:root{
  --navy:#0f2b5b;--navy-2:#163a75;--accent:#2563eb;--accent-2:#1d4ed8;
  --bg:#f3f5f9;--card:#fff;--line:#e3e7ef;--text:#1f2937;--muted:#6b7280;
  --ok:#059669;--ok-bg:#ecfdf5;--warn:#b45309;--warn-bg:#fffbeb;--bad:#dc2626;--bad-bg:#fef2f2;
  --radius:10px;--shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;line-height:1.25}
h2{font-size:16px;margin-bottom:12px}
h3{font-size:14px;margin-bottom:8px}

/* Layout */
.sidebar{position:fixed;inset:0 auto 0 0;width:232px;background:var(--navy);color:#cbd5e1;display:flex;flex-direction:column;z-index:30;transition:transform .2s}
.brand{padding:20px 20px 16px;color:#fff;font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px}
.brand-dot{width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,#60a5fa,#22d3ee)}
.sidebar nav{flex:1;overflow:auto;padding:4px 10px}
.sidebar nav a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:#cbd5e1;margin-bottom:2px}
.sidebar nav a svg{width:18px;height:18px;flex:none}
.sidebar nav a:hover{background:rgba(255,255,255,.07);color:#fff;text-decoration:none}
.sidebar nav a.active{background:var(--navy-2);color:#fff}
.sidebar-foot{padding:14px 20px;border-top:1px solid rgba(255,255,255,.08);font-size:13px}
.sidebar-foot a{color:#cbd5e1}
.main{margin-left:232px;min-height:100vh}
.topbar{display:flex;align-items:center;gap:16px;padding:14px 28px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.topbar h1{font-size:19px;flex:1}
.search input{width:280px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
.burger{display:none;font-size:22px;cursor:pointer}
.nav-backdrop{display:none}
.content{padding:24px 28px;max-width:1280px}

/* Cards / grids */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px;margin-bottom:18px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.card-head h2{margin:0}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.stat .lbl{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.stat .val{font-size:22px;font-weight:700;margin-top:4px}
.stat .sub{color:var(--muted);font-size:12px}
.stat.bad .val{color:var(--bad)} .stat.ok .val{color:var(--ok)}

/* Tablas */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.03em;background:#fafbfd}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;white-space:nowrap}
tr.anulado td{color:var(--muted);text-decoration:line-through}
tr.reversion td{color:var(--muted);font-style:italic}
tfoot td{font-weight:700;background:#fafbfd}
.empty{padding:22px;text-align:center;color:var(--muted)}

/* Badges / alerts */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.badge-ok{background:var(--ok-bg);color:var(--ok)}
.badge-warn{background:var(--warn-bg);color:var(--warn)}
.badge-bad{background:var(--bad-bg);color:var(--bad)}
.badge-muted{background:#f1f3f7;color:var(--muted)}
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;border:1px solid}
.alert-ok{background:var(--ok-bg);border-color:#a7f3d0;color:#065f46}
.alert-error{background:var(--bad-bg);border-color:#fecaca;color:#991b1b}
.alert-info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}
.alert-warn{background:var(--warn-bg);border-color:#fde68a;color:#92400e}
.muted{color:var(--muted)}
.small{font-size:12px}
.pos{color:var(--bad);font-weight:700} .neg{color:var(--ok);font-weight:700}

/* Formularios */
label{display:block;font-weight:600;font-size:13px;margin-bottom:4px}
.field{margin-bottom:14px}
.field .hint{font-weight:400;color:var(--muted);font-size:12px;margin-top:3px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],input[type=search],input[type=url],select,textarea{
  width:100%;padding:8px 11px;border:1px solid #cfd6e3;border-radius:8px;font:inherit;background:#fff;color:var(--text)}
input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:var(--accent)}
textarea{min-height:90px;resize:vertical}
.check{display:flex;align-items:flex-start;gap:8px;font-weight:400;margin-bottom:10px}
.check input{margin-top:3px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>.field{flex:1;min-width:160px}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.inline{display:inline}

.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--text);font:inherit;font-weight:600;cursor:pointer;white-space:nowrap}
.btn:hover{background:#f6f8fb;text-decoration:none}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-2)}
.btn-ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn-ok:hover{background:#047857}
.btn-danger{color:var(--bad);border-color:#fecaca}
.btn-danger:hover{background:var(--bad-bg)}
.btn-sm{padding:5px 10px;font-size:12px}
.btn:disabled{opacity:.6;cursor:wait}

.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:18px;flex-wrap:wrap}
.tabs a{padding:9px 14px;border-bottom:2px solid transparent;color:var(--muted);font-weight:600}
.tabs a.active{color:var(--accent);border-color:var(--accent)}
.tabs a:hover{text-decoration:none;color:var(--text)}

.panel{background:#fafbfd;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}
dl.kv{display:grid;grid-template-columns:150px 1fr;gap:6px 12px;margin:0}
dl.kv dt{color:var(--muted)} dl.kv dd{margin:0;word-break:break-word}
.pager{display:flex;gap:4px;margin-top:14px}
.pager a,.pager span{padding:4px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
.pager span{background:var(--accent);color:#fff;border-color:var(--accent)}
.filters{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;margin-bottom:14px}
.filters .field{margin:0;min-width:140px}
pre.log{background:#0b1220;color:#d1e2ff;padding:12px;border-radius:8px;white-space:pre-wrap;font-size:12px}
.items-table input{padding:6px 8px}
.saldo-box{font-size:24px;font-weight:700}

/* Login / instalador */
.auth-wrap{min-height:100vh;display:grid;place-items:center;background:linear-gradient(160deg,#0f2b5b,#1e4fa3);padding:20px}
.auth{background:#fff;border-radius:14px;padding:30px;width:100%;max-width:420px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.auth.wide{max-width:640px}
.auth h1{font-size:20px;margin-bottom:6px}
.auth p.muted{margin-top:0}

@media (max-width: 980px){
  .g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width: 820px){
  .sidebar{transform:translateX(-100%)}
  #nav-toggle:checked ~ .sidebar{transform:none}
  #nav-toggle:checked ~ .nav-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:20}
  .main{margin-left:0}
  .burger{display:block}
  .topbar{padding:12px 16px;flex-wrap:wrap}
  .search{width:100%;order:3} .search input{width:100%}
  .content{padding:16px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  dl.kv{grid-template-columns:1fr} dl.kv dt{margin-top:6px}
}
@media print{
  .sidebar,.topbar,.no-print{display:none!important}
  .main{margin:0} .card{box-shadow:none;border:0}
}