:root {
  color-scheme: dark;
  --black: #050709;
  --slate-0: #080b0e;
  --slate-1: #0c1115;
  --line: #26343b;
  --text: #dce5e8;
  --muted: #728087;
  --cyan: #56f0e2;
  --cyan-dim: #159eaa;
  --amber: #ffc864;
  --danger: #ff6b64;
  --mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--black); color: var(--text); font-family: var(--sans); }
body {
  min-height: 100svh;
  background: radial-gradient(1100px 460px at 50% -100px, #142129 0%, transparent 68%), linear-gradient(180deg, #080b0d, #050607 72%);
}
button { font: inherit; }

.radio {
  width: min(100%, 1120px);
  min-height: 100svh;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
  background: linear-gradient(90deg, rgba(255,255,255,.012), transparent 20%, transparent 80%, rgba(255,255,255,.01)), var(--slate-0);
  border-left: 1px solid #11181c;
  border-right: 1px solid #11181c;
  box-shadow: 0 0 90px rgba(0,0,0,.45);
}

.topline {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #10171b, #0a0e11);
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }
.brand-mark {
  width: 24px;
  height: 30px;
  position: relative;
  border-left: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  clip-path: polygon(42% 0,58% 0,100% 100%,0 100%);
  filter: drop-shadow(0 0 7px rgba(86,240,226,.35));
}
.brand-mark::before, .brand-mark::after {
  content: "";
  position: absolute;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--cyan-dim);
  border-radius: 50%;
}
.brand-mark::before { right: 11px; border-right-color: transparent; border-bottom-color: transparent; transform: rotate(-45deg); }
.brand-mark::after { left: 11px; border-left-color: transparent; border-top-color: transparent; transform: rotate(-45deg); }
.brand b { display: block; font-size: 15px; letter-spacing: .16em; font-weight: 800; }
.brand small { display: block; margin-top: 3px; color: var(--cyan-dim); font: 700 8px/1 var(--mono); letter-spacing: .18em; }
.tagline { color: var(--muted); font-size: 11px; letter-spacing: .08em; }

.readout {
  padding: 20px 18px 16px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(86,240,226,.035), transparent 42%), linear-gradient(180deg, #0b1013, #080c0e);
}
.readout-meta, .readout-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font: 700 9px/1 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}
.eyebrow { color: var(--cyan-dim); }
.frequency { display: flex; align-items: baseline; justify-content: center; gap: 11px; padding: 10px 0 12px; font-variant-numeric: tabular-nums; }
.frequency span {
  color: var(--amber);
  font: 600 clamp(64px, 15vw, 128px)/.82 "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
  letter-spacing: -.045em;
  text-shadow: 0 0 28px rgba(255,200,100,.08);
}
.frequency em { color: #9a875e; font: 800 11px/1 var(--mono); letter-spacing: .16em; font-style: normal; }
.mode { color: var(--cyan); padding: 3px 7px; border-left: 2px solid var(--cyan); background: rgba(86,240,226,.055); }

.scope-shell { position: relative; background: #030506; }
.scope-status {
  min-height: 31px;
  display: flex;
  align-items: center;
  gap: 17px;
  padding: 0 12px;
  border-bottom: 1px solid #1c292f;
  background: #070b0d;
  color: #66757b;
  font: 800 8px/1 var(--mono);
  letter-spacing: .13em;
}
.scope-status span { display: inline-flex; align-items: center; gap: 6px; }
.scope-status span:last-child { margin-left: auto; color: #4f6067; }
.scope-status i { width: 5px; height: 5px; display: inline-block; border-radius: 50%; background: #2a3438; }
.scope-status i.live { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.scope { position: relative; overflow: hidden; background: #020405; border-bottom: 1px solid #1e2a30; }
#rfCanvas { display: block; width: 100%; height: auto; aspect-ratio: 1024 / 540; background: #020405; }
.tune-cursor {
  position: absolute;
  inset: 0 auto 0 50%;
  width: 1px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,200,100,.94), rgba(255,200,100,.55) 38%, rgba(255,200,100,.26));
  box-shadow: 0 0 7px rgba(255,200,100,.35);
}
.tune-cursor span {
  position: absolute;
  top: 0;
  left: -6px;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 9px solid var(--amber);
}
.scope-message {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 8px;
  padding: 24px;
  background: radial-gradient(circle at center, rgba(9,18,21,.78), rgba(2,4,5,.92) 60%);
}
.scope-message.hidden { display: none; }
.scope-message strong { color: #a9b5b9; font: 900 13px/1 var(--mono); letter-spacing: .24em; }
.scope-message span { color: #5e6d73; font-size: 12px; }
.scope-message.error strong { color: var(--danger); }
.scope-message.error span { color: #a17b79; }

.scale-footer {
  height: 31px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 12px;
  color: #65757c;
  background: #070a0c;
  border-bottom: 1px solid var(--line);
  font: 700 9px/1 var(--mono);
  font-variant-numeric: tabular-nums;
}
.scale-footer span:last-child { text-align: right; }
.scale-footer .center-mark { color: #8e9da2; letter-spacing: .08em; }

.lower-deck {
  min-height: 100px;
  display: grid;
  grid-template-columns: minmax(260px, 1.5fr) auto auto;
  align-items: center;
  gap: 24px;
  padding: 15px 18px;
  background: linear-gradient(180deg, #10171a, #0a0e10);
  border-bottom: 1px solid #1f2a2f;
}
.signal-label { display: flex; justify-content: space-between; margin-bottom: 7px; color: #718087; font: 800 8px/1 var(--mono); letter-spacing: .13em; }
.signal-label b { color: #aab5b8; font-variant-numeric: tabular-nums; }
.signal-track { height: 9px; overflow: hidden; background: repeating-linear-gradient(90deg, #1c272c 0 7px, transparent 7px 10px); }
.signal-track i { display: block; width: 0; height: 100%; background: repeating-linear-gradient(90deg, var(--cyan) 0 7px, transparent 7px 10px); transition: width .12s linear; }
.signal-scale { display: flex; justify-content: space-between; margin-top: 5px; color: #45545a; font: 700 7px/1 var(--mono); }
.telemetry { display: flex; gap: 15px; color: #53636a; font: 800 8px/1 var(--mono); letter-spacing: .08em; white-space: nowrap; }
.telemetry b { color: #9ba9ad; font-weight: 800; font-variant-numeric: tabular-nums; }
.controls { display: flex; align-items: center; gap: 10px; }
.mute, .power { appearance: none; min-height: 44px; border-radius: 0; cursor: pointer; font: 900 9px/1 var(--mono); letter-spacing: .12em; }
.mute { min-width: 68px; border: 1px solid #29363c; background: #0b1012; color: #77858a; }
.mute[aria-pressed="true"] { color: var(--amber); border-color: #685831; }
.power {
  min-width: 104px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 9px;
  border: 1px solid #31515a;
  background: linear-gradient(180deg, #132126, #0b1215);
  color: #a5b4b8;
}
.power i { width: 10px; height: 10px; border: 1px solid #52636a; border-radius: 50%; box-shadow: inset 0 0 0 3px #0d1417; }
.power[aria-pressed="true"] { color: var(--cyan); border-color: #2d7479; }
.power[aria-pressed="true"] i { border-color: var(--cyan); background: var(--cyan); box-shadow: 0 0 12px rgba(86,240,226,.55); }
.power:disabled { opacity: .55; cursor: wait; }
.bench-note { padding: 10px 18px 12px; color: #405057; background: #070a0c; text-align: center; font: 800 7px/1 var(--mono); letter-spacing: .18em; }

@media (max-width: 680px) {
  .topline { min-height: 58px; padding-inline: 12px; }
  .tagline { display: none; }
  .readout { padding: 15px 12px 13px; }
  .readout-meta { font-size: 7px; }
  .frequency { gap: 7px; padding: 9px 0 11px; }
  .frequency span { font-size: clamp(62px, 21vw, 92px); }
  .readout-foot { font-size: 7px; }
  .lower-deck { grid-template-columns: 1fr auto; gap: 14px; padding: 13px 12px; }
  .telemetry { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; border-top: 1px solid #1e292e; padding-top: 9px; }
  .mute { display: none; }
  .scope-status { padding-inline: 9px; }
  .scale-footer { font-size: 7px; padding-inline: 8px; }
  .bench-note { letter-spacing: .12em; }
}

@media (prefers-reduced-motion: reduce) { .signal-track i { transition: none; } }