/* ============================================
   IntellaPersona - Modern Chat Interface
   Copyright © 2024-2025 Intellecta Solutions
   ============================================ */

:root {
    /* Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    
    /* Neutrals */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1f3a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    padding: var(--space-md) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-icon {
    font-size: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-links a:hover {
    color: var(--primary-light);
}

.nav-links a:hover::after {
    width: 100%;
}

/* WhatsApp Nav Link */
.whatsapp-nav-link {
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-full);
    color: white !important;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-base);
}

.whatsapp-nav-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
}

.whatsapp-nav-link::after {
    display: none;
}

.whatsapp-nav-link i {
    font-size: 1.125rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-sm);
    transition: color var(--transition-fast);
}

.mobile-menu-toggle:hover {
    color: var(--primary-light);
}

.hamburger-icon {
    display: block;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        display: none;
        z-index: 999;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
}

/* ============================================
   PREMIUM PRODUCTS BANNER
   ============================================ */
.products-banner {
    padding: var(--space-xl) var(--space-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-top: 1px solid rgba(99, 102, 241, 0.2);
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    position: relative;
    overflow: hidden;
}

.products-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.banner-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    position: relative;
    z-index: 1;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex: 1;
}

.banner-icon {
    font-size: 3rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.banner-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.banner-text p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.banner-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.banner-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), 0 0 25px rgba(99, 102, 241, 0.4);
}

.banner-cta:active {
    transform: translateY(0);
}

.cta-arrow {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.banner-cta:hover .cta-arrow {
    transform: translateX(4px);
}

/* Responsive Banner */
@media (max-width: 768px) {
    .banner-container {
        flex-direction: column;
        text-align: center;
    }
    
    .banner-content {
        flex-direction: column;
        text-align: center;
    }
    
    .banner-icon {
        font-size: 2.5rem;
    }
    
    .banner-text h3 {
        font-size: 1.25rem;
    }
    
    .banner-text p {
        font-size: 0.9rem;
    }
    
    .banner-cta {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: 8rem var(--space-lg) 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Value Propositions - Flip Card */
.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.value-card-flip {
    perspective: 1000px;
    height: 220px;
    cursor: pointer;
}

.value-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.value-card-flip:hover .value-card-inner {
    transform: rotateY(180deg);
}

.value-card-front,
.value-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.value-card-front {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.value-card-back {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.3);
    transform: rotateY(180deg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.value-card-front h3,
.value-card-back h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.value-card-front p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.value-card-back ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
    width: 100%;
}

.value-card-back ul li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
    line-height: 1.5;
}

.value-card-back ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(99, 102, 241, 0.5);
}

.cta-button:active {
    transform: translateY(0);
}

.cta-buttons-row {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
    flex-wrap: wrap;
}

.whatsapp-cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
}

.whatsapp-cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), 0 0 25px rgba(37, 211, 102, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.whatsapp-cta-button:active {
    transform: translateY(0);
}

.whatsapp-cta-button i {
    font-size: 1.25rem;
}

.pulse-glow {
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: var(--shadow-lg), 0 0 20px rgba(99, 102, 241, 0.3);
    }
    50% {
        box-shadow: var(--shadow-xl), 0 0 40px rgba(99, 102, 241, 0.6);
    }
}

.visitor-info {
    margin-top: var(--space-lg);
    animation: fadeIn 0.5s ease-out;
}

/* Trust Badges */
.trust-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.trust-badge:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.trust-icon {
    font-size: 1.25rem;
}

.trust-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Query Counter */
.query-counter {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-width: 400px;
    margin: 0 auto;
}

.counter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.counter-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.counter-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-light);
}

.counter-value.warning {
    color: var(--warning);
    animation: pulse 1s ease-in-out infinite;
}

.counter-value.danger {
    color: var(--error);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius-full);
    transition: width 0.5s ease-out;
}

.progress-bar.warning {
    background: linear-gradient(90deg, var(--warning) 0%, var(--accent-color) 100%);
}

.progress-bar.danger {
    background: linear-gradient(90deg, var(--error) 0%, var(--warning) 100%);
}

.counter-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}

.counter-hint a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
}

.counter-hint a:hover {
    text-decoration: underline;
}

.info-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-weight: 500;
}

.badge-icon {
    font-size: 1.25rem;
}

/* ============================================
   FEATURES CAROUSEL
   ============================================ */
.features-section {
    padding: var(--space-2xl) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    padding: var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
}

/* Responsive grid for 8 cards */
@media (min-width: 1400px) {
    .card-carousel {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) and (max-width: 1399px) {
    .card-carousel {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .card-carousel {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .card-carousel {
        grid-template-columns: 1fr;
    }
}

.carousel-card {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.carousel-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.carousel-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(99, 102, 241, 0.2);
}

.carousel-card:hover::before {
    opacity: 1;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

/* ============================================
   CHAT SECTION
   ============================================ */
.chat-section {
    padding: var(--space-2xl) var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.chat-container {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.chat-title {
    font-weight: 600;
    font-size: 1.125rem;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.chat-messages {
    height: 500px;
    overflow-y: auto;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.5);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.5);
    border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.7);
}

.welcome-message {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--text-secondary);
}

.welcome-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.welcome-message h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.message {
    display: flex;
    gap: var(--space-sm);
    animation: messageSlideIn 0.3s ease-out;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.message-content {
    max-width: 70%;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    word-wrap: break-word;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.message.assistant .message-content {
    background: rgba(51, 65, 85, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-bottom-left-radius: var(--radius-sm);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* ============================================
   MESSAGE SOURCES
   ============================================ */
.message-sources {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sources-header {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.sources-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.source-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary-color);
    transition: all var(--transition-fast);
}

.source-item:hover {
    background: rgba(99, 102, 241, 0.15);
    border-left-color: var(--primary-light);
}

.source-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.source-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(16, 185, 129, 0.2);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-md);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

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

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

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

.chat-input-container {
    padding: var(--space-lg);
    background: rgba(15, 23, 42, 0.8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-input-wrapper {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-end;
}

.chat-input-wrapper.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.chat-input {
    flex: 1;
    background: rgba(51, 65, 85, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    resize: none;
    max-height: 120px;
    transition: all var(--transition-fast);
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(99, 102, 241, 0.4);
}

.send-button:active:not(:disabled) {
    transform: translateY(0);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-helper-text {
    margin-top: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-xl) var(--space-lg);
    background: rgba(15, 23, 42, 0.8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    margin-top: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .hero {
        padding: 6rem var(--space-md) 3rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .cta-buttons-row {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .whatsapp-cta-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .value-props {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        margin: var(--space-lg) 0;
    }
    
    .value-card-flip {
        height: 200px;
    }
    
    .cta-button {
        font-size: 1rem;
        padding: var(--space-sm) var(--space-lg);
    }
    
    .card-carousel {
        grid-template-columns: 1fr;
    }
    
    .chat-messages {
        height: 400px;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .footer-links {
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .trust-badges {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .trust-badge {
        width: 100%;
        justify-content: center;
    }
    
    .query-counter {
        padding: var(--space-md);
    }
    
    .cta-button {
        padding: var(--space-sm) var(--space-lg);
        font-size: 1rem;
    }
    
    .chat-messages {
        height: 350px;
        padding: var(--space-md);
    }
    
    .message-content {
        max-width: 90%;
        padding: var(--space-sm) var(--space-md);
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .hero,
    .features-section,
    .chat-input-container,
    .footer {
        display: none;
    }
    
    .chat-messages {
        height: auto;
        overflow: visible;
    }
}