/* Radio listening demo: controls and readings share the same tuning model. */
.signal-section{scroll-margin-top:20px}
.signal-section .lab-copy h2{font-size:clamp(38px,4.1vw,65px)}
.signal-section .lab-copy p{max-width:385px}
#signal-receiver{min-width:0}
#signal-receiver .receiver-readout{gap:14px;flex-wrap:wrap;padding:18px 18px 12px}
#signal-receiver .receiver-readout strong{font-size:clamp(28px,2.65vw,39px);font-variant-numeric:tabular-nums}
#signal-receiver .mode-switch{gap:3px}
#signal-receiver .mode-switch button{min-height:40px;min-width:36px;padding:7px;font-size:10px;border-radius:3px}
.signal-reference-row{padding:0 18px 13px;display:flex;justify-content:space-between;gap:10px;font:8px/1.7 var(--mono);color:#719a9f;letter-spacing:.025em}
#signal-phase{color:#9cc7bd;text-align:right}
#signal-receiver #signal-canvas{height:228px;touch-action:pan-y;cursor:crosshair}
#signal-receiver .spectrum-scale{font-size:7px;gap:8px}
#signal-receiver .tuning{gap:14px}
#signal-receiver input[type=range]{cursor:pointer;accent-color:var(--mint)}
#signal-receiver .tuning input{height:20px;background:linear-gradient(#325d5d,#325d5d) center/100% 3px no-repeat}
.signal-reception-row{display:flex;justify-content:space-between;align-items:center;gap:22px;margin-top:15px}
.signal-meter{display:flex;align-items:center;gap:9px;min-width:0;flex:1}
.signal-meter label{font:7px var(--mono);letter-spacing:.08em;color:#829fa5}
.signal-meter meter{appearance:none;-webkit-appearance:none;min-width:40px;width:100%;max-width:140px;height:5px;border:0;border-radius:1px;background:#20383e;overflow:hidden}
.signal-meter meter::-webkit-meter-bar{background:#20383e;border:0;border-radius:1px}
.signal-meter meter::-webkit-meter-optimum-value{background:linear-gradient(90deg,#4a9e98,#a4ffe0);border-radius:1px}
.signal-meter meter::-moz-meter-bar{background:linear-gradient(90deg,#4a9e98,#a4ffe0)}
.signal-meter output{width:35px;flex:none;color:var(--mint);font:9px var(--mono);text-align:right}
.signal-centre{display:flex;align-items:center;gap:10px;min-height:36px;border:1px solid #51756f55;border-radius:3px;padding:6px 10px;font:8px var(--mono);color:#bfd4ce;white-space:nowrap}
.signal-centre:hover{border-color:var(--mint);color:var(--mint)}.signal-centre>span[aria-hidden]{font-size:18px;line-height:1}
.signal-tuning-hint{margin-top:10px;min-height:29px;font:8px/1.9 var(--mono);color:#829eaa}
.receiver-audio-row{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:15px;padding:16px 0;border-block:1px solid #688b8a26}
#signal-receiver .signal-audio-button{min-height:42px;min-width:140px;justify-content:center;border:1px solid #5a847f6b;border-radius:3px;padding:10px 13px;gap:9px;color:#b9d5d0;font:10px var(--mono);background:#16342c33}
#signal-receiver .signal-audio-button:hover{border-color:var(--mint);color:var(--mint)}
#signal-receiver .signal-audio-button[aria-pressed=true]{color:var(--mint);border-color:#8bf2d485;background:#183e344f}
.signal-volume{display:flex;align-items:center;gap:9px;flex:1;max-width:230px;min-width:0;font:8px var(--mono);color:#8ba6ac}
.signal-volume input{width:100%;min-width:35px;height:24px;margin:0;background:none}
.signal-volume output{font:8px var(--mono);min-width:29px;text-align:right}
#signal-receiver .receiver-buttons{align-items:center;margin-top:20px}
.signal-decode-note{font:7px/1.8 var(--mono);letter-spacing:.06em;color:#698f96;text-align:right}
#signal-receiver .decode-terminal{min-height:104px;margin-top:17px}
#signal-receiver .decode-terminal pre{font-size:9px;line-height:1.9;white-space:pre-wrap;overflow-wrap:anywhere;min-height:46px}
.signal-source-note{font:7px/1.7 var(--mono);color:#708d97;margin-top:2px}.signal-source-note a{color:#adc2c1;text-decoration:underline;text-underline-offset:3px}
@media(min-width:901px) and (max-width:1150px){#signal-receiver .receiver-readout{align-items:flex-start;gap:13px}#signal-receiver .mode-switch{width:100%}#signal-receiver .mode-switch button{flex:1}.receiver-audio-row{gap:12px}.signal-volume label{display:none}}
@media(max-width:700px){#signal-receiver .receiver-readout{padding:16px 13px 10px;gap:14px}#signal-receiver .receiver-readout strong{font-size:34px}#signal-receiver .mode-switch{width:100%;gap:5px}#signal-receiver .mode-switch button{flex:1;font-size:11px;min-height:40px}.signal-reference-row{padding:0 13px 12px;font-size:7px}#signal-receiver #signal-canvas{height:190px}#signal-receiver .spectrum-scale{font-size:6px}.signal-reception-row{gap:12px}.signal-meter{gap:6px}.signal-meter label{font-size:6px}.signal-meter output{font-size:8px;min-width:30px;width:30px}.signal-centre{gap:6px;padding:5px 8px;font-size:7px}.signal-tuning-hint{font-size:8px;min-height:32px}.receiver-audio-row{gap:12px;flex-wrap:wrap}#signal-receiver .signal-audio-button{font-size:10px;min-width:128px}.signal-volume{gap:7px;min-width:105px}.signal-volume label{display:none}.signal-volume output{font-size:8px}.signal-decode-note{font-size:6px;max-width:100px}#signal-receiver .decode-terminal pre{font-size:8px}.signal-source-note{font-size:6px}}
@media(max-width:380px){#signal-receiver .receiver-readout strong{font-size:30px}.signal-volume{min-width:90px}.signal-reception-row{gap:8px}.signal-centre{font-size:6px}.signal-meter label{display:none}}