:root {
  color-scheme: light;
  font-family: system-ui, sans-serif;
  color: #28231d;
  background: #f5efe4;
  --paper: #fffcf5;
  --ink: #28231d;
  --subtle: #66594c;
  --line: #dfd3c1;
  --rust: #843e2e;
  --rust-soft: #f3e2d7;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
button, input { font: inherit; }
button, summary { cursor: pointer; }
button:disabled { cursor: default; }
:focus-visible { outline: 2px solid var(--rust); outline-offset: 3px; }
.shell { width: min(1280px, calc(100% - 64px)); margin: 0 auto; }
.masthead { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; padding: 36px 0 24px; border-bottom: 1px solid var(--line); margin-bottom: 25px; }
.eyebrow { margin: 0; color: var(--rust); font-size: .75rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 5px 0 3px; font: 500 clamp(2.65rem, 5vw, 4.15rem)/1.08 Georgia, serif; letter-spacing: -.045em; }
.credit { color: var(--subtle); font-size: .9rem; margin: 10px 0 0; }
.catalog-size { display: flex; gap: 15px; font-size: .83rem; white-space: nowrap; color: var(--subtle); }
.catalog-size span + span { border-left: 1px solid var(--line); padding-left: 15px; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, 275px); align-items: start; gap: 24px; }
.slide-meta { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 2px 2px 12px; }
#slide-position { color: var(--subtle); white-space: nowrap; font-size: .84rem; font-variant-numeric: tabular-nums; }
.slide-frame { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; background: #f1eee4; }
.slide-frame img { display: block; width: 100%; height: auto; }
.navigation { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 13px 0 20px; }
.navigation button, .navigation input { border: 1px solid var(--line); border-radius: 7px; background: var(--paper); color: var(--ink); padding: 8px 12px; min-height: 41px; }
.navigation button:hover:enabled { border-color: var(--rust); color: var(--rust); }
.navigation button:disabled { background: transparent; color: #857a6e; }
.navigation #next:enabled { background: var(--rust); border-color: var(--rust); color: white; }
.navigation #next:enabled:hover { background: #6f3124; }
#jump { display: flex; gap: 4px; }
#jump input { width: 55px; padding: 6px; text-align: center; appearance: textfield; }
#jump input::-webkit-inner-spin-button { appearance: none; }
#jump button { padding-inline: 8px; }
.contents, .listening { background: var(--paper); border: 1px solid var(--line); border-radius: 9px; }
.contents details { padding: 16px 12px 12px; }
.contents summary { font: 600 1.22rem Georgia, serif; margin: 0 4px 10px; }
.contents details:not([open]) summary { margin-bottom: 4px; }
#chapters { display: grid; gap: 2px; }
#chapters a { display: grid; grid-template-columns: 24px 1fr; gap: 7px; padding: 8px 7px; border-radius: 5px; color: var(--ink); text-decoration: none; font-size: .85rem; line-height: 1.25; }
#chapters a:hover { background: #f7eee0; }
#chapters a[aria-current] { background: var(--rust-soft); color: #6f3124; font-weight: 690; }
.chapter-number { color: var(--rust); font-size: .75rem; font-variant-numeric: tabular-nums; }
.listening { padding: 17px; }
.section-heading { display: flex; align-items: center; gap: 11px; }
.music-mark { display: grid; place-items: center; width: 35px; height: 35px; flex: 0 0 35px; border-radius: 50%; color: var(--rust); background: var(--rust-soft); font-size: 1.05rem; }
.section-heading h2 { margin: 0; font: 600 1.38rem Georgia, serif; }
.section-heading p { margin: 4px 0 0; color: var(--subtle); font-size: .85rem; }
.player { background: #f5eee2; border-radius: 8px; padding: 10px 12px; margin-top: 14px; }
.player p { font-size: .88rem; font-weight: 650; margin: 0 0 7px; overflow-wrap: anywhere; }
audio { display: block; width: 100%; height: 42px; }
.playback-status { margin: 10px 0 0; color: var(--rust); font-size: .85rem; }
.track-list { list-style: none; padding: 0; margin: 11px 0 0; }
.track-list li + li { border-top: 1px solid var(--line); }
.track-list button { display: flex; width: 100%; align-items: baseline; gap: 10px; padding: 9px 4px; color: var(--ink); background: transparent; border: 0; text-align: left; overflow-wrap: anywhere; font-size: .9rem; }
.track-list button:hover, .track-list button[aria-pressed="true"] { color: var(--rust); }
.track-icon { color: var(--rust); flex: 0 0 13px; font-size: .73rem; }
#chapter-tracks { margin-top: 12px; color: var(--subtle); font-size: .86rem; }
#chapter-tracks summary { width: fit-content; padding: 4px 0; }
footer { margin: 25px 0; font-size: .82rem; }
footer a { color: var(--subtle); text-underline-offset: .18em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media (max-width: 820px) {
  .shell { width: min(100% - 32px, 680px); }
  .layout { display: flex; flex-direction: column; gap: 14px; }
  .viewer, .contents { width: 100%; }
  .contents { order: -1; }
  #chapters { grid-template-columns: 1fr 1fr; }
  .masthead { margin-bottom: 14px; padding-top: 24px; padding-bottom: 17px; }
}
@media (max-width: 490px) {
  .masthead { display: block; }
  .catalog-size { display: none; }
  #chapters { grid-template-columns: 1fr; }
}