/* Modern HexaLearn Website - AI-Powered Design */

/* ========================================
   CSS RESET & BASE STYLES
======================================== */

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: #ffffff;
    overflow-x: hidden;
}

/* ========================================
   CSS VARIABLES
======================================== */

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background: #ffffff;
    --background-secondary: #f9fafb;
    --background-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-ai: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --gradient-text: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========================================
   TYPOGRAPHY
======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.025em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* ========================================
   UTILITY CLASSES
======================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

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

/* ========================================
   BUTTONS
======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

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

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

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

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

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ========================================
   HEADER & NAVIGATION
======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.nav {
    padding: var(--spacing-lg) 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand .logo i {
    color: var(--primary-color);
    font-size: 2rem;
}

.nav-menu {
    display: flex;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

.nav-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ========================================
   HERO SECTION
======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    opacity: 0.9;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) translateX(0px); }
    50% { transform: translateY(-20px) translateX(10px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    color: white;
    margin-bottom: var(--spacing-xl);
    line-height: 1.1;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-visual {
    position: relative;
}

.hero-image-container {
    position: relative;
    height: 600px;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: white;
    font-weight: 600;
    animation: floatCard 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.5rem;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

.hero-main-graphic {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
}

.ai-circuit {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: rotate 20s linear infinite;
}

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

.circuit-node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.6);
    animation: pulse 2s ease-in-out infinite;
}

.circuit-node:nth-child(1) {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.circuit-node:nth-child(2) {
    bottom: 20px;
    right: 30px;
}

.circuit-node:nth-child(3) {
    bottom: 20px;
    left: 30px;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.circuit-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.8), transparent);
    animation: flow 3s ease-in-out infinite;
}

.circuit-line:nth-child(4) {
    top: 50%;
    left: 20%;
    width: 60%;
    transform: translateY(-50%) rotate(30deg);
}

.circuit-line:nth-child(5) {
    top: 50%;
    left: 20%;
    width: 60%;
    transform: translateY(-50%) rotate(-30deg);
}

@keyframes flow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* ========================================
   SERVICES SECTION
======================================== */

.services {
    padding: var(--spacing-3xl) 0;
    background: var(--background-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

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

.service-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-title {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.service-description {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.service-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.service-features i {
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.service-link i {
    transition: transform var(--transition-fast);
}

.service-link:hover i {
    transform: translateX(4px);
}

/* ========================================
   AI FEATURES SECTION
======================================== */

.ai-features {
    padding: var(--spacing-3xl) 0;
    background: var(--background-dark);
    color: white;
}

.ai-features-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.ai-features .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.ai-features .section-title {
    color: white;
}

.ai-features .section-description {
    color: rgba(255, 255, 255, 0.8);
}

.feature-list {
    margin: var(--spacing-2xl) 0;
}

.feature-item {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-ai);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-content h4 {
    margin-bottom: var(--spacing-sm);
    color: white;
}

.feature-content p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0;
}

.ai-features-visual {
    position: relative;
}

.ai-dashboard {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-large);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.dashboard-header h4 {
    color: white;
    margin-bottom: 0;
}

.dashboard-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
}

.control.active {
    background: var(--accent-color);
}

.dashboard-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.metric-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.metric-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-icon i {
    color: white;
    font-size: 1.25rem;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.metric-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

.progress-section h5 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.progress-item {
    margin-bottom: var(--spacing-lg);
}

.progress-item span {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

/* ========================================
   ABOUT SECTION
======================================== */

.about {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-highlights {
    margin-top: var(--spacing-2xl);
}

.highlight {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.highlight i {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.highlight h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.highlight p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

.team-showcase {
    background: var(--background-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-medium);
}

.showcase-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.showcase-header h4 {
    color: var(--text-primary);
}

.showcase-header p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

.team-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.team-member {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

.member-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.member-info h5 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.member-info span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========================================
   BLOG SECTION
======================================== */

.blog {
    padding: var(--spacing-3xl) 0;
    background: var(--background-secondary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.blog-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-large);
}

.blog-card.featured-post {
    grid-column: span 2;
}

.blog-image {
    position: relative;
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-category {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.blog-icon {
    font-size: 3rem;
    color: white;
    opacity: 0.8;
}

.blog-content {
    padding: var(--spacing-xl);
}

.blog-title {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    line-height: 1.3;
}

.blog-excerpt {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-light);
}

.blog-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.blog-link i {
    transition: transform var(--transition-fast);
}

.blog-link:hover i {
    transform: translateX(4px);
}

/* ========================================
   CONTACT SECTION
======================================== */

.contact {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-methods {
    margin-top: var(--spacing-2xl);
}

.contact-method {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.method-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.method-info h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.method-info p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

.contact-form-container {
    background: var(--background-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-medium);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    background: white;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group label {
    position: absolute;
    top: -8px;
    left: var(--spacing-lg);
    background: white;
    padding: 0 var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ========================================
   FOOTER
======================================== */

.footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo i {
    color: var(--primary-color);
    font-size: 2rem;
}

.brand-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.link-group h4 {
    margin-bottom: var(--spacing-lg);
    color: white;
}

.link-group a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   AI CHAT WIDGET
======================================== */

.ai-chat-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 350px;
    max-height: 500px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-large);
    z-index: var(--z-modal);
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.ai-chat-widget.active {
    display: flex;
}

.chat-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.chat-info span {
    font-size: 0.875rem;
    opacity: 0.8;
}

.chat-close {
    margin-left: auto;
    background: none;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

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

.chat-messages {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
    max-height: 300px;
}

.chat-message {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.chat-message.bot .message-avatar {
    width: 30px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
}

.message-content {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    max-width: 80%;
}

.message-content p {
    margin-bottom: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.chat-input {
    display: flex;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--background-secondary);
}

.chat-input input {
    flex: 1;
    border: none;
    background: none;
    padding: var(--spacing-md);
    font-size: 0.875rem;
    outline: none;
}

.chat-input button {
    background: var(--gradient-primary);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.chat-input button:hover {
    opacity: 0.8;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */

@media (max-width: 1024px) {
    .hero-content,
    .ai-features-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-image-container {
        height: 400px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .blog-card.featured-post {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-buttons .btn:first-child {
        display: none;
    }
    
    .hero {
        min-height: 80vh;
        text-align: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .ai-chat-widget {
        width: calc(100vw - 40px);
        bottom: 20px;
        right: 20px;
        left: 20px;
    }
    
    .section-header {
        text-align: left;
    }
    
    .floating-card {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.25rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ========================================
   ANIMATIONS & INTERACTIONS
======================================== */

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.animate-on-scroll.from-left {
    animation: fadeInLeft 0.6s ease forwards;
}

.animate-on-scroll.from-right {
    animation: fadeInRight 0.6s ease forwards;
}

/* ========================================
   ACCESSIBILITY
======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-color: #666666;
        --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.3);
        --shadow-large: 0 8px 16px rgba(0, 0, 0, 0.3);
    }
}