/* Berlin monochrome foundation; derived from the locally adopted SiYuan palette. */
:root {
  color-scheme:dark;
  --background:#000000;
  --surface:#0e0e0e;
  --selected:#181818;
  --border:#333333;
  --text:#cccccc;
  --muted:#aaaaaa;
  --strong:#ffffff;
  --reading-size:20px;
  --reading-width:730px;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--background);
  color:var(--text)
}
* {
  box-sizing:border-box
}
html {
  scroll-behavior:smooth;
  scroll-padding-top:36px
}
body {
  margin:0
}
a {
  color:inherit;
  text-decoration:none
}
button {
  font:inherit;
  color:inherit
}
button,a {
  touch-action:manipulation
}
a:focus-visible,button:focus-visible {
  outline:2px solid var(--strong);
  outline-offset:5px
}
::selection {
  color:#fff;
  background:#333
}
button {
  cursor:pointer
}
button:disabled {
  opacity:.4;
  cursor:default
}
.skip-link {
  position:fixed;
  top:-70px;
  left:20px;
  padding:12px;
  background:#fff;
  color:#000;
  z-index:10
}
.skip-link:focus {
  top:12px
}
.site-header {
  min-height:100px;
  max-width:1480px;
  margin:auto;
  padding:0 64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid var(--selected);
  gap:24px
}
.wordmark {
  display:flex;
  align-items:center;
  gap:14px;
  color:var(--strong);
  font-size:16px;
  font-weight:550;
  letter-spacing:-.02em
}
.wordmark-icon {
  font-size:29px;
  font-weight:300;
  transform:rotate(90deg)
}
.edition {
  border-left:1px solid var(--border);
  margin-left:10px;
  padding-left:24px;
  font-weight:400;
  color:var(--muted);
  font-size:13px;
  letter-spacing:0
}
.theme-name {
  font-size:12px;
  color:var(--muted);
  display:flex;
  align-items:center;
  gap:12px
}
.theme-dot {
  width:8px;
  height:8px;
  border:1px solid #ccc;
  border-radius:50%
}
.site-shell {
  display:grid;
  grid-template-columns:208px minmax(0,880px);
  gap:80px;
  max-width:1320px;
  margin:0 auto;
  padding:54px 48px 0
}
.rail {
  position:sticky;
  top:36px;
  align-self:start
}
.all-lessons {
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:13px;
  margin:0 0 52px;
  color:var(--strong);
  min-height:32px
}
.rail-label,.eyebrow,.small-label,.card-category,.nav-caption {
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  font-weight:500;
  color:var(--muted)
}
.rail-label {
  margin-bottom:16px
}
.lesson-link {
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:15px 10px;
  margin:0 -10px;
  border-left:1px solid var(--border);
  font-size:13px;
  line-height:1.6
}
.lesson-link:hover {
  background:var(--surface);
  color:var(--strong)
}
.lesson-link.current {
  border-color:var(--strong);
  background:var(--surface);
  color:var(--strong)
}
.lesson-number {
  font-size:11px;
  padding-top:2px;
  color:var(--muted);
  font-variant-numeric:tabular-nums
}
.outline {
  margin-top:44px
}
.outline nav {
  display:grid;
  gap:2px
}
.outline a {
  font-size:12px;
  padding:7px 0;
  color:var(--muted);
  line-height:1.5
}
.outline a:hover {
  color:#fff
}
.rail-note {
  margin-top:56px;
  font-size:12px;
  line-height:1.9;
  color:var(--muted)
}
main {
  min-width:0;
  outline:0
}
.collection-intro {
  padding:16px 0 64px
}
.eyebrow {
  margin:0 0 28px
}
.collection-intro h1 {
  font-size:clamp(60px,7vw,100px);
  font-weight:450;
  line-height:1.02;
  letter-spacing:-.065em;
  margin:0 0 38px;
  color:var(--strong)
}
.collection-intro h1 span {
  color:var(--muted)
}
.lead {
  font-size:24px;
  line-height:1.5;
  letter-spacing:-.02em;
  margin-bottom:22px
}
.intro-note {
  font-size:15px;
  line-height:1.85;
  max-width:530px;
  color:var(--muted);
  margin:0
}
.collection-heading {
  border-bottom:1px solid var(--border);
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-bottom:20px;
  gap:16px
}
.collection-heading h2 {
  font-size:14px;
  font-weight:450;
  margin:0;
  color:#fff
}
.collection-heading>span {
  font-size:11px;
  color:var(--muted)
}
.reading-card {
  display:grid;
  grid-template-columns:36px 1fr 24px;
  gap:24px;
  padding:34px 8px 34px 0;
  border-bottom:1px solid var(--border);
  transition:background .15s
}
.reading-card:hover {
  background:var(--surface)
}
.card-index {
  font-size:12px;
  color:var(--muted);
  padding-top:2px
}
.card-category {
  margin:0 0 15px
}
.reading-card h3 {
  font-size:clamp(22px,2.1vw,29px);
  font-weight:450;
  line-height:1.35;
  letter-spacing:-.035em;
  color:#fff;
  max-width:600px;
  margin:0 0 13px
}
.card-description {
  font-size:14px;
  line-height:1.7;
  margin:0 0 20px;
  color:var(--muted)
}
.card-meta {
  font-size:11px;
  display:flex;
  gap:12px;
  color:var(--muted)
}
.card-arrow {
  font-size:23px;
  font-weight:300;
  color:var(--muted);
  padding-top:30px
}
.reading-card:hover .card-arrow {
  color:#fff
}
.collection-note {
  display:flex;
  gap:20px;
  max-width:590px;
  margin:38px 0 70px;
  font-size:13px;
  line-height:1.9;
  color:var(--muted)
}
.collection-note p {
  margin:0
}
.note-mark {
  font-size:23px
}
.site-footer {
  border-top:1px solid var(--selected);
  padding:25px 0 32px;
  display:flex;
  justify-content:space-between;
  gap:20px;
  font-size:11px;
  color:var(--muted);
  margin-top:64px
}
.reading-top {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:44px;
  margin-bottom:44px
}
.back-link {
  font-size:12px;
  color:var(--muted)
}
.back-link:hover {
  color:#fff
}
.reading-tools {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px
}
.reading-tools button {
  min-height:44px;
  min-width:40px;
  font-size:12px;
  border:0;
  background:transparent;
  border-radius:3px;
  padding:8px
}
.reading-tools button:hover,.reading-tools button[aria-pressed=true] {
  background:var(--selected);
  color:#fff
}
.tool-separator {
  height:16px;
  width:1px;
  background:var(--border);
  margin:0 8px
}
kbd {
  font:12px inherit;
  padding-left:7px;
  color:var(--muted)
}
.reading-header {
  padding-bottom:44px;
  border-bottom:1px solid var(--border)
}
.reading-header .eyebrow {
  margin-bottom:24px
}
.reading-header h1 {
  font-size:clamp(32px,4vw,52px);
  line-height:1.13;
  letter-spacing:-.05em;
  font-weight:450;
  color:#fff;
  max-width:790px;
  margin:0 0 24px
}
.reading-deck {
  font-size:17px;
  line-height:1.75;
  color:var(--muted);
  max-width:640px;
  margin:0 0 28px
}
.reading-meta {
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  font-size:11px;
  color:var(--muted)
}
.reading-meta a {
  border-bottom:1px solid #555;
  padding-bottom:3px
}
.reading-meta a:hover {
  color:#fff
}
.reading-section {
  margin-top:64px
}
.section-heading {
  display:flex;
  align-items:center;
  gap:18px;
  margin:0 0 34px
}
.section-number {
  font-size:11px;
  color:var(--muted)
}
h2 {
  font-size:24px;
  font-weight:450;
  letter-spacing:-.035em;
  color:#fff;
  margin:0
}
.target-list {
  list-style:none;
  padding:0;
  margin:0
}
.target-list li {
  display:grid;
  grid-template-columns:205px 1fr;
  gap:24px;
  padding:19px 0;
  border-top:1px solid var(--selected);
  font-size:16px;
  line-height:1.75
}
.target-list li:last-child {
  border-bottom:1px solid var(--selected)
}
.target-list strong {
  font-weight:500;
  color:#fff
}
.target-list span {
  color:var(--text)
}
.prose,.dialogue,.scene-context,.scene-briefs .study-text {
  font-size:var(--reading-size);
  line-height:1.9;
  letter-spacing:-.012em;
  max-width:var(--reading-width)
}
.prose p {
  margin:0 0 28px
}
.prose p:first-child {
  font-size:calc(var(--reading-size) + 1px);
  color:#eee;
  line-height:1.8
}
.scene-briefs {
  display:grid;
  gap:32px
}
.scene-briefs article {
  padding:0 0 30px;
  border-bottom:1px solid var(--selected)
}
.small-label {
  margin:0 0 12px
}
.scene-briefs h3,.conversation h3 {
  font-size:24px;
  font-weight:450;
  letter-spacing:-.035em;
  line-height:1.4;
  color:#fff;
  margin:0 0 15px
}
.scene-briefs .study-text {
  font-size:calc(var(--reading-size) - 2px);
  margin:0 0 17px;
  line-height:1.85
}
.text-link {
  font-size:12px;
  color:var(--muted);
  display:inline-block;
  padding:6px 0
}
.text-link:hover {
  color:#fff
}
.section-intro {
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  max-width:550px;
  margin:-13px 0 42px
}
.conversation {
  margin-top:46px;
  padding-bottom:46px;
  border-bottom:1px solid var(--border);
  scroll-margin-top:32px
}
.conversation-heading {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:25px;
  margin-bottom:30px
}
.conversation-heading h3 {
  margin:0
}
.scene-link {
  font-size:11px;
  white-space:nowrap;
  color:var(--muted);
  border-bottom:1px solid #555;
  padding-bottom:4px
}
.scene-link:hover {
  color:#fff
}
.turn {
  margin:0 0 26px
}
.turn:last-child {
  margin-bottom:0
}
.speaker {
  display:block;
  margin-bottom:5px;
  color:var(--muted);
  font-size:12px;
  line-height:1.5;
  font-weight:400;
  white-space:nowrap
}
/* Preserve selectable source text, even when labels are visually concealed. */
.speakers-hidden .speaker,.speakers-hidden .speaker * {
  color:transparent
}
.speakers-hidden .speaker::selection,.speakers-hidden .speaker *::selection {
  color:transparent
}
.tts-marker {
  font-size:10px;
  font-weight:400;
  font-family:ui-monospace,SFMono-Regular,monospace;
  color:#aaa;
  letter-spacing:-.03em
}
.scene-header {
  border:0;
  padding-bottom:24px
}
.scene-header .scene-context {
  font-size:calc(var(--reading-size) - 2px);
  color:var(--muted);
  margin:32px 0 0
}
.reading-nav {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:30px;
  padding-top:36px;
  margin:60px 0 0;
  border-top:1px solid var(--border)
}
.reading-nav a {
  display:flex;
  flex-direction:column;
  gap:12px;
  align-items:flex-start;
  padding:8px 0
}
.reading-nav strong {
  font-size:15px;
  font-weight:450;
  color:#eee;
  line-height:1.6
}
.reading-nav a:hover strong {
  color:#fff;
  text-decoration:underline;
  text-underline-offset:5px
}
.reading-nav .next {
  align-items:flex-end;
  text-align:right
}
.masked .study-text,.masked .study-text * {
  color:transparent!important;
  text-shadow:none!important
}
.masked .study-text::selection,.masked .study-text *::selection {
  color:transparent;
  background:#333
}
.sr-only {
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
  border:0
}
@media(min-width:1450px) {
  :root {
    --reading-width:1040px
  }
  .site-header {
    max-width:1888px
  }
  .site-shell {
    grid-template-columns:224px minmax(0,1fr);
    max-width:1760px;
    gap:88px;
    padding-left:48px;
    padding-right:48px
  }
}
@media(max-width:1050px) {
  .site-header {
    padding:0 32px
  }
  .site-shell {
    grid-template-columns:176px minmax(0,1fr);
    gap:40px;
    padding:40px 32px 0
  }
  .target-list li {
    grid-template-columns:165px 1fr;
    gap:18px
  }
  .tts-marker {
    font-size:9px
  }
  .conversation-heading {
    align-items:flex-start
  }
  .scene-link {
    margin-top:22px
  }
}
@media(max-width:760px) {
  .site-header {
    min-height:76px;
    padding:0 22px
  }
  .edition {
    display:none
  }
  .wordmark {
    font-size:14px;
    gap:10px
  }
  .wordmark-icon {
    font-size:25px
  }
  .theme-name {
    font-size:10px;
    gap:8px
  }
  .site-shell {
    display:block;
    padding:28px 22px 0
  }
  .rail {
    position:static;
    margin-bottom:44px
  }
  .rail .all-lessons,.rail-label,.outline,.rail-note {
    display:none
  }
  .rail>nav {
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:8px;
    border-bottom:1px solid var(--border);
    padding-bottom:12px
  }
  .lesson-link {
    display:block;
    min-width:0;
    font-size:11px;
    line-height:1.55;
    padding:10px;
    margin:0;
    border:1px solid var(--border)
  }
  .lesson-number {
    display:block;
    font-size:10px;
    margin-bottom:5px
  }
  .collection-intro {
    padding:0 0 44px
  }
  .collection-intro h1 {
    font-size:64px;
    margin-bottom:26px
  }
  .eyebrow {
    font-size:10px;
    margin-bottom:23px
  }
  .lead {
    font-size:21px
  }
  .intro-note {
    font-size:14px
  }
  .reading-card {
    grid-template-columns:22px 1fr 17px;
    gap:14px;
    padding:28px 0
  }
  .reading-card h3 {
    font-size:25px
  }
  .card-category {
    font-size:10px
  }
  .card-description {
    font-size:13px
  }
  .card-arrow {
    font-size:20px
  }
  .collection-note {
    margin-bottom:45px
  }
  .reading-top {
    margin-bottom:30px;
    gap:10px;
    align-items:center
  }
  .reading-tools button {
    font-size:11px;
    padding:5px;
    min-width:33px
  }
  .tool-separator {
    margin:0 4px
  }
  .back-link {
    font-size:11px
  }
  .reading-header h1 {
    font-size:37px
  }
  .reading-deck {
    font-size:16px
  }
  .reading-header {
    padding-bottom:32px
  }
  .reading-section {
    margin-top:44px
  }
  .section-heading {
    margin-bottom:26px
  }
  h2 {
    font-size:23px
  }
  .target-list li {
    display:block;
    font-size:16px;
    padding:16px 0
  }
  .target-list strong {
    display:block;
    margin-bottom:6px
  }
  .prose,.dialogue {
    font-size:var(--reading-size);
    line-height:1.85
  }
  .scene-briefs h3,.conversation h3 {
    font-size:23px
  }
  .conversation-heading {
    display:block
  }
  .scene-link {
    display:inline-block;
    margin:14px 0 0
  }
  .speaker {
    white-space:normal
  }
  .tts-marker {
    font-size:9px
  }
  .turn {
    margin-bottom:25px
  }
  .reading-nav {
    gap:20px
  }
  .reading-nav strong {
    font-size:13px
  }
  .nav-caption {
    font-size:9px
  }
  .site-footer {
    font-size:10px;
    line-height:1.7;
    margin-top:42px
  }
  .scene-header {
    padding-bottom:20px
  }
  .scene-context {
    font-size:18px
  }
  .collection-heading h2 {
    font-size:13px
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }
  * {
    transition:none!important
  }
}