:root{--primary-color:#2563eb;--bg-color:#f8fafc;--text-color:#0f172a;--border-color:#e2e8f0;--sidebar-width:250px}body{background-color:var(--bg-color);color:var(--text-color);margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);color:#fff;background-color:#1e293b;padding:20px}.sidebar h2{border-bottom:1px solid #334155;margin-top:0;padding-bottom:20px}.sidebar ul{padding:0;list-style:none}.sidebar li{margin-bottom:10px}.sidebar a{color:#cbd5e1;border-radius:4px;padding:8px 12px;font-weight:500;text-decoration:none;transition:all .2s;display:block}.sidebar a:hover{color:#fff;background-color:#334155}.content{flex-direction:column;flex:1;display:flex}header{border-bottom:1px solid var(--border-color);background:#fff;justify-content:space-between;align-items:center;padding:20px 30px;display:flex}.page{padding:30px}.data-table{border-collapse:collapse;background:#fff;border-radius:8px;width:100%;overflow:hidden;box-shadow:0 1px 3px #0000001a}.data-table th,.data-table td{text-align:left;border-bottom:1px solid var(--border-color);padding:12px 15px}.data-table th{color:#475569;background-color:#f1f5f9;font-weight:600}.data-table tbody tr:hover{background-color:#f8fafc}.login-page{background-color:#f1f5f9;justify-content:center;align-items:center;min-height:100vh;display:flex}.login-form{background:#fff;border-radius:8px;flex-direction:column;gap:15px;width:100%;max-width:400px;padding:40px;display:flex;box-shadow:0 4px 6px #0000001a}.login-form input{border:1px solid var(--border-color);border-radius:4px;padding:10px 15px;font-size:16px}.login-form button{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:4px;padding:12px;font-size:16px;font-weight:600;transition:background-color .2s}.login-form button:hover{background-color:#1d4ed8}.error{color:#ef4444;background:#fee2e2;border-radius:4px;padding:10px;font-size:14px}