*{box-sizing:border-box}
:root{--blue:#0d8df3;--blue2:#0870c9;--sky:#eaf6ff;--text:#12233f;--muted:#71849a;--line:#dcecf8;--card:#fff;--bg:#f5faff}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,"Noto Sans Bengali",sans-serif;color:var(--text);background:linear-gradient(180deg,#f8fcff 0%,var(--bg) 100%);line-height:1.55;-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto}
button,input,select,textarea{font:inherit}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.narrow{width:min(760px,calc(100% - 32px));margin:0 auto}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,236,248,.95)}
.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:clamp(17px,2vw,20px);color:#0b6fc7;min-width:0}
.brand-mark{display:grid;place-items:center;flex:0 0 auto;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,#36a9ff,#0876d1);color:#fff;font-size:13px;box-shadow:0 7px 18px rgba(8,118,209,.16)}
.nav-actions{display:flex;align-items:center;justify-content:flex-end;gap:7px;flex-wrap:wrap}
.nav-link{font-weight:700;color:#31516f;padding:9px 10px}
.balance-chip{background:#eaf6ff;color:#0876d1;font-weight:800;border-radius:999px;padding:8px 13px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;font-weight:800;cursor:pointer;font-size:15px;line-height:1;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#1598ef,#0873cf);color:#fff;box-shadow:0 8px 22px rgba(8,115,207,.18)}
.btn-outline{background:#fff;color:#176ea9;border:1px solid #cfe3f2}
.btn-small{padding:10px 13px;font-size:13px}
.btn-block{width:100%}

.hero{padding:clamp(46px,7vw,82px) 0 clamp(48px,6vw,66px);background:radial-gradient(circle at 80% 8%,#dcf3ff 0,#f6fbff 42%,#fff 100%)}
.hero-inner{display:flex}
.hero-copy{width:100%;max-width:940px;margin:0 auto;text-align:center}
.eyebrow{display:inline-block;color:#0876d1;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}
.hero h1{font-size:clamp(31px,5.2vw,58px);line-height:1.1;margin:0 0 18px;letter-spacing:-1.4px}
.hero h1 span{color:#0876d1}
.hero p{max-width:700px;margin:0 auto 28px;color:#61758c;font-size:clamp(15px,1.9vw,18px)}
.welcome-box{display:flex;align-items:center;justify-content:space-between;gap:14px;max-width:780px;margin:0 auto 18px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px 18px;box-shadow:0 10px 35px rgba(31,105,156,.08);text-align:left}
.welcome-box small{display:block;color:#7b8da0;font-size:12px}
.welcome-box strong{display:block;overflow-wrap:anywhere}
.welcome-balance{font-weight:900;color:#0876d1;white-space:nowrap}

.search-card{max-width:840px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;text-align:left;box-shadow:0 18px 55px rgba(31,105,156,.11)}
.search-card label{font-weight:800;display:block;margin-bottom:9px}
.search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}
.search-row input,.form input{width:100%;min-width:0;height:50px;border:1px solid #cfe0ed;border-radius:12px;padding:0 14px;outline:none;background:#fbfdff;color:#152c44;font-size:16px}
.search-row input:focus,.form input:focus{border-color:#2b9ced;box-shadow:0 0 0 4px rgba(43,156,237,.1)}
.search-btn{min-width:156px;white-space:nowrap}
.search-meta{display:flex;justify-content:space-between;gap:10px;color:#70859a;font-size:13px;margin-top:10px}
.search-meta span:first-child{color:#0876d1;font-weight:800}

.section{padding:clamp(48px,6vw,70px) 0}
.section-head{margin-bottom:22px}
.section h2{font-size:clamp(27px,3vw,32px);margin:0}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.feature{min-width:0;background:#fff;border:1px solid #dfedf7;border-radius:18px;padding:22px;box-shadow:0 8px 28px rgba(31,105,156,.06)}
.feature-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#eaf6ff;color:#0876d1;font-weight:900;margin-bottom:15px}
.feature h3{margin:0 0 7px;font-size:18px}
.feature p{margin:0;color:#71849a;font-size:14px}

.footer{border-top:1px solid #dfedf7;background:#fff;color:#71849a;text-align:center;padding:24px 16px;font-size:13px}
.auth-section,.page-section,.result-section{padding:clamp(32px,6vw,58px) 0;min-height:calc(100vh - 140px)}
.auth-card,.card-form,.result-card{width:min(460px,100%);margin:auto;background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:0 18px 55px rgba(31,105,156,.09)}
.auth-title{text-align:center;margin-bottom:22px}
.auth-title h1,.page-heading h1,.result-card h1{margin:0 0 7px;font-size:clamp(28px,4vw,34px)}
.auth-title p,.page-heading p,.result-card p{margin:0;color:var(--muted)}
.form{display:grid;gap:15px}
.form label{font-weight:800;font-size:14px}
.form input{display:block;margin-top:7px}
.auth-foot{text-align:center;color:var(--muted);font-size:14px;margin:20px 0 0}
.auth-foot a{color:#0876d1;font-weight:800}
.alert{border-radius:12px;padding:12px 14px;margin-bottom:16px;font-size:14px}
.alert-error{background:#fff0f0;color:#b42318;border:1px solid #ffd0cc}
.alert-success{background:#effcf5;color:#067647;border:1px solid #b7ebcf}
.page-heading{margin-bottom:22px}
.payment-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:18px}
.payment-method{cursor:pointer;min-width:0;background:#fff;border:2px solid #e1edf6;border-radius:16px;padding:18px;display:grid;gap:3px;transition:.18s}
.payment-method:hover{transform:translateY(-1px)}
.payment-method.active{border-color:#1598ef;background:#f2faff;box-shadow:0 8px 25px rgba(21,152,239,.08)}
.payment-method b{font-size:19px}
.payment-method span{font-size:13px;color:#75879a}
.payment-method strong{color:#0876d1;margin-top:5px;overflow-wrap:anywhere}
.card-form{width:100%}
.result-card{text-align:center;margin-top:20px}
.result-icon{width:54px;height:54px;margin:0 auto 14px;border-radius:50%;display:grid;place-items:center;background:#eaf6ff;color:#0876d1;font-weight:900;font-size:24px}
.result-actions{display:flex;justify-content:center;gap:10px;margin-top:20px}

@media (max-width:960px){
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .container,.narrow{width:min(100% - 24px,1180px)}
  .nav{min-height:64px}
  .nav-link{display:none}
  .hero{padding-top:44px}
  .search-card{padding:18px}
  .feature-grid{gap:13px}
}
@media (max-width:560px){
  .container,.narrow{width:calc(100% - 20px)}
  .nav{gap:8px}
  .brand{font-size:16px}
  .brand-mark{width:34px;height:34px;border-radius:10px}
  .nav-actions{gap:5px}
  .balance-chip{font-size:12px;padding:7px 9px}
  .btn-small{padding:8px 9px;font-size:12px}
  .hero{padding:40px 0 46px}
  .hero h1{font-size:clamp(29px,9vw,36px);letter-spacing:-.8px;margin-bottom:14px}
  .hero p{font-size:14px;margin-bottom:22px}
  .welcome-box{align-items:flex-start;flex-direction:column;padding:14px;border-radius:15px}
  .welcome-balance{white-space:normal}
  .search-card{padding:15px;border-radius:17px}
  .search-row{grid-template-columns:1fr}
  .search-btn{width:100%;min-width:0;height:49px}
  .search-meta{font-size:12px;align-items:flex-start;flex-direction:column;gap:3px}
  .feature-grid{grid-template-columns:1fr}
  .feature{padding:18px}
  .feature h3{font-size:17px}
  .auth-section,.page-section,.result-section{padding:26px 0}
  .auth-card,.card-form,.result-card{padding:20px;border-radius:18px}
  .payment-grid{grid-template-columns:1fr;gap:10px}
  .payment-method{padding:15px}
  .result-actions{flex-direction:column}
  .result-actions .btn{width:100%}
}
@media (max-width:390px){
  .container,.narrow{width:calc(100% - 16px)}
  .nav-actions .btn-outline{display:none}
  .balance-chip{max-width:115px;overflow:hidden;text-overflow:ellipsis}
  .hero h1{font-size:29px}
  .hero p{font-size:13.5px}
  .search-card label{font-size:14px}
}
@media (max-width:340px){
  .brand{font-size:14px}
  .brand-mark{width:31px;height:31px}
  .btn-small{font-size:11px;padding:7px 8px}
}

/* Big & Smooth UI */
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.brand{font-size:clamp(19px,2.2vw,23px)}
.brand-mark{width:44px;height:44px;font-size:14px}
.btn{padding:14px 21px;font-size:16px;min-height:48px}
.btn-small{padding:11px 15px;font-size:14px;min-height:42px}
.balance-chip{padding:9px 15px;font-size:14px}
.hero h1{font-size:clamp(35px,5.5vw,64px)}
.hero p{font-size:clamp(16px,2vw,19px)}
.search-card{padding:26px}
.search-row input,.form input{height:54px;font-size:17px}
.search-btn{min-width:170px}
.search-meta{font-size:14px}
.section h2{font-size:clamp(30px,3.2vw,35px)}
.feature{padding:26px}
.feature h3{font-size:20px}
.feature p{font-size:15px}
.auth-card,.card-form,.result-card{padding:30px}
.auth-title h1,.page-heading h1,.result-card h1{font-size:clamp(31px,4.2vw,38px)}
.form label{font-size:15px}
.auth-foot{font-size:15px}
.search-card,.feature,.auth-card,.card-form,.result-card,.payment-method{transition:box-shadow .2s ease,transform .2s ease}
.search-card:hover,.auth-card:hover,.card-form:hover{box-shadow:0 22px 65px rgba(31,105,156,.13)}
@media(max-width:560px){
  .brand{font-size:17px}
  .brand-mark{width:38px;height:38px}
  .hero h1{font-size:34px}
  .hero p{font-size:15.5px}
  .search-card{padding:18px}
  .search-row input,.form input{height:54px;font-size:17px}
  .search-btn{width:100%;height:54px;font-size:16px}
  .feature{padding:20px}
  .feature h3{font-size:19px}
  .feature p{font-size:15px}
  .auth-card,.card-form,.result-card{padding:22px}
  .auth-title h1,.page-heading h1,.result-card h1{font-size:30px}
  .btn{min-height:50px}
}
@media(max-width:390px){
  .hero h1{font-size:31px}
  .hero p{font-size:15px}
  .brand-mark{width:35px;height:35px}
  .btn-small{padding:9px 11px;font-size:13px}
  .balance-chip{font-size:12px;padding:8px 10px}
}