/* ---------------------------------------------------------------- tokens */
:root {
  --paper: #f1f0eb;        /* superficie de la tienda */
  --paper-2: #e6e4dc;      /* hueco, campos */
  --card: #fdfdfb;
  --line: #d3d0c5;
  --ink: #172126;
  --ink-2: #4b575c;
  --ink-3: #6f797d;

  --counter: #183038;      /* mostrador: panel de caja */
  --counter-2: #22414b;
  --counter-line: #2f5260;
  --counter-ink: #eaf0ee;
  --counter-ink-2: #a9bcbf;

  --accent: #f5c518;       /* acento: foco, cambio a devolver */
  --accent-ink: #1d1a0c;

  --go: #127a55;
  --go-press: #0d6144;
  --danger: #b3261e;
  --danger-bg: #f9e3e1;
  --warn: #8a4b00;
  --warn-bg: #fcebc8;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.375rem;
  --fs-xl: 2rem;

  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px;
  --r-sm: 6px;
  --r-md: 10px;
  --shadow: 0 1px 0 rgba(23, 33, 38, 0.06), 0 1px 3px rgba(23, 33, 38, 0.06);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --tap: 48px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-md);
  color: var(--ink);
  background: var(--paper);
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; }
img { display: block; max-width: 100%; }
.num { font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------------------------------------------------------------- botones */
.btn {
  min-height: var(--tap);
  padding: 0 var(--s4);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s2);
  text-decoration: none; color: var(--ink);
  transition: transform 80ms var(--ease), background 120ms var(--ease);
}
.btn:active { transform: scale(0.97); background: var(--paper-2); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--go); border-color: var(--go); color: #fff; }
.btn-primary:active { background: var(--go-press); }
.btn-dark { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-danger { color: var(--danger); border-color: #e2b4b0; }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-sm { min-height: 40px; padding: 0 var(--s3); font-size: var(--fs-sm); }
.icon { width: 22px; height: 22px; flex: none; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------------------------------------------------------- formularios */
.field { display: grid; gap: var(--s1); }
.field > span { font-size: var(--fs-sm); font-weight: 600; color: var(--ink-2); }
.field small { color: var(--ink-3); font-size: var(--fs-xs); }
.input {
  min-height: var(--tap);
  width: 100%;
  padding: 0 var(--s3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
}
textarea.input { padding: var(--s3); min-height: 80px; }
.input:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(245, 197, 24, 0.55); }

/* ---------------------------------------------------------------- precio */
.price { font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; color: var(--ink); white-space: nowrap; }

/* ---------------------------------------------------------------- toast y diálogos */
.toast {
  position: fixed; left: var(--s4); bottom: calc(var(--s4) + env(safe-area-inset-bottom));
  transform: translateY(20px); opacity: 0; pointer-events: none;
  background: var(--ink); color: #fff; border-radius: var(--r-md);
  padding: var(--s3) var(--s3) var(--s3) var(--s4);
  display: flex; align-items: center; gap: var(--s4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease);
  z-index: 50; max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast.error { background: var(--danger); }
.toast .btn { min-height: 40px; background: transparent; color: var(--accent); border-color: rgba(255,255,255,.3); }

dialog {
  border: none; border-radius: var(--r-md); padding: 0;
  width: min(560px, calc(100vw - 32px)); max-height: calc(100dvh - 32px);
  background: var(--card); color: var(--ink);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
dialog::backdrop { background: rgba(23, 33, 38, 0.5); }
.dlg-head { display: flex; align-items: center; justify-content: space-between; padding: var(--s4) var(--s5); border-bottom: 1px solid var(--line); }
.dlg-head h2 { margin: 0; font-size: var(--fs-lg); }
.dlg-body { padding: var(--s5); display: grid; gap: var(--s4); overflow: auto; }
.dlg-foot { display: flex; gap: var(--s3); justify-content: flex-end; padding: var(--s4) var(--s5); border-top: 1px solid var(--line); background: var(--paper); flex-wrap: wrap; }
.dlg-foot .spacer { flex: 1; }

/* ---------------------------------------------------------------- login */
.login {
  min-height: 100dvh; display: grid; place-items: center; padding: var(--s4);
  background: var(--counter); color: var(--counter-ink);
}
.login form { width: min(340px, 100%); display: grid; gap: var(--s4); text-align: center; }
.login h1 { margin: 0; font-size: var(--fs-lg); }
.login p { margin: 0; color: var(--counter-ink-2); }
.pin-dots { display: flex; justify-content: center; gap: var(--s3); height: 20px; }
.pin-dots i { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--counter-ink-2); }
.pin-dots i.on { background: var(--accent); border-color: var(--accent); }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s3); }
.keypad button {
  height: 64px; border-radius: var(--r-md); border: 1px solid var(--counter-line);
  background: var(--counter-2); color: var(--counter-ink); font-size: var(--fs-lg); font-weight: 600;
}
.keypad button:active { background: var(--counter-line); }
.keypad button.go { background: var(--go); border-color: var(--go); }
.login .error { color: #ffb4ab; font-weight: 600; min-height: 1.4em; }