/* Beeper Morse Console: styles extracted from the approved mock (web/mock.html).
   Tokens, both themes, fonts, panels, readouts, encoder strip and status bar are
   the mock's; the simulation bar and the design-review sections are gone, and a
   few real-app pieces are added at the end (Start button, message bar, chopped
   signal hint, resting placeholders, Desktop app panel). */

:root {
  --bg: #E4E7EA;
  --page-ink: #1B2126;
  --panel: #F6F7F8;
  --panel-2: #EBEEF0;
  --chrome: #D6DADF;
  --line: #C3C9CF;
  --grid: #DCE0E4;
  --ink: #1B2126;
  --ink-2: #4A545D;
  --ink-3: #7B858E;
  --trace: #B8621A;
  --trace-fill: rgba(184, 98, 26, 0.16);
  --spec: #276A85;
  --spec-fill: rgba(39, 106, 133, 0.14);
  --on: #B8621A;
  --off: #CBD0D5;
  --thr: #6D5AA6;
  --good: #2E7D4F;
  --warn: #A8641C;
  --warn-bg: rgba(184, 98, 26, 0.10);
  --focus: #276A85;
  --shadow: 0 18px 40px rgba(27, 33, 38, 0.16), 0 2px 6px rgba(27, 33, 38, 0.10);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141719;
    --page-ink: #E3E7EA;
    --panel: #1D2124;
    --panel-2: #242a2e;
    --chrome: #2A3035;
    --line: #353C42;
    --grid: #282E33;
    --ink: #E3E7EA;
    --ink-2: #A5ADB4;
    --ink-3: #6E777F;
    --trace: #EFA24E;
    --trace-fill: rgba(239, 162, 78, 0.18);
    --spec: #62B3D2;
    --spec-fill: rgba(98, 179, 210, 0.16);
    --on: #EFA24E;
    --off: #343B41;
    --thr: #A796DB;
    --good: #5CB77F;
    --warn: #EFA24E;
    --warn-bg: rgba(239, 162, 78, 0.12);
    --focus: #62B3D2;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141719;
  --page-ink: #E3E7EA;
  --panel: #1D2124;
  --panel-2: #242a2e;
  --chrome: #2A3035;
  --line: #353C42;
  --grid: #282E33;
  --ink: #E3E7EA;
  --ink-2: #A5ADB4;
  --ink-3: #6E777F;
  --trace: #EFA24E;
  --trace-fill: rgba(239, 162, 78, 0.18);
  --spec: #62B3D2;
  --spec-fill: rgba(98, 179, 210, 0.16);
  --on: #EFA24E;
  --off: #343B41;
  --thr: #A796DB;
  --good: #5CB77F;
  --warn: #EFA24E;
  --warn-bg: rgba(239, 162, 78, 0.12);
  --focus: #62B3D2;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--page-ink);
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}
.mono { font-family: "IBM Plex Mono", Consolas, "Courier New", monospace; font-variant-numeric: tabular-nums; }
a { color: var(--spec); }
[hidden] { display: none !important; }

.page { max-width: 1180px; margin: 0 auto; padding: 36px 24px 64px; display: grid; gap: 28px; }
.intro { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: end; }
.intro h1 { margin: 0; font-size: 26px; font-weight: 600; letter-spacing: -0.01em; text-wrap: balance; }
.intro p { margin: 6px 0 0; color: var(--ink-2); max-width: 62ch; }
.eyebrow { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }
.facts { display: grid; grid-auto-flow: column; gap: 18px; font-size: 13px; color: var(--ink-2); }
.facts b { display: block; font-weight: 500; color: var(--ink); font-size: 15px; }

/* ---------- the app window ---------- */
.win {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
}
.titlebar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 8px 12px; background: var(--chrome); border-bottom: 1px solid var(--line);
  color: var(--ink-2); font-size: 12.5px;
}
.titlebar .dots { display: inline-flex; gap: 6px; margin-right: 4px; }
.titlebar .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); display: block; }
.titlebar .name { font-weight: 600; color: var(--ink); }
.toolbar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--panel-2);
}
.field { display: inline-flex; align-items: center; gap: 8px; }
.field label { color: var(--ink-2); font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; }
.field.check { gap: 6px; color: var(--ink-2); font-size: 12.5px; cursor: pointer; user-select: none; }
.field.check input { accent-color: var(--trace); margin: 0; width: 14px; height: 14px; }
.ctl {
  height: 28px; padding: 0 10px; border: 1px solid var(--line); border-radius: 4px;
  background: var(--panel); color: var(--ink); font: inherit; font-size: 13px;
}
.ctl.mono { width: 88px; text-align: right; }
select.ctl { min-width: 250px; max-width: 360px; }
select.ctl.narrow { min-width: 150px; max-width: 200px; }
button.ctl { cursor: pointer; padding: 0 12px; }
button.ctl:hover:not(:disabled) { border-color: var(--ink-3); }
button.ctl:disabled { opacity: 0.5; cursor: default; }
button.ctl.primary { background: var(--trace); border-color: var(--trace); color: #fff; font-weight: 500; }
button.ctl.primary:hover:not(:disabled) { filter: brightness(1.05); }
button.ctl.start { min-width: 84px; font-weight: 600; }
button.ctl.start.running { background: var(--panel); border-color: var(--ink-3); color: var(--ink); }
.ctl:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.seg button { height: 28px; border: 0; background: var(--panel); color: var(--ink-2); font: inherit; font-size: 12.5px; padding: 0 10px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--panel); }
.spacer { flex: 1; }
.unit { color: var(--ink-3); }

/* message bar (unsupported browser, permission errors) and the chopped-signal hint */
.msgbar {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 8px 14px; border-bottom: 1px solid var(--line);
  background: var(--warn-bg); color: var(--ink); font-size: 13px;
}
.msgbar.error { color: var(--ink); }
.msgbar .icon { color: var(--warn); font-weight: 700; flex: none; }
.msgbar .txt { flex: 1; }
.msgbar .txt b { font-weight: 600; }
.msgbar button.x {
  flex: none; border: 0; background: transparent; color: var(--ink-2); font: inherit; font-size: 16px; line-height: 1;
  cursor: pointer; padding: 0 4px; border-radius: 4px;
}
.msgbar button.x:hover { color: var(--ink); background: var(--panel); }
.msgbar.note { background: var(--panel-2); }
.msgbar.star { background: var(--panel-2); }
.msgbar.star .icon { color: var(--trace); }
.msgbar.star a { color: var(--ink); font-weight: 600; }
a.star { color: var(--ink-2); text-decoration: none; white-space: nowrap; }
a.star:hover { color: var(--ink); text-decoration: underline; }
a.star .starcount:not(:empty)::before { content: " · "; }
.foot a.star { margin-left: 8px; }

.body { display: grid; grid-template-columns: minmax(0, 1fr) 232px; }
.main { display: grid; grid-template-rows: 212px 232px minmax(168px, auto); border-right: 1px solid var(--line); min-width: 0; }
.panel { position: relative; border-bottom: 1px solid var(--line); display: grid; grid-template-rows: auto minmax(0, 1fr); min-width: 0; }
.panel:last-child { border-bottom: 0; }
.panel header {
  display: flex; align-items: baseline; gap: 10px; padding: 8px 14px 0; flex-wrap: wrap;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); font-weight: 500;
}
.panel header span { text-transform: none; letter-spacing: 0; color: var(--ink-3); font-weight: 400; }
.panel header .tag {
  margin-left: auto; text-transform: none; letter-spacing: 0; font-weight: 600; font-size: 11px;
  width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center;
  background: var(--ink); color: var(--panel);
}
.plot { position: relative; min-height: 0; }
.plot canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#powerPlot { display: grid; grid-template-rows: auto minmax(0, 1fr) 26px; }
#powerPlot .plot { position: relative; }

.decoded { display: grid; grid-template-columns: minmax(0, 1fr) 210px; min-height: 0; }
.tape { padding: 6px 14px 12px; display: grid; grid-template-rows: auto minmax(0, 1fr); gap: 6px; min-height: 0; min-width: 0; }
.tape .live { display: flex; align-items: center; gap: 10px; color: var(--ink-2); font-size: 12px; }
.tape .live .sym { color: var(--trace); font-size: 18px; letter-spacing: 0.15em; min-width: 6ch; }
.tape .live .sym .cur { opacity: 0.55; }
.tape .live .sym .prov { opacity: 0.55; }
.text {
  font-size: 24px; line-height: 1.3; letter-spacing: 0.06em; color: var(--ink);
  overflow: auto; white-space: pre-wrap; word-break: break-all; padding-right: 8px;
}
.text .caret { display: inline-block; width: 0.55ch; height: 1em; background: var(--trace); vertical-align: -0.15em; margin-left: 1px; animation: blink 1s steps(1) infinite; }
.text .placeholder { color: var(--ink-3); font-size: 14px; letter-spacing: 0; font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif; }
@keyframes blink { 50% { opacity: 0; } }
.timing { border-left: 1px solid var(--line); padding: 8px 14px 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; align-content: start; font-size: 12px; color: var(--ink-2); }
.timing .k { color: var(--ink-3); }
.timing .v { color: var(--ink); text-align: right; }
.timing .full { grid-column: 1 / -1; }
.hist { grid-column: 1 / -1; height: 42px; position: relative; }
.hist canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.rail { display: grid; grid-template-rows: auto 1fr auto; background: var(--panel-2); }
.rail .block { padding: 12px 14px; border-bottom: 1px solid var(--line); }
.rail .block:last-child { border-bottom: 0; }
.rail h4 { margin: 0 0 8px; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); font-weight: 500; }
.meter { display: grid; grid-template-columns: 26px 1fr; gap: 10px; height: 150px; position: relative; }
/* Absolutely positioned like the other canvases: a canvas sized from its own
   clientHeight inside an auto grid row would otherwise grow on every resize. */
.meter canvas { position: absolute; top: 0; bottom: 0; left: 36px; right: 0; width: auto; height: auto; display: block; }
.meter .scale { position: relative; height: 100%; font-size: 10px; color: var(--ink-3); }
.meter .scale span { position: absolute; right: 0; transform: translateY(-50%); }
.wave { height: 54px; position: relative; margin-top: 10px; }
.wave canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.readouts { display: grid; gap: 10px; }
.ro { display: grid; grid-template-columns: 1fr auto; align-items: baseline; }
.ro .k { font-size: 12px; color: var(--ink-3); }
.ro .v { font-size: 15px; color: var(--ink); }
.ro .v small { font-size: 11px; color: var(--ink-3); margin-left: 3px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.05em; border: 1px solid var(--line); color: var(--ink-2); background: var(--panel);
}
.pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--off); display: block; }
.pill.on { color: var(--on); border-color: var(--on); }
.pill.on i { background: var(--on); box-shadow: 0 0 0 3px var(--trace-fill); }
.rail .tip { font-size: 12px; color: var(--ink-3); }
.rail .tip b { color: var(--ink-2); font-weight: 500; }

/* ---------- encoder ---------- */
.encode { border-top: 1px solid var(--line); display: grid; grid-template-rows: auto auto; }
.encode header {
  display: flex; align-items: baseline; gap: 10px; padding: 8px 14px 0; flex-wrap: wrap;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); font-weight: 500;
}
.encode header span { text-transform: none; letter-spacing: 0; color: var(--ink-3); font-weight: 400; }
.encode header .tag {
  margin-left: auto; text-transform: none; letter-spacing: 0; font-weight: 600; font-size: 11px;
  width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--panel);
}
.enc-body { display: grid; grid-template-columns: minmax(0, 1fr) 232px; }
.enc-left { padding: 8px 14px 12px; display: grid; gap: 8px; min-width: 0; align-content: start; }
.enc-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.enc-row > .field, .enc-row > button { flex: 0 0 auto; }
/* The message gets a full-width line of its own, so a long text stays readable and
   easy to click whatever the window width; the controls wrap on the line below. */
.enc-msg { display: flex; min-width: 0; }
.enc-msg input[type="text"] {
  flex: 1 1 auto; width: 100%; min-width: 0; height: 34px; font-size: 15px; padding: 0 12px;
  text-transform: uppercase; letter-spacing: 0.04em; text-align: left;
}
.enc-out {
  font-size: 17px; letter-spacing: 0.12em; line-height: 1.5; color: var(--ink); min-height: 1.5em;
  white-space: pre-wrap; word-break: break-word; padding: 6px 10px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px;
}
.enc-out .sep { color: var(--ink-3); }
.enc-guide { height: 46px; position: relative; }
.enc-guide canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.enc-right { border-left: 1px solid var(--line); background: var(--panel-2); padding: 12px 14px; display: grid; gap: 10px; align-content: start; }
.enc-right .ro .v { font-size: 15px; }
.enc-right .tip { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

.statusbar {
  display: flex; gap: 18px; padding: 6px 14px; background: var(--chrome); border-top: 1px solid var(--line);
  color: var(--ink-2); font-size: 12px; flex-wrap: wrap;
}
.statusbar .dot { color: var(--ink-3); }
.statusbar .dot.live { color: var(--good); }
.statusbar .dot.paused { color: var(--warn); }
.statusbar .right { margin-left: auto; }

/* ---------- desktop app download panel ---------- */
.dl {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; color: var(--ink);
  display: grid; grid-template-columns: minmax(0, 1fr) 300px; overflow: hidden;
}
.dl > div { padding: 16px 18px; }
.dl h2 { margin: 0 0 6px; font-size: 17px; font-weight: 600; }
.dl p { margin: 4px 0 0; color: var(--ink-2); font-size: 14px; max-width: 62ch; }
.dl .assets { border-left: 1px solid var(--line); background: var(--panel-2); font-size: 13px; display: grid; gap: 8px; align-content: start; }
.dl .assets .k { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); font-weight: 500; }
.dl .asset { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: baseline; }
.dl .asset a { color: var(--ink); font-weight: 500; text-decoration: none; overflow-wrap: anywhere; }
.dl .asset a:hover { text-decoration: underline; color: var(--spec); }
.dl .asset .size { color: var(--ink-3); }
.dl .howto { color: var(--ink-2); font-size: 12.5px; padding-top: 4px; border-top: 1px solid var(--line); }
.dl code { font-family: "IBM Plex Mono", Consolas, "Courier New", monospace; font-size: 12.5px; background: var(--panel); border: 1px solid var(--line); border-radius: 3px; padding: 1px 5px; color: var(--ink); }
.dl .muted { color: var(--ink-3); }

/* ---------- notes ---------- */
.notes { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px 28px; }
.note { display: grid; grid-template-columns: 22px 1fr; gap: 10px; align-items: start; padding: 8px 0; border-top: 1px solid var(--line); }
.note .tag { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--bg); font-size: 11px; font-weight: 600; margin-top: 2px; }
.note h3 { margin: 0; font-size: 15px; font-weight: 600; }
.note p { margin: 2px 0 0; color: var(--ink-2); font-size: 14px; }
/* ---------- about and FAQ ---------- */
.about { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; color: var(--ink); padding: 18px 20px 6px; }
.about h2 { margin: 0 0 10px; font-size: 18px; font-weight: 600; }
.about h2 + .cols { margin-bottom: 18px; }
.about .lead { font-size: 14px; line-height: 1.55; color: var(--ink-2); max-width: 80ch; margin: 0 0 18px; }
.about .lead b { color: var(--ink); font-weight: 600; }
.about .cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
.about h3 { margin: 12px 0 4px; font-size: 14px; font-weight: 600; color: var(--ink); }
.about p { margin: 0 0 8px; color: var(--ink-2); font-size: 13.5px; line-height: 1.5; max-width: 68ch; }
.about .faq { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
.about .qa h3 { margin-top: 10px; }
.about .qa p { margin-bottom: 12px; }
@media (max-width: 900px) {
  .about .cols, .about .faq { grid-template-columns: 1fr; }
}
.foot { color: var(--ink-3); font-size: 12.5px; border-top: 1px solid var(--line); padding-top: 12px; }
.foot a { color: var(--ink-2); }

@media (max-width: 900px) {
  .body { grid-template-columns: 1fr; }
  .main { border-right: 0; grid-template-rows: 212px 232px auto; }
  .decoded { grid-template-columns: 1fr; min-height: 168px; }
  .timing { border-left: 0; border-top: 1px solid var(--line); }
  .intro { grid-template-columns: 1fr; }
  .facts { grid-auto-flow: row; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .enc-body { grid-template-columns: 1fr; }
  .enc-right { border-left: 0; border-top: 1px solid var(--line); }
  .dl { grid-template-columns: 1fr; }
  .dl .assets { border-left: 0; border-top: 1px solid var(--line); }
  select.ctl { min-width: 180px; }
}
@media (prefers-reduced-motion: reduce) {
  .text .caret { animation: none; }
}

/* ---------- key strip ---------- */
.keystrip .keyhelp { font-size: 12.5px; color: var(--ink-2); }
.keystrip .keyhelp b { color: var(--ink); font-weight: 600; }
.keypad { display: flex; gap: 12px; }
.keycol { display: flex; flex-direction: column; align-items: center; gap: 2px; }
button.rebind {
  font: inherit; font-size: 11px; color: var(--ink-3); background: none; border: 0; padding: 2px 6px;
  cursor: pointer; letter-spacing: 0.02em;
}
button.rebind:hover, button.rebind.armed { color: var(--ink); text-decoration: underline; }
.keystrip .keyhelp.capture { color: var(--trace); }
button.ctl.key.big {
  height: 60px; min-width: 160px; padding: 0 18px; font-size: 16px; font-weight: 600;
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  user-select: none; -webkit-user-select: none; touch-action: none; border-width: 2px;
}
button.ctl.key.big small { font-size: 11px; font-weight: 400; color: var(--ink-3); letter-spacing: 0.04em; }
button.ctl.key.big.down { background: var(--trace); border-color: var(--trace); color: #fff; }
button.ctl.key.big.down small { color: rgba(255, 255, 255, 0.85); }
.sentrow { align-items: center; }
.k-label { font-size: 12px; color: var(--ink-2); letter-spacing: 0.04em; text-transform: uppercase; }
.enc-out.sent { flex: 1 1 200px; min-height: 30px; font-size: 16px; }

/* ---------- reference chart ---------- */
.reference header .ctl { height: 24px; font-size: 12px; text-transform: none; letter-spacing: 0; padding: 0 10px; }
.refbody { padding: 8px 14px 14px; display: grid; gap: 10px; }
.refgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 4px 10px; }
.refcell {
  display: grid; grid-template-columns: 1.3em 1fr; align-items: baseline; gap: 8px; padding: 3px 8px;
  border: 1px solid transparent; border-radius: 4px; background: none; font: inherit; color: var(--ink); text-align: left; cursor: pointer;
}
.refcell:hover { border-color: var(--line); background: var(--panel-2); }
.refcell .ch { font-weight: 600; font-size: 14px; }
.refcell .code { font-size: 14px; letter-spacing: 0.12em; color: var(--ink-2); }
.refcell.prefix { background: var(--panel-2); border-color: var(--line); }
.refcell.match { background: var(--trace-fill); border-color: var(--trace); }
.refcell.match .code { color: var(--ink); }
.refnote { font-size: 12px; color: var(--ink-3); }

/* ---------- practice strip ---------- */
.pr-target { font-size: 30px; font-weight: 600; letter-spacing: 0.18em; color: var(--ink); padding: 4px 0; min-height: 44px; }
.pr-target.done { color: var(--good); }
.pr-result { font-size: 13px; color: var(--ink-2); min-height: 18px; }
.pr-result.good { color: var(--good); font-weight: 600; }
.pr-result.bad { color: var(--on); }