/* Four-channel receiver for short, current observations. */
.signal-receiver {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.signal-receiver-scale {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  padding: 18px 16px 18px 0;
  color: var(--ink-faint);
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0;
  text-align: right;
  user-select: none;
}

#currentSignalChannels {
  min-width: 0;
}

.signal-channel {
  position: relative;
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  min-height: 108px;
  padding: 18px 20px 18px 26px;
  border-bottom: 1px solid var(--line);
}

.signal-channel::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 0;
  width: 2px;
  background: var(--signal-accent, var(--platform-accent));
  content: "";
}

.signal-channel:last-child {
  border-bottom: 0;
}

.signal-channel-meta {
  color: var(--platform-cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.65;
  letter-spacing: 0;
}

.signal-channel h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0;
}

.signal-channel p {
  margin: 5px 0 0;
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
}

.signal-channel-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--signal-accent, var(--platform-accent));
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
  white-space: nowrap;
}

.signal-channel-status::before {
  width: 7px;
  height: 7px;
  background: currentColor;
  box-shadow: 0 0 12px currentColor;
  content: "";
}

/* 频道 accent 由内容数据给出，多为柠檬绿一类亮色：纸面上当 10px 文字读不出来。
   文字改用墨色，频道色仍由这颗指示点表达。 */
html[data-theme="light"] .signal-channel-status {
  color: var(--ink-dim);
}

html[data-theme="light"] .signal-channel-status::before {
  background: var(--signal-accent, var(--platform-accent));
  box-shadow: none;
}

@media (max-width: 720px) {
  .signal-receiver {
    grid-template-columns: 1fr;
  }

  .signal-receiver-scale {
    display: none;
  }

  .signal-channel {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 16px;
    min-height: 0;
    padding: 18px 12px 18px 18px;
  }

  .signal-channel-meta {
    grid-column: 1;
    grid-row: 1;
  }

  .signal-channel > div:nth-child(2) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .signal-channel-status {
    grid-column: 2;
    grid-row: 1;
  }
}