* {
  margin: 0;
  padding: 0;
  color: rgb(218, 218, 218);
  font-family: Consolas, Arial;
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: rgb(48, 48, 48);
}

#games {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#sudoku-main h1 {
  font-size: 2.5em;
  margin-top: 0.25em;
  margin-bottom: 0.25em;
}

#sudoku-game {
  display: grid;
  grid-template-columns: repeat(9, 3em);
  row-gap: 2px;
  column-gap: 2px;
}

.sudoku-input {
  border-width: 0.15em;
  border-style: solid;
  outline: none;
  background-color: rgb(53, 53, 53);
  color: white;
  height: 3em;
  text-align: center;
  font-size: 1em;
  caret-color: transparent;
}

@media (max-width: 34em) {
  #sudoku-main h1 {
    font-size: 1.75em;
    margin-top: 0.15em;
    margin-bottom: 0.15em;
  }

  #sudoku-game {
    grid-template-columns: repeat(9, 2em);
    row-gap: 1px;
    column-gap: 1px;
  }

  .sudoku-input {
    border-width: 1px;
    height: 2em;
  }
}

input[data-border-color="black"] {
  border-color: black;
}
input[data-border-color="gray"] {
  border-color: gray;
}
input[data-border-color="red"] {
  border-color: red;
}
.sudoku-input:focus {
  /*background-color: rgb(77, 77, 77);*/
  border-color: white;
}

.sudoku-odd {
  background-color: rgb(37, 37, 37);
}
.sudoku-even {
  background-color: rgb(63, 63, 63);
}

section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#sudoku-status {
  margin: 0.25em 0;
}

#control-buttons {
  margin: 0 0 0.5em 0;
}

button {
  padding: 0.5em 2em;
  background-color: black;
  font-size: 1em;
  border: 1px solid grey;
  border-radius: 4px;
}
button:hover {
  color: white;
  border-color: white;
}
button:active {
  color: black;
  background-color: gray;
  border-color: black;
}

footer {
  background-color: rgb(36, 36, 36);
  color: white;
  height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

footer p,
footer a {
  color: rgb(112, 112, 112);
  text-decoration: none;
}

footer a:hover {
  color: rgb(224, 224, 224);
  text-decoration: underline;
}

/* Remove spinners in Chrome, Safari, Edge, and Opera */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

/* Remove spinners in Firefox */
input[type="number"] {
  -moz-appearance: textfield;
}