/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background-color: #ffffff;
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.5);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo h2 {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, #1e40af, #0891b2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: #374151;
  font-weight: 500;
  font-size: 15px;
  position: relative;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #1e40af;
}

.nav-link::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 50%;
  background: linear-gradient(135deg, #1e40af, #0891b2);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

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

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

.bar {
  width: 25px;
  height: 3px;
  background: #374151;
  transition: 0.3s;
  border-radius: 2px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23e0f2fe" fill-opacity="0.3"><circle cx="30" cy="30" r="2"/></g></svg>');
  opacity: 0.6;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  animation: slideInLeft 1s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  color: #1f2937;
}

.gradient-text {
  background: linear-gradient(135deg, #1e40af, #0891b2, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 18px;
  color: #6b7280;
  margin-bottom: 40px;
  line-height: 1.7;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #1e40af, #0891b2);
  color: white;
  box-shadow: 0 4px 15px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
}

.btn-secondary {
  background: white;
  color: #1e40af;
  border: 2px solid #1e40af;
}

.btn-secondary:hover {
  background: #1e40af;
  color: white;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

.hero-image {
  animation: slideInRight 1s ease-out;
}

.hero-img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-arrow {
  width: 30px;
  height: 30px;
  border-right: 2px solid #1e40af;
  border-bottom: 2px solid #1e40af;
  transform: rotate(45deg);
  animation: bounce 2s infinite;
}

/* Section Styles */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* About Section */
.about {
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.about-card {
  background: white;
  padding: 40px 30px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #f3f4f6;
}

.about-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.card-icon {
  font-size: 48px;
  margin-bottom: 20px;
  display: block;
}

.about-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 16px;
}

.about-card p {
  color: #6b7280;
  line-height: 1.6;
}

/* Event Section */
.event {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.event-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.event-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.event-card {
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #f3f4f6;
}

.event-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.event-details p {
  margin-bottom: 12px;
  color: #4b5563;
}

.event-details strong {
  color: #1f2937;
  font-weight: 600;
}

.schedule {
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #f3f4f6;
}

.schedule h3 {
  font-size: 24px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 30px;
  text-align: center;
}

.timeline {
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(135deg, #1e40af, #0891b2);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 40px;
}

.timeline-marker {
  position: absolute;
  left: 12px;
  top: 0;
  width: 16px;
  height: 16px;
  background: #1e40af;
  border-radius: 50%;
  border: 4px solid white;
  box-shadow: 0 0 0 2px #1e40af;
}

.timeline-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 12px;
}

.timeline-item p {
  color: #6b7280;
  margin-bottom: 6px;
  font-size: 14px;
}

/* Gallery Section */
.gallery {
  background: white;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.gallery-item {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: white;
  padding: 30px 20px 20px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

.gallery-overlay h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.gallery-overlay p {
  font-size: 14px;
  opacity: 0.9;
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, #1e40af, #0891b2);
  color: white;
}

.contact .section-title,
.contact .section-subtitle {
  color: white;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
}

.contact-icon {
  font-size: 40px;
  margin-bottom: 16px;
  display: block;
}

.contact-card h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-card p {
  opacity: 0.9;
  margin-bottom: 6px;
}

.registration-form {
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.registration-form h3 {
  font-size: 24px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 30px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.3s ease;
  background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #1e40af;
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* Footer */
.footer {
  background: #1f2937;
  color: white;
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #60a5fa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-section h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: #f9fafb;
}

.footer-section p {
  color: #d1d5db;
  line-height: 1.6;
}

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

.footer-section ul li {
  margin-bottom: 8px;
}

.footer-section ul li a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: #60a5fa;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #374151;
  color: #9ca3af;
}

/* Animations */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0) rotate(45deg);
  }
  40% {
    transform: translateY(-10px) rotate(45deg);
  }
  60% {
    transform: translateY(-5px) rotate(45deg);
  }
}

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

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .event-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    gap: 20px;
  }

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

  .nav-toggle {
    display: flex;
  }

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

  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  section {
    padding: 60px 0;
  }

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

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: 40px;
  }

  .timeline-marker {
    left: 2px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 16px;
  }

  .section-title {
    font-size: 2rem;
  }

  .about-card,
  .event-card,
  .registration-form {
    padding: 24px 20px;
  }

  .contact-card {
    padding: 24px 20px;
  }
}

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

.mb-4 {
  margin-bottom: 16px;
}

.mb-8 {
  margin-bottom: 32px;
}

.hidden {
  display: none;
}

.fade-in {
  animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling improvements */
html {
  scroll-padding-top: 80px;
}

/* Enhanced button states */
.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Loading states */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Selection styles */
::selection {
  background: rgba(30, 64, 175, 0.2);
  color: #1e40af;
}

/* Focus styles for accessibility */
*:focus-visible {
  outline: 2px solid #1e40af;
  outline-offset: 2px;
}