html, body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    font-family: sans-serif;
    background: #f4f4f4;
}

.container {
    width: 90vw;
    max-width: 80vw;
    margin: 5vh auto;
    background: white;
    padding: 2vh 2vw;
    border-radius: 1vh;
    box-shadow: 0 0 1vh rgba(0, 0, 0, 0.1);
}

button {
    padding: 1.5vh 3vw;
    font-size: 1.2vw;
    border-radius: 0.8vh;
    border: none;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}