:root{
  --navy:#020B18; --navy-2:#0A1A2E; --cyan:#00D4FF; --cyan-d:#0089A8; --gold:#C9A007;
  --ink:#1A2230; --muted:#5B6575; --line:#DCE3EC; --soft:#F3F6FA; --bg:#EEF2F6;
  --ok:#0E8A5F; --ok-bg:#E3F6EE; --warn:#A86A00; --warn-bg:#FFF4DC; --err:#C0392B; --err-bg:#FDECEA; --info-bg:#E6F9FF;
}
*{ box-sizing:border-box; }
html,body{ margin:0; }
body{ font-family:'Montserrat',Arial,sans-serif; color:var(--ink); background:var(--bg); font-size:14px; line-height:1.5; }
a{ color:var(--cyan-d); text-decoration:none; }
a:hover{ text-decoration:underline; }

/* Layout */
.layout{ display:flex; min-height:100vh; }
.side{ width:236px; flex:none; background:var(--navy); color:#fff; padding:22px 14px; position:sticky; top:0; height:100vh; display:flex; flex-direction:column; }
.brand{ display:flex; align-items:center; gap:10px; padding:0 8px 22px; }
.brand img{ width:44px; height:44px; }
.brand b{ font-family:'Cinzel',serif; color:var(--gold); font-size:15px; letter-spacing:1px; line-height:1.15; display:block; }
.brand small{ color:var(--cyan); font-size:10px; letter-spacing:1.5px; text-transform:uppercase; font-weight:600; }
.nav-group{ color:#7F8FA6; font-size:10.5px; font-weight:700; letter-spacing:2px; text-transform:uppercase; margin:18px 10px 6px; }
.nav a{ display:flex; align-items:center; gap:10px; color:#DDE6F0; padding:9px 10px; border-radius:7px; font-weight:500; }
.nav a:hover{ background:var(--navy-2); text-decoration:none; }
.nav a.on{ background:var(--navy-2); color:var(--cyan); font-weight:700; box-shadow:inset 3px 0 0 var(--cyan); }
.nav a .soon{ margin-left:auto; font-size:9px; background:#2A3950; color:#C9D3E0; padding:2px 6px; border-radius:4px; letter-spacing:1px; }
.nav .ico{ width:18px; text-align:center; opacity:.9; }
.side .foot{ margin-top:auto; padding:10px; font-size:12px; }
.side .foot a{ color:#9FB0C6; }
main{ flex:1; min-width:0; padding:28px 34px 60px; }
.top{ display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-bottom:20px; }
h1{ margin:0; font-size:24px; color:var(--navy); }
h1 small{ display:block; font-size:13px; font-weight:500; color:var(--muted); margin-top:2px; }
h2{ font-size:16px; color:var(--navy); margin:0 0 12px; }

/* Components */
.card{ background:#fff; border-radius:10px; padding:20px 22px; box-shadow:0 1px 3px rgba(2,11,24,.06); margin-bottom:18px; }
.grid{ display:grid; gap:16px; }
.g4{ grid-template-columns:repeat(4, 1fr); } .g3{ grid-template-columns:repeat(3, 1fr); } .g2{ grid-template-columns:repeat(2, 1fr); }
.kpi{ background:#fff; border-radius:10px; padding:16px 18px; box-shadow:0 1px 3px rgba(2,11,24,.06); border-top:3px solid var(--navy); }
.kpi .l{ font-size:11px; font-weight:700; letter-spacing:1.3px; text-transform:uppercase; color:var(--muted); }
.kpi .v{ font-size:24px; font-weight:800; color:var(--navy); margin-top:4px; }
.kpi .s{ font-size:12px; color:var(--muted); }
.kpi.cyan{ border-top-color:var(--cyan); } .kpi.gold{ border-top-color:var(--gold); } .kpi.red{ border-top-color:var(--err); }

.btn{ display:inline-flex; align-items:center; gap:6px; border:1px solid transparent; border-radius:7px; padding:9px 15px; font:600 13px 'Montserrat',sans-serif;
  cursor:pointer; background:var(--navy); color:#fff; text-decoration:none; white-space:nowrap; }
.btn:hover{ text-decoration:none; filter:brightness(1.15); }
.btn.cyan{ background:var(--cyan); color:var(--navy); }
.btn.ghost{ background:#fff; color:var(--navy); border-color:var(--line); }
.btn.ghost:hover{ border-color:var(--navy); filter:none; }
.btn.danger{ background:#fff; color:var(--err); border-color:#F2C7C2; }
.btn.ok{ background:var(--ok); }
.btn.sm{ padding:6px 10px; font-size:12px; }
.btn:disabled{ opacity:.5; cursor:not-allowed; }
.actions{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
form.inline{ display:inline; margin:0; }

table.t{ width:100%; border-collapse:collapse; }
table.t th{ text-align:left; font-size:11px; letter-spacing:1.2px; text-transform:uppercase; color:var(--muted); padding:9px 10px; border-bottom:2px solid var(--line); font-weight:700; }
table.t td{ padding:11px 10px; border-bottom:1px solid var(--line); vertical-align:middle; }
table.t tr.link{ cursor:pointer; } table.t tr.link:hover td{ background:var(--soft); }
table.t .num{ text-align:right; white-space:nowrap; }
table.t tfoot td{ font-weight:800; color:var(--navy); border-bottom:0; }
.empty{ text-align:center; color:var(--muted); padding:30px 10px; }

.badge{ display:inline-block; padding:3px 9px; border-radius:20px; font-size:11.5px; font-weight:700; white-space:nowrap; background:var(--soft); color:var(--muted); }
.b-borrador{ background:#EEF0F3; color:#5B6575; }
.b-enviado, .b-en_curso, .b-emitida{ background:var(--info-bg); color:var(--cyan-d); }
.b-aceptado, .b-cobrada, .b-facturado{ background:var(--ok-bg); color:var(--ok); }
.b-rechazado, .b-vencida{ background:var(--err-bg); color:var(--err); }
.b-anticipo_pendiente{ background:var(--warn-bg); color:var(--warn); }

.flash{ padding:12px 16px; border-radius:8px; margin-bottom:14px; font-weight:500; background:var(--ok-bg); color:var(--ok); border-left:4px solid var(--ok); }
.flash.error{ background:var(--err-bg); color:var(--err); border-left-color:var(--err); }
.note{ background:var(--info-bg); border-left:4px solid var(--cyan); padding:12px 16px; border-radius:8px; margin-bottom:14px; }
.note.warn{ background:var(--warn-bg); border-left-color:var(--gold); }

/* Forms */
label{ display:block; font-size:12px; font-weight:700; color:var(--navy); margin-bottom:5px; letter-spacing:.3px; }
input[type=text], input[type=email], input[type=date], input[type=number], input[type=password], input[type=search], select, textarea{
  width:100%; padding:9px 11px; border:1px solid var(--line); border-radius:7px; font:500 14px 'Montserrat',sans-serif; color:var(--ink); background:#fff; }
input:focus, select:focus, textarea:focus{ outline:none; border-color:var(--cyan); box-shadow:0 0 0 3px rgba(0,212,255,.15); }
textarea{ min-height:80px; resize:vertical; }
.field{ margin-bottom:14px; }
.help{ font-size:12px; color:var(--muted); margin-top:4px; }
.row2{ display:grid; grid-template-columns:1fr 1fr; gap:14px; } .row3{ display:grid; grid-template-columns:1fr 1fr 1fr; gap:14px; } .row4{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.lines td{ padding:6px 5px; } .lines input{ padding:8px 9px; }
.lines .c-desc{ width:55%; } .lines .c-num{ width:13%; }
.lines textarea{ min-height:40px; height:40px; }
.x{ background:none; border:0; color:var(--err); font-size:20px; cursor:pointer; line-height:1; padding:4px 8px; }
.sumline{ text-align:right; font-size:16px; font-weight:800; color:var(--navy); margin-top:10px; }

.tabs{ display:flex; gap:4px; border-bottom:2px solid var(--line); margin-bottom:18px; flex-wrap:wrap; }
.tabs a{ padding:10px 16px; color:var(--muted); font-weight:600; border-bottom:3px solid transparent; margin-bottom:-2px; }
.tabs a.on{ color:var(--navy); border-bottom-color:var(--cyan); }
.tabs a:hover{ text-decoration:none; color:var(--navy); }

.dl{ display:grid; grid-template-columns:140px 1fr; gap:6px 14px; font-size:13.5px; }
.dl dt{ color:var(--muted); font-weight:600; } .dl dd{ margin:0; }
.preview{ width:100%; height:1150px; border:1px solid var(--line); border-radius:8px; background:#E6EAF0; }
.two{ display:grid; grid-template-columns:minmax(0, 1fr) 330px; gap:18px; align-items:start; }
.flowline{ display:flex; gap:6px; align-items:center; flex-wrap:wrap; font-size:12.5px; }
.flowline .st{ padding:4px 10px; border-radius:6px; background:var(--soft); color:var(--muted); font-weight:600; }
.flowline .st.on{ background:var(--navy); color:#fff; }
.muted{ color:var(--muted); }
details.send summary{ cursor:pointer; list-style:none; }
details.send summary::-webkit-details-marker{ display:none; }

/* Login */
.auth{ min-height:100vh; display:flex; align-items:center; justify-content:center; background:var(--navy); position:relative; overflow:hidden; padding:16px; }
.auth::before{ content:""; position:absolute; inset:0; background:url('/static/fondo.jpg') center/cover no-repeat; opacity:.35; }
.auth .box{ position:relative; background:#fff; border-radius:12px; padding:34px 32px; width:100%; max-width:390px; box-shadow:0 20px 60px rgba(0,0,0,.35); }
.auth .logo{ display:block; width:84px; margin:0 auto 10px; }
.auth h1{ text-align:center; font-family:'Cinzel',serif; color:var(--gold); font-size:22px; }
.auth p{ text-align:center; color:var(--muted); margin:6px 0 22px; }
.auth .btn{ width:100%; justify-content:center; padding:12px; }

@media (max-width: 1100px){ .g4{ grid-template-columns:repeat(2,1fr); } .two{ grid-template-columns:1fr; } }
@media (max-width: 860px){
  .layout{ flex-direction:column; }
  .side{ width:100%; height:auto; position:static; padding:12px 16px; }
  .brand{ padding-bottom:8px; }
  .nav{ display:flex; gap:4px; overflow-x:auto; }
  .nav-group, .side .foot{ display:none; }
  .nav a{ white-space:nowrap; }
  main{ padding:18px 16px 50px; }
  .g3, .g2, .row2, .row3, .row4{ grid-template-columns:1fr; }
  .dl{ grid-template-columns:1fr; }
  table.t .hide-m{ display:none; }
  .preview{ height:700px; }
  .kpi .v{ font-size:18px; }
  .kpi{ padding:13px 14px; }
}

/* Filtros de listados */
.filters{ display:flex; gap:12px; flex-wrap:wrap; align-items:flex-end; padding:16px 18px; }
.filters .field{ margin:0; min-width:150px; }
.filters .grow{ flex:1; min-width:180px; }
@media (max-width: 860px){ .filters .field{ min-width:calc(50% - 6px); } }

/* Vista previa de la firma de email */
.firma-preview{ border:1px solid var(--line); border-radius:8px; padding:16px 18px; background:#fff; font-family:Arial,Helvetica,sans-serif; font-size:14px; line-height:1.55; }
.firma-preview img{ display:block; width:120px; height:120px; margin:0 0 12px; }
.firma-preview a{ color:#1155CC; text-decoration:underline; }