:root {
  --paper: #f8f6f0;
  --ink: #28231f;
  --dim: #514b44;
  --line: #d9d4ca;
  --rust: #a84c24;
  --desktop: #242621;
  --panel: #1b1d1a;
  --chrome: #d0cec4;
  --chrome-line: #3d4038;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --serif: "Iowan Old Style", Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { background: var(--desktop); scroll-padding-top: 5rem; }
body { margin: 0; color: var(--ink); font-family: var(--serif); font-size: 19px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--rust); text-decoration-thickness: 1px; text-underline-offset: .19em; }
a:hover { text-decoration-thickness: 2px; }
button, select { font: inherit; }
button, select, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--rust); outline-offset: 4px; }
::selection { background: #e8d5c4; }
img { max-width: 100%; }
h1, h2, h3 { color: var(--ink); line-height: 1.15; font-weight: 400; text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 5.1vw, 4rem); letter-spacing: -.035em; margin: 0 0 1.4rem; }
h2 { font-size: clamp(1.65rem, 3vw, 2.15rem); letter-spacing: -.02em; margin: 3.2rem 0 1.25rem; }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1.35rem; }
button { cursor: pointer; }
button:disabled { cursor: default; color: #746d64; background: #ebe7de; }

.skip-link { position: absolute; left: 1rem; top: -8rem; z-index: 20; background: var(--paper); padding: .5rem 1rem; }
.skip-link:focus { top: .5rem; }
.system-bar { min-height: 33px; padding: .35rem 1.1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; background: var(--panel); border-bottom: 1px solid var(--chrome-line); color: var(--chrome); font: 12px/1.4 var(--mono); }
.system-bar a { color: var(--chrome); text-decoration: none; }
.system-bar a:hover { color: #e5a17d; }
.system-bar :focus-visible, .file-tree :focus-visible { outline-color: #e5a17d; }
.workstation { display: grid; grid-template-columns: 210px minmax(0, 1fr); max-width: 1600px; margin: 0 auto; min-height: calc(100vh - 68px); }
.file-tree { padding: 2rem 1.1rem; border-right: 1px solid var(--chrome-line); color: var(--chrome); font: 13px/1.7 var(--mono); }
.file-tree p { margin: 0 0 1rem; color: #b0b0a6; }
.file-tree a { display: block; padding: .65rem .4rem; color: var(--chrome); text-decoration: none; overflow-wrap: anywhere; }
.file-tree a[aria-current="page"] { color: #e5a17d; background: #2c2f28; }
.file-tree a:hover { background: #2c2f28; }
.document { min-width: 0; margin: 2rem clamp(1.25rem, 3.6vw, 4.5rem) 3rem; background: var(--paper); border: 1px solid var(--chrome-line); }
.document-tab { padding: .65rem 1.4rem; border-bottom: 1px solid var(--line); color: var(--dim); font: 12px/1.5 var(--mono); overflow-wrap: anywhere; }
.document-inner { max-width: 850px; margin: 0 auto; padding: 2.5rem clamp(1.2rem, 4vw, 4rem) 3.5rem; }
.preview-note { font: 12px/1.6 var(--mono); color: var(--dim); border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: 2rem; }
.meta, .document-links, figcaption, .contents, .article-return, .resource-links, .article-footer { font: 13px/1.65 var(--mono); }
.meta { color: var(--dim); margin: 0 0 .65rem; }
.document-links { margin-bottom: 2rem; }
.lead { font-size: 1.2em; line-height: 1.55; }
.hero { margin: 2rem 0 2.5rem; }
.hero img { display: block; width: 100%; height: auto; aspect-ratio: 2 / 1; }
figcaption { color: var(--dim); margin-top: .75rem; }
.contents { border-block: 1px solid var(--line); padding: 1.3rem 0; margin: 2.2rem 0 2.6rem; }
.contents h2 { font: inherit; margin: 0 0 .7rem; color: var(--dim); }
.contents ol { margin: 0; padding-left: 1.5rem; }
.contents li { margin: .4rem 0; padding-left: .25rem; }
.article-copy h2 { padding-top: 1.65rem; border-top: 1px solid var(--line); }
.article-copy p { text-wrap: pretty; }
.article-return { margin-bottom: 1.5rem; }
.workflow { margin: 2.25rem 0; }
.workflow img { display: block; width: 100%; height: auto; }
.author-signoff { margin-top: 2.4rem; display: flex; align-items: center; gap: .75rem; }
.author-signoff img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.article-footer { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.resource-links { display: grid; gap: 0; padding: 0; margin: 1.8rem 0 2.5rem; list-style: none; border-top: 1px solid var(--line); }
.resource-links li { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.resource-links span { display: block; color: var(--dim); margin-top: .3rem; }
.terminal-strip { border-top: 1px solid var(--chrome-line); padding: .5rem 1.1rem; color: var(--chrome); background: var(--panel); font: 11px/1.5 var(--mono); overflow-wrap: anywhere; }
.terminal-strip span { color: #b2c38e; }

.slide-viewer { margin: 1.5rem 0 2rem; padding: 1rem; border: 1px solid var(--line); background: var(--paper); min-width: 0; }
.slide-viewer:focus-visible { outline-offset: 5px; }
.slide-heading { display: flex; align-items: baseline; justify-content: space-between; gap: .75rem; margin-bottom: .85rem; }
.slide-heading h3 { font: 14px/1.5 var(--mono); margin: 0; }
.slide-count { flex-shrink: 0; color: var(--dim); font: 12px/1.5 var(--mono); }
.slide-stage { aspect-ratio: 16 / 9; min-width: 0; min-height: 0; display: grid; background: var(--paper); }
.slide { margin: 0; width: 100%; height: 100%; min-height: 0; min-width: 0; }
.slide img { display: block; width: 100%; height: 100%; object-fit: contain; }
.slide-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-top: 1rem; font: 12px/1.4 var(--mono); }
.slide-controls button, .slide-controls select { border: 1px solid #9c9387; border-radius: 0; background: var(--paper); color: var(--ink); min-height: 44px; padding: .6rem .7rem; }
.slide-controls button:hover:enabled { background: #eee9de; }
.slide-controls button:disabled { color: #746d64; background: #ebe7de; }
.slide-picker { display: flex; flex: 1 1 100%; align-items: center; gap: .6rem; min-width: 0; }
.slide-picker select { flex: 1; min-width: 0; width: 100%; }
.slide-controls progress { width: 100%; height: 4px; border: 0; accent-color: var(--rust); }
.slide-help, .slide-footer, .slide-error { font: 12px/1.55 var(--mono); }
.slide-help { color: var(--dim); margin: .8rem 0; }
.slide-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .3rem 1rem; margin: .75rem 0 0; padding-top: .75rem; border-top: 1px solid var(--line); }
.slide-error { color: #8b2419; margin: .75rem 0 0; }
.slide-viewer:fullscreen { width: 100vw; height: 100dvh; max-width: none; margin: 0; padding: clamp(.65rem, 2vw, 1.5rem); border: 0; display: grid; grid-template-rows: auto minmax(0, 1fr) auto auto auto auto; overflow: auto; }
.slide-viewer:fullscreen .slide-stage { aspect-ratio: auto; }
.slide-viewer:fullscreen .slide-controls { margin-top: .6rem; }
.slide-viewer:fullscreen .slide-picker { flex-basis: 280px; }
.slide-viewer:fullscreen .slide-help { margin: .4rem 0 0; }
.slide-viewer:fullscreen .slide-footer { margin-top: .5rem; padding-top: .5rem; }
.slide-viewer::backdrop { background: var(--paper); }

@media (min-width: 1100px) {
  .slide-picker { flex-basis: 240px; }
}

@media (max-width: 760px) {
  body { font-size: 18px; }
  .system-bar { padding-inline: .85rem; }
  .system-location { display: none; }
  .workstation { display: block; }
  .file-tree { display: flex; gap: .4rem; flex-wrap: wrap; padding: .45rem .55rem; border-right: 0; border-bottom: 1px solid var(--chrome-line); font-size: 11px; }
  .file-tree p { display: none; }
  .file-tree a { padding: .6rem .5rem; }
  .document { border: 0; margin: 0; }
  .document-tab { padding-inline: 1.25rem; }
  .document-inner { padding-top: 1.5rem; padding-bottom: 2.5rem; }
  h1 { font-size: clamp(2.15rem, 8vw, 3.4rem); }
  .hero { margin-inline: -1.2rem; }
  .hero figcaption { padding-inline: 1.2rem; }
  .slide-viewer { padding: .6rem; margin-inline: -.5rem; }
  .slide-heading { align-items: flex-start; }
  .slide-heading h3 { font-size: 12px; }
  .slide-controls { gap: .45rem; }
  .slide-controls button { padding-inline: .6rem; }
  .slide-viewer:fullscreen .slide-picker { flex-basis: 100%; }
}

@media (max-height: 520px) and (orientation: landscape) {
  .slide-viewer:fullscreen { padding: .5rem; }
  .slide-viewer:fullscreen .slide-heading { margin-bottom: .2rem; }
  .slide-viewer:fullscreen .slide-picker { flex-basis: 240px; }
  .slide-viewer:fullscreen .slide-help { display: none; }
  .slide-viewer:fullscreen .slide-footer { margin-top: .2rem; padding-top: .2rem; }
  .slide-viewer:fullscreen .slide-controls { margin-top: .25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}