/* Reset and Base */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
  }

  body {
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
  }

  /* Header */
  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #1903e0;
    padding: 15px 50px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 10;
  }

  /* Logo + glow animation */
  .logo-container {
    position: relative;
    display: inline-block;
  }

  .logo-container img {
    height: 55px;
    transition: transform 0.3s ease;
    z-index: 2;
    position: relative;
  }

  .logo-container img:hover {
    transform: scale(1.08);
  }

  /* Glow effect under logo */
  .logo-glow {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 10px;
    background: radial-gradient(circle, rgba(7, 223, 176, 0.8), rgba(255,0,0,0));
    border-radius: 50%;
    filter: blur(4px);
    animation: glow 2.5s infinite ease-in-out;
    z-index: 1;
  }

  @keyframes glow {
    0%, 100% {
      opacity: 0.5;
      transform: translateX(-50%) scale(1);
    }
    50% {
      opacity: 1;
      transform: translateX(-50%) scale(1.2);
    }
  }
  /* =========================
    Navigation
  ========================= */

  header nav ul {
      list-style: none;
      display: flex;
      gap: 30px;
      margin: 0;
      padding: 0;
  }

  header nav ul li {
      display: inline-block;
      position: relative;
      margin: 0;
      padding: 0;
  }

  header nav ul li a,
  header nav ul li a:visited {
      display: inline-block;
      position: relative;
      padding: 0 0 5px 0;
      margin: 0;
      color: #fff;
      text-decoration: none;
      font-weight: 600;
      font-size: 16px;
      transition: color 0.3s ease;
  }

  /* Hover underline */
  header nav ul li a::after {
      content: "";
      position: absolute;
      width: 0;
      height: 2px;
      left: 0;
      bottom: 0;
      background-color: #fff;
      transition: width 0.3s ease;
  }

  header nav ul li a:hover {
      color: #ffcc00;
      text-decoration: none;
  }

  header nav ul li a:hover::after {
      width: 100%;
  }

  header nav ul li a.active,
  header nav ul li a.active:visited {
      color: #ffcc00;
      text-decoration: none;
  }

  header nav ul li a.active::after {
      width: 100%;
  }

  /* Jangan ubah warna nav saat active/klik */
  header nav ul li a:active {
      color: #ffcc00;
      text-decoration: none;
  }

  /* Main content */
  main {
    max-width: 1000px;
    margin: 40px auto;
    background-color: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  }

  h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #0027d6;
    font-size: 28px;
  }

  h2 {
    margin-bottom: 15px;
    color: #333;
    font-size: 20px;
  }

  p, a {
    font-size: 16px; margin:3px;
  }

  a,
  a:visited {
      color: #007bff;
      text-decoration: none;
  }

  a:hover {
      color: #0056b3;
      text-decoration: underline;
  }

  a:active {
      color: #dc3545;
  }

  /* Footer */
  footer {
    text-align: center;
    background-color: #111;
    color: #fff;
    padding: 15px;
    margin-top: 50px;
    font-size: 14px;
    letter-spacing: 0.5px;
  }

  /* Responsive Design */
  @media (max-width: 768px) {
    header {
      flex-direction: column;
      text-align: center;
      padding: 15px;
    }

    nav ul {
      flex-direction: column;
      gap: 10px;
      margin-top: 10px;
    }

    main {
      margin: 20px;
      padding: 20px;
    }

    .logo-glow {
      width: 40px;
      height: 8px;
    }
  }