body {
  background-color: gray;
  color: white;
  font-family: Helvetica;
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
}

input[type="text"],
input[type="button"] {
  font-size: 18px;
  margin: 8px 0;
  padding: 8px;
}

img {
  max-width: 100%;
}

a {
  text-decoration: none;
  color: #18272F;
  font-weight: 700;
  position: relative;
}

a::before {
  content: '';
  background-color: hsla(196, 61%, 58%, .75);
  position: absolute;
  left: 0;
  bottom: 3px;
  width: 100%;
  height: 8px;
  z-index: -1;
  transition: all .3s ease-in-out;
}

a:hover::before {
  bottom: 0;
  height: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  max-width: 400px;
  /* Opcjonalnie: szerokość tabeli */
  margin: 20px auto;
  /* Centrowanie tabeli */
}

td {
  padding: 10px;
  border-top: 2px solid #ccc;
  /* Linie między wierszami */
}

#keypad {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: 10px;
    margin-top: 10px;
    max-width: 200px;
}

.key {
    background-color: #ccc;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    font-size: 1.2em;
    user-select: none;
    border-radius: 5px;
}

.numInput {
    font-size: 1.5em;
    padding: 10px;
    width: 180px;
}

.hidden {
    display: none;
}