body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 16px;
    background: var(--tg-theme-bg-color, #fff);
    color: var(--tg-theme-text-color, #000);
}
header {
    margin-bottom: 16px;
}
h1 {
    font-size: 20px;
    margin: 0 0 8px 0;
}
#search {
    width: 100%;
    padding: 8px;
    border-radius: 8px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}
#catalog {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.card {
    border: 1px solid #ddd;
    border-radius: 12px;
    padding: 12px;
    background: var(--tg-theme-secondary-bg-color, #f9f9f9);
}
.card h3 {
    margin: 0 0 8px 0;
    font-size: 16px;
}
.card p {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: var(--tg-theme-hint-color, #666);
}
.price {
    font-weight: bold;
    font-size: 18px;
}
.buy-btn {
    margin-top: 8px;
    width: 100%;
    padding: 8px;
    background: var(--tg-theme-button-color, #2481cc);
    color: var(--tg-theme-button-text-color, #fff);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}
.balance {
    font-size: 13px;
    color: var(--tg-theme-hint-color, #666);
}
.actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.actions .buy-btn {
    flex: 1;
    margin: 0;
}
.fav-btn {
    width: 40px;
    padding: 8px;
    background: var(--tg-theme-secondary-bg-color, #eee);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
}