:root {
    --primary-color: #4a6fa5;
    --secondary-color: #6b8cae;
    --accent-color: #ff7e5f;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --success-color: #28a745;
    --error-color: #dc3545;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background: #0f172a;
    color: #f1f5f9;
    overflow-x: hidden;
  }
  
  header {
    text-align: center;
    padding: 4rem 2rem 2rem;
    background: linear-gradient(to right, #3b82f6, #9333ea);
    color: white;
    animation: fadeIn 1s ease-in-out;
  }
  
  h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
  }
  
  main {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-in-out;
  }
  
  .card {
    background: #1e293b;
    padding: 2rem;
    border-radius: 1.5rem;
    width: 280px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
  }
  
  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.3);
  }
  
  .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }
  
  .tool-section {
    display: none;
    width: 100%;
    max-width: 600px;
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease-in-out;
  }
  
  textarea,
  input[type="file"] {
    width: 100%;
    margin-top: 1rem;
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    background: #334155;
    color: #f1f5f9;
    font-size: 1rem;
  }
  
  button {
    margin-top: 1rem;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    border: none;
    border-radius: 0.5rem;
    background: #3b82f6;
    color: white;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  button:hover {
    background: #2563eb;
  }
  
  footer {
    text-align: center;
    padding: 2rem;
    color: #cbd5e1;
    font-size: 0.875rem;
    border-top: 1px solid #334155;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }