:root {
  --fondo: #f4f5f9;
  --superficie: #ffffff;
  --borde: #e5e7eb;
  --texto: #111827;
  --texto-suave: #6b7280;
  --texto-tenue: #9ca3af;
  --marca: #4f46e5;
  --marca-suave: #eef2ff;
  --ok: #059669;
  --ok-suave: #ecfdf5;
  --aviso: #d97706;
  --aviso-suave: #fffbeb;
  --error: #dc2626;
  --error-suave: #fef2f2;
  --sombra: 0 1px 3px rgba(17, 24, 39, .06), 0 8px 24px rgba(17, 24, 39, .06);
  --radio: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

a { color: var(--marca); }

h1, h2, h3 { margin: 0 0 4px; line-height: 1.25; }
h1 { font-size: 26px; }
h2 { font-size: 19px; }
h3 { font-size: 15px; }

.sutil { color: var(--texto-suave); }
.tenue { color: var(--texto-tenue); font-size: 13px; }
.mono { font-family: ui-monospace, Consolas, monospace; }
.oculto { display: none !important; }
.centrado { text-align: center; }

/* ----------------------------------------------------------- formularios */
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: #374151; }
.campo { margin-bottom: 14px; }
.campo-ayuda { font-size: 12px; color: var(--texto-tenue); margin-top: 4px; }

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--borde);
  border-radius: 10px;
  font: inherit;
  font-size: 14px;
  background: #fff;
  color: var(--texto);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--marca);
  outline-offset: -1px;
  border-color: var(--marca);
}
textarea { min-height: 76px; resize: vertical; }
input[type="color"] { padding: 4px; height: 42px; }
input[type="file"] { padding: 8px; background: #fafafa; }

.fila { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.fila-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 620px) { .fila, .fila-3 { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--marca);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: filter .15s, background .15s;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .55; cursor: not-allowed; filter: none; }
.btn.secundario { background: #fff; color: var(--texto); border-color: var(--borde); }
.btn.secundario:hover { background: #f9fafb; filter: none; }
.btn.peligro { background: var(--error); }
.btn.exito { background: var(--ok); }
.btn.pequeno { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn.ancho { width: 100%; }

/* --------------------------------------------------------------- tarjetas */
.tarjeta {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 20px;
  box-shadow: var(--sombra);
}
.tarjeta + .tarjeta { margin-top: 16px; }
.tarjeta-cab { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }

/* --------------------------------------------------------------- etiquetas */
.pastilla {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.pastilla.gris   { background: #f3f4f6; color: #4b5563; }
.pastilla.verde  { background: var(--ok-suave); color: var(--ok); }
.pastilla.azul   { background: var(--marca-suave); color: var(--marca); }
.pastilla.ambar  { background: var(--aviso-suave); color: var(--aviso); }
.pastilla.roja   { background: var(--error-suave); color: var(--error); }

/* ----------------------------------------------------------------- tablas */
.tabla-envoltura { overflow-x: auto; border: 1px solid var(--borde); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--borde); white-space: nowrap; }
th { background: #fafafb; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--texto-suave); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fafafb; }

/* ---------------------------------------------------------------- avisos */
.aviso { padding: 12px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 14px; }
.aviso.error { background: var(--error-suave); color: #991b1b; }
.aviso.ok { background: var(--ok-suave); color: #065f46; }
.aviso.info { background: var(--marca-suave); color: #3730a3; }
.aviso.atencion { background: var(--aviso-suave); color: #92400e; }

/* --------------------------------------------------------------- notificacion */
#notificaciones { position: fixed; right: 16px; bottom: 16px; z-index: 60; display: flex; flex-direction: column; gap: 8px; max-width: 340px; }
.notificacion {
  background: #111827; color: #fff; padding: 12px 16px; border-radius: 10px;
  font-size: 14px; box-shadow: 0 10px 25px rgba(0,0,0,.2); animation: entrar .2s ease;
}
.notificacion.error { background: var(--error); }
.notificacion.ok { background: var(--ok); }
@keyframes entrar { from { opacity: 0; transform: translateY(8px); } }

/* ----------------------------------------------------------------- modal */
.modal-fondo {
  position: fixed; inset: 0; background: rgba(17,24,39,.5); z-index: 50;
  display: flex; align-items: center; justify-content: center; padding: 16px;
  overflow-y: auto;
}
.modal {
  background: #fff; border-radius: 16px; padding: 24px;
  width: 100%; max-width: 520px; max-height: 90vh; overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.modal-cab { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.cerrar { background: none; border: 0; font-size: 26px; line-height: 1; cursor: pointer; color: var(--texto-tenue); padding: 0 4px; }

/* ------------------------------------------------------------- metricas */
.metricas { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.metrica { background: var(--superficie); border: 1px solid var(--borde); border-radius: 12px; padding: 16px; }
.metrica .valor { font-size: 30px; font-weight: 700; line-height: 1.1; }
.metrica .nombre { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--texto-suave); margin-top: 4px; }

/* ---------------------------------------------------- selector de estilos */
.estilos-cupon { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.estilo-op { text-align: left; background: #fff; border: 2px solid var(--borde); border-radius: 12px; padding: 10px; cursor: pointer; display: flex; flex-direction: column; gap: 5px; font: inherit; }
.estilo-op:hover { border-color: var(--texto-tenue); }
.estilo-op.sel { border-color: var(--marca); box-shadow: 0 0 0 3px var(--marca-suave); }
.estilo-op strong { font-size: 13.5px; }
.estilo-op small { color: var(--texto-suave); font-size: 11.5px; }
.estilo-op .mini { height: 48px; border-radius: 8px; border: 1px solid var(--borde); position: relative; overflow: hidden; }
.estilo-op .mini::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 50%; background: #fff; }
.mini-clasico { background: var(--c); }
.mini-moderno { background: linear-gradient(135deg, var(--c), rgba(0,0,0,.55)); }
.mini-festivo { background: var(--c); border-style: dashed !important; border-width: 2px !important; }
.mini-minimal { background: #fff; border-bottom: 4px solid var(--c) !important; }
.mini-minimal::after { display: none; }