:root {
  --primary-blue: #1A237E;
  --primary-purple: #6200EA;
  --accent-green: #388E3C;
  --accent-orange: #FFA000;
  --background-gradient: linear-gradient(135deg, #1A237E, #6200EA);
  --card-bg: rgba(255, 255, 255, 0.1);
  --text-light: #FFFFFF;
  --text-muted: rgba(255, 255, 255, 0.7);
}

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

@font-face {
  font-family: 'Roboto';
  src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
}

@font-face {
  font-family: 'Open Sans';
  src: url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap');
}

body {
  font-family: 'Roboto', sans-serif;
  color: var(--text-light);
  background: var(--background-gradient);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
}

.hero {
  position: relative;
  height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 20px;
  overflow: hidden;
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(98, 0, 234, 0.3), transparent 70%);
  z-index: -1;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.2); opacity: 0.5; }
}

.hero h1 {
  font-family: 'Open Sans', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  background: linear-gradient(90deg, #FFFFFF, #E0E0E0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.5rem);
  max-width: 800px;
  margin-bottom: 2rem;
  color: var(--text-muted);
}

.notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.7);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 14px;
  z-index: 1000;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

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

h2, h3, h4 {
  font-family: 'Open Sans', sans-serif;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-bottom: 10px;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-orange));
}

h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
}

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

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  border-left: 4px solid var(--accent-orange);
}

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

.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-tabs a {
  padding: 10px 20px;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.nav-tabs a:hover {
  color: var(--text-light);
}

.nav-tabs a::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-orange);
  transition: width 0.3s ease;
}

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

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.gallery img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 12px;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.gallery img:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }
  
  .hero {
    height: auto;
    padding: 100px 20px;
  }
  
  .card {
    padding: 20px;
  }
}