/* =========================================================
   Taxation BD — Design Tokens
   Subject: Bangladeshi VAT / Tax / Customs reference portal.
   Direction: official gazette + document register, not a
   generic SaaS landing page. Deep flag-green + red seal accent,
   paper-white surfaces, serif "gazette" display type paired
   with a clean Bengali-friendly body face. Signature element:
   a circular official "seal" mark and perforated document
   cards that echo a challan / form counterfoil.
   ========================================================= */

:root{
  --color-bg:        #F1F3EC;
  --color-bg-soft:   #E7EBE0;
  --color-card:      #FFFFFF;
  --color-ink:       #16261C;
  --color-ink-soft:  #45564A;
  --color-line:      #CDD6C4;
  --color-line-strong:#0B3D2E;
  --color-primary:   #0B3D2E;
  --color-primary-dark:#082A20;
  --color-primary-soft:#DCE7DD;
  --color-accent:    #C21F2C;
  --color-accent-dark:#961720;
  --color-gold:      #A9782E;
  --color-gold-soft: #F1E7D2;

  --font-display: "Tiro Bangla", "Noto Serif Bengali", serif;
  --font-body: "Hind Siliguri", "Noto Sans Bengali", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --radius-s: 4px;
  --radius-m: 10px;
  --shadow-card: 0 1px 2px rgba(11,61,46,0.06), 0 6px 20px -8px rgba(11,61,46,0.18);
  --container: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--color-bg);
  color:var(--color-ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--color-primary-dark);
  line-height:1.2;
  margin:0 0 .5em;
  font-weight:700;
}
a{color:var(--color-primary);text-decoration:none;}
a:hover{color:var(--color-accent);}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;}
p{margin:0 0 1em;}
:focus-visible{outline:3px solid var(--color-gold);outline-offset:2px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--color-gold);
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--color-gold);}

/* ---------------- Top utility bar ---------------- */
.topbar{
  background:var(--color-primary-dark);
  color:#DCE7DD;
  font-size:.82rem;
}
.topbar .container{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:7px;padding-bottom:7px;flex-wrap:wrap;gap:6px;
}
.topbar a{color:#EFE6CE;}
.topbar-links{display:flex;gap:18px;flex-wrap:wrap;}
.topbar-links a{display:inline-flex;align-items:center;gap:6px;}

/* ---------------- Header / seal / nav ---------------- */
.site-header{
  background:var(--color-bg);
  border-bottom:1px solid var(--color-line);
  position:sticky;top:0;z-index:100;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;}
.seal{
  width:46px;height:46px;border-radius:50%;
  border:2px solid var(--color-primary);
  display:flex;align-items:center;justify-content:center;
  position:relative;flex:none;
  color:var(--color-primary);
  font-family:var(--font-display);font-weight:700;font-size:1.05rem;
  background:
    radial-gradient(circle at 50% 50%, transparent 60%, var(--color-primary-soft) 61%);
}
.seal::before{
  content:"";position:absolute;inset:4px;border-radius:50%;
  border:1px dashed var(--color-primary);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-family:var(--font-display);font-size:1.32rem;color:var(--color-primary-dark);}
.brand-text span{font-size:.72rem;letter-spacing:.06em;color:var(--color-ink-soft);}

.nav-toggle{
  display:none;background:none;border:1px solid var(--color-line-strong);
  border-radius:var(--radius-s);width:42px;height:38px;cursor:pointer;
  flex:none;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--color-primary);margin:4px auto;}

.main-nav > ul{
  display:flex;align-items:center;gap:2px;list-style:none;flex-wrap:wrap;
}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a,
.main-nav > ul > li > button.nav-top-link{
  display:flex;align-items:center;gap:6px;
  font-family:var(--font-body);font-weight:600;font-size:.96rem;
  color:var(--color-ink);
  padding:10px 14px;border-radius:var(--radius-s);
  background:none;border:none;cursor:pointer;
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li > button.nav-top-link:hover,
.main-nav > ul > li.open > button.nav-top-link{
  background:var(--color-primary-soft);color:var(--color-primary-dark);
}
.main-nav > ul > li.current > a{color:var(--color-accent);}
.caret{font-size:.65em;transition:transform .15s ease;}
.main-nav li.open > button .caret{transform:rotate(180deg);}

.dropdown{
  list-style:none;position:absolute;top:100%;left:0;
  background:var(--color-card);
  border:1px solid var(--color-line);
  border-top:3px solid var(--color-primary);
  border-radius:var(--radius-s);
  width:270px;padding:8px;
  box-shadow:var(--shadow-card);
  display:none;
  flex-direction:column;
  z-index:50;
}
.dropdown li{display:block;width:100%;}
.main-nav li.open > .dropdown{display:block;}
.dropdown li a{
  display:flex;align-items:baseline;gap:8px;
  padding:9px 12px;border-radius:var(--radius-s);
  font-size:.92rem;color:var(--color-ink);
}
.dropdown li a:hover{background:var(--color-bg-soft);color:var(--color-primary-dark);}
.dropdown li a .doc-count{margin-left:auto;font-family:var(--font-mono);font-size:.7rem;color:var(--color-ink-soft);}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-body);font-weight:700;font-size:.94rem;
  padding:12px 22px;border-radius:var(--radius-s);
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--color-primary);color:#fff;}
.btn-primary:hover{background:var(--color-primary-dark);color:#fff;}
.btn-accent{background:var(--color-accent);color:#fff;}
.btn-accent:hover{background:var(--color-accent-dark);color:#fff;}
.btn-outline{background:transparent;border-color:var(--color-primary);color:var(--color-primary);}
.btn-outline:hover{background:var(--color-primary);color:#fff;}
.btn-whatsapp{background:#1e7c4b;color:#fff;}
.btn-whatsapp:hover{background:#166238;color:#fff;}
.btn-sm{padding:8px 14px;font-size:.82rem;}

/* ---------------- Hero ---------------- */
.hero{
  background:
    linear-gradient(180deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color:#EFE6CE;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;border:1px dashed rgba(239,230,206,.25);
}
.hero::before{
  content:"";position:absolute;right:-40px;top:-40px;width:280px;height:280px;
  border-radius:50%;border:1px dashed rgba(239,230,206,.2);
}
.hero-inner{padding:76px 0 68px;position:relative;z-index:2;max-width:680px;}
.hero h1{color:#fff;font-size:2.5rem;margin-bottom:.4em;}
.hero p.lead{color:#D9E4D4;font-size:1.08rem;max-width:560px;}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}

/* Quick access cards on home */
.quick-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  margin-top:-52px;position:relative;z-index:3;
}
.quick-card{
  background:var(--color-card);border:1px solid var(--color-line);
  border-radius:var(--radius-m);padding:22px 20px;box-shadow:var(--shadow-card);
}
.quick-card .qc-code{
  font-family:var(--font-mono);font-size:.72rem;color:var(--color-gold);
  letter-spacing:.1em;
}
.quick-card h3{font-size:1.15rem;margin:6px 0 8px;}
.quick-card p{font-size:.9rem;color:var(--color-ink-soft);margin-bottom:12px;}
.quick-card a.card-link{font-weight:700;font-size:.88rem;}

/* ---------------- Sections ---------------- */
.section{padding:64px 0;}
.section-alt{background:var(--color-bg-soft);}
.section-head{max-width:640px;margin-bottom:36px;}
.section-head h2{font-size:1.9rem;}

/* Page header (inner pages, like a gazette title block) */
.page-head{
  background:var(--color-primary-dark);color:#EFE6CE;padding:44px 0 38px;
  border-bottom:6px solid var(--color-gold);
}
.page-head .container{position:relative;}
.page-head h1{color:#fff;font-size:2.1rem;margin-bottom:.25em;}
.page-head p{color:#CBDACB;max-width:640px;margin:0;}
.breadcrumb{font-family:var(--font-mono);font-size:.74rem;color:var(--color-gold);margin-bottom:14px;letter-spacing:.05em;}
.breadcrumb a{color:var(--color-gold);}

/* ---------------- Category tab list (Vat/Tax landing) ---------------- */
.cat-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.cat-item{
  background:var(--color-card);border:1px solid var(--color-line);
  border-left:4px solid var(--color-primary);
  border-radius:var(--radius-s);padding:20px 22px;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  box-shadow:var(--shadow-card);
}
.cat-item h3{font-size:1.05rem;margin:0 0 4px;}
.cat-item p{margin:0;font-size:.84rem;color:var(--color-ink-soft);}
.cat-item .go{font-family:var(--font-mono);font-size:.78rem;font-weight:700;white-space:nowrap;}

/* ---------------- Document / PDF list (perforated ticket look) ---------------- */
.doc-list{list-style:none;display:flex;flex-direction:column;gap:12px;}
.doc-row{
  background:var(--color-card);
  border:1px solid var(--color-line);
  border-radius:var(--radius-s);
  display:flex;align-items:center;gap:16px;
  padding:16px 18px;
  position:relative;
}
.doc-row::before{
  content:"";position:absolute;left:-1px;top:0;bottom:0;width:0;
  border-left:2px dashed var(--color-line);
}
.doc-icon{
  width:42px;height:48px;flex:none;border-radius:4px;
  background:var(--color-accent);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:700;font-size:.62rem;
}
.doc-info{flex:1;min-width:0;}
.doc-info .doc-code{font-family:var(--font-mono);font-size:.72rem;color:var(--color-gold);letter-spacing:.06em;}
.doc-info h4{margin:2px 0 2px;font-size:1rem;font-family:var(--font-body);color:var(--color-ink);}
.doc-info p{margin:0;font-size:.82rem;color:var(--color-ink-soft);}
.doc-actions{flex:none;}

.excel-note{
  margin-top:28px;background:var(--color-gold-soft);
  border:1px solid var(--color-gold);border-radius:var(--radius-m);
  padding:20px 22px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  justify-content:space-between;
}
.excel-note p{margin:0;font-size:.92rem;color:#4A3A16;max-width:520px;}
.excel-note strong{color:var(--color-accent-dark);}

/* ---------------- Training ---------------- */
.training-block{
  background:var(--color-card);border:1px solid var(--color-line);
  border-radius:var(--radius-m);padding:28px;margin-bottom:20px;box-shadow:var(--shadow-card);
}
.training-block h3{display:flex;align-items:center;gap:10px;}
.training-block .badge{
  font-family:var(--font-mono);font-size:.68rem;background:var(--color-primary-soft);
  color:var(--color-primary-dark);padding:3px 9px;border-radius:20px;
}
.notice-list{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:14px;}
.notice-list li{
  padding:12px 14px;border:1px solid var(--color-line);border-radius:var(--radius-s);
  font-size:.9rem;display:flex;justify-content:space-between;gap:10px;background:var(--color-bg);
}
.notice-list .date{font-family:var(--font-mono);font-size:.72rem;color:var(--color-ink-soft);white-space:nowrap;}

/* ---------------- Share market links ---------------- */
.link-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.link-card{
  background:var(--color-card);border:1px solid var(--color-line);border-radius:var(--radius-m);
  padding:26px;text-align:center;box-shadow:var(--shadow-card);
}
.link-card .mark{
  width:52px;height:52px;border-radius:50%;background:var(--color-primary-soft);
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;
  font-family:var(--font-display);color:var(--color-primary-dark);font-weight:700;
}
.link-card h3{margin-bottom:6px;}
.link-card p{font-size:.85rem;color:var(--color-ink-soft);margin-bottom:16px;}

/* ---------------- Ask & Answer (Analysis) ---------------- */
.qa-form{
  background:var(--color-card);border:1px solid var(--color-line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-card);margin-bottom:30px;
}
.qa-form label{display:block;font-size:.82rem;font-weight:700;margin-bottom:6px;color:var(--color-primary-dark);}
.qa-form input[type=text],
.qa-form textarea{
  width:100%;padding:11px 13px;border:1px solid var(--color-line);border-radius:var(--radius-s);
  font-family:var(--font-body);font-size:.94rem;margin-bottom:14px;background:var(--color-bg);
}
.qa-form textarea{min-height:100px;resize:vertical;}
.qa-list{display:flex;flex-direction:column;gap:16px;}
.qa-item{
  background:var(--color-card);border:1px solid var(--color-line);border-radius:var(--radius-m);
  padding:20px 22px;box-shadow:var(--shadow-card);
}
.qa-item .qa-meta{font-family:var(--font-mono);font-size:.7rem;color:var(--color-ink-soft);margin-bottom:6px;display:flex;gap:10px;}
.qa-item h4{margin:0 0 8px;font-size:1.02rem;font-family:var(--font-body);color:var(--color-ink);}
.qa-item .qa-body{font-size:.92rem;color:var(--color-ink-soft);margin-bottom:12px;}
.qa-comments{list-style:none;border-top:1px dashed var(--color-line);padding-top:12px;display:flex;flex-direction:column;gap:10px;}
.qa-comments li{font-size:.86rem;background:var(--color-bg);padding:9px 12px;border-radius:var(--radius-s);}
.qa-comments li b{color:var(--color-primary-dark);}
.qa-comment-form{display:flex;gap:8px;margin-top:12px;}
.qa-comment-form input{flex:1;padding:9px 11px;border:1px solid var(--color-line);border-radius:var(--radius-s);font-family:var(--font-body);}
.qa-empty{font-size:.88rem;color:var(--color-ink-soft);font-style:italic;}

/* ---------------- Sales & Buy ---------------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.product-card{
  background:var(--color-card);border:1px solid var(--color-line);border-radius:var(--radius-m);
  overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
}
.product-thumb{
  height:140px;display:flex;align-items:center;justify-content:center;
  font-size:2.4rem;background:var(--color-primary-soft);
}
.product-body{padding:16px;display:flex;flex-direction:column;flex:1;gap:6px;}
.product-body .p-tag{font-family:var(--font-mono);font-size:.68rem;color:var(--color-gold);letter-spacing:.06em;}
.product-body h3{font-size:1rem;margin:0;}
.product-body p{font-size:.82rem;color:var(--color-ink-soft);margin:0;flex:1;}
.product-price{font-weight:700;color:var(--color-accent-dark);font-family:var(--font-mono);}
.product-body .btn{margin-top:8px;width:100%;}

/* ---------------- Footer ---------------- */
.site-footer{background:var(--color-primary-dark);color:#C6D5C6;margin-top:60px;}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;
  padding:52px 0 30px;
}
.footer-grid h4{color:#EFE6CE;font-size:.95rem;margin-bottom:14px;font-family:var(--font-body);}
.footer-grid ul{list-style:none;display:flex;flex-direction:column;gap:8px;}
.footer-grid a{color:#C6D5C6;font-size:.88rem;}
.footer-grid a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:18px 0;
  font-size:.78rem;color:#93A793;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;align-items:center;
}
.lang-switch{
  display:inline-flex;border:1px solid rgba(255,255,255,.25);border-radius:20px;overflow:hidden;flex:none;
}
.lang-switch button{
  border:none;background:transparent;color:#C6D5C6;font-family:var(--font-body);
  font-size:.78rem;font-weight:700;padding:6px 14px;cursor:pointer;
}
.lang-switch button.active{background:var(--color-gold);color:#2A2007;}
.lang-switch button:not(.active):hover{color:#fff;}

/* Floating WhatsApp button */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:200;
  width:58px;height:58px;border-radius:50%;background:#1e7c4b;color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(0,0,0,.25);
  font-size:1.6rem;
}
.wa-float:hover{background:#166238;color:#fff;}

/* ---------------- Misc ---------------- */
.prose h2{margin-top:1.4em;}
.prose p{color:var(--color-ink-soft);}
.stat-row{display:flex;gap:36px;margin-top:30px;flex-wrap:wrap;}
.stat-row .stat b{display:block;font-family:var(--font-display);font-size:1.7rem;color:var(--color-primary-dark);}
.stat-row .stat span{font-size:.78rem;color:var(--color-ink-soft);}

.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.team-card{background:var(--color-card);border:1px solid var(--color-line);border-radius:var(--radius-m);padding:22px;text-align:center;box-shadow:var(--shadow-card);}
.team-card .avatar{width:64px;height:64px;border-radius:50%;background:var(--color-primary-soft);margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);color:var(--color-primary-dark);font-size:1.3rem;}

/* ---------------- Responsive ---------------- */
@media (max-width: 960px){
  .quick-grid{grid-template-columns:1fr;margin-top:24px;}
  .cat-list{grid-template-columns:1fr;}
  .link-cards{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .team-grid{grid-template-columns:1fr;}
}
@media (max-width: 760px){
  .nav-toggle{display:block;}
  .main-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:var(--color-card);border-bottom:1px solid var(--color-line);
    padding:10px 16px 18px;
  }
  .main-nav.open{display:block;}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav > ul > li > a, .main-nav > ul > li > button.nav-top-link{width:100%;justify-content:space-between;}
  .dropdown{position:static;box-shadow:none;border:none;border-left:2px solid var(--color-primary-soft);margin:2px 0 6px 10px;display:none;}
  .main-nav li.open > .dropdown{display:block;}
  .hero-inner{padding:52px 0 90px;}
  .hero h1{font-size:1.9rem;}
  .footer-grid{grid-template-columns:1fr;padding:36px 0 20px;}
  .product-grid{grid-template-columns:1fr;}
}