:root{font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:#21324f;background:radial-gradient(circle at 10% 10%,#eef5ff 0,#f8fbff 45%,#fff)}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input,select{font:inherit}.app-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,#0d2a53,#163f74);color:#e8f0ff;padding:22px 16px;display:flex;flex-direction:column;gap:10px}.sidebar h1{margin:0;font-size:20px}.identity{margin:0 0 10px;color:#aac2ec;font-size:13px}.menu-btn{border:0;border-radius:10px;text-align:left;padding:10px 12px;cursor:pointer;color:#edf3ff;background:#ffffff12}.menu-btn.active{background:#55a1ff59}.menu-btn.danger{margin-top:auto;background:#ff5c5c47}.content{padding:24px}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.panel-header h2{margin:0}.toolbar{display:flex;gap:8px}input,select{background:#fff;border:1px solid #d2e0f5;border-radius:10px;padding:8px 10px}button{background:#1d67e0;color:#fff;border:0;border-radius:10px;padding:8px 12px;cursor:pointer}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.stat-card,table{background:#fff;border:1px solid #dbe7f7;border-radius:14px}.stat-card{padding:14px}.stat-card h3{margin:0;font-size:14px;color:#5f7498}.stat-card p{margin:8px 0 0;font-size:24px;font-weight:700;color:#153c73}table{width:100%;border-collapse:collapse;overflow:hidden}th,td{padding:10px 12px;border-bottom:1px solid #edf2fb;text-align:left;font-size:14px}th{background:#f6f9ff;color:#44608d}tr:last-child td{border-bottom:0}.login-shell{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:100%;max-width:420px;background:#fff;border:1px solid #dbe7f7;border-radius:18px;padding:24px;display:flex;flex-direction:column;gap:12px}.login-card h1{margin:0;font-size:24px}.login-card p{margin:0;color:#60718f}.login-card label{display:flex;flex-direction:column;gap:6px;color:#42587d;font-size:14px}.error-banner{background:#ffecee;border:1px solid #ffb7c0;color:#9d2434;border-radius:10px;padding:8px 10px;font-size:13px}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{gap:6px}.content{padding:14px}.panel-header{flex-direction:column;align-items:flex-start;gap:10px}}