/* CSS Variables for Design System */
:root {
  /* Primary Colors (Complementary Color Scheme) */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-secondary: #f97316;
  --color-secondary-dark: #ea580c;
  --color-secondary-light: #fb923c;
  
  /* Complementary Accent Colors */
  --color-accent: #8b5cf6;
  --color-accent-dark: #7c3aed;
  --color-accent-light: #a78bfa;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-dark: #1f2937;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Dynamic Gradient Backgrounds */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  --gradient-hero: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-secondary) 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(37, 99, 235, 0.8) 0%, rgba(139, 92, 246, 0.8) 100%);
  
  /* Typography */
  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Nunito', 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;
  --font-size-5xl: 3rem;
  --font-size-6xl: 4rem;
  
  /* 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;
  --spacing-4xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --header-height: 80px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-dark);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin: 0 0 var(--spacing-md) 0;
  line-height: 1.7;
}

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

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

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

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Global Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 120px;
  text-align: center;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

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

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

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

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

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

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

button, input[type='submit'] {
  font-family: var(--font-body);
  cursor: pointer;
}

/* Animated Button */
.animated-btn {
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.animated-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
  z-index: -1;
}

.animated-btn:hover::after {
  width: 300px;
  height: 300px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand h1 {
  margin: 0;
  font-size: var(--font-size-2xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  font-weight: 500;
  color: var(--color-gray-700);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

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

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

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

.bar {
  width: 25px;
  height: 3px;
  background: var(--color-gray-700);
  transition: all var(--transition-normal);
  border-radius: 2px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-overlay);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.95;
  line-height: 1.6;
  color: var(--color-white);
}

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

/* Section Styles */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  font-size: var(--font-size-4xl);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-description {
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Common Section Padding */
section {
  padding: var(--spacing-4xl) 0;
}

/* Portfolio Section */
.portfolio {
  background: var(--color-gray-100);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.portfolio-item {
  opacity: 0;
  transform: translateY(50px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.portfolio-item:nth-child(2) {
  animation-delay: 0.2s;
}

.portfolio-item:nth-child(3) {
  animation-delay: 0.4s;
}

.card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  margin: 0 auto;
}

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

.card-content {
  padding: var(--spacing-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: center;
}

.card-content h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-dark);
}

.card-content p {
  flex: 1;
  margin-bottom: var(--spacing-lg);
  color: var(--color-gray-600);
  line-height: 1.6;
}

.project-tag {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: auto;
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.carousel-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.1);
}

/* Testimonials Section */
.testimonials {
  background: var(--gradient-hero);
  color: var(--color-white);
}

.testimonials .section-title {
  color: var(--color-white);
}

.testimonials-carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-item {
  display: none;
  opacity: 0;
  transform: translateX(50px);
  transition: all var(--transition-slow);
  text-align: center;
}

.testimonial-item.active {
  display: block;
  opacity: 1;
  transform: translateX(0);
}

.testimonial-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.testimonial-image {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  border: 4px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.testimonial-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0 auto;
}

blockquote {
  font-size: var(--font-size-lg);
  font-style: italic;
  margin: 0 0 var(--spacing-lg) 0;
  line-height: 1.8;
  position: relative;
}

blockquote::before {
  content: '"';
  font-size: var(--font-size-5xl);
  position: absolute;
  top: -20px;
  left: -30px;
  opacity: 0.3;
}

cite {
  font-style: normal;
  display: flex;
  flex-direction: column;
  align-items: center;
}

cite strong {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

cite span {
  opacity: 0.8;
  font-size: var(--font-size-sm);
}

/* Resources Section */
.resources {
  background: var(--color-gray-100);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.resource-item .card-content h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

/* Events Section */
.events-calendar {
  max-width: 800px;
  margin: 0 auto;
}

.event-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.event-item:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-md);
}

.event-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  color: var(--color-white);
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.event-date .day {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  line-height: 1;
}

.event-date .month {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.event-content {
  flex: 1;
}

.event-content h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark);
}

.event-content p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-600);
}

.event-location {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* Research Section */
.research {
  background: var(--color-gray-100);
}

.research-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.research-article {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.article-image {
  width: 100%;
  height: 300px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0 auto;
}

.article-content {
  padding: var(--spacing-xl);
  text-align: center;
}

.research-sidebar {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  height: fit-content;
}

.insight-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.insight-item ul {
  list-style: none;
  padding: 0;
}

.insight-item li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-gray-200);
  position: relative;
  padding-left: var(--spacing-lg);
}

.insight-item li:last-child {
  border-bottom: none;
}

.insight-item li::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: var(--font-size-xs);
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-dark);
  transition: all var(--transition-normal);
}

.faq-question:hover {
  background: var(--color-gray-100);
}

.faq-icon {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* Clientele Section */
.clientele {
  background: var(--color-gray-100);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.client-item {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

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

.client-logo {
  width: 150px;
  height: 80px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--border-radius);
}

.client-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  margin: 0 auto;
}

.client-info h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--color-dark);
}

.client-info p {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Contact Section */
.contact {
  background: var(--gradient-hero);
  color: var(--color-white);
}

.contact .section-title {
  color: var(--color-white);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.contact-icon {
  font-size: var(--font-size-2xl);
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.contact-item p {
  margin: 0;
  opacity: 0.9;
}

.contact-form-container {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
}

.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-md);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.2);
}

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

.form-group label {
  position: absolute;
  top: -8px;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0 var(--spacing-sm);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius);
}

.submit-btn {
  background: var(--color-white);
  color: var(--color-primary);
  border: none;
  padding: var(--spacing-lg) var(--spacing-2xl);
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

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

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

.footer-section h3,
.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
}

.footer-section p {
  opacity: 0.8;
  line-height: 1.7;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--color-white);
  padding-left: var(--spacing-sm);
}

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

.social-links a {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.social-links a:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

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

.footer-bottom p {
  margin: 0;
  opacity: 0.7;
  font-size: var(--font-size-sm);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  background: var(--color-white);
  margin: 5% auto;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideIn 0.3s ease-out;
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-dark);
}

.modal-body img {
  width: 100%;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
}

.modal-trigger {
  cursor: pointer;
}

/* Page-specific styles */
.page-success {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-hero);
  color: var(--color-white);
}

.page-content {
  padding-top: 100px;
  padding-bottom: var(--spacing-3xl);
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

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

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.pulse-animation {
  animation: pulse 2s infinite;
}

/* Responsive Design */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 3rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --spacing-4xl: 4rem;
    --spacing-3xl: 3rem;
  }

  .research-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background: var(--color-white);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-2xl);
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

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

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
  }

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

  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .portfolio-grid,
  .resources-grid,
  .clients-grid {
    grid-template-columns: 1fr;
  }

  .event-item {
    flex-direction: column;
    text-align: center;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }

  section {
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    min-width: 100px;
  }

  .hero-buttons {
    gap: var(--spacing-md);
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 250px;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn,
  .nav-toggle,
  .carousel-controls,
  .modal {
    display: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.4;
    color: black;
  }

  .hero {
    background: none !important;
    color: black !important;
    min-height: auto;
    padding: var(--spacing-lg) 0;
  }

  .hero-title,
  .hero-subtitle {
    color: black !important;
  }

  section {
    padding: var(--spacing-lg) 0;
    break-inside: avoid;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #000080;
    --color-secondary: #800000;
    --color-gray-600: #000000;
    --color-gray-700: #000000;
  }

  .btn-outline {
    border-width: 3px;
  }

  .nav-link::after {
    height: 3px;
  }
}

/* Reduced Motion */
@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;
  }

  .hero {
    background-attachment: scroll;
  }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #1f2937;
    --color-dark: #f9fafb;
    --color-gray-100: #374151;
    --color-gray-200: #4b5563;
    --color-gray-800: #f3f4f6;
    --color-gray-900: #ffffff;
  }

  body {
    background-color: var(--color-gray-900);
    color: var(--color-gray-100);
  }

  .header {
    background: rgba(31, 41, 55, 0.95);
    border-bottom-color: var(--color-gray-700);
  }
}