/* ===========================================================
   IECC Bangladesh — design tokens
   Direction: the study-abroad journey as a travel document.
   Passport-cover green, foil-stamp brass, visa-approved red.
   =========================================================== */

*,*::before,*::after{box-sizing:border-box}
html,body{max-width:100%;overflow-x:clip}
html{scroll-behavior:smooth}
body{margin:0}
img,svg,video{max-width:100%;height:auto;display:block}
ul,ol{list-style:none;margin:0;padding:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}

:root{
  /* --- color: passport / travel-document palette --- */
  --ink:        #0E2F24;   /* passport-cover green, primary dark */
  --ink-2:      #143C2E;   /* panel green, one step lighter */
  --ink-3:      #1B4A38;   /* border/hover green */
  --paper:      #FAF6EB;   /* official paper, light sections */
  --paper-2:    #F1EAD7;   /* paper shadow / card on paper */
  --brass:      #C08A2E;   /* foil stamp accent */
  --brass-light:#E4B65C;
  --brass-soft: rgba(192,138,46,.16);
  --stamp:      #C1272D;   /* visa-approved stamp red */
  --stamp-dark: #9E1D22;
  --ivory:      #F4F1E6;   /* text on dark */
  --muted:      #9FB3A9;   /* secondary text on dark */
  --muted-2:    #6B7A73;   /* secondary text on paper */
  --line:       rgba(244,241,230,.14); /* hairline on dark */
  --line-paper: rgba(14,47,36,.12);    /* hairline on paper */

  /* --- type --- */
  --f-display: 'Fraunces', 'Noto Serif Bengali', Georgia, serif;
  --f-body:    'Inter', 'Noto Sans Bengali', 'Segoe UI', sans-serif;
  --f-mono:    'IBM Plex Mono', 'Noto Sans Bengali', monospace;

  /* --- shape / motion --- */
  --radius: 18px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.22,.68,.32,1);

  /* --- layout --- */
  --wrap: 1240px;
  --gutter: clamp(20px, 5vw, 48px);
}

html[lang="bn"] body, body.lang-bn-active{ font-family: var(--f-body); }

body{
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- bilingual toggle: default Bangla, switch to English ---------- */
.bn{display:inline}
.en{display:none}
html.lang-en .bn{display:none}
html.lang-en .en{display:inline}
html.lang-en .en.block{display:block}
.bn.block{display:block}

/* ---------- layout helpers ---------- */
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 var(--gutter); width:100%;}
.section{padding: clamp(56px, 9vw, 120px) 0;}
.section-paper{background:var(--paper); color:var(--ink);}
.section-paper .muted{color:var(--muted-2);}
.grid{display:grid; gap:clamp(16px,2.4vw,28px);}

/* generic responsive grid: fills, never forces overflow */
.grid-auto{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: clamp(16px,2.4vw,28px);
}

/* ---------- type scale ---------- */
h1,h2,h3,h4{font-family:var(--f-display); font-weight:600; line-height:1.08; letter-spacing:-.01em; margin:0;}
html.lang-bn h1, html:not(.lang-en) h1, html.lang-bn h2, html:not(.lang-en) h2, html.lang-bn h3, html:not(.lang-en) h3{font-family:'Noto Serif Bengali', var(--f-display);}
p{margin:0;}
.eyebrow{
  font-family:var(--f-mono); font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--brass); display:inline-flex; align-items:center; gap:10px;
}
.eyebrow::before{content:''; width:22px; height:1px; background:var(--brass);}
.section-paper .eyebrow{color:var(--stamp-dark);}
.section-paper .eyebrow::before{background:var(--stamp-dark);}
.h-display{font-size:clamp(34px,6vw,64px);}
.h-section{font-size:clamp(28px,4.4vw,44px);}
.h-card{font-size:clamp(19px,2.6vw,22px);}
.lede{font-size:clamp(16px,2vw,19px); color:var(--muted); max-width:60ch; line-height:1.7;}
.section-paper .lede{color:var(--muted-2);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding: 15px 28px; border-radius: 999px; font-weight:700; font-size:14.5px;
  letter-spacing:.01em; white-space:normal; text-align:center; transition:.25s var(--ease);
  line-height:1.2;
}
.btn-stamp{background:var(--stamp); color:#fff; box-shadow:0 10px 30px -12px rgba(193,39,45,.7);}
.btn-stamp:hover{background:var(--stamp-dark); transform:translateY(-2px);}
.btn-brass{background:var(--brass); color:var(--ink);}
.btn-brass:hover{background:var(--brass-light); transform:translateY(-2px);}
.btn-ghost{border:1.5px solid var(--line); color:var(--ivory);}
.btn-ghost:hover{border-color:var(--brass); color:var(--brass-light);}
.section-paper .btn-ghost{border-color:var(--line-paper); color:var(--ink);}
.section-paper .btn-ghost:hover{border-color:var(--stamp); color:var(--stamp);}
.btn-row{display:flex; flex-wrap:wrap; gap:14px; align-items:center;}
:focus-visible{outline:2.5px solid var(--brass-light); outline-offset:3px;}

/* ---------- top notice bar ---------- */
.topbar{background:var(--ink-2); border-bottom:1px solid var(--line); font-size:14.5px;}
@media(max-width:899px){
  .topbar-desktop-only{display:none;}
  .topbar-mobile-only{display:block;}
}
@media(min-width:900px){
  .topbar-mobile-only{display:none;}
}
.topbar-in{
  max-width:var(--wrap); margin:0 auto; padding:9px var(--gutter);
  display:flex; flex-wrap:wrap; gap:10px 22px; align-items:center; justify-content:space-between;
}
.topbar-left{display:flex; flex-wrap:wrap; gap:8px 20px; color:var(--muted);}
.topbar-left span{display:inline-flex; align-items:center; gap:6px;}
.topbar-right{display:flex; gap:16px; align-items:center;}
.topbar-right a{color:var(--muted); transition:color .2s;}
.topbar-right a:hover{color:var(--brass-light);}

/* ---------- nav ---------- */
.nav{position:sticky; top:0; z-index:1000; background:rgba(14,47,36,.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--line);}
.nav-in{max-width:var(--wrap); margin:0 auto; padding:14px var(--gutter); display:flex; align-items:center; gap:18px;}
.brand{display:flex; align-items:center; gap:10px; margin-right:auto;}
.brand-logo{height:56px; width:auto; max-width:180px; object-fit:contain; flex-shrink:0;}
@media(max-width:420px){.brand-logo{height:46px;}}

.nav-links{display:none; align-items:center; gap:2px;}
.nav-links a{padding:9px 14px; border-radius:8px; font-size:14px; font-weight:600; color:var(--muted); transition:.2s;}
.nav-links a:hover, .nav-links a.is-active{color:var(--ivory); background:var(--line);}

.lang-toggle{display:inline-flex; background:var(--ink-3); border-radius:999px; padding:3px; gap:2px; flex-shrink:0;}
.lang-toggle button{padding:7px 14px; border-radius:999px; font-size:12px; font-weight:700; color:var(--ivory); background:var(--ink-3); transition:.2s;}
.lang-toggle button.is-active{background:var(--brass); color:var(--ink);}

.nav-cta{display:none;}
.nav-burger{
  width:42px; height:42px; border-radius:10px; border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.nav-burger span{display:block; width:18px; height:2px; background:var(--ivory); position:relative;}
.nav-burger span::before,.nav-burger span::after{content:''; position:absolute; left:0; width:18px; height:2px; background:var(--ivory);}
.nav-burger span::before{top:-6px;} .nav-burger span::after{top:6px;}

@media(min-width:900px){
  .nav-links{display:flex;}
  .nav-cta{display:inline-flex;}
  .nav-burger{display:none;}
}

/* ---------- mobile menu ---------- */
.mmenu{position:fixed; inset:0; background:var(--ink); z-index:1200; display:none; flex-direction:column; padding:20px var(--gutter) 40px; overflow-y:auto;}
.mmenu.is-open{display:flex;}
.mmenu-top{display:flex; align-items:center; justify-content:space-between; margin-bottom:30px;}
.mmenu-close{width:42px; height:42px; border-radius:10px; border:1px solid var(--line); font-size:20px; color:var(--ivory);}
.mmenu a{display:block; padding:16px 0; border-bottom:1px solid var(--line); font-family:var(--f-display); font-size:24px; color:var(--ivory);}
.mmenu .btn{margin-top:24px; width:100%;}

/* ---------- footer ---------- */
.footer{background:var(--ink-2); padding-top:clamp(48px,7vw,88px); padding-bottom:clamp(90px,14vw,110px); border-top:1px solid var(--line);}
.footer-grid{display:grid; gap:36px; grid-template-columns:1fr;}
.footer-col h5{font-family:var(--f-mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--brass-light); margin-bottom:16px;}
.footer-col a, .footer-col p{color:var(--muted); font-size:14px; line-height:1.9; display:block;}
.footer-col a:hover{color:var(--brass-light);}
.footer-bottom{border-top:1px solid var(--line); margin-top:44px; padding:22px 0; font-size:12.5px; color:var(--muted); display:flex; flex-wrap:wrap; gap:10px 20px; justify-content:space-between;}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:980px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr 1fr;}}

/* ---------- flags ---------- */
.flag{display:inline-block; border-radius:3px; box-shadow:0 0 0 1px rgba(255,255,255,.2); object-fit:cover; flex-shrink:0; background:rgba(244,241,230,.08);}
.flag-sm{width:22px; height:16px;}
.flag-md{width:34px; height:25px;}
.flag-lg{width:52px; height:38px; border-radius:5px;}

/* ---------- perforation / boarding-pass signature ---------- */
.perf{position:relative;}
.perf::after{
  content:''; position:absolute; left:0; right:0; bottom:-1px; height:2px;
  background-image: radial-gradient(circle, var(--ink) 2.5px, transparent 2.6px);
  background-size: 16px 2px; background-repeat:repeat-x;
}
.tickmark{font-family:var(--f-mono); font-size:11px; letter-spacing:.1em; color:var(--brass); text-transform:uppercase;}

/* ---------- skip link, a11y ---------- */
.skip-link{position:absolute; left:-999px; top:0; background:var(--brass); color:var(--ink); padding:12px 20px; z-index:2000; border-radius:0 0 10px 0;}
.skip-link:focus{left:0;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important;}
}

/* ---------- floating contact ---------- */
.float-stack{position:fixed; right:16px; bottom:16px; z-index:900; display:flex; flex-direction:column; gap:10px; align-items:flex-end;}
.float-btn{display:inline-flex; align-items:center; gap:8px; padding:13px 18px; border-radius:999px; font-weight:700; font-size:13.5px; box-shadow:0 10px 28px -10px rgba(0,0,0,.6);}
.float-wa{background:#25D366; color:#06210f;}
.float-call{background:var(--stamp); color:#fff;}