:root {
        --bg_10: rgba(240, 247, 255, 0.8);
    }   
    .dark-mode {
        --bg_10: rgba(50, 60, 80, 0.8); 
    }
    .container {
        margin: 0 auto;
        font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    }
    .symbol-title {
        font-size: 20px;
        font-weight: bold;
        padding: 15px 0 8px;
        margin-top: 20px;
    }
    .symbol-items {
        font-size: 22px;
        padding: 15px 0;
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
    }
    .symbol-item {
        padding: 8px 12px;
        border-radius: 4px;
        cursor: pointer;
        transition: all 0.2s ease;
        user-select: none;
    }
    .symbol-item:hover {
        background-color: var(--bg_10);
        transform: scale(1.1);
    }