body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f9f9f9;
      color: #333;
    }

    .calculator-box {
      max-width: 600px;
      margin: 50px auto;
      background-color: #fff;
      border-radius: 15px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
      padding: 30px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .calculator-box:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    }

    h2 {
      text-align: center;
      color: #4caf50;
      font-size: 28px;
      margin-bottom: 20px;
    }

    label {
      display: block;
      margin-bottom: 10px;
      font-size: 18px;
      color: #555;
    }

    input,
    select {
      width: 100%;
      padding: 12px;
      margin-bottom: 20px;
      border: 1px solid #ddd;
      border-radius: 8px;
      font-size: 16px;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    input:focus,
    select:focus {
      border-color: #4caf50;
      outline: none;
      box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
    }

    button {
      width: 100%;
      padding: 15px;
      font-size: 18px;
      font-weight: bold;
      color: #fff;
      background-color: #4caf50;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    button:hover {
      background-color: #45a049;
      transform: translateY(-2px);
    }

    button:active {
      transform: translateY(0);
    }

    /* Modalni prozor */
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5);
      overflow: auto;
      padding-top: 60px;
    }

    .modal-content {
      background-color: #fff;
      margin: 5% auto;
      padding: 25px;
      border-radius: 15px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      width: 90%;
      max-width: 600px;
      animation: slideIn 0.3s ease;
    }

    @keyframes slideIn {
      from {
        transform: translateY(-50px);
        opacity: 0;
      }
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .close {
      color: #aaa;
      float: right;
      font-size: 28px;
      font-weight: bold;
      cursor: pointer;
      transition: color 0.3s ease;
    }

    .close:hover {
      color: #333;
    }

    /* Tabela */
    #modal-price-list table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 20px;
    }

    #modal-price-list th,
    #modal-price-list td {
      padding: 12px;
      text-align: left;
      font-size: 16px;
      border-bottom: 1px solid #ddd;
    }

    #modal-price-list th {
      background-color: #4caf50;
      color: #fff;
      font-weight: bold;
    }

    #modal-price-list tr:hover {
      background-color: #f5f5f5;
    }

    /* Rezultat */
    #modal-result {
      margin-top: 20px;
      padding: 15px;
      background-color: #4caf50;
      color: #fff;
      border-radius: 8px;
      text-align: center;
      font-size: 20px;
      font-weight: bold;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

    /* Dugme za zatvaranje */
#close-btn {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  font-weight: bold;
  color: #fff;
  background-color: #4caf50;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-top: 20px; /* Dodajemo razmak iznad dugmeta */
}

    #close-btn:hover {
      background-color: #45a049;
    }

    /* Dodatne informacije */
    #additional-info {
      margin-top: 20px;
      padding: 15px;
      background-color: #f5f5f5;
      border-radius: 8px;
      font-size: 16px;
      color: #555;
    }

    #additional-info h3 {
      margin: 0;
      font-size: 16px;
      line-height: 1.6;
    }