:root {
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #f47b54;
    --light-bg: #f9f9f9;
    --dark-text: #333;
    --light-text: #fff;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.search-container {
    position: relative;
    width: 40%;
}

.search-input {
    width: 100%;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #000;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow);
    z-index: 10;
    display: none;
}

.autocomplete-item {
    padding: 0.5rem 1rem;
    cursor: pointer;
}

.autocomplete-item:hover {
    background-color: #444;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--accent-color);
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.hero {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.product-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

.product-image {
    height: 200px;
    width: 100%;
    object-fit: contain;
    background-color: #f5f5f5;
    padding: 1rem;
}

.product-info {
    padding: 1rem;
}

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

.product-category {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.product-price {
    font-weight: bold;
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    text-decoration: none;
}

.btn:hover {
    background-color: #e06a46;
}

.btn-secondary {
    background-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #115070;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 2rem;
}

.dashboard-sidebar {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.dashboard-main {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.user-profile {
    text-align: center;
    margin-bottom: 2rem;
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 1rem;
}

.dashboard-menu {
    list-style: none;
}

.dashboard-menu li {
    margin-bottom: 0.8rem;
}

.dashboard-menu a {
    display: block;
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--dark-text);
    transition: background-color 0.3s;
}

.dashboard-menu a:hover, .dashboard-menu a.active {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.dashboard-section {
    margin-bottom: 2rem;
}

.recommendation-tabs {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1.5rem;
}

.recommendation-tab {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
}

.recommendation-tab.active {
    border-bottom-color: var(--accent-color);
    color: var(--accent-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

footer {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding: 0 1rem;
}

.footer-column h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul li a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column ul li a:hover {
    color: var(--accent-color);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 2rem;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-container {
        width: 100%;
    }
    
    nav ul {
        margin-top: 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}