/**
 * 定语从句 · 禁止整页滚动；区内溢出时由 l13rc-scrollable.css 显示滚动条
 * 视口适配见 l13rc-fit-viewport.js（先适度缩放，仍放不下则滚动）
 */
html.l13rc-no-scroll-root {
  height: 100%;
  overflow: hidden !important;
}

html.l13rc-no-scroll-root body.l13rc-no-scroll {
  overflow: hidden !important;
  max-height: 100dvh;
  overscroll-behavior: none;
}

/* 讲义：屏幕阅读可滚轮翻页，但不显示滚动条 */
@media screen {
  body.l13rc-no-scroll.grammar-handout-page {
    overflow: hidden !important;
  }

  body.l13rc-no-scroll.grammar-handout-page > main.sheet {
    display: block;
    box-sizing: border-box;
    height: calc(100dvh - var(--lesson-pager-gap, 2.35rem) - env(safe-area-inset-top, 0px) - 8px) !important;
    max-height: calc(100dvh - var(--lesson-pager-gap, 2.35rem) - env(safe-area-inset-top, 0px) - 8px) !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    margin-left: auto;
    margin-right: auto;
  }
}

/* 目录页 */
body.l13rc-no-scroll.g-index-scaled {
  overflow: hidden !important;
  height: 100dvh;
}

body.l13rc-no-scroll.g-index-scaled .g-index {
  max-height: calc(100dvh - 2rem);
  overflow-y: auto;
  overflow-x: hidden;
}

/* 区内滚动细节见 assets/l13rc-scrollable.css */
/* 缩放目标：居中、顶部对齐 */
.l13rc-fit-target {
  transform-origin: top center !important;
  flex-shrink: 1;
  min-height: 0 !important;
  max-height: 100%;
}

body.l13rc-no-scroll > .app-container > .page.active.l13rc-fit-target {
  width: 100%;
  align-self: center;
}

@media print {
  html.l13rc-no-scroll-root,
  html.l13rc-no-scroll-root body.l13rc-no-scroll {
    overflow: visible !important;
    height: auto !important;
    max-height: none !important;
  }

  .l13rc-fit-target {
    transform: none !important;
  }

  body.l13rc-no-scroll.grammar-handout-page > main.sheet {
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }
}