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

:root {
  --primary: #0066cc;
  --primary-dark: #0052a3;
  --secondary: #00b8cc;
  --dark: #0f1218;
  --dark-light: #1a1f29;
  --gray: #8a8a92;
  --light: #f4f4f5;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #0066cc 0%, #00b8cc 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--dark);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 184, 204, 0.2) 0%, transparent 50%),
    var(--dark);
  z-index: 1;
}

.hero-bg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230066cc' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 20px;
}

.eyebrow {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--secondary);
  margin-bottom: 20px;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(42px, 8vw, 84px);
  font-weight: 800;
  margin-bottom: 20px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.subtitle {
  font-size: clamp(18px, 3vw, 28px);
  color: var(--gray);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-details {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  color: var(--light);
}

.detail-icon {
  font-size: 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 102, 204, 0.6);
}

.btn-large {
  padding: 18px 48px;
  font-size: 18px;
  width: 100%;
  max-width: 400px;
}

/* Sections */
.section {
  padding: 100px 0;
}

.section h2 {
  font-size: clamp(32px, 5vw, 48px);
  text-align: center;
  margin-bottom: 60px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  text-align: center;
  color: var(--gray);
  font-size: 18px;
  margin-top: -40px;
  margin-bottom: 60px;
}

/* About Section */
.about {
  background: var(--dark-light);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  font-size: 18px;
  color: var(--gray);
  margin-bottom: 20px;
  line-height: 1.8;
}

.features {
  list-style: none;
  margin-top: 30px;
}

.features li {
  font-size: 18px;
  color: var(--light);
  margin-bottom: 15px;
  padding-left: 0;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Agenda Section */
.agenda {
  background: var(--dark);
}

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

.timeline-item {
  display: flex;
  gap: 30px;
  padding: 30px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-time {
  min-width: 180px;
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary);
}

.timeline-content h3 {
  font-size: 22px;
  margin-bottom: 10px;
  color: var(--light);
}

.timeline-content p {
  color: var(--gray);
  font-size: 16px;
}

/* Location Section */
.location {
  background: var(--dark-light);
}

.location-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.location-info h3 {
  font-size: 32px;
  margin-bottom: 20px;
  color: var(--light);
}

.location-info p {
  color: var(--gray);
  margin-bottom: 20px;
  font-size: 16px;
}

.contact-info {
  margin-top: 30px;
  padding: 20px;
  background: rgba(0, 102, 204, 0.1);
  border-radius: 8px;
  border-left: 4px solid var(--primary);
}

.contact-info p {
  margin-bottom: 10px;
}

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

.contact-info a:hover {
  text-decoration: underline;
}

.map-placeholder {
  background: linear-gradient(135deg, rgba(0, 102, 204, 0.2) 0%, rgba(0, 184, 204, 0.1) 100%);
  border-radius: 12px;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--gray);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Registration Section */
.register {
  background: var(--dark);
}

.registration-form {
  max-width: 700px;
  margin: 0 auto;
  background: var(--dark-light);
  padding: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--light);
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--light);
  font-size: 16px;
  font-family: inherit;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray);
}

.form-group select {
  cursor: pointer;
}

.form-group select option {
  background: var(--dark-light);
  color: var(--light);
}

.success-message {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: 40px;
  background: rgba(0, 184, 204, 0.1);
  border-radius: 12px;
  border: 1px solid var(--secondary);
}

.success-message h3 {
  font-size: 28px;
  margin-bottom: 15px;
  color: var(--secondary);
}

.success-message p {
  color: var(--gray);
  font-size: 16px;
}

/* Footer */
.footer {
  background: var(--dark-light);
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
  color: var(--gray);
  font-size: 14px;
  margin-bottom: 10px;
}

.footer-note {
  font-size: 13px;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-details {
    flex-direction: column;
    gap: 15px;
  }

  .about-grid,
  .location-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .timeline-item {
    flex-direction: column;
    gap: 10px;
  }

  .timeline-time {
    min-width: auto;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .registration-form {
    padding: 25px;
  }

  .section {
    padding: 60px 0;
  }
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Animation for hero */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}