:root{--navy: #12233d;--navy-light: #1c3760;--accent: #2f6fed;--bg: #f4f6f9;--border: #e2e5ea;--text: #1a202c;--text-muted: #6b7280;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--navy);color:#fff;flex-shrink:0;padding:16px 0;overflow-y:auto}.sidebar h1{font-size:16px;padding:0 16px 16px;margin:0;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar .group{padding:12px 16px 4px;font-size:11px;letter-spacing:.05em;color:#9fb0cc;text-transform:uppercase}.sidebar .item{display:block;padding:8px 16px;font-size:14px;color:#d8e0ef;border-left:3px solid transparent}.sidebar .item:hover,.sidebar .item.active{background:var(--navy-light);border-left-color:var(--accent);color:#fff}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:56px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px}.content{padding:20px}.card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase}.btn{display:inline-block;background:var(--accent);color:#fff;border:none;padding:8px 14px;border-radius:6px;font-size:14px;cursor:pointer}.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--border)}input,select,textarea{padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:14px;width:100%}.field{margin-bottom:12px}.field label{display:block;font-size:13px;margin-bottom:4px;color:var(--text-muted)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--navy)}.login-box{background:#fff;padding:32px;border-radius:10px;width:340px}.error-text{color:#d32f2f;font-size:13px;margin-top:8px}