html,body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  padding: 20px;
  height:100dvh;
  -webkit-user-select: none;  /* Safari */
  -moz-user-select: none;     /* Firefox */
  -ms-user-select: none;      /* IE10+ */
  user-select: none;          /* Standard */
  overflow:hidden;
  box-sizing: border-box;
}

h1 {
  text-align: center;
  margin-bottom: 40px;
  height:5%;
}

.calendar-layout {
  display: flex;
  height: 95%;
  box-sizing: border-box;
}