:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f4f4f5;
}

* {
    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);
    color: var(--tg-theme-text-color);
    overflow-x: hidden;
    padding-bottom: 100px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
.header {
    text-align: center;
    padding: 24px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin: 0 -16px 20px -16px;
    border-radius: 0 0 24px 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
}

/* Categories */
.categories {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 12px 0;
    margin-bottom: 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.categories::-webkit-scrollbar {
    display: none;
}

.category-btn {
    padding: 10px 20px;
    border: 2px solid var(--tg-theme-button-color);
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.category-btn.active {
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

/* Search */
.search-box {
    margin-bottom: 20px;
}

.search-box input {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--tg-theme-secondary-bg-color);
    border-radius: 16px;
    font-size: 15px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.product-card {
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 16px;
    padding: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.product-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.product-name {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.product-description {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--tg-theme-button-color);
    margin-bottom: 10px;
}

.add-to-cart-btn {
    width: 100%;
    padding: 10px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.add-to-cart-btn:active {
    transform: scale(0.95);
}

/* Cart Float Button */
.cart-float-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

.cart-float-btn:active {
    transform: scale(0.9);
}

#cart-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ef4444;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

/* Cart */
.cart {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--tg-theme-bg-color);
    border-radius: 24px 24px 0 0;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
    padding: 20px;
    max-height: 70vh;
    overflow-y: auto;
    z-index: 999;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 12px;
    margin-bottom: 10px;
}

.checkout-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 16px;
    transition: all 0.2s ease;
}

.checkout-btn:active {
    transform: scale(0.98);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--tg-theme-hint-color);
}

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