:root{--ink:#17201d;--muted:#6e7873;--line:#e3e8e5;--green:#12a96a;--green-dark:#087849;--surface:#fff;--canvas:#f4f6f5;--danger:#b74e3a;--reader-size:19px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;color:var(--ink);background:var(--canvas);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;letter-spacing:0}button,input,textarea{font:inherit;letter-spacing:0}button{color:inherit;cursor:pointer}.topbar{height:58px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:9px;border:0;background:none}.brand span{width:31px;height:31px;display:grid;place-items:center;color:#fff;background:var(--ink);border-radius:6px;font-weight:800}.connection{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px}.connection i{width:7px;height:7px;border-radius:50%;background:#aeb6b2}.connection.online i{background:var(--green)}.icon-button{width:38px;height:38px;border:0;background:transparent;border-radius:50%;font-size:18px}.icon-button:hover{background:#eef1ef}main{min-height:calc(100vh - 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