:root {
  --color-brand: #b5451b;
  --color-brand-dark: #8a3414;
  --color-bg: #f4f1ee;
  --color-surface: #ffffff;
  --color-text: #2a2420;
  --color-muted: #776f68;
  --color-border: #ddd6ce;
  --color-success: #2e7d32;
  --color-danger: #c0392b;
  --color-warning: #b8860b;
  --touch-size: 56px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

button, input, select {
  font-family: inherit;
  font-size: 16px;
}

button {
  min-height: var(--touch-size);
  border: none;
  border-radius: 10px;
  background: var(--color-brand);
  color: #fff;
  padding: 0 18px;
  font-weight: 600;
  cursor: pointer;
  -webkit-appearance: none;
}

button.secondary {
  background: var(--color-surface);
  color: var(--color-brand);
  border: 2px solid var(--color-brand);
}

button.danger { background: var(--color-danger); }
button:disabled { background: #bbb; color: #eee; }

input[type="text"], input[type="password"], input[type="number"], input[type="date"], select {
  min-height: var(--touch-size);
  border: 2px solid var(--color-border);
  border-radius: 10px;
  padding: 0 12px;
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text);
  -webkit-appearance: none;
}

.hidden { display: none !important; }

#connection-banner {
  text-align: center;
  padding: 8px;
  font-weight: 600;
  color: #fff;
  background: var(--color-warning);
}

#view-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

#login-form {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 32px 24px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

#login-form h1 { text-align: center; color: var(--color-brand); margin-top: 0; }
#login-form label { display: block; margin: 12px 0 4px; font-weight: 600; }
#login-error { color: var(--color-danger); margin-top: 10px; min-height: 20px; font-weight: 600; }

#app-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 16px;
  background: var(--color-brand);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}

#app-header .brand { font-size: 20px; font-weight: 700; margin-right: 12px; }

#main-nav { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
#main-nav button {
  min-height: 44px;
  background: rgba(255,255,255,0.15);
  font-size: 14px;
  padding: 0 12px;
}
#main-nav button.active { background: #fff; color: var(--color-brand); }

#user-info { font-size: 14px; margin-right: 8px; }
#logout-btn { background: rgba(0,0,0,0.25); min-height: 44px; }

.screen { padding: 12px; }

.ventas-layout {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
@media (min-width: 820px) {
  .ventas-layout { flex-direction: row; align-items: flex-start; }
  .catalog-pane { flex: 1.4; }
  .cart-pane { flex: 1; position: sticky; top: 76px; }
}

.catalog-pane, .cart-pane {
  background: var(--color-surface);
  border-radius: 14px;
  padding: 12px;
}

#category-tabs { display: flex; gap: 8px; overflow-x: auto; margin: 10px 0; padding-bottom: 4px; }
#category-tabs button { min-height: 44px; white-space: nowrap; background: var(--color-bg); color: var(--color-text); }
#category-tabs button.active { background: var(--color-brand); color: #fff; }

#product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.product-card {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: 12px 10px;
  text-align: left;
  min-height: 84px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-text);
}
.product-card .p-name { font-weight: 700; font-size: 15px; }
.product-card .p-price { color: var(--color-brand); font-weight: 700; margin-top: 6px; }

#cart-items { max-height: 40vh; overflow-y: auto; margin: 10px 0; }
.cart-line { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--color-border); }
.cart-line .cl-name { flex: 1; font-weight: 600; }
.cart-line .cl-qty-btn { min-height: 36px; min-width: 36px; padding: 0; font-size: 18px; }
.cart-line .cl-qty { width: 40px; text-align: center; font-weight: 700; }
.cart-line .cl-total { width: 70px; text-align: right; font-weight: 700; }

.cart-totals { font-size: 15px; }
.cart-totals > div { display: flex; justify-content: space-between; align-items: center; padding: 4px 0; }
.cart-totals .total-row { font-size: 20px; font-weight: 800; color: var(--color-brand); }

#payment-method-selector { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 10px 0; }
#payment-method-selector label {
  display: flex; align-items: center; gap: 6px;
  background: var(--color-bg); border: 2px solid var(--color-border);
  border-radius: 10px; padding: 8px 10px; font-size: 13px;
}
#payment-method-selector label.active { border-color: var(--color-brand); background: #fdece3; }

#cash-fields { display: flex; gap: 10px; margin: 10px 0; }
#cash-fields > div { flex: 1; }
#cash-fields label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }

#charge-btn { width: 100%; font-size: 18px; min-height: 64px; }

.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: flex-end; justify-content: center;
  z-index: 50;
}
.modal-content {
  background: var(--color-surface); border-radius: 16px 16px 0 0;
  padding: 20px; width: 100%; max-width: 480px; max-height: 85vh; overflow-y: auto;
}
@media (min-width: 600px) {
  .modal { align-items: center; }
  .modal-content { border-radius: 16px; }
}

table { width: 100%; border-collapse: collapse; background: var(--color-surface); border-radius: 12px; overflow: hidden; }
table th, table td { text-align: left; padding: 10px; border-bottom: 1px solid var(--color-border); font-size: 14px; }
table th { background: var(--color-bg); }

.badge { display: inline-block; padding: 3px 8px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge-synced { background: #e3f3e3; color: var(--color-success); }
.badge-pending { background: #fff3cd; color: var(--color-warning); }
.badge-failed { background: #fde3e1; color: var(--color-danger); }
.badge-uncertain { background: #fde3e1; color: var(--color-danger); }
.badge-test { background: #fde3e1; color: var(--color-danger); }

.section-title { font-size: 18px; font-weight: 700; margin: 16px 0 10px; }
.field-row { display: flex; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.field-row > div { flex: 1; min-width: 160px; }
.field-row label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }

.list-item { background: var(--color-surface); border-radius: 10px; padding: 12px; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center; gap: 10px; }

#ticket-content { font-family: "Courier New", monospace; font-size: 13px; white-space: pre-wrap; background: #fff; padding: 10px; }

@media print {
  body * { visibility: hidden; }
  #ticket-modal, #ticket-modal * { visibility: visible; }
  #ticket-modal { position: absolute; top: 0; left: 0; background: #fff; }
  #ticket-print-btn, #ticket-close-btn { display: none; }
}