/* laberintos.css — Picasita Laberintos Form Styles */
/* Paleta teal accesible. Contraste AA garantizado:
   - Texto #1A2B2A sobre blanco/bg: >7:1
   - Blanco sobre --color-btn (#0E6B65): ~5.6:1 (AA ✓)
   - --color-primary-dk (#1B7A73) sobre blanco: ~4.8:1 (AA ✓)
   - Texto muted (#5A6E6D) sobre blanco: ~4.6:1 (AA ✓) */

:root {
  /* Teal de acento — solo decorativo (borde, radio accent-color) */
  --color-primary:     #4ECDC4;
  /* Teal oscuro para texto y bordes de foco */
  --color-primary-dk:  #1B7A73;
  /* Botón: teal muy oscuro, contraste blanco ≥ 4.5:1 */
  --color-btn:         #0E6B65;
  --color-btn-hover:   #0A504B;
  /* Texto base oscuro sobre bg claro */
  --color-dark:        #1A2B2A;
  /* Texto secundario: contraste AA sobre blanco */
  --color-muted:       #5A6E6D;
  --color-bg:          #F6FAFA;
  --color-surface:     #FFFFFF;
  --color-border:      #C5DEDE;
  --color-error-bg:    #FFF0F0;
  --color-error-text:  #991B1B;
  --color-error-bdr:   #DC2626;
  --radius:            10px;
  --radius-sm:         6px;
  --shadow:            0 2px 12px rgba(26,43,42,.08);
  /* Anillo de foco visible */
  --focus-ring:        0 0 0 3px rgba(14,107,101,.35);
}

/* ---- Reset ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---- Utilidad screen-reader only ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-dark);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  padding: 2rem 1rem;
}

/* ---- Page wrapper ---- */
.page {
  max-width: 640px;
  margin: 0 auto;
}

/* ---- Header ---- */
.site-header {
  text-align: center;
  margin-bottom: 2rem;
}

.site-header .logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  /* #1B7A73 sobre #F6FAFA: contraste ~4.8:1 AA ✓ */
  color: var(--color-primary-dk);
  letter-spacing: -0.5px;
}

.site-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-top: 0.25rem;
}

.site-header .subtitle {
  /* #5A6E6D sobre #F6FAFA: ~4.6:1 AA ✓ */
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* ---- Fun fact banner ---- */
.fun-fact {
  background: linear-gradient(135deg, #E0F5F4 0%, #CCF0EE 100%);
  border-left: 4px solid var(--color-primary-dk);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  /* texto sobre fondo claro ≈ #CCF0EE: #1B7A73 contraste ~4.8:1 AA ✓ */
  color: var(--color-primary-dk);
  margin-bottom: 1.75rem;
}

.fun-fact strong {
  font-weight: 600;
}

/* ---- Card ---- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  border: 1px solid var(--color-border);
}

/* ---- Error banner ---- */
.error-banner {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-bdr);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  /* #991B1B sobre #FFF0F0: ~6.9:1 AAA ✓ */
  color: var(--color-error-text);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.error-banner::before {
  content: "⚠";
  flex-shrink: 0;
  font-size: 1.1rem;
}

/* ---- Section titles ---- */
.section-title {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin: 1.5rem 0 0.75rem;
}

/* ---- Fieldset reset + presets fieldset ---- */
fieldset {
  border: none;
  padding: 0;
  min-width: 0;
}

.fieldset-presets > .section-title:first-of-type,
.fieldset-presets > legend {
  margin-top: 0;
}

/* ---- Preset grid ---- */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.preset-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.55rem 0.75rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  transition: border-color 0.15s, background 0.15s;
  background: var(--color-bg);
}

.preset-label:hover {
  border-color: var(--color-primary-dk);
  background: #EAF7F6;
}

.preset-label input[type="radio"] {
  accent-color: var(--color-primary-dk);
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

/* Focus visible en el radio dentro del label-card */
.preset-label input[type="radio"]:focus-visible {
  outline: 3px solid var(--color-btn);
  outline-offset: 2px;
}

.preset-label input[type="radio"]:checked + .preset-name {
  color: var(--color-primary-dk);
  font-weight: 600;
}

.preset-label:has(input:checked) {
  border-color: var(--color-primary-dk);
  background: #D8F2F0;
}

.preset-name {
  line-height: 1.3;
}

/* Modo Extremo: destaca como AVISO (rojo) sin imitar el "seleccionado" de los
   demás radios. Sin elegir → borde DISCONTINUO y SIN relleno (no parece activo);
   al seleccionarlo → sólido + relleno rojo (inequívocamente elegido). */
.preset-extremo,
.preset-extremo:hover {
  border-style: dashed;
  border-color: #B91C1C;
  background: var(--color-bg);
}
.preset-extremo .preset-name {
  color: #991B1B;
  font-weight: 700;
}
.preset-extremo:has(input:checked) {
  border-style: solid;
  border-color: #991B1B;
  background: #FEE2E2;
}

/* ---- Manual / advanced section ---- */
.manual-section {
  margin-top: 1rem;
}

.fieldset-manual {
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius-sm) !important;
  padding: 1rem !important;
}

.fieldset-manual legend {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-muted);
  padding: 0 0.4rem;
}

.row-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

/* ---- Form controls ---- */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-dark);
}

.field input[type="number"],
.field select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--color-dark);
  background: var(--color-surface);
  transition: border-color 0.15s;
  appearance: none;
}

.field input[type="number"]:focus-visible,
.field select:focus-visible {
  outline: none;
  border-color: var(--color-primary-dk);
  box-shadow: var(--focus-ring);
}

/* Fallback para navegadores sin :focus-visible */
.field input[type="number"]:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-primary-dk);
  box-shadow: var(--focus-ring);
}

/* ---- Divider ---- */
.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ---- Bottom controls fieldset ---- */
.fieldset-controls {
  margin-top: 1.5rem;
}

/* ---- Bottom controls ---- */
.controls-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.field-cantidad {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.field-cantidad label {
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-dark);
}

.field-cantidad input[type="number"] {
  width: 5rem;
  padding: 0.45rem 0.6rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-dark);
}

.field-cantidad input[type="number"]:focus-visible {
  outline: none;
  border-color: var(--color-primary-dk);
  box-shadow: var(--focus-ring);
}

.field-cantidad input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary-dk);
  box-shadow: var(--focus-ring);
}

.field-soluciones {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
  color: var(--color-dark);
}

/* "Compactar soluciones" atenuado cuando está deshabilitado (sin "Incluir soluciones"). */
.field-soluciones:has(input:disabled) {
  opacity: 0.5;
  cursor: not-allowed;
}

.field-soluciones input[type="checkbox"] {
  accent-color: var(--color-btn);
  width: 1.1rem;
  height: 1.1rem;
  cursor: pointer;
}

.field-soluciones input[type="checkbox"]:focus-visible {
  outline: 3px solid var(--color-btn);
  outline-offset: 2px;
}

/* ---- Generate button ---- */
.btn-generate {
  margin-left: auto;
  padding: 0.7rem 1.75rem;
  /* #0E6B65 con texto blanco: contraste ~5.6:1 AA ✓ */
  background: var(--color-btn);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}

.btn-generate:hover {
  background: var(--color-btn-hover);
  transform: translateY(-1px);
}

.btn-generate:active {
  transform: translateY(0);
}

.btn-generate:focus-visible {
  outline: 3px solid var(--color-btn);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(14,107,101,.25);
}

.btn-generate:disabled {
  background: var(--color-muted);
  cursor: not-allowed;
  transform: none;
}

/* ---- Extremo section ---- */
/* Color tokens para Modo Extremo:
   --color-extremo-bg     (#1A0000): negro-rojo muy oscuro
   --color-extremo-border (#8B0000): rojo sangre para borde
   --color-extremo-btn    (#B00000): rojo oscuro, contraste blanco ≥ 5.1:1 (AA ✓)
   --color-extremo-hover  (#8B0000): rojo sangre más oscuro, contraste blanco ≥ 7.2:1 (AA ✓)
   --color-extremo-text   (#3D0000): texto oscuro sobre fondo warning suave (AA ✓)
   --color-extremo-warn   (#FFF0EC): fondo advertencia suave, contraste de texto #3D0000 ≥ 8.5:1 (AAA ✓)
*/
:root {
  --color-extremo-bg:     #1A0000;
  --color-extremo-border: #8B0000;
  --color-extremo-btn:    #B00000;
  --color-extremo-hover:  #8B0000;
  --color-extremo-text:   #3D0000;
  --color-extremo-warn:   #FFF0EC;
  --focus-ring-extremo:   0 0 0 3px rgba(139,0,0,.4);
}

/* (El Modo Extremo ya no es un botón aparte: es el radio .preset-extremo del
   selector superior. Estilos del botón antiguo eliminados.) */

/* ---- Footer note ---- */
.footer-note {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.footer-note a {
  color: var(--color-primary-dk);
}

.footer-note a:focus-visible {
  outline: 2px solid var(--color-btn);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .card {
    padding: 1.25rem;
  }

  .presets-grid {
    grid-template-columns: 1fr 1fr;
  }

  .row-fields {
    grid-template-columns: 1fr;
  }

  .controls-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-generate {
    width: 100%;
    text-align: center;
    margin-left: 0;
  }
}