body {
    margin:0;
    padding:0;
    font-family: 'Roboto', sans-serif;
    width: 100%;
    height: 100%;

}

#header {
    background-color: black;
    height: 100%;
    width: 100%;
    position: fixed;
    align-items: center;
    display: flex;
    justify-content: space-around;

}
button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background-color: #000000;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: rgb(255,255,255);
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255,255,255,0.001);
}