/* 口算题生成器页面样式 */

.kids-tool-hero__facts--compact {
  gap: 10px;
  align-content: center;
}

.kids-tool-hero__facts--compact .kids-tool-fact {
  padding: 10px 14px;
  border-radius: 16px;
}

.kids-tool-hero__facts--compact .kids-tool-fact__label {
  margin-bottom: 4px;
}

.kids-tool-hero__facts--compact .kids-tool-fact__value {
  font-size: 16px;
}

.paper-preview-stack {
  width: min(100%, 210mm);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.tool-preview__paper {
  padding: 18px 16px;
  overflow-x: hidden;
  overflow-y: auto;
}

.paper-page {
  background: #fff;
  border: 1px solid rgba(217, 222, 234, 0.82);
  border-radius: 10px;
  box-shadow: 0 22px 42px rgba(36, 48, 71, 0.08);
}

.paper-page--measure {
  width: 210mm;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.paper-page__inner {
  padding: 15mm;
}

.paper-page__inner--measure {
  box-sizing: border-box;
  width: 210mm;
  height: 297mm;
  overflow: hidden;
}

.paper-page--measure .paper-page__continued {
  margin-bottom: 12pt;
}

.paper-page--measure .paper-header__title {
  font-size: 20pt;
}

.paper-page--measure .problems-grid {
  font-size: 14pt;
}

.paper-page--measure .problem-blank {
  border-bottom-color: #000;
}

.paper-page--measure .paper-header {
  border-bottom-color: #000;
}

.paper-page--measure .paper-header__underline {
  border-bottom-color: #000;
}

.paper-page--measure .answer-section {
  border-top-color: #ccc;
}

.paper-page__continued {
  margin-bottom: 18px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--kids-text-muted);
  letter-spacing: 0.08em;
}

.problems-grid {
  display: grid;
  gap: 10px 22px;
  font-size: 16px;
  font-family: var(--kids-font-mono);
  counter-reset: problem;
}

.problems-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.problems-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.problems-grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.problems-grid.cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.problem-item {
  display: flex;
  align-items: baseline;
  min-width: 0;
  gap: 6px;
  padding: 8px 4px;
  border-bottom: 1px solid rgba(217, 222, 234, 0.7);
  counter-increment: problem;
  white-space: nowrap;
}

.problem-item::before {
  content: counter(problem) '.';
  color: var(--kids-text-muted);
  font-size: 12px;
  min-width: 24px;
  text-align: right;
}

.problem-text {
  flex: 1;
  min-width: 0;
}

.problem-blank {
  display: inline-block;
  width: 40px;
  border-bottom: 2px solid var(--kids-text);
  margin: 0 2px;
}

.paper-header {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 2px solid rgba(33, 48, 71, 0.86);
}

.paper-header__title {
  font-size: 24px;
  font-weight: 700;
  font-family: var(--kids-font-display);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.paper-header__info {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  font-family: var(--kids-font);
  color: var(--kids-text);
}

.paper-header__field {
  white-space: nowrap;
}

.paper-header__underline {
  display: inline-block;
  width: 80px;
  border-bottom: 1px solid var(--kids-text);
  margin-left: 4px;
}

.answer-section {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 2px dashed rgba(217, 222, 234, 0.95);
}

.answer-section__title {
  font-size: 16px;
  font-weight: 700;
  font-family: var(--kids-font-display);
  text-align: center;
  margin-bottom: 14px;
  color: var(--kids-text-secondary);
}

.answer-grid {
  display: grid;
  gap: 4px 12px;
  font-size: 13px;
  font-family: var(--kids-font-mono);
  color: var(--kids-text-muted);
}

.answer-grid.cols-5 { grid-template-columns: repeat(5, 1fr); }
.answer-grid.cols-8 { grid-template-columns: repeat(8, 1fr); }
.answer-grid.cols-10 { grid-template-columns: repeat(10, 1fr); }

.answer-item {
  padding: 4px 4px;
}

.preview-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  color: var(--kids-text-muted);
  font-size: 18px;
  text-align: center;
  line-height: 1.8;
}

.preview-placeholder--sample {
  align-items: stretch;
  justify-content: stretch;
  color: var(--kids-text);
}

.preview-sample {
  width: 100%;
}

.preview-sample .problems-grid {
  gap: 8px 18px;
  font-size: 14px;
}

.preview-sample .problem-item {
  padding: 6px 2px;
}

.preview-sample .paper-header {
  margin-bottom: 18px;
  padding-bottom: 12px;
}

.preview-sample .paper-header__title {
  font-size: 18px;
}

.preview-sample .paper-header__info {
  font-size: 12px;
}

.preview-sample .paper-header__underline {
  width: 56px;
}

.preview-sample__note {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(47, 111, 237, 0.06);
  color: var(--kids-text-secondary);
  font-size: 13px;
}

.preview-sample__note strong {
  color: var(--kids-primary-dark);
}

@media (min-width: 768px) {
  .kids-tool-hero__facts--compact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
  }
}

@media print {
  .paper-preview-stack {
    width: 100% !important;
    max-width: none !important;
    gap: 0 !important;
  }

  .paper-page {
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    break-after: page;
    page-break-after: always;
  }

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

  .paper-page__inner {
    padding: 0 !important;
  }

  .paper-page__continued {
    margin-bottom: 12pt;
    color: #666 !important;
  }

  .paper-header__title {
    font-size: 20pt;
  }

  .problems-grid {
    font-size: 14pt;
  }

  .problem-blank {
    border-bottom-color: #000 !important;
  }

  .paper-header {
    border-bottom-color: #000 !important;
  }

  .paper-header__underline {
    border-bottom-color: #000 !important;
  }

  .answer-section {
    border-top-color: #ccc !important;
  }
}