:root{
  --navy:#12355b; --blue:#1f5fa8; --bg:#f4f6f8; --panel:#fff; --ink:#15223b;
  --muted:#5a6575; --line:#e2e7ef; --green:#1f8a4c; --red:#c0392b;
  --shadow:0 1px 2px rgba(20,34,59,.06),0 6px 20px rgba(20,34,59,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit;text-decoration:none}

/* ---- login ---- */
.login-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#12355b,#1f5fa8)}
.login-card{background:#fff;padding:34px 30px;border-radius:16px;width:340px;max-width:92vw;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px}
.login-card label{font-size:13px;font-weight:600;margin-top:8px}
.login-card input{padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px}
.brand{font-weight:800;font-size:22px;color:var(--navy);letter-spacing:-.3px}
.brand span{color:var(--blue)}
.brand.big{font-size:30px;text-align:center}
.muted{color:var(--muted)} .small{font-size:12px} .center{text-align:center}

/* ---- layout ---- */
.layout{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--navy);color:#dce6f3;flex:0 0 auto;padding:16px 0}
.sidebar .brand{color:#fff;padding:6px 20px 16px}
.sidebar .brand span{color:#8fc0ff}
.nav-group{padding:14px 20px 4px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#7f97b5}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 20px;color:#cdd9ea;font-size:14px}
.nav-item b{opacity:.6;font-size:12px}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:var(--blue);color:#fff}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.topbar-title{font-weight:700;font-size:18px}
.topbar-user{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--muted)}
.topbar-user em{font-style:normal;color:var(--blue);font-weight:600}
.content{padding:24px;max-width:1100px}

/* ---- cards / tables / forms ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:18px;margin-bottom:18px}
.card.no-pad{padding:0;overflow:hidden}
.card h3{margin:.2em 0 .4em}
.stat{display:block} .stat:hover{border-color:var(--blue)}
.stat-num{font-size:34px;font-weight:800;color:var(--navy);line-height:1}
.stat-label{color:var(--muted);margin-top:6px;font-weight:600}
.toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.toolbar h2{margin:0}
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th,.table td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
.table th{background:#fafbfc;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.table tr:last-child td{border-bottom:0}
.right{text-align:right}.nowrap{white-space:nowrap}
.form .field{margin-bottom:14px;display:flex;flex-direction:column;gap:6px;max-width:460px}
.form label{font-size:13px;font-weight:600}
.form input,.form select,.form textarea{padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit}
.req{color:var(--red)}

/* ---- buttons ---- */
.btn{display:inline-block;border:1px solid var(--line);background:#fff;color:var(--ink);padding:9px 14px;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer}
.btn:hover{border-color:var(--muted)}
.btn-sm{padding:6px 10px;font-size:13px}
.btn-primary{background:var(--blue);border-color:var(--blue);color:#fff}
.btn-primary:hover{background:#184e8c}
.btn-ghost{background:transparent}
.btn-danger{background:#fff;border-color:#e3b4ad;color:var(--red)}
.btn-danger:hover{background:#fdecea}

/* ---- flash ---- */
.flash{padding:10px 14px;border-radius:9px;margin-bottom:12px;font-size:14px}
.flash.ok{background:#e7f5ec;color:#15692f;border:1px solid #bfe3cc}
.flash.error{background:#fdecea;color:#a5281b;border:1px solid #f0b8b1}

@media(max-width:720px){
  .sidebar{width:62px}
  .sidebar .brand,.nav-group,.nav-item span{display:none}
  .nav-item{justify-content:center;padding:12px 0}
}