/* DigiSoundBox — site styles. Concept: "your phone is the soundbox".
   Signature: a speaking device (grille + LED + waveform + multilingual readout). */

:root{
  --ink:#0B1512;        /* device bezel / darkest */
  --ink-2:#12241D;      /* raised dark surface */
  --paper:#F6F7F3;      /* page background (cool off-white, not cream) */
  --card:#FFFFFF;
  --line:#E3E6DE;
  --rupee:#0C8F4D;      /* payment green */
  --rupee-ink:#07663A;
  --signal:#16E68A;     /* live mint glow */
  --led:#FFC043;        /* soundbox LED amber */
  --muted:#5C6B63;      /* sage body-muted */
  --text:#13201A;
  --maxw:1120px;
  --r:18px;
  font-synthesis:none;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:"Space Grotesk","IBM Plex Sans",sans-serif;font-weight:700;letter-spacing:-.02em;line-height:1.05;margin:0}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

/* ---------- top nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 86%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:"Space Grotesk";font-weight:700;font-size:19px;letter-spacing:-.02em;text-decoration:none}
.brand .logo{width:30px;height:30px;flex:0 0 auto}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{text-decoration:none;color:var(--muted);font-weight:500;font-size:15px}
.nav-links a:hover{color:var(--text)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:16px;text-decoration:none;
  padding:13px 20px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,box-shadow .2s ease}
.btn:active{transform:translateY(1px)}
.btn-play{background:var(--ink);color:#fff;box-shadow:0 8px 24px -12px rgba(11,21,18,.7)}
.btn-play:hover{box-shadow:0 12px 30px -10px rgba(11,21,18,.7)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--rupee);color:var(--rupee-ink)}
.btn .store{display:flex;flex-direction:column;line-height:1.05;text-align:left}
.btn .store small{font-size:10px;font-weight:500;opacity:.8;letter-spacing:.04em;text-transform:uppercase}
.btn .store b{font-size:16px;font-weight:700}

/* ---------- hero ---------- */
.hero{padding:72px 0 40px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--rupee-ink);
  background:color-mix(in srgb,var(--signal) 18%,transparent);padding:6px 12px;border-radius:999px;margin-bottom:20px}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--rupee);box-shadow:0 0 0 4px color-mix(in srgb,var(--signal) 35%,transparent)}
.hero h1{font-size:clamp(40px,6vw,66px)}
.hero h1 .accent{color:var(--rupee)}
.hero p.lead{font-size:20px;color:var(--muted);margin:22px 0 28px;max-width:30ch}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.worksline{margin-top:22px;font-size:14px;color:var(--muted)}
.worksline b{color:var(--text);font-weight:600}

/* ---------- signature: speaking soundbox ---------- */
.device{position:relative;background:linear-gradient(170deg,var(--ink-2),var(--ink));border-radius:26px;padding:26px;
  box-shadow:0 40px 80px -40px rgba(11,21,18,.65),inset 0 1px 0 rgba(255,255,255,.05);color:#EAF2ED}
.device::after{content:"";position:absolute;inset:0;border-radius:26px;pointer-events:none;
  /* speaker-grille dots */
  background-image:radial-gradient(rgba(255,255,255,.055) 1.2px,transparent 1.3px);background-size:11px 11px;opacity:.6;mask:linear-gradient(#000,#000)}
.device-top{display:flex;align-items:center;justify-content:space-between;position:relative;z-index:1}
.device-badge{display:flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#8FA89B}
.led{width:11px;height:11px;border-radius:50%;background:var(--led);box-shadow:0 0 12px 2px var(--led)}
.readout{position:relative;z-index:1;margin:30px 0 24px;min-height:120px;display:flex;flex-direction:column;justify-content:center}
.readout .amt{font-family:"Space Grotesk";font-weight:700;font-size:clamp(30px,5vw,46px);letter-spacing:-.02em;color:#fff}
.readout .cap{color:var(--signal);font-size:14px;font-weight:600;letter-spacing:.04em;margin-top:6px}
.readout .line{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;opacity:0;transition:opacity .6s ease}
.readout .line.on{opacity:1;position:relative}
/* equalizer */
.eq{position:relative;z-index:1;display:flex;align-items:flex-end;gap:5px;height:48px}
.eq span{flex:1;background:linear-gradient(var(--signal),var(--rupee));border-radius:3px;height:30%;transform-origin:bottom;animation:eq 1.1s ease-in-out infinite}
.eq span:nth-child(2){animation-delay:.12s}
.eq span:nth-child(3){animation-delay:.24s}
.eq span:nth-child(4){animation-delay:.36s}
.eq span:nth-child(5){animation-delay:.48s}
.eq span:nth-child(6){animation-delay:.6s}
.eq span:nth-child(7){animation-delay:.72s}
.eq span:nth-child(8){animation-delay:.84s}
.eq span:nth-child(9){animation-delay:.96s}
.eq span:nth-child(10){animation-delay:.3s}
.eq span:nth-child(11){animation-delay:.5s}
.eq span:nth-child(12){animation-delay:.7s}
@keyframes eq{0%,100%{height:22%}50%{height:96%}}

/* ---------- statement band ---------- */
.band{background:var(--ink);color:#EAF2ED;margin-top:24px}
.band .wrap{padding:40px 24px;display:flex;flex-wrap:wrap;gap:16px 48px;align-items:baseline;justify-content:center;text-align:center}
.band b{font-family:"Space Grotesk";font-size:clamp(24px,3.4vw,34px);color:#fff}
.band .hl{color:var(--signal)}

/* ---------- sections ---------- */
section{padding:84px 0}
.sec-head{max-width:40ch;margin-bottom:44px}
.sec-head .tag{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--rupee)}
.sec-head h2{font-size:clamp(28px,4vw,42px);margin-top:10px}
.sec-head p{color:var(--muted);margin:14px 0 0}

/* feature grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;transition:border-color .2s ease,transform .2s ease}
.feat:hover{border-color:color-mix(in srgb,var(--rupee) 45%,var(--line));transform:translateY(-3px)}
.feat .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:color-mix(in srgb,var(--signal) 16%,transparent);color:var(--rupee-ink);margin-bottom:16px}
.feat h3{font-size:19px}
.feat p{color:var(--muted);font-size:15.5px;margin:8px 0 0}

/* works-with chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:9px 16px;font-weight:600;font-size:14px;color:var(--text)}
.chip.dim{color:var(--muted);font-weight:500}

/* languages */
.langs{display:flex;flex-wrap:wrap;gap:12px}
.lang{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px;min-width:120px}
.lang .native{font-size:21px;font-weight:600}
.lang .en{font-size:13px;color:var(--muted);margin-top:2px}

/* steps (a real sequence → numbered) */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.step{position:relative;padding-top:18px;border-top:2px solid var(--line)}
.step::before{counter-increment:s;content:"0" counter(s);font-family:"IBM Plex Mono";font-weight:600;font-size:14px;color:var(--rupee);display:block;margin-bottom:10px}
.step h3{font-size:18px}
.step p{color:var(--muted);font-size:15px;margin:6px 0 0}

/* CTA closing */
.closer{background:linear-gradient(170deg,var(--ink-2),var(--ink));border-radius:26px;color:#EAF2ED;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.closer h2{font-size:clamp(28px,4vw,40px);color:#fff}
.closer p{color:#9FB6AA;max-width:46ch;margin:14px auto 26px}
.closer .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.closer .btn-play{background:var(--signal);color:var(--ink)}

/* footer */
footer{border-top:1px solid var(--line);padding:46px 0;margin-top:20px}
footer .wrap{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:center}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{color:var(--muted);text-decoration:none;font-size:15px}
.foot-links a:hover{color:var(--rupee-ink)}
.foot-note{color:var(--muted);font-size:13.5px}

/* ---------- content pages (privacy/support) ---------- */
.doc{max-width:760px;margin:0 auto;padding:60px 24px 20px}
.doc .tag{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--rupee)}
.doc h1{font-size:clamp(32px,5vw,46px);margin:10px 0 6px}
.doc .updated{color:var(--muted);font-size:14px;margin-bottom:34px}
.doc h2{font-size:22px;margin:38px 0 10px}
.doc h3{font-size:17px;margin:22px 0 6px}
.doc p,.doc li{color:#28352E;font-size:16.5px}
.doc ul{padding-left:22px}.doc li{margin:7px 0}
.doc a{color:var(--rupee-ink);font-weight:600}
.callout{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--led);border-radius:12px;padding:16px 18px;margin:22px 0}
.callout b{color:var(--text)}
.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 20px;margin-top:14px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq details:last-child{border-bottom:none}
.faq summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";color:var(--rupee);font-weight:700;margin-right:10px}
.faq details[open] summary::before{content:"–"}
.faq p{margin:12px 0 2px}

/* ---------- user guide ---------- */
.lang-toggle{display:inline-flex;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px;margin:6px 0 30px;gap:4px}
.lang-toggle button{border:none;background:transparent;font-family:"IBM Plex Sans",sans-serif;font-weight:600;font-size:15px;color:var(--muted);padding:8px 18px;border-radius:999px;cursor:pointer;transition:background .15s ease,color .15s ease}
.lang-toggle button.on{background:var(--ink);color:#fff}
.guidewrap[data-lang="en"] .only-bn{display:none}
.guidewrap[data-lang="bn"] .only-en{display:none}
.gsteps{counter-reset:g;margin:8px 0 0;padding:0;list-style:none}
.gstep{position:relative;padding:22px 0 22px 64px;border-bottom:1px solid var(--line)}
.gstep:last-child{border-bottom:none}
.gstep::before{counter-increment:g;content:counter(g);position:absolute;left:0;top:22px;width:40px;height:40px;border-radius:12px;
  background:color-mix(in srgb,var(--signal) 16%,transparent);color:var(--rupee-ink);font-family:"Space Grotesk";font-weight:700;font-size:19px;display:grid;place-items:center}
.gstep h3{font-size:20px}
.gstep p{color:#28352E;margin:7px 0 0;font-size:16.5px}
.gstep .mini{color:var(--muted);font-size:14.5px;margin-top:6px}
.voicebox{background:linear-gradient(170deg,var(--ink-2),var(--ink));color:#EAF2ED;border-radius:18px;padding:24px 24px 22px;margin:10px 0 0}
.voicebox h3{color:#fff;display:flex;align-items:center;gap:10px}
.voicebox .led{width:10px;height:10px;border-radius:50%;background:var(--led);box-shadow:0 0 10px 2px var(--led);flex:0 0 auto}
.voicebox p,.voicebox li{color:#CFE0D7;font-size:16px}
.voicebox b{color:var(--signal)}
.voicebox ul{padding-left:20px;margin:10px 0 0}
.guide-cta{margin:30px 0 6px}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .hero .wrap{grid-template-columns:1fr;gap:40px}
  .hero{padding:48px 0 20px}
  .grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .nav-links a:not(.btn){display:none}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  body{font-size:16px}
}

/* ---------- motion safety ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .eq span{animation:none;height:55%}
  .readout .line{transition:none}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important}
}