:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;--color-bg: #0f172a;--color-card: #1e293b;--color-sidebar: #131c31;--color-text: #e2e8f0;--color-primary: #38bdf8;--color-border: #334155;--color-error: #f43f5e}body{margin:0;background-color:var(--color-bg);color:var(--color-text)}.App{display:flex;height:100vh;width:100vw}.Sidebar{width:250px;background-color:var(--color-sidebar);border-right:1px solid var(--color-border);padding:1rem;display:flex;flex-direction:column}.Sidebar h2{margin-top:0;color:var(--color-primary);border-bottom:1px solid var(--color-border);padding-bottom:.5rem}.Sidebar-list{list-style-type:none;padding:0;margin:0;flex-grow:1;overflow-y:auto}.Sidebar-item{padding:.75rem .5rem;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color .2s 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