html, body {
  margin: 0px;
  padding: 0px;
  scroll-behavior: smooth;
  background-color: #721319;
  overflow-y: scroll;
  scrollbar-width: none;
  -ms-overflow-style: none;

  ::-webkit-scrollbar {
    width: 0;
    height: 0;
  }
}

.section {
  display: flex;
  margin-top: -1px;
}

.section video {
  width: 100vw;       
  height: auto;       
  object-fit: cover;
  will-change: transform;
  backface-visibility: hidden;
  display: block;
}

#c1 {
  display: flex;
  height: 100vh;
  justify-content: center;
  align-items: center;
}

#c1p {
  position: relative;
}

.envelop {
  width: 100%;
  display: block;
  object-fit: contain;  
}

@media screen and (min-width: 500px) {
  .envelop {
    width: 500px;
    height: 625px;
  }
}

.button {
  position: absolute;                   
  pointer-events: auto;  
  cursor: pointer;
  width: 30%;
  top: 73%;
  left: 52%;
  transform: translate(-50%, -50%);
}

.button.open {
  animation: popOpen 0.5s ease forwards;
}

@keyframes popOpen {
  0%   { transform: translate(-50%, -50%) scale(1); }
  50%  { transform: translate(-50%, -50%) scale(1.4); }
  100% { transform: translate(-50%, -50%) scale(1); }
}

.countdown {
  font-family: Arial, sans-serif;
  text-align: center;
  color: #030303;
  position: absolute;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.time {
  font-size: 5vw;
  font-weight: bold;
  letter-spacing: 5px;
}

.labels {
  font-size: 2vw;
  font-weight: 500;
  display: flex;
  justify-content: space-around;
  margin-top: 10px;
}

.labels span {
  width: 25%;
  text-align: center;
}

@media screen and (min-width: 425px) {
  .time {
    font-size: 6vw;
  }
  .labels {
    font-size: 3vw;
  }
}

@media screen and (min-width: 768px) {
  .time {
    font-size: 55px;
  }
  .labels {
    font-size: 18px;
  }
}