:root{--accent:#cc0030;--ink:#262626;--line:#d9d9d9;--soft:#f8f8f8;--document-bg:#f4f5f5;--document-panel-bg:#fff;--document-text:#262626;--document-border:#d9d9d9;--document-spinner:#cc0030;--document-spinner-track:#d9d9d9}*{box-sizing:border-box}body{color:var(--ink);background:#f4f5f5;margin:0;font-family:Arial,Helvetica,sans-serif}.message-view{background:var(--document-bg);color:var(--document-text);align-items:center;min-height:100vh;padding:18px;display:flex}section{background:var(--document-panel-bg);border:1px solid var(--document-border);text-align:center;border-radius:8px;width:100%;max-width:520px;margin:0 auto;padding:28px;box-shadow:0 1px 3px #0000000f}h1{margin:0;font-size:22px;line-height:1.35}.spinner{border:3px solid var(--document-spinner-track);border-top-color:var(--document-spinner);border-radius:50%;width:34px;height:34px;margin-bottom:18px;animation:.8s linear infinite spin;display:inline-block}.document-view{height:100vh;display:grid}.document-view iframe{border:0;width:100%;height:100%}@keyframes spin{to{transform:rotate(360deg)}}