{{ block title }}Duplicate Session Detected{{ endblock }}

{{ block content }}
<div style="max-width: 600px; margin: 80px auto; text-align: center; font-family: sans-serif; color: #333;">

    <svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 24 24"
         fill="none" stroke="#e67e22" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"
         style="margin-bottom: 24px;">
        <circle cx="12" cy="12" r="10"/>
        <line x1="12" y1="8" x2="12" y2="12"/>
        <line x1="12" y1="16" x2="12.01" y2="16"/>
    </svg>

    <h2 style="font-size: 1.8rem; margin-bottom: 16px;">Duplicate session detected.</h2>

    <p style="font-size: 1.05rem; line-height: 1.7; margin-bottom: 12px;">
        It looks like your participation link was opened more than once.
        This window has been automatically closed to prevent any issues.
    </p>

    <p style="font-size: 1.05rem; line-height: 1.7; margin-bottom: 32px;">
        Please continue using your <strong>original browser window</strong>.<br>
        If you are unsure which window to use, please raise your hand to inform the experimenter.
    </p>

    <hr style="border: none; border-top: 1px solid #ddd; margin-bottom: 24px;">

    <p style="font-size: 0.9rem; color: #777;">
        If you believe you have reached this page in error, please contact the experimenter.
    </p>

</div>
{{ endblock }}