:root{--bg: #0f172a;--panel: #1e293b;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #38bdf8;--danger: #ef4444;--ok: #22c55e;--col-left: #2f9de8;--col-right: #e8c32f}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif}#app{height:100vh;height:100dvh;display:flex;align-items:center;justify-content:center}.screen{width:min(92vw,520px);background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:28px}@media(max-width:480px){.screen{padding:18px}}.user-header{position:fixed;top:12px;right:16px;z-index:10;display:flex;align-items:center;padding:4px 12px;background:var(--panel);border:1px solid var(--border);border-radius:999px;font-size:.85rem;color:var(--text)}.user-header-name{font-weight:600}.screen h1{margin:0 0 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