* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html,
body {
  width: 100%;
  height: 100%;
}

body {
  background: radial-gradient(#fff 5%, #a8acaf);
  padding-top: 30vh;
}

.label {
  display: flex;
  justify-content: center;
  align-items: center;
  transform: translateY(-100px);
  color: rgba(0, 0, 0, 0.25);
  font-size: 32px;
}
.label-time {
  display: block;
  margin: 0 10px;
}
.countdown-holder {
  margin: 0 auto;
  font: 40px/1.5 'Open Sans Condensed', sans-serif;
  text-align: center;
  letter-spacing: -3px;
}

.position {
  display: inline-block;
  height: 1.6em;
  overflow: hidden;
  position: relative;
  width: 1.05em;
}

.placeholder,
.digit {
  position: absolute;
  display: block;
  width: 1em;
  background-color: #444;
  border-radius: 0.2em;
  text-align: center;
  color: #fff;
  letter-spacing: -1px;
}

.placeholder,
.digit.static {
  box-shadow: 1px 1px 1px rgba(4, 4, 4, 0.35);
  background-image: linear-gradient(0deg, #3a3a3a 50%, #444444 50%);
}

@keyframes translate {
  0% {
    transform: translateY(-2.5em);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

.placeholder {
  position: relative;
  display: inline-block;
  animation: translate 0.28s ease-out;
}
.placeholder-parent {
  display: inline-block;
  vertical-align: top;
  margin-right: 12px;
  height: 1.6em;
  overflow: hidden;
  position: relative;
}

.count-div {
  display: inline-block;
  width: 16px;
  height: 1.6em;
  position: relative;
}

.count-div:before,
.count-div:after {
  position: absolute;
  width: 5px;
  height: 5px;
  background-color: #444;
  border-radius: 50%;
  left: 50%;
  margin-left: -3px;
  top: 0.5em;
  box-shadow: 1px 1px 1px rgba(4, 4, 4, 0.5);
  content: '';
}

.count-div:after {
  top: 0.9em;
}

.custom-btn {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 200px;
  height: 40px;
  line-height: 40px;
  border: 1px solid #333;
  border-radius: 8px;
  text-align: center;
  color: #333;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.28s ease;
}
.custom-btn:hover {
  background-color: #333;
  color: #fff;
}

.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  background: rgba(0, 0, 0, 0.6);
}

.modal {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 520px;
  border-radius: 20px;
  padding: 40px;
  background: #fff;
  box-sizing: 0 0 10px rgba(0, 0, 0, 0.5);
  font-size: 14px;
}
.modal .tips {
  margin-bottom: 40px;
  color: #333;
  font-size: 16px;
  font-weight: bold;
}
.modal .input {
  width: 100%;
  height: 40px;
  line-height: 38px;
  padding: 0 20px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  margin-bottom: 80px;
  color: #333;
  outline: none;
}
.modal .btns {
  display: flex;
  justify-content: flex-end;
}
.modal .btns > div {
  width: 100px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  border: 1px solid #333;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  transition: all 0.28s ease;
}
.modal .btns .btn-cancel {
  margin-right: 20px;
  border-color: rgba(0, 0, 0, 0.2);
  color: rgba(0, 0, 0, 0.45);
}
.modal .btns .btn-cancel:hover {
  border-color: #333;
  color: #333;
}
.modal .btns .btn-sure {
  background: #333;
  color: #fff;
}

.modal .btns .btn-sure:hover {
  background: #000;
}

@media (max-width: 800px) {
  .label {
    font-size: 20px;
    transform: translateY(-50%);
  }
  .countdown-holder {
    font-size: 22px;
  }
  .custom-btn {
    width: 80%;
    left: 50%;
    transform: translateX(-50%);
  }
  .modal {
    width: 80%;
    padding: 20px;
    border-radius: 10px;
  }
  .modal .tips {
    margin-bottom: 20px;
  }
  .modal .input {
    margin-bottom: 40px;
  }
  .modal .btns {
    justify-content: space-between;
  }
  .modal .btns > div {
    width: 48%;
  }
}