.overlay-full {
        position: fixed;
        top: 0; left: 0; width: 100%; height: 100%;
        display: flex; flex-direction: column;
        justify-content: center; align-items: center;
        z-index: 9999; font-family: sans-serif; color: white;
      }
      #menu-welcome { background: rgba(0, 0, 0, 0.9); }
      #menu-dashboard { background: rgba(0, 0, 0, 0.7); display: none; }
      
      /* Input Nama Style */
      .input-nama {
        padding: 15px;
        font-size: 1.2rem;
        border-radius: 10px;
        border: none;
        margin-bottom: 20px;
        width: 300px;
        text-align: center;
      }

      .btn-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .main-btn {
        width: 180px; padding: 25px; font-size: 1.1rem; font-weight: bold;
        text-transform: uppercase; background: white; color: black; border: none;
        cursor: pointer; border-radius: 15px 50px 15px 50px; transition: 0.3s;
      }
      .main-btn:hover { background: #00d4ff; color: white; transform: scale(1.05); }
      .back-btn { position: absolute; top: 30px; left: 30px; background: none; border: none; color: white; font-size: 2.5rem; cursor: pointer; }

     /* Style Kotak Nama & Informasi di Pojok Kanan Atas Laptop */
      .user-tag-laptop {
        position: fixed;
        top: 20px;
        right: 20px;
        background: rgba(0, 15, 30, 0.85);
        border: 2px solid #00d4ff;
        border-radius: 12px;
        padding: 15px;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        z-index: 9999; /* Berada paling atas di layar */
        display: none; /* Diaktifkan via JS saat merakit */
        flex-direction: column;
        gap: 12px;
        width: 280px;
        color: white;
        backdrop-filter: blur(5px);
      }

      .user-header {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 0.9rem;
        border-bottom: 1px solid rgba(0, 212, 255, 0.2);
        padding-bottom: 8px;
        letter-spacing: 1px;
      }

      .user-tag-laptop .dot {
        width: 10px;
        height: 10px;
        background-color: #00ffcc;
        border-radius: 50%;
        box-shadow: 0 0 10px #00ffcc;
      }

      /* Efek Kedip pada Dot Status */
      @keyframes pulse {
        0% { opacity: 0.6; }
        50% { opacity: 1; }
        100% { opacity: 0.6; }
      }
      .animate-pulse {
        animation: pulse 2s infinite;
      }

      .user-body {
        display: flex;
        flex-direction: column;
        gap: 4px;
      }

      .lab-title {
        font-size: 0.8rem;
        color: #00d4ff;
        font-weight: bold;
        letter-spacing: 1.5px;
      }

      .user-body p {
        margin: 0;
        font-size: 0.85rem;
        line-height: 1.4;
        color: #e0e0e0;
      }

      /* Tombol Musik Minimalis di dalam Panel */
      .music-laptop-btn {
        background: rgba(0, 0, 0, 0.5);
        border: 1px solid #00d4ff;
        color: #00d4ff;
        padding: 6px 12px;
        border-radius: 6px;
        cursor: pointer;
        font-size: 0.8rem;
        width: 100%;
        transition: all 0.2s ease;
        text-align: center;
      }

      .music-laptop-btn:hover {
        background: #00d4ff;
        color: #001428;
        box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
      }

      /* Container pembungkus teks dan panah */
      .slider-instruction-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        margin-top: 5px;
      }

      /* Pengaturan Teks Instruksi di Tengah */
      #instruksi-laptop {
        margin: 0;
        font-size: 0.85rem;
        line-height: 1.4;
        color: #e0e0e0;
        text-align: center;
        flex: 1; /* Mengambil sisa ruang tengah */
        min-height: 40px; /* Menjaga tinggi box tetap konsisten saat teks berubah */
        display: flex;
        align-items: center;
        justify-content: center;
      }

      /* Tombol Panah Geser Kiri-Kanan */
      .nav-slide-btn {
        background: transparent;
        border: none;
        color: #00d4ff;
        font-size: 1.1rem;
        cursor: pointer;
        padding: 5px 8px;
        border-radius: 4px;
        transition: all 0.2s ease;
        user-select: none;
      }

      .nav-slide-btn:hover {
        background: rgba(0, 212, 255, 0.2);
        color: #ffffff;
        text-shadow: 0 0 8px #00d4ff;
      }

      .nav-slide-btn:active {
        transform: scale(0.9);
      }

      /* --- STYLE TABEL MATERI (Sesuai Gambar) --- */
      #menu-materi { 
        background: rgba(0, 20, 40, 0.85); 
        display: none; 
      }

      .materi-box {
        width: 85%;
        max-width: 900px;
        background: rgba(255, 255, 255, 0.05);
        border: 2px solid #00d4ff;
        border-radius: 15px;
        padding: 30px;
        backdrop-filter: blur(10px);
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
      }

      .materi-header {
        text-align: center;
        font-size: 2rem;
        font-weight: bold;
        color: #00d4ff;
        margin-bottom: 20px;
        text-transform: uppercase;
        letter-spacing: 3px;
      }

      table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 10px;
      }

      th {
        background: #00d4ff;
        color: #000;
        padding: 15px;
        text-align: left;
        font-size: 1.1rem;
      }

      td {
        padding: 15px;
        border-bottom: 1px solid rgba(0, 212, 255, 0.3);
        font-size: 1rem;
        line-height: 1.5;
      }

      tr:hover {
        background: rgba(0, 212, 255, 0.1);
      }

      .status-tag {
        background: #00d4ff;
        color: black;
        padding: 4px 10px;
        border-radius: 5px;
        font-size: 0.8rem;
        font-weight: bold;
      }

      .materi-img {
        width: 100%;
        max-width: 200px; /* Ukuran gambar agar tidak memenuhi layar */
        height: auto;
        border-radius: 10px;
        margin: 15px auto;
        display: block;
        border: 1px solid #00d4ff;
        box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
      }
      
      .halaman-materi p {
        text-align: justify;
        margin-top: 15px;
      }

      /* Button Styles */
      .btn-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .main-btn {
        width: 180px; padding: 20px; font-size: 1.1rem; font-weight: bold;
        text-transform: uppercase; background: white; color: black; border: none;
        cursor: pointer; border-radius: 10px; transition: 0.3s;
      }
      .main-btn:hover { background: #00d4ff; transform: scale(1.05); }
      .back-btn { position: absolute; top: 30px; left: 30px; color: white; font-size: 2.5rem; cursor: pointer; background: none; border: none; }
      
      /* KODE BARU: Membuat tombol MERAKIT memenuhi baris kedua secara penuh */
.btn-merakit-full {
  grid-column: span 2;
  width: 100% !important; /* Memaksa tombol melebar seukuran kontainer grid */
}

      /* Sembunyikan semua halaman materi secara default */
      .halaman-materi {
        display: none;
      }

      /* Hanya tampilkan halaman yang memiliki class active */
      .active {
        display: block;
      }

      /* Container untuk area scroll tabel */
      .table-scroll {
        height: 350px;
        overflow-y: auto;
        margin-top: 15px;
        padding-right: 10px;
      }

      /* Navigasi tombol di bagian bawah */
      .nav-footer {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: 20px;
        gap: 15px;
      }

      .page-indicator {
        font-size: 0.9rem;
        color: #00d4ff;
      }

      /* STYLE MATERI & KUIS */
      #menu-materi, #menu-kuis { 
        background: rgba(0, 20, 40, 0.9); 
        display: none; 
      }

      .content-box {
        width: 85%; max-width: 800px;
        background: rgba(255, 255, 255, 0.05);
        border: 2px solid #00d4ff;
        border-radius: 15px;
        padding: 40px;
        backdrop-filter: blur(10px);
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        text-align: center;
      }

      .header-title {
        font-size: 2rem; font-weight: bold; color: #00d4ff;
        margin-bottom: 30px; text-transform: uppercase; letter-spacing: 3px;
      }

      /* Kuis Options */
      .quiz-options {
        display: flex; flex-direction: column; gap: 15px; margin-top: 20px;
      }
      .opt-btn {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid #00d4ff;
        color: white;
        padding: 15px;
        border-radius: 8px;
        cursor: pointer;
        text-align: left;
        font-size: 1.1rem;
        transition: 0.2s;
      }
      .opt-btn:hover { background: rgba(0, 212, 255, 0.3); }
      .opt-btn.selected { background: #00d4ff; color: black; font-weight: bold; }

      .nav-footer {
          display: flex;
          justify-content: space-between;
          align-items: center;
          margin-top: 30px;
          padding: 0 20px; /* Tambahkan padding kiri-kanan agar tombol tidak mentok */
      } 
      #btnNextQuiz {
          width: auto; /* Biarkan lebar menyesuaikan teks */
          min-width: 150px; /* Batas minimal lebar agar tidak terlalu kecil */
          padding: 10px 20px; /* Perkecil padding atas-bawah jika teks terpotong */
          font-size: 0.9rem; /* Perkecil sedikit ukuran huruf dari 1.1rem ke 0.9rem */
          display: flex;
          justify-content: center;
          align-items: center;
          white-space: nowrap; /* Mencegah teks turun ke bawah (wrap) */
      }

      .halaman-materi { display: none; }
      .active { display: block; }