body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background: #f4f4f9;
    }
    header {
      background: #2c3e50;
      color: white;
      padding: 15px;
      text-align: center;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
    }
    main {
      margin-top: 180px;
      padding: 20px;
    }
    main h2 {
      margin-top: 0;
      padding-top: 10px;
    }

    header h1 { margin: 0; }
    nav ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      justify-content: center;
      flex-wrap: wrap; /* ✅ co giãn menu */
    }
    nav ul li { margin: 5px 10px; }
    nav ul li a { color: white; text-decoration: none; }

    .page { display: none; padding: 20px;  }
    .page.active { display: block; }

    form { display: flex; flex-direction: column; max-width: 400px; }
    form input, form textarea { margin-bottom: 10px; padding: 8px; }
    button {
      padding: 10px; background: #27ae60; border: none; color: white; cursor: pointer;
    }
    button:hover { background: #2ecc71; }

    .job-card {
      background: white;
      border: 1px solid #ddd;
      margin-bottom: 15px;
      padding: 15px;
      border-radius: 5px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    }
    .job-card h3 {
      font-size: 18px;
      margin-top: 0;
    }

    #loading {
      font-style: italic;
      color: #555;
    }

    /* Banner */
.cta-banner {
  background: linear-gradient(90deg, #ff9800, #ff5722);
  color: white;
  text-align: center;
  padding: 12px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 6px;
  margin: 15px auto;
  max-width: 900px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  animation: pulse 2s infinite;
}

/* Link bên trong banner */
.cta-banner a.reward-link {
  color: #fff;
  text-decoration: underline;
  font-weight: bold;
  transition: color 0.3s;
}

.cta-banner a.reward-link:hover {
  color: #ffeb3b; /* vàng khi hover */
}

/* Hiệu ứng nhịp */
@keyframes pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.03); }
  100% { transform: scale(1); }
}


  #home h2 {
  position: fixed;
  top: 170px; /* điều chỉnh để nằm ngay dưới header + banner */
  left: 20px; /* canh lề trái bằng với padding của main/job-list */
  margin: 0;
  padding: 10px 20px;
  background: linear-gradient(90deg, #27ae60, #2ecc71);
  color: white;
  font-size: 20px;
  font-weight: bold;
  text-align: left;
  z-index: 900;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  border-radius: 6px;
  width: fit-content; /* chỉ ôm chữ, không full ngang */
  max-width: 25%;     /* giới hạn bề ngang khoảng 25% màn hình */
}


#home {
  padding-top: 80px; /* đẩy nội dung xuống dưới h2 */
}

    #home {
  padding-top: 70px; /* chừa chỗ cho h2 cố định */
}


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

    /* Thanh liên hệ */
    .contact-bar {
      position: fixed;
      top: 50%;
      right: 10px;
      transform: translateY(-50%);
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 1001;
    }
    .contact-bar a {
      background: #2c3e50;
      color: white;
      font-size: 22px;
      text-align: center;
      padding: 12px;
      border-radius: 50%;
      text-decoration: none;
      box-shadow: 0 4px 6px rgba(0,0,0,0.2);
      transition: background 0.3s, transform 0.2s;
    }
    .contact-bar a:hover {
      background: #27ae60;
      transform: scale(1.1);
    }

    /* ✅ Responsive cho tablet/mobile */
    @media (max-width: 768px) {
      main {
        margin-top: 200px; /* đẩy thêm vì banner/menu cao */
        padding: 15px;
      }
      .cta-banner {
        font-size: 16px;
        padding: 10px;
        margin: 10px;
      }
      .contact-bar {
        flex-direction: row;
        bottom: 10px;
        top: auto;
        right: 50%;
        transform: translateX(50%);
      }
    }

    @media (max-width: 480px) {
      header h1 { font-size: 20px; }
      .cta-banner { font-size: 14px; padding: 8px; }
      button { font-size: 14px; padding: 8px; }
      .job-card h3 { font-size: 16px; }
    }