:root {
  --primary: #0074D9;
  --secondary: #333333;
  --accent: #FFA500;
  --text: #f8f9fa;
  --bg-dark: #1a1a1a;
  --bg-light: #2d2d2d;
  --card-bg: rgba(45, 45, 45, 0.7);
  --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(26, 26, 26, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 5%;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
  transition: var(--transition);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

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

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

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

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

.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  padding: 4rem 5%;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 116, 217, 0.1) 0%, rgba(26, 26, 26, 0) 70%);
  animation: pulse 15s infinite alternate;
}

@keyframes pulse {
  0% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.2);
    opacity: 0.2;
  }
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  z-index: 1;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1rem;
  animation: fadeInUp 1s ease-out 0.2s forwards;
  opacity: 0;
}

.hero-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  transform: perspective(1000px) rotateY(-10deg);
  transition: var(--transition);
  animation: fadeIn 1s ease-out 0.4s forwards;
  opacity: 0;
}

.hero-image:hover {
  transform: perspective(1000px) rotateY(0deg);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.notice {
  background: rgba(255, 165, 0, 0.1);
  border-left: 4px solid var(--accent);
  padding: 1rem;
  margin: 2rem 0;
  border-radius: 0 4px 4px 0;
  font-size: 0.9rem;
}

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

.section {
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.section-title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

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

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.image-item {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  position: relative;
}

.image-item:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.image-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

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

.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  padding: 1rem;
  transform: translateY(100%);
  transition: var(--transition);
}

.image-item:hover .image-caption {
  transform: translateY(0);
}

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 1.5rem 0;
  border-left: 4px solid var(--primary);
  position: relative;
}

pre::before {
  content: 'CSS';
  position: absolute;
  top: 0;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 0.2rem 0.8rem;
  font-size: 0.8rem;
  border-radius: 0 0 4px 0;
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
  background: rgba(0, 116, 217, 0.2);
  font-weight: 600;
}

tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

.footer {
  background: var(--bg-dark);
  padding: 3rem 5%;
  text-align: center;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

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

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

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

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

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-image {
    order: -1;
    max-width: 600px;
    margin: 0 auto;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: auto;
    padding: 2rem 5%;
  }
  
  .hero-title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  pre {
    padding: 1rem;
    font-size: 0.8rem;
  }
  
  th, td {
    padding: 0.8rem;
  }
}

/* Animation for scroll-triggered elements */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll indicator */
.scroll-indicator {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text);
  font-size: 0.9rem;
  opacity: 0.7;
  animation: bounce 2s infinite;
  z-index: 1000;
}

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