:root {
    --primary-color: #e74c3c;
    --primary-dark: #c0392b;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --white: #ffffff;
    --black: #000000;
    
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-vietnamese: 'Inter', 'Roboto', 'Noto Sans', sans-serif;
    
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    --box-shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    
    --container-max-width: 1200px;
    --header-height: 70px;
    --footer-height: 200px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-vietnamese);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.main-header {
    background: var(--white);
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

.navbar {
    height: 100%;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 700;
    font-size: 1.2rem;
}

.logo img {
    height: 40px;
    width: auto;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: 0.3s;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.navbar-search {
    position: relative;
}

.search-form {
    display: flex;
    align-items: center;
    background: var(--gray-100);
    border-radius: var(--border-radius);
    padding: 8px 12px;
    gap: 10px;
    min-width: 300px;
}

.search-input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 14px;
}

.search-btn {
    background: none;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: 4px;
}

.search-results-header {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: 1001;
    display: none;
}

.search-result-item-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200);
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-result-item-header:hover {
    background: var(--gray-100);
}

.search-result-item-header:last-child {
    border-bottom: none;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--primary-color);
}

.user-menu {
    position: relative;
}

.user-avatar {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: background-color 0.2s;
}

.user-avatar:hover {
    background: var(--gray-100);
}

.user-avatar img,
.avatar-placeholder {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-placeholder {
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    min-width: 200px;
    padding: 8px 0;
    display: none;
    z-index: 1001;
}

.user-dropdown.show {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    text-decoration: none;
    color: var(--gray-700);
    transition: background-color 0.2s;
}

.dropdown-item:hover {
    background: var(--gray-100);
}

.dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: 8px 0;
}

.language-switcher {
    position: relative;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius);
    color: var(--gray-600);
    transition: background-color 0.2s;
}

.lang-toggle:hover {
    background: var(--gray-100);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    min-width: 120px;
    padding: 8px 0;
    display: none;
    z-index: 1001;
}

.lang-dropdown.show {
    display: block;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

.btn-secondary:hover {
    background: var(--primary-dark);
    color: var(--white);
    border-color: var(--primary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-outline:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 60vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-search {
    margin-bottom: 40px;
}

.search-form-large {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    box-shadow: var(--box-shadow-lg);
    max-width: 600px;
    margin: 0 auto;
}

.search-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
}

.search-input,
.search-select {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus,
.search-select:focus {
    border-color: var(--primary-color);
}

.search-btn-large {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-btn-large:hover {
    background: var(--primary-dark);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
}

/* Business Grid */
.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.business-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
}

.business-card.featured {
    border: 2px solid var(--primary-color);
}

.business-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.business-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.business-badges {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.verified {
    background: var(--success-color);
    color: var(--white);
}

.badge.featured {
    background: var(--primary-color);
    color: var(--white);
}

.business-info {
    padding: 20px;
}

.business-name {
    margin-bottom: 8px;
}

.business-name a {
    color: var(--dark-color);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
}

.business-name a:hover {
    color: var(--primary-color);
}

.business-category {
    color: var(--gray-600);
    font-size: 14px;
    margin-bottom: 8px;
}

.business-location {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--gray-600);
    font-size: 14px;
    margin-bottom: 12px;
}

.business-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}

.star {
    color: var(--warning-color);
    font-size: 16px;
}

.star.empty {
    color: var(--gray-300);
}

.rating-text {
    font-weight: 600;
    color: var(--dark-color);
}

.rating-count {
    color: var(--gray-600);
    font-size: 14px;
}

.business-actions {
    display: flex;
    gap: 10px;
}

.business-actions .btn {
    flex: 1;
    justify-content: center;
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.featured-section,
.categories-section,
.cities-section {
    padding: 80px 0;
}

.featured-section {
    background: var(--gray-100);
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.category-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px 20px;
    text-align: center;
    text-decoration: none;
    color: var(--dark-color);
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: var(--box-shadow);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
    color: var(--dark-color);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 24px;
}

.category-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.category-count {
    color: var(--gray-600);
    font-size: 14px;
}

/* Cities Grid */
.cities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.city-card {
    position: relative;
    height: 200px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: var(--white);
    transition: transform 0.2s;
}

.city-card:hover {
    transform: scale(1.05);
    color: var(--white);
}

.city-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.city-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.city-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%);
}

.city-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 1;
}

.city-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 5px;
}

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

/* Footer */
.main-footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    margin: 15px 0 10px;
    font-size: 1.5rem;
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gray-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: background-color 0.2s;
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--white);
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.125rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .search-inputs {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: 40px;
    }
    
    .business-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .navbar-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: var(--box-shadow-lg);
        padding: 20px;
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .navbar-menu.show {
        transform: translateX(0);
    }
    
    .navbar-search {
        order: -1;
    }
    
    .search-form {
        min-width: auto;
    }
    
    .hero-section {
        height: 50vh;
        min-height: 400px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .cities-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .search-form-large {
        padding: 15px;
    }
    
    .business-card {
        margin: 0 5px;
    }
    
    .category-card {
        padding: 20px 15px;
    }
    
    .category-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

/* Loading and Animation States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    display: none;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
}

.modal-overlay.show {
    display: block;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    color: var(--white);
    font-weight: 500;
    box-shadow: var(--box-shadow-lg);
    animation: slideIn 0.3s ease-out;
    min-width: 300px;
}

.toast.success {
    background: var(--success-color);
}

.toast.error {
    background: var(--danger-color);
}

.toast.warning {
    background: var(--warning-color);
}

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