/* ============================================
   AK44 - Global Stylesheet
   Target: Bangladesh (bn-BD)
   Domain: ak44.it.com
   ============================================ */

/* --- CSS Variables / Design System --- */
:root {
  --color-primary: #1a5276;
  --color-primary-light: #2980b9;
  --color-primary-dark: #0e2f44;
  --color-secondary: #d4a017;
  --color-secondary-light: #f0c040;
  --color-accent: #e74c3c;
  --color-accent-soft: #ff6b6b;
  --color-success: #27ae60;
  --color-bg-dark: #0b1a2a;
  --color-bg-section: #f4f6f8;
  --color-bg-card: #ffffff;
  --color-bg-footer: #0d1f30;
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  --color-text-light: #cbd5e0;
  --color-text-white: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans Bengali", sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans Bengali", sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 64px;
  --spacing-xxl: 80px;
  --container-max: 1200px;
  --header-height: 70px;
  --nav-height: 48px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-light); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-secondary); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; line-height: 1.3; color: var(--color-text-primary); }
h1 { font-size: 2rem; margin-bottom: var(--spacing-md); }
h2 { font-size: 1.6rem; margin-bottom: var(--spacing-sm); margin-top: var(--spacing-lg); }
h3 { font-size: 1.25rem; margin-bottom: var(--spacing-xs); margin-top: var(--spacing-md); }
p { margin-bottom: var(--spacing-sm); }
table { width: 100%; border-collapse: collapse; margin: var(--spacing-md) 0; }
th, td { padding: 10px 14px; border: 1px solid var(--color-border); text-align: left; font-size: 0.95rem; }
th { background: var(--color-primary); color: var(--color-text-white); font-weight: 600; }
tr:nth-child(even) { background: var(--color-bg-section); }

/* --- Container --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--spacing-sm); }

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

/* ============================================
   HEADER
   ============================================ */
.site-header { background: var(--color-bg-dark); position: sticky; top: 0; z-index: 1000; box-shadow: var(--shadow-md); }
.header-main { height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-sm); }
.header-logo { display: flex; align-items: center; flex-shrink: 0; }
.header-logo svg, .header-logo img { max-height: 48px; width: auto; display: block; }
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 9px 22px; border-radius: 50px; font-size: 0.9rem; font-weight: 600; cursor: pointer; border: none; transition: all var(--transition-fast); text-decoration: none; white-space: nowrap; }
.btn-register { background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light)); color: var(--color-bg-dark); }
.btn-register:hover { background: linear-gradient(135deg, var(--color-secondary-light), var(--color-secondary)); color: var(--color-bg-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(212,160,23,0.4); }
.btn-login { background: transparent; color: var(--color-text-white); border: 2px solid var(--color-secondary); }
.btn-login:hover { background: var(--color-secondary); color: var(--color-bg-dark); transform: translateY(-1px); }

/* Category Nav Bar */
.nav-category { background: var(--color-primary-dark); border-top: 1px solid rgba(255,255,255,0.08); }
.nav-category-inner { display: flex; align-items: center; justify-content: center; gap: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.nav-category-inner::-webkit-scrollbar { display: none; }
.nav-category-inner a { display: inline-flex; align-items: center; padding: 12px 18px; color: var(--color-secondary-light); font-size: 0.9rem; font-weight: 600; white-space: nowrap; transition: all var(--transition-fast); border-bottom: 3px solid transparent; text-transform: uppercase; letter-spacing: 0.3px; }
.nav-category-inner a:hover, .nav-category-inner a.active { color: var(--color-text-white); background: rgba(255,255,255,0.05); border-bottom-color: var(--color-secondary); }

/* Mobile Menu */
.mobile-menu-toggle { display: none; background: none; border: none; color: var(--color-text-white); font-size: 1.5rem; cursor: pointer; padding: 8px; }
.mobile-nav-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 2000; }
.mobile-nav-overlay.open { display: block; }
.mobile-nav-panel { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--color-bg-dark); z-index: 2001; transition: left var(--transition-normal); overflow-y: auto; padding: var(--spacing-md); }
.mobile-nav-panel.open { left: 0; }
.mobile-nav-close { background: none; border: none; color: var(--color-text-white); font-size: 1.5rem; cursor: pointer; position: absolute; top: 15px; right: 15px; }
.mobile-nav-panel .mobile-nav-links { margin-top: var(--spacing-lg); }
.mobile-nav-panel .mobile-nav-links a { display: block; padding: 12px 0; color: var(--color-secondary-light); font-size: 1rem; font-weight: 600; border-bottom: 1px solid rgba(255,255,255,0.08); }
.mobile-nav-panel .mobile-nav-links a:hover { color: var(--color-text-white); }
.mobile-nav-panel .mobile-btn-group { display: flex; gap: 10px; margin-top: var(--spacing-md); }
.mobile-nav-panel .mobile-btn-group .btn { flex: 1; text-align: center; font-size: 0.85rem; padding: 10px 12px; }

/* ============================================
   BANNER
   ============================================ */
.hero-banner { width: 100%; overflow: hidden; line-height: 0; }
.hero-banner img, .hero-banner svg { width: 100%; height: auto; display: block; }

/* ============================================
   SECTIONS
   ============================================ */
.section { padding: var(--spacing-xl) 0; }
.section-alt { background: var(--color-bg-section); }
.section-dark { background: var(--color-bg-dark); color: var(--color-text-white); }
.section-dark h2, .section-dark h3 { color: var(--color-text-white); }
.section-title { text-align: center; margin-bottom: var(--spacing-lg); }
.section-title h2 { position: relative; display: inline-block; padding-bottom: 12px; }
.section-title h2::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--color-secondary); border-radius: 2px; }
.section-title p { color: var(--color-text-secondary); margin-top: var(--spacing-xs); max-width: 700px; margin-left: auto; margin-right: auto; }

/* ============================================
   SHORTCUT CARDS (Category Entry)
   ============================================ */
.shortcut-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--spacing-sm); margin-top: var(--spacing-md); }
.shortcut-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--spacing-md); text-align: center; transition: all var(--transition-normal); cursor: pointer; text-decoration: none; color: var(--color-text-primary); }
.shortcut-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-secondary); color: var(--color-primary); }
.shortcut-card .sc-icon { width: 56px; height: 56px; margin: 0 auto var(--spacing-xs); background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary)); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.shortcut-card .sc-icon svg { width: 28px; height: 28px; fill: none; stroke: var(--color-text-white); stroke-width: 2; }
.shortcut-card .sc-title { font-size: 0.95rem; font-weight: 700; }

/* ============================================
   CONTENT CARDS
   ============================================ */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md); }
.content-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-normal); }
.content-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.content-card .card-img { height: 180px; background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.content-card .card-img svg { width: 60px; height: 60px; opacity: 0.3; }
.content-card .card-body { padding: var(--spacing-md); }
.content-card .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.content-card .card-body p { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: var(--spacing-sm); }
.card-link { display: inline-flex; align-items: center; gap: 6px; color: var(--color-secondary); font-weight: 600; font-size: 0.9rem; }
.card-link:hover { color: var(--color-primary); }

/* ============================================
   LONG-FORM CONTENT AREA
   ============================================ */
.content-area { max-width: 900px; margin: 0 auto; padding: var(--spacing-lg) var(--spacing-sm); }
.content-area h1 { font-size: 2rem; color: var(--color-primary-dark); border-bottom: 3px solid var(--color-secondary); padding-bottom: var(--spacing-xs); }
.content-area h2 { color: var(--color-primary-dark); border-left: 4px solid var(--color-secondary); padding-left: var(--spacing-sm); margin-top: var(--spacing-xl); }
.content-area h3 { color: var(--color-primary); }
.content-area ul, .content-area ol { padding-left: var(--spacing-md); margin-bottom: var(--spacing-sm); }
.content-area ul li, .content-area ol li { margin-bottom: 8px; position: relative; padding-left: 12px; }
.content-area ul li::before { content: ''; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; background: var(--color-secondary); border-radius: 50%; }
.content-area ol { list-style: decimal; }
.content-area ol li::before { display: none; }
.content-area a { color: var(--color-primary-light); font-weight: 600; border-bottom: 1px solid transparent; }
.content-area a:hover { border-bottom-color: var(--color-primary-light); }
.content-area blockquote { border-left: 4px solid var(--color-secondary); background: var(--color-bg-section); padding: var(--spacing-sm) var(--spacing-md); margin: var(--spacing-md) 0; border-radius: 0 var(--radius-md) var(--radius-md) 0; font-style: italic; }
.content-area .highlight-box { background: linear-gradient(135deg, rgba(26,82,118,0.05), rgba(212,160,23,0.05)); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--spacing-md); margin: var(--spacing-md) 0; }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: var(--spacing-xs); overflow: hidden; background: var(--color-bg-card); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: var(--spacing-sm) var(--spacing-md); cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--color-text-primary); background: none; border: none; width: 100%; text-align: left; font-family: var(--font-stack); transition: background var(--transition-fast); }
.faq-question:hover { background: var(--color-bg-section); }
.faq-question .faq-toggle { font-size: 1.3rem; color: var(--color-secondary); transition: transform var(--transition-fast); flex-shrink: 0; margin-left: 12px; }
.faq-item.open .faq-question .faq-toggle { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-item.open .faq-answer { max-height: 600px; }
.faq-answer-inner { padding: 0 var(--spacing-md) var(--spacing-sm); color: var(--color-text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* ============================================
   CTA SECTIONS
   ============================================ */
.cta-section { background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)); text-align: center; padding: var(--spacing-xl) var(--spacing-sm); border-radius: var(--radius-xl); margin: var(--spacing-lg) 0; color: var(--color-text-white); }
.cta-section h2 { color: var(--color-text-white); margin-bottom: var(--spacing-sm); }
.cta-section p { color: var(--color-text-light); margin-bottom: var(--spacing-md); max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-section .btn { font-size: 1rem; padding: 14px 36px; }
.cta-inline { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ============================================
   NEWS / ARTICLE LIST
   ============================================ */
.news-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: var(--spacing-md); }
.news-item { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-normal); }
.news-item:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.news-item .news-thumb { height: 180px; background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); display: flex; align-items: center; justify-content: center; }
.news-item .news-body { padding: var(--spacing-md); overflow: hidden; }
.news-item .news-meta { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 8px; }
.news-item .news-body h3 { font-size: 1.1rem; margin-bottom: 8px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; word-break: break-word; overflow-wrap: break-word; }
.news-item .news-body h3 a { color: var(--color-text-primary); }
.news-item .news-body h3 a:hover { color: var(--color-primary-light); }
.news-item .news-excerpt { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: var(--spacing-sm); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; word-break: break-word; overflow-wrap: break-word; }

/* Article Detail */
.article-header { margin-bottom: var(--spacing-lg); }
.article-header .article-meta { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: var(--spacing-sm); }
.related-articles { margin-top: var(--spacing-xl); padding-top: var(--spacing-lg); border-top: 2px solid var(--color-border); }
.related-articles h3 { margin-bottom: var(--spacing-md); }
.related-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--spacing-sm); }
.related-list a { display: block; padding: var(--spacing-sm); background: var(--color-bg-section); border-radius: var(--radius-md); font-weight: 600; color: var(--color-text-primary); transition: all var(--transition-fast); }
.related-list a:hover { background: var(--color-primary); color: var(--color-text-white); }

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb { padding: var(--spacing-sm) 0; font-size: 0.85rem; color: var(--color-text-muted); }
.breadcrumb a { color: var(--color-primary-light); }
.breadcrumb span { margin: 0 6px; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer { background: var(--color-bg-footer); color: var(--color-text-light); }
.footer-top { padding: var(--spacing-xl) 0 var(--spacing-lg); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: var(--spacing-lg); }
.footer-col h4 { color: var(--color-secondary-light); font-size: 1rem; margin-bottom: var(--spacing-sm); padding-bottom: 8px; border-bottom: 2px solid rgba(212,160,23,0.3); }
.footer-col p { font-size: 0.9rem; line-height: 1.7; color: var(--color-text-light); margin-bottom: 8px; }
.footer-col ul li { margin-bottom: 6px; }
.footer-col ul li a { color: var(--color-text-light); font-size: 0.9rem; transition: color var(--transition-fast); }
.footer-col ul li a:hover { color: var(--color-secondary); }
.footer-col .contact-item { display: flex; gap: 8px; margin-bottom: 10px; font-size: 0.9rem; }
.footer-col .contact-label { color: var(--color-secondary-light); font-weight: 600; white-space: nowrap; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: var(--spacing-sm) 0; text-align: center; font-size: 0.8rem; color: var(--color-text-muted); }
.footer-bottom a { color: var(--color-text-muted); }
.footer-bottom a:hover { color: var(--color-secondary); }

/* ============================================
   PAGE HERO (Inner pages)
   ============================================ */
.page-hero { background: linear-gradient(135deg, var(--color-bg-dark), var(--color-primary-dark)); padding: var(--spacing-xl) 0 var(--spacing-lg); text-align: center; color: var(--color-text-white); }
.page-hero h1 { color: var(--color-text-white); font-size: 2rem; margin-bottom: 8px; }
.page-hero p { color: var(--color-text-light); max-width: 700px; margin: 0 auto; }
.page-hero-alt { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light)); }
.page-hero-accent { background: linear-gradient(135deg, #1a3a4a, var(--color-primary-dark)); }

/* Steps */
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--spacing-md); margin-top: var(--spacing-md); counter-reset: step-counter; }
.step-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--spacing-md); text-align: center; position: relative; counter-increment: step-counter; }
.step-card::before { content: counter(step-counter); position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--color-secondary); color: var(--color-bg-dark); width: 28px; height: 28px; border-radius: 50%; font-size: 0.85rem; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.step-card h4 { font-size: 1rem; margin-bottom: 6px; margin-top: 6px; }
.step-card p { font-size: 0.88rem; color: var(--color-text-secondary); }

/* Feature Grid */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-md); }
.feature-item { padding: var(--spacing-md); border-radius: var(--radius-lg); background: var(--color-bg-card); border: 1px solid var(--color-border); }
.feature-item h4 { font-size: 1rem; margin-bottom: 6px; color: var(--color-primary); }
.feature-item p { font-size: 0.9rem; color: var(--color-text-secondary); }

/* Bonus table */
.bonus-table { width: 100%; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.bonus-table th { background: var(--color-primary-dark); }
.bonus-table td { font-size: 0.9rem; }

/* ============================================
   404 Page
   ============================================ */
.page-404 { text-align: center; padding: var(--spacing-xxl) var(--spacing-sm); min-height: 60vh; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.page-404 .error-code { font-size: 6rem; font-weight: 900; color: var(--color-primary); line-height: 1; }
.page-404 h1 { font-size: 1.5rem; margin: var(--spacing-sm) 0; }
.page-404 p { color: var(--color-text-secondary); margin-bottom: var(--spacing-md); }
.page-404 .links-404 { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.page-404 .links-404 a { padding: 10px 20px; background: var(--color-primary); color: var(--color-text-white); border-radius: var(--radius-md); font-weight: 600; font-size: 0.9rem; transition: all var(--transition-fast); }
.page-404 .links-404 a:hover { background: var(--color-primary-dark); color: var(--color-text-white); }

/* Back to top */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; background: var(--color-primary); color: var(--color-text-white); border: none; border-radius: 50%; cursor: pointer; font-size: 1.2rem; display: none; align-items: center; justify-content: center; box-shadow: var(--shadow-md); z-index: 900; transition: all var(--transition-fast); }
.back-to-top.visible { display: flex; }
.back-to-top:hover { background: var(--color-secondary); transform: translateY(-2px); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 992px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.4rem; }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .header-logo svg, .header-logo img { max-height: 40px; }
  .mobile-menu-toggle { display: block; }
  .nav-category { display: none; }
  .nav-category.mobile-show { display: block; }
  .nav-category-inner { justify-content: flex-start; }
  .header-nav-desktop { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: var(--spacing-lg) 0; }
  .content-area { padding: var(--spacing-md) var(--spacing-sm); }
  .shortcut-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .news-list { grid-template-columns: 1fr; }
  .cta-section { border-radius: var(--radius-md); margin: var(--spacing-md) var(--spacing-xs); }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.3rem; }
  .page-hero { padding: var(--spacing-lg) 0 var(--spacing-md); }
}

@media (max-width: 480px) {
  .shortcut-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .shortcut-card { padding: var(--spacing-sm); }
  .steps-grid { grid-template-columns: 1fr; }
  .header-actions .btn { padding: 7px 14px; font-size: 0.8rem; }
  .feature-grid { grid-template-columns: 1fr; }
}