body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0;
}

#browser {
    width: 80%;
    height: 80%;
    border: 1px solid #ccc;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    background-color: #fff;
    display: flex;
    flex-direction: column;
}

#address-bar {
    display: flex;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

#url-input {
    flex: 1;
    padding: 5px;
    font-size: 16px;
}

button {
    padding: 5px 10px;
    font-size: 16px;
}

#file-input {
    margin: 10px;
}

iframe {
    flex: 1;
    border: none;
}