/* ===== CSS VARIABLES ===== */
:root {
  /* Primary Color Scheme - Complementary */
  --primary-color: #FF6B35;
  --primary-light: #FF8659;
  --primary-dark: #E5522B;
  --complementary-color: #35A0FF;
  --complementary-light: #59B3FF;
  --complementary-dark: #2B8AE5;
  
  /* Secondary Colors */
  --secondary-color: #2C3E50;
  --secondary-light: #34495E;
  --secondary-dark: #1A252F;
  --accent-color: #F39C12;
  --accent-light: #F5B041;
  --accent-dark: #D68910;
  
  /* Neutral Colors */
  --white: #FFFFFF;
  --light-gray: #F8F9FA;
  --gray: #6C757D;
  --dark-gray: #343A40;
  --black: #000000;
  
  /* Text Colors */
  --text-primary: #2C3E50;
  --text-secondary: #6C757D;
  --text-light: #FFFFFF;
  --text-dark: #1A252F;
  
  /* Background Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-dark: #2C3E50;
  --bg-gradient: linear-gradient(135deg, var(--primary-color), var(--complementary-color));
  --bg-overlay: linear-gradient(rgba(44, 62, 80, 0.7), rgba(44, 62, 80, 0.5));
  
  /* Neumorphism Shadows */
  --shadow-light: 8px 8px 16px rgba(163, 177, 198, 0.6), -8px -8px 16px rgba(255, 255, 255, 0.8);
  --shadow-dark: inset 8px 8px 16px rgba(163, 177, 198, 0.6), inset -8px -8px 16px rgba(255, 255, 255, 0.8);
  --shadow-hover: 12px 12px 24px rgba(163, 177, 198, 0.8), -12px -12px 24px rgba(255, 255, 255, 0.9);
  --shadow-card: 6px 6px 12px rgba(163, 177, 198, 0.4), -6px -6px 12px rgba(255, 255, 255, 0.6);
  
  /* Typography */
  --font-heading: 'Archivo Black', sans-serif;
  --font-body: 'Roboto', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  
  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-header: 1000;
  --z-overlay: 100;
  --z-card: 10;
  --z-base: 1;
}

/* ===== RESET AND BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

ul {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-md);
}

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

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

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
  line-height: 1.7;
}

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

.main-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 150px;
  text-align: center;
  box-shadow: var(--shadow-light);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: var(--transition-slow);
}

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

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

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-dark);
}

.btn-primary {
  background: var(--bg-gradient);
  color: var(--text-light);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
  background: var(--secondary-color);
  color: var(--text-light);
  box-shadow: 0 8px 24px rgba(44, 62, 80, 0.3);
}

.btn-secondary:hover {
  background: var(--secondary-light);
  box-shadow: 0 12px 32px rgba(44, 62, 80, 0.4);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  z-index: var(--z-header);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-card);
}

.navbar {
  padding: var(--spacing-sm) 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.nav-logo h2 {
  color: var(--primary-color);
  margin: 0;
  font-size: 1.5rem;
  font-family: var(--font-heading);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transform: translateX(-50%);
  transition: var(--transition-normal);
}

.nav-link:hover {
  color: var(--primary-color);
  background: rgba(255, 107, 53, 0.1);
}

.nav-link:hover::after {
  width: 80%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition-normal);
  border-radius: 2px;
}

/* ===== HERO SECTION ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  z-index: var(--z-base);
}

.hero-content {
  position: relative;
  z-index: var(--z-overlay);
  text-align: center;
  color: var(--text-light);
  padding: var(--spacing-xl) 0;
}

.hero-title {
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-light);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

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

/* ===== SECTIONS ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

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

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ===== MISSION SECTION ===== */
.mission-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-secondary);
}

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

.mission-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

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

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

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

.card-content {
  padding: var(--spacing-lg);
  text-align: center;
}

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

/* ===== VISION SECTION ===== */
.vision-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-primary);
}

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

.vision-text h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.vision-image {
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vision-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
  margin: 0 auto;
}

.vision-image:hover img {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* ===== INSTRUCTORS SECTION ===== */
.instructors-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-secondary);
}

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

.instructor-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-normal);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.image-container {
  width: 100%;
  height: 280px;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.instructor-specialty {
  color: var(--primary-color);
  font-weight: 500;
  font-style: italic;
  margin-bottom: var(--spacing-sm);
}

/* ===== RESEARCH SECTION ===== */
.research-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-primary);
}

.research-areas {
  display: grid;
  gap: var(--spacing-lg);
}

.research-area {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
}

.research-area:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.area-header h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

/* ===== PROJECTS SECTION ===== */
.projects-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-secondary);
}

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

.project-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

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

/* ===== TEAM SECTION ===== */
.team-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-primary);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.team-member {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-normal);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.team-member:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.team-role {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

/* ===== MEDIA SECTION ===== */
.media-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-secondary);
}

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

.media-item {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.media-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.media-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.media-info {
  padding: var(--spacing-lg);
  text-align: center;
}

.media-info h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

/* ===== EXTERNAL RESOURCES SECTION ===== */
.external-resources-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-primary);
}

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

.resource-item {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.resource-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

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

.resource-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--complementary-color);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--complementary-color);
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
  margin-top: var(--spacing-sm);
}

.resource-link:hover {
  background: var(--complementary-color);
  color: var(--text-light);
  transform: translateY(-2px);
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  padding: var(--spacing-xxl) 0;
  background: var(--bg-secondary);
}

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

.contact-form-container {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

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

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-sm);
  border: 2px solid rgba(108, 117, 125, 0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition-normal);
  background: var(--bg-primary);
  box-shadow: inset 2px 2px 4px rgba(163, 177, 198, 0.2);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: inset 2px 2px 4px rgba(163, 177, 198, 0.2), 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

.contact-item {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
  text-align: center;
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

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

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: var(--spacing-xl) 0 var(--spacing-md) 0;
}

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

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

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links a {
  color: var(--text-light);
  transition: var(--transition-normal);
  padding: var(--spacing-xs) 0;
}

.footer-links a:hover {
  color: var(--primary-color);
  transform: translateX(4px);
}

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

.social-links a {
  color: var(--text-light);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
  text-align: center;
  min-width: 80px;
}

.social-links a:hover {
  background: var(--primary-color);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--secondary-light);
  color: var(--text-secondary);
}

/* ===== SUCCESS PAGE ===== */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  padding: var(--spacing-md);
}

.success-content {
  text-align: center;
  background: var(--bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  max-width: 500px;
  width: 100%;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 2rem;
  color: var(--text-light);
}

/* ===== PRIVACY AND TERMS PAGES ===== */
.privacy-page,
.terms-page {
  padding-top: 120px;
  padding-bottom: var(--spacing-xxl);
  background: var(--bg-primary);
  min-height: 100vh;
}

.privacy-content,
.terms-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.privacy-content h1,
.terms-content h1 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.privacy-content h2,
.terms-content h2 {
  color: var(--secondary-color);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.privacy-content p,
.terms-content p {
  margin-bottom: var(--spacing-md);
  text-align: justify;
}

.privacy-content ul,
.terms-content ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-md);
}

.privacy-content li,
.terms-content li {
  list-style: disc;
  margin-bottom: var(--spacing-xs);
}

/* ===== READ MORE LINKS ===== */
.read-more {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition-normal);
  margin-top: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-sm);
}

.read-more:hover {
  background: var(--primary-color);
  color: var(--text-light);
  transform: translateX(4px);
}

.read-more::after {
  content: '→';
  margin-left: var(--spacing-xs);
  transition: var(--transition-normal);
}

.read-more:hover::after {
  transform: translateX(4px);
}

/* ===== SCROLL-DEPENDENT ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-slide-left {
  opacity: 0;
  animation: slideInLeft 0.8s ease-out forwards;
}

.animate-slide-right {
  opacity: 0;
  animation: slideInRight 0.8s ease-out forwards;
}

/* ===== PARALLAX EFFECTS ===== */
.parallax {
  transform: translateZ(0);
  will-change: transform;
}

/* ===== GLASSMORPHISM EFFECTS ===== */
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: start;
    align-items: center;
    transition: var(--transition-normal);
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }

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

  .nav-toggle {
    display: flex;
  }

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

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

  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

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

  .vision-grid,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .vision-image {
    order: -1;
  }

  .mission-grid,
  .instructors-grid,
  .projects-grid,
  .team-grid,
  .media-grid,
  .resources-grid {
    grid-template-columns: 1fr;
  }

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

  .container {
    padding: 0 var(--spacing-sm);
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: var(--spacing-md) 0;
  }

  .btn {
    min-width: 120px;
    font-size: 0.9rem;
  }

  .section-header {
    margin-bottom: var(--spacing-lg);
  }

  .mission-section,
  .vision-section,
  .instructors-section,
  .research-section,
  .projects-section,
  .team-section,
  .media-section,
  .external-resources-section,
  .contact-section {
    padding: var(--spacing-lg) 0;
  }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
.card-image,
.image-container,
.media-image {
  contain: layout style paint;
}

.btn,
.nav-link,
.card,
.team-member,
.project-card,
.instructor-card {
  will-change: transform;
}

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

.btn:focus,
.nav-link:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ===== LOADING STATES ===== */
.loading {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.loaded {
  opacity: 1;
}

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

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

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

.mb-0 {
  margin-bottom: 0;
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

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

.mt-0 {
  margin-top: 0;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

.flex {
  display: flex;
}

.flex-column {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

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

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}