:root {
  --primary: #0D47A1;
  --secondary: #651FFF;
  --accent: #FF9800;
  --text: #FFFFFF;
  --bg-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  --card-bg: rgba(63, 81, 181, 0.8);
}

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

body {
  background: var(--bg-gradient);
  color: var(--text);
  line-height: 1.6;
  padding-top: 80px;
  min-height: 100%;
}

.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(13, 71, 161, 0.95);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(45deg, var(--accent), #FFC107);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

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

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

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

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

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

.hero {
  text-align: center;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(45deg, var(--text), #BBDEFB);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 2rem;
}

.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);
}

.notice p {
  font-size: 0.9rem;
  opacity: 0.9;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.3);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
}

.card:hover .card-img {
  transform: scale(1.02);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.card p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

.btn:hover {
  background: #E68900;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 152, 0, 0.4);
}

.article {
  background: rgba(26, 35, 126, 0.7);
  border-radius: 16px;
  padding: 3rem;
  margin: 3rem 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.1);
}

.article h2 {
  font-size: 2.2rem;
  margin-bottom: 2rem;
  color: var(--text);
  position: relative;
  padding-bottom: 1rem;
}

.article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
}

.article h3 {
  font-size: 1.8rem;
  margin: 2rem 0 1.5rem;
  color: var(--text);
}

.article p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

pre {
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
}

code {
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  color: #BBDEFB;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: rgba(63, 81, 181, 0.5);
  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(13, 71, 161, 0.7);
  font-weight: 500;
}

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

.footer {
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
  background: rgba(13, 71, 161, 0.8);
  border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav {
    margin-top: 1rem;
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .article {
    padding: 2rem 1.5rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
}

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

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