*{box-sizing:border-box}body{color:#111827;background:#f7f8fa;margin:0;font-family:Inter,Arial,sans-serif}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;display:flex}.sidebar{color:#fff;background:#111827;width:260px;padding:20px 16px}.sidebar-title{margin-bottom:24px;font-size:20px;font-weight:700}.sidebar-nav{flex-direction:column;gap:8px;display:flex}.sidebar-link{color:#d1d5db;border-radius:10px;padding:12px 14px}.sidebar-link:hover{color:#fff;background:#1f2937}.main{flex:1;padding:28px}.topbar{background:#fff;border:1px solid #e5e7eb;border-radius:16px;margin-bottom:20px;padding:18px 22px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:22px}.page-title{margin:0;font-size:28px}.page-subtitle{color:#6b7280;margin-top:8px}