/* Generador de Código de Barras — tema "etiqueta realista" */
:root {
  --tinta: #101418;
  --tinta-suave: #4b5560;
  --papel: #ffffff;
  --fondo: #f6f5f2;
  --linea: #e4e1da;
  --acento: #ff5a36;
  --acento-oscuro: #d63c1e;
  --ok: #0e8a5f;
  --error: #c92a2a;
  --radio: 12px;
  --sombra-1: 0 1px 2px rgba(16, 20, 24, .06), 0 4px 14px rgba(16, 20, 24, .07);
  --sombra-2: 0 2px 4px rgba(16, 20, 24, .08), 0 14px 34px rgba(16, 20, 24, .12);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  background:
    linear-gradient(180deg, var(--fondo) 0%, #efede8 100%);
  color: var(--tinta);
  line-height: 1.6;
  min-height: 100vh;
}

:focus-visible { outline: 3px solid var(--acento); outline-offset: 2px; }

/* ---------- Cabecera ---------- */
.cabecera {
  position: sticky; top: 0; z-index: 10;
  background: rgba(246, 245, 242, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--linea);
}
.nav {
  max-width: 1080px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.marca {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 800; letter-spacing: .22em; font-size: 15px;
}
.marca svg { width: 22px; height: 22px; color: var(--acento); }
.nav-enlaces { display: flex; gap: 26px; list-style: none; }
.nav-enlaces a {
  color: var(--tinta-suave); text-decoration: none; font-size: 14px;
  font-weight: 600; letter-spacing: .04em; transition: color .18s;
}
.nav-enlaces a:hover { color: var(--tinta); }

/* ---------- Hero ---------- */
.hero { max-width: 780px; margin: 0 auto; padding: 56px 24px 34px; text-align: center; }
.hero-kicker {
  font-size: 11px; font-weight: 700; letter-spacing: .28em;
  color: var(--acento); margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 58px); line-height: 1.05;
  letter-spacing: -.02em; font-weight: 800;
}
.hero-sub {
  margin-top: 18px; font-size: clamp(15px, 2vw, 18px);
  color: var(--tinta-suave);
}

/* ---------- Tool ---------- */
.tool {
  max-width: 1080px; margin: 26px auto 60px; padding: 0 24px;
  display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 22px;
  align-items: start;
}
.etiqueta {
  background: var(--papel);
  border-radius: var(--radio);
  box-shadow: var(--sombra-2);
  padding: 22px 22px 18px;
  position: relative;
}
.etiqueta::before {
  content: "";
  position: absolute; inset: 8px;
  border: 1.5px dashed #eceae4; border-radius: 8px;
  pointer-events: none;
}
.etiqueta > * { position: relative; }

.etiqueta-cabecera {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 16px;
}
.tipo-selector {
  display: inline-flex; background: var(--fondo);
  border: 1px solid var(--linea); border-radius: 999px; padding: 4px;
}
.tipo-btn {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 13px; font-weight: 700; letter-spacing: .06em;
  color: var(--tinta-suave); padding: 9px 18px; border-radius: 999px;
  transition: all .2s;
}
.tipo-btn.is-activo {
  background: var(--tinta); color: #fff;
  box-shadow: 0 2px 6px rgba(16, 20, 24, .3);
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1.5px solid var(--tinta); background: transparent; color: var(--tinta);
  font: inherit; font-size: 13px; font-weight: 700; letter-spacing: .03em;
  padding: 9px 16px; border-radius: 999px; cursor: pointer;
  min-height: 44px; transition: all .2s;
}
.btn-ghost svg { width: 16px; height: 16px; }
.btn-ghost:hover { background: var(--tinta); color: #fff; transform: translateY(-1px); }

.campo-label {
  display: block; font-size: 11px; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--tinta-suave); margin-bottom: 8px;
}
#codigo {
  width: 100%; font-family: var(--mono); font-size: 20px; font-weight: 600;
  letter-spacing: .08em; color: var(--tinta);
  padding: 13px 16px; border: 2px solid var(--linea); border-radius: 10px;
  background: var(--fondo); transition: border-color .2s, box-shadow .2s;
}
#codigo:focus {
  outline: none; border-color: var(--tinta);
  box-shadow: 0 0 0 4px rgba(16, 20, 24, .07);
}
#codigo::placeholder { color: #b3afa6; font-weight: 400; }

.feedback { min-height: 24px; font-size: 13.5px; font-weight: 600; margin-top: 8px; }
.feedback.es-ok { color: var(--ok); }
.feedback.es-error { color: var(--error); }
.feedback.es-aviso { color: var(--tinta-suave); }

.lienzo {
  display: block; width: 100%;
  border: 1px solid var(--linea); border-radius: 10px;
  background: var(--papel); margin-top: 6px;
}

.controles {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  margin-top: 16px;
}
.control label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 12px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--tinta-suave); margin-bottom: 6px;
}
.control output {
  font-family: var(--mono); font-size: 14px; color: var(--tinta);
  background: var(--fondo); border: 1px solid var(--linea);
  padding: 1px 8px; border-radius: 6px;
}
input[type="range"] {
  width: 100%; height: 44px; appearance: none; background: transparent; cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 5px; border-radius: 3px;
  background: linear-gradient(90deg, var(--tinta), #6b7480);
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--papel); border: 3px solid var(--tinta);
  margin-top: -8.5px; box-shadow: 0 2px 6px rgba(16, 20, 24, .25);
  transition: transform .15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-moz-range-track { height: 5px; border-radius: 3px; background: var(--tinta-suave); }
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--papel); border: 3px solid var(--tinta);
}

.acciones { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.btn-primario, .btn-secundario {
  flex: 1; min-width: 160px; min-height: 46px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font: inherit; font-size: 14.5px; font-weight: 700; letter-spacing: .04em;
  border-radius: 10px; cursor: pointer; transition: all .2s;
}
.btn-primario { border: 0; background: var(--acento); color: #fff; box-shadow: 0 4px 14px rgba(255, 90, 54, .35); }
.btn-primario:hover:not(:disabled) { background: var(--acento-oscuro); transform: translateY(-1px); }
.btn-secundario { border: 2px solid var(--tinta); background: transparent; color: var(--tinta); }
.btn-secundario:hover:not(:disabled) { background: var(--tinta); color: #fff; }
.btn-primario:disabled, .btn-secundario:disabled {
  opacity: .38; cursor: not-allowed; box-shadow: none;
}
.btn-primario svg, .btn-secundario svg { width: 17px; height: 17px; }
.atajo-hint {
  margin-top: 10px; font-size: 11.5px; color: #a29d93;
  letter-spacing: .04em; text-align: center;
}

/* ---------- Historial ---------- */
.panel-historial {
  background: var(--papel); border-radius: var(--radio);
  box-shadow: var(--sombra-1); padding: 18px;
}
.historial-cabecera { display: flex; justify-content: space-between; align-items: center; }
.panel-historial h2 {
  font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--tinta-suave);
}
.btn-mini {
  border: 0; background: none; color: var(--acento); font: inherit;
  font-size: 12px; font-weight: 700; cursor: pointer; padding: 4px;
}
.btn-mini:hover { text-decoration: underline; }
.historial-lista { list-style: none; margin-top: 12px; display: grid; gap: 8px; }
.historial-item {
  width: 100%; text-align: left; font-family: var(--mono); font-size: 14px;
  padding: 10px 12px; border: 1px solid var(--linea); border-radius: 8px;
  background: var(--fondo); color: var(--tinta); cursor: pointer;
  overflow-wrap: anywhere; transition: all .18s;
}
.historial-item:hover { border-color: var(--tinta); transform: translateX(3px); }
.historial-vacio {
  margin-top: 12px; font-size: 13px; color: #a29d93;
}
.historial-lista:not(:empty) + .historial-vacio { display: none; }

/* ---------- Contenido ---------- */
.contenido { max-width: 800px; margin: 0 auto; padding: 0 24px 70px; }
.bloque { margin-bottom: 56px; }
.bloque h2 {
  font-size: clamp(22px, 3vw, 30px); letter-spacing: -.01em;
  margin-bottom: 18px; font-weight: 800;
}
.bloque p, .bloque li { color: var(--tinta-suave); font-size: 15.5px; }
.bloque code {
  font-family: var(--mono); font-size: 14px; background: #edece7;
  padding: 1px 6px; border-radius: 5px; color: var(--tinta);
}
.pasos { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; counter-reset: paso; }
.pasos li {
  background: var(--papel); border: 1px solid var(--linea);
  border-radius: var(--radio); padding: 18px;
  box-shadow: var(--sombra-1);
}
.pasos h3 {
  font-size: 14px; font-weight: 800; letter-spacing: .05em;
  color: var(--acento); margin-bottom: 6px;
}
.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 18px; }
.tarjeta {
  background: var(--papel); border: 1px solid var(--linea);
  border-left: 4px solid var(--acento);
  border-radius: var(--radio); padding: 18px;
  box-shadow: var(--sombra-1);
}
.tarjeta h3 { font-size: 15.5px; margin-bottom: 8px; }
.consejo {
  background: #fff7ed; border: 1px solid #fed7aa; border-radius: 10px;
  padding: 14px 18px; font-size: 15px;
}
details {
  background: var(--papel); border: 1px solid var(--linea);
  border-radius: 10px; margin-bottom: 10px; overflow: hidden;
}
summary {
  cursor: pointer; font-weight: 700; font-size: 15px;
  padding: 15px 18px; list-style-position: inside;
  transition: background .15s;
}
summary:hover { background: var(--fondo); }
details p { padding: 0 18px 16px; }
.cta {
  text-align: center; background: var(--tinta); color: #fff;
  border-radius: var(--radio); padding: 40px 24px;
}
.cta h2 { color: #fff; }
.cta p { color: #b8bec6; max-width: 480px; margin: 0 auto; }
.enlace-cta { color: var(--acento); font-weight: 700; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.enlace-cta:hover { color: #ff8064; }

/* ---------- Pie ---------- */
.pie {
  border-top: 1px solid var(--linea); background: var(--papel);
  padding: 30px 24px; text-align: center;
}
.pie-marca { font-size: 13px; font-weight: 700; letter-spacing: .1em; }
.pie nav { margin-top: 12px; display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; }
.pie a { color: var(--tinta-suave); font-size: 13.5px; text-decoration: none; }
.pie a:hover { color: var(--tinta); text-decoration: underline; }

@media (max-width: 900px) {
  .tool { grid-template-columns: 1fr; }
  .panel-historial { order: 2; }
}
@media (max-width: 600px) {
  .hero { padding-top: 40px; }
  .nav-enlaces { display: none; }
  .controles { grid-template-columns: 1fr; }
  .etiqueta { padding: 16px 14px 14px; }
}