:root {
  --app-height: 100%;
}

html {
  overflow-x: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  overflow-x: hidden;
  height: 100vh;
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-weight: bold;
  color: white;
  text-align: center;
  transition: background 100ms linear;
  background-size: 200% 200%;
}

h1 {
  font-size: 3.25em;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
  margin: 0 15px 15px 15px;
}

table {
  margin: auto;
  border-collapse: collapse;
}

td {
  padding: 5.5px;
  min-width: 150px;
}

.button-container {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  padding: 16px;
}

button {
  flex: 1 1 48%;
  min-width: 75px;
  padding: 12px;
  border: none;
  font-size: 18px;
  cursor: pointer;
  border-radius: 8px;
  font-weight: bold;
  transition: all ease-in-out;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

button:hover {
  background: rgba(255, 255, 255, 0.4);
  color: black;
  transform: scale(1.05);
}

#main {
  position: relative;
  top: -5vh;
}

/* https://stackoverflow.com/questions/826782/how-to-disable-text-selection-highlighting */
.noselect {
  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}