@font-face {
      /* font-family: 'Vazir'; */
      /* src: url('https://cdn.fontcdn.ir/Font/Persian/Vazir/Vazir.woff') format('woff'); */
    }

    body {
      font-family: 'Vazir', sans-serif;
      margin: 0;
      padding: 0;
    }

    .calculator {
      background-color: #2E53A1;
      padding: 15px;
      border-radius: 25px;
      max-width: 600px;
      width: 90%;
      margin: 0 auto;
      min-width: 300px;
    }

    .display {
      background-color: #ffffff;
      padding: 10px;
      border-radius: 15px;
      margin-bottom: 15px;
      color: #ff6318;
      font-family: 'Vazir', sans-serif;
      font-size: 15px;
      height: 120px;
      overflow-y: auto;
      white-space: normal;
      word-break: break-word;
      line-height: 1.8;
    }

    .options {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 15px;
    }

    select {
      padding: 8px;
      border-radius: 25px;
      border: none;
      font-family: 'Vazir', sans-serif;
      font-size: 14px;
      width: 100%;
    }

    .buttons {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 6px;
    }

    button {
      padding: 10px;
      background-color: #2E53A1;
      color: #ffffff;
      border: none;
      border-radius: 25px;
      font-size: 14px;
      cursor: pointer;
      transition: background-color 0.2s;
    }

    button:hover {
      background-color: #e55a14;
    }

    .clear-btn {
      background-color: #2E53A1;
      color: white;
    }

    .clear-btn:hover {
      background-color: #e55a14;
    }

    .order-btn {
      margin-top: 15px;
      padding: 10px;
      width: calc(100% - 20px);
      background-color: #ff6318;
      color: white;
      text-align: center;
      text-decoration: none;
      display: block;
      border-radius: 25px;
      font-size: 14px;
    }

    .order-btn:hover {
      background-color: #e55a14;
    }

    /* موبایل */
    @media (max-width: 600px) {
      .calculator {
        /* padding: 10px; */
        min-width: 280px;
      }

      .display {
        font-size: 14px;
        padding: 10px;
        height: 80px;
      }

      .options {
        grid-template-columns: 1fr;
        gap: 8px;
      }

      .buttons {
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
      }

      button {
        padding: 8px;
        font-size: 12px;
      }

      .order-btn {
        padding: 8px;
        font-size: 12px;
      }
    }