/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #0f0c29;
    background-image: linear-gradient(315deg, #0f0c29 0%, #302b63 74%, #24243e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    padding: 20px;
}

/* Background Animation Effect */
.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(255, 0, 150, 0.15), transparent 60%);
    z-index: -1;
    pointer-events: none;
}

/* Container & Card */
.container {
    width: 100%;
    max-width: 480px; /* Mobile focused width */
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 40px 24px;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

/* Badge New */
.badge-new {
    position: absolute;
    top: 20px;
    right: -35px;
    background: #ff4757;
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 800;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

/* Image App Icon */
.app-icon img {
    width: 120px;
    height: 120px;
    border-radius: 22px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    margin-bottom: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s ease;
}

.app-icon img:hover {
    transform: scale(1.05);
}

/* Typography */
.main-title {
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.highlight {
    color: #00d2ff;
    background: -webkit-linear-gradient(#00d2ff, #3a7bd5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-info {
    display: flex;
    justify-content: center;
    gap: 10px;
    font-size: 0.85rem;
    color: #d1d1d1;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.app-info span {
    background: rgba(255,255,255,0.1);
    padding: 4px 10px;
    border-radius: 20px;
}

.description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #e0e0e0;
    margin-bottom: 30px;
}

/* CTA Button Styles (Quan trọng nhất) */
.cta-container {
    margin: 30px 0;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(90deg, #11998e 0%, #38ef7d 100%);
    color: white;
    text-decoration: none;
    padding: 15px 20px;
    border-radius: 50px;
    box-shadow: 0 10px 25px rgba(56, 239, 125, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(56, 239, 125, 0.6);
}

.download-btn::after { /* Hiệu ứng bóng lóa */
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shine 2s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

.btn-icon {
    font-size: 2rem;
    margin-right: 15px;
}

.btn-text {
    text-align: left;
}

.btn-title {
    display: block;
    font-size: 1.2rem;
    font-weight: 800;
    text-transform: uppercase;
}

.btn-subtitle {
    display: block;
    font-size: 0.8rem;
    opacity: 0.9;
}

/* Features List & SEO Text */
.features {
    text-align: left;
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 16px;
    margin-top: 20px;
}

.features h2 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: #ff9a9e;
}

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

.features li {
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: #f1f1f1;
}

.seo-text {
    font-size: 0.8rem;
    color: #aaa;
    margin-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 10px;
}

/* Footer */
footer {
    margin-top: 30px;
    font-size: 0.8rem;
    color: #777;
}

/* Mobile Responsive */
@media (max-width: 400px) {
    .main-title { font-size: 1.5rem; }
    .download-btn { padding: 12px 15px; }
    .btn-title { font-size: 1rem; }
}