* { margin: 0; padding: 0; box-sizing: border-box; }
    
    html, body {
      width: 100%;
      height: 100%;
      margin: 0;
      padding: 0;
      overflow: hidden;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
      background: #000;
      color: #fff;
      min-height: 100dvh;
    }

    #bg-video { 
      position: fixed; 
      inset: 0; 
      width: 100%; 
      height: 100dvh; 
      object-fit: cover; 
      z-index: 1; 
    }
    .overlay {
      position: fixed; inset: 0;
      background: linear-gradient(to bottom, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.75) 60%, rgba(0,0,0,0.92) 100%);
      z-index: 2;
    }

    .header {
      position: fixed; top: 0; left: 0; right: 0; height: 60px;
      background: #075E54; color: white;
      display: flex; align-items: center; padding: 0 16px; z-index: 100;
      font-weight: 500; gap: 12px;
    }
    .back-arrow { font-size: 24px; transform: scaleX(-1); }

    .container {
      position: relative; z-index: 10;
      min-height: 100dvh;
      display: flex; flex-direction: column; align-items: center;
      padding: 80px 20px 40px;
      text-align: center;
    }

    .group-icon {
      width: 110px; height: 110px; border-radius: 50%; overflow: hidden;
      border: 6px solid rgba(255,255,255,0.25); margin-bottom: 16px; background: #111;
    }
    .group-icon img { width: 100%; height: 100%; object-fit: cover; }

    .group-name { font-size: 28px; font-weight: bold; margin-bottom: 8px; }
    .admin-text { color: #c1c1c1; font-size: 15px; margin-bottom: 24px; }

    .stats {
      display: flex; justify-content: center; gap: 60px; margin: 24px 0 32px 0;
    }
    .stat-item { text-align: center; }
    .stat-number {
      font-size: 32px; font-weight: bold; line-height: 1;
      min-width: 120px;
    }
    .stat-label { font-size: 14px; color: #aaa; margin-top: 6px; }
    .online { color: #53d33e; font-weight: 600; }

    .join-btn {
      display: flex; align-items: center; justify-content: center; gap: 12px;
      background: #25D366; color: white; font-size: 19px; font-weight: bold;
      padding: 18px 24px; border-radius: 50px; width: 100%; max-width: 340px;
      text-decoration: none;
      box-shadow: 0 8px 25px rgba(37,213,102,0.4);
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      animation: gentlePulse 3s infinite ease-in-out;
      min-height: 60px;
      margin: 0 auto 16px auto; /* center + jarak ke bawah */
    }
    .join-btn:hover {
      transform: translateY(-4px) scale(1.04);
      box-shadow: 0 16px 40px rgba(37,213,102,0.6);
    }
    .join-btn img { width: 32px; height: 32px; }

    @keyframes gentlePulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.03); }
    }

    .protected { font-size: 13px; color: #ddd; opacity: 0.9; margin-bottom: 20px; }

    /* Responsive */
    @media (max-width: 480px) {
      .container { padding: 70px 16px 30px; }
      .group-icon { width: 90px; height: 90px; }
      .group-name { font-size: 24px; }
      .admin-text { font-size: 14px; }
      .stats { gap: 40px; margin: 20px 0 28px 0; }
      .stat-number { font-size: 28px; min-width: 100px; }
      .join-btn { font-size: 18px; padding: 16px 20px; max-width: 90%; }
    }