/* ===================================
   Data Solution & System - Main Stylesheet
   Modern, Responsive Design
   =================================== */

/* ===================================
   1. ROOT VARIABLES & RESET
   =================================== */
:root {
    /* Colors */
    --primary-color: #0066cc;
    --primary-dark: #004c99;
    --primary-light: #3385db;
    --secondary-color: #00a86b;
    --accent-color: #ff6b35;
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-light: #6a6a6a;
    --text-white: #ffffff;
    
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;
    --bg-dark: #212529;
    
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ===================================
   2. TYPOGRAPHY
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.lead {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--text-light);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* ===================================
   3. LAYOUT
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.main-content {
    min-height: calc(100vh - 80px);
}

/* ===================================
   4. NAVIGATION
   =================================== */
.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    min-height: 120px;
}

.navbar-brand .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    height: 95%;
}

.logo-img {
    height: 110px;
    width: auto;
    max-width: 400px;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.logo-img:hover {
    transform: scale(1.05);
}

.logo-text-wrapper {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 400;
    line-height: 1.2;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Language Toggle Button */
.language-toggle {
    margin-left: var(--spacing-sm);
}

.lang-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lang-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.lang-btn:active {
    transform: translateY(0);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: all var(--transition-normal);
}

/* ===================================
   5. BUTTONS
   =================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    text-decoration: none;
    font-family: var(--font-primary);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-outline:hover {
    background-color: var(--bg-light);
    border-color: var(--text-primary);
}

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

.btn-secondary:hover {
    background-color: #008c58;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ===================================
   6. HERO SECTION
   =================================== */
.hero-section {
    background: linear-gradient(135deg, #0066cc 0%, #004c99 100%);
    color: var(--text-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)" /></svg>');
    opacity: 0.3;
}

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

.hero-section h1 {
    font-size: 3rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-section p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.95);
    margin-bottom: var(--spacing-md);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   7. PAGE HEADER
   =================================== */
.page-header {
    background: linear-gradient(135deg, #0066cc 0%, #004c99 100%);
    color: var(--text-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.page-header h1 {
    color: var(--text-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.page-header .lead {
    color: rgba(255,255,255,0.9);
    font-size: 1.125rem;
}

/* ===================================
   8. FEATURES & CARDS
   =================================== */
.features-section,
.about-section,
.services-section,
.contact-section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.features-grid,
.expertise-grid,
.values-grid,
.services-grid,
.quick-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature-card,
.expertise-card,
.value-card,
.service-card,
.quick-info-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover,
.expertise-card:hover,
.value-card:hover,
.service-card:hover,
.quick-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon,
.value-icon,
.quick-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3,
.expertise-card h3,
.value-card h3,
.service-card h3,
.quick-info-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-card p,
.expertise-card p,
.value-card p,
.service-card p,
.quick-info-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-card ul {
    text-align: left;
    list-style: none;
    padding-left: 0;
    margin-top: var(--spacing-sm);
}

.service-card ul li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

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

/* Service Block Styles */
.service-block {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.service-block:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-block .service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-block h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.service-block p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.service-features {
    list-style: none;
    padding-left: 0;
    margin-top: var(--spacing-md);
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 2rem;
    line-height: 1.6;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ===================================
   9. STATS SECTION
   =================================== */
.stats-section {
    background-color: var(--bg-light);
    padding: var(--spacing-lg) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    text-align: center;
}

.stat-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===================================
   10. CONTENT BLOCKS
   =================================== */
.content-block {
    margin-bottom: var(--spacing-lg);
}

.content-block h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.intro-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.highlight-block {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.promise-block {
    background: linear-gradient(135deg, #0066cc 0%, #004c99 100%);
    color: var(--text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    text-align: center;
}

.promise-block h2 {
    color: var(--text-white);
}

.company-quote {
    font-size: 1.5rem;
    font-weight: 600;
    font-style: italic;
    margin: var(--spacing-md) 0;
    color: var(--text-white);
}

.emphasis-text {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.95);
}

.advantage-list {
    list-style: none;
    padding-left: 0;
}

.advantage-list li {
    padding: var(--spacing-sm) 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
}

.advantage-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.25rem;
}

.highlight-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

/* ===================================
   11. TIMELINE
   =================================== */
.timeline-section {
    background-color: var(--bg-light);
    padding: var(--spacing-xl) 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: var(--spacing-md) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    flex: 0 0 100px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    padding: var(--spacing-sm);
}

.timeline-content {
    flex: 1;
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin: 0 var(--spacing-md);
}

/* ===================================
   12. TECHNOLOGY STACK
   =================================== */
.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.tech-item {
    background-color: var(--bg-light);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.tech-item:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-3px);
}

/* ===================================
   13. CTA SECTIONS
   =================================== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.cta-content h2 {
    color: var(--text-white);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    color: rgba(255,255,255,0.9);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

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

.cta-section .btn:hover {
    background-color: var(--bg-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* ===================================
   14. CONTACT FORM & INFO
   =================================== */
.contact-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info h2,
.contact-form-wrapper h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.info-block {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.info-content h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.info-content p,
.info-content a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.why-contact-box {
    background-color: var(--primary-color);
    color: var(--text-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
}

.why-contact-box h3 {
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.why-contact-box ul {
    list-style: none;
    padding-left: 0;
}

.why-contact-box ul li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    color: rgba(255,255,255,0.95);
}

.why-contact-box ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--text-white);
    font-weight: bold;
}

.contact-form-wrapper {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form .form-group {
    margin-bottom: var(--spacing-md);
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.required {
    color: #dc3545;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.form-note {
    margin-top: var(--spacing-sm);
    color: var(--text-light);
    font-size: 0.875rem;
}

.alert {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert ul {
    margin: 0;
    padding-left: var(--spacing-md);
}

.quick-info-section {
    background-color: var(--bg-white);
    padding: var(--spacing-xl) 0;
}

/* ===================================
   15. FOOTER
   =================================== */
.footer {
    background-color: var(--bg-dark);
    color: rgba(255,255,255,0.8);
    padding: calc(var(--spacing-xl) * 0.5) 0 calc(var(--spacing-md) * 0.5);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-lg) * 0.6);
    margin-bottom: calc(var(--spacing-lg) * 0.5);
}

.footer-title {
    color: var(--text-white);
    font-size: 1rem;
    margin-bottom: calc(var(--spacing-md) * 0.5);
}

.footer-description {
    color: rgba(255,255,255,0.7);
    font-size: 0.85rem;
    line-height: 1.4;
}

.footer-badges {
    display: flex;
    gap: calc(var(--spacing-sm) * 0.5);
    margin-top: calc(var(--spacing-md) * 0.5);
    flex-wrap: wrap;
}

.badge {
    background-color: rgba(255,255,255,0.1);
    padding: calc(var(--spacing-xs) * 0.5) calc(var(--spacing-sm) * 0.7);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-xs) * 0.5);
    font-size: 0.8rem;
}

.footer-links {
    list-style: none;
    padding-left: 0;
}

.footer-links li {
    margin-bottom: calc(var(--spacing-xs) * 0.5);
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    transition: color var(--transition-fast);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text-white);
}

.footer-contact {
    list-style: none;
    padding-left: 0;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: calc(var(--spacing-xs) * 0.5);
    margin-bottom: calc(var(--spacing-sm) * 0.6);
    color: rgba(255,255,255,0.7);
    font-size: 0.85rem;
}

.contact-icon {
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: calc(var(--spacing-md) * 0.5);
    margin-top: calc(var(--spacing-lg) * 0.5);
}

.footer-bottom-content {
    text-align: center;
}

.copyright,
.powered-by {
    color: rgba(255,255,255,0.6);
    font-size: 0.8rem;
    margin-bottom: calc(var(--spacing-xs) * 0.5);
}

.footer-technologies {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-sm) * 0.6);
    flex-wrap: wrap;
    margin: calc(var(--spacing-sm) * 0.5) 0;
}

.tech-badge {
    background-color: rgba(255,255,255,0.1);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    color: rgba(255,255,255,0.8);
}

/* ===================================
   16. BACK TO TOP BUTTON
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* ===================================
   17. RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-lg: 2rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .logo-img {
        height: 70px;
        max-width: 280px;
    }
    
    .navbar .container {
        flex-wrap: wrap;
        min-height: 90px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm) 0;
        align-items: stretch;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm);
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .features-grid,
    .expertise-grid,
    .values-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 60px;
    }
    
    .timeline-year {
        position: absolute;
        left: 0;
        flex: 0 0 60px;
        font-size: 1rem;
    }
    
    .timeline-content {
        margin-left: 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 1rem;
        right: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   18. ANIMATIONS
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===================================
   20. ARCHITECTURE SECTION
   =================================== */
.architecture-section {
    background: var(--light-bg);
    padding: var(--spacing-xl) 0;
}

.architecture-diagram {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.architecture-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: white;
    padding: var(--spacing-md);
}

@media (max-width: 768px) {
    .architecture-img {
        padding: var(--spacing-sm);
    }
}

.architecture-placeholder {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-content h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.placeholder-content p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.feature-icon, .value-icon, .quick-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

/* Hide broken icon classes */
.feature-icon i,
.value-icon i,
.quick-icon i {
    display: none;
}

/* ===================================
   19. UTILITY CLASSES
   =================================== */
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }

.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }

/* ===================================
   21. SLIDESHOW SECTION
   =================================== */
.slideshow-section {
    width: 100%;
    background: #000;
    position: relative;
}

.slideshow-container {
    max-width: 100%;
    position: relative;
    margin: auto;
    background: #000;
}

.slide {
    display: none;
    position: relative;
    width: 100%;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 600px;
    object-fit: contain;
    background: #000;
}

.slide-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    text-align: center;
    max-width: 90%;
    backdrop-filter: blur(10px);
}

/* Navigation arrows */
.prev, .next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: auto;
    padding: 16px;
    color: white;
    font-weight: bold;
    font-size: 24px;
    transition: 0.3s ease;
    border-radius: var(--radius-sm);
    user-select: none;
    background: rgba(0, 0, 0, 0.5);
    z-index: 10;
}

.next {
    right: 10px;
}

.prev {
    left: 10px;
}

.prev:hover, .next:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

/* Slide dots */
.slide-dots {
    text-align: center;
    padding: 20px 0;
    background: #000;
}

.dot {
    cursor: pointer;
    height: 15px;
    width: 15px;
    margin: 0 5px;
    background-color: #717171;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.3s ease;
}

.dot.active, .dot:hover {
    background-color: var(--primary-color);
}

/* Fading animation */
.fade {
    animation-name: fade;
    animation-duration: 1s;
}

@keyframes fade {
    from {opacity: 0.4}
    to {opacity: 1}
}

/* Responsive Design */
@media (max-width: 768px) {
    .slide img {
        max-height: 400px;
    }
    
    .slide-caption {
        font-size: 0.875rem;
        padding: 10px 20px;
        bottom: 10px;
    }
    
    .prev, .next {
        padding: 12px;
        font-size: 18px;
    }
    
    .dot {
        height: 12px;
        width: 12px;
        margin: 0 3px;
    }
}

@media (max-width: 480px) {
    .slide img {
        max-height: 300px;
    }
    
    .slide-caption {
        font-size: 0.75rem;
        padding: 8px 15px;
    }
}

/* ===================================
   END OF STYLESHEET
   =================================== */