/* ============================================================
   拼音田字格生成器 — 样式表
   设计系统参考：Apple（排版哲学）+ Linear（组件精度）
   生成依据：DESIGN.md v1.0
   ============================================================ */

/* ---- Vue cloak: hide uncompiled templates until mount ---- */
[v-cloak] { display: none; }

/* ---- CSS Custom Properties ---- */
:root {
  /* Primary */
  --color-primary: #3B6EA8;
  --color-primary-hover: #3270A0;
  --color-primary-active: #2A5E8F;
  --color-primary-light: #E8F0F8;
  --color-primary-lighter: #F4F8FC;

  /* Vermilion */
  --color-vermilion: #D14545;
  --color-vermilion-soft: #E88080;

  /* Neutrals */
  --color-ink: #2D2D2D;
  --color-ink-soft: #4A4A4A;
  --color-gray-600: #6B6B6B;
  --color-gray-500: #9B9B9B;
  --color-gray-400: #CCCCCC;
  --color-gray-300: #E0E0E0;
  --color-gray-200: #EEEEEE;
  --color-gray-100: #F5F5F5;

  /* Surfaces */
  --color-canvas: #FAF9F6;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-hairline: #E8E6E0;
  --color-hairline-strong: #D0CDC5;

  /* Semantic */
  --color-success: #2D9D5F;
  --color-warning: #C8821A;
  --color-error: #D14545;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(45,45,45,0.04);
  --shadow-sm: 0 1px 3px rgba(45,45,45,0.06);
  --shadow-md: 0 4px 12px rgba(45,45,45,0.08);
  --shadow-lg: 0 8px 24px rgba(45,45,45,0.10);
  --shadow-xl: 0 8px 32px rgba(45,45,45,0.16);

  /* Typography */
  --font-ui: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-hanzi: "KaiTi", "STKaiti", "楷体", "FangSong", "STFangsong", serif;
  --font-pinyin: system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Spacing */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;

  /* Radii */
  --radius-sm: 3px;
  --radius-md: 3px;
  --radius-lg: 3px;
  --radius-xl: 3px;

  /* Grid Size (updated by JS) */
  --grid-size: 80px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 200ms;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-ink);
  background-color: var(--color-canvas);
  overflow: hidden;
  height: 100vh;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---- Toolbar ---- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 var(--space-lg);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-hairline);
  flex-shrink: 0;
  z-index: 100;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.app-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.toolbar-center {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.btn-settings-toggle {
  display: none;
}

/* ---- Buttons ---- */
.btn-primary,
.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-ui);
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  outline: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 14px;
  line-height: 1.2;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
}

.btn-primary:active {
  background-color: var(--color-primary-active);
  transform: scale(0.98);
}

.btn-primary:disabled {
  background-color: var(--color-gray-400);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 14px;
  line-height: 1.2;
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-lighter);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-gray-600);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-size: 14px;
}

.btn-ghost:hover {
  color: var(--color-ink);
  background-color: var(--color-gray-100);
}

.btn-icon {
  padding: 8px;
}

.btn-icon svg {
  flex-shrink: 0;
}

/* ---- Main Content ---- */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ---- Settings Panel ---- */
.settings-panel {
  width: 280px;
  flex-shrink: 0;
  overflow-y: auto;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-hairline);
  padding: var(--space-lg);
  /* Hidden by default; toggled via .open */
  width: 0;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border-right: none;
  transition: width var(--duration-normal) var(--ease-out),
              padding var(--duration-normal) var(--ease-out);
}

/* Desktop: panel always visible, regardless of .open */
@media (min-width: 769px) {
  .settings-panel {
    width: 280px;
    min-width: 0;
    padding: var(--space-lg);
    border-right: 1px solid var(--color-hairline);
    overflow-y: auto;
  }
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

.settings-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
}

.settings-close {
  display: none;
}

.settings-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.settings-item-row {
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.settings-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.settings-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
}

.settings-value {
  font-size: 12px;
  color: var(--color-gray-600);
  font-variant-numeric: tabular-nums;
}

.slider-bounds {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-gray-500);
}

/* ---- Range Slider ---- */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--color-gray-200);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: box-shadow var(--duration-fast);
}

.slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 4px rgba(59, 110, 168, 0.15);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
}

/* ---- Segmented Control ---- */
.segmented-control {
  display: flex;
  background-color: var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 1px;
}

.seg-btn {
  flex: 1;
  padding: 6px 0;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-600);
  background: transparent;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.seg-btn:hover {
  color: var(--color-ink);
}

.seg-btn.active {
  background-color: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}

/* ---- Toggle Switch ---- */
.toggle-switch {
  position: relative;
  width: 40px;
  height: 24px;
  background-color: var(--color-gray-300);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out);
  padding: 0;
}

.toggle-switch.on {
  background-color: var(--color-primary);
}

.toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: #FFFFFF;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out);
}

.toggle-switch.on .toggle-knob {
  transform: translateX(16px);
}

/* ---- Preview Area ---- */
.preview-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: auto;
  padding: var(--space-xxl);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: #E8E8E4;
}

/* ---- A4 Paper Page ---- */
.a4-page {
  width: 210mm;
  min-height: 297mm;
  background: #FFFFFF;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.08);
  padding: 15mm;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-shrink: 0;
  overflow-x: auto;  /* last-resort defense against overflow */
  box-sizing: border-box;
}

/* ---- Empty State ---- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xxl) var(--space-lg);
  text-align: center;
  min-height: 300px;
}

.empty-state-icon {
  font-family: var(--font-hanzi);
  font-size: 72px;
  color: var(--color-hairline-strong);
  margin-bottom: var(--space-lg);
  line-height: 1;
}

.empty-state-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-xs);
}

.empty-state-hint {
  font-size: 14px;
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.empty-state-examples {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
}

.example-chip {
  padding: 6px 14px;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--color-primary);
  background-color: var(--color-primary-lighter);
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.example-chip:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
}

/* ---- Page Viewer (carousel mode) ---- */
.page-viewer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

/* On screen: only the active page is visible */
.page-viewer .a4-page {
  display: none;
}

.page-viewer .a4-page.page-active {
  display: flex;
}

/* ---- Top Navigation Bar ---- */
.page-navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.page-num-label {
  font-size: 13px;
  font-family: var(--font-ui);
  color: var(--color-ink-soft);
  font-weight: 500;
  letter-spacing: 0.3px;
  user-select: none;
}

/* ---- Page Stage (paper + side arrows) ---- */
.page-stage {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-md);
}

/* ---- Page Navigation Arrows (on sides of paper) ---- */
.page-nav {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-hairline-strong);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  margin-top: 80px; /* roughly align with first row of grid */
}

.page-nav:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-lighter);
  box-shadow: var(--shadow-sm);
}

.page-nav:active:not(:disabled) {
  transform: scale(0.93);
}

.page-nav:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

/* ---- Page Dots (inside navbar) ---- */
.page-dots {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: var(--space-sm);
  padding-left: var(--space-sm);
  border-left: 1px solid var(--color-hairline);
}

.page-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: none;
  background: var(--color-gray-300);
  cursor: pointer;
  padding: 0;
  transition: all var(--duration-fast) var(--ease-out);
}

.page-dot:hover {
  background: var(--color-primary-light);
}

.page-dot.active {
  background: var(--color-primary);
  width: 20px;
  border-radius: 3px;
}

.grid-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.grid-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  align-items: flex-start;
  position: relative;
}

.grid-row.row-break {
  margin-top: calc(var(--grid-size) * 0.4 + var(--space-sm));
}

/* ---- Cell Stack (Pinyin Grid + Tian Zi Ge) ---- */
.cell-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

/* Pinyin slot — always reserves space for alignment */
.pinyin-slot {
  width: var(--grid-size);
  height: calc(var(--grid-size) * 0.48);
  flex-shrink: 0;
}

/* ---- Pinyin Four-Line Three-Row Grid ---- */
.pinyin-grid {
  position: relative;
  width: var(--grid-size);
  height: calc(var(--grid-size) * 0.48);
  display: flex;
  align-items: center;
  justify-content: center;
  /* Borders removed — now drawn at row level via .pinyin-lines */
  transition: opacity var(--duration-fast) var(--ease-out);
}

/* ---- Pinyin Continuous Lines (row-level, spans all cells) ---- */
.pinyin-lines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: calc(var(--grid-size) * 0.48);
  pointer-events: none;
  z-index: 0;
  border-top: 1.5px solid var(--color-primary);
  border-bottom: 1.5px solid var(--color-primary);
}

.pinyin-lines::before,
.pinyin-lines::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  border-top: 0.5px dashed var(--color-primary-light);
}

.pinyin-lines::before { top: 33.33%; }
.pinyin-lines::after  { top: 66.66%; }

.pinyin-grid.clickable {
  cursor: pointer;
}

.pinyin-grid.clickable:hover {
  background-color: rgba(59, 110, 168, 0.04);
}

.pinyin-text {
  font-family: var(--font-pinyin);
  font-size: calc(var(--grid-size) * 0.18);
  color: var(--color-primary);
  line-height: 1;
  z-index: 1;
  white-space: nowrap;
  user-select: none;
}

.pinyin-grid.clickable .pinyin-text {
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}

.pinyin-grid.clickable:hover .pinyin-text {
  text-decoration: underline;
}

.polyphone-mark {
  font-size: calc(var(--grid-size) * 0.09);
  color: var(--color-vermilion);
  line-height: 1;
  margin-left: 1px;
  z-index: 1;
}

/* ---- Tian Zi Ge Cell ---- */
.tianzige-cell {
  position: relative;
  width: var(--grid-size);
  height: var(--grid-size);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-vermilion);
  flex-shrink: 0;
  background-color: var(--color-surface);
}

/* Cross Hairlines */
.tianzige-cell::before,
.tianzige-cell::after {
  content: '';
  position: absolute;
  border: none;
  opacity: 0.45;
}

/* Horizontal cross */
.tianzige-cell::before {
  left: 0;
  right: 0;
  top: 50%;
  border-top: 1px dashed var(--color-vermilion);
}

/* Vertical cross */
.tianzige-cell::after {
  top: 0;
  bottom: 0;
  left: 50%;
  border-left: 1px dashed var(--color-vermilion);
}

.tianzige-cell.no-guides::before,
.tianzige-cell.no-guides::after {
  opacity: 0;
}

/* Hanzi in cell */
.tianzige-hanzi {
  font-family: var(--font-hanzi);
  font-size: calc(var(--grid-size) * 0.6);
  color: var(--color-ink);
  line-height: 1;
  z-index: 1;
  user-select: none;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.tianzige-hanzi.hidden {
  opacity: 0;
}

/* ---- Inline non-Chinese characters ---- */
.inline-word {
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--color-ink);
  padding: 4px 2px;
  line-height: var(--grid-size);
}

.inline-punct {
  font-family: var(--font-ui);
  font-size: 16px;
  color: var(--color-gray-500);
  padding: 4px 1px;
  line-height: var(--grid-size);
}

/* ---- Input Area ---- */
.input-area {
  flex-shrink: 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-hairline);
  transition: all var(--duration-normal) var(--ease-out);
}

.input-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  cursor: pointer;
  user-select: none;
}

.input-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-soft);
}

.input-meta {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.char-count {
  font-size: 12px;
  color: var(--color-gray-500);
  font-variant-numeric: tabular-nums;
}

.input-arrow {
  transition: transform var(--duration-fast) var(--ease-out);
  color: var(--color-gray-500);
}

.input-arrow.rotated {
  transform: rotate(180deg);
}

.input-body {
  padding: 0 var(--space-lg) var(--space-lg);
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
}

.input-area.collapsed .input-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

.text-input {
  width: 100%;
  min-height: 80px;
  max-height: 150px;
  padding: var(--space-sm) 14px;
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--radius-md);
  outline: none;
  resize: vertical;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.text-input::placeholder {
  color: var(--color-gray-500);
}

.text-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 110, 168, 0.12);
}

/* ---- Modal / Popup ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(45, 45, 45, 0.40);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--duration-fast) var(--ease-out);
}

.modal {
  background-color: var(--color-surface-elevated);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  max-width: 360px;
  width: calc(100% - 32px);
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--duration-normal) var(--ease-out);
}

.polyphonic-modal {
  text-align: center;
  max-width: 320px;
}

.polyphonic-char {
  font-family: var(--font-hanzi);
  font-size: 48px;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
  line-height: 1;
}

.polyphonic-hint {
  font-size: 13px;
  color: var(--color-gray-600);
  margin-bottom: var(--space-md);
}

.polyphonic-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.polyphonic-option {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-pinyin);
  font-size: 16px;
  color: var(--color-ink);
  background-color: var(--color-gray-100);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-align: center;
}

.polyphonic-option:hover {
  background-color: var(--color-primary-lighter);
  border-color: var(--color-primary);
}

.polyphonic-option.selected {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  z-index: 1100;
  box-shadow: var(--shadow-md);
  animation: fadeIn var(--duration-fast) var(--ease-out);
  pointer-events: none;
}

.toast.success {
  background-color: var(--color-success);
  color: #FFFFFF;
}

.toast.info {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.toast.warning {
  background-color: var(--color-warning);
  color: #FFFFFF;
}

.toast.error {
  background-color: var(--color-error);
  color: #FFFFFF;
}

/* ---- Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---- Print Styles ---- */
@media print {
  @page {
    size: A4;
    margin: 20mm;
  }

  html, body {
    background: #FFFFFF !important;
    overflow: visible !important;
    height: auto !important;
  }

  #app {
    height: auto !important;
    overflow: visible !important;
  }

  .toolbar,
  .settings-panel,
  .input-area {
    display: none !important;
  }

  .main-content {
    flex-direction: column !important;
    overflow: visible !important;
  }

  .preview-area {
    padding: 0 !important;
    overflow: visible !important;
    width: 100% !important;
    background: #FFFFFF !important;
  }

  .page-viewer {
    gap: 0 !important;
    display: block !important;
  }

  .page-viewer .a4-page {
    display: flex !important;
  }

  .page-navbar,
  .page-nav {
    display: none !important;
  }

  .a4-page {
    width: 100% !important;
    min-height: auto !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: #FFFFFF !important;
    page-break-after: always;
  }

  .a4-page:last-child {
    page-break-after: auto;
  }

  .tianzige-cell {
    border-color: var(--color-vermilion) !important;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .pinyin-lines {
    border-top-color: #3B6EA8 !important;
    border-bottom-color: #3B6EA8 !important;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .tianzige-hanzi {
    color: #1a1a1a !important;
  }

  .pinyin-text {
    color: #333333 !important;
  }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  /* Toolbar */
  .toolbar {
    padding: 0 var(--space-md);
    height: 52px;
  }

  .app-title {
    font-size: 16px;
  }

  .btn-settings-toggle {
    display: flex;
  }

  .btn-text {
    display: none;
  }

  .btn-primary,
  .btn-secondary {
    padding: 8px 10px;
  }

  /* Settings Panel → Bottom drawer */
  .settings-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100% !important;
    max-width: 100%;
    max-height: 60vh;
    min-width: 0;
    border-right: none;
    border-radius: 16px 16px 0 0;
    box-shadow: var(--shadow-xl);
    z-index: 300;
    transform: translateY(100%);
    padding: var(--space-lg);
    overflow-y: auto;
    transition: transform var(--duration-normal) var(--ease-out);
  }

  .settings-panel.open {
    transform: translateY(0);
    width: 100% !important;
    padding: var(--space-lg);
    overflow-y: auto;
  }

  .settings-close {
    display: flex;
  }

  /* Main Content */
  .main-content {
    flex-direction: column;
  }

  /* Preview */
  .preview-area {
    padding: var(--space-sm);
  }

  .a4-page {
    width: 100%;
    min-height: auto;
    padding: var(--space-md);
    box-shadow: 0 1px 6px rgba(0,0,0,0.08);
  }

  .grid-row {
    gap: 2px;
  }

  /* Input */
  .input-toolbar {
    padding: var(--space-sm) var(--space-md);
  }

  .input-body {
    padding: 0 var(--space-md) var(--space-md);
  }
}