:root{--bg:#f5f6f8;--surface:#fff;--border:#d9dce1;--text:#1c1f24;--text-muted:#6b7280;--accent:#2f6feb;--accent-contrast:#fff;--error-bg:#fdeceb;--error-border:#e5534b;--error-text:#8a1f16;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:system-ui,Segoe UI,Roboto,sans-serif}:root[data-theme=dark]{--bg:#14161a;--surface:#1b1e24;--border:#2e333c;--text:#e6e8eb;--text-muted:#9aa1ac;--accent:#5b9dff;--accent-contrast:#0b1220;--error-bg:#3a1c1c;--error-border:#e5534b;--error-text:#ffb4ac;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}.app{flex-direction:column;gap:16px;max-width:1200px;min-height:100svh;margin:0 auto;padding:16px 20px 40px;display:flex}.site-header{align-items:center;gap:10px;margin-bottom:4px;display:flex}.site-header__brand{color:var(--accent);white-space:nowrap;font-size:15px;font-weight:700;text-decoration:none}.site-header__brand:hover{text-decoration:underline}.site-header__divider{color:var(--text-muted);font-weight:400}.site-header__title{color:var(--text-muted);white-space:nowrap;font-size:15px;font-weight:600}.toolbar-spacer{flex:1}.btn,.toggle-btn{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:6px;padding:6px 12px;font-size:13px}.btn:hover,.toggle-btn:hover{border-color:var(--accent)}.btn--active{border-color:var(--accent);background:var(--accent);color:var(--accent-contrast)}.icon-btn{padding:6px 10px}.toolbar{background:var(--surface);border:1px solid var(--border);border-radius:8px;flex-wrap:wrap;align-items:center;gap:10px;padding:10px 12px;display:flex}.direction-toggle{gap:6px;display:flex}.field{color:var(--text-muted);align-items:center;gap:6px;font-size:13px;display:flex}.field select{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:6px;padding:5px 8px;font-size:13px}.field--checkbox{cursor:pointer}.error-banner{background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text);border-radius:8px;padding:10px 14px;font-size:14px}.panels{flex:1;grid-template-columns:1fr 1fr;gap:16px;min-height:420px;display:grid}@media (width<=800px){.panels{grid-template-columns:1fr}}.panel{background:var(--surface);border:1px solid var(--border);border-radius:8px;flex-direction:column;gap:8px;min-height:0;padding:12px;display:flex}.panel__header{justify-content:space-between;align-items:center;display:flex}.panel__title{color:var(--text-muted);margin:0;font-size:14px;font-weight:600}.panel__textarea{resize:vertical;border:1px solid var(--border);background:var(--bg);min-height:320px;color:var(--text);border-radius:6px;flex:1;padding:10px;font-family:ui-monospace,Consolas,monospace;font-size:13px;line-height:1.5}.file-dropzone{border:1px dashed var(--border);text-align:center;color:var(--text-muted);cursor:pointer;border-radius:6px;padding:10px;font-size:12px}.file-dropzone:hover,.file-dropzone--active{border-color:var(--accent);color:var(--accent)}.table-wrapper{border:1px solid var(--border);background:var(--bg);border-radius:6px;flex:1;min-height:320px;overflow:auto}.preview-table{border-collapse:collapse;width:100%;font-size:12px}.preview-table td{border:1px solid var(--border);white-space:nowrap;padding:4px 8px}.preview-table tr:first-child td{background:var(--surface);font-weight:600}