:root{--bg: #f6f7f9;--card: #ffffff;--text: #1a1d23;--muted: #5f6672;--faint: #8a909b;--border: #e3e6eb;--accent: #1d4ed8;--accent-bg: #e8effd;--danger: #b42318;--danger-bg: #fdecea;--warn: #8a5300;--warn-bg: #fff4de;--ok: #1b6b3a;--ok-bg: #e6f4ea;--radius: 10px;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,sans-serif;font-size:15px;line-height:1.45}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3{margin:0;font-weight:600}h2{font-size:18px}h3{font-size:15px}.topbar{position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--border)}.topbar-inner{max-width:900px;margin:0 auto;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px}.brand{display:flex;align-items:center;gap:8px;font-weight:600}.brand 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