body {
  font-size: 16px;
  margin: 0px;
}

@media screen and (max-width: 480px) {
  #reloj {
    font-size: 9em;
    font-weight: bolder;
    text-align: center;
    color: brown;
  }

  #logos {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #ffde59;
  }

  #controles {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: #ffde59;
    align-items: center;
    margin-bottom: 1em;
  }

  #cabecera {
    display: flex;
    justify-content: center;
    background-color: #ffde59;
    align-items: center;
    margin-bottom: 2em;
    border-radius: 10px;
  }

  #logoamarillo {
    width: 150px;
  }

  #logocabecera {
    width: 100px;
    border-radius: 10px;
  }

  #logotorneo {
    border-radius: 10px;
  }

  #pie {
    text-align: center;
    margin: 5px;
  }

  h1 {
    background-color: #ffde59;
    font-size: 18px;
    text-align: center;
    padding: 0.5em;
    color: darkgreen;
  }

  img {
    width: 140px;
  }

  .contenidos {
    margin: 0.5em;
  }

  .control {
    font-weight: bolder;
    border: 3px solid salmon;
    border-radius: 1em;
    padding: 1em;
    text-align: center;
  }

  .control:hover {
    font-weight: bolder;
    background-color: brown;
    color: azure;
  }

  .tiempos {
    margin-top: 0.3em;
    margin-bottom: 0.3em;
  }
}

@media screen and (min-width: 480px) {
  #reloj {
    font-size: 15em;
    font-weight: bolder;
    text-align: center;
    color: brown;
  }

  #logos {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffde59;
  }

  #controles {
    display: flex;
    justify-content: center;
    background-color: #ffde59;
    align-items: center;
    margin-bottom: 2em;
  }

  #cabecera {
    display: flex;
    justify-content: center;
    background-color: #ffde59;
    align-items: center;
    margin-bottom: 2em;
    border-radius: 10px;
  }

  #logoamarillo {
    width: 150px;
  }

  #logocabecera {
    width: 150px;
    border-radius: 10px;
  }
 
  #logo5025 {
    width: 170px;
    border-radius: 10px 10px 0px 0px;
  }

  #logotorneo {
    border-radius: 10px;
  }

  #pie {
    text-align: center;
    margin: 5px;
  }

  h1 {
    background-color: #ffde59;
    text-align: center;
    padding: 1em;
    color: darkgreen;
  }

  img {
    width: 250px;
  }

  .contenidos {
    margin: 1em;
    padding: 1em;
  }

  .control {
    font-weight: bolder;
    border: 3px solid salmon;
    border-radius: 1em;
    padding: 1em;
    text-align: center;
  }

  .control:hover {
    font-weight: bolder;
    background-color: brown;
    color: azure;
  }

  .tiempos {
    margin-top: 1em;
    margin-bottom: 1em;
  }
}