:root {
  --primary: linear-gradient(135deg, #8BC34A 0%, #2196F3 100%);
  --secondary: #ffffff;
  --accent: #FFC107;
  --text: #333333;
  --light-bg: #f5f7fa;
  --dark-bg: #2c3e50;
  --card-shadow: 0 10px 30px rgba(0,0,0,0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}

body {
  background-color: var(--light-bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.header {
  background: var(--primary);
  color: var(--secondary);
  padding: 2rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 75% 25%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-logo {
  font-size: 1.8rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--secondary);
  position: relative;
  z-index: 2;
}

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

.nav-item {
  position: relative;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--secondary);
  text-decoration: none;
  font-weight: 600;
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

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

.notice {
  background: rgba(255,255,255,0.2);
  padding: 1rem;
  margin: 1rem auto;
  max-width: 800px;
  border-radius: 8px;
  text-align: center;
  backdrop-filter: blur(5px);
}

.main {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.section {
  margin-bottom: 4rem;
  background: var(--secondary);
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}

.section::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(139,195,74,0.1) 0%, transparent 70%);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--dark-bg);
  position: relative;
  display: inline-block;
}

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

.section-subtitle {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--dark-bg);
}

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

.card {
  background: var(--secondary);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  transition: var(--transition);
}

.card:hover .card-img {
  transform: scale(1.03);
}

pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  position: relative;
}

pre::before {
  content: 'CSS';
  position: absolute;
  top: 0;
  left: 0;
  background: var(--accent);
  color: #000;
  padding: 0.2rem 0.8rem;
  font-size: 0.8rem;
  border-radius: 0 0 8px 0;
}

.footer {
  background: var(--dark-bg);
  color: var(--secondary);
  padding: 3rem 0;
  text-align: center;
}

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

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

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

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

.parallax {
  height: 400px;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
  margin: 3rem 0;
  border-radius: 12px;
  overflow: hidden;
}

.parallax::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.3);
}

.parallax-content {
  position: relative;
  z-index: 1;
  color: var(--secondary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 2rem;
  text-align: center;
}

@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .section {
    padding: 1.5rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-item {
    padding: 0.5rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .section-subtitle {
    font-size: 1.2rem;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.float {
  animation: float 3s ease-in-out infinite;
}