.auth-box {
    max-width: 480px; 
    margin: 3rem auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem; 
    box-shadow: 0 4px 10px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    opacity: 0;
    animation: fadeInUp 0.5s ease-out forwards;
  }
  
  .auth-box h2 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text-main);
  }
  body.dark .auth-box h2 {
    color: var(--accent);
  }
  
  .auth-box .muted {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
  }
  
  .auth-links {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  .auth-links a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
  }
  .auth-links a:hover {
    text-decoration: underline;
  }
  body.dark .auth-links a {
    color: var(--accent);
  }
  
  .auth-box .btn-primary {
    width: 100%;
  }