body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    background: linear-gradient(135deg, #c9d6ff, #e2e2e2);
    color: #333;
}

header {
    background: #4caf50;
    color: white;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    margin: 5px 0 0;
    font-size: 1.2rem;
}

#game-container {
    max-width: 1000px;
    margin: 20px auto;
}

#game-area {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

#market-section, #portfolio-section {
    width: 45%;
    padding: 15px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#stocks, #portfolio {
    margin-top: 20px;
    text-align: left;
}

.stock, .portfolio-item {
    display: flex;
    justify-content: space-between;
    margin: 10px 0;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: #f9f9f9;
    transition: background 0.3s;
}

.stock:hover, .portfolio-item:hover {
    background: #eef9ee;
}

#controls {
    margin-top: 20px;
    padding: 10px;
}

#end-game-button {
    padding: 10px 20px;
    font-size: 1rem;
    background: #f44336;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

#end-game-button:hover {
    background: #d32f2f;
}