/* SR Tech Digital BD — public site */
@font-face{font-family:Poppins;src:url(../fonts/Poppins-Medium.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:Poppins;src:url(../fonts/Poppins-SemiBold.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:Poppins;src:url(../fonts/Poppins-Bold.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:Poppins;src:url(../fonts/Poppins-MediumItalic.woff2) format("woff2");font-weight:500;font-style:italic;font-display:swap}
@font-face{font-family:Hind;src:url(../fonts/HindSiliguri-SemiBold.woff2) format("woff2");font-weight:500 600;font-display:swap}
@font-face{font-family:Hind;src:url(../fonts/HindSiliguri-Bold.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:Baloo;src:url(../fonts/BalooDa2.woff2) format("woff2");font-weight:400 800;font-display:swap}

:root{
  --bg:#030820; --bg2:#071234; --panel:rgba(12,24,66,.62); --panel-solid:#0c1842; --line:rgba(140,175,255,.16);
  --text:#f3f6ff; --muted:#a9b6dc; --blue:#1f6cf0; --blue-l:#5aa2ff; --orange:#ff6a13; --amber:#ffab2e;
  --green:#3ee08f; --red:#ff5d6c; --r:22px; --gut:16px;
  --font:Poppins,Hind,system-ui,sans-serif; --display:Poppins,Baloo,system-ui,sans-serif;
  color-scheme:dark;
}
html[lang=bn]{--font:Hind,Poppins,system-ui,sans-serif;--display:Baloo,Hind,Poppins,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;overflow-x:hidden;min-height:100vh}
img{max-width:100%;display:block}
a{color:var(--blue-l)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.grad{background:linear-gradient(90deg,var(--amber),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.or{color:var(--orange)} .bl{color:var(--blue-l)} .muted{color:var(--muted)}
[data-lang-only]{display:none} html[lang=en] [data-lang-only=en], html[lang=bn] [data-lang-only=bn]{display:revert}

/* ---------- background: sphere canvas + fallback ---------- */
#sphere{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.bg-fallback{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
   radial-gradient(55% 55% at 72% 45%,rgba(31,108,240,.35),transparent 70%),
   radial-gradient(40% 45% at 20% 95%,rgba(255,106,19,.20),transparent 70%),
   linear-gradient(170deg,#081640,var(--bg) 60%,#01040f)}
.bg-dots{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.08;
  background-image:radial-gradient(circle,#8fb4ff 1px,transparent 1.5px);background-size:20px 20px}

/* ---------- header ---------- */
.topbar{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;gap:18px;
  padding:12px clamp(var(--gut),3vw,40px);background:linear-gradient(180deg,rgba(3,8,32,.92),rgba(3,8,32,.55));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand img{height:42px;width:auto}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{color:var(--text);text-decoration:none;font-size:14px;font-weight:500;padding:8px 12px;border-radius:999px;opacity:.85;white-space:nowrap}
.nav a:hover,.nav a.active{opacity:1;background:rgba(255,255,255,.08)}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;flex:none}
.lang button{background:none;border:0;padding:6px 12px;font-size:13px;font-weight:600;cursor:pointer;color:var(--muted)}
.lang button[aria-pressed=true]{background:var(--orange);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:12px;width:42px;height:42px;cursor:pointer}

/* ask bar */
.ask{position:relative;flex:1;min-width:0;max-width:420px;margin-left:12px}
.ask form{display:flex;align-items:center;background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:999px;padding:4px 4px 4px 16px}
.ask form:focus-within{border-color:var(--blue-l);box-shadow:0 0 0 4px rgba(90,162,255,.15)}
.ask input{flex:1;min-width:0;background:none;border:0;outline:0;font-size:14px;padding:6px 0}
.ask input::placeholder{color:var(--muted)}
.ask button{flex:none;border:0;border-radius:999px;background:linear-gradient(90deg,var(--orange),#ff8a1f);color:#fff;width:36px;height:36px;cursor:pointer;display:grid;place-items:center}
.ask-panel{position:absolute;top:calc(100% + 10px);left:0;right:0;background:var(--panel-solid);border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:0 20px 60px rgba(0,0,0,.5);font-size:14.5px;display:none}
.ask-panel.open{display:block}
.ask-panel .q{color:var(--muted);font-size:13px;margin-bottom:6px}
.ask-panel .a{white-space:pre-wrap}
.ask-panel .actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.ask-panel .close{position:absolute;right:10px;top:8px;background:none;border:0;color:var(--muted);cursor:pointer;font-size:18px}
.typing span{display:inline-block;width:6px;height:6px;margin-right:4px;border-radius:50%;background:var(--blue-l);animation:blink 1s infinite}
.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}
@keyframes blink{50%{opacity:.2}}

/* ---------- world / sections ---------- */
main{position:relative;z-index:1}
.world{perspective:1400px}
.sec{min-height:100vh;display:flex;align-items:center;padding:110px clamp(var(--gut),5vw,80px) 70px;position:relative}
.sec-inner{width:100%;max-width:1200px;margin:0 auto;transform-origin:50% 50% -900px;will-change:transform,opacity}
.kicker{display:flex;align-items:center;gap:14px;font-size:13px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;color:var(--muted)}
.kicker::before{content:"";width:44px;height:3px;border-radius:2px;background:var(--orange)}
h1,h2,h3{font-family:var(--display);line-height:1.08;margin:0}
h1{font-size:clamp(40px,6.4vw,88px);font-weight:700;letter-spacing:-.01em;margin-top:18px}
h2{font-size:clamp(32px,4.4vw,58px);font-weight:700;margin-top:14px}
h3{font-size:20px;font-weight:700}
.lead{font-size:clamp(16px,1.5vw,19px);color:var(--muted);max-width:620px;margin-top:16px}
.bn-slogan{font-family:Baloo,Hind,sans-serif;font-weight:700;font-size:clamp(24px,3vw,40px);line-height:1.25;margin-top:20px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;border-radius:999px;font-weight:600;font-size:16px;padding:14px 26px;
  text-decoration:none;border:0;cursor:pointer;white-space:nowrap;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:linear-gradient(90deg,var(--orange),#ff8a1f);color:#fff;box-shadow:0 10px 34px rgba(255,106,19,.42)}
.btn.ghost{background:rgba(255,255,255,.06);border:1.5px solid rgba(255,255,255,.3);color:#fff}
.btn.wa{background:#1faa59;color:#fff;box-shadow:0 10px 30px rgba(31,170,89,.35)}
.btn.sm{font-size:14px;padding:9px 16px}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.row{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}

.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center}
.screen-wrap{position:relative}
.screen{position:relative;aspect-ratio:16/9;border-radius:14px;padding:12px;background:linear-gradient(180deg,#2a3245,#0f131d);
  box-shadow:0 0 0 2px #3a4462 inset,0 40px 90px rgba(0,0,0,.6),0 0 140px rgba(90,162,255,.35)}
.screen .lcd{position:relative;width:100%;height:100%;border-radius:6px;overflow:hidden;background:#000}
.screen .lcd::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:3;
  background:radial-gradient(circle,transparent 45%,rgba(0,0,0,.28) 62%) 0 0/5px 5px,linear-gradient(115deg,rgba(255,255,255,.14),transparent 38%)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1s}
.slide.on{opacity:1}
.slide .bgblur{position:absolute;inset:-20px;background-size:cover;background-position:center;filter:blur(18px) brightness(.6)}
.slide img{position:relative;width:100%;height:100%;object-fit:contain}
.slide a{position:absolute;inset:0;z-index:4}
.screen-pole{width:56px;height:90px;margin:0 auto;background:linear-gradient(90deg,#141a28,#3b445c 45%,#141a28)}
.dots-nav{display:flex;gap:8px;justify-content:center;margin-top:14px}
.dots-nav button{width:9px;height:9px;border-radius:50%;border:0;background:rgba(255,255,255,.3);cursor:pointer;padding:0}
.dots-nav button.on{background:var(--orange);width:24px;border-radius:6px}
.live{position:absolute;top:22px;left:22px;z-index:5;font-size:12px;font-weight:600;letter-spacing:.12em;background:rgba(0,0,0,.55);padding:4px 10px;border-radius:999px}
.live::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--red);margin-right:6px;animation:blink 1.2s infinite}

/* features */
.feat .ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:rgba(31,108,240,.2);border:1px solid rgba(90,162,255,.35);margin-bottom:16px}
.feat p{color:var(--muted);margin:8px 0 0;font-size:15px}
.steps{counter-reset:s}
.steps .card{position:relative;padding-top:56px}
.steps .card::before{counter-increment:s;content:counter(s);position:absolute;top:18px;left:24px;font-family:var(--display);font-weight:700;font-size:26px;color:var(--orange)}

/* billboards */
.bb-card{overflow:hidden;padding:0;display:flex;flex-direction:column}
.bb-card .ph{aspect-ratio:16/10;background:#0a1236 center/cover;position:relative;display:grid;place-items:center;color:var(--muted)}
.bb-card .ph img{width:100%;height:100%;object-fit:cover}
.bb-card .body{padding:20px 22px 22px}
.badge{display:inline-block;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;background:rgba(62,224,143,.15);color:var(--green);border:1px solid rgba(62,224,143,.35)}
.badge.soon{background:rgba(255,171,46,.15);color:var(--amber);border-color:rgba(255,171,46,.4)}

/* pricing */
.price{display:flex;flex-direction:column}
.price.featured{border-color:rgba(255,106,19,.6);box-shadow:0 0 0 1px rgba(255,106,19,.4),0 20px 60px rgba(255,106,19,.15)}
.price .amt{font-family:var(--display);font-size:42px;font-weight:700;margin:12px 0 2px}
.price .amt small{font-size:15px;color:var(--muted);font-weight:500}
.price p{color:var(--muted);flex:1}
.offer{display:flex;gap:16px;align-items:center;border-color:rgba(255,171,46,.45);background:linear-gradient(90deg,rgba(255,106,19,.16),rgba(12,24,66,.6))}
.offer .tag{flex:none;font-weight:700;font-size:13px;background:var(--orange);color:#fff;padding:6px 12px;border-radius:999px}

/* availability */
.avail-head{display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:space-between;margin-top:26px}
.legend{display:flex;gap:16px;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:6px;vertical-align:-1px}
.cal{margin-top:16px;overflow-x:auto;padding-bottom:10px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}
.cal-grid{display:grid;grid-auto-flow:column;grid-auto-columns:64px;gap:6px}
.cal-col{scroll-snap-align:start;display:grid;gap:6px}
.cal-col .d{text-align:center;font-size:11px;line-height:1.2;color:var(--muted);padding:4px 0;height:44px}
.cal-col .d b{display:block;font-size:17px;color:var(--text)}
.cal-col .d.fri b,.cal-col .d.sat b{color:var(--amber)}
.cell{height:34px;border-radius:8px;border:1px solid transparent;cursor:pointer;font-size:0}
.cell.free{background:rgba(62,224,143,.16);border-color:rgba(62,224,143,.38)}
.cell.free:hover{background:rgba(62,224,143,.35)}
.cell.booked{background:rgba(255,255,255,.06);cursor:not-allowed;background-image:repeating-linear-gradient(45deg,transparent 0 5px,rgba(255,255,255,.07) 5px 10px)}
.cell.pending{background:rgba(255,171,46,.18);border-color:rgba(255,171,46,.35);cursor:not-allowed}
.cal-labels{display:grid;gap:6px;position:sticky;left:0;z-index:2;background:linear-gradient(90deg,var(--bg2) 85%,transparent);padding-right:8px}
.cal-labels div{height:34px;font-size:12px;display:flex;align-items:center;color:var(--muted);white-space:nowrap}
.cal-labels .sp{height:44px}
.cal-wrap{display:grid;grid-template-columns:auto 1fr;gap:6px}

/* booking */
.book{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.book>*,.grid>*,.hero>*{min-width:0}
.dates{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x proximity}
.date-chip{flex:none;scroll-snap-align:start;width:68px;padding:10px 0;border-radius:14px;text-align:center;background:rgba(255,255,255,.05);border:1px solid var(--line);cursor:pointer;line-height:1.2}
.date-chip small{display:block;font-size:11px;color:var(--muted)}
.date-chip b{display:block;font-size:20px;margin:2px 0}
.date-chip[aria-pressed=true]{background:var(--orange);border-color:var(--orange)}
.date-chip[aria-pressed=true] small{color:#fff}
.date-chip[disabled]{opacity:.35;cursor:not-allowed}
.times{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:8px;margin-top:14px;max-height:300px;overflow:auto;padding-right:4px}
.time{padding:10px 0;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);cursor:pointer;font-size:14px;font-weight:600}
.time[aria-pressed=true]{background:var(--blue);border-color:var(--blue-l)}
.time[disabled]{opacity:.3;cursor:not-allowed;text-decoration:line-through}
.seg{display:flex;gap:8px;margin-top:6px}
.seg button{flex:1;padding:12px;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);cursor:pointer;font-weight:600}
.seg button[aria-pressed=true]{background:rgba(31,108,240,.3);border-color:var(--blue-l)}
label.f{display:block;margin-top:14px;font-size:14px;font-weight:500;color:var(--muted)}
label.f input,label.f textarea,label.f select{display:block;width:100%;margin-top:6px;padding:13px 15px;border-radius:12px;background:rgba(3,8,32,.6);border:1px solid var(--line);outline:0;font-size:15px;color:var(--text)}
label.f input:focus,label.f textarea:focus,label.f select:focus{border-color:var(--blue-l);box-shadow:0 0 0 4px rgba(90,162,255,.15)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.msg{margin-top:14px;padding:12px 14px;border-radius:12px;font-size:14px;display:none}
.msg.err{display:block;background:rgba(255,93,108,.14);border:1px solid rgba(255,93,108,.4);color:#ffc0c7}
.msg.ok{display:block;background:rgba(62,224,143,.14);border:1px solid rgba(62,224,143,.4);color:#bdf7d8}
.summary{margin-top:16px;padding:14px 16px;border-radius:14px;background:rgba(31,108,240,.15);border:1px solid rgba(90,162,255,.3);font-size:14px}

/* faq */
details.qa{border-bottom:1px solid var(--line);padding:4px 0}
details.qa summary{cursor:pointer;list-style:none;padding:16px 36px 16px 0;font-weight:600;font-size:17px;position:relative}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";position:absolute;right:6px;top:12px;font-size:24px;color:var(--orange);transition:transform .2s}
details.qa[open] summary::after{transform:rotate(45deg)}
details.qa p{margin:0 0 18px;color:var(--muted);white-space:pre-line}

/* contact */
.contact-list{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:14px}
.contact-list li{display:flex;gap:14px;align-items:center}
.contact-list .ci{width:44px;height:44px;flex:none;border-radius:12px;display:grid;place-items:center;background:rgba(255,106,19,.15);border:1px solid rgba(255,106,19,.35)}
.map{margin-top:18px;border-radius:16px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;background:#0a1236;display:grid;place-items:center;color:var(--muted);font-size:14px}
.map iframe{width:100%;height:100%;border:0}

/* footer */
footer.site{position:relative;z-index:1;border-top:1px solid var(--line);background:rgba(2,5,20,.85);padding:50px clamp(var(--gut),5vw,80px) 18px}
.foot{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot h4{margin:0 0 12px;font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.foot a{display:block;color:var(--text);text-decoration:none;opacity:.8;font-size:14.5px;padding:3px 0}
.foot a:hover{opacity:1;color:var(--amber)}
.foot-bottom{max-width:1200px;margin:34px auto 0;padding-top:16px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.credit{max-width:1200px;margin:10px auto 0;font-size:10px;letter-spacing:.03em;color:rgba(169,182,220,.55)}

/* WhatsApp floating */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:40;width:58px;height:58px;border-radius:50%;background:#1faa59;display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.45)}

/* section progress dots */
.progress{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:30;display:flex;flex-direction:column;gap:12px}
.progress a{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.25);display:block;transition:.2s}
.progress a.on{background:var(--orange);height:26px;border-radius:6px}

/* content pages */
.page{position:relative;z-index:1;max-width:860px;margin:0 auto;padding:130px var(--gut) 80px}
.page h1{font-size:clamp(34px,5vw,56px)}
.page h2{font-size:24px;margin-top:36px}
.page p,.page li{color:#d6def5}
.page .updated{color:var(--muted);font-size:14px;margin-top:10px}
.page .card{margin-top:24px}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav{display:none}
  .menu-btn{display:grid;place-items:center;margin-left:auto}
  .nav.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--panel-solid);padding:12px;border-bottom:1px solid var(--line)}
  .nav.open a{padding:12px 16px}
  .ask{max-width:none}
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .hero,.book,.g2,.g3{grid-template-columns:1fr}
  .hero{gap:30px}
  .progress{display:none}
  .sec{min-height:auto;padding-top:96px;padding-bottom:56px}
  .sec.first{min-height:100vh;padding-top:150px}
  .topbar{flex-wrap:wrap;gap:10px}
  .brand img{height:34px}
  .ask{order:5;flex-basis:100%;margin-left:0}
}
@media (max-width:520px){
  .g4{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .row .btn{flex:1}
  .card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}