/* TravelBuddyAI - Minimal Travel Companion Platform */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: #2d3748;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Main Introduction */
.main-intro {
    padding: 60px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.intro-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 30px;
    padding: 4rem;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.brand-header {
    text-align: center;
    margin-bottom: 3rem;
}

.brand-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: #667eea;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.brand-tagline {
    font-size: 1.3rem;
    color: #718096;
    font-weight: 500;
}

.intro-description h2 {
    font-size: 2.2rem;
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-weight: 700;
    text-align: center;
}

.intro-description > p {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 2.5rem;
    text-align: center;
    line-height: 1.8;
}

.key-benefits {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 1rem 1.5rem;
    border-radius: 25px;
    border: 1px solid #e2e8f0;
}

.benefit-icon {
    font-size: 1.5rem;
}

.benefit-text {
    font-weight: 600;
    color: #2d3748;
}

.travel-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: #667eea;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.stat-label {
    font-size: 1rem;
    color: #718096;
    font-weight: 500;
}

.intro-features {
    margin: 3rem 0;
}

.intro-features h3 {
    font-size: 1.8rem;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 700;
}

.features-list {
    display: grid;
    gap: 2rem;
}

.feature-item {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 15px;
    border-left: 4px solid #667eea;
}

.feature-item h4 {
    font-size: 1.3rem;
    color: #2d3748;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.feature-item p {
    color: #4a5568;
    line-height: 1.7;
}

.testimonial {
    margin-top: 3rem;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    color: white;
}

.testimonial blockquote {
    font-size: 1.2rem;
    font-style: italic;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.testimonial cite {
    font-weight: 600;
    opacity: 0.9;
}

/* AI Assistant Button */
.ai-assistant-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    padding: 15px 20px;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 15px 35px rgba(72, 187, 120, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    z-index: 1000;
    position: relative;
    overflow: hidden;
}

.ai-assistant-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 45px rgba(72, 187, 120, 0.5);
}

.assistant-icon {
    font-size: 1.5rem;
    z-index: 2;
}

.assistant-text {
    font-weight: 600;
    font-size: 1rem;
    z-index: 2;
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border: 3px solid rgba(72, 187, 120, 0.3);
    border-radius: 50px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* Assistant Modal */
.assistant-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    width: 90%;
    max-width: 500px;
    max-height: 70vh;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
    animation: modalSlideUp 0.4s ease;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background 0.3s ease;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    height: 400px;
    display: flex;
    flex-direction: column;
}

.assistant-messages {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

.ai-message {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.message-avatar {
    font-size: 2rem;
    flex-shrink: 0;
}

.message-bubble {
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f3ff 100%);
    padding: 1rem;
    border-radius: 18px;
    border-top-left-radius: 5px;
    border: 1px solid #e2e8f0;
    max-width: 80%;
}

.message-bubble p {
    color: #2d3748;
    line-height: 1.6;
    margin: 0;
}

.message-input-area {
    padding: 1.5rem;
    background: #f8fafc;
    display: flex;
    gap: 1rem;
    border-top: 1px solid #e2e8f0;
}

.message-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.message-input:focus {
    border-color: #667eea;
}

.send-message-btn {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-message-btn:hover {
    transform: scale(1.1);
}

/* Footer */
.footer {
    background: rgba(26, 32, 44, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 2rem;
}

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

.footer-main h4,
.footer-links h4,
.footer-contact h4 {
    margin-bottom: 1rem;
    color: #667eea;
    font-size: 1.2rem;
}

.footer-main p {
    color: #cbd5e0;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.aptos-badge span {
    display: inline-block;
    background: linear-gradient(45deg, #ffd700, #ffed4e);
    color: #1a202c;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

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

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

.footer-links ul li a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover {
    color: #667eea;
}

.footer-contact p {
    color: #cbd5e0;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .intro-content {
        padding: 2.5rem 1.5rem;
        margin: 20px;
    }
    
    .brand-title {
        font-size: 2.5rem;
    }
    
    .intro-description h2 {
        font-size: 1.8rem;
    }
    
    .key-benefits {
        flex-direction: column;
        align-items: center;
    }
    
    .travel-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .ai-assistant-btn {
        bottom: 20px;
        right: 20px;
        padding: 12px 16px;
    }
    
    .assistant-text {
        display: none;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
}