body { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; background: #f7f8fb; color: #1f2937; }
.sidebar { background: #fff; border-right: 1px solid #e5e7eb; padding: 24px; }
.sidebar a { display: block; padding: 10px 12px; border-radius: 8px; color: #4b5563; text-decoration: none; margin-bottom: 4px; }
.sidebar a:hover, .sidebar a.active { background: #eef5ff; color: #0f63d8; }
.content { padding: 28px 34px; }
.metric { background: white; border: 1px solid #e5e7eb; border-radius: 8px; padding: 18px; }
.metric span { display: block; font-size: 28px; font-weight: 700; color: #111827; }
.metric p { margin: 4px 0 0; color: #6b7280; font-size: 14px; }
.btn { background: #3483fa; color: white; border-radius: 8px; padding: 10px 14px; font-weight: 600; }
.panel { background: white; border: 1px solid #e5e7eb; border-radius: 8px; padding: 18px; }