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

body {
    font-family: 'Poppins', sans-serif;
    background-color: #0f1115; /* Dark background */
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    position: relative;
}

/* Background Abstract Anime Style */
.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 107, 0, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 200, 255, 0.1) 0%, transparent 40%);
    z-index: -1;
}

/* Main Container */
.container {
    width: 100%;
    max-width: 600px; /* Mobile focused width */
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Glassmorphism Cards */
.hero-card, .content-card {
    background: rgba(26, 29, 36, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Hero Section Styles */
.badge {
    display: inline-block;
    background: rgba(255, 107, 0, 0.2);
    color: #ff6b00;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
    border: 1px solid rgba(255, 107, 0, 0.3);
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #ffffff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.1rem;
    color: #a0a0a0;
    margin-bottom: 20px;
}

.app-info {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: #cccccc;
    font-weight: 500;
}

.app-info span {
    background: rgba(255, 255, 255, 0.05);
    padding: 5px 10px;
    border-radius: 8px;
}

/* CTA Button Styles (Quan trọng nhất) */
.cta-container {
    margin: 10px 0;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #ff6b00 0%, #ff4500 100%);
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(255, 69, 0, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: pulse 2s infinite;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(255, 69, 0, 0.6);
}

.download-btn .icon {
    margin-right: 10px;
    font-size: 1.4rem;
}

.shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-20deg);
    animation: shine 3s infinite;
}

.safe-text {
    font-size: 0.8rem;
    color: #4cd964;
    margin-top: 12px;
    opacity: 0.9;
}

/* Content Styles */
.content-card {
    text-align: left;
}

h2 {
    color: #ff6b00;
    font-size: 1.5rem;
    margin-bottom: 15px;
    border-bottom: 2px solid rgba(255, 107, 0, 0.2);
    padding-bottom: 10px;
}

h3 {
    color: #ffffff;
    font-size: 1.2rem;
    margin-top: 25px;
    margin-bottom: 10px;
}

p {
    color: #cccccc;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

strong {
    color: #ffffff;
}

.features-list {
    list-style: none;
    margin: 15px 0;
}

.features-list li {
    margin-bottom: 10px;
    padding-left: 0;
    color: #e0e0e0;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0 40px;
    color: #666;
    font-size: 0.8rem;
}

.footer-link {
    color: #ff6b00;
    text-decoration: none;
    font-weight: 600;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}

/* Mobile Responsive Adjustments */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    .hero-card { padding: 25px 15px; }
    .download-btn { font-size: 1.1rem; padding: 16px; }
}