.modal {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    position: relative;
    background-color: #ffffff;
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 420px;
    width: 90%;
    animation: popIn 0.3s ease-in-out;
}

@keyframes popIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-content h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 24px;
    font-weight: 600;
}

.modal-button {
    margin: 10px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

    .modal-button.buy {
        background-color: #4CAF50;
        color: white;
    }

        .modal-button.buy:hover {
            background-color: #45a049;
        }

    .modal-button.sell {
        background-color: #2196F3;
        color: white;
    }

        .modal-button.sell:hover {
            background-color: #1976D2;
        }

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 24px;
    font-weight: bold;
    color: #888;
    cursor: pointer;
    transition: color 0.2s ease;
}

    .close-btn:hover {
        color: #000;
    }