/* CSS Reset và Compatibility Fixes */
html {
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

/* Apple App Store Style */
.apple-header {
    background: rgb(69,69,69);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 50;
}

/* Custom Buttons */
.donate-btn {
    background: rgba(244, 208, 63, 0.25);
    color: white;
    border: 2px solid #f4d03f;
    border-radius: 15px;
    padding: 0.3rem 1rem;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.donate-btn:hover {
    background: rgba(241, 196, 15, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(244, 208, 63, 0.4);
}

/* Footer Styles */
.app-footer {
    background-color: #f8f9fa;
    color: #6c757d;
    padding: 3rem 0;
    font-size: 0.9rem;
}
.app-footer .footer-title {
    font-weight: 600;
    color: #212529;
    margin-bottom: 1rem;
}
.app-footer .footer-links a {
    display: block;
    color: #6c757d;
    margin-bottom: 0.5rem;
    transition: color 0.2s;
}
.app-footer .footer-links a:hover {
    color: #007bff;
}
.app-footer .footer-bottom {
    border-top: 1px solid #dee2e6;
    padding-top: 1.5rem;
    margin-top: 1.5rem;
}