/* Carlos Computer Club — variante TUBE (CRT phosphor)
 * Moniteur cathodique physique. Scanlines fines, sweep, phosphore cyan. */

:root {
  --tb-bg: #02050a;
  --tb-phosphor: #eafcff;
  --tb-glow: #5af2ff;
  --tb-glow2: #ff5bd1;
  --tb-amber: #ffbb44;
  --tb-dim: rgba(234,252,255,0.62);
}

body[data-variant="tube"] {
  background: var(--tb-bg);
  color: var(--tb-phosphor);
  font-family: 'Orbitron', 'JetBrains Mono', monospace;
  overflow: hidden;
}

.tb-shell {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  padding: max(env(safe-area-inset-top, 0px), 12px) 18px max(env(safe-area-inset-bottom, 0px), 14px);
  z-index: 1;
}

/* ─── Overlays CRT (scanlines fines, vignette, sweep) ─────────── */
.tb-scanlines {
  position: fixed; inset: 0; z-index: 8;
  pointer-events: none;
  background: repeating-linear-gradient(0deg,
    rgba(0,0,0,0.18) 0,
    rgba(0,0,0,0.18) 1px,
    transparent 1px,
    transparent 4px);
}
.tb-vignette {
  position: fixed; inset: 0; z-index: 6;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 50%, transparent 65%, rgba(0,0,0,0.55) 100%);
}
.tb-sweep {
  position: fixed; left: 0; right: 0;
  height: 80px; top: -80px; z-index: 9;
  background: linear-gradient(180deg, transparent, rgba(90,242,255,0.10), transparent);
  pointer-events: none;
  animation: cccSweep 7s linear infinite;
}

/* ─── Channel tag (header) ────────────────────────────────────── */
.tb-channel {
  display: flex; justify-content: space-between; align-items: center;
  font: 11px 'JetBrains Mono', monospace;
  letter-spacing: 0.32em;
  color: var(--tb-dim);
  text-transform: uppercase;
}
.tb-rec {
  color: var(--tb-amber);
  display: inline-flex; align-items: center; gap: 6px;
  text-shadow: 0 0 12px var(--tb-amber), 0 0 6px var(--tb-amber);
  animation: cccPhosphor 2s ease-in-out infinite;
}
.tb-rec .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--tb-amber);
  box-shadow: 0 0 14px var(--tb-amber), 0 0 4px var(--tb-amber);
  animation: cccBreath 1.3s ease-in-out infinite;
}

/* ─── Wordmark ────────────────────────────────────────────────── */
.tb-wordmark {
  margin-top: 18px;
  text-align: center;
  font: 900 30px/0.95 'Orbitron', monospace;
  letter-spacing: 0.08em;
  color: var(--tb-phosphor);
  text-shadow: 0 0 16px var(--tb-glow), 0 0 36px rgba(90,242,255,0.53);
  animation: cccTBJitter 7s infinite;
}
/* RGB-shift chromatic */
.tb-rgb { position: relative; display: inline-block; }
.tb-rgb .l1, .tb-rgb .l2 {
  position: absolute; inset: 0;
  mix-blend-mode: screen; pointer-events: none;
}
.tb-rgb .l1 { color: #ff003c; transform: translateX(-1.6px); }
.tb-rgb .l2 { color: #00f0ff; transform: translateX(1.6px); }

.tb-subtitle {
  margin-top: 12px;
  text-align: center;
  font: 11px 'JetBrains Mono', monospace;
  letter-spacing: 0.3em;
  color: var(--tb-dim);
  text-transform: uppercase;
}

/* ─── Input zone ──────────────────────────────────────────────── */
.tb-input-zone {
  margin-top: 14px;
  flex: 1; min-height: 0;
  display: flex; flex-direction: column;
}
.tb-input-head {
  display: flex; justify-content: space-between; align-items: center;
  font: 11px 'JetBrains Mono', monospace;
  letter-spacing: 0.22em;
  color: var(--tb-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.tb-input-head .right {
  display: inline-flex; align-items: center; gap: 10px;
}
.tb-counter.warn { color: var(--tb-amber); }

/* Clear × button — amber circle, only visible when text > 0 */
.tb-clear {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid var(--tb-amber);
  background: transparent;
  color: var(--tb-amber);
  font: 700 11px 'JetBrains Mono', monospace;
  letter-spacing: 0;
  display: none;
  align-items: center; justify-content: center;
  text-shadow: 0 0 8px var(--tb-amber);
  box-shadow: inset 0 0 8px -4px var(--tb-amber), 0 0 8px -4px var(--tb-amber);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}
.tb-clear.show { display: inline-flex; }

.tb-input-frame {
  position: relative;
  flex: 1; min-height: 0;
  border: 1.5px solid var(--tb-glow);
  background: rgba(90,242,255,0.06);
  padding: 12px 14px;
  display: flex; flex-direction: column;
  box-shadow: inset 0 0 28px rgba(90,242,255,0.16), 0 0 16px -6px var(--tb-glow);
  overflow: visible; /* allow fly/flap overlays to escape */
}
.tb-input-frame.warn {
  border-color: var(--tb-amber);
  box-shadow: inset 0 0 28px rgba(255,187,68,0.2), 0 0 16px -6px var(--tb-amber);
}
.tb-input {
  flex: 1;
  background: transparent;
  border: none; outline: none; resize: none;
  color: var(--tb-phosphor);
  font: 14px/1.42 'JetBrains Mono', monospace;
  letter-spacing: 0.01em;
  caret-color: var(--tb-glow);
  text-shadow: 0 0 6px rgba(90,242,255,0.4);
}
.tb-input::placeholder { color: rgba(234,252,255,0.35); }
.tb-input:disabled { opacity: 0.6; }
.tb-caret {
  position: absolute; left: 14px; top: 12px;
  font: 14px 'JetBrains Mono', monospace;
  color: var(--tb-glow);
  text-shadow: 0 0 10px var(--tb-glow);
  animation: cccCaret 1s steps(2) infinite;
  pointer-events: none;
}
.tb-input-frame.has-text .tb-caret,
.tb-input-frame.busy .tb-caret { display: none; }

.tb-processing {
  display: none;
  font: 11px 'JetBrains Mono', monospace;
  letter-spacing: 0.24em;
  color: var(--tb-amber);
  margin-top: 4px;
  text-shadow: 0 0 8px var(--tb-amber);
  animation: cccBreath 0.9s ease-in-out infinite;
}
.tb-input-frame.enhancing .tb-processing { display: block; }

/* ─── Helper buttons ──────────────────────────────────────────── */
.tb-actions {
  display: flex; gap: 8px;
  margin-top: 12px;
}
.tb-btn {
  flex: 1;
  position: relative;
  background: rgba(255,255,255,0.02);
  border: 1.5px solid var(--tb-glow2);
  color: var(--tb-glow2);
  font: 600 12px 'JetBrains Mono', monospace;
  letter-spacing: 0.18em;
  padding: 12px 8px;
  text-shadow: 0 0 10px var(--tb-glow2);
  box-shadow: inset 0 0 22px -8px var(--tb-glow2), 0 0 14px -8px var(--tb-glow2);
  cursor: pointer;
  text-transform: uppercase;
}
.tb-btn.amber {
  border-color: var(--tb-amber);
  color: var(--tb-amber);
  text-shadow: 0 0 10px var(--tb-amber);
  box-shadow: inset 0 0 22px -8px var(--tb-amber), 0 0 14px -8px var(--tb-amber);
}
.tb-btn:disabled {
  border-color: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.3);
  text-shadow: none;
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.6;
}

/* ─── TRANSMIT button ─────────────────────────────────────────── */
.tb-send {
  position: relative;
  margin-top: 10px;
  height: 60px;
  background: rgba(90,242,255,0.14);
  border: 2px solid var(--tb-glow);
  color: var(--tb-phosphor);
  font: 700 18px 'Orbitron', monospace;
  letter-spacing: 0.32em;
  overflow: hidden;
  text-shadow: 0 0 14px var(--tb-glow), 0 0 28px rgba(90,242,255,0.53);
  box-shadow: inset 0 0 40px -10px var(--tb-glow), 0 0 32px -8px var(--tb-glow);
  cursor: pointer;
}
.tb-send:disabled,
.tb-send.disabled {
  background: rgba(255,255,255,0.02);
  border-color: rgba(255,255,255,0.1);
  color: var(--tb-dim);
  text-shadow: none;
  box-shadow: none;
  cursor: not-allowed;
}
.tb-send-cooldown {
  position: absolute; top: 0; left: 0;
  height: 100%; width: 0%;
  background: var(--tb-glow);
  opacity: 0.22;
  transition: width 0.1s linear;
}
.tb-send-inner {
  position: relative;
  display: inline-flex; align-items: center; gap: 12px;
  height: 100%;
  justify-content: center; width: 100%;
}
.tb-send-inner .chev { font-size: 13px; }

/* ─── Now broadcasting + current prompt ───────────────────────── */
.tb-now {
  margin-top: 12px;
}
.tb-now-tag {
  display: flex; align-items: center; gap: 8px;
  font: 10px 'JetBrains Mono', monospace;
  letter-spacing: 0.3em;
  color: var(--tb-glow);
  text-transform: uppercase;
  text-shadow: 0 0 8px var(--tb-glow);
}
.tb-now-tag .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--tb-glow);
  box-shadow: 0 0 12px var(--tb-glow);
  animation: cccBreath 1.2s ease-in-out infinite;
}
.tb-quote {
  margin-top: 6px;
  font: 12.5px/1.32 'JetBrains Mono', monospace;
  letter-spacing: 0.01em;
  color: var(--tb-phosphor);
  text-shadow: 0 0 8px rgba(90,242,255,0.53);
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
  min-height: 80px;
}
.tb-quote.empty { opacity: 0.45; }

/* ─── Status msg & footer ─────────────────────────────────────── */
.tb-status-msg {
  margin-top: 4px;
  font: 10px 'JetBrains Mono', monospace;
  letter-spacing: 0.2em;
  color: var(--tb-amber);
  text-transform: uppercase;
  min-height: 14px;
  text-align: center;
}
.tb-footer {
  margin-top: 8px;
  text-align: center;
  font: 9px 'JetBrains Mono', monospace;
  letter-spacing: 0.16em;
  color: var(--tb-dim);
  text-transform: uppercase;
}
.tb-footer a {
  color: var(--tb-glow);
  text-decoration: none;
  border-bottom: 1px solid var(--tb-glow);
  padding-bottom: 1px;
}

/* ─── Keyframes ───────────────────────────────────────────────── */
@keyframes cccSweep {
  0%   { top: -80px; }
  100% { top: 110%; }
}
@keyframes cccTBJitter {
  0%, 92%, 100% { transform: translate(0, 0); }
  93% { transform: translate(-1px, 0); }
  94% { transform: translate(1px, -1px); }
  95% { transform: translate(-1px, 1px); }
  96% { transform: translate(1px, 0); }
}
@keyframes cccPhosphor {
  0%, 100% { text-shadow: 0 0 4px currentColor, 0 0 12px currentColor; }
  50%      { text-shadow: 0 0 5px currentColor, 0 0 18px currentColor; }
}