html, body {
  margin: 0;
  height: 100%;
  background: black;
  color: red;
  font-family: monospace, monospace;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

#app {
  width: 90vw;
  max-width: 400px;
}

h1 {
  margin-bottom: 20px;
  font-weight: bold;
}

.centered {
  margin-top: 20px;
}

#secondsLeft {
  font-size: 48px;
  margin-bottom: 20px;
}

input[type="date"] {
  font-size: 18px;
  padding: 5px;
  border-radius: 5px;
  border: none;
}

button {
  background: none;
  border: 1.5px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
  padding: 8px 16px;
  font-size: 18px;
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: red;
  color: black;
}

#saveDob {
  background: red;
  border: none;
  color: black;
}

#saveDob:hover {
  background: darkred;
}

/* Mobile style */
@media (max-width: 768px) {
  #resetBtn {
    opacity: 0.3 !important;
  }
}