* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    line-height: 1.6;
    padding-bottom: 80px;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
}

.header {
    position: sticky;
    top: 0;
    background: var(--tg-theme-bg-color, #ffffff);
    border-bottom: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
}

.header h1 {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin: 0;
    pointer-events: none;
    white-space: nowrap;
}

.back-btn {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--tg-theme-link-color, #3390ec);
    cursor: pointer;
    padding: 8px;
    flex-shrink: 0;
    z-index: 1;
}

.cart-btn {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    flex-shrink: 0;
    z-index: 1;
}

.cart-btn span {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    padding: 2px 8px;
    font-size: 14px;
}

.categories {
    padding: 16px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.category-card {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.category-card:active {
    transform: scale(0.98);
}

.category-card-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    background: var(--tg-theme-hint-color, #e0e0e0);
}

.category-card-info {
    padding: 12px;
}

.category-card-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.category-card-count {
    font-size: 12px;
    color: var(--tg-theme-hint-color, #999999);
}

.products {
    padding: 16px;
}

.product-card {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.product-image {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    background: var(--tg-theme-hint-color, #e0e0e0);
    flex-shrink: 0;
}

.product-info {
    flex: 1;
    min-width: 0;
}

.product-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.product-description {
    font-size: 14px;
    color: var(--tg-theme-hint-color, #666666);
    margin-bottom: 8px;
    line-height: 1.4;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
}

.product-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--tg-theme-link-color, #3390ec);
}

.add-to-cart-btn {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 20px;
    padding: 8px 20px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.add-to-cart-btn:active {
    opacity: 0.8;
}

.cart {
    padding: 16px;
}

.cart-item {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.cart-item-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    background: var(--tg-theme-hint-color, #e0e0e0);
    flex-shrink: 0;
}

.cart-item-info {
    flex: 1;
    min-width: 0;
}

.cart-item-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.cart-item-price {
    font-size: 14px;
    color: var(--tg-theme-hint-color, #666666);
    margin-bottom: 8px;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.quantity-btn {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.quantity-btn:active {
    opacity: 0.8;
}

.quantity-display {
    font-size: 16px;
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

.cart-item-total {
    font-size: 18px;
    font-weight: 700;
    color: var(--tg-theme-link-color, #3390ec);
    margin-left: auto;
}

.cart-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--tg-theme-bg-color, #ffffff);
    border-top: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    padding: 16px;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--tg-theme-hint-color, #e0e0e0);
}

.btn-primary {
    width: 100%;
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 12px;
    padding: 16px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 8px;
    transition: opacity 0.2s;
}

.btn-primary:active {
    opacity: 0.8;
}

.btn-secondary {
    width: 100%;
    background: transparent;
    color: var(--tg-theme-link-color, #3390ec);
    border: 1px solid var(--tg-theme-link-color, #3390ec);
    border-radius: 12px;
    padding: 12px;
    font-size: 16px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-secondary:active {
    opacity: 0.8;
}

.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--tg-theme-hint-color, #999999);
    font-size: 16px;
}

.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--tg-theme-hint-color, #999999);
    font-size: 16px;
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--tg-theme-secondary-bg-color, #333333);
    color: var(--tg-theme-button-text-color, #ffffff);
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 14px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
}

/* Checkout form styles */
.checkout-form {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
}

.checkout-form h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--tg-theme-text-color, #000000);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    border-radius: 8px;
    font-size: 16px;
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--tg-theme-button-color, #3390ec);
    box-shadow: 0 0 0 2px rgba(51, 144, 236, 0.1);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.form-actions .btn-primary,
.form-actions .btn-secondary {
    flex: 1;
    margin-bottom: 0;
}

#checkout-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}