:root {
  --primary-dark-blue: #1F2A37;
  --primary-light-purple: #6C5DD8;
  --accent-green: #4CAF50;
  --accent-orange: #FF9800;
  --background-gray: #F5F5F5;
  --text-primary: #333;
  --text-secondary: #666;
  --white: #fff;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Montserrat', 'Roboto', sans-serif;
  background-color: var(--background-gray);
  color: var(--text-primary);
  line-height: 1.6;
  padding: 0;
  margin: 0;
  min-height: 100%;
}

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

.header {
  background: linear-gradient(135deg, var(--primary-dark-blue) 0%, #2C3A4B 100%);
  color: var(--white);
  padding: 2rem 0;
  position: relative;
  overflow: hidden;
  margin-bottom: 3rem;
}

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

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--white), #E0E0E0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header p {
  font-size: 1.1rem;
  max-width: 800px;
  opacity: 0.9;
}

.notice {
  background-color: rgba(255,255,255,0.1);
  border-left: 4px solid var(--accent-orange);
  padding: 1rem;
  margin: 2rem 0;
  border-radius: 0 4px 4px 0;
}

.notice p {
  margin: 0;
  color: var(--white);
}

.grid-system {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.article-content {
  grid-column: span 8;
}

.sidebar {
  grid-column: span 4;
}

article {
  background-color: var(--white);
  border-radius: 8px;
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

article h2 {
  color: var(--primary-dark-blue);
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light-purple);
}

article h3 {
  color: var(--primary-light-purple);
  font-size: 1.4rem;
  margin: 2rem 0 1rem;
}

article p {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.card {
  background-color: var(--white);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  margin-bottom: 2rem;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.card h4 {
  color: var(--primary-dark-blue);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.img-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.img-container img {
  width: calc(33.333% - 1rem);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.img-container img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}

pre {
  background-color: #2d2d2d;
  color: #f8f8f2;
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

code {
  font-family: 'Courier New', monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  box-shadow: var(--shadow-sm);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background-color: var(--primary-dark-blue);
  color: var(--white);
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

tr:hover {
  background-color: #f1f1f1;
}

.sidebar-card {
  background-color: var(--white);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.sidebar-card h3 {
  color: var(--primary-dark-blue);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light-purple);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background-color: var(--primary-light-purple);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  transition: var(--transition);
}

.tag:hover {
  background-color: var(--accent-orange);
  transform: translateY(-2px);
}

.footer {
  background-color: var(--primary-dark-blue);
  color: var(--white);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer p {
  opacity: 0.8;
  margin-bottom: 1rem;
}

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

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

@media (max-width: 1024px) {
  .grid-system {
    grid-template-columns: 1fr;
  }
  
  .article-content, .sidebar {
    grid-column: span 1;
  }
  
  .img-container img {
    width: calc(50% - 0.5rem);
  }
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  article {
    padding: 1.5rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .img-container img {
    width: 100%;
  }
}

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

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

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

.button {
  display: inline-block;
  background-color: var(--primary-light-purple);
  color: var(--white);
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.button:hover {
  background-color: var(--accent-green);
  box-shadow: var(--shadow-md);
}

.highlight {
  background: linear-gradient(90deg, rgba(108, 93, 216, 0.1), rgba(108, 93, 216, 0.3));
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-weight: 500;
}