/**
 * JTSC Pro - Clean & Optimized CSS
 * Modern Vietnamese Business Website
 * Version 3.0 - Ultra Clean
 */

/* CSS Custom Properties - Vietnamese Optimized */
:root {
  /* Color System */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --secondary: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  
  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  /* Borders & Shadows */
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
  --shadow-lg: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  
  /* Typography - Vietnamese Optimized */
  --font-family: 'Be Vietnam Pro', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  
  --border: #334155;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4);
  --shadow-lg: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 10px 15px -3px rgb(0 0 0 / 0.4);
}

/* Enhanced Dark Mode Styles */
[data-theme="dark"] .service-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}

[data-theme="dark"] .about {
  background: var(--bg-primary);
}

[data-theme="dark"] .services {
  background: var(--bg-secondary);
}

[data-theme="dark"] .news {
  background: var(--bg-primary);
}

[data-theme="dark"] .news-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}

[data-theme="dark"] .contact {
  background: 
    linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%),
    url('../images/contact-bg.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-primary);
}

[data-theme="dark"] .contact .section-title {
  color: var(--text-primary);
}

[data-theme="dark"] .contact .section-title::after {
  background: var(--primary);
}

[data-theme="dark"] .contact .section-subtitle {
  color: var(--text-secondary);
}

[data-theme="dark"] .contact-form {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
}

[data-theme="dark"] .contact-form input,
[data-theme="dark"] .contact-form textarea {
  background: var(--bg-tertiary);
  border-color: var(--border);
  color: var(--text-primary);
}

[data-theme="dark"] .contact-form input:focus,
[data-theme="dark"] .contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .contact-form input::placeholder,
[data-theme="dark"] .contact-form textarea::placeholder {
  color: var(--text-muted);
}

[data-theme="dark"] .contact-form label {
  color: var(--text-primary);
}

[data-theme="dark"] .contact-details {
  color: var(--text-secondary);
}

[data-theme="dark"] .contact-details h3 {
  color: var(--text-primary);
}

[data-theme="dark"] .stat-item {
  background: var(--bg-secondary);
  border-color: var(--border);
}

[data-theme="dark"] .social-links a {
  background: var(--bg-tertiary);
  border-color: var(--border);
}

[data-theme="dark"] .social-links a:hover {
  background: var(--primary);
}

[data-theme="dark"] input,
[data-theme="dark"] textarea {
  background: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
  border-color: var(--border) !important;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  background: var(--bg-tertiary) !important;
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
  color: var(--text-muted) !important;
}

[data-theme="dark"] label {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .form-group label {
  color: var(--text-primary) !important;
}

/* Footer Dark Mode */
[data-theme="dark"] .footer {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

[data-theme="dark"] .footer-section h3 {
  color: var(--text-primary);
}

[data-theme="dark"] .footer-section a {
  color: var(--text-secondary);
}

[data-theme="dark"] .footer-section a:hover {
  color: var(--text-primary);
}

[data-theme="dark"] .footer-bottom {
  border-top-color: var(--border);
  color: var(--text-muted);
}

[data-theme="dark"] .social-links a {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

[data-theme="dark"] .social-links a:hover {
  background: var(--primary);
  color: white;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: var(--transition);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: var(--primary);
  color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.95);
}

/* Fix logo position in dark mode */
[data-theme="dark"] .nav-container {
 display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
  padding: 0 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

[data-theme="dark"] .nav-logo {
  margin-right: 0;
  margin-left: 0;
  flex-shrink: 0;
}

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

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
  padding: 0 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  transition: var(--transition);
  flex-shrink: 0;
}

.nav-logo:hover {
  transform: scale(1.02);
}

.logo-img {
  width: 95px;
  height: 95px;
  object-fit: contain;
}

.logo-text {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

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

.nav-link::before {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

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

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  color: var(--primary);
  transform: scale(1.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: 
    linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%),
    url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.1);
  opacity: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content {
  animation: slideUp 0.8s ease-out;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, #ff6b35 0%, #f7931e 25%, #00c3ff 50%, #24eb6d 75%, #8b5cf6 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientMove 4s ease-in-out infinite;
}

@keyframes gradientMove {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
  opacity: 0.9;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: slideUp 0.8s ease-out 0.2s both;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(60px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

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

.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

/* Section */
.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -var(--space-2);
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

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

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

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

.about-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.about-info p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

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

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.service-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  background: var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: white;
  margin-bottom: var(--space-6);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.service-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.service-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.service-features i {
  color: var(--success);
  font-size: var(--font-size-sm);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

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

/* News Section */
.news {
  background: var(--bg-secondary);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.news-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

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

.news-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.news-card:hover .news-image img {
  transform: scale(1.05);
}

.news-category {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--primary);
  color: white;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.news-content {
  padding: var(--space-6);
}

.news-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-excerpt {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.news-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Contact Section */
.contact {
  background: 
    linear-gradient(135deg, rgba(25, 40, 66, 0.9) 0%, rgba(147, 51, 234, 0.9) 100%),
    url('../images/contact-bg.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: white;
  position: relative;
}

.contact .section-title {
  color: white;
}

.contact .section-title::after {
  background: white;
}

.contact .section-subtitle {
  color: rgba(255, 255, 255, 0.9);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  color: white;
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-details p {
  color: rgba(255, 255, 255, 0.9);
}

.contact-form {
  background: rgba(255, 255, 255, 0.95);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.15);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.contact-form .btn-primary {
  background: linear-gradient(135deg, #FF6B6B, #4ECDC4);
  border: none;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
}

.contact-form .btn-primary:hover {
  background: linear-gradient(135deg, #FF5252, #26C6DA);
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(255, 107, 107, 0.4);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.8);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-section h3 {
  color: white;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-logo img {
  width: 50px;
  height: 50px;
}

.footer-section p {
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

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

.footer-section li {
  margin-bottom: var(--space-2);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
}

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

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-links a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

.footer-bottom {
  padding: var(--space-6) 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

/* Chatbot */
.chatbot-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 60px;
  height: 60px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  z-index: 999;
}

.chatbot-fab:hover {
  transform: scale(1.1);
}

.chatbot {
  position: fixed;
  bottom: 90px;
  right: var(--space-6);
  width: 350px;
  height: 500px;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transform: translateY(20px) scale(0.95);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.chatbot.show {
  transform: translateY(0) scale(1);
  opacity: 1;
  visibility: visible;
}

[data-theme="dark"] .chatbot {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.chatbot-header {
  background: var(--primary);
  color: white;
  padding: var(--space-4);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

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

.chatbot-info h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.chatbot-status {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.chatbot-toggle {
  margin-left: auto;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius);
  transition: var(--transition);
}

.chatbot-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.chatbot-messages {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.message {
  display: flex;
  gap: var(--space-2);
}

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

.message-avatar {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.user-message .message-avatar {
  background: var(--secondary);
}

.message-content {
  max-width: 80%;
  background: var(--bg-tertiary);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

.user-message .message-content {
  background: var(--primary);
  color: white;
}

.message-content p {
  margin: 0;
  line-height: 1.4;
}

.chatbot-input {
  padding: var(--space-4);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space-2);
}

.chatbot-input input {
  flex: 1;
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: var(--transition);
}

.chatbot-input input:focus {
  outline: none;
  border-color: var(--primary);
}

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

.chatbot-input button:hover {
  transform: scale(1.05);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  left: var(--space-6);
  width: 50px;
  height: 50px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 998;
  box-shadow: var(--shadow-lg);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: white;
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: var(--transition);
}

.modal.show .modal-content {
  transform: scale(1);
}

[data-theme="dark"] .modal-content {
  background: var(--bg-secondary);
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: var(--font-size-lg);
  padding: var(--space-2);
  border-radius: var(--radius);
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
}

/* Notification System */
.notification {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  min-width: 300px;
  transform: translateX(100%);
  opacity: 0;
  transition: var(--transition);
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-success {
  border-left: 4px solid var(--success);
}

.notification-error {
  border-left: 4px solid var(--danger);
}

.notification-info {
  border-left: 4px solid var(--primary);
}

.notification-warning {
  border-left: 4px solid var(--warning);
}

.notification-icon {
  font-size: var(--font-size-lg);
}

.notification-success .notification-icon {
  color: var(--success);
}

.notification-error .notification-icon {
  color: var(--danger);
}

.notification-info .notification-icon {
  color: var(--primary);
}

.notification-warning .notification-icon {
  color: var(--warning);
}

.notification-content {
  flex: 1;
  font-weight: 500;
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius);
  transition: var(--transition);
}

.notification-close:hover {
  color: var(--text-primary);
}

/* Field Error */
.field-error {
  color: var(--danger);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--danger);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .services-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  /* Fix logo alignment in mobile */
  .nav-container {
    justify-content: space-between !important;
    padding: 0 0.5rem !important;
    height: 90px !important;
  }
  
  .nav-logo {
    margin-right: 0 !important;
    margin-left: 0 !important;
    flex-shrink: 0 !important;
  }
  
  .logo-img {
    width: 90px !important;
    height: 90px !important;
  }
  
  .logo-text {
    font-size: var(--font-size-xl) !important;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-lg {
    width: 100%;
    max-width: 300px;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .chatbot {
    width: calc(100vw - 2rem);
    right: var(--space-4);
    left: var(--space-4);
  }
  
  .chatbot-fab {
    bottom: var(--space-4);
    right: var(--space-4);
  }
  
  .back-to-top {
    bottom: var(--space-4);
    left: var(--space-4);
  }
}

@media (max-width: 640px) {
  .section {
    padding: var(--space-12) 0;
  }
  
  .hero {
    min-height: 80vh;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .about-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
  
  .contact-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
  
  .contact-form {
    padding: var(--space-6);
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-2 { margin-top: var(--space-2) !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }

/* Print Styles */
@media print {
  .navbar,
  .chatbot,
  .chatbot-fab,
  .back-to-top,
  .notification {
    display: none !important;
  }
  
  .hero {
    min-height: 300px;
    padding: var(--space-8) 0;
  }
  
  * {
    box-shadow: none !important;
  }
}