html,
body {
    height: 100%;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 80%;
    gap: 20px;
}

.canva {
    width: 60%;
    height: 80%;
    background-color: #000;
    border: 2px solid #fff;
    border-radius: 10px;
}

.btn-container {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.btn:hover {
    background-color: #0056b3;
}

.btn:active {
    background-color: #004085;
}