/**

 * L00 底栏：左区（页间）| 居中 Logo | 右区（课内步骤 + 页间）

 */

body.has-lesson-pager > .footer-bar {

  display: none !important;

}



body.has-lesson-pager:has(nav.lesson-pager.is-l00-unified) {

  padding-bottom: max(var(--grammar-pager-gap, 2.85rem), env(safe-area-inset-bottom, 0px)) !important;

}



body.has-lesson-pager:has(nav.lesson-pager.is-l00-unified) #app {

  padding-bottom: calc(var(--grammar-pager-gap, 2.85rem) + 0.75rem) !important;

}



/* 三列：左按钮组 | Logo | 右按钮组 */

body.has-lesson-pager nav.lesson-pager.is-l00-unified {

  grid-template-columns: minmax(0, 1fr) var(--grammar-pager-logo-slot, 5.5rem) minmax(0, 1fr) !important;

  column-gap: 0.35rem;

  row-gap: 0;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-zone--left {

  grid-column: 1;

  justify-self: stretch;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-logo {

  grid-column: 2;

  justify-self: center;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-zone--right {

  grid-column: 3;

  justify-self: stretch;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-zone {

  display: flex;

  align-items: center;

  gap: 0.28rem;

  min-width: 0;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-zone--left {

  justify-content: flex-start;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified > .pager-zone--right {

  justify-content: flex-end;

}



/* 区内按钮等宽、不撑破 */

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-prev,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-next,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > span.pager-prev,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > span.pager-next,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-lesson-index,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-prev,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-next {

  flex: 1 1 0;

  min-width: 0;

  max-width: none;

  min-height: 34px;

  max-height: 38px;

  display: flex;

  align-items: center;

  justify-content: center;

  margin: 0;

  padding: 0.22rem 0.32rem;

  border-radius: 8px;

  border: 1.5px solid #5d4037;

  font-size: clamp(0.62rem, 1.85vw, 0.74rem);

  font-weight: 800;

  line-height: 1.15;

  text-align: center;

  text-decoration: none;

  cursor: pointer;

  touch-action: manipulation;

  box-sizing: border-box;

  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

  box-shadow: 0 1px 0 rgba(93, 64, 55, 0.1);

  transition: filter 0.15s ease, transform 0.1s ease;

}



body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--left > .pager-prev,

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--left > span.pager-prev {

  color: #334155;

  background: linear-gradient(180deg, #fff, #f8fafc);

  flex: 0.95 1 0;

}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--left > .pager-lesson-index {
  flex: 1.05 1 0;
  color: var(--grammar-pager-accent-ink, #0f766e) !important;
  background: linear-gradient(180deg, #f0fdfa, #ccfbf1) !important;
  border-color: var(--grammar-pager-accent, #0d9488) !important;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--right > button.pager-step-prev {
  color: #334155;
  background: linear-gradient(180deg, #fff, #f8fafc);
  flex: 0.9 1 0;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--right > button.pager-step-next {
  flex: 1 1 0;
  color: #4e342e !important;
  background: linear-gradient(180deg, #ffe082, #ffca28) !important;
  border-color: #5d4037 !important;
  box-shadow: 0 2px 0 rgba(93, 64, 55, 0.2) !important;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--right > .pager-next,
body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone--right > span.pager-next {
  flex: 0.95 1 0;
  color: #fff !important;
  background: linear-gradient(135deg, #14b8a6, var(--grammar-pager-accent-ink, #0f766e)) !important;
  border-color: var(--grammar-pager-accent-ink, #0f766e) !important;
  box-shadow: 0 2px 0 rgba(15, 118, 110, 0.28) !important;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-prev:disabled,
body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-next:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  box-shadow: none;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-muted {
  opacity: 0.42;
  cursor: not-allowed;
  box-shadow: none;
  pointer-events: none;
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > a:hover,
body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button:hover:not(:disabled) {
  filter: brightness(1.04);
}

body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > a:active,
body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button:active:not(:disabled) {
  transform: translateY(1px);
}

@media (min-width: 640px) {
  body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-prev,
  body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-next,
  body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > .pager-lesson-index,
  body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-prev,
  body.has-lesson-pager nav.lesson-pager.is-l00-unified .pager-zone > button.pager-step-next {
    min-height: 36px;
    max-height: 40px;
    font-size: clamp(0.66rem, 1.9vw, 0.76rem);
  }
}