body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    display: flex;
    height: 100vh;
    background-color: #f0f0f0;
  }

  .container {
    display: flex;
    width: 100%;
  }

  /* Bagian kiri dengan background futuristik dan logo */
  .left-panel {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    overflow: hidden;
    background-color: #000;
    border-right: 1px solid #ddd;
    text-align: center;
  }

  /* Animasi latar belakang gradasi futuristik */
  .background-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    /*background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);*/
    background-size: 600% 600%;
    animation: gradientShift 15s ease infinite;
  }

  @keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  /* Kotak-kotak bergerak, hanya garis border */
  .boxes {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
  }

  /* Kotak tanpa isi, hanya garis border dengan nuansa warna #d30000 */
  .box {
    position: absolute;
    border: 2px solid #d30000; /* Warna garis merah tua neon */
    background: transparent; /* Tidak ada isi */
  }

  /* Kotak kecil */
  .small {
    width: 20px;
    height: 20px;
    animation: moveSmall 10s linear infinite;
  }

  /* Kotak besar */
  .large {
    width: 80px;
    height: 80px;
    border-color: #d30000; /* Warna garis merah tua neon */
    animation: moveLarge 12s linear infinite;
  }

  /* Animasi kotak kecil */
  @keyframes moveSmall {
    0% {
      transform: translate(10%, 20%) scale(1);
      top: 20%;
      left: 10%;
    }
    25% {
      transform: translate(70%, 70%) scale(1.2);
      top: 70%;
      left: 70%;
    }
    50% {
      transform: translate(10%, 20%) scale(1);
      top: 20%;
      left: 10%;
    }
    75% {
      transform: translate(70%, 70%) scale(0.8);
      top: 70%;
      left: 70%;
    }
    100% {
      transform: translate(10%, 20%) scale(1);
      top: 20%;
      left: 10%;
    }
  }

  /* Animasi kotak besar */
  @keyframes moveLarge {
    0% {
      transform: translate(50%, 10%) scale(1);
      top: 10%;
      left: 50%;
    }
    25% {
      transform: translate(20%, 80%) scale(1.1);
      top: 80%;
      left: 20%;
    }
    50% {
      transform: translate(50%, 10%) scale(1);
      top: 10%;
      left: 50%;
    }
    75% {
      transform: translate(80%, 50%) scale(0.9);
      top: 50%;
      left: 80%;
    }
    100% {
      transform: translate(50%, 10%) scale(1);
      top: 10%;
      left: 50%;
    }
  }

  /* Logo gambar di atas teks */
  .logo {
    position: relative;
    z-index: 2;
    max-width: 50%;
    
    margin-bottom: 10px;
  }

  /* Gambar logo */
  .logo img {
    width: 100%;
    height: auto;
    border-radius: 20%;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s;
  }

  /* Efek hover pada logo */
  .logo img:hover {
    transform: scale(1.1);
  }

  /* Judul utama */
  .left-panel h1 {
    position: relative;
    z-index: 2;
    font-size: 2em;
    color: #d30000; /* Nuansa merah neon */
    margin-bottom: 20px;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  /* Deskripsi teks */
  .left-panel p {
    position: relative;
    z-index: 2;
    font-size: 1.1em;
    color: #ddd;
    max-width: 300px;
    margin: 0 auto;
    animation: fadeIn 2s ease;
  }

  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  /* Panel kanan (form login) */
  .right-panel {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background-color: #fafafa;
  }

  .form-box {
    width: 100%;
    max-width: 400px;
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .form-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  }

  /* Judul form */
  .form-box h2 {
    margin-bottom: 20px;
    color: #b22222;
    text-align: center;
    animation: fadeInDown 1s ease;
  }

  @keyframes fadeInDown {
    from {
      opacity: 0;
      transform: translateY(-20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Input form */
  input[type=text], input[type=password] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0 16px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.2s, box-shadow 0.2s;
  }

  input[type=text]:focus, input[type=password]:focus {
    border-color: #b22222;
    box-shadow: 0 0 8px rgba(178, 34, 34, 0.3);
    outline: none;
  }

  /* Button login */
  .btn {
    width: 100%;
    background-color: #b22222;
    color: white;
    padding: 14px 20px;
    margin-top: 10px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s, transform 0.2s;
  }

  .btn:hover {
    background-color: #8b1a1a;
    transform: scale(1.02);
  }

  /* Responsif */
  @media(max-width: 768px){
    .container {
      flex-direction: column;
    }
    .left-panel, .right-panel {
      flex: none;
      width: 100%;
      border: none;
    }
    .left-panel {
      border-bottom: 1px solid #ddd;
    }
  }