:root{--bg:#faf9f7;--surface:#fff;--border:#e5e7eb;--text:#1f2937;--text-muted:#6b7280;--text-faint:#9ca3af;--accent:#2563eb;--accent-hover:#1d4ed8}*{box-sizing:border-box}html,body,#root{background:var(--bg);height:100%;color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5}button{font:inherit;cursor:pointer}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{flex-direction:column;min-height:100%;display:flex}.header{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;padding:12px 24px;display:flex;position:sticky;top:0}.header h1{margin:0;font-size:18px;font-weight:600}.header-actions{align-items:center;gap:12px;display:flex}.signout{border:1px solid var(--border);color:var(--text-muted);background:0 0;border-radius:6px;padding:6px 12px}.signout:hover{color:var(--text);border-color:var(--text-muted)}.main{flex:1;width:100%;max-width:960px;margin:0 auto;padding:24px}.nav-link{border:1px solid var(--border);color:var(--text-muted);border-radius:6px;padding:6px 10px;font-size:13px}.nav-link:hover{color:var(--text);border-color:var(--text-muted);text-decoration:none}.manage-bar{flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;display:flex}.manage-bar label,.add-form label{color:var(--text-muted);flex-direction:column;gap:4px;font-size:12px;display:flex}.manage-bar input[type=date],.add-form input[type=time],.add-form input[type=text],.add-form select{font:inherit;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:6px;padding:6px 8px}.add-form{background:var(--surface);border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:12px;margin-top:24px;padding:16px;display:flex}.add-form 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