/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --bg-dark: #0f172a;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --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);
    --navbar-height: 92px;
    --navbar-spacing: 100px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    min-height: 92px;
    height: auto;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.75rem;
    transition: opacity 0.2s ease;
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
    display: none; /* Hidden by default */
}

.logo-img.loaded {
    display: block;
}

.logo-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    display: inline-block;
}

/* Hide text when logo image is loaded */
.logo-img.loaded ~ .logo-text {
    display: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.language-switcher {
    display: flex;
    gap: 0;
    background: var(--bg-light);
    padding: 0.25rem;
    border-radius: 8px;
    margin-right: 1rem;
}

.desktop-lang-switcher {
    margin-right: 1rem;
}

.mobile-lang-switcher {
    display: none;
    padding: 1rem;
    justify-content: center;
}

.mobile-lang-switcher .language-switcher {
    margin: 0 auto;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-medium);
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.lang-btn:hover {
    color: var(--primary-color);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
    z-index: -1;
}

.gradient-overlay {
    display: none;
}

.floating-shapes {
    display: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: var(--text-dark);
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    letter-spacing: -1px;
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
    color: var(--text-medium);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Animated Code Editor */
.code-editor-container {
    width: 100%;
    max-width: 500px;
    margin-bottom: 2rem;
}

.code-editor {
    background: #1e293b;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.code-editor-header {
    background: #0f172a;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.code-editor-dots {
    display: flex;
    gap: 0.5rem;
}

.code-editor-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #475569;
}

.code-editor-dots span:nth-child(1) {
    background: #ef4444;
}

.code-editor-dots span:nth-child(2) {
    background: #f59e0b;
}

.code-editor-dots span:nth-child(3) {
    background: #10b981;
}

.code-editor-title {
    color: #94a3b8;
    font-size: 0.875rem;
    font-family: 'Courier New', monospace;
}

.code-editor-body {
    padding: 1.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.8;
    min-height: 200px;
}

.code-line {
    color: #e2e8f0;
    margin-bottom: 0.5rem;
}

.code-indent {
    padding-left: 1.5rem;
}

.code-indent-2 {
    padding-left: 3rem;
}

.code-keyword {
    color: #c792ea;
}

.code-string {
    color: #c3e88d;
}

.code-function {
    color: #82aaff;
}

.code-class {
    color: #ffcb6b;
}

.code-operator {
    color: #89ddff;
}

.code-var {
    color: #f78c6c;
}

.code-cursor {
    color: #fff;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.floating-card {
    position: absolute;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    border: 1px solid var(--border-color);
}

.card-1 {
    top: 10%;
    left: 10%;
}

.card-2 {
    top: 50%;
    right: 10%;
}

.card-3 {
    bottom: 10%;
    left: 20%;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.card-text {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-light);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-light);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

/* Section Styles */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-dark);
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-medium);
    font-weight: 400;
}

/* About Section */
.about {
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-medium);
    font-size: 0.95rem;
    font-weight: 500;
}

.about-image {
    position: relative;
}

.image-placeholder {
    background: var(--bg-light);
    border-radius: 16px;
    padding: 3rem;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.tech-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 1.25rem;
    border: 2px solid var(--border-color);
}

/* Services Section */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 700;
}

.service-card p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--text-medium);
    position: relative;
    padding-left: 1.5rem;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* AI Showcase Section */
.ai-showcase {
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.ai-showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.ai-feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.ai-feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.ai-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.ai-feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 1rem;
}

.ai-feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.ai-feature-card p {
    color: var(--text-medium);
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.ai-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-light);
    border-radius: 3px;
    overflow: hidden;
}

.ai-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    animation: progressFill 2s ease-out;
}

@keyframes progressFill {
    from {
        width: 0%;
    }
}

.ai-visualization {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-network {
    position: relative;
    width: 100%;
    height: 100%;
}

.ai-node {
    position: absolute;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    animation: pulseNode 2s ease-in-out infinite;
}

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

.node-2 {
    top: 10%;
    right: 20%;
    animation-delay: 0.5s;
}

.node-3 {
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    animation-delay: 1s;
}

.node-4 {
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    animation-delay: 1.5s;
}

.node-5 {
    bottom: 10%;
    left: 30%;
    animation-delay: 0.25s;
}

.node-6 {
    bottom: 10%;
    right: 30%;
    animation-delay: 0.75s;
}

@keyframes pulseNode {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.ai-connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
    opacity: 0.3;
    animation: connectionPulse 3s ease-in-out infinite;
}

.conn-1 {
    top: 25%;
    left: 35%;
    width: 30%;
    transform: rotate(15deg);
    animation-delay: 0s;
}

.conn-2 {
    top: 25%;
    right: 35%;
    width: 30%;
    transform: rotate(-15deg);
    animation-delay: 0.5s;
}

.conn-3 {
    top: 50%;
    left: 25%;
    width: 50%;
    transform: translateY(-50%) rotate(0deg);
    animation-delay: 1s;
}

.conn-4 {
    bottom: 25%;
    left: 40%;
    width: 20%;
    transform: rotate(-10deg);
    animation-delay: 1.5s;
}

.conn-5 {
    bottom: 25%;
    right: 40%;
    width: 20%;
    transform: rotate(10deg);
    animation-delay: 2s;
}

@keyframes connectionPulse {
    0%, 100% {
        opacity: 0.2;
    }
    50% {
        opacity: 0.5;
    }
}

/* Solutions Section */
.solutions {
    background: var(--bg-white);
}

.solutions-content {
    display: grid;
    gap: 1.5rem;
}

.solution-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 2rem;
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.solution-item:hover {
    background: white;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transform: translateX(8px);
}

.solution-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.solution-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.solution-content p {
    color: var(--text-medium);
    line-height: 1.8;
}

/* Contact Section */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.info-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 12px;
    flex-shrink: 0;
}

.info-details h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.info-details a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.info-details a:hover {
    color: var(--primary-dark);
}

.info-details p {
    color: var(--text-medium);
}

.contact-form-wrapper {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: white;
    font-weight: 800;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Chat Widgets (Telegram & WhatsApp) */
.chat-widgets {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-widget {
    position: relative;
}

.chat-widget-button {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.telegram-button {
    background: #0088cc;
    box-shadow: 0 4px 20px rgba(0, 136, 204, 0.4);
}

.telegram-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(0, 136, 204, 0.5);
}

.whatsapp-button {
    background: #25d366;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
}

.whatsapp-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

.chat-widget-popup {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 320px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.chat-widget-popup.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.chat-widget-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-light);
    border-radius: 16px 16px 0 0;
}

.chat-widget-header h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.chat-widget-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-medium);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.chat-widget-close:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

.chat-widget-content {
    padding: 1.5rem;
}

.chat-widget-content p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.chat-link {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    width: 100%;
}

.chat-link svg {
    flex-shrink: 0;
}

.whatsapp-link {
    background: #25d366;
}

.whatsapp-link:hover {
    background: #20ba5a;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-visual {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 92px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .desktop-lang-switcher {
        display: none;
    }

    .mobile-lang-switcher {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .logo-img {
        height: 48px;
    }

    .logo-text {
        font-size: 1.5rem;
    }
    
    .nav-wrapper {
        min-height: 80px;
        padding: 0.75rem 0;
    }
    
    .nav-menu {
        top: 80px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .solution-item {
        grid-template-columns: 1fr;
    }

    .solution-number {
        font-size: 2rem;
    }

    .code-editor-container {
        max-width: 100%;
        margin-bottom: 1rem;
    }

    .code-editor-body {
        font-size: 0.75rem;
        padding: 1rem;
        min-height: 150px;
    }

    .ai-showcase-content {
        grid-template-columns: 1fr;
    }

    .ai-feature-grid {
        grid-template-columns: 1fr;
    }

    .ai-visualization {
        height: 300px;
        margin-top: 2rem;
    }

    .chat-widgets {
        bottom: 16px;
        right: 16px;
        gap: 0.75rem;
    }

    .chat-widget-button {
        width: 56px;
        height: 56px;
    }

    .chat-widget-popup {
        width: calc(100vw - 32px);
        max-width: 320px;
        right: 0;
    }
}