/* SEÑAL — chrome compartido de transmisión */
:root{
  --void:#07070a;
  --cathode:#161208;
  --bone:#e8e3d6;
  --bone-dim:#97917f;
  --amber:#dba74e;
  --amber-deep:#6e4f1c;
  --bleed-r:#ff2d3b;
  --bleed-c:#1fd6ff;
  --rec:#e0463c;
  --bleed:1.4px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;background:var(--void);overflow:hidden}
body{
  font-family:'VT323',monospace;color:var(--bone);
  display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 90% at 50% 42%, var(--cathode) 0%, #0a0a0d 38%, var(--void) 78%);
}
body.scroll{overflow:auto;height:auto;min-height:100%}

/* ---------- pantalla de encendido ---------- */
.power{
  position:fixed;inset:0;z-index:30;background:#020203;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:26px;
  padding:20px;text-align:center;transition:opacity .6s ease;
}
.power.off{opacity:0;pointer-events:none}
.power .hint{color:var(--bone-dim);letter-spacing:.34em;font-size:14px;text-transform:uppercase}
.power button{
  font-family:'VT323',monospace;background:transparent;color:var(--amber);
  border:1px solid var(--amber-deep);padding:14px 40px;letter-spacing:.4em;
  text-transform:uppercase;font-size:20px;cursor:pointer;transition:.18s;
}
.power button:hover,.power button:focus-visible{background:var(--amber);color:#020203;outline:none}
.power button:focus-visible{box-shadow:0 0 0 2px var(--bone)}

/* línea de encendido del CRT */
.turnon{position:fixed;inset:0;z-index:25;pointer-events:none;display:none;background:#020203}
.turnon.go{display:block;animation:turnon .9s ease forwards}
.turnon::after{
  content:"";position:absolute;left:0;right:0;top:50%;height:3px;background:var(--bone);
  box-shadow:0 0 24px 8px rgba(216,210,196,.7);transform:translateY(-50%) scaleX(1);
  animation:scanopen .9s ease forwards;
}
@keyframes turnon{0%{opacity:1}70%{opacity:1}100%{opacity:0}}
@keyframes scanopen{
  0%{transform:translateY(-50%) scaleX(.02);height:3px;opacity:0}
  18%{transform:translateY(-50%) scaleX(1);opacity:1}
  60%{height:3px}
  100%{height:100vh;opacity:0}
}

/* ---------- el tubo ---------- */
.tube{
  position:relative;width:min(900px,94vw);height:min(620px,90vh);
  padding:clamp(18px,5vw,56px);display:flex;flex-direction:column;overflow:hidden;
  border-radius:8px / 18px;opacity:0;transition:opacity .8s ease .5s;
  box-shadow:inset 0 0 120px 30px rgba(0,0,0,.9),inset 0 0 18px rgba(201,146,60,.06),0 0 80px rgba(0,0,0,.8);
  animation:breathe 6.5s ease-in-out infinite;
}
.tube.on{opacity:1}
@keyframes breathe{0%,100%{filter:brightness(1)}47%{filter:brightness(1.04)}50%{filter:brightness(.93)}53%{filter:brightness(1.04)}}
.tube::before{
  content:"";position:absolute;inset:0;z-index:6;pointer-events:none;mix-blend-mode:multiply;
  background:repeating-linear-gradient(to bottom,rgba(0,0,0,0) 0,rgba(0,0,0,0) 2px,rgba(0,0,0,.28) 3px,rgba(0,0,0,.28) 4px);
}
.tube::after{
  content:"";position:absolute;inset:-2px;z-index:7;pointer-events:none;
  background:radial-gradient(120% 110% at 50% 50%, transparent 55%, rgba(0,0,0,.75) 100%);
}
.grain{
  position:absolute;inset:0;z-index:5;pointer-events:none;opacity:.06;
  background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  animation:grain .28s steps(3) infinite;
}
@keyframes grain{0%{transform:translate(0,0)}33%{transform:translate(-4px,3px)}66%{transform:translate(3px,-2px)}}
.track{
  position:absolute;left:0;right:0;height:46px;z-index:8;pointer-events:none;top:-60px;
  background:linear-gradient(rgba(216,210,196,.05),rgba(216,210,196,.16),rgba(216,210,196,.05));
  mix-blend-mode:screen;filter:blur(.5px);
}
.track.go{animation:track 1.1s linear}
@keyframes track{from{top:-60px}to{top:110%}}
.tube.roll{animation:breathe 6.5s ease-in-out infinite, roll .5s linear}
@keyframes roll{0%{transform:translateY(0)}40%{transform:translateY(-14px)}41%{transform:translateY(16px)}100%{transform:translateY(0)}}

/* lienzo de estática dentro del tubo */
.snow{position:absolute;inset:0;z-index:4;pointer-events:none;width:100%;height:100%;opacity:var(--snow,0)}

.head{
  display:flex;justify-content:space-between;align-items:baseline;gap:10px;
  border-bottom:1px solid var(--amber-deep);padding-bottom:8px;letter-spacing:.18em;
  font-size:clamp(12px,1.6vw,16px);color:var(--amber);text-transform:uppercase;
  position:relative;z-index:9;flex-wrap:wrap;
}
.head .right{display:flex;gap:16px;align-items:center;color:var(--bone-dim)}
.rec{display:inline-flex;align-items:center;gap:7px;color:var(--rec)}
.rec .dot{width:9px;height:9px;border-radius:50%;background:var(--rec);box-shadow:0 0 8px var(--rec);animation:blink 1.1s steps(1) infinite}

.tbody{flex:1;display:flex;flex-direction:column;justify-content:center;gap:18px;position:relative;z-index:9;min-height:0}
.label{font-size:clamp(12px,1.5vw,15px);letter-spacing:.34em;color:var(--amber);text-transform:uppercase;opacity:.85;min-height:1.4em}
.msg{
  font-family:'Spectral',serif;font-size:clamp(20px,3.6vw,40px);line-height:1.32;
  color:var(--bone);max-width:34ch;
  text-shadow:calc(var(--bleed)*-1) 0 0 var(--bleed-r),var(--bleed) 0 0 var(--bleed-c);
  animation:drift 5s ease-in-out infinite;
}
@keyframes drift{0%,100%{text-shadow:calc(var(--bleed)*-1) 0 var(--bleed-r),var(--bleed) 0 var(--bleed-c)}50%{text-shadow:calc(var(--bleed)*-1.9) 0 var(--bleed-r),calc(var(--bleed)*1.9) 0 var(--bleed-c)}}
.msg .cursor{display:inline-block;width:.55ch;height:1em;background:var(--bone);vertical-align:-2px;margin-left:2px;animation:blink 1s steps(1) infinite;text-shadow:none}
@keyframes blink{50%{opacity:0}}

.foot{
  display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;
  border-top:1px solid var(--amber-deep);padding-top:10px;
  font-size:clamp(12px,1.5vw,15px);letter-spacing:.16em;color:var(--bone-dim);
  position:relative;z-index:9;
}
.foot .left{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.btn{
  font-family:'VT323',monospace;background:transparent;color:var(--amber);
  border:1px solid var(--amber-deep);padding:6px 16px;letter-spacing:.24em;
  text-transform:uppercase;font-size:clamp(12px,1.6vw,15px);cursor:pointer;transition:.15s;
  text-decoration:none;display:inline-block;
}
.btn:hover,.btn:focus-visible{background:var(--amber);color:var(--void);outline:none}
.btn:focus-visible{box-shadow:0 0 0 2px var(--bone)}
.btn[disabled]{opacity:.35;cursor:default}
.btn.dim{color:var(--bone-dim)}
.btn.dim:hover,.btn.dim:focus-visible{background:transparent;color:var(--amber)}

.glitch{animation:shudder .14s steps(2) 3}
@keyframes shudder{0%{transform:translate(0,0)}25%{transform:translate(3px,-2px) skewX(-1.5deg)}50%{transform:translate(-2px,1px)}75%{transform:translate(2px,2px) skewX(1deg)}}
.invert{filter:invert(1) hue-rotate(180deg)}

/* ---------- guía de canales (index) ---------- */
.guide{flex:1;display:flex;flex-direction:column;gap:10px;position:relative;z-index:9;overflow-y:auto;padding:14px 2px;min-height:0;scrollbar-width:thin}
.chan{
  display:grid;grid-template-columns:3.2ch 1fr auto;gap:8px 14px;align-items:center;
  border:1px solid rgba(110,79,28,.55);padding:10px 14px;text-decoration:none;color:var(--bone);
  transition:border-color .2s, background .2s;position:relative;
}
a.chan:hover,a.chan:focus-visible{border-color:var(--amber);background:rgba(201,146,60,.06);outline:none}
.chan .num{font-size:clamp(22px,3vw,30px);color:var(--amber);letter-spacing:.06em}
.chan .info{display:flex;flex-direction:column;gap:2px;min-width:0}
.chan .name{letter-spacing:.22em;text-transform:uppercase;font-size:clamp(13px,1.8vw,16px)}
.chan .sched{color:var(--bone-dim);font-size:clamp(11px,1.5vw,13px);letter-spacing:.12em}
.chan .meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.chan .state{font-size:clamp(11px,1.5vw,13px);letter-spacing:.22em;text-transform:uppercase}
.chan.live .state{color:var(--amber)}
.chan.dead{opacity:.62}
.chan.dead .num,.chan.dead .name{color:var(--bone-dim)}
.chan.dead .state{color:var(--bone-dim)}
.chan.seen::after{content:"✓";position:absolute;top:4px;right:6px;color:var(--amber-deep);font-size:13px}
.chan.ghost{border-style:dashed;opacity:.4}
.chan.ghost .num{color:var(--amber-deep)}

/* barras de señal */
.bars{display:inline-flex;gap:3px;align-items:flex-end;height:16px}
.bars i{width:4px;background:var(--amber-deep)}
.bars i:nth-child(1){height:25%}
.bars i:nth-child(2){height:45%}
.bars i:nth-child(3){height:65%}
.bars i:nth-child(4){height:85%}
.bars i:nth-child(5){height:100%}
.bars[data-s="0"] i{background:#2a2418}
.bars[data-s="1"] i:nth-child(-n+1),.bars[data-s="2"] i:nth-child(-n+2),
.bars[data-s="3"] i:nth-child(-n+3),.bars[data-s="4"] i:nth-child(-n+4),
.bars[data-s="5"] i{background:var(--amber)}
.bars.flick i:first-child{animation:barflick 1.7s steps(2) infinite}
@keyframes barflick{0%,70%{background:var(--amber-deep)}85%{background:#2a2418}}

/* ---------- canal bloqueado ---------- */
.locked{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:20px;position:relative;z-index:9;text-align:center;padding:10px;
  background:radial-gradient(62% 64% at 50% 50%, rgba(2,2,3,.82) 0%, rgba(2,2,3,.55) 55%, transparent 100%);
}
.locked .nosig{letter-spacing:.4em;font-size:clamp(15px,2.2vw,20px);color:var(--bone);text-transform:uppercase;text-shadow:calc(var(--bleed)*-1) 0 var(--bleed-r),var(--bleed) 0 var(--bleed-c)}
.locked .pista{font-family:'Spectral',serif;font-style:italic;font-size:clamp(15px,2.4vw,21px);color:var(--bone-dim);max-width:34ch;line-height:1.5}

/* ---------- carta de ajuste (canal 4) ---------- */
.carta{flex:1;display:flex;flex-direction:column;position:relative;z-index:9;gap:0;min-height:0}
.carta .franjas{flex:1;display:flex;min-height:0}
.carta .franjas i{flex:1}
.carta .escala{height:18%;display:flex}
.carta .escala i{flex:1}
.carta .finetext{padding:8px 4px 0;font-size:11px;letter-spacing:.3em;color:#3a3322;text-transform:uppercase;text-align:center;transition:color 1.2s}
.carta .finetext.wake{color:var(--amber)}

/* ---------- entrada de frase (canal 7) ---------- */
.phrase{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.phrase input{
  font-family:'VT323',monospace;background:rgba(0,0,0,.5);color:var(--bone);
  border:1px solid var(--amber-deep);padding:10px 14px;letter-spacing:.18em;
  font-size:clamp(15px,2vw,19px);min-width:0;flex:1;text-transform:uppercase;
}
.phrase input:focus-visible{outline:none;border-color:var(--amber);box-shadow:0 0 0 2px rgba(201,146,60,.3)}

/* ---------- código de transmisión (index) ---------- */
.freq{
  display:flex;gap:8px 12px;align-items:center;flex-wrap:wrap;position:relative;z-index:9;
  border:1px solid rgba(110,79,28,.55);background:rgba(201,146,60,.04);
  padding:8px 12px;margin-bottom:10px;font-size:clamp(12px,1.6vw,14px);letter-spacing:.1em;
}
.freq .lbl{color:var(--bone-dim);text-transform:uppercase;letter-spacing:.22em;font-size:.86em}
.freq .code{color:var(--amber);letter-spacing:.26em;font-size:clamp(15px,2.2vw,19px)}
.freq .spacer{flex:1}
.freq button{font-size:11px;padding:4px 10px}
.freqin{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:-2px 0 10px}
.freqin[hidden]{display:none}
.freqin input{
  font-family:'VT323',monospace;background:rgba(0,0,0,.5);color:var(--bone);
  border:1px solid var(--amber-deep);padding:8px 12px;letter-spacing:.2em;
  font-size:clamp(14px,1.9vw,17px);text-transform:uppercase;min-width:0;flex:1;
}
.freqin input:focus-visible{outline:none;border-color:var(--amber);box-shadow:0 0 0 2px rgba(201,146,60,.3)}
.freqin .note{width:100%;color:var(--bone-dim);font-size:11px;letter-spacing:.08em}
.freqin .note.bad{color:var(--rec)}

/* apagado final */
.dieline{position:fixed;inset:0;z-index:40;background:#020203;display:none;align-items:center;justify-content:center}
.dieline.go{display:flex}
.dieline::before{content:"";position:absolute;left:0;right:0;top:50%;height:2px;background:var(--bone);box-shadow:0 0 18px 6px rgba(216,210,196,.6);animation:dieline 1.6s ease forwards}
@keyframes dieline{0%{transform:scaleX(1);opacity:1}60%{transform:scaleX(1);opacity:1}100%{transform:scaleX(.001);opacity:0}}
.dieline .last{
  font-family:'Spectral',serif;font-size:clamp(17px,2.6vw,26px);color:var(--bone);
  max-width:36ch;line-height:1.6;text-align:center;padding:24px;opacity:0;
  animation:lastline 3s ease 2.2s forwards;
}
@keyframes lastline{to{opacity:.92}}

/* ---------- aviso discreto (index) ---------- */
.aviso{
  position:fixed;left:50%;bottom:14px;transform:translateX(-50%);z-index:20;
  display:flex;gap:10px;align-items:center;
  background:rgba(2,2,3,.85);border:1px solid var(--amber-deep);
  color:var(--bone-dim);font-size:13px;letter-spacing:.14em;
  padding:7px 8px 7px 14px;max-width:92vw;text-align:center;
}
.aviso button{background:none;border:0;color:var(--bone-dim);font-family:inherit;font-size:17px;cursor:pointer;padding:0 6px;line-height:1}
.aviso button:hover,.aviso button:focus-visible{color:var(--amber);outline:none}

/* ---------- página de pruebas ---------- */
.testwrap{width:min(980px,96vw);margin:30px auto;padding:20px;font-size:16px}
.testwrap h1{color:var(--amber);letter-spacing:.2em;font-size:24px;text-transform:uppercase;margin-bottom:6px}
.testwrap p{color:var(--bone-dim);margin-bottom:18px}
.testwrap table{width:100%;border-collapse:collapse;margin-bottom:24px}
.testwrap th,.testwrap td{border:1px solid var(--amber-deep);padding:6px 10px;text-align:left;letter-spacing:.06em}
.testwrap th{color:var(--amber);text-transform:uppercase;font-size:13px;letter-spacing:.2em}
.testwrap .pass{color:#7dc97d}
.testwrap .fail{color:var(--rec);font-weight:bold}
.testwrap .summary{font-size:20px;letter-spacing:.2em;text-transform:uppercase;padding:12px 0}

@media (max-width:480px){
  .tube{height:min(640px,92vh);width:96vw}
  .chan{grid-template-columns:2.6ch 1fr auto;padding:8px 10px}
  .head{font-size:11px}
  .msg{font-size:19px}
}

@media (prefers-reduced-motion: reduce){
  .tube,.msg,.grain,.track,.turnon,.turnon::after,.bars.flick i:first-child,
  .dieline::before,.tube.roll,.glitch{animation:none!important}
  .msg .cursor,.rec .dot{animation:none}
  .tube{opacity:1;transition:none}
  .power{transition:none}
  .dieline .last{animation:none;opacity:.92}
}