:root {
  --bg: #f4f2ef;
  --panel: #ffffff;
  --text: #1e1b18;
  --muted: #6b645d;
  --line: #e2ddd6;
  --accent: #7a1f2b;
  --accent-soft: #f6e8ea;
  --on-accent: #ffffff;
  --ok: #1f7a4d;
  --ok-soft: #e4f3ea;
  --warn: #a3520b;
  --warn-soft: #fdf0e1;
  --danger: #b3261e;
  --danger-soft: #fbe7e5;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(30, 27, 24, .06), 0 4px 16px rgba(30, 27, 24, .05);
  --tap: 48px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171513;
    --panel: #221f1c;
    --text: #f1ede8;
    --muted: #a9a198;
    --line: #37322d;
    --accent: #d9677a;
    --accent-soft: #3a2126;
    --on-accent: #1a0d10;
    --ok: #5fc792;
    --ok-soft: #1d3328;
    --warn: #f0a457;
    --warn-soft: #3a2b1b;
    --danger: #f08279;
    --danger-soft: #3d2120;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 var(--font);
  padding-bottom: calc(76px + env(safe-area-inset-bottom));
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 .75rem; }
a { color: var(--accent); }
.mono { font-family: var(--mono); letter-spacing: .02em; }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ── Cabecera y navegación ── */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .6rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.marca { display: flex; align-items: center; gap: .6rem; }
.marca small { display: block; color: var(--muted); font-size: .78rem; }
.marca-logo {
  width: 36px; height: 36px; border-radius: 9px;
  display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 700;
}
.tabs { display: flex; gap: .25rem; }
.tabs a {
  display: flex; align-items: center; gap: .4rem;
  min-height: 42px; padding: 0 .9rem; border-radius: 10px;
  color: var(--muted); text-decoration: none; font-weight: 600;
}
.tabs a:hover { background: var(--bg); color: var(--text); }
.tabs a.activa { background: var(--accent-soft); color: var(--accent); }
.tabs .ico { font-size: 1.1rem; }

@media (max-width: 820px) {
  .tabs {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    justify-content: space-around;
    padding: .35rem .25rem calc(.35rem + env(safe-area-inset-bottom));
    background: var(--panel); border-top: 1px solid var(--line);
  }
  .tabs a { flex-direction: column; gap: 0; min-height: 54px; padding: .2rem .4rem; font-size: .72rem; justify-content: center; flex: 1; }
  .tabs .ico { font-size: 1.3rem; }
}
@media (min-width: 821px) { body { padding-bottom: 2rem; } }

/* ── Layout ── */
main { max-width: 1100px; margin: 0 auto; padding: 1rem; outline: none; }
.cabecera-vista { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin: .5rem 0 1rem; }
.cabecera-vista p { margin: 0; color: var(--muted); }
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1rem; margin-bottom: 1rem;
}
.rejilla { display: grid; gap: 1rem; }
@media (min-width: 900px) { .rejilla-2 { grid-template-columns: 1fr 1fr; } .rejilla-3-1 { grid-template-columns: 3fr 2fr; } }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .75rem; margin-bottom: 1rem; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; }
.stat b { display: block; font-size: 1.8rem; line-height: 1.1; }
.stat span { color: var(--muted); font-size: .85rem; }
.stat.alerta b { color: var(--warn); }

/* ── Formularios ── */
.campos { display: grid; gap: .85rem; }
@media (min-width: 640px) { .campos-3 { grid-template-columns: 2fr 1.5fr 1fr; } .campos-2 { grid-template-columns: 1fr 1fr; } .campos-4 { grid-template-columns: 1.2fr 1.4fr 1fr; } }
label { display: grid; gap: .3rem; font-weight: 600; font-size: .9rem; }
label .ayuda { font-weight: 400; color: var(--muted); font-size: .8rem; }
input, select, textarea {
  width: 100%; min-height: var(--tap);
  padding: .6rem .75rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  font: inherit; font-size: 1rem;
}
textarea { min-height: 70px; resize: vertical; }
input:focus, select:focus, textarea:focus, button:focus-visible, a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 1px; border-color: var(--accent);
}
.acciones { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-top: 1rem; }
.acciones.fin { justify-content: flex-end; }

button, .boton {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: var(--tap); padding: 0 1.1rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  touch-action: manipulation;
}
button:hover { border-color: var(--muted); }
button:disabled { opacity: .55; cursor: not-allowed; }
.primario { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.primario:hover { filter: brightness(1.08); border-color: var(--accent); }
.aviso-btn { background: var(--warn-soft); border-color: var(--warn); color: var(--warn); }
.peligro { color: var(--danger); }
.pequeño { min-height: 38px; padding: 0 .75rem; font-size: .88rem; }
.icono { min-width: var(--tap); padding: 0; }
.grande { min-height: 56px; font-size: 1.05rem; padding: 0 1.5rem; }

.buscador { display: flex; gap: .5rem; }
.buscador input { flex: 1; }
.cabecera-vista .buscador { min-width: 240px; }

/* ── Lotes de materia prima ── */
.lista-lotes { display: grid; gap: .6rem; }
.lote {
  display: grid; grid-template-columns: 1fr auto; gap: .5rem 1rem; align-items: center;
  padding: .85rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
}
.lote.bajo { border-color: var(--warn); background: linear-gradient(90deg, var(--warn-soft), var(--panel) 60%); }
.lote.inactivo { opacity: .7; }
.lote-titulo { display: flex; flex-wrap: wrap; gap: .4rem .6rem; align-items: center; }
.lote-titulo strong { font-size: 1.02rem; }
.lote-meta { color: var(--muted); font-size: .85rem; display: flex; flex-wrap: wrap; gap: .25rem .9rem; }
.lote-acciones { display: flex; gap: .4rem; flex-wrap: wrap; justify-content: flex-end; }
@media (max-width: 640px) { .lote { grid-template-columns: 1fr; } .lote-acciones { justify-content: flex-start; } }

.barra { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; margin-top: .45rem; position: relative; }
.barra > i { display: block; height: 100%; background: var(--ok); border-radius: 99px; }
.barra.bajo > i { background: var(--warn); }
.barra::after { content: ""; position: absolute; left: 10%; top: 0; bottom: 0; width: 2px; background: var(--muted); opacity: .5; }

.chip {
  display: inline-flex; align-items: center; gap: .25rem;
  padding: .1rem .55rem; border-radius: 99px; font-size: .75rem; font-weight: 700;
  background: var(--bg); color: var(--muted); border: 1px solid var(--line); white-space: nowrap;
}
.chip.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.chip.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.chip.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.chip.acc { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

.alerta-caja {
  border-radius: var(--radius); padding: .85rem 1rem; margin-bottom: 1rem;
  background: var(--warn-soft); border: 1px solid var(--warn); color: var(--text);
}
.alerta-caja strong { color: var(--warn); }
.alerta-caja.error { background: var(--danger-soft); border-color: var(--danger); }
.alerta-caja.error strong { color: var(--danger); }
.alerta-caja ul { margin: .4rem 0 0; padding-left: 1.2rem; }

/* ── Líneas de ingredientes ── */
.linea {
  display: grid; grid-template-columns: 1fr 150px auto; gap: .6rem; align-items: start;
  padding: .75rem; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: .6rem; background: var(--bg);
}
.linea.bajo { border-color: var(--warn); }
.linea.error { border-color: var(--danger); }
.linea-info { grid-column: 1 / -1; font-size: .85rem; display: flex; flex-wrap: wrap; gap: .4rem .8rem; align-items: center; }
.linea-info:empty { display: none; }
@media (max-width: 640px) { .linea { grid-template-columns: 1fr 1fr auto; } .linea .sel-lote { grid-column: 1 / -1; } }

.vista-codigo {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: .9rem 1rem; border-radius: var(--radius); background: var(--accent-soft); margin-bottom: 1rem;
}
.vista-codigo .codigo { font-family: var(--mono); font-size: 1.6rem; font-weight: 700; color: var(--accent); letter-spacing: .06em; }
.vista-codigo .codigo small { font-size: .85rem; color: var(--muted); font-weight: 400; letter-spacing: 0; }

/* ── Tablas ── */
.tabla-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .93rem; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 700; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tfoot td { font-weight: 700; border-bottom: 0; }
.enlace { background: none; border: 0; padding: 0; min-height: 0; color: var(--accent); font-weight: 700; text-decoration: underline; cursor: pointer; font-family: var(--mono); }

.ficha { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .75rem; margin: .75rem 0 1rem; }
.ficha div { background: var(--bg); border-radius: 10px; padding: .6rem .75rem; }
.ficha dt { font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; font-weight: 700; }
.ficha dd { margin: .15rem 0 0; font-weight: 600; }

.segmentos { display: inline-flex; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 4px; gap: 4px; margin-bottom: 1rem; }
.segmentos button { border: 0; min-height: 42px; background: transparent; }
.segmentos button.activo { background: var(--panel); box-shadow: var(--shadow); color: var(--accent); }

.vacio { text-align: center; color: var(--muted); padding: 1.5rem 1rem; }
.cargando { color: var(--muted); padding: 1rem; }

/* ── Modal y toast ── */
dialog {
  border: 0; border-radius: 16px; padding: 0; width: min(560px, calc(100vw - 2rem));
  background: var(--panel); color: var(--text); box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
}
dialog::backdrop { background: rgba(20, 16, 14, .45); }
.modal-cuerpo { padding: 1.25rem; }
.modal-cuerpo h2 { margin-bottom: .75rem; }
.codigo-grande { font-family: var(--mono); font-size: clamp(2rem, 9vw, 3rem); font-weight: 800; color: var(--accent); letter-spacing: .08em; text-align: center; margin: .5rem 0 1rem; }

#toast {
  position: fixed; left: 50%; bottom: calc(90px + env(safe-area-inset-bottom)); transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: .75rem 1.1rem; border-radius: 10px; font-weight: 600;
  opacity: 0; pointer-events: none; transition: .2s; z-index: 50; max-width: calc(100vw - 2rem);
}
#toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.error { background: var(--danger); color: #fff; }

.lista-simple { list-style: none; padding: 0; margin: 0; }
.lista-simple li { display: flex; align-items: center; justify-content: space-between; gap: .5rem; padding: .5rem 0; border-bottom: 1px solid var(--line); }
.lista-simple li:last-child { border-bottom: 0; }

/* ── Impresión (informe de trazabilidad / etiqueta) ── */
@media print {
  body { background: #fff; color: #000; padding: 0; }
  .topbar, .no-print, #toast, .tabs { display: none !important; }
  main { padding: 0; max-width: none; }
  .panel { box-shadow: none; border: 0; padding: 0; }
  dialog[open] { position: static; box-shadow: none; width: auto; }
  body.imprimir-modal main { display: none; }
  body:not(.imprimir-modal) dialog { display: none; }
}