:root{--bg:#f6f7fb;--card:#fff;--ink:#0f172a;--muted:#64748b;--brand:#2563eb;--brand2:#1d4ed8;--danger:#dc2626;--side:#0b1222;--sideink:#cbd5f5;--border:#e5e7eb}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit;text-decoration:none}
.sidebar{position:fixed;top:0;bottom:0;left:0;width:260px;background:var(--side);padding:22px;color:#fff}
.brand{font-weight:900;font-size:18px;margin:0 0 14px 0}
.nav a{display:block;color:var(--sideink);padding:10px 12px;border-radius:12px;margin-bottom:6px}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.08);color:#fff}
.main{margin-left:280px;padding:26px}
.header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.h1{font-size:24px;margin:0}
.card{background:var(--card);border:1px solid rgba(15,23,42,.05);border-radius:16px;padding:18px;box-shadow:0 10px 24px rgba(2,6,23,.08);margin-bottom:16px}
.grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:980px){.grid{grid-template-columns:1fr 1fr}}
label{display:block;font-size:12px;color:var(--muted);font-weight:800;margin:10px 0 6px}
input,select,textarea{width:100%;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:#fff;color:var(--ink)}
textarea{min-height:100px;resize:vertical}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border:none;padding:10px 14px;border-radius:12px;font-weight:900;cursor:pointer}
.btn:hover{background:var(--brand2)}
.btn.secondary{background:#111827}
.btn.secondary:hover{background:#0b1222}
.btn.link{background:transparent;color:var(--brand);padding:0}
.badge{display:inline-block;padding:4px 10px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px;font-weight:900}
.badge.gray{background:#f1f5f9;color:#334155}
.notice{padding:10px 12px;border-radius:12px;background:#ecfeff;color:#155e75;font-weight:800}
.error{padding:10px 12px;border-radius:12px;background:#fef2f2;color:#991b1b;font-weight:900}
.small{font-size:12px;color:var(--muted)}
table{width:100%;border-collapse:collapse}
th,td{padding:10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
th{font-size:12px;color:#334155;text-transform:uppercase;letter-spacing:.06em}
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.login-card{max-width:430px;width:100%}

/* Mobile layout */
@media (max-width: 900px){
  .sidebar{position:static;width:auto;border-radius:0;padding:14px}
  .main{margin-left:0;padding:16px}
  .nav a{display:inline-block;margin:4px 6px 0 0}
  .header{margin-top:8px}
  table{display:block;overflow-x:auto}
}