:root {
    --primary: #2563eb;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Readex Pro', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.cart-btn-wrapper {
    position: relative;
    font-size: 20px;
    cursor: pointer;
    background: #eff6ff;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #f97316;
    color: white;
    font-size: 11px;
    font-weight: 700;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Filters */
.filter-section {
    display: flex;
    gap: 10px;
    margin: 30px auto;
}

.filter-btn {
    padding: 8px 18px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s;
}

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

.product-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 15px;
}

.product-title {
    font-size: 16px;
    margin-bottom: 8px;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 15px;
}

.add-to-cart {
    width: 100%;
    padding: 10px;
    background: #0f172a;
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.add-to-cart:hover {
    background: var(--primary);
}

/* Cart Slide-over Panel */
.cart-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 200;
}

.cart-panel {
    position: fixed;
    top: 0; left: -400px;
    width: 350px; height: 100%;
    background: white;
    z-index: 300;
    transition: left 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.cart-panel.open { left: 0; }
.cart-overlay.open { display: block; }

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
}

.close-cart {
    font-size: 24px;
    border: none;
    background: none;
    cursor: pointer;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
}

.cart-footer {
    border-top: 1px solid var(--border);
    padding-top: 15px;
}

.total-price {
    display: flex;
    justify-content: space-between;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}

.checkout-btn {
    width: 100%;
    padding: 12px;
    background: #22c55e;
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
}