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

:root {
    --primary: #3498db;
    --secondary: #2c3e50;
    --accent: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
    color: #ffdd40;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 25px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 12px;
    border-radius: 4px;
}

.nav-links a:hover, .nav-links a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background: #2980b9;
}

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

.btn-secondary:hover {
    background: #1e2a38;
}

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

.btn-success:hover {
    background: #219653;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

.btn-icon {
    padding: 8px 12px;
    background: transparent;
    color: var(--dark);
}

.btn-icon:hover {
    background: #f0f0f0;
}

/* Hero Section */
#hero {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9)), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect fill="%233498db" opacity="0.2" width="50" height="50"/><rect fill="%233498db" opacity="0.2" x="50" y="50" width="50" height="50"/></svg>');
    background-size: 300px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
    color: #555;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

/* Section Styling */
section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    color: var(--secondary);
    position: relative;
}

.section-title:after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary);
    margin: 15px auto;
    border-radius: 2px;
}

/* Card Styles */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.card-header {
    background: var(--primary);
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 1.5rem;
}

.card-body {
    padding: 20px;
}

.card-body p {
    margin-bottom: 20px;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    align-items: center;
}

.profile-img {
    background: #ddd;
    border-radius: 10px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #777;
    font-size: 5rem;
}

.about-text h3 {
    margin-bottom: 15px;
    color: var(--secondary);
}

.about-text p {
    margin-bottom: 15px;
}

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

.social-icons a {
    color: var(--dark);
    font-size: 1.5rem;
    transition: color 0.3s;
}

.social-icons a:hover {
    color: var(--primary);
}

/* Chat Bot Styles */
.chat-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.chat-header {
    background: var(--primary);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-status {
    background: var(--success);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.chat-messages {
    padding: 20px;
    height: 400px;
    overflow-y: auto;
    border-bottom: 1px solid #eee;
}

.message {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}

.message.bot {
    flex-direction: row;
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 10px;
    flex-shrink: 0;
}

.message-content {
    max-width: 70%;
    padding: 12px 15px;
    border-radius: 20px;
    position: relative;
}

.bot .message-content {
    background: #eef5ff;
    border-top-left-radius: 5px;
}

.user .message-content {
    background: var(--primary);
    color: white;
    border-top-right-radius: 5px;
}

.message-time {
    font-size: 0.7rem;
    opacity: 0.7;
    display: block;
    margin-top: 5px;
}

.chat-input {
    display: flex;
    padding: 15px;
}

.chat-input input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 30px;
    outline: none;
}

.chat-input button {
    margin-left: 10px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 30px;
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.3s;
}

.chat-input button:hover {
    background: #2980b9;
}

.chat-suggestions {
    margin-top: 30px;
    text-align: center;
}

.suggestion-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.suggestion-btn {
    padding: 8px 15px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* Member Chat Styles */
.chat-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    height: 600px;
}

.chat-sidebar {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 15px;
    background: var(--primary);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    margin: 0;
}

.member-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.member-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 10px;
    transition: background 0.3s;
}

.member-item:hover {
    background: #f5f5f5;
}

.member-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
}

.member-info h4 {
    margin: 0;
    font-size: 1rem;
}

.member-info p {
    margin: 0;
    font-size: 0.8rem;
    opacity: 0.7;
}

.member-item.online .member-info p {
    color: var(--success);
}

.member-item.away .member-info p {
    color: var(--warning);
}

.member-item.offline .member-info p {
    color: #999;
}

.chat-main {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.chat-main .chat-header {
    border-radius: 10px 10px 0 0;
}

.chat-main .chat-messages {
    flex: 1;
    padding: 15px;
}

.message.received {
    display: flex;
    margin-bottom: 15px;
}

.message.sent {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 15px;
}

.message-sender {
    font-weight: bold;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.chat-main .chat-input {
    padding: 15px;
    border-top: 1px solid #eee;
    display: flex;
    align-items: center;
}

.input-actions {
    display: flex;
    margin-right: 10px;
}

.chat-main .chat-input input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 20px;
    outline: none;
}

/* E-Commerce Styles */
.ecommerce-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.products-section {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.filter-options {
    display: flex;
    gap: 10px;
}

.filter-options select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.product-card {
    background: #f9f9f9;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

.product-img {
    height: 180px;
    background: #f1f1f1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #777;
    font-size: 3rem;
}

.product-info {
    padding: 15px;
}

.product-title {
    font-weight: bold;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.product-price {
    color: var(--accent);
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.product-description {
    font-size: 0.9rem;
    margin-bottom: 15px;
    color: #666;
}

.product-actions {
    display: flex;
    justify-content: space-between;
}

.sell-product-section {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    align-self: start;
}

.sell-product-section h3 {
    margin-bottom: 20px;
    color: var(--secondary);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.form-group textarea {
    resize: vertical;
}

.payment-methods {
    margin-top: 40px;
    text-align: center;
}

.payment-icons {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 20px;
}

.payment-icon {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary);
}

.payment-icon p {
    margin-top: 10px;
    font-size: 1rem;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    margin-bottom: 10px;
}

.footer-section .social-icons a {
    color: white;
}

.footer-bottom {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--secondary);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        margin: 10px 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .card-container {
        grid-template-columns: 1fr;
    }
    
    .chat-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .chat-sidebar {
        height: 300px;
    }
    
    .ecommerce-layout {
        grid-template-columns: 1fr;
    }
    
    .payment-icons {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    }