:root{--bg: #fff;--bg-soft: #f7f9fb;--text: #273447;--muted: #657286;--line: #e4e9ef;--active: #e4eefc;--accent: #1f5fbe;--danger: #b4403a;--rail: 38px;font:13px/1.5 Segoe UI,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg-soft);font-synthesis:none}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;overflow-x:hidden}h1,h2,h3,p{margin-top:0}h1{font-size:16px;margin:0}h2{font-size:15px;margin-bottom:8px}h3{font-size:13px;margin:18px 0 8px}a{color:var(--accent);text-decoration:none}small,.muted{color:var(--muted);font-size:12px}code{display:block;font-size:11px;overflow-wrap:anywhere;color:var(--muted);margin:8px 0}.pad{padding:10px 12px}.spacer{flex:1}.full{width:100%}button,.button,input,select,textarea{font:inherit}button,.button{min-height:28px;padding:3px 10px;border:1px solid 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0;font-size:12px}.hint{color:var(--muted);font-size:12px}.segmented{display:inline-flex;border:1px solid var(--line);border-radius:4px;overflow:hidden}.segmented button{border:0;border-radius:0;min-height:26px}.segmented button.active{background:var(--active);color:var(--accent)}.app-shell{height:100vh;display:flex;flex-direction:column;min-width:0;background:var(--bg)}.topbar{flex:none;height:38px;display:flex;align-items:center;gap:8px;padding:0 8px;border-bottom:1px solid var(--line);background:var(--bg)}.menubar{display:flex;gap:2px;min-width:0}.menubar .menu-trigger{border-color:transparent;background:transparent;padding:3px 10px}.menubar .menu-trigger[aria-expanded=true]{background:var(--active);color:var(--accent)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.brand-logo{display:block;width:22px;height:22px;flex:none}.busy{color:var(--accent);font-size:12px}.menu-trigger{min-width:28px}.user 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10px;font-size:12px}.notice.error{border-radius:0}.success{background:#edf7f1;color:#2f7b58}.body{position:relative;flex:1;min-height:0;display:flex}.center{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--bg)}.tool-pane{display:flex;flex:none;min-height:0}.tool-pane.right{flex-direction:row-reverse}.tool-rail{width:var(--rail);flex:none;display:flex;flex-direction:column;align-items:center;padding-top:6px;background:var(--bg-soft)}.tool-pane.left .tool-rail{border-right:1px solid var(--line)}.tool-pane.right .tool-rail{border-left:1px solid var(--line)}.rail-button{width:30px;height:30px;padding:0;border-color:transparent;background:transparent;font-size:15px}.rail-button.active{background:var(--active);color:var(--accent)}.tool-panel{width:var(--pane-width);display:flex;flex-direction:column;min-height:0;background:var(--bg)}.tool-header{flex:none;height:34px;display:flex;align-items:center;gap:4px;padding:0 4px 0 10px;border-bottom:1px solid 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0;overflow-wrap:anywhere;color:var(--accent)}.account-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:8px 0}.preview-text{max-height:50vh;overflow:auto;padding:10px;white-space:pre-wrap;background:var(--bg-soft)}.preview-image{max-width:100%;max-height:50vh}@media(max-width:899px){.tool-panel{position:absolute;top:0;bottom:0;z-index:10;width:min(var(--pane-width),calc(100% - 2 * var(--rail)));border:1px solid var(--line);box-shadow:0 2px 8px #27344722}.tool-pane.left .tool-panel{left:var(--rail)}.tool-pane.right .tool-panel{right:var(--rail)}.splitter,.user-name{display:none}}