*{box-sizing:border-box}body{margin:0;background:#f4f6f9;color:#1f2937;font-family:Arial,sans-serif}
.app{display:flex;min-height:100vh}.sidebar{width:240px;background:#111827;padding:22px 14px;color:#fff}.sidebar h2{font-size:20px;padding:0 10px 18px;margin:0 0 12px;border-bottom:1px solid #374151}
.sidebar a{display:block;color:#d1d5db;text-decoration:none;padding:11px 12px;border-radius:8px;margin:4px 0}.sidebar a:hover,.sidebar a.active{background:#2563eb;color:#fff}
.main{flex:1;padding:28px}.card{background:#fff;border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 2px 14px rgba(0,0,0,.05)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat h3{font-size:28px;margin:8px 0}.muted{color:#6b7280}
input,select,textarea{width:100%;padding:11px;border:1px solid #d1d5db;border-radius:8px;margin:6px 0 14px;font-size:14px}
button,.btn{display:inline-block;background:#2563eb;color:#fff;border:0;padding:10px 16px;border-radius:8px;text-decoration:none;cursor:pointer}.btn.secondary{background:#6b7280}.btn.danger{background:#dc2626}.btn.success{background:#16a34a}
table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:11px;border-bottom:1px solid #e5e7eb;text-align:left;font-size:14px}th{background:#f9fafb}
.badge{padding:4px 8px;border-radius:20px;background:#e5e7eb;font-size:12px}.alert{padding:12px;border-radius:8px;margin-bottom:15px}.alert.success{background:#dcfce7;color:#166534}.alert.error{background:#fee2e2;color:#991b1b}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:430px;background:#fff;padding:30px;border-radius:14px;box-shadow:0 10px 35px rgba(0,0,0,.08)}
.actions{display:flex;gap:8px;flex-wrap:wrap}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.sidebar{width:200px}}@media(max-width:650px){.app{display:block}.sidebar{width:100%;min-height:auto}.main{padding:15px}.grid,.form-grid{grid-template-columns:1fr}.card{overflow:auto}}