:root {
  --bg: #f3efe6;
  --bg-elev: #fffdf8;
  --bg-sink: #e7e0d2;
  --ink: #1b1914;
  --muted: #5e584e;
  --line: #d5ccbc;
  --amber: #8a4b00;
  --amber-soft: #f3ddb8;
  --green: #0f6b3c;
  --green-soft: #d7f0e2;
  --red: #8f1d1d;
  --red-soft: #f8d6d6;
  --blue: #1d3f72;
  --blue-soft: #d9e4f5;
  --focus: #0b57d0;
  --ptt: #b42318;
  --shadow: 0 10px 30px rgba(40, 30, 10, 0.08);
  --mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", "Liberation Mono", monospace;
  --sans: "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
  font-family: var(--sans);
  line-height: 1.5;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12140f;
    --bg-elev: #1c2118;
    --bg-sink: #0e100c;
    --ink: #eee7d8;
    --muted: #c2b8a4;
    --line: #34382c;
    --amber: #f0b429;
    --amber-soft: #3a2d12;
    --green: #8fd6ad;
    --green-soft: #163526;
    --red: #f0b4b4;
    --red-soft: #3c1c1c;
    --blue: #c5d7f5;
    --blue-soft: #1b2838;
    --focus: #9dc1ff;
    --ptt: #e24b4b;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #12140f;
  --bg-elev: #1c2118;
  --bg-sink: #0e100c;
  --ink: #eee7d8;
  --muted: #c2b8a4;
  --line: #34382c;
  --amber: #f0b429;
  --amber-soft: #3a2d12;
  --green: #8fd6ad;
  --green-soft: #163526;
  --red: #f0b4b4;
  --red-soft: #3c1c1c;
  --blue: #c5d7f5;
  --blue-soft: #1b2838;
  --focus: #9dc1ff;
  --ptt: #e24b4b;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

:root[data-theme="light"] {
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 400px at 10% -10%, rgba(240, 180, 41, 0.16), transparent 50%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}
img { max-width: 100%; }
a { color: var(--blue); }
a:hover { text-decoration: none; }

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  background: var(--bg-elev);
  color: var(--ink);
  padding: 0.4rem 0.7rem;
  z-index: 10;
}
.skip-link:focus { top: 0.5rem; }

.faceplate {
  background: var(--bg-sink);
  border-bottom: 1px solid var(--line);
}
.faceplate-row {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
  letter-spacing: 0.04em;
  font-size: 1.25rem;
}
.led {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: #d08a12;
  box-shadow: 0 0 0 3px rgba(208, 138, 18, 0.25);
}
.site-nav { display: flex; gap: 0.25rem; flex-wrap: wrap; flex: 1; }
.nav-link {
  color: var(--ink);
  text-decoration: none;
  padding: 0.4rem 0.65rem;
  border-radius: 999px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-link.is-active { background: var(--amber-soft); color: var(--ink); }
.faceplate-tools { display: flex; gap: 0.4rem; align-items: center; margin-left: auto; }
.who { font-family: var(--mono); font-size: 0.92rem; }
.nav-toggle { display: none; }

main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}
.footer-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}
.footer-links a { color: var(--muted); }

h1, h2, h3 { line-height: 1.2; }
h1 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin: 0.2rem 0 0.6rem; }
.kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
  font-size: 0.78rem;
  margin: 0;
}
.lead { font-size: 1.15rem; max-width: 44rem; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

.grid { display: grid; gap: 0.9rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .panel, .callout {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.05rem;
  box-shadow: var(--shadow);
}
.card h2, .panel h2 { margin-top: 0.2rem; }
.callout { background: var(--amber-soft); box-shadow: none; }
.encourage { border-color: var(--green); }

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  background: var(--bg-sink);
  border: 1px solid var(--line);
}
.pill-now, .pill-ok { background: var(--green-soft); color: var(--green); }
.pill-soon, .pill-warn { background: var(--amber-soft); color: var(--amber); }
.pill-bad { background: var(--red-soft); color: var(--red); }
.pill-info { background: var(--blue-soft); color: var(--blue); }

button, .button, input, select, textarea { font: inherit; }
.button, button {
  background: #1a2744;
  color: #fff;
  border: 0;
  border-radius: 10px;
  min-height: 44px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}
input, select, textarea {
  color: var(--ink);
  background: var(--bg);
}
:root[data-theme="dark"] .button,
:root[data-theme="dark"] button {
  background: #d5deef;
  color: #12140f;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .button,
  :root:not([data-theme="light"]) button {
    background: #d5deef;
    color: #12140f;
  }
}
.button-quiet, button.button-quiet {
  background: transparent !important;
  color: var(--ink) !important;
  border: 1px solid var(--line);
}
.button-danger, button.button-danger { background: #9f1239 !important; color: #fff !important; }
.button-good, button.button-good { background: #0f6b3c !important; color: #fff !important; }
.choice { color: var(--ink); background: var(--bg-elev); }

input, select, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 44px;
  padding: 0.45rem 0.65rem;
}
textarea { min-height: 7rem; resize: vertical; }
label { display: grid; gap: 0.25rem; font-weight: 650; }
.field { display: grid; gap: 0.25rem; }
.form-grid { display: grid; gap: 0.8rem; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.check { display: flex; gap: 0.6rem; align-items: flex-start; font-weight: 500; }
.check input { width: 1.2rem; height: 1.2rem; margin-top: 0.2rem; min-height: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.errors {
  background: var(--red-soft);
  color: var(--red);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
}
.errors ul { margin: 0; padding-left: 1.1rem; }
.ok-note { background: var(--green-soft); color: var(--ink); border-radius: 10px; padding: 0.7rem 0.85rem; }

.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.choice {
  text-align: left;
  background: var(--bg-elev);
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  min-height: 88px;
}
.choice strong { display: block; font-size: 1.15rem; }
.choice.is-selected { border-color: var(--amber); background: var(--amber-soft); }

.banner-draft {
  background: var(--amber-soft);
  border: 1px solid var(--amber);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  margin-bottom: 1rem;
}
.prose { max-width: 44rem; }
.prose h2 { margin-top: 1.6rem; }
.prose ul { padding-left: 1.2rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.45rem 0.4rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.82rem; color: var(--muted); }
.table-wrap { overflow-x: auto; }

.tabs { display: flex; gap: 0.35rem; flex-wrap: wrap; margin: 0.5rem 0 1rem; }
.tabs button[aria-selected="true"] { background: var(--amber); color: #1b1304; }
.tabs button { background: transparent; color: var(--ink); border: 1px solid var(--line); }

.freq {
  font-family: var(--mono);
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: 0.06em;
  color: var(--amber);
  margin: 0;
}
.talker {
  font-family: var(--mono);
  font-size: clamp(2rem, 5vw, 3.4rem);
  margin: 0.2rem 0;
  min-height: 1.2em;
}
.channel-top { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: end; }
.dtmf-pad { display: grid; grid-template-columns: repeat(4, minmax(2.6rem, 1fr)); gap: 0.35rem; max-width: 22rem; margin: 0.6rem 0; }
.dtmf-pad button { min-height: 2.7rem; font-variant-numeric: tabular-nums; }
.dtmf-card { margin: 1rem 0; }
.ptt-wrap { display: grid; justify-items: center; gap: 0.6rem; margin: 1rem 0; }
button.ptt {
  width: min(46vw, 220px);
  height: min(46vw, 220px);
  border-radius: 50%;
  background: var(--ptt) !important;
  color: #fff !important;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  border: 6px solid #3a0d0d;
  touch-action: none;
  user-select: none;
}
button.ptt:disabled { background: #6d6760 !important; border-color: #3a3834; cursor: not-allowed; }
button.ptt.is-tx { background: #7a1212 !important; box-shadow: 0 0 0 8px rgba(180, 35, 24, 0.25); }
button.choice {
  background: var(--bg-elev) !important;
  color: var(--ink) !important;
  border: 2px solid var(--line);
}
.tabs button {
  background: transparent !important;
  color: var(--ink) !important;
  border: 1px solid var(--line);
}
.tabs button[aria-selected="true"] {
  background: var(--amber) !important;
  color: #1b1304 !important;
}
.chip {
  font-family: var(--mono);
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  background: var(--bg-sink);
  border: 1px solid var(--line);
}
.chip-tx { background: var(--red-soft); color: var(--red); }
.chip-rx { background: var(--green-soft); color: var(--green); }
.chip-busy { background: var(--amber-soft); color: var(--amber); }
.split { display: grid; grid-template-columns: 1fr 1.3fr; gap: 1rem; }
.chat-log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 320px;
  overflow: auto;
  display: grid;
  gap: 0.45rem;
}
.chat-log li { background: var(--bg-sink); border-radius: 8px; padding: 0.4rem 0.55rem; }
.roster { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.roster li { display: flex; justify-content: space-between; gap: 0.5rem; border-bottom: 1px solid var(--line); padding: 0.3rem 0; }

.side-by-side { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
pre.json {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-sink);
  padding: 0.7rem;
  border-radius: 8px;
  max-height: 240px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0; }
.status-row { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.key-once { font-family: var(--mono); word-break: break-all; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

@media (max-width: 800px) {
  .grid-2, .grid-3, .split, .side-by-side, .choice-grid, .row-2 { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; width: 100%; flex-basis: 100%; }
  .site-nav.is-open { display: flex; flex-direction: column; }
  .faceplate-tools { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .led { box-shadow: none; }
}

@media print {
  .faceplate, .site-footer, .button, button { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .panel { box-shadow: none; }
}