body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: url('pepe.jpg') no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.contenedor {
    background-color: white;
    padding: 20px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    width: 90%;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

.seccion {
    margin-bottom: 20px;
}

h1, h2 {
    color: #333;
    font-size: 28px;
    margin-bottom: 20px;
}

p {
    color: #666;
    font-size: 18px;
    margin-bottom: 20px;
}

#dias-faltantes, #dias-racha, #horas-racha {
    font-size: 18px;
    color: #333;
    margin-left: 5px;
    margin-right: 5px;
}

.contenedor-audio {
    margin-top: 30px;
}

#boton-audio {
    background-color: #333;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    transition-duration: 0.4s;
    cursor: pointer;
}

#boton-audio:hover {
    background-color: white;
    color: black;
}

@media only screen and (min-width: 600px) {
    .contenedor {
        width: 70%;
    }

    h1, h2 {
        font-size: 36px;
    }

    p {
        font-size: 24px;
    }

    #dias-faltantes, #dias-racha, #horas-racha {
        font-size: 24px;
    }
}

@media only screen and (min-width: 900px) {
    .contenedor {
        width: 50%;
    }
}