body { margin: 0; }
a { text-decoration: none; }
#back { position: fixed; left: 0; top: 0; width: 100%; height: 100%; z-index: 0; }
#back > video { object-position: center; object-fit: cover; width: 100%; height: 100%; }
#button_menu { position: fixed; left: 0; bottom: 0; padding-bottom: 50px; width: 100%; text-align: center; white-space: nowrap; overflow-x: auto; }
#button_menu > a { display: inline-block; vertical-align: middle; margin: 0px 5px; }
#button_menu > a img { height: 50px; }
#logo { margin-top: 50px; position: relative; z-index: 1; text-align: center; }
#logo img { height: 160px; }

#header {
  position: fixed; /* Fixed position */
  top: 50%; /* Center vertically */
  right: 5px; /* Align to the right */
  transform: translateY(-50%); /* Adjust to center vertically */
  z-index: 1;
  padding: 15px;
}

#header > div {
  display: flex;
  flex-direction: column; /* Arrange children vertically */
  align-items: center; /* Center align children horizontally */
}

.header_button {
  display: inline-block;
  margin: 5px; /* Margin between buttons */
  width: 40px;
  height: 40px;
  border-radius: 100%;
  background-color: #070707;
  color: #fff;
  line-height: 34px;
  text-align: center;
  font-size: 15pt;
  text-decoration: none;
  position: relative;
}

.header_button img {
  height: 25px;
  margin: 7px 0px;
}

.header_button > div {
  position: absolute;
  z-index: 10;
  left: -200px; /* Position tooltip to the left of the button */
  top: 0; /* Align with the button vertically */
  width: 180px;
  height: auto;
  display: none;
}

.header_button:hover > div {
  display: block;
}

.header_button > div > div {
  padding: 10px;
  border-radius: 10px;
  background-color: #fff;
  text-align: center;
}

.header_button > div > div img {
  height: 20px;
  margin: 0px 2px;
  opacity: 0.3;
}

.header_button > div > div img:hover {
  opacity: 1;
}

#button { text-align: left; position: relative; z-index: 10; margin-top: 95px; }
#button > * { padding: 12px 25px; border-top-right-radius: 30px; border-bottom-right-radius: 30px; color: #fff; font-size: 8.2pt;
font-family: arial, tahoma; display: inline-block; vertical-align: middle; background-color: #070707; box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3); }