html {
    background-color: black;
    color: aliceblue;
    
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}


.minuteur {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: auto;
    margin-bottom: auto;
    font-size: 200px;
    font-weight: 500;

}

.content {
    margin: 30px;
}

#start_timer10 {
    background-color: #4D4D4D;
    border: none;
    color: white;
    padding: 10px 15px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 25px;
    cursor: pointer;
    font-family: 'roboto', sans-serif;
    border: 2px #aaa solid;
    border-radius: 5px;
}

#start_timer10:hover {
    background-color: #757575;
}


footer {
    font-size: large;
    color: aliceblue;
    text-align: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    position:relative;
    display: none;
  }