:root {
    --primary: #032B44;
    --secondary: #3CB371;
    --accent: #FFA500;
    --bg: #F5F5F5;
    --text: #333333;
    --light: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @font-face {
    font-family: 'Roboto';
    src: local('Roboto'), local('Roboto-Regular');
    font-weight: 400;
    font-display: swap;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding: 0;
  }

  .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: minmax(250px, 300px) 1fr;
    gap: 2rem;
  }

  .hero {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--light);
    padding: 4rem 2rem;
    border-radius: 12px;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: rotate(30deg);
  }

  .hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
  }

  .hero p {
    font-size: 1.2rem;
    max-width: 700px;
    position: relative;
    z-index: 2;
    opacity: 0.9;
  }

  .sidebar {
    background: var(--light);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    align-self: start;
    position: sticky;
    top: 2rem;
  }

  .sidebar h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  .sidebar h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
  }

  .sidebar nav ul {
    list-style: none;
  }

  .sidebar nav li {
    margin-bottom: 0.8rem;
  }

  .sidebar nav a {
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    transition: var(--transition);
    border-radius: 6px;
  }

  .sidebar nav a:hover {
    color: var(--accent);
    transform: translateX(5px);
  }

  .sidebar nav a::before {
    content: '→';
    margin-right: 0.5rem;
    color: var(--secondary);
    opacity: 0;
    transition: var(--transition);
  }

  .sidebar nav a:hover::before {
    opacity: 1;
  }

  .content {
    background: var(--light);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow);
  }

  .content h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  .content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 70px;
    height: 3px;
    background: var(--secondary);
  }

  .content h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
  }

  .content p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
  }

  .content pre {
    background: #f8f8f8;
    border-left: 4px solid var(--secondary);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 6px 6px 0;
    overflow-x: auto;
  }

  .content code {
    font-family: monospace;
    color: var(--primary);
  }

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

  .image-card {
    background: var(--light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px 8px 0 0;
  }

  .image-card p {
    padding: 1rem;
    font-size: 0.9rem;
    color: #666;
  }

  .notice {
    background: rgba(60, 179, 113, 0.1);
    border-left: 4px solid var(--secondary);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 6px 6px 0;
  }

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

  .footer {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    color: #666;
    font-size: 0.9rem;
  }

  @media (max-width: 900px) {
    .container {
      grid-template-columns: 1fr;
    }
    
    .sidebar {
      position: static;
    }
  }

  @media (max-width: 600px) {
    .hero {
      padding: 3rem 1.5rem;
    }
    
    .hero h1 {
      font-size: 2rem;
    }
    
    .content {
      padding: 2rem 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

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

  /* Button styles */
  .btn {
    display: inline-block;
    background: var(--secondary);
    color: var(--light);
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(60, 179, 113, 0.3);
    border: none;
    cursor: pointer;
    margin: 1rem 0;
  }

  .btn:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(3, 43, 68, 0.3);
  }

  /* Card styles */
  .card {
    background: var(--light);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }