* {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
  }

  html, body {
    height: 100%;
    margin: 0;
  }

  /* HEADER */
    header {
        height: 70px;
        background: linear-gradient(#222, #111);
        display: flex;
        align-items: center;
        padding: 0 40px;
    }

    .header-left {
        display: flex;
        align-items: center;
        z-index: 2;
    }

    .logo {
        display: block;
    }

    .header-line {
        flex: 1;
        height: 2px;
        background: #b30000;
        margin-left: 30px; /* distanza dal logo */
    }

  header strong {
    font-size: 20px;
    letter-spacing: 1px;
  }

  header strong span {
    color: #b30000;
  }

  /* CONTENITORE PRINCIPALE */
  .page {
    height: calc(100% - 70px);
    background: url("background.jpg") no-repeat center center / cover;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* BOX CENTRALE */
  .box {
    background: #fff;
    padding: 40px 50px;
    width: 460px;
    max-width: 90%;
    border-radius: 6px;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
  }

  .box h2 {
    margin: 0 0 25px;
    font-size: 18px;
    color: #333;
  }

  .box input {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-bottom: 25px;
  }

  button, input[type='button'] {
    background: #c00000;
    color: #fff;
    border: none;
    padding: 12px 30px;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
  }

  button:hover, input[type='button']:hover {
    background: #a00000;
  }

  .pdflink {
    text-decoration: none;
    color: black;
    font-weight: 900;
  }

  .box-large {
    width: 700px;
  }