/* =================================================================
   Bingo — Generador + Cantador
   Hoja de estilos limpia y neutra, basada en variables CSS para
   facilitar el re-estilizado posterior desde otra IA / diseñador.
   ================================================================= */

/* ---------- Variables globales (re-estilizable desde aquí) ---------- */
:root {
  /* Paleta */
  --color-primario: #3c5aa0;
  --color-primario-osc: #2d4680;
  --color-primario-claro: #e8eef9;
  --color-acento: #f5a623;
  --color-acento-osc: #d68910;

  --color-fondo: #f4f6fb;
  --color-fondo-panel: #ffffff;
  --color-fondo-input: #ffffff;
  --color-fondo-libre: #e6e6e6;

  --color-texto: #222831;
  --color-texto-claro: #555e6b;
  --color-texto-contraste: #ffffff;

  --color-borde: #d0d7e2;
  --color-borde-osc: #9aa6b8;
  --color-error: #c0392b;
  --color-error-fondo: #fdecea;
  --color-exito: #27ae60;
  --color-aviso: #8a6d3b;
  --color-aviso-fondo: #fcf8e3;
  --color-info-fondo: #e7f0fa;

  /* Tipografía */
  --fuente-principal: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --fuente-titulos: var(--fuente-principal);

  /* Espaciados */
  --radio: 6px;
  --radio-sm: 4px;
  --margen: 16px;
  --sombra-suave: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --sombra-media: 0 4px 12px rgba(0,0,0,0.08);
}

/* ---------- Reset suave ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--fuente-principal);
  color: var(--color-texto);
  background: var(--color-fondo);
  line-height: 1.5;
  font-size: 15px;
  min-height: 100vh;
}
h1, h2, h3, h4 { margin: 0 0 var(--margen) 0; font-family: var(--fuente-titulos); font-weight: 600; }
p { margin: 0 0 var(--margen) 0; }
button { font-family: inherit; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-primario); color: #fff; padding: 8px 16px;
  z-index: 999;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- Layout ---------- */
.contenedor {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.cabecera-app {
  background: var(--color-primario);
  color: var(--color-texto-contraste);
  padding: 16px 0 0;
  box-shadow: var(--sombra-suave);
}
.cabecera-titulo { font-size: 26px; margin: 0; }
.cabecera-subtitulo { font-size: 14px; opacity: 0.85; margin: 4px 0 16px 0; }

.tabs {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  border-bottom: none;
  flex-wrap: wrap;
}
.tab-button {
  background: transparent;
  color: rgba(255,255,255,0.75);
  border: 1px solid transparent;
  border-bottom: none;
  padding: 10px 18px;
  cursor: pointer;
  border-radius: 6px 6px 0 0;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.tab-button:hover { background: rgba(255,255,255,0.1); color: #fff; }
.tab-button.tab-activa {
  background: var(--color-fondo);
  color: var(--color-texto);
  border-color: var(--color-borde);
  border-bottom: 1px solid var(--color-fondo);
  position: relative;
  top: 1px;
}

.pie-app {
  text-align: center;
  padding: 24px 16px;
  color: var(--color-texto-claro);
  font-size: 13px;
}

/* ---------- Paneles ---------- */
.tab-panel { padding: 24px 0; }
.oculto { display: none !important; }

.panel-titulo { font-size: 22px; color: var(--color-primario-osc); }
.panel-descripcion { color: var(--color-texto-claro); margin-bottom: 24px; }

/* ---------- Bloques de configuración ---------- */
.bloque-config {
  background: var(--color-fondo-panel);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio);
  padding: 16px 20px;
  margin-bottom: 16px;
  box-shadow: var(--sombra-suave);
}
.bloque-config > legend {
  font-weight: 600;
  color: var(--color-primario-osc);
  padding: 0 8px;
  font-size: 15px;
}
.sub-bloque {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-borde);
}
.sub-bloque.oculto { display: none; }

/* ---------- Campos ---------- */
.campo-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-texto);
  margin-bottom: 4px;
}
.campo-input, .campo-select, .campo-textarea {
  display: block;
  width: 100%;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--color-texto);
  background: var(--color-fondo-input);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-sm);
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.campo-input:focus, .campo-select:focus, .campo-textarea:focus {
  outline: none;
  border-color: var(--color-primario);
  box-shadow: 0 0 0 3px var(--color-primario-claro);
}
.campo-textarea { resize: vertical; font-family: var(--fuente-principal); }
.campo-input:disabled, .campo-select:disabled {
  background: #f0f2f5;
  color: var(--color-texto-claro);
  cursor: not-allowed;
}

.campo-grupo { margin-bottom: 14px; }
.campo-grupo:last-child { margin-bottom: 0; }

.ayuda {
  font-size: 12px;
  color: var(--color-texto-claro);
  margin: 4px 0 0 0;
}
.ayuda-inline { font-size: 12px; color: var(--color-texto-claro); margin-left: 8px; }

/* Radio group */
.radio-grupo {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
}
.radio-label input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--color-primario);
  cursor: pointer;
}

/* Switch */
.switch-grupo { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.switch-grupo .campo-label { margin-bottom: 0; }
.switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #ccc;
  border-radius: 24px;
  transition: background 0.2s;
}
.slider::before {
  content: "";
  position: absolute;
  height: 18px; width: 18px;
  left: 3px; bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.switch input:checked + .slider { background: var(--color-primario); }
.switch input:checked + .slider::before { transform: translateX(18px); }
.switch input:disabled + .slider { opacity: 0.4; cursor: not-allowed; }

/* ---------- Botones ---------- */
.boton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radio-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  text-decoration: none;
  background: #fff;
  color: var(--color-texto);
}
.boton:active { transform: translateY(1px); }
.boton:disabled { opacity: 0.5; cursor: not-allowed; }

.boton-primario {
  background: var(--color-primario);
  color: var(--color-texto-contraste);
  border-color: var(--color-primario-osc);
}
.boton-primario:hover:not(:disabled) { background: var(--color-primario-osc); }

.boton-secundario {
  background: #fff;
  color: var(--color-texto);
  border-color: var(--color-borde);
}
.boton-secundario:hover:not(:disabled) {
  background: var(--color-primario-claro);
  border-color: var(--color-borde-osc);
}

.boton-grande { padding: 14px 28px; font-size: 16px; }

.acciones-principales {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 16px 0;
}
.cantador-acciones { justify-content: center; }

/* ---------- Avisos / Errores ---------- */
.aviso {
  padding: 10px 14px;
  border-radius: var(--radio-sm);
  background: var(--color-aviso-fondo);
  color: var(--color-aviso);
  border: 1px solid #e0d4a5;
  font-size: 14px;
  margin-bottom: 16px;
}
.aviso-info {
  background: var(--color-info-fondo);
  color: var(--color-primario-osc);
  border-color: #c3d5ef;
}
.error-msg {
  display: block;
  background: var(--color-error-fondo);
  color: var(--color-error);
  border: 1px solid #f5c6c0;
  padding: 6px 10px;
  border-radius: var(--radio-sm);
  font-size: 13px;
  margin-top: 4px;
  margin-bottom: 8px;
}

kbd {
  display: inline-block;
  padding: 1px 6px;
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-family: monospace;
  font-size: 12px;
}

/* ---------- Vista previa de cartones ---------- */
.vista-previa {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 2px solid var(--color-borde);
}
.vista-previa-titulo {
  font-size: 18px;
  color: var(--color-texto);
  margin-bottom: 12px;
}
.vista-previa-count {
  font-size: 14px;
  color: var(--color-texto-claro);
  font-weight: normal;
  margin-left: 8px;
}
.vista-previa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

/* ---------- Cartón de bingo ---------- */
.carton-wrap {
  background: var(--color-fondo-panel);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio);
  padding: 10px;
  box-shadow: var(--sombra-suave);
}
.carton-mini { font-size: 12px; }

.carton-numero {
  font-size: 11px;
  color: var(--color-texto-claro);
  margin-bottom: 4px;
  text-align: right;
}
.carton-titulo {
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 6px;
  color: var(--color-primario-osc);
}

.carton-bingo {
  display: grid;
  gap: 2px;
  background: var(--color-borde);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-sm);
  overflow: hidden;
}
.carton-celda {
  background: #fff;
  padding: 6px 4px;
  text-align: center;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  word-break: break-word;
}
.carton-encabezado {
  background: var(--color-primario);
  color: var(--color-texto-contraste);
  font-weight: 700;
  font-size: 14px;
  min-height: 26px;
}
.carton-libre {
  background: var(--color-fondo-libre);
  font-weight: 700;
  color: var(--color-texto-claro);
  font-size: 11px;
}

/* ---------- Cantador ---------- */
.panel-cantador {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cantador-display {
  background: #111;
  color: #fff;
  border-radius: var(--radio);
  padding: 40px 24px;
  text-align: center;
  box-shadow: var(--sombra-media);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 12px;
}
.cantador-display-grande {
  font-size: clamp(60px, 18vw, 240px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  word-break: break-word;
  text-shadow: 0 2px 8px rgba(245, 166, 35, 0.5);
}
.cantador-display-sub {
  font-size: clamp(14px, 2vw, 22px);
  opacity: 0.8;
}
.cantador-progreso {
  font-size: clamp(14px, 1.6vw, 20px);
  background: rgba(255,255,255,0.15);
  padding: 4px 16px;
  border-radius: 999px;
}

.cantador-historial {
  background: var(--color-fondo-panel);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio);
  padding: 16px;
  box-shadow: var(--sombra-suave);
}
.historial-titulo { font-size: 16px; margin-bottom: 10px; }
.historial-lista {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
  padding: 4px;
}
.historial-item {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primario-claro);
  border: 1px solid #c3d5ef;
  border-radius: var(--radio-sm);
  padding: 6px 10px;
  font-size: 14px;
}
.historial-item-indice {
  background: var(--color-primario);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 999px;
  min-width: 22px;
  text-align: center;
}
.historial-item-valor {
  font-weight: 500;
  word-break: break-word;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .tab-button { padding: 8px 12px; font-size: 13px; }
  .vista-previa-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .cantador-display { padding: 24px 16px; min-height: 180px; }
  .acciones-principales { flex-direction: column; }
  .acciones-principales .boton { width: 100%; }
}

@media (max-width: 480px) {
  .vista-previa-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .historial-lista { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
}

/* ---------- Print (cuando se imprime directamente la página principal — normalmente usamos la ventana dedicada) ---------- */
@media print {
  .cabecera-app, .pie-app, .tabs, .bloque-config, .acciones-principales, .aviso, .vista-previa-titulo, #gen-aviso { display: none !important; }
  .vista-previa-grid { grid-template-columns: repeat(2, 1fr); }
}