/* Signal Lab — hidden discovery overlay (index.html) */

.signal-lab {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 3vw, 32px);
  pointer-events: none;
  visibility: hidden;
}

.signal-lab.is-open {
  pointer-events: auto;
  visibility: visible;
}

.signal-lab__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.signal-lab.is-open .signal-lab__backdrop {
  opacity: 1;
}

.signal-lab__panel {
  position: relative;
  width: min(1100px, 96vw);
  height: min(85vh, 760px);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(74, 143, 143, 0.35);
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(184, 30, 44, 0.08) inset;
  background: #0a0a0f;
  opacity: 0;
  transform: translateY(24px) scale(0.97);
  transition:
    opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.55s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.signal-lab.is-open .signal-lab__panel {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.signal-lab__canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.signal-lab__hud {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 32px 32px;
  background: linear-gradient(to top, rgba(10, 10, 15, 0.92) 0%, rgba(10, 10, 15, 0.4) 70%, transparent 100%);
  pointer-events: none;
}

.signal-lab__kicker {
  margin: 0 0 6px;
  font-family: 'Rajdhani', system-ui, sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #4a8f8f;
}

.signal-lab__copy {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 500;
  color: #ececee;
  letter-spacing: -0.01em;
}

.signal-lab__hint {
  margin: 10px 0 0;
  font-size: 12px;
  color: rgba(236, 236, 238, 0.45);
}

.signal-lab__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(236, 236, 238, 0.12);
  border-radius: 50%;
  background: rgba(10, 10, 15, 0.6);
  color: rgba(236, 236, 238, 0.7);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.signal-lab__close:hover {
  border-color: rgba(184, 30, 44, 0.5);
  color: #ececee;
  background: rgba(184, 30, 44, 0.12);
}

.signal-lab__close:focus-visible {
  outline: 2px solid #4a8f8f;
  outline-offset: 2px;
}

/* Return-visit hint toast */
.signal-lab-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(74, 143, 143, 0.35);
  background: rgba(10, 10, 15, 0.88);
  color: rgba(236, 236, 238, 0.75);
  font-size: 13px;
  letter-spacing: 0.01em;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.4s ease,
    transform 0.45s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.signal-lab-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
  .signal-lab__panel {
    width: 100%;
    height: min(78vh, 620px);
    border-radius: 16px;
  }

  .signal-lab__hud {
    padding: 20px 20px 24px;
  }

  .signal-lab__copy {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .signal-lab__backdrop,
  .signal-lab__panel,
  .signal-lab-toast {
    transition: none;
  }

  .signal-lab__canvas {
    cursor: default;
  }
}