:root {
  --bg: #f3f6f4;
  --panel: #ffffff;
  --panel-soft: #f7faf8;
  --line: #dce5e0;
  --line-strong: #b9c9c0;
  --text: #14231c;
  --muted: #64756c;
  --muted-light: #8b9a92;
  --accent: #14845f;
  --accent-hover: #0e6c4c;
  --accent-soft: #e5f5ed;
  --accent-ink: #ffffff;
  --danger: #b7463d;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  color-scheme: light;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(20, 132, 95, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 132, 95, .035) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  font-size: 16px;
}

button, textarea, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
button:focus-visible, a:focus-visible, textarea:focus-visible, input:focus-visible {
  outline: 3px solid rgba(20, 132, 95, .2);
  outline-offset: 2px;
}

.app-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; gap: 14px; align-items: center; color: inherit; text-decoration: none; }
.brand > span:last-child { display: grid; gap: 1px; }
.brand strong { letter-spacing: .16em; font-size: .95rem; }
.brand small { color: var(--muted); font-size: .75rem; letter-spacing: .3em; }
.brand-mark { width: 38px; height: 38px; display: grid; grid-template-columns: 1fr 1fr; gap: 3px; padding: 7px; border: 1px solid var(--accent); background: #fff; }
.brand-mark i { background: var(--accent); display: block; }
.brand-mark i:last-child { width: 45%; justify-self: end; }

.topbar-actions { display: flex; align-items: center; gap: 20px; }
.local-status { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: .82rem; }
.local-status > span:first-child { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.language-button {
  border: 1px solid var(--line-strong);
  background: #fff;
  min-width: 46px;
  height: 36px;
  cursor: pointer;
}
.language-button:hover { border-color: var(--accent); color: var(--accent); }

main { padding: 42px 0 34px; }
.mode-tabs { display: flex; gap: 0; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.mode-tab {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 14px 24px 17px 0;
  margin-right: 32px;
  cursor: pointer;
}
.mode-tab::after { content: ""; position: absolute; left: 0; right: 24px; bottom: -1px; height: 2px; background: transparent; }
.mode-tab:hover { color: var(--text); }
.mode-tab.is-active { color: var(--text); font-weight: 600; }
.mode-tab.is-active::after { background: var(--accent); }
.tab-index { font: 700 .72rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; color: var(--accent); }

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, .85fr) minmax(420px, 1.15fr);
  border: 1px solid var(--line);
  min-height: 610px;
  background: var(--panel);
  box-shadow: 0 18px 55px rgba(30, 70, 50, .08);
}
.workspace[hidden] { display: none; }
.control-panel, .preview-panel, .reader-input-panel, .reader-result-panel { padding: 32px; }
.control-panel, .reader-input-panel { border-right: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 20px; }
.section-heading span, .eyebrow {
  color: var(--accent);
  font: 700 .72rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: .12em;
}
h1 { margin: 0; font-size: 1rem; font-weight: 650; }

.format-grid { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); margin-bottom: 30px; }
.format-card {
  min-width: 0;
  min-height: 82px;
  padding: 12px 6px;
  border: 0;
  border-right: 1px solid var(--line);
  background: var(--panel-soft);
  cursor: pointer;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
}
.format-card:last-child { border-right: 0; }
.format-card:hover { background: #eef5f1; }
.format-card strong { font: 750 .92rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.format-card span { color: var(--muted); font-size: .68rem; white-space: nowrap; }
.format-card.is-selected { background: var(--accent); color: var(--accent-ink); }
.format-card.is-selected span { color: rgba(255, 255, 255, .76); }

.field-label, .inline-fields span { display: block; color: var(--muted); font-size: .82rem; margin-bottom: 9px; }
textarea {
  width: 100%;
  resize: vertical;
  min-height: 132px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  padding: 15px;
  outline: none;
  line-height: 1.6;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20, 132, 95, .09); }
.field-hint { min-height: 18px; margin: 7px 0 0; color: var(--muted-light); font-size: .75rem; }
.field-hint.is-error { color: var(--danger); }
.size-control { margin-top: 16px; }
.size-control-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.size-control-header .field-label { margin-bottom: 9px; }
.ratio-readout { color: var(--muted-light); font: .7rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.ratio-readout strong { color: var(--accent); }
.size-presets { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); }
.size-presets button {
  min-width: 0;
  min-height: 42px;
  padding: 7px 4px;
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 3px;
  border: 0;
  border-right: 1px solid var(--line);
  background: var(--panel-soft);
  cursor: pointer;
}
.size-presets button:last-child { border-right: 0; }
.size-presets button:hover { background: #eef5f1; }
.size-presets button strong { font: 700 .78rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.size-presets button small { color: var(--muted-light); font-size: .65rem; }
.size-presets button.is-selected { background: var(--accent); color: var(--accent-ink); }
.size-presets button.is-selected small { color: rgba(255,255,255,.72); }
.size-detail {
  min-height: 48px;
  margin-top: 8px;
  padding: 7px 10px 7px 14px;
  display: grid;
  grid-template-columns: auto 86px auto minmax(116px, 1fr);
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
}
.size-detail label { color: var(--muted); font-size: .78rem; }
.size-detail input {
  width: 86px;
  height: 34px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  padding: 0 8px;
  outline: none;
}
.size-detail input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20, 132, 95, .09); }
.size-unit { color: var(--muted-light); font: .7rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.size-detail output { justify-self: end; color: var(--accent); font: 700 .72rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.inline-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0 16px; }
.inline-fields label {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 50px;
  padding: 8px 10px 8px 14px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
}
.inline-fields label span { margin: 0; }
input[type="color"] { width: 32px; height: 32px; padding: 0; border: 0; background: none; cursor: pointer; }
.check-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 13px 14px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  cursor: pointer;
}
.check-row > span { display: grid; gap: 3px; }
.check-row strong { font-size: .82rem; font-weight: 600; }
.check-row small { color: var(--muted); font-size: .72rem; }
.check-row input { width: 18px; height: 18px; accent-color: var(--accent); }
.check-row.is-hidden { visibility: hidden; }

.primary-button, .secondary-button {
  min-height: 48px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  font-weight: 700;
}
.primary-button { width: 100%; background: var(--accent); color: var(--accent-ink); }
.primary-button:hover { background: var(--accent-hover); }
.primary-button.compact { width: auto; min-height: 42px; }
.secondary-button { min-height: 42px; border: 1px solid var(--line-strong); background: #fff; color: var(--text); }
.secondary-button:hover { border-color: var(--accent); color: var(--accent); }
.shortcut { margin: 10px 0 0; text-align: right; color: var(--muted-light); font: .7rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }

.preview-panel, .reader-result-panel { display: flex; flex-direction: column; background: var(--panel-soft); }
.preview-toolbar, .preview-meta, .preview-actions, .result-actions { display: flex; justify-content: space-between; align-items: center; }
.preview-toolbar > div { display: grid; gap: 8px; }
.format-pill {
  border: 1px solid var(--line-strong);
  background: #fff;
  padding: 7px 10px;
  color: var(--muted);
  font: .7rem/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}
.preview-stage {
  flex: 1;
  min-height: 340px;
  display: grid;
  place-items: center;
  margin: 24px 0 18px;
  padding: 28px;
  border: 1px solid var(--line);
  background:
    linear-gradient(45deg, #f3f5f4 25%, transparent 25%, transparent 75%, #f3f5f4 75%),
    linear-gradient(45deg, #f3f5f4 25%, #fff 25%, #fff 75%, #f3f5f4 75%);
  background-position: 0 0, 9px 9px;
  background-size: 18px 18px;
  overflow: auto;
}
#barcode-canvas { display: block; max-width: 100%; height: auto; box-shadow: 0 16px 40px rgba(32, 58, 45, .13); image-rendering: crisp-edges; }
.preview-empty, .reader-empty { color: var(--muted); text-align: center; }
.preview-empty > span { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line-strong); border-radius: 50%; margin: 0 auto 12px; }
.preview-meta { justify-content: flex-start; gap: 44px; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.preview-meta > span { display: grid; gap: 5px; }
.preview-meta small { color: var(--muted); font-size: .7rem; }
.preview-meta strong { font: 700 .74rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.preview-actions { gap: 10px; padding-top: 16px; justify-content: flex-end; }

.reader-workspace { grid-template-columns: minmax(340px, .9fr) minmax(420px, 1.1fr); }
.reader-input-panel { background: #fff; }
.drop-zone {
  width: 100%;
  min-height: 340px;
  padding: 34px;
  border: 1px dashed var(--line-strong);
  background: var(--panel-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  text-align: center;
}
.drop-zone:hover, .drop-zone.is-dragging { border-color: var(--accent); background: var(--accent-soft); }
.drop-icon { display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 8px; border: 1px solid var(--accent); color: var(--accent); font-size: 1.5rem; }
.drop-zone strong { font-size: 1rem; }
.drop-zone > span:not(.drop-icon) { color: var(--muted); font-size: .82rem; }
.drop-zone small { margin-top: 10px; color: var(--muted-light); font: .7rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.privacy-note { display: flex; gap: 12px; align-items: flex-start; margin-top: 20px; padding: 14px; color: var(--accent); background: var(--accent-soft); }
.privacy-note p { display: grid; gap: 4px; margin: 0; }
.privacy-note strong { color: var(--text); font-size: .82rem; }
.privacy-note small { color: var(--muted); font-size: .75rem; }
.image-preview {
  position: relative;
  flex: 1;
  min-height: 330px;
  display: grid;
  place-items: center;
  margin: 24px 0 16px;
  padding: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
#uploaded-preview { max-width: 100%; max-height: 330px; object-fit: contain; }
.scan-frame { display: block; width: 76px; height: 76px; margin: 0 auto 14px; border: 1px solid var(--line-strong); background: linear-gradient(90deg, var(--accent) 2px, transparent 2px) 0 0 / 16px 100%, linear-gradient(var(--accent) 2px, transparent 2px) 0 0 / 100% 16px; opacity: .6; }
.scan-overlay { position: absolute; inset: 0; background: rgba(255,255,255,.62); overflow: hidden; }
.scan-overlay span { position: absolute; left: 12%; right: 12%; top: 10%; height: 2px; background: var(--accent); box-shadow: 0 0 18px rgba(20,132,95,.55); animation: scan 1.25s ease-in-out infinite alternate; }
@keyframes scan { to { top: 90%; } }
.result-box { padding-top: 16px; border-top: 1px solid var(--line); }
.result-box label { display: block; margin-bottom: 9px; color: var(--muted); font-size: .75rem; }
.result-value { min-height: 66px; max-height: 132px; overflow: auto; padding: 13px 14px; border: 1px solid var(--line); background: #fff; line-height: 1.55; word-break: break-all; white-space: pre-wrap; }
.result-actions { justify-content: flex-end; gap: 10px; margin-top: 12px; }
.read-error { padding: 15px; display: grid; gap: 4px; border-left: 3px solid var(--danger); background: #fff2f1; }
.read-error[hidden] { display: none; }
.read-error strong { color: var(--danger); font-size: .84rem; }
.read-error span { color: var(--muted); font-size: .76rem; }

#scanner-engine { position: fixed; left: -200vw; top: 0; width: 420px; height: 420px; pointer-events: none; }
.toast {
  position: fixed;
  z-index: 100;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 18px);
  padding: 11px 16px;
  border: 1px solid #0d6849;
  background: #103c2d;
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
  box-shadow: 0 12px 30px rgba(20, 35, 28, .2);
  font-size: .84rem;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

footer {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted-light);
  font: .72rem/1.4 ui-monospace, SFMono-Regular, Consolas, monospace;
}

@media (max-width: 900px) {
  .format-grid { grid-template-columns: repeat(3, 1fr); }
  .format-card:nth-child(3) { border-right: 0; }
  .format-card:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 820px) {
  .app-shell { width: min(100% - 24px, 680px); }
  .workspace, .reader-workspace { grid-template-columns: 1fr; }
  .control-panel, .reader-input-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .preview-stage { min-height: 340px; }
}

@media (max-width: 520px) {
  .topbar { min-height: 72px; }
  .local-status { display: none; }
  main { padding-top: 26px; }
  .mode-tab { margin-right: 12px; padding-right: 12px; }
  .control-panel, .preview-panel, .reader-input-panel, .reader-result-panel { padding: 20px; }
  .format-grid { grid-template-columns: 1fr 1fr; }
  .format-card { border-bottom: 1px solid var(--line); }
  .format-card:nth-child(odd) { border-right: 1px solid var(--line); }
  .format-card:nth-child(even) { border-right: 0; }
  .format-card:last-child { border-bottom: 0; }
  .preview-stage { min-height: 290px; padding: 18px; }
  .preview-meta { gap: 24px; }
  .preview-actions, .result-actions { align-items: stretch; }
  .preview-actions button, .result-actions button, .result-actions a { flex: 1; justify-content: center; }
  footer { gap: 20px; }
  footer span:last-child { text-align: right; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* Unified read / generate workspace */
.page-titlebar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 20px;
}
.page-titlebar > div { display: grid; gap: 8px; }
.page-titlebar h1 { font-size: 1.35rem; letter-spacing: -.02em; }
.page-titlebar p { margin: 0; color: var(--muted); font-size: .82rem; }
.dual-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
}
.tool-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 16px 46px rgba(30, 70, 50, .07);
}
.tool-card-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 13px;
  align-items: center;
  padding-bottom: 19px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.tool-number {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 750 .72rem/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}
.tool-card-header h2 { margin: 0 0 3px; font-size: 1rem; }
.tool-card-header p { margin: 0; color: var(--muted); font-size: .74rem; }
.reader-card, .generator-card { display: flex; flex-direction: column; }
.compact-drop { min-height: 206px; padding: 24px; }
.compact-preview { min-height: 200px; max-height: 260px; margin: 14px 0; }
.compact-preview #uploaded-preview { max-height: 218px; }
.reader-card .privacy-note { margin-top: auto; }
.generator-card .format-grid { grid-template-columns: repeat(5, 1fr); margin-bottom: 20px; }
.generator-card .format-card { min-height: 67px; }
.generator-card textarea { min-height: 96px; }
.generator-options {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 12px;
  align-items: stretch;
  margin: 16px 0;
}
.generator-options .inline-fields { margin: 0; gap: 8px; }
.generator-options .check-row { margin: 0; min-height: 50px; }
.check-row.is-hidden { display: none; }
.compact-code-stage {
  flex: none;
  min-height: 232px;
  max-height: 270px;
  margin: 16px 0 12px;
  padding: 18px;
}
.compact-code-stage #barcode-canvas { max-height: 228px; width: auto; }
.generator-card .preview-meta { margin-top: auto; }

@media (max-width: 980px) {
  .dual-workspace { grid-template-columns: 1fr; }
  .tool-card { padding: 26px; }
  .generator-card .format-grid { grid-template-columns: repeat(5, 1fr); }
  .generator-card .format-card { border-bottom: 0; border-right: 1px solid var(--line); }
  .generator-card .format-card:last-child { border-right: 0; }
  .compact-drop { min-height: 220px; }
}

@media (max-width: 580px) {
  .page-titlebar { align-items: start; flex-direction: column; gap: 8px; }
  .page-titlebar p { max-width: 28ch; }
  .tool-card { padding: 19px; }
  .tool-card-header { grid-template-columns: auto 1fr; }
  .tool-card-header .format-pill { grid-column: 1 / -1; justify-self: start; }
  .generator-card .format-grid { grid-template-columns: repeat(2, 1fr); }
  .generator-card .format-card { border-bottom: 1px solid var(--line); }
  .generator-card .format-card:nth-child(odd) { border-right: 1px solid var(--line); }
  .generator-card .format-card:nth-child(even) { border-right: 0; }
  .generator-card .format-card:last-child { border-bottom: 0; }
  .generator-options { grid-template-columns: 1fr; }
  .size-detail { grid-template-columns: auto 82px minmax(0, 1fr); padding-left: 10px; }
  .size-detail input { width: 82px; }
  .size-detail output { grid-column: 1 / -1; justify-self: start; font-size: .68rem; }
  .compact-code-stage { min-height: 260px; max-height: 300px; }
}