/* The fonts are the program's own files, unchanged, under the SIL Open Font License 1.1 (fonts/OFL-*.txt). */
/* fonts:start */
@font-face { font-family: 'Cinzel'; src: url('fonts/Cinzel-VF.ttf') format('truetype'); font-weight: 400 900; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('fonts/IBMPlexMono-Regular.ttf') format('truetype'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('fonts/IBMPlexMono-Bold.ttf') format('truetype'); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: 'Noto Sans Old Italic'; src: url('fonts/NotoSansOldItalic-Regular.ttf') format('truetype'); font-display: swap; }
/* fonts:end */

/* Layout concept: one dark column, like the program's own window. Dashed frames with a label tab
   hold what you operate (the keyboard, the screenshots); plain dashed rules separate everything else. */
:root {
  --ink: #090908;
  --soot: #1c1a17;
  --bone: #e3d1b4;
  --bone-soft: #a89982;
  --dim: #92806a;
  --faint: #4e453b;
  --rule: #5f5448;
  --bronze: #c99652;
  --terracotta: #d6643e;
  --display: 'Cinzel', 'Times New Roman', serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  --old-italic: 'Noto Sans Old Italic', 'Segoe UI Historic', serif;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--bone-soft);
  font: 15px/1.7 var(--mono);
  padding-block: 0 2.5rem;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

.wrap { max-width: 62rem; margin-inline: auto; }
img { display: block; max-width: 100%; height: auto; }
p { margin: 0 0 1rem; max-width: 66ch; }
b, strong { color: var(--bone); font-weight: 700; }
i { font-style: italic; }
a { color: var(--bronze); text-decoration: underline dashed 1px; text-underline-offset: 0.25em; }
a:hover { color: var(--bone); }
:focus-visible { outline: 2px dashed var(--bronze); outline-offset: 3px; }
code, kbd { font: inherit; color: var(--bone); }
button { font: inherit; border-radius: 0; }
.small { font-size: 12.5px; line-height: 1.6; color: var(--dim); max-width: 80ch; }

/* ---- top bar ---------------------------------------------------------------------------- */
.top {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: 0.4rem 1.5rem; padding-block: 1rem; border-bottom: 1px dashed var(--rule); font-size: 13px;
}
.brand {
  font: 500 14px/1 var(--display); letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--bone); text-decoration: none;
}
.top nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1.4rem; }
.top nav a { color: var(--bone-soft); text-decoration: none; }
.top nav a:hover { color: var(--bone); }

/* ---- hero ------------------------------------------------------------------------------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 1.6rem 3.2rem; align-items: center; padding-block: 2.4rem 2rem;
}
.logo-wrap { margin: 0; }
.logo { width: 100%; max-width: 26rem; margin-inline: auto; mix-blend-mode: lighten; }
.etr { display: block; font: 400 22px/1.2 var(--old-italic); letter-spacing: 0.24em; color: var(--bronze); margin-bottom: 0.9rem; }
.lead {
  font: 500 clamp(24px, 3.6vw, 36px)/1.22 var(--display); letter-spacing: 0.03em;
  color: var(--bone); margin: 0 0 1.1rem; text-wrap: balance;
}
.tagline { font-style: italic; color: var(--bronze); margin-top: 0.4rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.5rem 0 0.9rem; }
.btn {
  display: inline-block; padding: 0.55rem 1.2rem; border: 1px solid var(--bone);
  color: var(--bone); text-decoration: none; font-weight: 400; background: transparent;
}
.btn:hover { border-color: var(--bronze); color: var(--bronze); }
.btn-primary { background: var(--bone); color: var(--ink); font-weight: 700; }
.btn-primary:hover { background: var(--bronze); border-color: var(--bronze); color: var(--ink); }

/* ---- the nail between parts ---------------------------------------------------------------- */
.rule { display: flex; align-items: center; gap: 0.9rem; color: var(--bone-soft); margin-block: 0.4rem; }
.rule::before, .rule::after { content: ""; flex: 1; border-top: 1px dashed var(--rule); }
.rule svg { flex: none; }

/* ---- sections --------------------------------------------------------------------------- */
section { padding-top: 2.8rem; }
.sec {
  display: flex; align-items: center; gap: 1rem; margin: 0 0 1.2rem;
  font: 500 clamp(15px, 2.4vw, 19px)/1.2 var(--display); letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--bone);
}
.sec::after { content: ""; flex: 1; border-top: 1px dashed var(--rule); }
.sub { margin: 2.2rem 0 0.6rem; font: 700 15px/1.4 var(--mono); color: var(--bone); }

/* ---- the frame with a label tab, as in the program ----------------------------------------- */
.pane { position: relative; margin: 1.1rem 0 1.2rem; border: 1px dashed var(--rule); padding: 1.6rem 1.2rem 1.1rem; }
.pane > .tab {
  position: absolute; left: 1rem; top: 0; transform: translateY(-52%);
  background: var(--bone-soft); color: var(--ink); font-weight: 700; font-size: 12.5px;
  line-height: 1.55; padding: 0 0.6rem; max-width: calc(100% - 2rem);
}

/* ---- controls ----------------------------------------------------------------------------- */
.ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.7rem; margin-bottom: 0.9rem; font-size: 13.5px; }
.grp { display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem 0.6rem; }
.lbl { color: var(--dim); }
.val { min-width: 1.6ch; text-align: center; color: var(--bone); }
.seg { display: inline-flex; flex-wrap: wrap; }
.seg button, .br {
  color: var(--bone-soft); background: transparent; border: 1px solid transparent;
  padding: 0.12rem 0.7rem; cursor: pointer; line-height: 1.6;
}
.br { padding-inline: 0.2rem; }
.seg button:hover:not([aria-checked="true"]), .br:hover:not(:disabled) { color: var(--bone); }
.seg button[aria-checked="true"] { background: var(--bone); color: var(--ink); font-weight: 700; }
.br:disabled { color: var(--faint); cursor: default; }
.status { color: var(--dim); }
.status.on { color: var(--bronze); }
.readout { margin-left: auto; display: flex; gap: 0.6rem; justify-content: flex-end; }
.readout #readout { min-width: 9ch; text-align: right; color: var(--bone); font-weight: 700; }
.ctl-play { margin-bottom: 1.1rem; }

/* ---- the keyboard --------------------------------------------------------------------------- */
.board {
  position: relative; width: 100%; max-width: 52rem; margin: 0 auto; aspect-ratio: 12.5 / 4;
  container: board / inline-size; user-select: none; -webkit-user-select: none;
}
.key {
  --len: 3;
  position: absolute; width: 7.2%; height: 22.5%; margin: 0; padding: 0; text-align: left;
  border: 1px solid var(--bone); background: var(--bone); color: var(--ink); cursor: pointer;
  touch-action: none; -webkit-tap-highlight-color: transparent; font-family: var(--mono);
}
.key .lg {
  position: absolute; left: 0.3em; top: 0.12em; font-weight: 400; line-height: 1.1; pointer-events: none;
  font-size: clamp(6.5px, 1.3cqw, 10.5px);
}
.key .nm {
  position: absolute; left: 0; right: 0; top: 54%; transform: translateY(-50%); text-align: center;
  white-space: nowrap; font-weight: 400; pointer-events: none;
  font-size: clamp(7px, min(calc(10.56cqw / var(--len)), 2.4cqw), 15px);
}
.key.is-sharp { background: var(--soot); color: var(--bone); border-color: var(--bone); }
.key.is-mark { background: var(--bronze); border-color: var(--bronze); color: var(--ink); }
.key.is-silent { background: transparent; border: 1px dashed var(--dim); color: var(--dim); cursor: default; }
.key.is-down { background: var(--terracotta); border-color: var(--terracotta); color: var(--ink); border-style: solid; }
.key:focus-visible { outline: 2px dashed var(--bronze); outline-offset: 2px; z-index: 1; }
@container board (max-width: 30rem) { .key .lg { display: none; } }

.cap { color: var(--dim); font-size: 13px; margin: 0.9rem 0 0; max-width: none; }
.cap.warn { color: var(--terracotta); }

/* ---- features ----------------------------------------------------------------------------- */
.feat {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 0 2.6rem; list-style: none; margin: 0; padding: 0;
}
.feat li { display: grid; gap: 0.2rem; align-content: start; padding: 1rem 0 1.2rem; border-top: 1px dashed var(--rule); }
.feat b { font-size: 15px; }

/* ---- screenshots -------------------------------------------------------------------------- */
.shots { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr)); gap: 1.8rem 1.6rem; }
.shots .pane { margin: 1.1rem 0 0.4rem; padding: 1.5rem 0.7rem 0.7rem; }
.shots img { border: 1px solid var(--faint); }

/* ---- install ------------------------------------------------------------------------------ */
.oslist { margin-top: 1.4rem; }
.os {
  display: grid; grid-template-columns: minmax(0, 14rem) minmax(0, 1fr); gap: 0.3rem 1.8rem;
  padding: 1rem 0 1.1rem; border-top: 1px dashed var(--rule);
}
.os:last-child { border-bottom: 1px dashed var(--rule); }
.os h3 { margin: 0; font: 700 14px/1.55 var(--mono); color: var(--bone); }
.osgroup-title { margin: 0 0 0.3rem; font: 700 14px/1.55 var(--mono); color: var(--bone); }
.osgroup { margin-bottom: 0; }
.osgroup .os:last-child { border-bottom: 0; }
.osgroup.mine > .osgroup-title::after, .os.mine > h3::after {
  content: "your system"; display: inline-block; margin-left: 0.6rem; padding: 0 0.45rem;
  background: var(--bronze); color: var(--ink); font-size: 11px; font-weight: 700; vertical-align: 0.1em;
}
.os p { margin: 0; max-width: none; }
.file { color: var(--dim); font-size: 13px; overflow-wrap: anywhere; }
.how { margin-top: 0.4rem !important; font-size: 13.5px; }
.cmd { display: flex; align-items: stretch; margin-top: 0.5rem; background: var(--soot); border: 1px solid var(--faint); max-width: 46rem; }
.cmd-wide { margin-bottom: 0.4rem; }
.cmd code { flex: 1; min-width: 0; padding: 0.45rem 0.8rem; font-size: 13px; white-space: pre-wrap; overflow-wrap: anywhere; user-select: all; -webkit-user-select: all; }
.cmd .copy {
  flex: none; font-size: 12px; color: var(--bone-soft); background: transparent; border: 0;
  border-left: 1px solid var(--faint); padding: 0 0.9rem; cursor: pointer;
}
.cmd .copy:hover { background: var(--bone); color: var(--ink); }
.plain { margin: 0 0 1rem; padding-left: 1.2rem; max-width: 66ch; }
.plain li { margin-bottom: 0.5rem; }
.plain li::marker { color: var(--rule); }
.tablewrap { overflow-x: auto; margin-top: 0.6rem; }
.plat { border-collapse: collapse; width: 100%; min-width: 40rem; font-size: 13px; }
.plat th, .plat td { text-align: left; vertical-align: top; padding: 0.6rem 1.2rem 0.6rem 0; border-top: 1px dashed var(--rule); }
.plat thead th { color: var(--bone); border-top: 0; font-weight: 700; }
.plat tbody th { color: var(--bone-soft); font-weight: 400; width: 22%; }

/* ---- quick start -------------------------------------------------------------------------- */
.steps { list-style: none; counter-reset: step; margin: 0 0 1.4rem; padding: 0; display: grid; gap: 0.2rem; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 2.1rem minmax(0, 1fr); gap: 0 1rem; align-items: start; padding: 0.6rem 0; max-width: 66ch; }
.steps li > div { padding-top: 0.15rem; }
.steps li::before {
  content: counter(step); display: grid; place-items: center; width: 2.1rem; height: 2.1rem;
  border: 1px dashed var(--dim); color: var(--bronze); font-weight: 700;
}
.callout { border: 1px dashed var(--terracotta); padding: 0.9rem 1.1rem; max-width: 66ch; }

/* ---- the name ----------------------------------------------------------------------------- */
.name-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 1rem 3rem; align-items: center; }
.etr-big { margin: 0; }
.etr-big div { font: 400 clamp(30px, 6.4vw, 54px)/1.25 var(--old-italic); letter-spacing: 0.14em; color: var(--bronze); overflow-wrap: anywhere; }
.etr-big figcaption { margin-top: 0.8rem; font-size: 12.5px; color: var(--dim); max-width: 36ch; }
sup { font-size: 0.72em; line-height: 0; vertical-align: super; }
sup a { color: var(--bronze); text-decoration: none; padding-inline: 0.08em; }
sup a:hover, sup a:focus-visible { text-decoration: underline; }
.sources { margin: 1.6rem 0 0; padding-left: 1.7em; max-width: 66ch; font-size: 12.5px; line-height: 1.6; color: var(--dim); }
.sources li { margin: 0.35rem 0; padding-left: 0.2em; }
.sources li::marker { color: var(--bronze); }
.sources li:target { color: var(--bone-soft); }

/* ---- footer ------------------------------------------------------------------------------- */
.foot { padding-top: 3.2rem; }
.foot .links { display: flex; flex-wrap: wrap; gap: 0.3rem 1.6rem; }

/* ---- phones ------------------------------------------------------------------------------- */
@media (max-width: 760px) {
  .hero { grid-template-columns: minmax(0, 1fr); padding-block: 1.6rem 1.4rem; }
  .logo { max-width: 17rem; }
  .os { grid-template-columns: minmax(0, 1fr); }
  .name-grid { grid-template-columns: minmax(0, 1fr); }
  .readout { margin-left: 0; text-align: left; flex-basis: 100%; }
}
@media (max-width: 480px) {
  .pane { padding-inline: 0.7rem; }
  .ctl { gap: 0.5rem 1.2rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }