:root, html[data-theme='light'] {
  color-scheme: light;
  --bg: #f4f2ec;
  --surface: #ffffff;
  --border: #ddd6c8;
  --text: #1f2421;
  --muted: #6b7280;
  --primary: #1b6b4a;
  --primary-hover: #145a3e;
  --primary-soft: rgba(27, 107, 74, 0.12);
  --error: #dc2626;
  --radius: 12px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #121614;
  --surface: #1a1f1c;
  --border: #2f3832;
  --text: #eef2ef;
  --muted: #9ca89f;
  --primary: #3d9970;
  --primary-hover: #52b388;
  --primary-soft: rgba(61, 153, 112, 0.18);
  --error: #ff8a84;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  overscroll-behavior: none;
}

.hidden { display: none !important; }

.caixa-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.caixa-pair-card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 8px 32px rgba(31, 36, 33, 0.08);
}

.caixa-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  display: block;
  margin: 0 auto 0.75rem;
  background: #fff;
  border-radius: 10px;
  padding: 4px;
}

.caixa-pair-card h1 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  text-align: center;
  color: var(--primary);
}

.hint { color: var(--muted); font-size: 0.9rem; line-height: 1.45; }

.caixa-form label,
.caixa-form-label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.75rem 0 0.35rem;
}

.caixa-form input,
.caixa-input,
.caixa-search {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: var(--surface);
  color: var(--text);
}

.caixa-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}
.caixa-divider::before,
.caixa-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.caixa-link-admin {
  display: block;
  text-align: center;
  margin-top: 1.25rem;
  color: var(--primary);
  font-size: 0.9rem;
}

.error-msg {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }
.btn-lg { padding: 0.9rem 1rem; font-size: 1.05rem; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-secondary { background: var(--primary-soft); color: var(--primary); border-color: var(--primary); }
.btn-ghost { color: var(--muted); border-color: var(--border); background: #fff; }
.btn-sm { padding: 0.45rem 0.65rem; font-size: 0.85rem; }

/* App shell */
.caixa-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(4.5rem + var(--safe-bottom));
}

.caixa-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}

.caixa-header-left { display: flex; align-items: center; gap: 0.65rem; min-width: 0; }
.caixa-header-logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: #fff;
  padding: 3px;
  object-fit: contain;
  flex-shrink: 0;
}
.caixa-header strong { display: block; font-size: 1rem; }
.caixa-sub { font-size: 0.8rem; opacity: 0.9; }
.caixa-header-actions { display: flex; gap: 0.35rem; flex-shrink: 0; }
.caixa-header .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.35); background: rgba(255,255,255,0.1); }

.caixa-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 56px;
  z-index: 9;
}

.caixa-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}
.caixa-badge--ok { background: var(--primary-soft); color: var(--primary); }

.caixa-main { flex: 1; padding: 0.75rem 1rem 1rem; }

.caixa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.65rem;
}

.caixa-produto {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 0.75rem;
  text-align: left;
  cursor: pointer;
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.1s, box-shadow 0.1s;
}
.caixa-produto:active { transform: scale(0.98); }
.caixa-produto:disabled { opacity: 0.45; cursor: not-allowed; }
.caixa-produto-nome {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 0.35rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.caixa-produto-preco { font-size: 1rem; font-weight: 700; color: var(--primary); margin: 0; }
.caixa-produto-estoque { font-size: 0.75rem; color: var(--muted); margin: 0.25rem 0 0; }
.caixa-produto-estoque--baixo { color: #b45309; }

.caixa-cart-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.65rem 1rem calc(0.65rem + var(--safe-bottom));
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
  z-index: 20;
}

.caixa-cart-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.caixa-cart-btn strong { margin-left: auto; font-size: 1.1rem; }

.caixa-cart-count {
  min-width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

/* Sheets */
.caixa-sheet {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.caixa-sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
}
.caixa-sheet-panel {
  position: relative;
  width: min(480px, 100%);
  max-height: 85vh;
  background: var(--surface);
  border-radius: var(--radius) var(--radius) 0 0;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.2s ease;
}
.caixa-sheet-panel--center {
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem calc(1.5rem + var(--safe-bottom));
  border-radius: var(--radius);
  margin: auto 1rem;
  max-height: none;
}
@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.caixa-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
.caixa-sheet-head h2 { margin: 0; font-size: 1.15rem; }

.caixa-carrinho-lista {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 1rem;
}

.caixa-carrinho-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.caixa-carrinho-item:last-child { border-bottom: none; }
.caixa-carrinho-nome { font-weight: 600; margin: 0; grid-column: 1; }
.caixa-carrinho-preco { color: var(--muted); font-size: 0.85rem; margin: 0; grid-column: 1; }
.caixa-carrinho-sub { font-weight: 700; color: var(--primary); grid-column: 2; grid-row: 1 / 3; align-self: center; }

.caixa-qty {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  grid-column: 1 / -1;
}
.caixa-qty button {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 1.1rem;
  cursor: pointer;
}
.caixa-qty span { min-width: 1.5rem; text-align: center; font-weight: 600; }

.caixa-sheet-foot {
  padding: 1rem;
  border-top: 1px solid var(--border);
  padding-bottom: calc(1rem + var(--safe-bottom));
}
.caixa-sheet-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}
.caixa-sheet-total strong { font-size: 1.35rem; color: var(--primary); }

.caixa-pagamento-total { padding: 0 1rem; font-size: 1.05rem; }
.caixa-pagamento-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  padding: 1rem;
}
.caixa-pay-btn {
  padding: 1.1rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}
.caixa-pay-btn:hover { border-color: var(--primary); background: var(--primary-soft); }
.caixa-pay-btn:disabled { opacity: 0.6; cursor: wait; }

.caixa-input { margin: 0.35rem 1rem 0.75rem; width: calc(100% - 2rem); }
.caixa-textarea { resize: vertical; min-height: 3.5rem; font: inherit; }
.caixa-fechamento-body { padding: 0 0 1rem; overflow-y: auto; max-height: 70vh; }
.caixa-fechamento-body .caixa-form-label { margin-top: 0.5rem; }

.caixa-sucesso-icon {
  width: 4rem;
  height: 4rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.caixa-empty {
  text-align: center;
  color: var(--muted);
  padding: 2rem 1rem;
  grid-column: 1 / -1;
}

.app-toast {
  position: fixed;
  left: 50%;
  bottom: calc(5rem + var(--safe-bottom));
  transform: translateX(-50%) translateY(120%);
  background: #1f2421;
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  z-index: 100;
  transition: transform 0.2s;
  max-width: min(90vw, 360px);
  text-align: center;
}
.app-toast.visible { transform: translateX(-50%) translateY(0); }
.app-toast[data-type='error'] { background: #991b1b; }
.app-toast[data-type='success'] { background: var(--primary); }

@media (min-width: 768px) {
  .caixa-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}