:root{
  --blue:#0061FE;
  --blue-bg:#e8f0ff;
  --slate:#030303;
  --stone:#475268;
  --linen:#E0E5EC;
  --white:#fff;
  --green:#166a3f;
  --green-bg:#e5f5ec;
  --red:#b3261e;
  --red-bg:#fdecec;
  --border:#c7cedb;
  --radius:10px;
  --radius-sm:8px;
  --shadow-sm:0 1px 2px rgba(3,3,3,.06);
  --control-height:44px;
}
*{box-sizing:border-box}
html{font-size:16px}
html,body{margin:0;padding:0}
body{
  font-family:"Saans","Neue Montreal",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  color:var(--slate);
  background:var(--linen);
  font-size:1rem; /* 16px: piso de legibilidad para todo el texto que no defina rem propio */
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0 0 .4rem;font-weight:600;letter-spacing:-.01em}
h2{font-size:1.15rem;color:var(--blue)}
.muted{color:var(--stone)}
.hidden{display:none !important}
.num{text-align:right}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

/* topbar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:2rem;
  padding:1rem 1.5rem;background:var(--white);border-bottom:1px solid var(--linen);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:.7rem}
.brand strong{display:block;font-size:1.05rem;letter-spacing:-.02em}
.brand small{display:block;color:var(--stone);font-size:.8125rem}
.dot{width:12px;height:12px;border-radius:50%;background:var(--blue);display:inline-block}
.tabs{display:flex;gap:.25rem;flex-wrap:wrap}
.tab{
  border:0;background:transparent;color:var(--stone);cursor:pointer;
  padding:.6rem 1rem;border-radius:var(--radius);font:inherit;font-weight:600;
  min-height:44px;
}
.tab:hover{background:var(--linen)}
.tab.active{background:var(--slate);color:var(--white)}

main{padding:1.5rem 1.5rem 4rem;max-width:1400px;margin:0 auto}

/* cards & layout */
.card{background:var(--white);border-radius:var(--radius);padding:1.5rem;margin-bottom:1rem;box-shadow:var(--shadow-sm);min-width:0}
.split{display:grid;grid-template-columns:360px 1fr;gap:1rem;align-items:start}
.split > *{min-width:0}
.row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
.row.between{justify-content:space-between;margin-bottom:.9rem}

/* KPIs */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}
.kpi{background:var(--white);border-radius:var(--radius);padding:1.2rem 1.3rem;box-shadow:var(--shadow-sm)}
.kpi .v{font-size:1.8rem;font-weight:600;letter-spacing:-.02em;line-height:1.15}
.kpi .l{color:var(--stone);font-size:.85rem;letter-spacing:.02em;margin-top:.3rem}
.kpi.accent .v{color:var(--blue)}

/* controles de formulario */
input,select,textarea,button{font:inherit;color:var(--slate)}
input:not([type=hidden]):not([type=checkbox]):not([type=radio]),select,textarea{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.65rem .8rem;
  outline:0;width:100%;min-height:44px;
}
textarea{min-height:auto}
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-bg)}
input.invalid,select.invalid{border-color:var(--red);box-shadow:0 0 0 3px var(--red-bg)}
.toolbar{display:flex;gap:.7rem;align-items:center;margin-bottom:1.1rem;flex-wrap:wrap}
.toolbar input[type=search]{flex:1;min-width:240px}
.toolbar select{width:auto;min-width:170px}
label.inline{display:flex;align-items:center;gap:.5rem;color:var(--stone);white-space:nowrap;font-weight:500}
label.inline input{width:80px}
.form label{display:block;margin-bottom:.9rem;color:var(--stone);font-size:.9375rem;font-weight:500}
.form label input,.form label textarea{margin-top:.35rem;color:var(--slate);font-weight:400}
.help{display:block;margin-top:.35rem;color:var(--stone);font-size:.8125rem;font-weight:400;line-height:1.4}
.notas{display:block;margin-top:1rem;color:var(--stone);font-size:.9375rem;font-weight:500}
.notas textarea{margin-top:.35rem}

/* ícono "?" con explicación al pasar el mouse / foco */
.qmark{
  display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;flex:none;
  border-radius:50%;background:var(--linen);color:var(--stone);font-size:.75rem;font-weight:700;
  cursor:help;
}
.qmark:hover,.qmark:focus-visible{background:var(--blue-bg);color:var(--blue)}

.btn{
  background:var(--blue);color:#fff;border:0;border-radius:var(--radius-sm);padding:.6rem 1.2rem;
  cursor:pointer;font-weight:600;white-space:nowrap;min-height:var(--control-height);font-size:1rem;
  display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  transition:filter .12s,opacity .12s;
}
.btn:hover{filter:brightness(.92)}
.btn:disabled{opacity:.6;cursor:default;filter:none}
.btn.ghost{background:transparent;color:var(--stone);border:1px solid var(--border)}
.btn.ghost:hover{background:var(--linen);filter:none}
.btn.mini{padding:.4rem .8rem;font-size:.875rem;font-weight:600;min-height:36px}
.linkbtn{
  background:var(--white);color:var(--blue);cursor:pointer;padding:.4rem .8rem;font-weight:600;
  border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.875rem;min-height:38px;
  display:inline-flex;align-items:center;
}
.linkbtn:hover{background:var(--blue-bg);border-color:var(--blue)}
.linkbtn.danger{color:var(--red);border-color:#f0c9c6}
.linkbtn.danger:hover{background:var(--red-bg);border-color:var(--red)}

/* tables */
.tablewrap{background:var(--white);border-radius:var(--radius);overflow:auto;box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse}
th,td{padding:.75rem .9rem;text-align:left;border-bottom:1px solid var(--linen);vertical-align:middle;font-size:.9375rem}
th{
  color:var(--stone);font-size:.8125rem;text-transform:uppercase;letter-spacing:.04em;font-weight:700;
  position:sticky;top:0;background:var(--white);z-index:1;
}
tbody tr:hover{background:#f6f8fb}
.code{font-weight:600;font-variant-numeric:tabular-nums}
.price{font-variant-numeric:tabular-nums}
.price.final{font-weight:700;color:var(--blue)}
td input[type=number]{width:100%;padding:.4rem .5rem;text-align:right;min-height:38px}
.pager{display:flex;gap:1rem;align-items:center;padding:1rem 0;flex-wrap:wrap}
.tag{background:var(--linen);color:var(--stone);border-radius:999px;padding:.3rem .7rem;font-size:.8125rem;font-weight:600;white-space:nowrap}
.tag.b{background:var(--blue-bg);color:var(--blue)}

/* estados vacíos */
.empty-state{padding:3rem 1.5rem !important;text-align:center;color:var(--stone);font-size:.9375rem}
.empty-state .icon{font-size:1.8rem;display:block;margin-bottom:.5rem}
.empty-state .cta{color:var(--blue);font-weight:600}

/* autocomplete de productos */
.results{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);max-height:300px;overflow:auto;margin:-.5rem 0 1rem;box-shadow:var(--shadow-sm)}
.results div{padding:.7rem .9rem;cursor:pointer;display:flex;gap:.75rem;align-items:baseline;border-bottom:1px solid var(--linen);font-size:.9375rem}
.results div:hover{background:#f6f8fb}
.results .desc{flex:1}

/* totales */
.totals{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-top:1.5rem;padding-top:1.2rem;border-top:2px solid var(--slate)}
.totals .t{text-align:right}
.totals .t .l{color:var(--stone);font-size:.8125rem;text-transform:uppercase;letter-spacing:.04em;font-weight:600}
.totals .t .v{font-size:1.4rem;font-weight:700;letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.totals .t.main .v{color:var(--blue);font-size:1.9rem}

.doc .dochead{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}
.dochead-right{display:flex;gap:.9rem;align-items:center;flex-wrap:wrap}
.printonly{display:none}
.leyenda{margin:1.5rem 0 0;padding:1rem 1.1rem;background:var(--linen);border-radius:var(--radius);line-height:1.6}
.firmas{display:grid;grid-template-columns:1fr 1fr;gap:3rem;margin-top:3.5rem;color:var(--stone);font-size:.9rem;text-align:center}
.firmas .line{display:block;border-top:1px solid var(--slate);margin-bottom:.4rem}

/* mensajes de error y confirmación en el propio formulario */
.field-error{
  display:none;color:var(--red);background:var(--red-bg);border:1px solid #f0c9c6;
  border-radius:var(--radius-sm);padding:.7rem .9rem;font-size:.9rem;margin:.5rem 0 .9rem;
}
.field-error.show{display:block}
.banner-ok{
  display:none;color:var(--green);background:var(--green-bg);border:1px solid #bfe3cd;
  border-radius:var(--radius-sm);padding:.7rem .9rem;font-size:.9rem;margin:.5rem 0 .9rem;
}
.banner-ok.show{display:block}

/* confirmación flotante (toast) */
.toast{
  position:fixed;left:50%;bottom:1.5rem;transform:translateX(-50%);
  background:var(--slate);color:var(--white);padding:.85rem 1.3rem;border-radius:var(--radius-sm);
  font-size:.9375rem;font-weight:500;box-shadow:0 6px 18px rgba(3,3,3,.25);z-index:100;
  max-width:90vw;text-align:center;
}
.toast.error{background:var(--red)}
.toast.ok{background:var(--green)}

/* login */
.login-screen{display:grid;grid-template-columns:1fr 1fr;min-height:100vh}
.login-brand{
  background:var(--slate);color:var(--white);display:flex;flex-direction:column;
  justify-content:center;gap:1rem;padding:4rem;
}
.login-brand .dot{width:18px;height:18px}
.login-brand h1{color:var(--white);font-size:2.5rem;margin:0}
.login-brand p{color:var(--linen);max-width:380px;font-size:1.05rem;line-height:1.6;margin:0}
.login-panel{background:var(--white);display:flex;align-items:center;justify-content:center;padding:2rem}
.login-wrap{max-width:360px;width:100%}

@media print{
  .noprint,.topbar,.toast{display:none !important}
  body{background:#fff}
  main{padding:0}
  .printonly{display:block}
  .firmas.printonly{display:grid}
  .card{padding:0;box-shadow:none}
}
@media (max-width:900px){
  .split{grid-template-columns:1fr}
  .topbar{flex-direction:column;align-items:flex-start;gap:.75rem}
  main{padding:1rem}
  .login-screen{grid-template-columns:1fr;min-height:auto}
  .login-brand{padding:2.5rem 1.5rem;gap:.5rem}
  .login-brand h1{font-size:1.8rem}
  .login-brand p{font-size:.9375rem}
  .login-panel{padding:2rem 1.5rem}
}
.google-btn{min-height:44px;margin:1rem 0 .5rem}