body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 16px;
    background-color: var(--tg-theme-bg-color, #fff);
    color: var(--tg-theme-text-color, #222);
}

.container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.product-card {
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 16px;
    text-align: left;
    transition: transform 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.product-card h3 {
    margin: 0 0 8px 0;
    font-size: 18px;
    color: var(--tg-theme-text-color, #222);
}

.product-card p {
    margin: 4px 0;
    color: var(--tg-theme-hint-color, #666);
    font-size: 14px;
}

.product-card .price {
    font-weight: bold;
    font-size: 16px;
    color: var(--tg-theme-text-color, #222);
    margin-top: 8px;
}

.product-card button {
    background-color: var(--tg-theme-button-color, #40a7e3);
    color: var(--tg-theme-button-text-color, #fff);
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    width: 100%;
    margin-top: 12px;
    transition: opacity 0.2s;
}

.product-card button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#status {
    margin-top: 20px;
    padding: 12px;
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 8px;
    word-break: break-word;
}

#check-payment-btn {
    background-color: var(--tg-theme-button-color, #40a7e3);
    color: var(--tg-theme-button-text-color, #fff);
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    margin-top: 10px;
}

#check-payment-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#manual-payment-id {
    padding: 8px;
    margin: 10px 0;
    width: 80%;
    border: 1px solid var(--tg-theme-hint-color, #ccc);
    border-radius: 8px;
    font-size: 14px;
}

#test-payment-btn {
    background-color: var(--tg-theme-button-color, #40a7e3);
    color: var(--tg-theme-button-text-color, #fff);
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    margin-top: 10px;
    opacity: 0.9;
}
#test-payment-btn:hover {
    opacity: 1;
}