body {
      font-family: 'Segoe UI', sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f3f4f6;
      color: #111827;
    }

    /* Navbar */
    .navbar {
      background-color: #1f2937;
      padding: 10px 20px;
    }
    .navbar-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      color: white;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 8px;
      text-decoration: none;
    }
    .logo img {
      width: 40px;
      height: 40px;
      object-fit: cover;
      border-radius: 50%;
    }
    .navbar nav {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .navbar nav a {
  color: white;
  text-decoration: none;
  font-size: 1.2rem; /* hoặc dùng 18px */
  padding: 8px 12px;
  transition: 0.3s;
}

    .navbar nav a:hover {
      background-color: #374151;
      border-radius: 6px;
    }

    header {
      background-color: #1f2937;
      color: white;
      text-align: center;
      padding: 30px 20px;
    }
    header h1 {
      margin-bottom: 10px;
    }
    header p {
      font-size: 1.1rem;
      max-width: 800px;
      margin: auto;
    }

    .description {
      max-width: 800px;
      margin: 30px auto;
      text-align: center;
      font-size: 1rem;
      padding: 0 20px;
      color: #374151;
    }

    .org-chart {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 40px;
      padding: 20px;
    }

    .row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
    }

    .card {
      background-color: white;
      width: 260px;
      border-radius: 16px;
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease;
    }

    .card:hover {
      transform: translateY(-5px);
    }

    .card img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }

    .card-body {
      padding: 15px;
    }

    .name {
      font-size: 1.2rem;
      font-weight: bold;
      margin-bottom: 5px;
    }

    .position {
      font-size: 0.95rem;
      color: #6b7280;
      margin-bottom: 10px;
    }

    .contact-info {
      font-size: 0.9rem;
      color: #374151;
      line-height: 1.5;
    }

    .contact-info a {
      color: #1d4ed8;
      text-decoration: none;
    }

    .contact-info a:hover {
      text-decoration: underline;
    }
    .logo img {
  width: 100px;
  height: 100px;
  object-fit: contain;
}


    /* Responsive */
    @media (max-width: 768px) {
      .card {
        width: 90%;
      }

      .card img {
        height: 220px;
      }
    }

    .container {
      max-width: 1200px;
      margin: 40px auto;
      padding: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      justify-content: space-between;
      background: white;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    .contact-form, .contact-info {
      flex: 1;
      min-width: 300px;
    }
    h2 {
      margin-bottom: 20px;
    }
    input, textarea {
      width: 100%;
      padding: 10px;
      margin-bottom: 15px;
      border: 1px solid #ccc;
      border-radius: 6px;
      font-size: 1rem;
    }
    button {
      background-color: #1f2937;
      color: white;
      padding: 10px 16px;
      border: none;
      border-radius: 6px;
      font-size: 1rem;
      cursor: pointer;
      width: 100%;
    }
    button:hover {
      background-color: #1f2937;
    }
    .contact-info address {
      font-style: normal;
      line-height: 1.6;
    }
    iframe {
      width: 100%;
      height: 300px;
      border: none;
      margin-top: 15px;
      border-radius: 8px;
    }
    @media (max-width: 768px) {
      .container {
        flex-direction: column;
      }
    }