:root{
  --bg:#f5f6f8; --surface:#ffffff; --surface-2:#f0f1f4; --border:#e3e5ea;
  --text:#1a1d24; --text-muted:#666e7d; --primary:#2f5eff; --primary-dark:#1f45d1;
  --success:#1a9e6a; --success-bg:#e6f7f0; --warning:#c17a00; --warning-bg:#fff4e0;
  --danger:#d1372f; --danger-bg:#fdecea; --info:#0b7ec2;
  --radius:10px; --shadow:0 1px 2px rgba(20,20,30,.05), 0 1px 8px rgba(20,20,30,.04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1115; --surface:#171a21; --surface-2:#1f232c; --border:#2a2f3a;
    --text:#e8eaee; --text-muted:#9aa2b1; --primary:#5b7fff; --primary-dark:#7d99ff;
    --success:#31c48d; --success-bg:#0f2a20; --warning:#f0a52a; --warning-bg:#2c2107;
    --danger:#f2564a; --danger-bg:#2c1210; --info:#38b6ff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1115; --surface:#171a21; --surface-2:#1f232c; --border:#2a2f3a;
  --text:#e8eaee; --text-muted:#9aa2b1; --primary:#5b7fff; --primary-dark:#7d99ff;
  --success:#31c48d; --success-bg:#0f2a20; --warning:#f0a52a; --warning-bg:#2c2107;
  --danger:#f2564a; --danger-bg:#2c1210; --info:#38b6ff;
  color-scheme: dark;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5}
a{color:var(--primary);text-decoration:none}
.layout{display:flex;min-height:100vh}
.sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);padding:16px 12px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;padding:8px 8px 20px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--primary)}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;color:var(--text-muted);font-weight:500;margin-bottom:2px}
.nav-item:hover{background:var(--surface-2);color:var(--text)}
.nav-item.active{background:var(--primary);color:#fff}
.nav-section{font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);padding:16px 10px 6px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--surface);position:sticky;top:0;z-index:5}
.topbar-search{flex:1;max-width:420px}
.topbar-search input{width:100%}
.content{padding:24px;max-width:1400px;width:100%;margin:0 auto}
.user-chip{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}
.avatar{width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px}

h1,h2,h3{margin:0 0 4px;font-weight:700}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:12px}
.page-header p{margin:0;color:var(--text-muted)}

.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.grid{display:grid;gap:16px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:1000px){.grid.cols-4{grid-template-columns:repeat(2,1fr)}.grid.cols-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.sidebar{display:none}.grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}}

.stat{display:flex;flex-direction:column;gap:6px}
.stat .label{color:var(--text-muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.stat .value{font-size:28px;font-weight:700}
.stat .sub{font-size:12px;color:var(--text-muted)}

table{width:100%;border-collapse:collapse;font-size:13px}
thead th{text-align:left;color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em;padding:10px 12px;border-bottom:1px solid var(--border);white-space:nowrap}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}
tbody tr:hover{background:var(--surface-2)}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}

input,select,textarea,button{font:inherit;color:inherit}
input[type=text],input[type=email],input[type=password],input[type=date],input[type=search],input[type=number],select,textarea{
  width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);
}
input:focus,select:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:0;border-color:var(--primary)}
label{display:block;font-size:12px;font-weight:600;color:var(--text-muted);margin-bottom:6px}
.field{margin-bottom:14px}
.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media(max-width:700px){.form-row{grid-template-columns:1fr}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border-radius:8px;border:1px solid transparent;font-weight:600;cursor:pointer;background:var(--surface-2);color:var(--text)}
.btn:hover{filter:brightness(0.97)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{background:transparent;border-color:var(--border)}
.btn-danger{background:var(--danger);color:#fff}
.btn-sm{padding:6px 10px;font-size:12px}
.btn-lg{padding:14px 20px;font-size:15px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

.badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:20px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.02em}
.badge-success{background:var(--success-bg);color:var(--success)}
.badge-warning{background:var(--warning-bg);color:var(--warning)}
.badge-danger{background:var(--danger-bg);color:var(--danger)}
.badge-muted{background:var(--surface-2);color:var(--text-muted)}

.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:13px}
.alert-danger{background:var(--danger-bg);color:var(--danger)}
.alert-success{background:var(--success-bg);color:var(--success)}
.alert-info{background:var(--surface-2);color:var(--text)}
.alert-warning{background:var(--warning-bg);color:var(--warning)}

.serial-hero{max-width:680px;margin:40px auto;text-align:center}
.serial-hero input{font-size:22px;padding:20px;text-align:center;letter-spacing:.03em;font-weight:600}
.serial-hero .actions{display:flex;gap:12px;margin-top:16px;justify-content:center;flex-wrap:wrap}
.result-card{max-width:680px;margin:24px auto 0}
.kv{display:grid;grid-template-columns:160px 1fr;gap:8px 16px;font-size:13px;margin:14px 0}
.kv dt{color:var(--text-muted)}
.kv dd{margin:0;font-weight:600}
.kv dd.muted{color:var(--text-muted);font-weight:400}

.pagination{display:flex;gap:6px;align-items:center;justify-content:flex-end;margin-top:14px}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.toolbar > *{flex-shrink:0}
.toolbar .grow{flex:1;min-width:180px}
.muted{color:var(--text-muted)}
.hidden{display:none!important}
.spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.checkbox-list{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.checkbox-list label{display:flex;align-items:center;gap:8px;font-weight:400;color:var(--text)}
.checkbox-list input{width:auto}
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal{background:var(--surface);border-radius:var(--radius);max-width:520px;width:100%;max-height:90vh;overflow-y:auto;padding:20px;box-shadow:0 10px 40px rgba(0,0,0,.2)}