* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg: #0f0f13;
  --card: #1a1a22;
  --card2: #222230;
  --accent: #6c63ff;
  --text: #f0f0f5;
  --text2: #9090aa;
  --border: #2e2e40;
  --success: #4caf50;
  --danger: #f44336;
  --radius: 14px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --header-h: 64px;
  --tabs-h: 44px;
  --toolbar-h: 54px;
  --printbar-h: 60px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  overflow: hidden;
}

/* ── HEADER ─────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: calc(var(--header-h) + var(--safe-top));
  padding: calc(var(--safe-top) + 10px) 16px 10px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
}

.header-left { display: flex; align-items: center; gap: 10px; }
.printer-icon { font-size: 26px; }
.app-title { font-size: 19px; font-weight: 700; }
.status-text { font-size: 11px; color: var(--text2); margin-top: 1px; }
.status-text.connected { color: var(--success); }

.connect-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.connect-btn:active { opacity: .75; }
.connect-btn.connected { background: var(--danger); }

/* ── TABS ────────────────────────────────────────────────── */
.tabs {
  display: flex;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: calc(var(--header-h) + var(--safe-top));
  left: 0; right: 0;
  z-index: 199;
  height: var(--tabs-h);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 1 0 auto;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text2);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  padding: 0 12px;
  transition: color .15s, border-color .15s;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── PAGE OFFSET ─────────────────────────────────────────── */
.tab-content {
  display: none;
  position: fixed;
  top: calc(var(--header-h) + var(--tabs-h) + var(--safe-top));
  bottom: 0;
  left: 0; right: 0;
  overflow: hidden;
}
.tab-content.active { display: flex; flex-direction: column; }

/* ── TOOLBAR (print tab) ─────────────────────────────────── */
.toolbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  flex-shrink: 0;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.btn-group { display: flex; gap: 2px; }

.tool-btn {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 7px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background .12s, border-color .12s;
  flex-shrink: 0;
}
.tool-btn svg { fill: var(--text); }
.tool-btn:active { opacity: .7; }
.tool-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.tool-btn.active svg { fill: #fff; }

.separator {
  width: 1px;
  height: 28px;
  background: var(--border);
  margin: 0 3px;
  flex-shrink: 0;
}

/* ── EDITOR + PREVIEW ────────────────────────────────────── */
.editor-area {
  display: flex;
  flex: 1;
  overflow: hidden;
  gap: 0;
}

.editor-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  padding: 10px 10px 0 10px;
  border-right: 1px solid var(--border);
}

.preview-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  padding: 10px 10px 0 10px;
  overflow: hidden;
}

.pane-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .8px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.preview-info {
  font-size: 10px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(108,99,255,.15);
  padding: 1px 6px;
  border-radius: 8px;
  text-transform: none;
  letter-spacing: 0;
}

textarea {
  flex: 1;
  width: 100%;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  padding: 10px;
  resize: none;
  outline: none;
}
textarea:focus { border-color: var(--accent); }

.density-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0 6px;
}
.density-label { font-size: 12px; color: var(--text2); }
.density-row input[type=range] { flex: 1; accent-color: var(--accent); }
.density-val { font-size: 12px; color: var(--text2); min-width: 14px; text-align: right; }

/* ── PAPER PREVIEW ───────────────────────────────────────── */
.paper-wrap {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.paper-wrap:has(.paper-banner) {
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  align-items: stretch;
}

.paper {
  background: #fff;
  color: #111;
  font-family: 'Courier New', Courier, monospace;
  font-size: 13px;
  line-height: 1.45;
  padding: 14px 10px;
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 100%;
  overflow-wrap: break-word;
}

/* size variants on the paper */
.paper.size-small  { font-size: 11px; }
.paper.size-normal { font-size: 13px; }
.paper.size-large  { font-size: 17px; }
.paper.size-xl     { font-size: 22px; }
.paper.size-xxl    { font-size: 30px; }
.paper.size-xxxl   { font-size: 42px; }

/* Banner/rotate mode — horizontal strip, tall text, scrollable sideways */
.paper.paper-banner {
  writing-mode: vertical-lr;
  text-orientation: mixed;
  height: 100%;
  width: max-content;
  max-width: none;
  padding: 8px 14px;
  display: flex;
  align-items: center;
}
.paper-wrap .paper.paper-banner {
  min-height: unset;
}
.banner-text {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.1;
  white-space: nowrap;
}

.paper .line-bold   { font-weight: 700; }
.paper .line-center { text-align: center; display: block; }
.paper .line-right  { text-align: right; display: block; }
.paper .line-left   { text-align: left; display: block; }
.paper .paper-divider { color: #888; display: block; }

/* ── PRINT BAR ───────────────────────────────────────────── */
.print-bar {
  display: flex;
  gap: 10px;
  padding: 10px 12px calc(10px + var(--safe-bottom));
  background: var(--card);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.btn-clear {
  background: var(--card2);
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 14px;
  cursor: pointer;
}
.btn-clear:active { opacity: .7; }

.btn-print {
  flex: 1;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.btn-print:active { opacity: .75; }
.btn-print:disabled { opacity: .4; cursor: not-allowed; }

/* ── SCROLLABLE TABS (image/history/settings) ────────────── */
.tab-content.scrollable { overflow-y: auto; padding: 12px; }

/* ── CARD ────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px;
  border: 1px solid var(--border);
}

/* ── IMAGE TAB ───────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
}
.upload-zone:active { border-color: var(--accent); background: rgba(108,99,255,.05); }
.upload-icon { font-size: 38px; margin-bottom: 8px; }
.upload-text { font-size: 16px; font-weight: 600; margin-bottom: 5px; }
.upload-sub { font-size: 12px; color: var(--text2); line-height: 1.5; }

/* ── BARCODE TAB ─────────────────────────────────────────── */
.barcode-input {
  width: 100%;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  padding: 12px;
  outline: none;
  margin-bottom: 12px;
}
.barcode-input:focus { border-color: var(--accent); }

.barcode-preview-wrap {
  background: #fff;
  border-radius: 8px;
  padding: 10px;
  margin: 12px 0;
  text-align: center;
}
#barcodeCanvas { max-width: 100%; height: auto; }

.barcode-error {
  background: rgba(244,67,54,.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  margin: 12px 0;
}

.mode-btn {
  flex: 1;
  background: var(--card2);
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.mode-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.mode-btn:active { opacity: .75; }

.slider-row { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.slider-row label { color: var(--text2); font-size: 13px; min-width: 70px; }
input[type=range] { flex: 1; accent-color: var(--accent); }

.btn-row { display: flex; gap: 10px; margin-top: 12px; }
.btn-primary {
  flex: 1;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 13px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary:active { opacity: .75; }
.btn-secondary {
  background: var(--card2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px 18px;
  font-size: 15px;
  cursor: pointer;
}
.btn-secondary:active { opacity: .7; }

/* ── HISTORY ─────────────────────────────────────────────── */
.history-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.history-title { font-size: 15px; font-weight: 600; }
.btn-sm-danger {
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
}
.history-item {
  background: var(--card2);
  border-radius: 10px;
  padding: 11px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
}
.history-item-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px; }
.history-type {
  font-size: 11px; font-weight: 600;
  padding: 2px 8px; border-radius: 10px;
  background: rgba(108,99,255,.2); color: var(--accent);
}
.history-date { font-size: 11px; color: var(--text2); }
.history-preview { font-size: 13px; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.empty-state { text-align: center; color: var(--text2); padding: 30px; font-size: 14px; }

/* ── SETTINGS ────────────────────────────────────────────── */
.section-title {
  font-size: 11px; font-weight: 700; color: var(--text2);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px;
}
.setting-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid var(--border);
}
.setting-item:last-child { border-bottom: none; }
.setting-name { font-size: 14px; font-weight: 500; }
.setting-desc { font-size: 12px; color: var(--text2); margin-top: 2px; }
.btn-action {
  background: var(--card2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 7px 14px; font-size: 13px; cursor: pointer; white-space: nowrap;
}
.btn-action:active { opacity: .7; }
.btn-action.btn-danger { border-color: var(--danger); color: var(--danger); }
.version-info { font-size: 12px; color: var(--text2); text-align: center; padding: 6px 0; }

/* ── PDF TAB ─────────────────────────────────────────────── */
.pdf-screen { display: none; flex-direction: column; height: 100%; }
.pdf-screen.active { display: flex; }

#tab-pdf { padding: 12px; gap: 0; overflow: hidden; }
#tab-pdf .upload-zone { margin-top: 40px; }

.pdf-toolbar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 8px 10px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pdf-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pdf-page-info {
  font-size: 13px;
  color: var(--text2);
  flex: 1;
  text-align: center;
}

.pdf-hint {
  font-size: 11px;
  color: var(--accent);
  text-align: center;
}

.pdf-contrast-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text2);
}
.pdf-contrast-row input { flex: 1; accent-color: var(--accent); }

.pdf-top-row {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
}

.pdf-whole-btn {
  flex: 1;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.pdf-whole-btn:active { opacity: .75; }

.pdf-text-btn {
  flex: 1;
  background: var(--card2);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.pdf-text-btn:active { opacity: .75; }

.pdf-new-btn {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.pdf-new-btn:active { opacity: .75; }

.pdf-controls {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.pdf-ctrl-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pdf-ctrl-label {
  font-size: 11px;
  color: var(--text2);
  min-width: 52px;
}

.pdf-ctrl-row input[type=range] {
  flex: 1;
  accent-color: var(--accent);
}

.pdf-ctrl-val {
  font-size: 11px;
  color: var(--text2);
  min-width: 24px;
  text-align: right;
}

.pdf-info-box {
  margin-top: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pdf-info-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text2);
}
.pdf-info-row b { color: var(--text); }
.pdf-info-row em { color: var(--accent); font-style: normal; font-weight: 600; }

.pdf-info-icon { font-size: 22px; flex-shrink: 0; margin-top: 1px; }

.pdf-canvas-wrap {
  position: relative;
  flex: 1;
  overflow: auto;
  background: #444;
  border: 1px solid var(--border);
  border-top: none;
  cursor: crosshair;
  -webkit-overflow-scrolling: touch;
}

#pdfPageCanvas {
  display: block;
  /* width set by JS */
}

#pdfOverlayCanvas {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
}

.pdf-preview-bar {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 10px;
  flex-shrink: 0;
}

.pdf-preview-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .7px;
  margin-bottom: 8px;
}

.pdf-strip-wrap {
  background: #fff;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 10px;
  max-height: 160px;
  overflow-y: auto;
}

#pdfStripCanvas {
  display: block;
  width: 100%;
  height: auto;
}

.pdf-print-row {
  display: flex;
  gap: 10px;
}

/* ── TOAST ───────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(var(--safe-bottom) + 18px);
  left: 50%; transform: translateX(-50%) translateY(16px);
  background: #2a2a3a; color: #fff;
  padding: 9px 20px; border-radius: 20px;
  font-size: 13px; font-weight: 500;
  opacity: 0; transition: opacity .22s, transform .22s;
  z-index: 999; pointer-events: none;
  white-space: nowrap; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: #1e4d1e; }
.toast.error   { background: #4d1e1e; }