:root{--bg: #fafafa;--surface: #ffffff;--surface-2: #f4f5f7;--surface-3: #f7f8fa;--text: #11181c;--muted: #6b7785;--line: #e6e9ee;--line-strong: #d4d9e0;--accent: #0a7c5a;--accent-2: #0a9c6f;--accent-soft: rgba(10, 124, 90, .08);--warn: #b58a08;--bad: #d4453a;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow: 0 4px 16px rgba(15, 23, 42, .06);--shadow-lg: 0 12px 40px rgba(15, 23, 42, .08);--radius: 10px;--radius-sm: 7px;--radius-lg: 14px;--sidebar-row-font-size: .88rem;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,system-ui,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;width:100vw;height:100dvh;overflow:hidden;background:var(--bg)}button,input,select{font:inherit}button{cursor:pointer}a{text-decoration:none}.app-shell{display:grid;grid-template-columns:272px 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var(--line-strong);border-radius:var(--radius);background:var(--surface-3)}.session-empty strong{display:block;margin-bottom:2px;font-size:.92rem}.sidebar-actions{display:flex;gap:6px}.folder-group{border:1px solid transparent;border-radius:var(--radius-sm);margin:0 -2px 4px;padding:2px;transition:background .12s ease,border-color .12s ease}.folder-group.drop-active{background:var(--accent-soft);border-color:var(--accent)}.folder-group.drop-active .folder-header{background:transparent}.folder-header{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:6px 8px;border-radius:var(--radius-sm);background:var(--surface-2);margin-bottom:4px}.folder-header.unfiled-header{background:transparent;padding:6px 8px 4px}.folder-label{font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:700}.unfiled-header .folder-label{color:var(--muted)}.folder-header 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