:root{--bg: #fafaf7;--fg: #1a1a1a;--muted: #666;--border: #e0e0dd;--accent: #1a1a1a;--accent-fg: #ffffff;--success: #2d7a3e;--error: #b13a3a;--warn: #b88600;--radius: 6px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--mono: ui-monospace, "SF Mono", Menlo, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:15px;line-height:1.5}#app{max-width:720px;margin:0 auto;padding:48px 24px 80px}h1{font-size:24px;font-weight:600;margin:0 0 4px;letter-spacing:-.01em}h1 .subtitle{font-weight:400;color:var(--muted);margin-left:8px}h2{font-size:16px;font-weight:600;margin:32px 0 12px}p{margin:0 0 12px}.muted{color:var(--muted);font-size:13px}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}.field{display:block;margin-bottom:12px}.field label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:var(--muted)}input[type=text],input[type=password],select,textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius);font-family:inherit;font-size:14px;background:#fff;color:var(--fg)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--fg)}textarea{font-family:var(--mono);font-size:13px;resize:vertical;min-height:100px}button{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-fg);border-radius:var(--radius);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer}button:hover:not(:disabled){opacity:.9}button:disabled{opacity:.4;cursor:not-allowed}button.secondary{background:transparent;color:var(--fg)}button.danger{background:transparent;color:var(--error);border-color:var(--error)}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:32px;text-align:center;cursor:pointer;transition:border-color .15s;background:#fff}.dropzone:hover,.dropzone.dragover{border-color:var(--fg)}.dropzone p{margin:0;color:var(--muted);font-size:14px}.dropzone strong{color:var(--fg);font-weight:500}.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.progress{margin-top:8px;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-bar{height:100%;background:var(--accent);transition:width .2s}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:16px 0}.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:12px;text-align:center}.stat-value{font-size:22px;font-weight:600;font-variant-numeric:tabular-nums}.stat-label{font-size:12px;color:var(--muted);margin-top:2px}.banner{padding:12px 16px;border-radius:var(--radius);font-size:13px;margin-bottom:12px}.banner.warn{background:#fff8e8;border:1px solid #f0d490;color:#6b5500}.banner.error{background:#fce8e8;border:1px solid #f0a4a4;color:var(--error)}.banner.success{background:#e8f5ec;border:1px solid #9ec9a8;color:var(--success)}.log{max-height:240px;overflow-y:auto;font-family:var(--mono);font-size:12px;background:#f5f5f2;border:1px solid var(--border);border-radius:var(--radius);padding:12px;margin-top:12px}.log-entry{margin:0;padding:2px 0}.log-entry.error{color:var(--error)}.log-entry.warn{color:var(--warn)}.button-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.checkpoint-list{list-style:none;padding:0;margin:0}.checkpoint-list li{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}.checkpoint-list li:last-child{border-bottom:none}.hidden{display:none}.lang-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}