* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: 'Arial', sans-serif;
}

#app {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.content {
    font-size: 2rem;
    font-weight: bold;
    color: #333;
}