body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(5, 50px);
  gap: 5px;
  margin-bottom: 1rem;
}
.cell {
  width: 50px;
  height: 50px;
  border: 2px solid #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  text-transform: uppercase;
}
.green { background-color: #6aaa64; color: white; }
.yellow { background-color: #c9b458; color: white; }
.gray { background-color: #787c7e; color: white; }
#keyboard {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
  max-width: 500px;
}
.keyboard-row {
  display: flex;
  flex-direction: row;
  gap: 6px;
  width: 100%;
  justify-content: center;
}
.key {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  min-width: 0;
  height: 48px;
  margin: 0;
  padding: 0;
  background: #eee;
  border: 1px solid #bbb;
  border-radius: 6px;
  font-size: 4vw;
  max-font-size: 18px;
  font-weight: 500;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0 1px 1px rgba(0,0,0,0.04);
  transition: background 0.1s, border 0.1s;
  max-width: 48px;
}
.key:active {
  background: #ccc;
}
.key.big {
  flex: 2 1 0;
  max-width: 90px;
  font-size: 3.5vw;
}
@media (max-width: 600px) {
  #keyboard {
    max-width: 100vw;
    gap: 3px;
  }
  .keyboard-row {
    gap: 3px;
  }
  .key {
    height: 36px;
    font-size: 5vw;
    max-width: 36px;
    border-radius: 4px;
  }
  .key.big {
    max-width: 60px;
    font-size: 4vw;
  }
}
#status { margin-top: 1rem; font-weight: bold; }