:root {
  --primary-dark: #121E3C;
  --primary-purple: #5C2D91;
  --accent-green: #4CAF50;
  --accent-orange: #FF9800;
  --light-text: #FFFFFF;
  --dark-text: #212121;
  --font-main: 'Roboto', sans-serif;
  --font-code: 'Fira Code', monospace;
}

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Fira+Code&display=swap');

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  background: radial-gradient(circle at 10% 20%, var(--primary-dark), #0a1226);
  color: var(--light-text);
  line-height: 1.6;
}

.header {
  position: relative;
  padding: 2rem 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(92,45,145,0.2) 0%, rgba(18,30,60,0.8) 100%);
  margin-bottom: 3rem;
  border-bottom: 1px solid rgba(76,175,80,0.3);
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-orange));
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(18,30,60,0.95);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0,0,0,0.1);
  border-bottom: 1px solid rgba(76,175,80,0.2);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--light-text);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 24px;
  margin-right: 10px;
  background: linear-gradient(45deg, var(--accent-green), var(--accent-orange));
  border-radius: 4px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu li {
  position: relative;
  margin: 0 1rem;
}

.nav-menu a {
  color: var(--light-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.3s ease;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-green);
  transition: width 0.3s ease;
}

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

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

.notice {
  background: rgba(76,175,80,0.1);
  border-left: 4px solid var(--accent-green);
  padding: 1rem;
  margin: 2rem auto;
  max-width: 1200px;
  border-radius: 0 4px 4px 0;
  font-size: 0.9rem;
}

.container {
  max-width: 1200px;
  margin: 6rem auto 3rem;
  padding: 0 2rem;
}

article {
  background: rgba(18,30,60,0.7);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  border: 1px solid rgba(76,175,80,0.1);
}

article h2 {
  color: var(--accent-green);
  font-size: 2rem;
  margin-top: 0;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(76,175,80,0.3);
  position: relative;
}

article h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), transparent);
}

article h3 {
  color: var(--accent-orange);
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

article p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

article span {
  color: var(--accent-orange);
  font-weight: 500;
}

pre {
  background: rgba(18,30,60,0.9);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
  border-left: 4px solid var(--accent-green);
  box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  position: relative;
}

pre::before {
  content: "CSS";
  position: absolute;
  top: 0;
  left: 0;
  background: var(--accent-green);
  color: var(--light-text);
  padding: 0.2rem 0.8rem;
  font-size: 0.8rem;
  border-radius: 0 0 4px 0;
}

code {
  font-family: var(--font-code);
  font-size: 0.9rem;
  color: #f8f8f2;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.image-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.image-card img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.image-card:hover img {
  transform: scale(1.05);
}

.image-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(transparent 60%, rgba(0,0,0,0.7));
  z-index: 1;
}

.footer {
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
  background: rgba(18,30,60,0.7);
  border-top: 1px solid rgba(76,175,80,0.2);
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav-menu {
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-menu li {
    margin: 0.5rem;
  }
  
  article {
    padding: 1.5rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

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

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