:root {
  --primary-1: #A8D5BA;
  --primary-2: #D9CAB3;
  --secondary-1: #4A90E2;
  --secondary-2: #7B7B7B;
  --accent: #FFA500;
  --text-dark: #333;
  --text-light: #f8f8f8;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

@font-face {
  font-family: 'Montserrat';
  src: url('https://fonts.gstatic.com/s/montserrat/v25/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Hw5aX8.woff2') format('woff2');
}

@font-face {
  font-family: 'Open Sans';
  src: url('https://fonts.gstatic.com/s/opensans/v35/memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.woff2') format('woff2');
}

body {
  font-family: 'Open Sans', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  min-height: 100%;
  overflow-x: hidden;
}

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

.header {
  background: linear-gradient(135deg, var(--primary-1) 0%, var(--primary-2) 100%);
  padding: 2rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
  opacity: 0.1;
  z-index: 0;
}

.header-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.header h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.8rem;
  color: white;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.header p {
  font-size: 1.2rem;
  color: white;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.note {
  background-color: rgba(255, 255, 255, 0.2);
  padding: 1rem;
  border-radius: 8px;
  display: inline-block;
  backdrop-filter: blur(5px);
  margin-top: 1rem;
}

.navigation {
  background-color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

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

.nav-links a {
  font-family: 'Montserrat', sans-serif;
  text-decoration: none;
  color: var(--secondary-1);
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}

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

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

.main-content {
  padding: 3rem 0;
}

.article-container {
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  padding: 3rem;
  margin-bottom: 3rem;
}

.article-container h2 {
  font-family: 'Montserrat', sans-serif;
  color: var(--secondary-1);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.article-container h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--primary-1) 100%);
}

.article-container h3 {
  font-family: 'Montserrat', sans-serif;
  color: var(--secondary-1);
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

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

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

.image-card {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

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

pre {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  border-left: 4px solid var(--accent);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
}

code {
  font-family: 'Courier New', Courier, monospace;
  background-color: rgba(168, 213, 186, 0.2);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

.footer {
  background: linear-gradient(135deg, var(--secondary-1) 0%, var(--secondary-2) 100%);
  color: white;
  padding: 3rem 0;
  text-align: center;
}

.footer p {
  margin-bottom: 1rem;
}

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

.footer-links a {
  color: white;
  text-decoration: none;
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  .article-container {
    padding: 2rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

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

.section {
  animation: fadeIn 0.8s ease-out forwards;
}

.highlight-box {
  background: linear-gradient(135deg, rgba(168, 213, 186, 0.1) 0%, rgba(217, 202, 179, 0.1) 100%);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: 0 8px 8px 0;
}

.color-swatch {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.scroll-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--accent);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  z-index: 99;
}

.scroll-indicator:hover {
  transform: scale(1.1);
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  fill: white;
}