:root {
  --bhu-green: #006a4e;
  --bhu-green-dark: #004d36;
  --bhu-gold: #f2a900;
  --bhu-gold-light: #fbbf24;
  --bhu-red: #dc2626;
  --bhu-bg: #f8fafc;
  --bhu-surface: #ffffff;
  --bhu-text: #1f2937;
  --bhu-text-secondary: #475569;
  --bhu-border: #e2e8f0;
  --bhu-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --bhu-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --font-bn: 'Nirmala UI', 'Noto Sans Bengali', 'SolaimanLipi', Arial, sans-serif;
  --font-en: 'Calibri', 'Segoe UI', Arial, sans-serif;
}

[lang="en"] { font-family: var(--font-en); }
[lang="bn"] { font-family: var(--font-bn); }

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: clip; }

body {
  font-family: var(--font-bn);
  background: var(--bhu-bg);
  color: var(--bhu-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: clip;
}

a { color: var(--bhu-green); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--bhu-green-dark); }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.content-section.special-notice.bhu-visible {
  background: #fef2f2;
}

.content-section.special-notice.bhu-visible h2,
.content-section.special-notice.bhu-visible h3 {
  display: none;
}

.content-section.special-notice.bhu-visible strong {
  display: block;
  font-size: .85rem;
  margin-bottom: 6px;
}

.content-section.special-notice.bhu-visible p {
  font-size: .75rem;
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

[lang="en"] .font-bn-only { display: none; }
[lang="bn"] .font-en-only { display: none; }