: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;--red: #ef4444}
*{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: 1.7}
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,
  .navbar-nav .nav-link.active{color: var(--accent) !important}
.navbar-toggler{border-color: var(--border)}
.navbar-toggler-icon{filter: invert(1)}
.btn-nav-register{background: var(--accent);color: #fff !important;border-radius: 6px;padding: 6px 18px !important;font-weight: 600}
.btn-nav-register: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%, #1a2332 60%, #0d1117 100%);padding: 64px 0 48px;position: relative;overflow: hidden}
.page-hero::before{content: "";position: absolute;top: -10%;right: -5%;width: 480px;height: 480px;background: radial-gradient(circle, rgba(139,92,246,0.07) 0%, transparent 70%);pointer-events: none}
.page-hero::after{content: "";position: absolute;bottom: -10%;left: -5%;width: 360px;height: 360px;background: radial-gradient(circle, rgba(59,130,246,0.06) 0%, transparent 70%);pointer-events: none}
.hero-badge{display: inline-block;background: var(--accent-light);color: var(--accent);border: 1px solid rgba(59,130,246,0.3);border-radius: 20px;padding: 4px 16px;font-size: 13px;margin-bottom: 16px}
.page-hero h1{font-size: clamp(24px, 4vw, 40px);font-weight: 700;line-height: 1.3;margin-bottom: 18px}
.page-hero h1 .brand{color: var(--accent)}
.page-hero p{color: var(--text-secondary);font-size: 16px;max-width: 560px;margin-bottom: 28px}
.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}
section{padding: 60px 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(22px, 3.5vw, 34px);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 44px}
.bingo-grid{display: grid;grid-template-columns: repeat(5, 1fr);gap: 6px;max-width: 320px;margin: 0 auto}
.bingo-header-cell{background: var(--accent);color: #fff;font-weight: 700;font-size: 18px;text-align: center;padding: 12px 6px;border-radius: 6px}
.bingo-cell{background: var(--bg-card);border: 1px solid var(--border);color: var(--text-primary);font-size: 15px;font-weight: 500;text-align: center;padding: 12px 6px;border-radius: 6px;transition: all 0.2s;cursor: default}
.bingo-cell.marked{background: var(--accent-light);border-color: var(--accent);color: var(--accent);font-weight: 700}
.bingo-cell.free{background: linear-gradient(135deg, var(--accent), #60a5fa);color: #fff;font-size: 11px;font-weight: 700;border: none}
.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)}
.feature-icon{width: 52px;height: 52px;border-radius: 12px;display: flex;align-items: center;justify-content: center;font-size: 22px;margin-bottom: 16px}
.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}
.stat-card{background: var(--bg-card);border: 1px solid var(--border);border-radius: 12px;padding: 24px 20px;text-align: center;transition: border-color 0.2s}
.stat-card:hover{border-color: var(--accent)}
.stat-card .icon{width: 48px;height: 48px;border-radius: 10px;display: flex;align-items: center;justify-content: center;margin: 0 auto 14px;font-size: 20px}
.stat-card .num{font-size: 30px;font-weight: 700;color: var(--text-primary)}
.stat-card .label{font-size: 13px;color: var(--text-secondary);margin-top: 4px}
.content-section{background: var(--bg-secondary)}
.content-body h3{font-size: 20px;font-weight: 600;color: var(--accent);margin: 28px 0 12px}
.content-body p{color: var(--text-secondary);font-size: 15px;margin-bottom: 14px}
.content-body ul{color: var(--text-secondary);font-size: 15px;padding-left: 20px;margin-bottom: 14px}
.content-body ul li{margin-bottom: 6px}
.step-item{display: flex;gap: 20px;margin-bottom: 28px;align-items: flex-start}
.step-num{width: 44px;height: 44px;border-radius: 50%;background: var(--accent);color: #fff;font-size: 18px;font-weight: 700;display: flex;align-items: center;justify-content: center;flex-shrink: 0}
.step-content h5{font-size: 16px;font-weight: 600;color: var(--text-primary);margin-bottom: 6px}
.step-content p{font-size: 14px;color: var(--text-secondary);margin: 0}
.prize-table{width: 100%;border-collapse: collapse}
.prize-table th{background: var(--bg-card);color: var(--accent);font-size: 13px;font-weight: 600;padding: 12px 16px;text-align: left;border-bottom: 1px solid var(--border)}
.prize-table td{padding: 12px 16px;font-size: 14px;color: var(--text-secondary);border-bottom: 1px solid var(--border)}
.prize-table tr:last-child td{border-bottom: none}
.prize-table tr:hover td{background: rgba(59,130,246,0.04);color: var(--text-primary)}
.badge-gold{background: rgba(245,158,11,0.15);color: var(--yellow);border-radius: 4px;padding: 2px 10px;font-size: 12px;font-weight: 600}
.badge-silver{background: rgba(156,163,175,0.15);color: #d1d5db;border-radius: 4px;padding: 2px 10px;font-size: 12px;font-weight: 600}
.badge-bronze{background: rgba(180,83,9,0.15);color: #fb923c;border-radius: 4px;padding: 2px 10px;font-size: 12px;font-weight: 600}
.badge-blue{background: var(--accent-light);color: var(--accent);border-radius: 4px;padding: 2px 10px;font-size: 12px;font-weight: 600}
.tip-card{background: var(--bg-card);border: 1px solid var(--border);border-left: 4px solid var(--accent);border-radius: 10px;padding: 18px 20px;margin-bottom: 14px}
.tip-card h6{color: var(--text-primary);font-weight: 600;margin-bottom: 6px;font-size: 15px}
.tip-card p{color: var(--text-secondary);font-size: 14px;margin: 0}
.accordion-item{background: var(--bg-card) !important;border: 1px solid var(--border) !important;margin-bottom: 8px;border-radius: 10px !important;overflow: hidden}
.accordion-button{background: var(--bg-card) !important;color: var(--text-primary) !important;font-size: 15px;font-weight: 500;box-shadow: none !important}
.accordion-button:not(.collapsed){color: var(--accent) !important}
.accordion-button::after{filter: invert(1) brightness(0.7)}
.accordion-body{background: var(--bg-card);color: var(--text-secondary);font-size: 14px;padding-top: 0}
.img-showcase{border-radius: 14px;width: 100%;object-fit: cover;box-shadow: 0 8px 32px rgba(0,0,0,0.4);display: block}
.img-caption{font-size: 13px;color: var(--text-secondary);text-align: center;margin-top: 8px}
.progress-label{display: flex;justify-content: space-between;margin-bottom: 6px}
.progress-label span{font-size: 13px;color: var(--text-secondary)}
.progress-label strong{font-size: 13px;color: var(--text-primary)}
.progress{background: var(--border);border-radius: 4px;height: 8px;margin-bottom: 14px}
.bar-blue{background: linear-gradient(90deg, var(--accent), #60a5fa);border-radius: 4px;height: 8px}
.bar-green{background: linear-gradient(90deg, var(--green), #34d399);border-radius: 4px;height: 8px}
.bar-yellow{background: linear-gradient(90deg, var(--yellow), #fbbf24);border-radius: 4px;height: 8px}
.bar-purple{background: linear-gradient(90deg, var(--purple), #a78bfa);border-radius: 4px;height: 8px}
footer{background: #0d1117;border-top: 1px solid var(--border);padding: 48px 0 24px}
.footer-logo img{height: 36px;margin-bottom: 12px}
.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: 8px}
.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: 40px;padding-top: 20px}
.footer-bottom p{font-size: 13px;color: var(--text-secondary);margin: 0}
@media  (max-width: 768px) {.page-hero{padding: 44px 0 36px}
section{padding: 44px 0}
.bingo-grid{max-width: 260px}
.bingo-header-cell, .bingo-cell{font-size: 13px;padding: 9px 4px}}