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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    position: absolute;
    width: 100%;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

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

.nav-links a:hover {
    opacity: 0.8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    max-width: 800px;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    max-width: 600px;
    opacity: 0.9;
}

.cta-button {
    background: #e74c3c;
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.cta-button.secondary {
    background: #27ae60;
}

/* Demo Section */
.demo-section {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.demo-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #1e3a5f;
}

.demo-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
}

.demo-container {
    max-width: 600px;
    margin: 0 auto;
}

.hotel-selector {
    margin-bottom: 1rem;
    text-align: center;
}

.hotel-selector label {
    margin-right: 0.5rem;
    font-weight: 500;
}

.hotel-selector select {
    padding: 0.5rem 1rem;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1rem;
}

/* Chat Container */
.chat-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
    overflow: hidden;
}

.chat-header {
    background: #1e3a5f;
    color: white;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 45px;
    height: 45px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.header-info {
    display: flex;
    flex-direction: column;
}

.header-info .name {
    font-weight: bold;
}

.header-info .status {
    font-size: 0.85rem;
    color: #2ecc71;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 1rem;
    background: #f8f9fa;
}

.message {
    margin-bottom: 1rem;
    display: flex;
}

.message.bot {
    justify-content: flex-start;
}

.message.user {
    justify-content: flex-end;
}

.message-content {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 15px;
    line-height: 1.5;
}

.message.bot .message-content {
    background: white;
    border: 1px solid #e0e0e0;
    border-bottom-left-radius: 5px;
}

.message.user .message-content {
    background: #1e3a5f;
    color: white;
    border-bottom-right-radius: 5px;
}

.chat-input-container {
    display: flex;
    padding: 1rem;
    background: white;
    border-top: 1px solid #eee;
}

#chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
}

#chat-input:focus {
    border-color: #1e3a5f;
}

#send-button {
    background: #1e3a5f;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    margin-left: 0.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

#send-button:hover {
    background: #2d5a87;
}

#send-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.demo-cta {
    text-align: center;
    margin-top: 2rem;
}

.demo-cta p {
    margin-bottom: 1rem;
    color: #666;
}

/* Features Section */
.features-section {
    padding: 5rem 5%;
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e3a5f;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

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

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

.feature-card h3 {
    color: #1e3a5f;
    margin-bottom: 0.5rem;
}

/* Contact Section */
.contact-section {
    padding: 5rem 5%;
    background: #1e3a5f;
    color: white;
    text-align: center;
}

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

.contact-info {
    margin-top: 2rem;
}

.contact-info p {
    font-size: 1.25rem;
    margin: 0.5rem 0;
}

/* Footer */
.footer {
    background: #152a3f;
    color: white;
    text-align: center;
    padding: 1.5rem;
}

/* Loading Animation */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 0.75rem 1rem;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 15px;
    border-bottom-left-radius: 5px;
    width: fit-content;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #90a4ae;
    border-radius: 50%;
    animation: bounce 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .chat-messages {
        height: 350px;
    }
}