.options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 15px;
    margin: 20px auto;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 2/1;
}

.option-button {
    padding: 20px;
    font-size: 2rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    background: rgba(30, 40, 50, 0.7);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.option-button:hover {
    transform: translateY(-3px);
    background: rgba(40, 50, 60, 0.8);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.option-button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.option-button.correct {
    background: #27ae60;
    color: white;
    animation: pulse 1s;
}

.option-button.incorrect {
    background: #e74c3c;
    color: white;
    animation: shake 0.5s;
}

.char-display {
    font-size: 38px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.morse-hint {
    display: block;
    font-size: 18px;
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-family: monospace;
    letter-spacing: 2px;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(39, 174, 96, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(39, 174, 96, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(39, 174, 96, 0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Start game button for embed mode */
.start-game-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  padding: 20px;
}

.start-game-button {
  background-color: #4a6fa5;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 15px 30px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.start-game-button:hover {
  background-color: #3a5a8c;
  transform: translateY(-2px);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.start-game-button:active {
  transform: translateY(1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}