:root {
      --text-color: #000;
      --mainbag: #fff;
      --value: #7a814ee4;
      --clean: #f00;
      --equal: #2196f3;
      --box-shadow: 2px 2px 19px 14px rgba(0, 0, 0, 0.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #ebecf0;
      height: 100vh;
      font-size: 10px;
    }
    .container {
      max-width: 60%;
      background-color: var(--mainbag);

      border-radius: 6px;
      box-shadow: var(--box-shadow);
    }

    .container span {
      border-radius: 4px;
      box-shadow: 0px 0px 5px 0px rgba(72, 79, 74, 0.9),
        -6px -6px 12px -1px white;
      font-size: 1rem;
      font-weight: bold;
      padding: 0.9rem;
      cursor: pointer;
      text-align: center;
      position: relative;
    }
    .container span:active {
      box-shadow: inset -4px -4px 6px -1px rgba(255, 255, 255, 0.3);
    }
    .form {
      padding: 1rem;
      margin: 3px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0.5rem;
    }
    .form input {
      grid-column: 1/-1;
      padding: 0.9rem;
      background-color: var(--value);
      text-align: right;
      border: 1px solid var(--text-color);
      border-radius: 4px;
      color: var(--text-color);
      font-size: 1rem;
      font-weight: 600;
    }
    .clear {
      background-color: var(--clean);

      grid-column: 1 / -3;
      padding: 0.5rem 1rem;
      box-shadow: none !important;
    }
    .plus {
      grid-column: 4 /5;
      grid-row: 4 /6;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .equal {
      background-color: var(--equal);
    }
    h5 {
      text-align: center;
      font-size: 1rem;
      margin-bottom: 0.5rem;
      font-weight: 0;
      color: rgb(66, 66, 66);
    }
    a:link,
    a:active {
      text-decoration: none;
      color: rgb(66, 66, 66);
    }
    a:hover,
    a:visited {
      border-bottom: 1px solid black;
      color: black;
    }