html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

.background-image {
    width: 100%;
    height: 100%;
    background-image: url("loading.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover; 
    display: none; 
    animation: fadeIn 0.3s ease-in;
}

#continue-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    transition: all 0.3s ease;
}

.btn-disabled {
    background: #ccc;
    color: #666;
    cursor: not-allowed;
}

.btn-enabled {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-enabled:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.show {
    display: block; 
}