:root{--bg-primary: #111827;--bg-secondary: #1f2937;--bg-card: #1a2332;--accent: #3b82f6;--accent-hover: #2563eb;--accent-light: rgba(59,130,246,0.1);--text-primary: #f9fafb;--text-secondary: #9ca3af;--border: #374151;--green: #10b981;--yellow: #f59e0b;--purple: #8b5cf6;--orange: #f97316;--red: #ef4444;--cyan: #06b6d4}
*, *::before, *::after{box-sizing: border-box;margin: 0;padding: 0}
body{background-color: var(--bg-primary);color: var(--text-primary);font-family:system-ui,-apple-system,"Segoe UI","Noto Sans Bengali",sans-serif;font-size: 16px;line-height: 1.8}
a{color: var(--accent);text-decoration: none}
a:hover{color: var(--accent-hover)}
.navbar{background-color: #0d1117 !important;border-bottom: 1px solid var(--border);padding: 12px 0}
.navbar-brand img{height: 40px}
.navbar-nav .nav-link{color: var(--text-secondary) !important;font-size: 14px;padding: 6px 12px !important;transition: color 0.2s}
.navbar-nav .nav-link:hover{color: var(--accent) !important}
.navbar-toggler{border-color: var(--border)}
.navbar-toggler-icon{filter: invert(1)}
.btn-nav-reg{background: var(--accent);color: #fff !important;border-radius: 6px;padding: 6px 18px !important;font-weight: 600}
.btn-nav-reg:hover{background: var(--accent-hover);color: #fff !important}
.breadcrumb-wrap{background: var(--bg-secondary);border-bottom: 1px solid var(--border);padding: 12px 0}
.breadcrumb{margin: 0;background: transparent;padding: 0}
.breadcrumb-item a{color: var(--accent);font-size: 14px}
.breadcrumb-item.active{color: var(--text-secondary);font-size: 14px}
.breadcrumb-item + .breadcrumb-item::before{color: var(--text-secondary)}
.page-hero{background: linear-gradient(135deg, #0d1117 0%, #0f1a2e 60%, #0d1117 100%);padding: 64px 0 48px;text-align: center;position: relative;overflow: hidden}
.page-hero::before{content: "";position: absolute;top: -100px;left: 50%;transform: translateX(-50%);width: 500px;height: 500px;background: radial-gradient(circle, rgba(59,130,246,0.07) 0%, transparent 70%);pointer-events: none}
.hero-badge{display: inline-block;background: rgba(59,130,246,0.1);color: var(--accent);border: 1px solid rgba(59,130,246,0.3);border-radius: 20px;padding: 4px 18px;font-size: 13px;margin-bottom: 18px}
.page-hero h1{font-size: clamp(24px, 4vw, 42px);font-weight: 700;color: var(--text-primary);margin-bottom: 16px;line-height: 1.3}
.page-hero p{color: var(--text-secondary);font-size: 15px;max-width: 560px;margin: 0 auto}
.updated-badge{display: inline-flex;align-items: center;gap: 8px;background: rgba(16,185,129,0.1);border: 1px solid rgba(16,185,129,0.25);color: #10b981;border-radius: 8px;padding: 6px 16px;font-size: 13px;margin-top: 20px}
.toc-card{background: var(--bg-card);border: 1px solid var(--border);border-radius: 14px;padding: 28px;position: sticky;top: 80px}
.toc-card h6{font-size: 13px;font-weight: 700;color: var(--accent);text-transform: uppercase;letter-spacing: 1.5px;margin-bottom: 16px}
.toc-list{list-style: none;padding: 0;margin: 0}
.toc-list li{margin-bottom: 8px}
.toc-list a{font-size: 14px;color: var(--text-secondary);display: flex;align-items: center;gap: 8px;padding: 6px 10px;border-radius: 6px;transition: all 0.2s}
.toc-list a:hover{color: var(--accent);background: var(--accent-light)}
.toc-list a .toc-num{font-size: 11px;font-weight: 700;color: var(--accent);background: var(--accent-light);border-radius: 4px;padding: 1px 6px;flex-shrink: 0}
section{padding: 64px 0}
.section-label{color: var(--accent);font-size: 13px;font-weight: 600;letter-spacing: 2px;text-transform: uppercase;margin-bottom: 8px}
.section-title{font-size: clamp(20px, 3vw, 32px);font-weight: 700;color: var(--text-primary);margin-bottom: 14px}
.section-sub{color: var(--text-secondary);font-size: 15px;max-width: 560px;margin: 0 auto 48px}
.feature-card{background: var(--bg-card);border: 1px solid var(--border);border-radius: 14px;padding: 28px 24px;height: 100%;transition: border-color 0.2s, transform 0.2s}
.feature-card:hover{border-color: var(--accent);transform: translateY(-3px)}
.f-icon{width: 52px;height: 52px;border-radius: 12px;display: flex;align-items: center;justify-content: center;font-size: 22px;margin-bottom: 18px}
.feature-card h5{font-size: 17px;font-weight: 600;color: var(--text-primary);margin-bottom: 10px}
.feature-card p{font-size: 14px;color: var(--text-secondary);margin: 0}
.terms-section{background: var(--bg-card);border: 1px solid var(--border);border-radius: 14px;padding: 36px;margin-bottom: 24px;scroll-margin-top: 90px}
.terms-section .t-header{display: flex;align-items: center;gap: 14px;margin-bottom: 20px;padding-bottom: 16px;border-bottom: 1px solid var(--border)}
.t-num{width: 36px;height: 36px;background: var(--accent-light);color: var(--accent);border-radius: 8px;display: flex;align-items: center;justify-content: center;font-size: 14px;font-weight: 700;flex-shrink: 0}
.terms-section h3{font-size: 18px;font-weight: 600;color: var(--text-primary);margin: 0}
.terms-section p{font-size: 15px;color: var(--text-secondary);margin-bottom: 14px}
.terms-section p:last-child{margin-bottom: 0}
.terms-section ul{list-style: none;padding: 0;margin-bottom: 14px}
.terms-section ul li{font-size: 15px;color: var(--text-secondary);padding: 6px 0 6px 22px;position: relative;border-bottom: 1px solid rgba(55,65,81,0.4)}
.terms-section ul li:last-child{border-bottom: none}
.terms-section ul li::before{content: "";position: absolute;left: 0;top: 14px;width: 8px;height: 8px;border-radius: 50%;background: var(--accent);opacity: 0.6}
.terms-section strong{color: var(--text-primary)}
.alert-info-custom{background: rgba(59,130,246,0.07);border: 1px solid rgba(59,130,246,0.2);border-radius: 10px;padding: 16px 20px;display: flex;gap: 12px;align-items: flex-start;margin-bottom: 16px}
.alert-warn-custom{background: rgba(245,158,11,0.07);border: 1px solid rgba(245,158,11,0.2);border-radius: 10px;padding: 16px 20px;display: flex;gap: 12px;align-items: flex-start;margin-bottom: 16px}
.alert-danger-custom{background: rgba(239,68,68,0.07);border: 1px solid rgba(239,68,68,0.2);border-radius: 10px;padding: 16px 20px;display: flex;gap: 12px;align-items: flex-start;margin-bottom: 16px}
.alert-success-custom{background: rgba(16,185,129,0.07);border: 1px solid rgba(16,185,129,0.2);border-radius: 10px;padding: 16px 20px;display: flex;gap: 12px;align-items: flex-start;margin-bottom: 16px}
.al-icon{font-size: 18px;flex-shrink: 0;margin-top: 2px}
.alert-info-custom .al-icon{color: var(--accent)}
.alert-warn-custom .al-icon{color: var(--yellow)}
.alert-danger-custom .al-icon{color: var(--red)}
.alert-success-custom .al-icon{color: var(--green)}
.alert-info-custom p,
  .alert-warn-custom p,
  .alert-danger-custom p,
  .alert-success-custom p{font-size: 14px;color: var(--text-secondary);margin: 0}
.cta-section{background: linear-gradient(135deg, #0d1117 0%, #0f1a2e 50%, #0d1117 100%);padding: 72px 0;text-align: center}
.cta-section h2{font-size: clamp(22px, 3.5vw, 36px);font-weight: 700;margin-bottom: 16px}
.cta-section p{color: var(--text-secondary);font-size: 16px;max-width: 520px;margin: 0 auto 32px}
.btn-primary-custom{background: var(--accent);color: #fff;border: none;border-radius: 8px;padding: 12px 32px;font-size: 15px;font-weight: 600;display: inline-block;transition: background 0.2s, transform 0.1s}
.btn-primary-custom:hover{background: var(--accent-hover);color: #fff;transform: translateY(-1px)}
.btn-outline-custom{background: transparent;color: var(--accent);border: 1px solid var(--accent);border-radius: 8px;padding: 12px 32px;font-size: 15px;font-weight: 600;display: inline-block;transition: all 0.2s}
.btn-outline-custom:hover{background: var(--accent);color: #fff}
footer{background: #0d1117;border-top: 1px solid var(--border);padding: 52px 0 24px}
.footer-logo img{height: 36px;margin-bottom: 14px}
.footer-desc{font-size: 14px;color: var(--text-secondary);max-width: 280px}
.footer-heading{font-size: 13px;font-weight: 600;color: var(--text-primary);text-transform: uppercase;letter-spacing: 1px;margin-bottom: 16px}
.footer-links{list-style: none;padding: 0;margin: 0}
.footer-links li{margin-bottom: 9px}
.footer-links a{font-size: 14px;color: var(--text-secondary);transition: color 0.2s}
.footer-links a:hover{color: var(--accent)}
.footer-bottom{border-top: 1px solid var(--border);margin-top: 44px;padding-top: 22px}
.footer-bottom p{font-size: 13px;color: var(--text-secondary);margin: 0}
@media  (max-width: 991px) {.toc-card{position: static;margin-bottom: 32px}}
@media  (max-width: 768px) {.page-hero{padding: 48px 0 36px}
.terms-section{padding: 24px 18px}
section{padding: 48px 0}}