:root{--app-bg: #f5f6fa;--app-sidebar-bg: #1e293b;--app-sidebar-active: #4f46e5;--app-text: #1f2937;--app-text-muted: #6b7280;--app-border: #e5e7eb;--app-radius: 12px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--app-bg);color:var(--app-text);-webkit-font-smoothing:antialiased}#app{min-height:100vh}a{color:inherit;text-decoration:none}