body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: black;
    color: white;
}

#medidor {
    width: 200px;
    height: 100px;
    background: #222;
    border-radius: 100px 100px 0 0;
    border: 5px solid white;
    margin: 20px auto;
    position: relative;
}

#aguja {
    width: 5px;
    height: 70px;
    background: red;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform-origin: bottom;
    transform: rotate(-90deg);
    transition: transform 2s ease-in-out;
}

#marcas {
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    font-size: 14px;
    position: absolute;
    top: 10px;
    width: 100%;
    color: white;
}

button {
    background: #ff0000;
    color: white;
    padding: 10px;
    font-size: 18px;
    border: none;
    cursor: pointer;
    margin-top: 20px;
}

#overlay {
    display: none;
    background: rgba(0, 0, 0, 0.8);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 20px;
    padding-top: 50px;
}