:root {
            --primary: #FFD700;
            --secondary: #C0C0C0;
            --accent: #FF4500;
            --highlight: #FFC107;
            --bg-main: #0F0F0F;
            --bg-surface: #1A1A1A;
            --bg-overlay: rgba(0, 0, 0, 0.85);
            --grad-start: #1C1C1C;
            --grad-end: #000000;
            --success: #28A745;
            --warning: #FFC107;
            --danger: #DC3545;
            --info: #17A2B8;
            --text-primary: #FFFFFF;
            --text-secondary: #B3B3B3;
            --text-muted: #757575;
            --text-inverse: #000000;
            --border-def: #333333;
            --border-strong: #FFD700;
            --border-light: #444444;
            --font-primary: 'Hind Siliguri', sans-serif;
            --font-secondary: 'Noto Sans Bengali', sans-serif;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { 
            background: linear-gradient(to bottom, var(--grad-start), var(--grad-end)); 
            color: var(--text-primary); 
            font-family: var(--font-primary); 
            line-height: 1.5; 
            overflow-x: hidden; 
        }

        header {
            background: var(--bg-surface);
            border-bottom: 2px solid var(--border-strong);
            padding: 10px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header .logo-section { display: flex; align-items: center; gap: 10px; }
        header img { width: 25px; height: 25px; border-radius: 4px; }
        header strong { font-size: 16px; font-weight: normal; color: var(--primary); }

        header .auth-buttons { display: flex; gap: 10px; }
        .btn-auth { 
            padding: 8px 16px; 
            border-radius: 20px; 
            cursor: pointer; 
            font-family: var(--font-primary); 
            font-weight: 600; 
            border: none; 
            transition: 0.3s; 
        }
        .btn-login { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
        .btn-register { background: var(--primary); color: var(--text-inverse); }
        .btn-auth:hover { opacity: 0.8; transform: scale(1.05); }

        main { padding: 0 0 80px 0; max-width: 1200px; margin: 0 auto; }

        .banner-container { width: 100%; aspect-ratio: 2/1; overflow: hidden; cursor: pointer; }
        .banner-container img { width: 100%; height: 100%; object-fit: cover; }

        .reward-section { 
            background: linear-gradient(45deg, var(--accent), var(--highlight)); 
            margin: 20px; 
            padding: 30px; 
            border-radius: 20px; 
            text-align: center; 
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }
        .reward-section h2 { color: var(--text-inverse); margin-bottom: 15px; font-size: 28px; }
        .reward-section p { color: var(--text-inverse); font-size: 18px; margin-bottom: 20px; opacity: 0.9; }
        .btn-reward { 
            background: var(--text-inverse); 
            color: var(--primary); 
            padding: 15px 40px; 
            font-size: 20px; 
            font-weight: bold; 
            border-radius: 30px; 
            border: none; 
            cursor: pointer; 
            box-shadow: 0 4px 15px rgba(0,0,0,0.4);
        }

        .intro-card { 
            background: var(--bg-surface); 
            margin: 20px; 
            padding: 30px; 
            border-radius: 20px; 
            border: 1px solid var(--border-light); 
            text-align: center; 
        }
        .intro-card h1 { color: var(--primary); font-size: 32px; margin-bottom: 15px; }
        .intro-card p { color: var(--text-secondary); font-size: 16px; }

        .section-title { 
            padding: 0 20px; 
            margin: 40px 0 20px; 
            color: var(--primary); 
            font-size: 24px; 
            display: flex; 
            align-items: center; 
            gap: 10px; 
        }
        .section-title::before { content: ""; width: 5px; height: 24px; background: var(--primary); display: inline-block; border-radius: 5px; }

        .game-grid { 
            display: grid; 
            grid-template-columns: repeat(2, 1fr); 
            gap: 15px; 
            padding: 0 20px; 
        }
        .game-card { 
            background: var(--bg-surface); 
            border-radius: 15px; 
            overflow: hidden; 
            text-decoration: none; 
            border: 1px solid var(--border-def); 
            transition: 0.3s; 
        }
        .game-card:hover { border-color: var(--primary); transform: translateY(-5px); }
        .game-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
        .game-card h3 { 
            padding: 12px; 
            font-size: 16px; 
            text-align: center; 
            color: var(--text-primary); 
            background: linear-gradient(transparent, rgba(0,0,0,0.8)); 
        }

        .payment-grid { 
            display: grid; 
            grid-template-columns: repeat(4, 1fr); 
            gap: 10px; 
            padding: 0 20px; 
        }
        .payment-item { 
            background: var(--bg-surface); 
            padding: 15px; 
            border-radius: 12px; 
            text-align: center; 
            border: 1px solid var(--border-def); 
            color: var(--text-secondary); 
            font-size: 13px;
        }
        .payment-item i { display: block; font-size: 24px; color: var(--primary); margin-bottom: 8px; }

        .guidelines { padding: 0 20px; display: grid; gap: 15px; }
        .guide-item { 
            background: var(--bg-surface); 
            padding: 20px; 
            border-radius: 15px; 
            border-left: 4px solid var(--primary); 
        }
        .guide-item h3 { color: var(--primary); margin-bottom: 10px; font-size: 18px; }
        .guide-item p { color: var(--text-secondary); font-size: 14px; }

        .review-grid { padding: 0 20px; display: grid; gap: 15px; }
        .review-card { 
            background: var(--bg-surface); 
            padding: 20px; 
            border-radius: 15px; 
            border: 1px solid var(--border-def); 
        }
        .review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
        .review-header i { font-size: 30px; color: var(--primary); }
        .review-header .user-info { flex: 1; }
        .review-header .username { font-weight: bold; display: block; }
        .review-header .stars { color: var(--highlight); font-size: 12px; }
        .review-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 10px; }
        .review-date { font-size: 12px; color: var(--text-muted); text-align: right; display: block; }

        .lottery-list { padding: 0 20px; display: grid; gap: 10px; }
        .lottery-item { 
            background: var(--bg-surface); 
            padding: 15px; 
            border-radius: 12px; 
            display: flex; 
            justify-content: space-between; 
            align-items: center; 
            border: 1px solid var(--border-def); 
        }
        .lottery-item .user { font-weight: bold; color: var(--text-primary); }
        .lottery-item .game { font-size: 13px; color: var(--text-secondary); }
        .lottery-item .amount { color: var(--primary); font-weight: bold; }
        .lottery-item .time { font-size: 11px; color: var(--text-muted); }

        .provider-grid { 
            display: grid; 
            grid-template-columns: repeat(2, 1fr); 
            gap: 10px; 
            padding: 0 20px; 
        }
        .provider-box { 
            background: linear-gradient(135deg, #222, #333); 
            padding: 20px; 
            text-align: center; 
            border-radius: 10px; 
            font-weight: bold; 
            color: var(--primary); 
            border: 1px solid var(--border-light); 
        }

        .faq-section { padding: 0 20px; display: grid; gap: 15px; }
        .faq-item { background: var(--bg-surface); padding: 20px; border-radius: 15px; border: 1px solid var(--border-def); }
        .faq-item h3 { font-size: 16px; color: var(--primary); margin-bottom: 10px; }
        .faq-item p { font-size: 14px; color: var(--text-secondary); }

        .security-section { 
            margin: 20px; 
            padding: 25px; 
            background: var(--bg-surface); 
            border-radius: 20px; 
            text-align: center; 
            border: 1px dashed var(--primary); 
        }
        .security-section i { font-size: 40px; color: var(--success); margin-bottom: 15px; }
        .security-section p { font-size: 14px; color: var(--text-secondary); margin-bottom: 15px; }
        .security-links a { color: var(--highlight); text-decoration: none; font-size: 13px; margin: 0 5px; }

        .navigator { 
            position: fixed; 
            bottom: 0; 
            left: 0; 
            right: 0; 
            background: var(--bg-surface); 
            display: flex; 
            justify-content: space-around; 
            padding: 12px 0; 
            border-top: 2px solid var(--border-strong); 
            z-index: 2000; 
        }
        .nav-item { 
            text-decoration: none; 
            color: var(--text-secondary); 
            text-align: center; 
            font-size: 12px; 
            display: flex; 
            flex-direction: column; 
            gap: 5px; 
        }
        .nav-item i { font-size: 20px; color: var(--primary); }

        footer { 
            background: var(--bg-surface); 
            padding: 40px 20px; 
            border-top: 1px solid var(--border-def); 
            text-align: center; 
        }
        .footer-contact { margin-bottom: 30px; display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }
        .footer-contact a { color: var(--text-secondary); text-decoration: none; font-size: 14px; }
        .footer-links { 
            display: grid; 
            grid-template-columns: repeat(3, 1fr); 
            gap: 10px; 
            margin-bottom: 30px; 
            text-align: left; 
        }
        .footer-links a { color: var(--text-muted); text-decoration: none; font-size: 13px; display: block; padding: 5px 0; }
        .footer-copy { color: var(--text-muted); font-size: 12px; border-top: 1px solid var(--border-def); padding-top: 20px; }

        @media (min-width: 768px) {
            .game-grid { grid-template-columns: repeat(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(8, 1fr); }
            .provider-grid { grid-template-columns: repeat(4, 1fr); }
            .footer-links { grid-template-columns: repeat(5, 1fr); }
        }