body {
    font-family: 'Arial', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f8ff;
    margin: 0;
    color: #333;
}

h1 {
    color: #4CAF50;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

#character-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 15px;
    padding: 20px;
    max-width: 900px;
    width: 90%;
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.character-item {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 80px;
    height: 80px;
    background-color: #87CEEB; /* SkyBlue */
    color: white;
    font-size: 2.5em;
    font-weight: bold;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s ease-in-out, background-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    user-select: none; /* Prevent text selection */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.character-item:hover {
    background-color: #4CAF50; /* Green */
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.character-item:active {
    background-color: #2E8B57; /* SeaGreen */
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}