/* General Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #121212;
    color: #e0e0e0;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }
  a {
    color: #4db8ff;
    text-decoration: none;
  }
  a:hover {
    text-decoration: underline;
  }
  nav.navbar {
    background: rgba(20, 20, 20, 0.85);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
    backdrop-filter: blur(8px);
  }
  nav.navbar .logo {
    font-weight: 700;
    font-size: 1.8rem;
    color: #4db8ff;
  }
  nav.navbar .nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
  }
  nav.navbar .nav-links li a {
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: background 0.3s ease;
  }
  nav.navbar .nav-links li a:hover,
  nav.navbar .nav-links li a.active {
    background: #4db8ff;
    color: #121212;
  }
  
  main {
    flex-grow: 1;
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 1rem;
  }
  
  footer {
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
    color: #777;
    background: #111;
    user-select: none;
  }
  
  /* Buttons */
  .btn-primary, .btn-secondary {
    display: inline-block;
    font-weight: 700;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-align: center;
    border: none;
    user-select: none;
  }
  .btn-primary {
    background-color: #4db8ff;
    color: #121212;
  }
  .btn-primary:hover {
    background-color: #3399ff;
  }
  .btn-secondary {
    background-color: #333;
    color: #eee;
    margin-top: 1rem;
  }
  .btn-secondary:hover {
    background-color: #4db8ff;
    color: #121212;
  }
  
  /* Responsive Nav for small screens */
  @media (max-width: 600px) {
    nav.navbar .nav-links {
      flex-direction: column;
      gap: 0.75rem;
    }
  }