body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    height: 100vh;
    overflow: auto;
}

.container {
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 400px;
    margin: 20px 0;
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.country-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.country-list li {
    padding: 10px;
    margin: 5px 0;
    background-color: #e0e0e0;
    border-radius: 4px;
    font-size: 16px;
    color: #333;
}

.hidden {
    display: none;
}

.loading {
    font-size: 18px;
    color: #666;
}

.error {
    color: red;
    font-size: 18px;
}