:root {
  --ink: #1f2a24;
  --ink-soft: #56635b;
  --paper: #f1f4f1;
  --paper-raised: #ffffff;
  --line: #d7ded9;
  --accent: #3d6a5c;
  --accent-warm: #e2a354;
  --radius: 6px;
  --sombra: 0 2px 10px rgba(31, 42, 36, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Work Sans', system-ui, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 460px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  min-height: 100vh;
}

/* Selector de idioma: control segmentado, no botones sueltos */
.selector-idioma {
  display: flex;
  justify-content: flex-end;
  gap: 2px;
  margin-bottom: 2rem;
  padding: 3px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  width: fit-content;
  margin-left: auto;
}
.idioma-boton {
  width: auto;
  margin-top: 0;
  padding: 0.35rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: transparent;
  color: var(--ink-soft);
  border: none;
  border-radius: 4px;
  transition: background 0.15s ease, color 0.15s ease;
}
.idioma-boton.activo {
  background: var(--accent);
  color: white;
}

/* Barra de progreso */
.progreso {
  display: flex;
  gap: 4px;
  margin-bottom: 2rem;
}
.progreso .segmento {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--line);
}
.progreso .segmento.hecho {
  background: var(--accent-warm);
}

.paso-contador {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

h1 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

h2 {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 1.5rem;
}

p {
  color: var(--ink-soft);
  margin: 0 0 1rem;
}

/* Opciones tipo radio/checkbox */
.opcion {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 0.6rem;
  background: var(--paper-raised);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.opcion:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}
.opcion:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--paper-raised));
  box-shadow: 0 0 0 1px var(--accent);
}
.opcion input {
  accent-color: var(--accent);
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

input[type="number"], input[type="text"] {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  color: var(--ink);
  margin-bottom: 1rem;
  transition: border-color 0.15s ease;
}
input[type="number"]:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent);
}

button {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.95rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}
button:hover {
  background: color-mix(in srgb, var(--accent) 88%, black);
}
button:active {
  transform: scale(0.99);
}
button:disabled {
  background: var(--line);
  color: var(--ink-soft);
  cursor: not-allowed;
}

.boton-secundario {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.boton-secundario:hover {
  background: var(--paper-raised);
  color: var(--ink);
}

.pregunta-wrap {
  animation: entrada 0.25s ease;
}
@keyframes entrada {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.aviso {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  margin-top: 1rem;
  background: color-mix(in srgb, var(--accent-warm) 15%, var(--paper-raised));
  border: 1px solid var(--accent-warm);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 0.9rem;
  animation: entrada 0.2s ease;
}

/* Escala numérica */
.escala-fila {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}
.escala-boton {
  flex: 1;
  padding: 0.9rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
}
.escala-boton:hover {
  border-color: var(--accent);
}
.escala-boton.seleccionado {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
.escala-etiquetas {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
}

/* PVT */
.pvt-caja {
  height: 200px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--paper-raised);
  margin-bottom: 1rem;
  cursor: default;
  user-select: none;
  transition: background 0.15s ease;
}
.pvt-caja.activa {
  background: var(--accent-warm);
  color: white;
  cursor: pointer;
}

/* Pantalla del código anónimo */
.codigo-pantalla {
  text-align: center;
}
.codigo-numero {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1.5rem 0;
}
.qr-marco {
  display: inline-block;
  background: white;
  padding: 1rem;
  border-radius: var(--radius);
  box-shadow: var(--sombra);
  margin-bottom: 1.5rem;
}

.pantalla-gracias {
  text-align: center;
  padding-top: 3rem;
}
.pantalla-gracias .icono {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 12%, var(--paper-raised));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--accent);
}
.pantalla-gracias h1 {
  border-bottom: none;
  padding-bottom: 0;
}
.pantalla-gracias p {
  font-size: 1rem;
}