/* Same Cactus palette and self-hosted font as the SAP-C03 reader. */
@font-face {
  font-family: "Roboto Slab";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/lib/roboto-slab/RobotoSlab-Vietnamese.woff2") format("woff2");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}

@font-face {
  font-family: "Roboto Slab";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/lib/roboto-slab/RobotoSlab-Variable.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CD-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Roboto Slab";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/lib/roboto-slab/RobotoSlab-Latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: light;
  --eng-bg: #fafafa;
  --eng-text: #22272a;
  --eng-accent: #cc2a41;
  --eng-muted: #666;
  --eng-line: #dedede;
  --eng-tint: rgba(204, 42, 65, .055);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { height: 100%; border-top: 2px solid var(--eng-text); }
body {
  margin: 0;
  background: var(--eng-bg);
  color: var(--eng-text);
  font: 16px/1.7 "Roboto Slab", Georgia, "Times New Roman", serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-underline-offset: .2em; }
a:hover { color: var(--eng-accent); }
button, input, select { font: inherit; color: inherit; }
button, select { cursor: pointer; }
button, input, select { border: 1px solid var(--eng-line); border-radius: 5px; background: var(--eng-bg); }
button { padding: .35rem .7rem; }
button:hover { border-color: var(--eng-accent); color: var(--eng-accent); }
:focus-visible { outline: 2px solid var(--eng-accent); outline-offset: 3px; }
.eng-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.eng-skip { position: fixed; top: -100px; left: 1rem; z-index: 5; padding: .6rem 1rem; background: var(--eng-bg); }
.eng-skip:focus { top: .5rem; }
.eng-topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; min-height: 78px; padding: .85rem 1.5rem; border-bottom: 1px solid var(--eng-line); }
.eng-brand { display: flex; align-items: baseline; gap: 1rem; text-decoration: none; }
.eng-brand strong { color: var(--eng-accent); font-size: 1.35rem; }
.eng-brand span { font-size: .85rem; color: var(--eng-muted); }
.eng-topbar nav { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem; font-size: .85rem; }
#eng-random { min-height: 44px; white-space: nowrap; }
.eng-topbar nav a { white-space: nowrap; }
.eng-workspace { display: grid; grid-template-columns: 350px minmax(0, 1fr); }
.eng-sidebar { min-width: 0; border-right: 1px solid var(--eng-line); }
.eng-filters { padding: 1.2rem 1.2rem .7rem; border-bottom: 1px solid var(--eng-line); }
.eng-filters h2 { display: flex; align-items: center; gap: .6rem; margin: 0 0 .8rem; font-size: 1rem; }
.eng-total { color: var(--eng-accent); background: var(--eng-tint); padding: 0 .5rem; border-radius: 4px; font-size: .8rem; }
.eng-filters label:not(.eng-sr-only) { display: block; color: var(--eng-muted); font-size: .75rem; margin-bottom: .35rem; }
.eng-filters input, .eng-filters select { display: block; width: 100%; padding: .6rem .65rem; font-size: 16px; }
.eng-filters select { margin-top: .6rem; }
.eng-filter-status { display: flex; justify-content: space-between; align-items: center; gap: .5rem; min-height: 2.5rem; }
.eng-filter-status p { margin: .4rem 0 0; font-size: .73rem; color: var(--eng-muted); }
.eng-filter-status button { margin-top: .3rem; padding: .25rem .35rem; font-size: .73rem; }
.eng-list-pane { min-height: 0; }
#eng-list { list-style: none; padding: 0; margin: 0; }
.eng-lesson-link { display: block; padding: .9rem 1.15rem .95rem; border-left: 3px solid transparent; border-bottom: 1px solid var(--eng-line); text-decoration: none; }
.eng-lesson-link:hover { background: rgba(0, 0, 0, .025); color: inherit; }
.eng-lesson-link[aria-current="page"] { border-left-color: var(--eng-accent); background: var(--eng-tint); }
.eng-lesson-link[aria-current="page"] .eng-list-title { color: var(--eng-accent); }
.eng-list-meta { display: flex; align-items: baseline; gap: .55rem; margin-bottom: .3rem; color: var(--eng-muted); font-size: .68rem; line-height: 1.5; }
.eng-id { font: 600 .8rem/1.6 "Menlo", "Meslo LG", monospace; color: var(--eng-accent); flex-shrink: 0; }
.eng-list-title { display: block; font-size: .9rem; line-height: 1.55; font-weight: 600; }
.eng-list-story { display: block; margin-top: .3rem; color: var(--eng-muted); font-size: .76rem; line-height: 1.5; }
.eng-sidebar-note { margin: 0; border-top: 1px solid var(--eng-line); padding: .65rem 1.2rem; font-size: .67rem; color: var(--eng-muted); }
.eng-empty { margin: 1.2rem; font-size: .9rem; }
.eng-reading-pane { min-width: 0; }
.eng-reading-tools { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 60px; padding: .5rem 2rem; border-bottom: 1px solid var(--eng-line); background: var(--eng-bg); font-size: .75rem; color: var(--eng-muted); }
#eng-show-list { display: none; min-height: 44px; }
.eng-stepper { display: inline-flex; align-items: center; gap: .55rem; flex-shrink: 0; }
.eng-stepper a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; text-decoration: none; border: 1px solid var(--eng-line); border-radius: 4px; }
.eng-stepper a[aria-disabled="true"] { opacity: .35; pointer-events: none; }
.eng-lessons { max-width: 1000px; margin: 0 auto; padding: 2rem clamp(1.3rem, 3vw, 3.5rem) 4rem; }
.eng-lesson { overflow-wrap: anywhere; scroll-margin-top: 5rem; }
.eng-lesson + .eng-lesson { margin-top: 4rem; }
.eng-ready .eng-lesson { margin-top: 0; }
.eng-lesson-meta { display: flex; flex-wrap: wrap; align-items: baseline; gap: .75rem; font-size: .8rem; color: var(--eng-muted); }
.eng-lesson h1 { font-size: clamp(1.5rem, 2.3vw, 2.2rem); line-height: 1.35; letter-spacing: -.025em; margin: .75rem 0 1.8rem; font-weight: 700; }
.eng-lesson h2 { margin: 0 0 1rem; font-size: 1.25rem; line-height: 1.5; }
.eng-lesson p { margin: 0 0 1.2rem; color: #363737; font-size: 19px; line-height: 1.8; }
.eng-lesson strong { font-weight: 700; }
.eng-story { margin-bottom: 2.25rem; padding: 1.25rem 1.4rem; border: 1px solid var(--eng-line); border-radius: 6px; background: #fff; }
.eng-story .eng-section-label { margin-bottom: .45rem; color: var(--eng-accent); font-size: .75rem; font-weight: 600; }
.eng-story p { font-size: 17px; line-height: 1.8; }
.eng-story p:last-child { margin-bottom: 0; }
.eng-dialogue h2 { color: var(--eng-accent); }
.eng-dialogue .eng-turn { padding: 1rem 1.2rem; border-left: 3px solid var(--eng-line); }
.eng-dialogue .eng-turn-self { border-left-color: var(--eng-accent); background: var(--eng-tint); border-radius: 0 5px 5px 0; }
.eng-speaker { display: block; margin-bottom: .4rem; color: var(--eng-muted); font-size: .8rem; font-weight: 600; }
.eng-dialogue strong { color: #9e2033; }
.eng-lesson .eng-reading-note { margin: 2rem 0 0; padding-top: 1rem; border-top: 1px solid var(--eng-line); color: var(--eng-muted); font-size: .75rem; }
.eng-noscript { padding: .8rem 1.5rem; background: var(--eng-tint); }
.eng-ready { height: calc(100vh - 2px); height: calc(100dvh - 2px); display: flex; flex-direction: column; overflow: hidden; }
.eng-ready .eng-topbar { flex-shrink: 0; }
.eng-ready .eng-workspace { flex: 1; min-height: 0; }
.eng-ready .eng-sidebar { display: flex; flex-direction: column; min-height: 0; }
.eng-ready .eng-filters, .eng-ready .eng-sidebar-note { flex-shrink: 0; }
.eng-ready .eng-list-pane { overflow-y: auto; flex: 1; }
.eng-ready .eng-reading-pane { overflow-y: auto; }

@media (max-width: 1050px) {
  .eng-workspace { grid-template-columns: 300px minmax(0, 1fr); }
  .eng-brand span { display: none; }
  .eng-reading-tools { padding-left: 1.3rem; padding-right: 1.3rem; }
}

@media (max-width: 760px) {
  .eng-topbar { min-height: 65px; padding: .75rem 1rem; }
  .eng-topbar nav { gap: .8rem; font-size: .8rem; }
  .eng-workspace { grid-template-columns: minmax(0, 1fr); }
  .eng-sidebar { border-right: 0; }
  .eng-ready .eng-sidebar { display: none; }
  .eng-ready.eng-list-open .eng-sidebar { display: flex; }
  .eng-ready.eng-list-open .eng-reading-pane { display: none; }
  .eng-reading-tools { padding: .5rem 1rem; gap: .5rem; }
  #eng-show-list { display: inline-block; flex-shrink: 0; }
  #eng-current-group { display: none; }
  .eng-lessons { padding: 1.4rem 1rem 3rem; }
  .eng-lesson h1 { margin-bottom: 1.4rem; }
  .eng-lesson h2 { font-size: 1.15rem; }
  .eng-story { padding: 1rem; }
  .eng-dialogue .eng-turn { padding: .85rem 1rem; }
  .eng-lesson p { font-size: 17px; }
  .eng-story .eng-section-label, .eng-lesson .eng-reading-note { font-size: .75rem; }
}

@media print {
  html { height: auto; border: 0; }
  body.eng-ready { display: block; height: auto; overflow: visible; }
  .eng-topbar, .eng-sidebar, .eng-reading-tools, .eng-skip { display: none !important; }
  .eng-workspace { display: block; }
  .eng-ready .eng-reading-pane { overflow: visible; }
  .eng-lessons { padding: 0; max-width: none; }
  .eng-story { break-inside: avoid; }
  .eng-dialogue .eng-turn { break-inside: avoid; }
}