/* Reading view (lecture-NN-read.html, built by build_site_20762.py): every slide of a
   lecture reflowed into one scrolling page that fills a phone's width. Loaded after
   slides.css, whose card/table/list styles it reuses; the rules below undo the fixed
   1024x768 slide layout and shrink the type scale. */

body.reading {
  --font-title: 21px;
  --font-subtitle: 16px;
  --font-body: 16px;
  --font-nested: 15px;
  --font-table: 13px;
  --font-caption: 12px;
  --line-height-base: 1.6;
  margin: 0;
  padding: 0;
  background: #f1f5f9;
  color: var(--theme-text);
  font-family: var(--font-stack);
  font-size: var(--font-body);
  line-height: var(--line-height-base);
  -webkit-text-size-adjust: 100%;
  /* the page never pans sideways; wide tables and formulas scroll inside their own box */
  overflow-x: clip;
}

/* Top bar */
.read-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: #ffffff;
  border-bottom: 1px solid var(--theme-surface-border);
  font-size: 14px;
}

.read-bar a {
  color: var(--theme-accent);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.read-bar-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
  color: var(--theme-primary);
}

.read-lang {
  display: inline-flex;
  flex: none;
  border: 1px solid var(--theme-surface-border);
  border-radius: 6px;
  overflow: hidden;
}

.read-lang button {
  font: inherit;
  font-size: 13px;
  padding: 3px 8px;
  border: 0;
  background: #ffffff;
  color: var(--theme-text-muted);
  cursor: pointer;
}

.read-lang button[aria-pressed="true"] {
  background: var(--theme-accent);
  color: #ffffff;
}

/* Language switch: lang-zh, lang-en or lang-both on <body> */
body.lang-zh .read-en,
body.lang-en .read-zh {
  display: none !important;
}

body.lang-both .read-slide .read-en {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--theme-surface-border);
}

body.lang-both .read-toc .read-en::before {
  content: " · ";
}

body.lang-both .read-toc .read-en {
  color: var(--theme-text-muted);
}

/* Page */
.read-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 6px 0 48px 0;
}

body.lang-both .read-bar .read-en,
body.lang-both .read-toc summary .read-en {
  display: none;
}

.read-toc,
.read-slide {
  background: #ffffff;
  border-top: 1px solid var(--theme-surface-border);
  border-bottom: 1px solid var(--theme-surface-border);
  margin: 10px 0;
  padding: 12px 14px;
}

.read-toc summary {
  font-weight: 700;
  color: var(--theme-primary);
  cursor: pointer;
}

.read-toc ol {
  margin: 8px 0 0 0;
  padding-left: 1.6em;
}

.read-toc li {
  margin: 4px 0;
}

.read-toc a {
  color: var(--theme-text);
  text-decoration: none;
}

.read-slide {
  scroll-margin-top: 48px;
}

.read-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--theme-text-light);
}

.read-meta a {
  color: var(--theme-accent);
  text-decoration: none;
  white-space: nowrap;
}

@media (min-width: 720px) {
  .read-toc,
  .read-slide {
    margin: 14px 12px;
    padding: 18px 24px;
    border: 1px solid var(--theme-surface-border);
    border-radius: 10px;
  }
}

/* Undo the fixed slide layout inside each reflowed slide */
.read-body .slide-content {
  max-height: none;
}

.read-body .slide-title {
  margin-bottom: 10px;
}

.read-body .title-slide-container {
  height: auto;
  padding: 6px 0;
  background: none;
}

.read-body .title-slide-h1 {
  font-size: 24px;
}

.read-body .title-slide-h2 {
  font-size: 16px;
  margin-bottom: 12px;
}

.read-body .tip-of-the-week-box {
  margin: 10px 0;
  padding: 12px 14px;
}

.read-body .uts-logo-text {
  display: none;
}

.read-body div {
  height: auto !important;
  max-height: none !important;
}

.read-body img {
  max-width: 100% !important;
  height: auto !important;
}

.read-body svg:not(mjx-container svg) {
  max-width: 100%;
  height: auto;
}

/* Wide content scrolls sideways inside its own box instead of widening the page:
   tables (in a .read-scroll wrapper added by the build), display formulas, flow rows
   (.read-flow, also added by the build) and inline formulas too wide for their line
   (.read-wide, set by the page script). .more-right fades the right edge while there
   is more to scroll to. */
.read-body .read-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin: 6px 0;
}

.read-body .read-scroll > table {
  margin: 0;
  overflow-wrap: normal;
}

/* let headers wrap instead of running into the next column, but not letter by letter */
.read-body .read-scroll :is(td, th) {
  white-space: normal !important;
  min-width: 4.5em;
}

/* --fade (set by the page script) is the hidden width + 8px, at most 36px, so a box
   missing only a few pixels does not dim visible content */
.read-body .more-right {
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - var(--fade, 36px)), transparent);
  mask-image: linear-gradient(to right, #000 calc(100% - var(--fade, 36px)), transparent);
}

.read-body mjx-container[display="true"] {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Formulas shrink to fit the column, but not below 70% of their size: the build sets
   each SVG's min-width, which wins over max-width; past that they scroll. */
.read-body mjx-container > svg {
  max-width: 100%;
  height: auto;
}

.read-body mjx-container.read-wide {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  vertical-align: middle;
}

/* formula + punctuation kept on one line: leave room for the punctuation */
.read-body span[style*="nowrap"] > mjx-container > svg,
.read-body span[style*="nowrap"] > mjx-container.read-wide {
  max-width: calc(100% - 1.2em);
}

/* MathJax's hidden screen-reader copy is clipped but would still widen the page */
.read-body mjx-container mjx-assistive-mml {
  width: 100% !important;
}

/* Inside (scrolling) tables formulas keep their natural size */
.read-body :is(td, th) mjx-container > svg,
.read-body :is(td, th) span[style*="nowrap"] > mjx-container > svg {
  max-width: none;
}

.read-body :is(p, li, div):not(:is(td, th) *) {
  overflow-wrap: anywhere;
}

/* captions set to 0.6em of the slide font are too small at reading size */
.read-body [style*="font-size: 0.6em"] {
  font-size: 12px !important;
}

.read-body :where(ul, ol) {
  padding-left: 1.3em;
}

/* Same as the deck's .reveal ul.text-list (slides.css) */
.read-body ul.text-list {
  display: block;
  list-style: none;
  margin: 2px 0;
  padding: 0;
}

.read-body ul.text-list > li {
  position: relative;
  padding-left: 1.1em;
  margin: 0;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

.read-body ul.text-list > li::before {
  content: "•";
  position: absolute;
  left: 0.2em;
  top: 0;
  width: auto;
  height: auto;
  border-radius: 0;
  background: none;
}

/* Phones: side-by-side columns stack, flex rows wrap */
@media (max-width: 640px) {
  .read-body [style*="grid-template-columns"] {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .read-body [style*="display: flex"],
  .read-body [style*="display:flex"] {
    flex-wrap: wrap;
  }

  .read-body [style*="display: flex"] > *,
  .read-body [style*="display:flex"] > * {
    min-width: 0;
    max-width: 100% !important;
  }

  /* flex rows with a gap are side-by-side cards or columns: one per line */
  .read-body [style*="display: flex"][style*="gap"] > *,
  .read-body [style*="display:flex"][style*="gap"] > * {
    flex: 1 1 100% !important;
  }

  /* "party - arrows - party" flow rows keep their order on one line and scroll */
  .read-body .read-flow {
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .read-body .read-flow > * {
    min-width: min-content;
  }

  .read-body .read-flow * {
    overflow-wrap: normal;
  }
}