:root {
  color-scheme: light;
  --red: #b4232d;
  --red-dark: #8f1922;
  --red-soft: #fae9ea;
  --ink: #202124;
  --muted: #62666c;
  --line: #dedfe2;
  --surface: #ffffff;
  --background: #f4f5f6;
  --green: #13795b;
  --green-soft: #e6f5ef;
  --amber: #9a5b00;
  --amber-soft: #fff2d8;
  --danger: #b4232d;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--background); }

body {
  margin: 0;
  min-width: 320px;
  background: var(--background);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
}

button, input { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible {
  outline: 3px solid rgba(180, 35, 45, .28);
  outline-offset: 2px;
}

.app-shell { min-height: 100dvh; padding-bottom: calc(86px + var(--safe-bottom)); }

.topbar {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  gap: 12px;
  padding: calc(12px + var(--safe-top)) 16px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--red);
  color: #fff;
  border-radius: 8px;
  font-size: 24px;
  font-weight: 900;
}

h1, h2, h3, p { margin: 0; }
h1 { font-size: 19px; line-height: 1.25; font-weight: 800; }
h2 { font-size: 21px; line-height: 1.3; font-weight: 800; }
h3 { font-size: 18px; }
.eyebrow { color: var(--red); font-size: 12px; font-weight: 800; }

main { max-width: 720px; margin: 0 auto; }
.view { padding: 16px; }

.icon-button, .text-button, .nav-button {
  border: 0;
  background: transparent;
  color: inherit;
}

.icon-button {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 8px;
}
.icon-button:active, .text-button:active, .nav-button:active { background: #eceef0; }
.icon-button svg, button svg { width: 22px; height: 22px; stroke-width: 2; }

.date-row {
  display: grid;
  grid-template-columns: auto minmax(140px, 1fr);
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 12px;
}
.date-row label { font-weight: 800; }
.date-row input {
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  padding: 0 12px;
  color: var(--ink);
  min-width: 0;
}
.save-state {
  grid-column: 2;
  color: var(--muted);
  font-size: 13px;
}

.voice-panel {
  background: #2f3439;
  color: #fff;
  padding: 16px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  margin-bottom: 22px;
}
.voice-panel h2 { font-size: 18px; }
.voice-panel p { color: #d9dde1; font-size: 13px; margin-top: 3px; }
.voice-button {
  min-height: 52px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: #24272a;
  font-weight: 800;
}
.voice-button.listening { background: var(--red); color: #fff; }
.voice-result {
  grid-column: 1 / -1;
  padding-top: 10px;
  border-top: 1px solid #545a60;
  color: #fff;
  font-size: 14px;
}
.voice-fallback { grid-column: 1 / -1; }
.voice-fallback label { display: block; font-size: 12px; font-weight: 800; color: #d9dde1; margin-bottom: 5px; }
.voice-fallback > div { display: grid; grid-template-columns: minmax(0, 1fr) 48px; gap: 6px; }
.voice-fallback input { min-width: 0; height: 48px; border: 1px solid #71777d; border-radius: 6px; background: #fff; color: #202124; padding: 0 12px; }
.voice-fallback button { width: 48px; height: 48px; border: 0; border-radius: 6px; background: var(--green); color: #fff; display: grid; place-items: center; }

.section-heading, .page-heading, .summary-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.page-heading { display: block; margin-bottom: 16px; }
.text-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  border-radius: 6px;
  color: var(--muted);
  font-weight: 700;
}

.inventory-list { display: grid; gap: 10px; }
.inventory-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 5px solid var(--red);
  border-radius: 8px;
  padding: 14px;
}
.item-header { display: flex; justify-content: space-between; gap: 12px; align-items: start; margin-bottom: 12px; }
.item-total { color: var(--muted); font-size: 13px; text-align: right; }
.stock-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stock-field label { display: block; font-size: 13px; font-weight: 800; margin-bottom: 5px; }
.number-control { display: grid; grid-template-columns: 48px minmax(0, 1fr) 48px; gap: 4px; }
.number-control button {
  min-width: 48px;
  min-height: 48px;
  border: 1px solid var(--line);
  background: #f2f3f4;
  border-radius: 6px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}
.number-control input {
  width: 100%;
  min-width: 0;
  height: 48px;
  border: 1px solid #b7bbc0;
  border-radius: 6px;
  text-align: center;
  font-size: 16px;
  font-weight: 800;
  /* Keep inventory numbers readable on desktop even when the OS/browser uses dark mode. */
  color: #202124 !important;
  -webkit-text-fill-color: #202124;
  background: #fff !important;
  opacity: 1;
  appearance: textfield;
}
.number-control input::-webkit-inner-spin-button,
.number-control input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.calc-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
  padding-top: 10px;
}
.calc-cell span { display: block; color: var(--muted); font-size: 12px; }
.calc-cell strong { display: block; margin-top: 2px; font-size: 16px; }
.pending { color: var(--amber); }

.summary-panel {
  margin-top: 22px;
  background: var(--surface);
  border-top: 4px solid var(--green);
  padding: 16px;
}
.summary-count {
  background: var(--green-soft);
  color: var(--green);
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}
.order-summary { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.order-row { display: grid; grid-template-columns: minmax(80px, 1fr) 1.4fr; gap: 8px; background: #fff; padding: 11px 12px; }
.order-row span:last-child { text-align: right; font-weight: 800; }
.empty-state { padding: 30px 16px; text-align: center; color: var(--muted); background: var(--surface); border: 1px dashed #b8bbc0; border-radius: 8px; }
.empty-state svg { width: 32px; height: 32px; margin-bottom: 8px; }

.summary-actions { display: grid; grid-template-columns: 1fr 1.35fr; gap: 8px; margin-top: 14px; }
.primary-button, .secondary-button, .danger-button {
  min-height: 52px;
  border-radius: 6px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 800;
}
.primary-button { border: 1px solid var(--red); background: var(--red); color: #fff; }
.primary-button:active { background: var(--red-dark); }
.secondary-button { border: 1px solid #aeb2b6; background: #fff; color: var(--ink); }
.secondary-button:active { background: #eceef0; }
.danger-button { border: 1px solid var(--danger); background: var(--danger); color: #fff; }
.full-width { width: 100%; margin-top: 16px; }

.history-list { display: grid; gap: 10px; }
.history-card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px; }
.history-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.history-date { font-size: 18px; font-weight: 900; }
.history-meta { color: var(--muted); font-size: 13px; }
.history-actions { display: flex; gap: 8px; margin-top: 12px; }
.history-actions button { flex: 1; }

.settings-note {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  padding: 12px;
  background: var(--amber-soft);
  color: #5d3900;
  border-radius: 6px;
  margin-bottom: 14px;
}
.settings-note svg { width: 22px; height: 22px; margin-top: 1px; }
.settings-list { display: grid; gap: 10px; }
.settings-card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px; }
.settings-card h3 { margin-bottom: 10px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.settings-field label { display: block; font-size: 12px; color: var(--muted); font-weight: 700; margin-bottom: 4px; }
.settings-field input { width: 100%; height: 46px; border: 1px solid #b7bbc0; border-radius: 6px; padding: 0 10px; }

.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + var(--safe-bottom)) max(8px, env(safe-area-inset-right));
}
.nav-button {
  min-height: 58px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}
.nav-button.active { color: var(--red); background: var(--red-soft); }
.nav-button svg { width: 23px; height: 23px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(92px + var(--safe-bottom));
  transform: translate(-50%, 16px);
  width: min(calc(100% - 32px), 420px);
  background: #24272a;
  color: #fff;
  padding: 12px 16px;
  border-radius: 6px;
  text-align: center;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 60;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

dialog { border: 0; border-radius: 8px; width: min(calc(100% - 32px), 380px); padding: 0; }
dialog::backdrop { background: rgba(17, 19, 21, .58); }
dialog form { padding: 24px; text-align: center; }
.dialog-icon { width: 48px; height: 48px; margin: 0 auto 12px; display: grid; place-items: center; border-radius: 50%; color: var(--danger); background: var(--red-soft); }
dialog p { color: var(--muted); margin-top: 8px; }
.dialog-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 20px; }

@media (min-width: 720px) {
  .topbar { padding-left: max(24px, calc((100vw - 720px) / 2)); padding-right: max(24px, calc((100vw - 720px) / 2)); }
  .view { padding: 24px; }
  .inventory-list, .settings-list { grid-template-columns: 1fr 1fr; }
  .number-control { grid-template-columns: 36px minmax(48px, 1fr) 36px; }
  .number-control button { min-width: 36px; }
  .summary-panel { border: 1px solid var(--line); border-top: 4px solid var(--green); border-radius: 8px; }
}

@media (max-width: 390px) {
  .topbar { grid-template-columns: 44px minmax(0, 1fr) 44px; gap: 9px; padding-left: 12px; padding-right: 12px; }
  .brand-mark { width: 44px; height: 44px; }
  h1 { font-size: 17px; }
  .view { padding: 12px; }
  .voice-panel { grid-template-columns: 1fr; }
  .voice-button { width: 100%; justify-content: center; }
  .stock-grid, .calc-row, .settings-grid { gap: 8px; }
  .number-control { grid-template-columns: 44px minmax(0, 1fr) 44px; }
  .number-control button { min-width: 44px; }
  .summary-actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --ink: #f4f5f6;
    --muted: #c8cbd0;
    --line: #4b5056;
    --surface: #24282d;
    --background: #171a1e;
    --red-soft: #4b2228;
    --green-soft: #173e32;
    --amber-soft: #4a3515;
  }
  .number-control input, .settings-field input, .date-row input, .order-row, .secondary-button { background: #24282d; color: var(--ink); }
  .number-control button { background: #343940; color: var(--ink); }
  .voice-button { background: #fff; color: #222; }
  .empty-state { background: var(--surface); }
}