:root{--bg: #f5f5f7;--surface: #ffffff;--border: #d2d2d7;--text: #1d1d1f;--muted: #6b7280;--primary: #0066cc;--danger: #dc2626}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--text);background:var(--bg)}input,button{font:inherit}.center-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.app-shell{min-height:100vh;display:grid;grid-template-columns:280px 1fr}.sidebar{border-right:1px solid var(--border);background:#fafafc;padding:16px;display:flex;flex-direction:column;gap:12px}.brand{font-size:18px;font-weight:800}.role-chip{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef2ff;width:fit-content;font-weight:700;font-size:12px}.nav{display:grid;gap:6px}.nav-link{padding:10px 12px;border-radius:10px;text-decoration:none;color:#374151;font-size:14px;font-weight:600}.nav-link.active{background:var(--surface);border:1px solid var(--border);color:var(--primary)}.content{padding:24px}.stack{display:grid;gap:16px}.grid2{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}.card{border:1px solid var(--border);background:var(--surface);border-radius:16px;padding:16px;display:grid;gap:12px}.btn{background:var(--primary);color:#fff;border:none;border-radius:10px;padding:10px 14px;font-weight:700;width:fit-content;cursor:pointer}.btn-danger{background:var(--danger)}.muted{color:var(--muted);font-size:13px}.metric{margin:0;font-size:28px;font-weight:800}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--border);text-align:left;padding:10px 8px;font-size:14px}@media(max-width:1024px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;top:0;z-index:10}.grid2{grid-template-columns:1fr}}