:root{--bg: #f7f8fa;--card: #ffffff;--border: #e4e6eb;--text: #1e2533;--muted: #6b7280;--accent: #2563eb;--error: #dc2626;--code-bg: #f3f4f6}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5}.page{max-width:800px;margin:0 auto;padding:32px 20px}header h1{margin:0 0 4px;font-size:22px}header .subtitle{margin:0 0 24px;color:var(--muted)}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:16px}.card label{display:block;font-weight:600;margin-bottom:8px}select,textarea,input[type=file]{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:#fff;font-family:inherit;font-size:14px}textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;resize:vertical;margin-top:8px}.meta{display:inline-block;margin-top:8px;font-size:12px;color:var(--muted);text-decoration:none}.meta:hover{color:var(--accent)}button{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:600;cursor:pointer}button:disabled{background:#94a3b8;cursor:not-allowed}button.link{background:none;color:var(--accent);border:0;padding:0;font-size:inherit;font-weight:500;text-decoration:underline;cursor:pointer}button.link:disabled{color:#94a3b8;background:none}.hint{margin:0 0 8px;font-size:13px;color:var(--muted)}.error{margin-top:12px;padding:10px 12px;background:#fef2f2;color:var(--error);border-radius:6px;font-size:13px}code{background:var(--code-bg);padding:2px 5px;border-radius:3px;font-size:13px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:#fff;border-radius:10px;padding:24px;max-width:560px;margin:20px}.modal h2{margin-top:0}.modal ol{padding-left:20px}.modal li{margin-bottom:8px}