/* ===== Global Styles ===== */
:root {
  --primary: #0a4b7a;
  --primary-dark: #083b5e;
  --secondary: #2c7a5a;
  --accent: #d97706;
  --light: #f8fafc;
  --dark: #1e293b;
  --gray: #64748b;
  --light-gray: #e2e8f0;
  --white: #ffffff;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --border-radius: 8px;
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Lora', serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: var(--font-primary);
  color: var(--dark);
  line-height: 1.6;
  background-color: var(--white);
  overflow-x: hidden;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

.bg-light {
  background-color: var(--light);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.5rem;
  color: var(--dark);
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--gray);
}

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

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  display: inline-block;
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  margin: 1rem auto;
  border-radius: 2px;
}

.section-description {
  max-width: 700px;
  margin: 1.5rem auto 0;
  font-size: 1.1rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

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

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

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

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

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

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  font-family: var(--font-secondary);
}

.logo-dot {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

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

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

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

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--dark);
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  height: 100vh;
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-content {
  text-align: center;
  color: var(--white);
  max-width: 900px;
  padding: 0 2rem;
  z-index: 2;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-family: var(--font-secondary);
}

.hero-title .highlight {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero-scroll a {
  color: var(--white);
  font-size: 1.5rem;
  opacity: 0.8;
  transition: var(--transition);
}

.hero-scroll a:hover {
  opacity: 1;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
  40% { transform: translateY(-20px) translateX(-50%); }
  60% { transform: translateY(-10px) translateX(-50%); }
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content {
  padding-right: 2rem;
}

.about-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-image {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

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

.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: var(--white);
  padding: 1rem;
  font-size: 0.9rem;
  text-align: center;
}

/* ===== Mission Vision Section ===== */
.mission-vision {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
}

.mv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.mv-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
}

.mv-card:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.2);
}

.mv-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.mv-card h3 {
  color: var(--white);
  margin-bottom: 1rem;
}

.mv-card p {
  color: rgba(255, 255, 255, 0.9);
}

.values-list {
  list-style: none;
  text-align: left;
}

.values-list li {
  margin-bottom: 0.5rem;
  color: rgba(255, 255, 255, 0.9);
}

.values-list i {
  color: var(--accent);
  margin-right: 0.5rem;
}

/* ===== Research Section ===== */
.research-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.research-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
  border: 1px solid var(--light-gray);
}

.research-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.research-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.research-icon i {
  font-size: 2rem;
  color: var(--white);
}

.research-card h3 {
  margin-bottom: 1rem;
  color: var(--dark);
}

.research-card p {
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.research-topics {
  list-style: none;
  text-align: left;
  font-size: 0.9rem;
}

.research-topics li {
  padding: 0.25rem 0;
  color: var(--gray);
  position: relative;
  padding-left: 1.2rem;
}

.research-topics li::before {
  content: '•';
  color: var(--accent);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* ===== Conference Section ===== */
.conference-highlight {
  background-color: var(--white);
  padding: 5rem 0;
}

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

.conference-badge {
  display: inline-block;
  background-color: var(--accent);
  color: var(--white);
  padding: 0.25rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

.conference-content h2 {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.conference-content h3 {
  font-size: 1.5rem;
  color: var(--dark);
  margin-bottom: 1.5rem;
}

.conference-details {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.detail-item i {
  color: var(--secondary);
  font-size: 1.2rem;
}

.conference-description {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.conference-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature i {
  color: var(--secondary);
}

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

.conference-buttons .btn-primary {
  background-color: var(--secondary);
}

.conference-buttons .btn-primary:hover {
  background-color: #1f5e46;
}

.conference-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.conference-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

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

/* ===== Global Impact Section ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

.partner-card {
  background: var(--white);
  padding: 2rem 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--light-gray);
}

.partner-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.partner-card p {
  font-weight: 500;
  color: var(--dark);
  margin: 0;
}

.collaboration-text {
  text-align: center;
  max-width: 800px;
  margin: 2rem auto 0;
  font-size: 1.1rem;
  color: var(--gray);
}

/* ===== Contact Section ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.contact-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--light-gray);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.contact-card i {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.contact-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.contact-card p {
  color: var(--gray);
  margin: 0;
}

.contact-card a {
  color: var(--secondary);
  text-decoration: none;
  transition: var(--transition);
}

.contact-card a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.contact-form-container {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

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

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 75, 122, 0.1);
}

.form-row textarea {
  resize: vertical;
}

.form-note {
  font-size: 0.8rem;
  color: var(--gray);
  text-align: center;
  margin-top: 1rem;
}

/* ===== Footer - Updated ===== */
.footer {
  background-color: var(--dark);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr;
  gap: 3rem;
  align-items: start;
}

.footer-about h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-secondary);
  color: var(--white);
}

.footer-about .dot {
  color: var(--accent);
}

.footer-about p {
  color: var(--light-gray);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.footer-mission {
  font-style: italic;
  margin-top: 1rem;
}

.footer-links h4,
.footer-contact h4 {
  color: var(--white);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  font-weight: 600;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--light-gray);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 5px;
}

.footer-contact address {
  font-style: normal;
}

.footer-contact p {
  color: var(--light-gray);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-contact i {
  color: var(--accent);
  width: 20px;
  font-size: 1rem;
}

.footer-contact a {
  color: var(--light-gray);
  text-decoration: none;
  transition: var(--transition);
}

.footer-contact a:hover {
  color: var(--accent);
}

.footer-copyright {
  color: var(--light-gray);
  font-size: 0.85rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
  h2 {
    font-size: 2rem;
  }
  
  .research-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    gap: 0;
    flex-direction: column;
    background-color: var(--white);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-md);
    padding: 2rem 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu li {
    margin: 1rem 0;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .about-grid,
  .conference-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .mv-grid {
    grid-template-columns: 1fr;
  }
  
  .research-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .footer-contact p {
    justify-content: center;
  }
  
  .conference-details {
    flex-direction: column;
    gap: 1rem;
  }
  
  .conference-features {
    grid-template-columns: 1fr;
  }
  
  .conference-buttons {
    flex-direction: column;
  }
  
  .partners-grid {
    grid-template-columns: 1fr;
  }
  
  .about-stats {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
}

/* ===== Form Status Messages ===== */
.form-status {
    padding: 1rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    text-align: center;
    transition: opacity 0.3s ease;
}

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

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

/* Loading spinner animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spinner {
    animation: spin 1s linear infinite;
}