:root{--bg: #ffffff;--bg-soft: #f8fafc;--border: #e2e8f0;--border-soft: #f1f5f9;--text: #0f172a;--text-muted: #64748b;--text-soft: #94a3b8;--indigo: #4f46e5;--indigo-50: #eef2ff;--indigo-100: #e0e7ff;--emerald: #059669;--emerald-50: #ecfdf5;--emerald-100: #d1fae5;--emerald-700: #047857;--rose: #dc2626;--rose-50: #fef2f2;--rose-100: #fee2e2;--rose-700: #be123c;--amber: #d97706;--amber-50: #fffbeb;--amber-100: #fef3c7;--amber-700: #b45309;--slate: #475569;--slate-50: #f8fafc}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}.app{display:flex;min-height:100vh}.sidebar{width:240px;background:#0f172a;color:#cbd5e1;padding:24px 14px;flex-shrink:0;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh}.sidebar .brand{display:flex;gap:10px;align-items:center;font-weight:700;color:#fff;font-size:15px;margin-bottom:2px}.sidebar .brand .dot{width:8px;height:8px;border-radius:2px;background:var(--indigo)}.sidebar .sub{font-size:11.5px;color:#64748b;margin-bottom:24px}.sidebar .group-title{font-size:10.5px;font-weight:600;color:#475569;text-transform:uppercase;letter-spacing:.07em;margin:18px 10px 6px}.nav-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:7px;color:#cbd5e1;font-weight:500;font-size:13.5px;cursor:pointer;transition:all .15s}.nav-item:hover{background:#1e293b;color:#fff}.nav-item.active{background:var(--indigo);color:#fff}.sidebar .footer{margin-top:auto;padding:12px;border-top:1px solid #1e293b;font-size:12px;color:#64748b}.sidebar .footer button{background:transparent;border:1px solid #334155;color:#cbd5e1;padding:6px 10px;border-radius:6px;cursor:pointer;font-size:12px;margin-top:8px;width:100%}.sidebar .footer button:hover{background:#1e293b;color:#fff}.main{flex:1;padding:0;overflow-x:hidden;min-width:0}.login-shell{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#f8fafc,#eef2ff)}.login-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:36px 36px 28px;width:400px;box-shadow:0 8px 28px #0f172a0f}.login-card h1{margin:0 0 8px;font-size:22px;font-weight:700;letter-spacing:-.01em}.login-card .sub{font-size:13px;color:var(--text-muted);margin-bottom:22px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-size:11.5px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.field input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:14px;font-family:inherit}.field input:focus{outline:2px solid var(--indigo);outline-offset:-1px}.btn-primary{background:var(--indigo);color:#fff;border:none;padding:10px 16px;border-radius:8px;font-weight:600;font-size:14px;cursor:pointer;width:100%}.btn-primary:hover{background:#4338ca}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.alert{padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:16px}.alert-error{background:var(--rose-50);color:var(--rose)}.alert-success{background:var(--emerald-50);color:var(--emerald)}.loading-center{display:flex;align-items:center;justify-content:center;height:50vh;color:var(--text-muted);gap:10px}.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--indigo);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}