:root {
  --primary-green: #2d7a4f;
  --secondary-green: #ade4c5;
  --primary-blue: #1e5b8a;
  --accent-teal: #3a9cab;
  --neutral-dark: #2c3e50;
  --neutral-gray: #5a6c7d;
  --neutral-light: #f8f9fa;
  --white: #ffffff;
  --text-primary: #2c3e50;
  --text-secondary: #5a6c7d;

  /* Typography Scale */
  --font-heading: "Playfair Display", serif;
  --font-body: "Inter", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--white);
  overflow-x: hidden;
}

/* Typography Hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--neutral-dark);
  margin-bottom: 1rem;
}

h1 {
  font-size: 3.5rem;
}
h2 {
  font-size: 2.75rem;
}
h3 {
  font-size: 2rem;
}
h4 {
  font-size: 1.5rem;
}
h5 {
  font-size: 1.25rem;
}
h6 {
  font-size: 1rem;
}

p {
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Container System */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
      NAVIGATION (OPTIONAL SIMPLE NAV)
  =================================== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-green);
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 40px;
  width: auto;
  margin-right: 0.5rem;
  vertical-align: middle;
  border: #2d7a4f 1px solid;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--primary-green);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
  margin-left: 1rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--primary-green);
  transition: 0.3s;
  border-radius: 2px;
}

/* ===================================
      HERO SECTION
  =================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  background: linear-gradient(
      135deg,
      rgba(45, 122, 79, 0.85),
      rgba(30, 91, 138, 0.85)
    ),
    url("https://images.unsplash.com/photo-1488521787991-ed7bbaae773c?w=1600&q=80")
      center/cover;
  padding-top: 80px;
  opacity: 1;
  transform: none;
}

.hero-content {
  max-width: 900px;
  animation: fadeInUp 1.2s ease forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: 4rem;
  color: var(--white);
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
  font-size: 1.5rem;
  font-family: var(--font-body);
  font-weight: 300;
  margin-bottom: 3rem;
  color: rgba(255, 255, 255, 0.95);
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

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

/* ===================================
      ABOUT SECTION
  =================================== */
.about {
  background: var(--neutral-light);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  color: var(--primary-green);
  position: relative;
  display: inline-block;
  padding-bottom: 1rem;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--accent-teal);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 1.15rem;
}

/* ===================================
      DOMAINS SECTION
  =================================== */
.domains {
  background: var(--white);
}

.domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.domain-card {
  background: var(--white);
  border: 2px solid var(--neutral-light);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.4s ease;
}

.domain-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  border-color: var(--accent-teal);
}

.domain-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  color: var(--primary-green);
}

.domain-icon i {
  color: var(--primary-green);
}

.domain-card h3 {
  font-size: 1.4rem;
  color: var(--primary-green);
  margin-bottom: 1rem;
}

.domain-card p {
  font-size: 1rem;
}

/* ===================================
      REALISATIONS SECTION
  =================================== */
.realisations {
  background: var(--neutral-light);
}

.timeline {
  position: relative;
  max-width: 1000px;
  margin: 4rem auto;
}

.timeline-item {
  margin-bottom: 4rem;
  position: relative;
  padding-left: 3rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  background: var(--primary-green);
  border-radius: 50%;
  border: 4px solid var(--secondary-green);
  box-shadow: 0 0 0 4px var(--neutral-light);
}


.timeline-item h3 {
  color: var(--primary-blue);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

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

.timeline-item li {
  padding: 0.75rem 0;
  padding-left: 2rem;
  position: relative;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.timeline-item li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-teal);
  font-weight: 600;
}

.realisations>p {
  padding: 30px 80px;
}

/* ===================================
      PERSPECTIVES SECTION
  =================================== */
.perspectives {
  background: linear-gradient(
    135deg,
    var(--primary-green),
    var(--primary-blue)
  );
  color: var(--white);
}

.perspectives .section-header h2 {
  color: var(--white);
}

.perspectives-content {
  max-width: 900px;
  margin: 0 auto;
}

.perspectives-content p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.15rem;
}

.perspectives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.perspective-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
}

.perspective-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-5px);
}

.perspective-card h4 {
  color: var(--white);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.perspective-card h4 i {
  color: var(--accent-teal);
  font-size: 1.2em;
}

.perspective-card p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
}

.perspectives>p {
  padding: 40px 80px;
  color: var(--white);
}

/* ===================================
      COP30 SECTION
  =================================== */
.cop30 {
  background: var(--white);
  position: relative;
}

.cop30-highlight {
  background: linear-gradient(
    135deg,
    rgba(45, 122, 79, 0.1),
    rgba(30, 91, 138, 0.1)
  );
  border-left: 5px solid var(--primary-green);
  padding: 3rem;
  border-radius: 12px;
  max-width: 900px;
  margin: 3rem auto;
}

.cop30-highlight h3 {
  color: var(--primary-green);
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cop30-badge {
  display: inline-block;
  background: var(--primary-green);
  color: var(--white);
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  margin-top: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

.cop30-highlight h5 {
  margin-top:  15px;
}

/* ===================================
      CALL TO ACTION SECTION
  =================================== */
.cta-section {
  background: var(--neutral-gray);
  color: var(--white);
  text-align: center;
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 3rem;
}

/* ===================================
      FOOTER
  =================================== */
footer {
  background: var(--neutral-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h4 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.footer-section p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
}

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

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.footer-links a i {
  font-size: 1.1em;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ===================================
      RESPONSIVE DESIGN
  =================================== */

/* Mobile Menu Styles */
.nav-links.mobile-open {
  display: flex !important;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  flex-direction: column;
  padding: 2rem;
  gap: 1rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  border-radius: 0 0 12px 12px;
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -5px);
}

/* Tablet and Mobile Styles */
@media (max-width: 1024px) {
  .container {
    padding: 0 1.5rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero-tagline {
    font-size: 1.3rem;
  }

  .domains-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
  }

  .perspectives-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
  }

  .footer-content {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 2rem;
  }
  h3 {
    font-size: 1.5rem;
  }

  .hero {
    height: 90vh;
    min-height: 600px;
    padding-top: 80px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-tagline {
    font-size: 1.1rem;
    margin-bottom: 2rem;
  }

  .hero-content {
    max-width: 95%;
    padding: 0 1rem;
  }

  section {
    padding: 3rem 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .cta-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    padding: 0.875rem 2rem;
    font-size: 0.9rem;
  }

  .domains-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2rem;
  }

  .domain-card {
    padding: 2rem 1.5rem;
  }

  .domain-icon {
    font-size: 3rem;
  }

  .timeline {
    margin: 2rem auto;
  }

  .timeline-item {
    padding-left: 2rem;
    margin-bottom: 2rem;
  }

  .timeline-item h3 {
    font-size: 1.5rem;
  }

  .timeline-item li {
    font-size: 1rem;
    padding: 0.5rem 0;
    padding-left: 1.5rem;
  }

  .perspectives-content {
    padding: 0 1rem;
  }

  .perspectives-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
  }

  .perspective-card {
    padding: 1.5rem;
  }

  .cop30-highlight {
    padding: 2rem 1.5rem;
    margin: 2rem 1rem;
  }

  .cop30-highlight h3 {
    font-size: 1.75rem;
  }

  .cta-section h2 {
    font-size: 1.75rem;
  }

  .cta-section p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .footer-section {
    text-align: center;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero {
    height: 85vh;
    min-height: 500px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-tagline {
    font-size: 1rem;
  }

  .nav-logo {
    font-size: 1.25rem;
  }

  .nav-logo img {
    height: 32px;
    margin-right: 0.375rem;
  }

  section {
    padding: 2rem 0;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .about-content p {
    font-size: 1rem;
  }

  .domain-card {
    padding: 1.5rem 1rem;
  }

  .domain-card h3 {
    font-size: 1.25rem;
  }

  .domain-card p {
    font-size: 0.95rem;
  }

  .timeline-item h3 {
    font-size: 1.25rem;
  }

  .perspectives .section-header h2 {
    font-size: 1.75rem;
  }

  .perspectives-content p {
    font-size: 1rem;
  }

  .perspective-card h4 {
    font-size: 1rem;
  }

  .perspective-card p {
    font-size: 0.95rem;
  }

  .cop30-highlight h3 {
    font-size: 1.5rem;
  }

  .cop30-highlight p {
    font-size: 1rem;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }

  .cta-section p {
    font-size: 1rem;
  }

  .footer-section h4 {
    font-size: 1.1rem;
  }

  .footer-section p {
    font-size: 0.9rem;
  }

  .footer-links li {
    margin-bottom: 0.5rem;
  }
}