:root {
  --keyboard-bg-color: #ffffff;
  --keyboard-key-text-color: #B1B1B1;
  --keyboard-key-dark-color: #003350;
}

.keyboard {
  box-sizing: border-box;
  width: 100%;
  background-color: var(--keyboard-bg-color);
  user-select: none;
}

.keyboard * {
  margin: 0;
  padding: 0;
}

.keyboard button:focus,
.keyboard input:focus,
.keyboard textarea:focus {
  outline: none;
}

.keyboard__keys {
  text-align: center;
}

.keyboard__keys .keyboard__key {
  position: relative;
  height: 45px;
  width: 7%;
  max-width: 70px;
  background-color: var(--keyboard-bg-color);
  border: 1px solid var(--keyboard-key-text-color);
  border-radius: 5px;
  color: var(--keyboard-key-text-color);
  font-size: 1.2rem;
  font-weight: bold;
  margin: 5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  transition: all 0.09s;
  cursor: pointer;
}

.keyboard__keys .keyboard__key.clear {
  height: 45px;
  width: 45px;
  background-color: transparent;
  border: none;
  margin-right: 15px;
}

.keyboard__keys .keyboard__key:active {
  transform: scale(1.15);
}

.keyboard__keys .keyboard__key.keyboard__key--wide {
  width: 10%;
  max-width: 140px;
}

.keyboard__keys .keyboard__key.keyboard__key--extra-wide {
  width: 50%;
  max-width: 600px;
}

.keyboard__keys .keyboard__key.keyboard__key--activatable::after {
  content: '';
  position: absolute;
  top: 5px;
  right: 5px;
  width: 8px;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
}

.keyboard__keys .keyboard__key.keyboard__key--activatable.keyboard__key--active::after {
  background-color: #5eea59;
}

.keyboard__keys .keyboard__key.keyboard__key--dark {
  border-color: var(--keyboard-key-dark-color);
  color: var(--keyboard-key-dark-color);
}

.keyboard__keys .keyboard__input {
  padding: 15px 10px;
  border: 1px solid var(--keyboard-key-text-color);
  border-radius: 5px;
  color: var(--keyboard-key-text-color);
  font-size: 1.1rem;
  margin: 15px 0;
  width: 60%;
  max-width: 600px;
  letter-spacing: 1.5px;
}

.keyboard__keys .keyboard__input::placeholder {
  color: #fff;
}