:root {
            --chinh-vang-kim: #D4AF37;
            --phu-vang-dong: #856404;
            --nhan-manh-vang-sang: #FFD700;
            --gradient-hoang-gia: linear-gradient(135deg, #D4AF37 0%, #FFD700 50%, #B8860B 100%);
            --nen-chinh: #0A0A0A;
            --nen-phu: #121212;
            --nen-the-bai: #1E1E1E;
            --nen-noi-bat: #262626;
            --chu-chinh: #FFFFFF;
            --chu-phu: #B3B3B3;
            --chu-vang-nhan-manh: #FFD700;
            --vien-mac-dinh: #333333;
            --vien-vang-kim: #D4AF37;
            --thanh-cong: #00C853;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            background-color: var(--nen-chinh);
            color: var(--chu-chinh);
            font-family: 'Inter', sans-serif;
            font-size: 14px;
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
        }
        h1, h2, h3 { font-family: 'Montserrat', sans-serif; font-weight: 700; }
        header {
            background-color: var(--nen-phu);
            padding: 10px 15px;
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--vien-mac-dinh);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        header .logo-box { display: flex; align-items: center; gap: 8px; }
        header .logo-box img { width: 25px; height: 25px; object-fit: contain; }
        header .logo-box strong { font-size: 16px; font-weight: 400; color: var(--chu-chinh); }
        header .auth-btns { display: flex; gap: 10px; }
        header button {
            padding: 6px 15px;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            font-family: 'Montserrat', sans-serif;
        }
        header .btn-login { background: transparent; color: var(--chu-chinh); border: 1px solid var(--chu-chinh); }
        header .btn-register { background: var(--gradient-hoang-gia); color: var(--nen-chinh); }
        main { max-width: 600px; margin: 0 auto; padding-bottom: 80px; }
        .banner { width: 100%; aspect-ratio: 2 / 1; cursor: pointer; }
        .banner img { width: 100%; height: 100%; object-fit: cover; }
        .jackpot-container {
            background: var(--nen-the-bai);
            margin: 15px;
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--vien-mo);
            box-shadow: 0 4px 15px rgba(0,0,0,0.5);
        }
        .jackpot-title { color: var(--chu-vang-nhan-manh); font-weight: 800; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 10px; }
        .jackpot-amount { font-family: 'Roboto Mono', monospace; font-size: 32px; color: var(--nhan-manh-vang-sang); font-weight: 700; text-shadow: 0 0 10px rgba(255,215,0,0.5); }
        .intro-card { padding: 20px; margin: 15px; background: var(--nen-phu); border-radius: 12px; border-left: 4px solid var(--chinh-vang-kim); }
        .intro-card h1 { font-size: 20px; color: var(--chu-vang-nhan-manh); margin-bottom: 10px; }
        .intro-card p { color: var(--chu-phu); font-size: 14px; text-align: justify; }
        .game-section { padding: 0 15px; margin-bottom: 25px; }
        .section-title { font-size: 18px; margin-bottom: 15px; padding-left: 10px; border-left: 3px solid var(--chinh-vang-kim); }
        .game-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
        .game-card { background: var(--nen-the-bai); border-radius: 8px; overflow: hidden; text-decoration: none; border: 1px solid var(--vien-mac-dinh); transition: transform 0.2s; }
        .game-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; display: block; }
        .game-card h3 { padding: 10px; font-size: 13px; color: var(--chu-chinh); text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .payment-license { background: var(--nen-phu); padding: 20px 15px; margin: 20px 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; text-align: center; }
        .payment-item i { font-size: 24px; color: var(--chu-vang-nhan-manh); margin-bottom: 5px; }
        .payment-item span { display: block; font-size: 10px; color: var(--chu-phu); }
        .guide-section { padding: 15px; }
        .guide-card { background: var(--nen-the-bai); padding: 15px; border-radius: 8px; margin-bottom: 15px; }
        .guide-card h3 { color: var(--chu-vang-nhan-manh); margin-bottom: 8px; font-size: 16px; }
        .guide-card p { color: var(--chu-phu); font-size: 13px; }
        .lottery-marquee { background: var(--nen-noi-bat); padding: 15px; margin: 20px 15px; border-radius: 8px; overflow: hidden; height: 150px; position: relative; }
        .marquee-content { animation: scrollUp 20s linear infinite; }
        @keyframes scrollUp { 0% { transform: translateY(0); } 100% { transform: translateY(-50%); } }
        .lottery-item { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid var(--vien-mac-dinh); font-size: 12px; }
        .lottery-item .user { color: var(--chu-vang-nhan-manh); }
        .lottery-item .win { color: var(--thanh-cong); font-weight: 600; }
        .provider-wall { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 15px; }
        .provider-item { background: var(--nen-noi-bat); padding: 12px; text-align: center; border-radius: 6px; font-weight: 600; border: 1px solid var(--vien-mo); color: var(--chu-chinh); }
        .comment-section { padding: 15px; }
        .comment-card { background: var(--nen-the-bai); padding: 15px; border-radius: 12px; margin-bottom: 15px; border: 1px solid var(--vien-mac-dinh); }
        .comment-header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
        .comment-header i { font-size: 30px; color: var(--chu-phu); }
        .comment-name { font-weight: 600; font-size: 14px; }
        .stars { color: var(--nhan-manh-vang-sang); font-size: 12px; }
        .comment-text { font-size: 13px; color: var(--chu-phu); margin-bottom: 8px; font-style: italic; }
        .comment-date { font-size: 11px; color: var(--chu-vo_hieu_hoa); }
        .faq-section { padding: 15px; }
        .faq-item { background: var(--nen-phu); border-radius: 8px; margin-bottom: 10px; overflow: hidden; }
        .faq-question { padding: 15px; font-weight: 600; color: var(--chu-vang-nhan-manh); border-bottom: 1px solid var(--vien-mac-dinh); display: flex; justify-content: space-between; }
        .faq-answer { padding: 15px; color: var(--chu-phu); font-size: 13px; line-height: 1.6; }
        .security-section { padding: 20px 15px; text-align: center; background: #000; border-top: 1px solid var(--vien-mac-dinh); }
        .security-badges { display: flex; justify-content: center; gap: 20px; margin-bottom: 15px; font-size: 24px; color: var(--chu-vang-nhan-manh); }
        .security-text { font-size: 12px; color: var(--chu-phu); }
        .navigator {
            position: fixed;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            max-width: 600px;
            background: var(--nen-phu);
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
            border-top: 1px solid var(--vien-mac-dinh);
            z-index: 1000;
        }
        .nav-item { text-decoration: none; text-align: center; color: var(--chu-phu); font-size: 11px; }
        .nav-item i { display: block; font-size: 20px; margin-bottom: 3px; }
        footer {
            background-color: var(--nen-chinh);
            padding: 30px 15px 100px;
            border-top: 1px solid var(--vien-mac-dinh);
            text-align: center;
        }
        footer .contact-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; margin-bottom: 25px; }
        footer .contact-link { color: var(--chu-vang-nhan-manh); text-decoration: none; font-size: 13px; display: flex; align-items: center; gap: 5px; }
        footer .links-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-bottom: 30px; }
        footer .links-grid a { color: var(--chu-phu); text-decoration: none; font-size: 12px; }
        footer .copyright { font-size: 12px; color: var(--chu-vo_hieu_hoa); border-top: 1px solid var(--vien-mac-dinh); padding-top: 20px; }