/* Base Styles */
:root {
  --primary-color: #00a896;
  --primary-light: #02c39a;
  --primary-dark: #028090;
  --secondary-color: #05668d;
  --accent-color: #f0f3bd;
  --text-color: #333;
  --text-light: #666;
  --background-color: #fff;
  --background-alt: #f8f9fa;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--primary-dark);
  position: relative;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

p {
  margin-bottom: 1rem;
}

section {
  padding: 5rem 0;
}

/* Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
}

.logo h3 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--primary-dark);
}

.logo span {
  color: var(--primary-light);
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
}

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

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

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--primary-dark);
  margin: 2px 0;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  height: 100vh;
  background-image: url("https://images.unsplash.com/photo-1497435334941-8c899ee9e8e9?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  color: white;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s forwards 0.5s;
}

.hero p {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s forwards 0.8s;
}

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

/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 0.8rem 2rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0, 168, 150, 0.4);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s forwards 1.1s;
}

.cta-button:hover {
  background-color: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 168, 150, 0.6);
}

.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 168, 150, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(0, 168, 150, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 168, 150, 0);
  }
}

/* About Section */
.about {
  background-color: var(--background-alt);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1.5rem;
}

.sdg-infographic h3 {
  margin-bottom: 1.5rem;
  text-align: center;
}

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

.sdg-item {
  background-color: var(--primary-color);
  color: white;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

.sdg-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  background-color: var(--primary-light);
}

.sdg-tooltip {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--text-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 10;
}

.sdg-item:hover .sdg-tooltip {
  opacity: 1;
  visibility: visible;
}

/* Why Exhibit Section */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background-color: white;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-light);
  color: white;
  border-radius: 50%;
}

.card-icon svg {
  width: 30px;
  height: 30px;
}

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

/* Who Should Exhibit Section */
.slider-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
}

.slider {
  display: flex;
  transition: transform 0.5s ease;
}

.slide {
  min-width: 100%;
  padding: 1rem;
}

.slide-content {
  background-color: white;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: var(--shadow);
  text-align: center;
  height: 100%;
}

.slide-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.slider-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.slider-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.slider-btn:hover {
  background-color: var(--primary-light);
}

.slider-dots {
  display: flex;
  justify-content: center;
  margin: 0 1rem;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #ccc;
  margin: 0 5px;
  cursor: pointer;
  transition: var(--transition);
}

.dot.active {
  background-color: var(--primary-color);
}

/* Event Highlights Section */
.highlights {
  background-color: var(--background-alt);
}

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

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background-color: var(--primary-color);
}

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

.timeline-icon {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  z-index: 1;
}

.timeline-icon svg {
  width: 24px;
  height: 24px;
}

.timeline-content {
  position: relative;
  width: calc(50% - 50px);
  padding: 1.5rem;
  background-color: white;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-right: auto;
}

.timeline-content::before {
  content: "";
  position: absolute;
  top: 20px;
  width: 20px;
  height: 20px;
  background-color: white;
  transform: rotate(45deg);
}

.timeline-item:nth-child(odd) .timeline-content::before {
  left: -10px;
}

.timeline-item:nth-child(even) .timeline-content::before {
  right: -10px;
}

/* Event Details Section */
.details-card {
  background-color: white;
  border-radius: 10px;
  padding: 3rem;
  box-shadow: var(--shadow);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.details-card .cta-button {
  margin-top: 2rem;
}

.details-item {
  margin-bottom: 2rem;
}

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

/* Contact Section */
.contact {
  background-color: var(--primary-dark);
  color: white;
  text-align: center;
}

.contact h2 {
  color: white;
}

.contact-info {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

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

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.social-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
}

.social-icon:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.social-icon svg {
  width: 24px;
  height: 24px;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Reveal Animation */
.reveal-section {
  opacity: 0;
  transform: translateY(30px);
  transition: all 1s ease;
}

.reveal-section.active {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Styles */
@media (max-width: 992px) {
  h2 {
    font-size: 2rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .timeline::before {
    left: 30px;
  }

  .timeline-icon {
    left: 30px;
    transform: none;
  }

  .timeline-content {
    width: calc(100% - 80px);
    margin-left: 80px !important;
  }

  .timeline-item:nth-child(odd) .timeline-content::before,
  .timeline-item:nth-child(even) .timeline-content::before {
    left: -10px;
    right: auto;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.2rem;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    transform: translateY(-150%);
    transition: var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .nav-links li {
    margin: 1rem 0;
  }

  .nav-toggle {
    display: flex;
  }

  .details-card {
    padding: 2rem 1rem;
  }
}

@media (max-width: 576px) {
  section {
    padding: 3rem 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .timeline-content {
    width: calc(100% - 60px);
    margin-left: 60px !important;
    padding: 1rem;
  }
}