/* Jetfold's site speaks in the app's own voices: Charter (the editor's font) for prose and
   headlines, the system font for chrome, monospace for Markdown markup. The colors come from
   the app icon: its paper-white and navy backgrounds, and the blues of the folded jet. */
:root {
  --paper: #fbfcfe;
  --fold: #eff1f7;
  --ink: #141c33;
  --muted: #5d6682;
  --rule: #dfe3ee;
  --jet: #1f6fe8;
  --link: #1556c8;
  --on-jet: #ffffff;
  --sky: #73bfff;
  --kbd-bg: #f2f4f9;
  --shadow: rgba(20, 40, 90, 0.16);
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #071027;
    --fold: #0c1936;
    --ink: #e8ecf6;
    --muted: #9ba5c0;
    --rule: #1d2a4c;
    --jet: #5e9dff;
    --link: #8db6ff;
    --on-jet: #071027;
    --kbd-bg: #111f40;
    --shadow: rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #071027;
  --fold: #0c1936;
  --ink: #e8ecf6;
  --muted: #9ba5c0;
  --rule: #1d2a4c;
  --jet: #5e9dff;
  --link: #8db6ff;
  --on-jet: #071027;
  --kbd-bg: #111f40;
  --shadow: rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

/* ---- base ---- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: clip; }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.6 var(--serif);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--jet); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { text-wrap: balance; }
p, li { text-wrap: pretty; }
code { font: 0.86em var(--mono); }
kbd {
  display: inline-block;
  min-width: 2.2em;
  padding: 1px 7px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--kbd-bg);
  font: 0.8em/1.5 var(--sans);
  text-align: center;
  color: var(--ink);
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; padding: 8px 12px; background: var(--paper); }

/* ---- top bar ---- */
.bar {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 20px;
  font: 15px var(--sans);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 18px var(--sans); }
.brand.small { font-size: 15px; gap: 8px; }
.bar nav { display: flex; gap: 26px; }
.bar nav a { color: var(--muted); text-decoration: none; }
.bar nav a:hover, .bar nav a[aria-current] { color: var(--ink); }
.bar nav a[aria-current] { box-shadow: 0 2px 0 var(--jet); }

/* ---- the App Store badge: inactive until there's a link ---- */
.store {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px 11px 16px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--paper);
  font: 600 16px var(--sans);
  text-decoration: none;
}
.store::before {
  content: "";
  width: 22px;
  height: 22px;
  background: url("/assets/jet.png") center / contain no-repeat;
}
.store.soon { background: transparent; color: var(--muted); border: 1.5px dashed var(--rule); font-weight: 500; }
.button {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 12px;
  background: var(--jet);
  color: var(--on-jet);
  font: 600 16px var(--sans);
  text-decoration: none;
}
.button:hover { filter: brightness(1.08); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px; margin-top: 36px; }
.price { margin: 14px 0 0; font: 15px var(--sans); color: var(--muted); }
.closing .price { margin-top: 14px; }

/* ---- home: the hero ---- */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 40px;
}
.hero h1 {
  margin: 0;
  font-weight: 700;
  font-size: clamp(42px, 7vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.hero h1 em { font-weight: 400; }
.lede { max-width: 32em; margin: 28px 0 0; font-size: 21px; line-height: 1.55; color: var(--muted); }
.lede strong { color: var(--ink); font-weight: 600; }

/* The headline is a note: markup stays hidden until the cursor is inside it (or you point at it). */
.f { cursor: text; border-radius: 4px; }
.mk {
  display: none;
  font: 400 0.52em var(--mono);
  color: var(--muted);
  opacity: 0.8;
  vertical-align: 0.42em;
  letter-spacing: 0;
}
.f.on .mk, .f:hover .mk, .f:focus-visible .mk { display: inline; }
.caret {
  display: inline-block;
  width: 3px;
  height: 0.82em;
  margin: 0 1px;
  vertical-align: -0.06em;
  background: var(--jet);
  border-radius: 2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* The jet's place in the hero; the jet itself flies over the whole page. */
.jet-home { aspect-ratio: 480 / 408; width: 100%; }
.sky { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 2; }
.jet {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  filter: drop-shadow(0 12px 18px rgba(31, 111, 232, 0.28));
  will-change: transform;
}
.jet img { width: 100%; height: 100%; }
.jet:focus-visible { outline-offset: 8px; }
.hero-wrap { position: relative; }

.shot-main { max-width: 1240px; margin: 24px auto 0; padding: 0 12px; }

/* Screenshots of windows carry their own rounded corners, so the shadow follows the image. */
.shot { width: 100%; filter: drop-shadow(0 10px 26px var(--shadow)); }
figure { margin: 0; }
figcaption { margin-top: 12px; font: 14px/1.45 var(--sans); color: var(--muted); }

/* ---- home: feature rows ---- */
.rows { padding-top: 72px; padding-bottom: 24px; }
.row {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 56px;
  align-items: center;
  padding: 56px 0;
  border-top: 1px solid var(--rule);
}
.row.flip { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.row.flip .copy { order: 2; }
.row h2, .section-title { margin: 0 0 14px; font-size: 36px; line-height: 1.12; letter-spacing: -0.01em; }
.row p { margin: 0 0 14px; }
.row p:last-child { margin-bottom: 0; }
.row .shot { justify-self: center; }
.row .shot.slim { max-width: 250px; }

.keys { list-style: none; margin: 20px 0 0; padding: 0; font: 15px var(--sans); }
.keys li { display: flex; align-items: baseline; gap: 12px; padding: 4px 0; }
.keys kbd { min-width: 3.6em; }

/* ---- home: themes band ---- */
.band { background: var(--fold); border-block: 1px solid var(--rule); }
.themes-band { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 48px; align-items: center; padding-top: 72px; padding-bottom: 72px; }
.themes-band p { margin: 0 0 20px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.swatches { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; padding: 0; list-style: none; font: 14px var(--sans); }
.swatches li { display: flex; align-items: center; gap: 7px; padding: 4px 10px 4px 5px; border: 1px solid var(--rule); border-radius: 99px; background: var(--paper); }
.swatches i { width: 16px; height: 16px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12); }

/* ---- home: the promise ---- */
.files { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 56px; align-items: center; padding-top: 96px; padding-bottom: 96px; }
.files blockquote { margin: 0; font-size: clamp(30px, 4vw, 44px); line-height: 1.15; font-weight: 700; letter-spacing: -0.01em; }
.files p { max-width: 32em; margin: 20px 0 0; color: var(--muted); }
.tree {
  margin: 0;
  padding: 24px 28px;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--fold);
  font: 15px/1.75 var(--mono);
  color: var(--muted);
  overflow-x: auto;
}
.tree b { color: var(--ink); font-weight: 500; }

/* ---- home: closing ---- */
.closing { padding-top: 88px; padding-bottom: 96px; text-align: center; border-top: 1px solid var(--rule); }
.closing img { margin: 0 auto 20px; }
.closing h2 { margin: 0; font-size: clamp(32px, 4.4vw, 48px); line-height: 1.1; letter-spacing: -0.01em; }
.closing p { margin: 14px auto 0; max-width: 30em; color: var(--muted); }
.closing .actions { justify-content: center; margin-top: 28px; }

/* ---- page intros (features, themes, support, privacy) ---- */
.intro { padding-top: 56px; padding-bottom: 32px; }
.intro h1 { margin: 0; font-size: clamp(38px, 5.6vw, 64px); line-height: 1.05; letter-spacing: -0.02em; }
.intro p { max-width: 34em; margin: 20px 0 0; font-size: 20px; color: var(--muted); }

/* ---- features page ---- */
.chapter { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 56px; padding-top: 64px; padding-bottom: 64px; border-top: 1px solid var(--rule); }
.chapter .copy { align-self: start; position: sticky; top: 24px; }
.chapter h2 { margin: 0 0 12px; font-size: 32px; line-height: 1.15; }
.chapter .copy > p { margin: 0 0 18px; color: var(--muted); }
.chapter .more { font: 15px var(--sans); }
.ticks { margin: 0 0 20px; padding: 0; list-style: none; font-size: 16.5px; line-height: 1.5; }
.ticks li { position: relative; padding: 5px 0 5px 20px; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 0.95em; width: 7px; height: 7px; border-radius: 2px; background: var(--jet); opacity: 0.7; transform: rotate(45deg); }
.shots { display: grid; gap: 40px; align-items: start; }
.shots figure { justify-self: center; }
.shots img { margin: 0 auto; }

/* ---- themes page ---- */
.picker { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; margin: 8px 0 28px; font: 15px var(--sans); }
.choices { display: flex; flex-wrap: wrap; gap: 8px; }
.choices button, .mode button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 8px;
  border: 1px solid var(--rule);
  border-radius: 99px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.choices button[aria-pressed="true"], .mode button[aria-pressed="true"] { border-color: var(--jet); box-shadow: inset 0 0 0 1px var(--jet); }
.choices i { width: 18px; height: 18px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.15); }
.mode { display: flex; gap: 6px; }
.mode button { padding: 7px 14px; }

/* A Jetfold window drawn in HTML, in whichever theme is picked (the --t-* colors). */
.window {
  --t-sidebar-fill: var(--t-sidebar);
  display: grid;
  grid-template-columns: 200px 260px minmax(0, 1fr);
  height: 540px;
  overflow: hidden;
  border-radius: 12px;
  background: var(--t-bg);
  color: var(--t-text);
  font: 13px/1.4 var(--sans);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.18), 0 24px 60px var(--shadow);
}
.window, .window * { transition: background-color 0.3s, color 0.3s, border-color 0.3s; }
.w-side { padding: 14px 10px; background: var(--t-sidebar-fill); border-right: 1px solid var(--t-border); }
.lights { display: flex; gap: 8px; margin: 0 0 22px 4px; }
.lights i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.lights i + i { background: #febc2e; }
.lights i + i + i { background: #28c840; }
.w-group { margin: 14px 8px 4px; font-size: 11px; font-weight: 600; color: var(--t-muted); }
.w-item { display: flex; justify-content: space-between; padding: 4px 8px; border-radius: 6px; }
.w-item span { color: var(--t-muted); }
.w-item.sel { background: var(--t-accent-soft); color: var(--t-accent-text); }
.w-item.sel span { color: inherit; }
.w-item.in { padding-left: 22px; }
.w-list { background: var(--t-surface); border-right: 1px solid var(--t-border); overflow: hidden; }
.w-head { display: flex; justify-content: space-between; padding: 16px 16px 10px; font-weight: 600; font-size: 14px; }
.w-head span { color: var(--t-muted); font-weight: 400; }
.w-note { margin: 0 8px; padding: 9px 10px; border-radius: 8px; border-bottom: 1px solid var(--t-border); }
.w-note b { display: flex; justify-content: space-between; gap: 8px; font-weight: 600; }
.w-note b span { flex: none; font-weight: 400; font-size: 12px; color: var(--t-muted); }
.w-note p { margin: 2px 0 0; color: var(--t-muted); font-size: 12.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.w-note.sel { background: var(--t-selection); color: var(--t-on-selection); border-color: transparent; }
.w-note.sel b span, .w-note.sel p { color: var(--t-on-selection); opacity: 0.85; }
.w-edit { padding: 40px 44px; background: var(--t-surface); font: 15px/1.6 var(--serif); overflow: hidden; }
.w-title { margin: 0 0 14px; font-size: 26px; line-height: 1.2; }
.w-edit h4 { margin: 18px 0 6px; font-size: 18px; }
.w-edit p { margin: 0 0 10px; }
.w-edit a { color: var(--t-accent-text); }
.w-edit mark { background: var(--t-highlight-bg); color: inherit; border-radius: 3px; padding: 0 2px; }
.w-edit code { padding: 1px 5px; border-radius: 4px; background: var(--t-code-bg); color: var(--t-syn-string); }
.w-task { display: flex; align-items: center; gap: 9px; margin: 4px 0; }
.w-task i { flex: none; width: 15px; height: 15px; border: 1.5px solid var(--t-muted); border-radius: 4px; }
.w-task.done i { background: var(--t-accent); border-color: var(--t-accent); }
.w-task.done { color: var(--t-muted); }
.w-task.done em { text-decoration: line-through; font-style: normal; }
.chip { white-space: nowrap; padding: 0 7px; border-radius: 99px; background: var(--t-accent-soft); color: var(--t-accent-text); font: 12px/1.6 var(--sans); }
.chip.late { background: var(--t-warn-soft); color: var(--t-warn); }
.w-quote { margin: 14px 0 0; padding-left: 14px; border-left: 3px solid var(--t-border); color: var(--t-muted); font-style: italic; }
.theme-notes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; padding-top: 56px; padding-bottom: 88px; font-size: 17px; }
.theme-notes h2 { margin: 0 0 8px; font-size: 22px; }
.theme-notes p { margin: 0; color: var(--muted); }

/* ---- guide ---- */
.guide { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 56px; padding-top: 32px; padding-bottom: 80px; }
.toc { position: sticky; top: 24px; align-self: start; max-height: calc(100vh - 48px); overflow-y: auto; font: 14.5px/1.4 var(--sans); }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--ink); background: var(--fold); }
.toc a[aria-current] { color: var(--ink); background: var(--fold); font-weight: 600; }
.toc-home { margin-bottom: 8px; font-weight: 600; color: var(--ink) !important; }
.toc ol { margin: 0; padding: 0; list-style: none; }

.prose { max-width: 44em; min-width: 0; }
.prose h1 { margin: 0 0 24px; font-size: clamp(36px, 5vw, 52px); line-height: 1.08; letter-spacing: -0.02em; }
.prose h2 { margin: 56px 0 12px; font-size: 30px; line-height: 1.2; }
.prose h3 { margin: 36px 0 8px; font-size: 22px; line-height: 1.25; }
.prose h2, .prose h3 { position: relative; scroll-margin-top: 24px; }
.anchor { position: absolute; left: -0.9em; color: var(--rule); text-decoration: none; opacity: 0; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }
.prose p, .prose ul, .prose ol { margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose img { margin: 28px auto; filter: drop-shadow(0 8px 22px var(--shadow)); }
.prose code { padding: 1px 5px; border-radius: 5px; background: var(--kbd-bg); }
.prose pre { margin: 0 0 18px; padding: 16px 18px; border-radius: 10px; background: var(--fold); border: 1px solid var(--rule); overflow-x: auto; font-size: 15px; line-height: 1.55; }
.prose pre code { padding: 0; background: none; }
.prose blockquote { margin: 0 0 18px; padding: 2px 18px; border-left: 3px solid var(--rule); color: var(--muted); }
.prose blockquote.tip { border-left-color: var(--jet); background: var(--fold); border-radius: 0 10px 10px 0; padding: 12px 18px; color: var(--ink); }
.prose blockquote.tip p:last-child { margin: 0; }
.prose table { width: 100%; margin: 0 0 20px; border-collapse: collapse; font: 15.5px/1.45 var(--sans); display: block; overflow-x: auto; }
.prose th, .prose td { padding: 9px 12px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.prose th { font-weight: 600; border-bottom-width: 2px; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }

.prose ol.chapters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 0 0 32px; padding: 0; list-style: none; counter-reset: chapter; }
.chapters li { margin: 0; counter-increment: chapter; }
.chapters a { display: block; height: 100%; padding: 14px 18px 14px 50px; position: relative; border: 1px solid var(--rule); border-radius: 12px; color: var(--ink); text-decoration: none; }
.chapters a::before { content: counter(chapter); position: absolute; left: 18px; top: 15px; font: 600 15px var(--sans); color: var(--muted); }
.chapters a:hover { border-color: var(--jet); }
.chapters b { display: block; font-size: 18px; line-height: 1.3; }
.chapters span { display: block; margin-top: 3px; font: 14.5px/1.4 var(--sans); color: var(--muted); }
.chapters code { padding: 0; background: none; }

.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--rule); font: 16px var(--sans); }
.pager a { display: flex; flex-direction: column; gap: 2px; text-decoration: none; font-weight: 600; }
.pager a span { font-weight: 400; font-size: 14px; color: var(--muted); }
.pager .next { text-align: right; margin-left: auto; }

/* ---- support, privacy ---- */
.doc { max-width: 44em; padding-bottom: 88px; }
.faq { margin: 0; }
.faq dt { margin: 32px 0 6px; font-weight: 700; font-size: 20px; }
.faq dd { margin: 0; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin: 16px 0 24px; }
.cards a { display: block; padding: 20px 22px; border: 1px solid var(--rule); border-radius: 14px; color: var(--ink); text-decoration: none; }
.cards a:hover { border-color: var(--jet); }
.cards b { display: block; font-size: 19px; }
.cards span { display: block; margin-top: 4px; font: 15px/1.45 var(--sans); color: var(--muted); }

/* ---- 404 ---- */
.lost { padding-top: 64px; padding-bottom: 120px; text-align: center; }
.lost img { width: 200px; margin: 0 auto 28px; transform: rotate(118deg); }
.lost h1 { margin: 0; font-size: clamp(36px, 5vw, 56px); }
.lost p { margin: 14px 0 0; color: var(--muted); }

/* ---- footer ---- */
.foot { padding: 32px 0 44px; border-top: 1px solid var(--rule); font: 14px var(--sans); color: var(--muted); }
.foot .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 28px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.foot nav a { color: var(--muted); text-decoration: none; }
.foot nav a:hover { color: var(--ink); }
.foot p { margin: 0; width: 100%; }

/* ---- smaller screens ---- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 24px; }
  .jet-home { order: -1; width: 150px; justify-self: end; margin-bottom: -16px; }
  .row, .row.flip, .themes-band, .files, .chapter { grid-template-columns: 1fr; gap: 28px; }
  .row.flip .copy { order: 0; }
  .chapter .copy { position: static; }
  .guide { grid-template-columns: 1fr; gap: 24px; }
  .toc { position: static; max-height: none; }
  .toc ol { display: none; }
  .toc-home { display: inline-block !important; margin: 0; padding-left: 0 !important; background: none !important; color: var(--muted) !important; }
  .theme-notes, .cards, .prose ol.chapters { grid-template-columns: 1fr; }
  .window { grid-template-columns: 220px minmax(0, 1fr); height: 480px; }
  .w-side { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 17px; }
  .wrap { padding-left: 16px; padding-right: 16px; }
  .bar nav { gap: 16px; }
  .bar nav .hide-small { display: none; }
  .lede, .intro p { font-size: 18.5px; }
  .row { padding: 40px 0; }
  .row h2, .section-title { font-size: 28px; }
  .pair { grid-template-columns: 1fr; }
  .window { grid-template-columns: minmax(0, 1fr); height: auto; }
  .w-list { display: none; }
  .w-edit { padding: 28px 22px; }
  .anchor { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
  .window, .window * { transition: none; }
}