:root {
    --primary-color: #00d2ff;
    --secondary-color: #3a7bd5;
    --accent-color: #ff4b1f;
    --accent-hover: #ff9068;
    --text-white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-white);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #0f2027; /* Fallback */
}

/* Hiệu ứng nền động */
.background-animate {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
    text-align: center;
}

header {
    margin-bottom: 20px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Glassmorphism Card Style */
.card.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

.icon-wrapper {
    margin-bottom: 15px;
}

.game-icon {
    width: 100px;
    height: 100px;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.main-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 10px;
    line-height: 1.2;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.info-badges {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.badge {
    background: rgba(255,255,255,0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* NÚT DOWNLOAD CHUYỂN ĐỔI */
.cta-container {
    margin: 30px 0;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(90deg, #ff4b1f, #ff9068);
    color: white;
    text-decoration: none;
    font-size: 20px;
    font-weight: 800;
    padding: 18px 40px;
    border-radius: 50px;
    box-shadow: 0 10px 20px rgba(255, 75, 31, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    width: 100%;
    max-width: 350px;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 30px rgba(255, 75, 31, 0.6);
}

.download-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: 0.5s;
}

.download-btn:hover::after {
    left: 100%;
    transition: 0.5s;
}

.safe-text {
    margin-top: 10px;
    font-size: 12px;
    color: #4ade80;
    font-weight: 600;
}

/* Content SEO Style */
.content-text {
    text-align: left;
    margin-top: 40px;
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255,255,255,0.9);
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
}

.content-text h2 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #fff;
}

.content-text h3 {
    font-size: 16px;
    margin-top: 15px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.features-list {
    list-style: none;
    margin-bottom: 15px;
}

.features-list li {
    margin-bottom: 8px;
}

footer {
    margin-top: 30px;
    font-size: 12px;
    opacity: 0.7;
}

/* Mobile Responsive */
@media (max-width: 480px) {
    .main-title {
        font-size: 24px;
    }
    .card.glass {
        padding: 30px 15px;
    }
    .download-btn {
        font-size: 16px;
        padding: 15px 25px;
    }
}