* { box-sizing: border-box; }
    html,body { height:100%; }
    body {
      font-family: "Poppins", sans-serif;
      margin: 0;
      padding: 0;
      background: #b9cae4;
      color: #333;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100vh;
    }
    header {
      display: flex;
      box-shadow:0 2px 5px rgba(0,0,0,0.2);
      margin-bottom:100px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: #0a54c4;
      color: white;
      width: 100%;           /* ✅ tsy mihoatra ny écran */
      box-sizing: border-box;
      margin: 0;
      padding: 25px 15px;    /* ✅ padding ampy ho an’ny desktop sy mobile */


    }



    header img {
      width: 90px;   
      height: 90px;  
      border-radius: 50%;
      background: rgb(252, 116, 6);
      padding: 8px;
      margin-bottom: 10px;
      
    }

    h1 {
      margin: 0;
      font-size: 1.8em;
    }

    main {
      flex: 1;
      text-align: center;
      padding: 20px;
      background: #eeb6dd;
      max-width: 600px;
      width: 100%;
    }

    .qr-container {
      margin: 30px auto;
    }

    .qr-container img {
      width: 180px;
      height: 180px;
      border: 4px solid #1a73e8;
      border-radius: 15px;
      padding: 8px;
      background: white;
    }

    .btn {
      background: #1a73e8;
      color: white;
      padding: 14px 24px;
      border: none;
      border-radius: 10px;
      font-size: 1.1em;
      cursor: pointer;
      transition: 0.3s;
      text-decoration: none;
      display: inline-block;
      margin-top: 15px;
    }

    .btn:hover {
      background: #0d5fd0;
    }

    .pub {
      margin-top: 40px;
      background: #fff;
      padding: 20px;
      background: #7bee70;
      border-radius: 10px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    }

    footer {
      font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      background: #b9cae4;
      text-align: center;
      padding: 35px;
      color: rgb(12, 35, 240);
      width: 100%;
      font-size: 0.9em;
      margin-top: auto;
    }

    @media (max-width: 600px) {
      header {
        padding: 25px 8px;
      }

      header img {
        width: 90px;   
        height: 90px;  
      }
      h1 {
        font-size: 1.4em;
      }
      .qr-container img {
        width: 150px;
        height: 150px;
      }
    }