/* Demo code: MIT. Codex and areoform. */
:root {
  color-scheme:light;
  --reading-size:20px;
  --ink:#272e2b;
  --quiet:#68716b;
  --accent:#246e5b;
  background:#fcfcfa;
  color:var(--ink);
  font:16px/1.5 system-ui,sans-serif;
}

* {
  box-sizing:border-box;
}

body {
  margin:0;
  padding:0 24px 60px;
}

a {
  color:var(--accent);
  text-underline-offset:.2em;
}

button,select {
  font:inherit;
}

button,a,select {
  -webkit-tap-highlight-color:transparent;
}

:focus-visible {
  outline:3px solid #348c75;
  outline-offset:5px;
}

.masthead {
  max-width:740px;
  margin:76px auto 28px;
}

.project {
  font-size:14px;
  text-decoration:none;
  color:var(--quiet);
}

h1 {
  font:400 clamp(42px,6.7vw,74px)/1.08 Georgia,'Times New Roman',serif;
  letter-spacing:-.045em;
  margin:32px 0 24px;
}

.byline {
  color:var(--quiet);
  font-size:15px;
  display:flex;
  gap:12px;
  margin:0;
}

.sections {
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:9px;
  margin-top:32px;
  font-size:14px;
}

.sections span {
  color:var(--quiet);
  margin-right:8px;
}

.sections a {
  display:grid;
  place-items:center;
  min-width:32px;
  min-height:36px;
  text-decoration:none;
  border-radius:50%;
}

.sections a:hover {
  background:#eaf0e8;
}

/* The example owns a usable pane even if the shared stylesheet never arrives. */
.reading-bar {
  --fg-radius: 25px;
  --pane-tint: .55;
  position: sticky;
  z-index: 10;
  top: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  width: 700px;
  max-width: 100%;
  min-height: 72px;
  margin: 34px auto 52px;
  padding: 12px 16px;
  color: #243d35;
  border: 1px solid #348c7599;
  border-radius: 25px;
  box-shadow: inset 0 1px 0 #fff, inset 0 -1px 2px #3c6b4f26, 0 8px 24px #243d3521;
  isolation: isolate;
}

/* Tint is independent of the optics. A visible edge and body survive every tier. */
.reading-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  border-radius: inherit;
  background: rgba(232, 243, 239, var(--pane-tint));
  box-shadow: inset 0 1px 0 #ffffffdc, inset 0 -1px 1px #315f4726;
}

/* Shared CSS advertises that its material rules are available. */
.reading-bar:not([data-glass-ready]) {
  background: #f0f5f2;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

/* These tiers also work without glass.js or the shared glass stylesheet. */
.reading-bar:not([data-glass-ready])[data-fallback-material=translucent] {
  background: linear-gradient(145deg, #fffffff2, #ecf4efeb);
}
@supports ((backdrop-filter:blur(5px)) or (-webkit-backdrop-filter:blur(5px))) {
  .reading-bar:not([data-glass-ready])[data-fallback-material=frosted] {
    background: linear-gradient(145deg, #ffffff94, #e5efea99);
    -webkit-backdrop-filter: blur(var(--local-blur, 14px)) saturate(.8);
    backdrop-filter: blur(var(--local-blur, 14px)) saturate(.8);
  }
}
.bar-navigation, .size-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.size-controls {
  border-left: 1px solid #5a7d6e35;
  padding-left: 12px;
}

.reading-button {
  --fg-etch-radius: 11px;
  --fg-etch-width: 2px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: none;
  padding: 0;
  border: 1px solid #5a7d6e3d;
  border-radius: 11px;
  background: #ffffff85;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  box-shadow: inset 0 1px 1px #fff, 0 1px 2px #25433412;
}

.reading-button.fg-etch { box-shadow: inset 0 2px 3px #193e3626, inset 0 -1px 1px #fff; }
.reading-button:hover { background-color: #ffffffcf; }
.reading-button:disabled { opacity: .38; cursor: default; }
.top-link { font-size: 23px; }
.finish-control {
  display: flex;
  flex: 1;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 13px;
  color: #456453;
}
.finish-select {
  position: relative;
  display: block;
  flex: 0 1 180px;
  width: 180px;
  min-width: 0;
  max-width: 100%;
  color: var(--ink);
}
.finish-control select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 42px;
  padding: 6px 10px;
  border: 1px solid #5a7d6e3d;
  border-radius: 11px;
  background: #ffffffb3;
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}
/* Reserve room around the drawn chevron, not just its layout box. */
@supports ((appearance:none) or (-webkit-appearance:none)) {
  .finish-control select {
    -webkit-appearance: none;
    appearance: none;
    padding-inline-start: 12px;
    padding-inline-end: 44px;
  }
  .finish-select::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    inset-inline-end: 17px;
    top: 50%;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
  }
}
.reading-progress {
  min-width: 38px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: #52685b;
}
.glass-settings { flex: none; }
.settings-toggle { list-style: none; font-size: 23px; }
.settings-toggle::-webkit-details-marker { display: none; }
.glass-settings[open] .settings-toggle { background: #d5e9df; }
.settings-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  width: 360px;
  max-width: 100%;
  max-height: var(--settings-height, calc(100dvh - 124px));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 24px;
  border: 1px solid #c7d5cb;
  border-radius: 20px;
  background: #fafcf9;
  color: var(--ink);
  box-shadow: 0 16px 40px #243d3526;
  font-size: 13px;
}
.glass-settings[data-placement=above] .settings-panel { top: auto; bottom: calc(100% + 12px); }
.panel-heading { display: flex; justify-content: space-between; align-items: center; }
.panel-heading h2 { margin: 0; font: 24px/1.2 Georgia, serif; }
.reset-button { border: 0; background: transparent; color: var(--accent); padding: 6px; cursor: pointer; }
.panel-note, .panel-footnote { color: var(--quiet); line-height: 1.5; }
.panel-note { margin: 10px 0 18px; }
.setting-row { display: grid; grid-template-columns: 85px minmax(0,1fr) 34px; align-items: center; gap: 8px; margin: 16px 0; }
.setting-row input { width: 100%; margin: 0; accent-color: #348c75; }
.setting-row output { text-align: right; font-variant-numeric: tabular-nums; color: var(--quiet); font-size: 12px; }
.etch-toggle { display: flex; align-items: center; gap: 8px; margin: 18px 0; }
.etch-toggle input { accent-color: #348c75; }
.finish-status { border-top: 1px solid #dce4dc; padding-top: 14px; margin: 0; color: #456453; }
.panel-footnote { font-size: 11px; margin: 8px 0 0; }
.settings-panel :disabled { opacity: .45; cursor: default; }

.essay {
  max-width:640px;
  margin:0 auto;
  font:400 var(--reading-size)/1.75 Georgia,'Times New Roman',serif;
}

.essay p {
  margin:0 0 1.3em;
  overflow-wrap:break-word;
}

.essay h2 {
  font:400 26px/1.2 Georgia,serif;
  text-align:center;
  color:#526558;
  margin:2.6em 0 1.5em;
  scroll-margin-top:var(--reading-clearance,110px);
}

.essay h2::before {
  content:'';
  display:block;
  width:24px;
  height:1px;
  background:#c9d5cc;
  margin:0 auto 22px;
}

.colophon {
  max-width:640px;
  margin:86px auto 0;
  border-top:1px solid #dce2dc;
  padding-top:28px;
  color:var(--quiet);
  font-size:13px;
  line-height:1.7;
}

.colophon p {
  margin:0 0 12px;
}

.colophon p:nth-child(2) {
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.skip-link {
  position:fixed;
  top:10px;
  left:12px;
  transform:translateY(-180%);
  z-index:30;
  background:white;
  padding:10px 16px;
  border:1px solid #246e5b;
  border-radius:8px;
}

.skip-link:focus {
  transform:none;
}

.visually-hidden {
  position:absolute!important;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

@media (max-width:600px) {
  body { padding: 0 18px 42px; }
  .masthead { margin-top: 42px; }
  h1 { max-width: 330px; font-size: 52px; }
  .sections { gap: 3px; }
  .sections span { width: 100%; margin-bottom: 5px; }
  :root { --reading-clearance: 154px; }
  .reading-bar { display: grid; grid-template-columns: minmax(0,1fr) auto; top: 10px; gap: 10px; padding: 10px 12px; min-height: 64px; margin-top: 28px; margin-bottom: 36px; border-radius: 22px; --fg-radius: 22px; }
  .reading-button { width: 38px; height: 40px; }
  .bar-navigation, .size-controls { gap: 7px; }
  .size-controls { padding-left: 9px; }
  .finish-control { grid-column: 1; grid-row: 1; justify-content: start; gap: 8px; }
  .finish-select { flex: 1; width: 100%; }
  .finish-control select { min-height: 40px; }
  .glass-settings { grid-column: 2; grid-row: 1; }
  .bar-navigation { grid-column: 1; grid-row: 2; }
  .reading-progress { grid-column: 2; grid-row: 2; align-self: center; }
  .settings-panel { padding: 20px; }
  .essay { font-size: calc(var(--reading-size) - 1px); line-height: 1.72; }
  .colophon { margin-top: 60px; }
}
@media (max-width:360px) {
  /* The descriptive finish name stays visible; its label remains accessible. */
  .finish-control > span:first-child {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
  }
}
@media (prefers-reduced-transparency:reduce), (prefers-contrast:more) {
  .reading-bar:not([data-fg-preference]), .reading-bar[data-fg-preference=auto] {
    background: #f0f5f2 !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
}
@media (forced-colors:active) {
  :root { background: Canvas; color: CanvasText; }
  .reading-bar, .reading-button, .settings-panel, #surface {
    color: CanvasText;
    background: Canvas !important;
    border: 1px solid CanvasText;
    box-shadow: none;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
  .reading-bar::after, .reading-button::before, .finish-select::after { display: none; }
  .finish-control select { -webkit-appearance: auto; appearance: auto; padding-inline-end: 12px; }
  .reading-progress, .finish-status, .colophon { color: CanvasText; }
  .essay h2::before { background: CanvasText; }
}
@media print {
  body {
    padding:0;
    background:white;
    color:black;
  }
  .masthead {
    margin:0 auto 2rem;
  }
  .project,.sections,.reading-bar,.skip-link {
    display:none;
  }
  .essay {
    font-size:11pt;
    line-height:1.5;
    max-width:none;
  }
  .essay h2 {
    break-after:avoid;
  }
  .essay p {
    orphans:3;
    widows:3;
  }
  .colophon {
    max-width:none;
    font-size:9pt;
  }
}