding: 20px; }
.cn-steps__num { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border-radius: var(--r-pill); background: var(--c-primary); color: #fff; font-weight: var(--fw-bold); }
.cn-steps__item h3 { margin: 0 0 4px; font-size: 1.08rem; color: var(--c-primary); }
.cn-steps__item p { margin: 0; color: var(--c-muted); line-height: 1.75; font-size: .95rem; }
@media (min-width: 900px) { .cn-steps { grid-template-columns: repeat(3, 1fr); gap: 24px; } .cn-steps__item { flex-direction: column; padding: 26px; } }

/* =================== ভিডিও (CSS-এ আঁকা — "চালান" চাপার আগে ইউটিউব থেকে কিছুই নামে না) =================== */
/* হটফিক্স ৫৪: গ্রিডের বদলে ফ্লেক্স — ভিডিও যতগুলোই হোক সারিটি মাঝ বরাবর (আগে একটি ভিডিও বাঁ কোণে পড়ত); একটি হলে বড় */
.cn-videos { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; }
.cn-video { flex: 1 1 320px; width: 100%; max-width: 560px; margin: 0; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); overflow: hidden; }
.cn-video:only-child { max-width: 720px; }
.cn-video__frame { position: relative; aspect-ratio: 16 / 9; background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary)); }
.cn-video__frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.cn-video__play { position: absolute; inset: 0; width: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; background: transparent; border: 0; color: #fff; cursor: pointer; font: inherit; }
.cn-video__play:focus-visible { outline: 3px solid var(--c-focus); outline-offset: -6px; }
.cn-video__icon { width: 64px; height: 64px; border-radius: 50%; background: var(--c-accent-bright); position: relative; box-shadow: 0 8px 24px rgba(0, 0, 0, .3); transition: transform .2s; }
.cn-video__icon::after { content: ''; position: absolute; left: 25px; top: 19px; border-style: solid; border-width: 13px 0 13px 21px; border-color: transparent transparent transparent #fff; }
.cn-video__play:hover .cn-video__icon { transform: scale(1.08); }
.cn-video__label { font-weight: var(--fw-semi); font-size: .95rem; }
.cn-video figcaption { padding: 14px 16px 16px; display: grid; gap: 6px; font-size: .92rem; }
.cn-video figcaption strong { color: var(--c-primary); font-size: 1rem; }
.cn-video figcaption span { color: var(--c-muted); line-height: 1.7; }
.cn-video figcaption a { color: var(--c-accent); font-weight: var(--fw-semi); text-decoration: none; }

/* =================== দাম =================== */
.cn-plan { position: relative; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); padding: 24px 22px; display: flex; flex-direction: column; gap: 8px; overflow: hidden; }
.cn-plan::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--c-accent-bright); }
.cn-plan__name { margin: 0; font-size: 1.25rem; color: var(--c-primary); }
.cn-plan__for { margin: 0; color: var(--c-muted); font-size: .9rem; }
@media (min-width: 600px) { .cn-plan__for { min-height: 3.5em; } }
.cn-plan__price { margin: 12px 0 0; display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; }
.cn-plan__price strong { font-size: 2.1rem; line-height: 1.1; color: var(--c-text); letter-spacing: -.01em; }
.cn-plan__price span { color: var(--c-muted); font-size: .92rem; }
.cn-plan__year { margin: 0; font-size: .92rem; color: var(--c-text); }
.cn-plan__year small { color: var(--c-accent); font-weight: var(--fw-semi); font-size: .88rem; }
.cn-plan__list { list-style: none; margin: 14px 0 18px; padding: 14px 0 0; border-top: 1px solid var(--c-line-soft); display: grid; gap: 8px; align-content: start; font-size: .93rem; flex: 1; }
.cn-plan__list li { display: flex; gap: 8px; }
.cn-plan__list li::before { content: '✓'; color: var(--c-accent-bright); font-weight: var(--fw-bold); flex: none; }

/* তিন-কলাম সীমায় (ট্যাবলেট) দুই-কলাম আর বড় পর্দায় চার — কার্ডের শেষ বোতাম সবসময় নিচে */
.cn-plan .cn-btn { margin-top: auto; }

/* =================== প্রশ্নোত্তর =================== */
.cn-faq { max-width: 820px; }
.cn-faq__item { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); margin-bottom: 10px; }
.cn-faq__item summary { cursor: pointer; font-weight: var(--fw-semi); padding: 16px 48px 16px 18px; position: relative; list-style: none; }
.cn-faq__item summary::-webkit-details-marker { display: none; }
.cn-faq__item summary::after { content: '+'; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 1.4rem; color: var(--c-accent); transition: transform .2s; }
.cn-faq__item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.cn-faq__item summary:focus-visible { outline: 2px solid var(--c-focus); outline-offset: 2px; border-radius: var(--r-card); }
.cn-faq__item p { margin: 0; padding: 0 18px 18px; line-height: 1.8; color: var(--c-muted); }

/* =================== যোগাযোগ ও আহ্বান =================== */
.cn-contact { display: grid; gap: 20px; }
.cn-contact__card { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-card); padding: 26px; }
.cn-contact__card .cn-sec__title { font-size: 1.4rem; }
.cn-contact__lines { line-height: 2.1; margin: 8px 0 0; }
.cn-contact__lines a { color: var(--c-accent); font-weight: var(--fw-semi); }
.cn-contact__cta { background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary)); color: #fff; border-radius: var(--r-card); padding: 30px 26px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 6px; }
.cn-contact__cta .cn-sec__title { color: #fff; font-size: 1.55rem; }
.cn-contact__cta .cn-sec__sub { color: rgba(255, 255, 255, .88); margin-bottom: 14px; }
@media (max-width: 599px) { .cn-contact__cta .cn-btn { width: 100%; } }
@media (min-width: 900px) { .cn-contact { grid-template-columns: 1fr 1fr; gap: 24px; } .cn-contact__card, .cn-contact__cta { padding: 38px; } }

/* =================== পাদ =================== */
.cn-foot { background: var(--c-surface); border-top: 1px solid var(--c-line); padding: 40px 0 28px; font-size: .95rem; }
.cn-foot__grid { display: grid; gap: 28px; }
.cn-foot__brand p { margin: 10px 0 0; color: var(--c-muted); max-width: 340px; }
.cn-foot h4 { margin: 0 0 10px; font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; color: var(--c-muted); }
.cn-foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.cn-foot a { color: var(--c-text); text-decoration: none; }
.cn-foot a:hover { color: var(--c-accent); text-decoration: underline; }
.cn-foot__bottom { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--c-line-soft); display: flex; flex-direction: column; gap: 14px; align-items: flex-start; color: var(--c-muted); font-size: .88rem; }
@media (min-width: 760px) { .cn-foot__grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; } .cn-foot__bottom { flex-direction: row; justify-content: space-between; align-items: center; } }

/* সোশ্যাল লিংক (পাদে) */
.cn-foot .cn-social, .cn-social { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.cn-social a { display: inline-block; padding: 6px 14px; border: 1px solid var(--c-line); border-radius: var(--r-pill); font-size: .88rem; font-weight: var(--fw-semi); color: var(--c-text); background: var(--c-surface); }
.cn-social a:hover { border-color: var(--c-accent); color: var(--c-accent); text-decoration: none; }

/* ইনস্টল-ব্যানার পাতার শেষ অংশ ঢাকে না */
body.cn-has-install .cn-foot { padding-bottom: 110px; }

@media print { .cn-site__head, .cn-hero__cta, .cn-mock { display: none !important; } }


/* =====================================================================
   হটফিক্স ৬৪ — পাবলিক সাইট: হেডারের ভাষা-বোতাম, পাদের লিংক এক সারিতে, কপিরাইট মাঝে (শুধু CSS + মার্কআপ)
   রং/মাপ কেবল টোকেন। ভাষা-বোতাম লগইনের পাশে — মোবাইল ও ডেস্কটপ দুটোতেই দেখা যায়।
   ===================================================================== */
.cn-langtog { margin: 0; flex: none; }
.cn-langtog__btn {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 36px; padding: 0 var(--s-3);
  background: var(--c-surface); color: var(--c-text);
  border: 1px solid var(--c-line-strong); border-radius: var(--r-btn);
  font: inherit; font-size: var(--t-sm); font-weight: var(--fw-semi); line-height: 1; white-space: nowrap;
  cursor: pointer;
}
.cn-langtog__btn:hover { background: var(--c-accent-tint); color: var(--c-accent); border-color: var(--c-accent); }
.cn-langtog__btn:focus-visible { outline: 2px solid var(--c-focus); outline-offset: 2px; }
.cn-langtog__btn svg { flex: none; }
/* খুব সরু ফোনে হেডার যেন উপচে না পড়ে: মেনুর বর্ডার/ফাঁক ছোট, বোতাম ঠাসা */
@media (max-width: 400px) {
  .cn-site__headrow { gap: 8px; }
  .cn-site__actions { gap: 6px; }
  .cn-langtog__btn { padding: 0 var(--s-2); gap: 4px; }
  .cn-site__headrow .cn-brand { gap: 6px; }
  .cn-site__headrow .cn-wordmark { font-size: calc(19px * var(--fs)); }
  .cn-site__headrow .cn-brand .cn-brand__mark { width: 28px; height: 28px; }
}
@media (max-width: 374px) {
  .cn-site__headrow .cn-wordmark { font-size: calc(17px * var(--fs)); }
}
/* ৩৪৯px বা তার কম (পুরোনো ছোট ফোন): জায়গা নেই — কেবল লোগো-চিহ্ন; নাম স্ক্রিন-রিডারের জন্য থাকে (aria-label) */
@media (max-width: 349px) {
  .cn-site__headrow .cn-wordmark { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}

/* ফোনে পাদের "পাতা" ও "নীতি" লিংক — ওপর-নিচে নয়, এক সারিতে পাশাপাশি (জায়গা না হলে পরের সারিতে নামে) */
@media (max-width: 759px) {
  .cn-foot ul.cn-foot__links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
}
@media (max-width: 359px) {
  .cn-foot ul.cn-foot__links { gap: 6px 12px; font-size: .9rem; }
}

/* কপিরাইট (NODE CORPORATION) পাদের একদম নিচে, সবসময় মাঝ বরাবর */
.cn-foot__bottom { flex-direction: column; justify-content: center; align-items: center; text-align: center; }
@media (min-width: 760px) { .cn-foot__bottom { flex-direction: column; justify-content: center; align-items: center; } }