* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f5f5f5;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

.game-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}


.calculator-container {
    position: relative;
    margin-bottom: 20px;
}

.calculator-display {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 260px;
    height: 40px;
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 24px;
    text-align: right;
    padding: 5px 10px;
    overflow: hidden;
    white-space: nowrap;
    z-index: 10;
}

.calculator-image-container {
    position: relative;
}

.calculator-image {
    display: block;
    max-width: 100%;
    height: auto;
}


.game-options {
    width: 100%;
    max-width: 600px;
    margin-top: 20px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.game-options h2 {
    text-align: center;
    margin-bottom: 15px;
    color: #444;
    font-size: 1.2rem;
}

.options-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.option-btn {
    padding: 12px;
    font-size: 18px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.option-btn:hover {
    background-color: #45a049;
}


.game-info {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message-area {
    min-height: 50px;
    padding: 10px;
    background-color: #e8f5e9;
    border-radius: 5px;
    text-align: center;
    font-weight: bold;
    color: #2e7d32;
}

.score-area {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background-color: #f1f8e9;
    border-radius: 5px;
}

.score-area p {
    font-size: 16px;
    font-weight: bold;
    color: #333;
}


.controls {
    margin-top: 20px;
    text-align: center;
}

.start-btn {
    padding: 12px 30px;
    font-size: 18px;
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.start-btn:hover {
    background-color: #0b7dda;
}


.success-message {
    color: #2e7d32;
    background-color: #e8f5e9;
    border: 1px solid #c8e6c9;
}

.error-message {
    color: #c62828;
    background-color: #ffebee;
    border: 1px solid #ffcdd2;
}

@media (max-width: 768px) {
    .options-container {
        grid-template-columns: 1fr;
    }
    
    .calculator-display {
        width: 80%;
        max-width: 260px;
    }
}