body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            max-width: 1024px;
            margin: 0 auto;
            background-color: var(--light-bg);
}
h1 {
  margin: 0;
  font-size: 1.1em;
  color: #fff;
  background-color: gray;
  border-bottom: 2px inset #fff;
  padding: 4px 2%;
  text-transform: uppercase;
  text-align: center;
}
h2 {
      font-size: 1em;
      margin: 0;
      color: #0040ff;
      padding-bottom: 5px;
      border-bottom: 1px inset #3498db;
      /*! padding-left: 4%; */
      text-transform: uppercase;
      text-align: center;
}
    .controles, .zoom-controles  {
  margin: 1em 0;
  text-align: center;
}

    button {
      padding: 8px 18px;
      background-color: #4285f4;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
      font-weight: bold;
    }

    button:hover {
      background-color: #028c0b;
    }

    button:disabled {
      background-color: #ccc9c9;
      cursor: not-allowed;
      color: #868181;
    }

    .contador {
      color: #555;
      margin-left: 10px;
      align-self: center;
    }

    .selector {
  border-radius: 6px;
  border: 1px outset #ffffff;
  background-color: #808080;
  color: #fff;
  font-weight: bold;
  padding: 8px 1em;
}

    .visor-container {
  height: 70vh;
  background-color: white;
  border: 1px inset #ebf5fb;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

    .visor-contenido {
      transform-origin: center center;
      transition: transform 0.3s ease;
      width: 100%;
      height: 100%;
      object-fit: contain;
      border: 1px inset white;
    }

    embed.visor-contenido,
    iframe.visor-contenido,
    video.visor-contenido {
      border: none;
    }

    .mensaje-archivo {
      padding: 20px;
      text-align: center;
      color: #555;
    }
.boton-inicio {
      display: inline-block;
      text-align: center;
      text-decoration: none;
      margin: 20px;
      background-color: #3498db;
      color: white;
      float: right;
      border: none;
      padding: 8px 16px;
      border-radius: 50px;
      font-size: 1em;
      transition: all 0.3s ease;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    
    .boton-inicio:hover {
      background-color: #2980b9;
      transform: translateY(-2px);
      box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }