:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #212121;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2678b6;
    --tg-theme-button-color: #3390ec;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f0f0f0;
}

@media (prefers-color-scheme: dark) {
    :root {
        --tg-theme-bg-color: #18222d;
        --tg-theme-text-color: #ffffff;
        --tg-theme-hint-color: #aaaaaa;
        --tg-theme-link-color: #62adf5;
        --tg-theme-button-color: #3390ec;
        --tg-theme-button-text-color: #ffffff;
        --tg-theme-secondary-bg-color: #222e3c;
    }
}

body {
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

header p {
    margin: 5px 0 0;
    color: var(--tg-theme-hint-color);
    font-size: 14px;
}

.search-bar {
    display: flex;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--tg-theme-hint-color);
    border-radius: 5px 0 0 5px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
}

.search-bar button {
    padding: 10px 15px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
}

.coupon-section {
    display: flex;
    margin-bottom: 20px;
    align-items: center;
}

.coupon-section input {
    padding: 10px;
    border: 1px solid var(--tg-theme-hint-color);
    border-radius: 5px 0 0 5px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    width: 150px;
}

.coupon-section button {
    padding: 10px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
}

#coupon-status {
    margin-left: 10px;
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

.items-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.item-card {
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 10px;
    padding: 15px;
    display: flex;
    cursor: pointer;
    transition: transform 0.2s;
}

.item-card:hover {
    transform: translateY(-5px);
}

.item-icon {
    width: 60px;
    height: 60px;
    background-size: cover;
    background-position: center;
    border-radius: 5px;
    margin-right: 15px;
}

.item-details {
    flex: 1;
}

.item-title {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.item-description {
    margin: 5px 0;
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

.item-price {
    font-size: 16px;
    font-weight: 600;
    color: var(--tg-theme-link-color);
}

#view-purchases {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
    font-weight: 500;
}

.purchases-container {
    margin-top: 20px;
}

.purchases-container h2 {
    margin-bottom: 15px;
}

.purchase-item {
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
}

.purchase-item h3 {
    margin: 0 0 5px;
}

.purchase-item p {
    margin: 5px 0;
    color: var(--tg-theme-hint-color);
    font-size: 14px;
}

#back-to-store {
    padding: 10px 15px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 15px;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--tg-theme-bg-color);
    padding: 20px;
    border-radius: 10px;
    max-width: 80%;
    width: 100%;
    max-width: 400px;
}

.modal h2 {
    margin-top: 0;
}

.modal-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.modal-buttons button {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#confirm-purchase {
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

#cancel-purchase {
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
}

#close-success-modal {
    width: 100%;
    padding: 10px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 15px;
}

.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100px;
}

.loading-spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--tg-theme-button-color);
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none;
}