body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #111;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 500px;
    text-align: center;
    background: #1c1c1c;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

h2 {
    font-size: 22px;
    margin-bottom: 25px;
}

#reader {
    width: 100%;
    margin: auto;
}

#resultado {
    margin-top: 25px;
    padding: 15px;
    background: #000;
    border-radius: 10px;
    font-size: 18px;
}