html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #000000;
  overflow: hidden;
  user-select: none;
}

/* z-index: 1 asegura que el video NUNCA quede tapado por el fondo negro del body */
#video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  background-color: #000000;
  z-index: 1;
  transition: 0.5s opacity;
}

.stopfade {
  opacity: 0.8;
}

/* Marco encima del video (z-index: 2) sin bloquear clics */
article {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 10px solid rgba(255, 255, 255, 0.45);
  margin: 10px;
  z-index: 2;
  pointer-events: none;
}

/* Botones encima de todo (z-index: 10) */
a {
  background: rgba(0, 0, 0, 0.25);
  text-decoration: none;
  cursor: pointer;
  padding: 0.5em 2em;
  border: 0.16em solid #FFFFFF;
  margin: 0 0.3em 0.3em 0;
  box-sizing: border-box;
  text-transform: uppercase;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 14px;
  color: #FFFFFF;
  text-align: center;
  transition: 0.3s background;
  z-index: 10;
}

a:hover {
  background: rgba(0, 0, 0, 0.5);
}

a.button5 {
  position: fixed;
  display: inline-block;
  bottom: 13%;
  right: 35px;
  width: 162px;
}

a.button2 {
  position: fixed;
  display: inline-block;
  bottom: 8%;
  right: 35px;
  width: 162px;
}

a.button3 {
  position: fixed;
  display: inline-block;
  bottom: 3%;
  right: 35px;
  width: 162px;
}