:root{--um-bg: #ffffff;--um-fg: #1a1a1a;--um-muted: #666666;--um-border: #d0d0d0;--um-aqua: aqua;--um-aqua-text: #042a2a;--um-hover: #f0fbfb}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.45;color:var(--um-fg);background:var(--um-bg)}#root{min-height:100vh}.app-root{max-width:960px;margin:0 auto;padding:16px 18px 28px}.app-title{margin:0 0 6px;font-size:1.25rem;font-weight:600}.app-note{margin:0 0 14px;color:var(--um-muted);font-size:.85rem}.tabs{display:flex;flex-wrap:wrap;gap:0;border-bottom:1px solid var(--um-border);margin-bottom:14px}.tab{padding:8px 14px;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;background:transparent;color:var(--um-muted);cursor:pointer;font:inherit}.tab[aria-selected=true]{color:var(--um-aqua-text);border-bottom-color:var(--um-aqua);font-weight:600}.section{margin-bottom:16px}.section h2{margin:0 0 6px;font-size:.95rem;font-weight:600}.field-label{display:block;margin-bottom:4px;color:var(--um-muted);font-size:.82rem}.mono-area{display:block;width:100%;min-height:140px;padding:8px 10px;border:1px solid var(--um-border);border-radius:0;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:12px;line-height:1.4;resize:vertical;background:var(--um-bg);color:var(--um-fg)}.mono-area:focus{outline:2px solid var(--um-aqua);outline-offset:1px}.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:8px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:6px 12px;border:1px solid var(--um-border);border-radius:4px;background:var(--um-bg);color:var(--um-fg);font:inherit;cursor:pointer}.btn:hover{background:var(--um-hover)}.btn-primary{border-color:transparent;background:var(--um-aqua);color:var(--um-aqua-text);font-weight:600}.btn-primary:hover{filter:brightness(.97)}.warnings{margin:8px 0 0;padding:8px 10px;border:1px solid var(--um-border);background:#fafafa;font-size:.82rem;color:var(--um-muted)}.warnings li{margin:2px 0}.divider{height:1px;background:var(--um-border);margin:18px 0}.license{margin-top:20px;padding-top:12px;border-top:1px solid var(--um-border);font-size:.78rem;color:var(--um-muted)}.license a{color:var(--um-aqua-text)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}