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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 2rem;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

.search-bar {
    display: flex;
    gap: 0.5rem;
}

.search-bar input {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
}

.search-bar button {
    padding: 0.8rem 1.5rem;
    background: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.2rem;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: white;
    color: #667eea;
}

/* Products */
.products-section {
    padding: 4rem 0;
}

.products-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.product-card {
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 1rem;
    transition: box-shadow 0.3s;
    cursor: pointer;
}

.product-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.product-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 8px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.product-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.product-card .price {
    color: #667eea;
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.product-card .stock {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 1rem;
}

.product-card button {
    width: 100%;
    padding: 0.8rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.product-card button:hover {
    background: #5568d3;
}

/* Features */
.features {
    background: #f5f7fa;
    padding: 4rem 0;
}

.features .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature {
    text-align: center;
    padding: 2rem;
}

.feature .icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: #666;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav {
        display: flex;
        gap: 1rem;
    }
    
    nav a {
        margin-left: 0;
    }
    
    .hero h2 {
        font-size: 1.8rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
}