/* ===========
   Mobile-first UI para escáner de precios
   Optimizada para celulares y tablets
   =========== */

:root {
  --radius: 16px;
  --gap: 12px;
  --bg: #f7f7f8;
  --card: #ffffff;
  --text: #0c1116;
  --muted: #6b7280;
  --primary: #111827;
  --border: #e5e7eb;
  --shadow: 0 8px 28px rgba(0,0,0,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f13;
    --card: #0f141b;
    --text: #e5e7eb;
    --muted: #9aa3af;
    --primary: #e5e7eb;
    --border: #1f2937;
    --shadow: 0 10px 28px rgba(0,0,0,.35);
  }
}

/* Tipografía fluida y ajustes táctiles */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: clamp(15px, 1.6vw, 16px);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* Layout básico */
header {
  position: sticky; top: 0;
  z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--gap);
  padding: calc(12px + env(safe-area-inset-top, 0)) 16px 12px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 1.05rem; font-weight: 700; letter-spacing: .2px; }
main { padding: 14px; padding-bottom: calc(16px + env(safe-area-inset-bottom, 0)); max-width: 860px; margin: 0 auto; }

/* Panel contenedor */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}

/* Fila de controles */
.row {
  display: flex; align-items: center; gap: var(--gap); flex-wrap: wrap;
}

button, select, input {
  font: inherit;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 12px 14px;
  min-height: 44px;               /* tamaño táctil recomendado */
}

button {
  cursor: pointer;
  transition: transform .05s ease, opacity .15s ease, background .15s ease;
}
button:active { transform: translateY(1px); }
button.primary {
  background: var(--primary);
  color: #000000;
  border-color: var(--primary);
}
button.ghost { background: rgba(127,127,127,.06); }

input::placeholder { color: var(--muted); }
input, select { min-width: 200px; }

/* Estado de conexión y mensajes */
.muted { color: var(--muted); font-size: .92rem; }
.status { margin-top: 8px; min-height: 22px; font-weight: 600; }
.status.ok  { color: #0ea05d; }
.status.err { color: #d14343; }

/* Cámara */
#videoWrap {
  position: relative;
  margin-top: 10px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
}
#reader {
  width: 100%;
  /* Altura móvil/tablet: mostrás más contenido abajo */
  height: 52vh;          /* podés bajar a 48vh si querés aún más compacto */
  max-height: 420px;
}
#scanOverlay {
  position: absolute; inset: 0;
  pointer-events: none;
  border: 2px dashed rgba(255,255,255,.55);
  border-radius: var(--radius);
}
/* Línea de escaneo suave */
#scanOverlay::before {
  content: "";
  position: absolute; left: 6%; right: 6%; height: 2px; top: 15%;
  background: rgba(0,255,180,.85);
  box-shadow: 0 0 18px rgba(0,255,200,.7);
  border-radius: 2px;
  animation: scan 2.4s linear infinite;
}
@keyframes scan {
  0% { top: 15%; opacity: .9; }
  50% { top: 85%; opacity: .75; }
  100% { top: 15%; opacity: .9; }
}

/* Tarjeta de resultado */
.card {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  margin-top: 14px;
  padding: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  animation: pop .18s ease-out;
}
.card img {
  width: 110px; height: 110px; object-fit: cover;
  border-radius: 12px; background: #f3f3f3;
}
.name  { font-size: 1.05rem; font-weight: 800; line-height: 1.25; }
.sku   { color: var(--muted); font-size: .9rem; }
.price { font-size: clamp(1.6rem, 4.8vw, 2rem); font-weight: 900; margin-top: 6px; letter-spacing: .2px; }

@keyframes pop { from { transform: scale(.985); opacity:.0; } to { transform: scale(1); opacity:1; } }

/* Tips/banners */
.hint { font-size: .9rem; color: var(--muted); margin-top: 10px; }
.banner {
  background: #fff3cd; color: #856404; border: 1px solid #ffe08a;
  padding: 10px; border-radius: 10px; margin-top: 10px;
}
.hidden { display: none; }

/* Pie */
.footer {
  text-align: center;
  color: var(--muted);
  padding: 18px 14px calc(18px + env(safe-area-inset-bottom, 0));
  font-size: .9rem;
}

/* Accesibilidad y states */
:focus-visible { outline: 2px solid #22c55e; outline-offset: 2px; }
button[disabled] { opacity: .6; cursor: not-allowed; }

/* Ajustes responsivos */
@media (min-width: 480px) {
  .card { grid-template-columns: 120px 1fr; }
  .card img { width: 120px; height: 120px; }
}
@media (max-width: 380px) {
  .row { gap: 8px; }
  input, select { min-width: 140px; }
  .card { grid-template-columns: 1fr; }
  .card img { width: 100%; height: 180px; }
}

/* Modo oscuro: mejor visibilidad del overlay */
@media (prefers-color-scheme: dark) {
  #scanOverlay { border-color: rgba(255,255,255,.35); }
  #scanOverlay::before { background: rgba(0,255,200,.9); box-shadow: 0 0 14px rgba(0,255,200,.65); }
}

/* Reduce motion si el usuario lo pidió */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}