:root{--bg:#f1f3f6;--surface:#fff;--border:#dfe3ea;--text:#1f2937;--muted:#6b7280;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-soft:#e8f0fe;--danger:#b91c1c;--danger-soft:#fdecec;--warning-soft:#fff6db;--radius:8px;--shadow:0 1px 2px #1018280f, 0 1px 3px #1018281a;color:var(--text);background:var(--bg);font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{background:var(--bg);margin:0}button,input,select{font:inherit;color:inherit}code{background:#eef1f5;border-radius:4px;padding:.1em .35em;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:.9em}.muted{color:var(--muted)}.small{font-size:13px}.page-loading,.center-message{min-height:60vh;color:var(--muted);text-align:center;align-content:center;place-items:center;gap:12px;padding:16px;display:grid}.center-message h1{color:var(--text);margin:0;font-size:22px}.btn{border:1px solid 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