:root{--bg:#f2f2f7;--card:#ffffff;--line:#e5e5ea;--line-soft:#eeeeF2;--text:#1c1915;--title:#1d1d1f;--muted:#4a4640;--subtle:#6e6e73;--accent:#c45c26;--accent-soft:#f8ebe3;--panel:#f2f2f7;--green:#1f7a4d;--blue:#2b8ccf;--shadow:0 10px 30px rgba(0,0,0,0.08)}*{box-sizing:border-box}body,html{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:Noto Sans SC,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}button,input{font:inherit}a{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.topbar{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:rgba(255,255,255,.86);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.topbar strong{font-size:16px}.topbar span{margin-left:12px;color:var(--muted);font-size:14px}.shell{display:grid;grid-template-columns:280px minmax(0,1fr) 360px;height:calc(100vh - 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.card{width:100%}.switch{min-height:42px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:8px 12px;background:#fff}.switch+.switch{margin-top:8px}.ui-switch{width:58px;height:28px;position:relative;display:inline-flex;align-items:center;justify-content:flex-end;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--subtle);padding:0 8px;cursor:pointer}.ui-switch span{position:absolute;left:3px;width:22px;height:22px;border-radius:999px;background:var(--line);transition:transform .12s ease,background .12s ease}.ui-switch em{font-style:normal;font-size:12px;line-height:16px;font-weight:500}.ui-switch-on{justify-content:flex-start;border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.ui-switch-on span{background:var(--accent);transform:translateX(30px)}.settings-invites{display:flex;flex-direction:column;gap:8px}.settings-invites 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var(--accent);outline-offset:2px}.item-menu-content{position:absolute;top:100%;right:0;z-index:20;display:flex;flex-direction:column;min-width:152px;padding:4px;background:white;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.item-menu-content .ui-button{justify-content:flex-start}.danger-text{color:#b42318}.message-menu{margin-left:auto}.presence-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--subtle);margin-right:5px}.presence-dot.online{background:var(--green)}.composer-error{padding:4px 16px 12px}