.lab-preview-row::before {
  position: absolute;
  z-index: 7;
  top: -38px;
  left: 0;
  padding: 7px 12px;
  border-radius: 999px;
  background: #e9dfcf;
  color: #67594e;
  content: "👀 Сверху только наблюдаем — здесь появится результат";
  font: 700 12px/1.2 Arial, sans-serif;
}

.lab-active-area {
  position: relative;
  margin: 26px -18px 0;
  padding: 28px 18px 24px;
  border-radius: 20px;
  background: linear-gradient(180deg, #fff3df 0, #fffaf2 100%);
  box-shadow: 0 10px 30px rgba(52, 45, 40, .1);
}

.lab-active-area::before {
  position: absolute;
  top: 10px;
  left: 22px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #db5b2d;
  color: #fff;
  content: "ИГРОВОЕ ПОЛЕ";
  font: 800 12px/1.2 Arial, sans-serif;
  letter-spacing: .07em;
}

.lab-action-guide {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 6px 0 18px;
  padding: 13px 16px;
  border-radius: 14px;
  background: #fff;
  color: #342d28;
  font: 700 16px/1.4 Arial, sans-serif;
  box-shadow: 0 5px 18px rgba(52, 45, 40, .1);
}

.lab-action-guide span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #db5b2d;
  color: #fff;
  font-size: 22px;
}

.lab-action-guide strong { color: #b8431d; }

/* Одинаковый визуальный язык во всех лабораториях:
   чёрные контакты на устройствах, красные — на активной схеме. */
.physical-row .real-contact,
.music-row .music-terminal,
.fan-row .fan-terminal {
  border-color: #fffaf2;
  background: #342d28;
  box-shadow: 0 0 0 2px #342d28;
}

.schematic-row .terminal:not(.is-connected),
.music-schematic__row [data-music-terminal]:not(.connected),
.fan-scheme-row [data-fan-terminal]:not(.connected) {
  border-color: #fff;
  background: #db5b2d;
  box-shadow: 0 0 0 2px #db5b2d, 0 4px 10px rgba(52, 40, 32, .22);
}

.lab-active-area .terminal:not(.is-connected),
.lab-active-area [data-music-terminal]:not(.connected),
.lab-active-area [data-fan-terminal]:not(.connected) {
  animation: lab-contact-pulse 1.4s ease-in-out infinite;
}

.lab-active-area.has-interaction .terminal,
.lab-active-area.has-interaction [data-music-terminal],
.lab-active-area.has-interaction [data-fan-terminal] {
  animation: none;
}

@keyframes lab-contact-pulse {
  0%, 100% { box-shadow: 0 0 0 2px #db5b2d, 0 0 0 0 rgba(219, 91, 45, .5); }
  50% { box-shadow: 0 0 0 2px #db5b2d, 0 0 0 9px rgba(219, 91, 45, 0); }
}

@media (max-width: 700px) {
  .lab-preview-row::before {
    top: -34px;
    max-width: calc(100% - 10px);
    padding: 6px 9px;
    font-size: 9px;
  }
  .lab-active-area { margin: 22px -7px 0; padding: 26px 7px 18px; }
  .lab-active-area::before { top: 8px; left: 12px; padding: 5px 10px; font-size: 9px; }
  .lab-action-guide { gap: 8px; margin-bottom: 12px; padding: 10px; font-size: 12px; }
  .lab-action-guide span { width: 30px; height: 30px; font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  .lab-active-area .terminal,
  .lab-active-area [data-music-terminal],
  .lab-active-area [data-fan-terminal] { animation: none !important; }
}