* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: 'Montserrat', sans-serif;
    background-color: #0b0c2a;
    color: #1a1a1a;
  }


  /* Header Section */
  header {
    background-color: #0b0c2a;
    padding: 3rem 1rem 2rem;
    text-align: center;
    color: #f0f0f0;
  }

  header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }

  header p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    color: #f0f0f0;
  }

  /* Page Header */
  .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    max-width: 900px;
    margin: auto;
  }

  .page-header h2 {
    font-size: 1.8rem;
    color: #40cb7a;
  }

  .back-btn {
    background-color: #40cb7a;
    border: 1px solid #ccc;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    color: #333;
    transition: background-color 0.2s;
  }

  .back-btn:hover {
    background-color: #7eebab;
  }

  /* Cards */
  .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
  }

  .card {
    background-color: #1f1359;
    border: 1px solid #40cb7a;
    border-radius: 10px;
    margin-bottom: 1rem;
    padding: 1.2rem 1.5rem;
    cursor: pointer;
    transition: box-shadow 0.2s;
  }

  .card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  }

  .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.05rem;
    color: #40cb7a;
  }

  .card-content {
    display: none;
    margin-top: 0.8rem;
    animation: fadeIn 0.3s ease-in-out;
  }

  .card-content p {
    margin-bottom: 1rem;
    color: #f0f0f0;
  }

  .learn-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #40cb7a;
    color: #333;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s;
  }

  .learn-btn:hover {
    background-color: #7eebab;
  }

  .arrow {
    font-size: 1.2rem;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* Practice Section */
  .practice-section {
    text-align: center;
    margin: 3rem auto;
    padding: 2rem;
    max-width: 800px;
    background-color: #1f1359;
    border-radius: 10px;
    border: 1px solid #40cb7a;
  }

  .practice-section-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
  }

  .practice-section h4 {
    color: #40cb7a;
    font-size: 1.4rem;
  }

  .practice-section p {
    color: #f0f0f0;
    margin-top: 1rem;
    margin-bottom: 2rem;
  }

  .practice-section a {
    display: inline-block;
    background-color: #40cb7a;
    color: #333;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    border-color: #1f1359;
    font-weight: bold;
  }

  .practice-section a:hover {
    background-color: #7eebab;
  }

  /* Footer */
  footer {
    background-color: #1f1359;
    color: #f0f0f0;
    text-align: center;
    padding: 1rem;
    margin-top: 3rem;
  }
  .glowing-spots {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
  }

  .glowing-spots span {
    position: absolute;
    display: block;
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, #806aed, transparent 70%);
    border-radius: 50%;
    animation: moveGlow 20s linear infinite;
    opacity: 0.5;
    filter: blur(8px);
  }

  @keyframes moveGlow {
    0% {
      transform: translateY(100vh) translateX(0) scale(0.5);
      opacity: 0.2;
    }

    50% {
      opacity: 0.8;
    }

    100% {
      transform: translateY(-100vh) translateX(50vw) scale(1);
      opacity: 0;
    }
  }
  .cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  margin-left: -20px; /* half width */
  margin-top: -20px;  /* half height */
  border-radius: 50%;
  pointer-events: none;
  background: rgba(134, 110, 237, 0.6);
  box-shadow: 0 0 8px 4px rgba(134, 110, 237, 0.7);
  transition: transform 0.1s ease-out;
  mix-blend-mode: screen;
  z-index: 9999;
  transform: translate3d(0, 0, 0);
}