:root {
  --primary-color: #0f2027;
  --secondary-color: #203a43;
  --accent-color: #00c6ff;
  --highlight-color: #0072ff;
  --text-color: #ffffff;
  --card-bg: rgba(32, 58, 67, 0.7);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

@font-face {
  font-family: 'Orbitron';
  src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&display=swap');
}

body {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), #2c5364);
  color: var(--text-color);
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  padding-top: 80px;
  overflow-x: hidden;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(15, 32, 39, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  background: linear-gradient(45deg, var(--accent-color), var(--highlight-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition);
}

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

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

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

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 5%;
}

.hero {
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 198, 255, 0.1) 0%, transparent 70%);
  animation: pulse 15s infinite alternate;
}

@keyframes pulse {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50%, 50%);
  }
}

.hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(45deg, var(--accent-color), var(--highlight-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  max-width: 700px;
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.notice {
  background: rgba(255, 255, 255, 0.1);
  padding: 1rem;
  border-radius: 8px;
  margin: 2rem 0;
  text-align: center;
  border-left: 4px solid var(--accent-color);
}

.content-section {
  margin: 4rem 0;
}

.section-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.card h3 {
  font-family: 'Orbitron', sans-serif;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.card p {
  margin-bottom: 1.5rem;
}

.img-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.img-container img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
}

.img-container img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 198, 255, 0.3);
}

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--accent-color);
  font-size: 0.9rem;
  line-height: 1.5;
}

code {
  font-family: 'Courier New', monospace;
  color: var(--accent-color);
}

.accordion {
  margin: 2rem 0;
}

.accordion-item {
  background: var(--card-bg);
  border-radius: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.accordion-header {
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  transition: var(--transition);
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 1.5rem;
}

.accordion-content-inner {
  padding: 0 0 1.5rem;
}

.accordion-item.active .accordion-content {
  max-height: 500px;
}

.footer {
  background: rgba(15, 32, 39, 0.9);
  padding: 3rem 5%;
  text-align: center;
  margin-top: 4rem;
}

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

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

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

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav-links {
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* Animation classes */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll indicator */
.scroll-indicator {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: rgba(0, 198, 255, 0.2);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 100;
  transition: var(--transition);
}

.scroll-indicator:hover {
  background: rgba(0, 198, 255, 0.4);
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  fill: var(--accent-color);
}